The pressure sensing member consists of, for example a bellows, which expands to increase the flow passage area in the gas supply passage to decrease the displacement, when the intake pressure decreases. The present invention will be well understood from the following detailed description and the accompanying drawings which are given by way of illustration only, and thus, are not limitative of this invention, and wherein: The drive unit includes a cylindrical solenoid housing, The displacement control system A includes a means for detecting the discharge pressure Pd (discharge pressure detection means), The displacement control system A includes a target discharge pressure setting means, The displacement control system A also includes a means for detecting the temperature Teo of air at an air outlet of the evaporator, The displacement control system A further includes a means (evaporator-outlet target air temperature setting means), The target discharge pressure setting means. 
MACS is your source for trusted mobile A/C technical information! These cookies track visitors across websites and collect information to provide customized ads. 0000080460 00000 n
As demand decreases, the wobble plate is moved to a lesser angle providing lesser, or minimum output.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'freeasestudyguides_com-medrectangle-4','ezslot_0',116,'0','0'])};if(typeof __ez_fad_position!='undefined'){__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0')}; The control valve connected to the suction and discharge ports may be mechanically or computer-controlled. The one on the left has the bridges located inside of the hub. When cabin temperatures are warm, and air conditioning demand is high, the low side pressure is also high. 0000022586 00000 n
acdelco displacement variable ac compressors RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A. SECURITY AGREEMENT;ASSIGNOR:ALLIANCE LAUNDRY SYSTEMS LLC;REEL/FRAME:025311/0911, Owner name: Last, the displacement control system of the variable displacement compressor according to the present invention is applicable to the refrigeration cycle in general, including the refrigeration cycle of an indoor air conditioning system other than the automotive air conditioning system, the refrigeration cycle of a freezing apparatus such as a refrigerator-freezer, etc. The only variables, therefore, are compressor speed and quantity of refrigerant in the system. The idling mode contributes to stabilizing the engine revolving speed when the vehicle is in the idling state. Both use bridges which break if a compressor lock-up occurs. 
Earlier models tended to be clutch less, whereas in recent years, there has been a move toward using clutches. Type
variable displacement compressor activities, Official Announcement Matter in Personal Data Protection Law. Variable displacement compressors have a swash plate, which is held at an angle with two springs. The stroke of the piston, therefore, the displacement, or amount of the operating fluid discharged per reciprocation is varied by varying pressure in the crank chamber (control pressure). Using a bellows in the pressure sensing part, these control valves are highly responsive even to very small changes in pressure.EKK's proprietary Direct Pressure Sensing (DPS) structure is patented (PAT. 0000007822 00000 n
Further, this displacement control system of the variable control compressor allows a wide range of control of intake pressure or control pressure. The pistons are attached to an axial wobble plate that changes its angle based on the difference in pressure between the top of the piston and the housing. PXE is a swash plate type variable displacement compressor without clutch assembly for power transmission. Method for controlling a compressor having a motor of a refrigeration system and a compressor of a refrigeration system, Compressor operating control method and device, Apparatus and method for controlling compressor, For controlling the control method and heat pump unit of the operation of compressor, Parameter selection assistance system, parameter selection assistance method, and parameter selection assistance program, Control system for a compressor, electronic control valve for the same, and compressor with the same, Variable-capacity air conditioner and variable-capacity control method thereof, Method for operating a refrigeration system for a vehicle with a refrigerant circuit that can be operated for a refrigeration system operation, Control system for variable capacity type compressor for air conditioning system of vehicle, Variable displacement compressor and displacement control valve system for use therein, Apparatus and method for controlling variable displacement compressor, Displacement controller of variable displacement compressor, Piston type variable displacement compressor, Variable displacement compressors and methods for controlling the same, Controlling apparatus and controlling method for mode change type refrigerating system, Method and device for operating a refrigerant system, Method of controlling refrigeration cycle, Air conditioning system with electric compressor, Control valve device for variable capacity type swash plate compressor, Air conditioning apparatus using variable displacement compressor, Controller for variable displacement compressor and control method for the same, Dynamic control of a variable displacement compressor, Air conditioner and control system therefor, Control apparatus for variable capacity compressor and method of calculating torque of variable capacity compressor, Method for controlling variable capacity compressor of air conditioner, Vehicle air conditioner with variable displacement compressor, Control system for variable displacement compressor, Variable capacity compressor controller and variable capacity compressor control method, Displacement control system for a variable displacement compressor, Capacity Control Valve, Variable Capacity Compressor and Capacity Control System Therefor, Capacity Control System for Variable Capacity Compressor and Display Device for the System, Variable Displacement Type Reciprocating Compressor, Control valve for variable displacement compressor, Volume control valve for variable capacity compressor, Control method for air conditioner and variable capacity compressor, Compression capacity controller for refrigeration cycle, Controlling equipment of variable displacement compressor, Delivery capacity control mechanism of variable displacement swash plate compressor, Compressor displacement control device and refrigeration cycle device, Capacity control system for variable capacity compressor and display device for the system, Displacement control apparatus for variable displacement compressor, displacement control method and compressor module, Control apparatus and control method for variable displacement compressor, Control valve of displacement variable compressor, Drive torque arithmetic unit for compressor and capacity control system of variable displacement compressor, Variable capacity controller for refrigeration cycle, Control valve of variable displacement type compressor, Control method of a compressor of air conditioner for vehicle, Variable displacement swash plate-type compressor and air conditioning system using said compressor, Capacity control valve, capacity control system and variable capacity compressor for variable capacity compressor, Variable displacement compressor and control method thereof. compressor displacement fixed ec21 Thus, only with a simple structure, the displacement is prevented from increasing to its maximum when the refrigerant quantity is insufficient, so that the compressor is protected from damage. As this valve opens, it increases piston stroke increasing the volume or displacement of the refrigerant's flow through the compressor. 0000050943 00000 n
That means, whenever the compressor is turning the pistons are always moving through the same travel, compressing the gas. Consequently, even when the heat load on the refrigeration cycle is great, this displacement control system does not lose control over displacement. This means that there is a variable output for this compressor. This website uses cookies to improve your experience while you navigate through the website.
the low-pressure section is a section from the expansion device to an intake chamber of the variable displacement compressor. Please see picture #4. PXC is a swash plate type variable displacement compressor with clutch assembly for power transmission, which is adaptable to a wide range of vehicle needs. the external information detection means includes an evaporator-outlet air temperature detection means measuring the temperature of air immediately after passing across the evaporator, and. In such case, actual intake pressure may exceed the range of control, resulting in complete loss of control over displacement. 0000020817 00000 n in said second setting mode, the target pressure setting means sets said target for pressure to cause the driving load calculated by the driving load calculation means to approach the target for driving load. 0000007068 00000 n Sanden variable compressors contribute to lower fuel consumption, CO2 emission reduction and drivers' comfort. Changing the stroke of the pistons changes the displacement or output of the compressor. 0000081163 00000 n Displacement Control System for Variable Displacement Compressor.
In the first and second embodiments, the control device A, B is composed of an ECU, which ECU may be integrated with an air conditioning ECU or an engine ECU. 0000001936 00000 n In the above-described displacement control system A, the discharge control valve, Further, the discharge pressure detection means, Further, in the above-described displacement control system A, in order to ensure that the target intake pressure Psset is set in an appropriate range, the allowable range for the target intake pressure Psset is defined by the upper and lower limits Ps, Further, in the above-described displacement control system A, the displacement control valve, In the above-described displacement control system A, when the discharge pressure Pd is higher than the preset upper limit Pdset. Fixed displacement compressors have a swash plate, which is set at a fixed angle. In order to achieve the above objects, the present invention provides a displacement control system of a variable displacement compressor provided in a circulation line along which a refrigerant circulates, together with a radiator, an expansion device and an evaporator to constitute a refrigeration cycle of an air conditioning system, and designed such that variation in control pressure causes variation in displacement, comprising a displacement control valve including a valve body capable of opening and closing a valve hole by receiving high-pressure, at least either of low-pressure and said control pressure, and electromagnetic force generated by a solenoid, where the high-pressure is the pressure of the refrigerant at a location in a high-pressure section of the refrigeration cycle and the low-pressure is the pressure of the refrigerant at a location in a low-pressure section of the refrigeration cycle, the displacement control valve being capable of regulating the displacement of the variable displacement compressor by varying said control pressure by opening and closing the valve hole; a high-pressure detection means detecting said high-pressure; an external information detection means detecting external information about the refrigeration cycle; a target pressure setting means setting a target for said low-pressure or said control pressure on the basis of the external information detected by said external information detection means; and a current regulation means capable of regulating current supplied to the solenoid of the displacement control valve in one or more regulation modes, where in a first regulation mode, the current regulation means regulates the current supplied to the solenoid of the displacement control valve, on the basis of the high-pressure detected by the high-pressure detection means and the target for pressure set by the target pressure setting means (claim, It is desirable that the current regulation means regulate the current supplied to the solenoid of the displacement control valve, on the basis of a difference between the high-pressure detected by the high-pressure detection means and the target for pressure set by the target pressure setting means (claim, It is desirable that the high-pressure section be a section from a discharge chamber of the variable displacement compressor to the expansion device, and that the low-pressure section be a section from the expansion device to an intake chamber of the variable displacement compressor (claim, It is desirable that the high-pressure detection means include a pressure detection means detecting the pressure of the refrigerant at a location in the high-pressure section (claim, It is desirable that the high-pressure detection means include a temperature detection means detecting the temperature of the refrigerant at a location in the high-pressure section (claim, It is desirable that the high-pressure detection means directly or indirectly detect the pressure of the refrigerant in the discharge chamber of the variable displacement compressor as said high-pressure, and that the target for pressure set by the target pressure setting means be a target for the pressure of the refrigerant in the intake chamber of the variable displacement compressor (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a first setting mode designed to set a target for temperature of air immediately after passing across the evaporator, and set said target for pressure to cause the temperature of air immediately after passing across the evaporator to approach said target for temperature (claim, It is desirable that the external information detection means include an evaporator-outlet air temperature detection means measuring the temperature of air immediately after passing across the evaporator, and that in said first setting mode, the target pressure setting means set said target for pressure to cause the temperature of air immediately after passing across the evaporator, detected by said evaporator-outlet air temperature detection means to approach said target for temperature (claim, It is desirable that the external information detection means include a heat load detection means detecting heat load on the refrigeration cycle, and that in said first setting mode, the target pressure setting means set said target for pressure, on the basis of the heat load detected by the heat load detection means, to cause the temperature of air immediately after passing across the evaporator to approach said target for temperature (claim, It is desirable that the air conditioning system be applied to a vehicle, that the external information detection means include a heat load detection means detecting heat load on the refrigeration cycle, and an operating condition detection means detecting operating conditions of at least either of the variable displacement compressor and the vehicle, and that in said first setting mode, the target pressure setting means set said target for pressure, on the basis of the heat load on the refrigeration cycle detected by the heat load detection means and the operating conditions of at least either of the variable displacement compressor and the vehicle detected by the operating condition detection means (claim, It is desirable that said one or more setting modes further include a second setting mode designed to set a target for variable-displacement-compressor driving load, and set said target for pressure to cause the variable-displacement-compressor driving load to approach said target for driving load (claim, It is desirable that said one or more setting modes further include a third setting mode designed to set a target for said high-pressure, and set said target for pressure to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that when the high-pressure detected by the high-pressure detection means exceeds an upper limit, the target pressure setting means take the third setting mode, giving it priority over the first and second setting modes (claim, It is desirable that a driving load calculation means calculating the variable-displacement-compressor driving load be further provided, and that in said second setting mode, the target pressure setting means set said target for pressure to cause the driving load calculated by the driving load calculation means to approach the target for driving load (claim, It is desirable that the driving load calculation means calculate the variable-displacement-compressor driving load on the basis of a difference between said high-pressure and said low-pressure or a difference between said high-pressure and said control pressure or a physical quantity correlating with one of these differences (claim, It is desirable that the driving load calculation means calculate the variable-displacement-compressor driving load on the basis of the current supplied to the solenoid as said physical quantity (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions is that the air conditioning system is switched on (claim, It is desirable that the second setting mode be maintained for a predetermined period of time after the target pressure setting means takes the second setting mode (claim, It is desirable that the air conditioning system be applied to a vehicle, and that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation relating to the operating conditions of the vehicle (claim, It is desirable that one of said one or more execution conditions be that the vehicle is in an idling state (claim, It is desirable that one of said one or more execution conditions include a limitation that at least either of throttle opening degree and engine revolving speed is greater than or equal to a predetermined value (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that the heat load on the refrigeration cycle is greater than or equal to a predetermined value (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that at least either of throttle opening degree and engine revolving speed exceeds a predetermined value and the heat load on the refrigeration cycle is greater than or equal to a predetermined value (claim, It is desirable that one of said one or more execution conditions include a limitation that the current now being supplied to the solenoid in the first setting mode is greater than the current estimated to be supplied to the solenoid in the second setting mode (claim, It is desirable that the current supply means store the target for pressure immediately before a shift from the first setting mode to the second setting mode, and when a shift from the second setting mode back to the first setting mode takes place, regulate the current supplied to the solenoid on the basis of the stored target for pressure (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a second setting mode designed to set a target for variable-displacement-compressor driving load, and set said target for pressure to cause the variable-displacement-compressor driving load to approach said target for driving load (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a third setting mode designed to set a target for said high-pressure, and set said target for pressure to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that the variable displacement compressor include a housing with a discharge chamber, a crank chamber, an intake chamber and cylinder bores defined inside, pistons fitted in the respective cylinder bores, a drive shaft rotatably supported inside the housing, a conversion mechanism including a swash plate variable in inclination and converting rotation of the drive shaft into reciprocating motion of the pistons, a gas supply passage connecting the discharge chamber and the crank chamber, and a gas release passage connecting the crank chamber and the intake chamber, wherein the displacement control valve be incorporated in either of the gas supply passage and the gas release passage (claim, It is desirable that the target pressure setting means set said target for pressure between preset upper and lower limits (claim, It is desirable that said upper and lower limits be varied on the basis of external information detected by the external information detection means (claim, It is desirable that when the high-pressure detected by the high-pressure detection means exceeds a preset upper limit for the high-pressure, said current regulation means take a second regulation mode, giving it priority over said first regulation mode, and in the second regulation mode, set a target for the high-pressure and regulate the current supplied to the solenoid to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that the refrigerant be carbon dioxide (claim, In the displacement control system of the variable displacement compressor according to the present invention, recited in claim. Please see picture #1. PATENTED CASE, Owner name: The range of control of intake pressure can be widened by increasing the electromagnetic force generated by the solenoid. - Controls compressor pressure and rotational load to improve the fuel consumption. 0000002467 00000 n Your email address will not be published. - Pressure control valves for automotive air-conditioning variable displacement compressors System, Variable These cookies will be stored in your browser only with your consent. 0000080354 00000 n It is to be noted that an increase in current supplied to the solenoid. compressors displacement
This also means they are quieter and more durable. 0000045037 00000 n What looks like a clutch is just a pulley that is attached to the compressor shaft. %PDF-1.4 % ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME;ASSIGNOR:SANDEN CORPORATION;REEL/FRAME:053545/0524, Free format text: when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that the heat load on the refrigeration cycle is greater than or equal to a predetermined value. compressor displacement variable peugeot saloon 2000 2008 The one on the right has external bridges. displacement 6v12 peugoet They control the duty cycle of the valve, adjusting the compressor's displacement. the variable displacement compressor includes. displacement draining gm Further, the high-pressure detection means, which is not a new element added for the present invention but an element indispensable for the refrigeration cycle to protect the compressor, does not lead to an increase in complexity of the displacement control system. However, for example when the refrigerant quantity is insufficient in the automotive air conditioning system, the displacement control on the variable displacement compressor by the control device disclosed in Patent Document 1 results in a smaller differential pressure between the discharge chamber and the intake chamber, compared with when the refrigerant quantity is adequate. Join MACS as a member using this QR code! Otherwise, the vehicle could not be driven with the compressor locked up. Type Compressors, Fixed Displacement Type The present invention is not restricted to the above-described first embodiment but can be modified in various ways. A variable displacement compressor eliminates the need for a cycling clutch by altering the compressor's volume based on system demands. The significant widening of the range of control however entails an increase in size of the solenoid, which is undesirable in view of design rationality. The actuator (by which you can identify this as a variable compressor) controls the pressure to the swash plate. denso air conditioning compressor system Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
MACS is your source for trusted mobile A/C technical information! These cookies track visitors across websites and collect information to provide customized ads. 0000080460 00000 n
As demand decreases, the wobble plate is moved to a lesser angle providing lesser, or minimum output.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'freeasestudyguides_com-medrectangle-4','ezslot_0',116,'0','0'])};if(typeof __ez_fad_position!='undefined'){__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0')}; The control valve connected to the suction and discharge ports may be mechanically or computer-controlled. The one on the left has the bridges located inside of the hub. When cabin temperatures are warm, and air conditioning demand is high, the low side pressure is also high. 0000022586 00000 n
acdelco displacement variable ac compressors RELEASE BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA, N.A. SECURITY AGREEMENT;ASSIGNOR:ALLIANCE LAUNDRY SYSTEMS LLC;REEL/FRAME:025311/0911, Owner name: Last, the displacement control system of the variable displacement compressor according to the present invention is applicable to the refrigeration cycle in general, including the refrigeration cycle of an indoor air conditioning system other than the automotive air conditioning system, the refrigeration cycle of a freezing apparatus such as a refrigerator-freezer, etc. The only variables, therefore, are compressor speed and quantity of refrigerant in the system. The idling mode contributes to stabilizing the engine revolving speed when the vehicle is in the idling state. Both use bridges which break if a compressor lock-up occurs. 
Earlier models tended to be clutch less, whereas in recent years, there has been a move toward using clutches. Type
variable displacement compressor activities, Official Announcement Matter in Personal Data Protection Law. Variable displacement compressors have a swash plate, which is held at an angle with two springs. The stroke of the piston, therefore, the displacement, or amount of the operating fluid discharged per reciprocation is varied by varying pressure in the crank chamber (control pressure). Using a bellows in the pressure sensing part, these control valves are highly responsive even to very small changes in pressure.EKK's proprietary Direct Pressure Sensing (DPS) structure is patented (PAT. 0000007822 00000 n
Further, this displacement control system of the variable control compressor allows a wide range of control of intake pressure or control pressure. The pistons are attached to an axial wobble plate that changes its angle based on the difference in pressure between the top of the piston and the housing. PXE is a swash plate type variable displacement compressor without clutch assembly for power transmission. Method for controlling a compressor having a motor of a refrigeration system and a compressor of a refrigeration system, Compressor operating control method and device, Apparatus and method for controlling compressor, For controlling the control method and heat pump unit of the operation of compressor, Parameter selection assistance system, parameter selection assistance method, and parameter selection assistance program, Control system for a compressor, electronic control valve for the same, and compressor with the same, Variable-capacity air conditioner and variable-capacity control method thereof, Method for operating a refrigeration system for a vehicle with a refrigerant circuit that can be operated for a refrigeration system operation, Control system for variable capacity type compressor for air conditioning system of vehicle, Variable displacement compressor and displacement control valve system for use therein, Apparatus and method for controlling variable displacement compressor, Displacement controller of variable displacement compressor, Piston type variable displacement compressor, Variable displacement compressors and methods for controlling the same, Controlling apparatus and controlling method for mode change type refrigerating system, Method and device for operating a refrigerant system, Method of controlling refrigeration cycle, Air conditioning system with electric compressor, Control valve device for variable capacity type swash plate compressor, Air conditioning apparatus using variable displacement compressor, Controller for variable displacement compressor and control method for the same, Dynamic control of a variable displacement compressor, Air conditioner and control system therefor, Control apparatus for variable capacity compressor and method of calculating torque of variable capacity compressor, Method for controlling variable capacity compressor of air conditioner, Vehicle air conditioner with variable displacement compressor, Control system for variable displacement compressor, Variable capacity compressor controller and variable capacity compressor control method, Displacement control system for a variable displacement compressor, Capacity Control Valve, Variable Capacity Compressor and Capacity Control System Therefor, Capacity Control System for Variable Capacity Compressor and Display Device for the System, Variable Displacement Type Reciprocating Compressor, Control valve for variable displacement compressor, Volume control valve for variable capacity compressor, Control method for air conditioner and variable capacity compressor, Compression capacity controller for refrigeration cycle, Controlling equipment of variable displacement compressor, Delivery capacity control mechanism of variable displacement swash plate compressor, Compressor displacement control device and refrigeration cycle device, Capacity control system for variable capacity compressor and display device for the system, Displacement control apparatus for variable displacement compressor, displacement control method and compressor module, Control apparatus and control method for variable displacement compressor, Control valve of displacement variable compressor, Drive torque arithmetic unit for compressor and capacity control system of variable displacement compressor, Variable capacity controller for refrigeration cycle, Control valve of variable displacement type compressor, Control method of a compressor of air conditioner for vehicle, Variable displacement swash plate-type compressor and air conditioning system using said compressor, Capacity control valve, capacity control system and variable capacity compressor for variable capacity compressor, Variable displacement compressor and control method thereof. compressor displacement fixed ec21 Thus, only with a simple structure, the displacement is prevented from increasing to its maximum when the refrigerant quantity is insufficient, so that the compressor is protected from damage. As this valve opens, it increases piston stroke increasing the volume or displacement of the refrigerant's flow through the compressor. 0000050943 00000 n
That means, whenever the compressor is turning the pistons are always moving through the same travel, compressing the gas. Consequently, even when the heat load on the refrigeration cycle is great, this displacement control system does not lose control over displacement. This means that there is a variable output for this compressor. This website uses cookies to improve your experience while you navigate through the website. 
the low-pressure section is a section from the expansion device to an intake chamber of the variable displacement compressor. Please see picture #4. PXC is a swash plate type variable displacement compressor with clutch assembly for power transmission, which is adaptable to a wide range of vehicle needs. the external information detection means includes an evaporator-outlet air temperature detection means measuring the temperature of air immediately after passing across the evaporator, and. In such case, actual intake pressure may exceed the range of control, resulting in complete loss of control over displacement. 0000020817 00000 n in said second setting mode, the target pressure setting means sets said target for pressure to cause the driving load calculated by the driving load calculation means to approach the target for driving load. 0000007068 00000 n Sanden variable compressors contribute to lower fuel consumption, CO2 emission reduction and drivers' comfort. Changing the stroke of the pistons changes the displacement or output of the compressor. 0000081163 00000 n Displacement Control System for Variable Displacement Compressor.
In the first and second embodiments, the control device A, B is composed of an ECU, which ECU may be integrated with an air conditioning ECU or an engine ECU. 0000001936 00000 n In the above-described displacement control system A, the discharge control valve, Further, the discharge pressure detection means, Further, in the above-described displacement control system A, in order to ensure that the target intake pressure Psset is set in an appropriate range, the allowable range for the target intake pressure Psset is defined by the upper and lower limits Ps, Further, in the above-described displacement control system A, the displacement control valve, In the above-described displacement control system A, when the discharge pressure Pd is higher than the preset upper limit Pdset. Fixed displacement compressors have a swash plate, which is set at a fixed angle. In order to achieve the above objects, the present invention provides a displacement control system of a variable displacement compressor provided in a circulation line along which a refrigerant circulates, together with a radiator, an expansion device and an evaporator to constitute a refrigeration cycle of an air conditioning system, and designed such that variation in control pressure causes variation in displacement, comprising a displacement control valve including a valve body capable of opening and closing a valve hole by receiving high-pressure, at least either of low-pressure and said control pressure, and electromagnetic force generated by a solenoid, where the high-pressure is the pressure of the refrigerant at a location in a high-pressure section of the refrigeration cycle and the low-pressure is the pressure of the refrigerant at a location in a low-pressure section of the refrigeration cycle, the displacement control valve being capable of regulating the displacement of the variable displacement compressor by varying said control pressure by opening and closing the valve hole; a high-pressure detection means detecting said high-pressure; an external information detection means detecting external information about the refrigeration cycle; a target pressure setting means setting a target for said low-pressure or said control pressure on the basis of the external information detected by said external information detection means; and a current regulation means capable of regulating current supplied to the solenoid of the displacement control valve in one or more regulation modes, where in a first regulation mode, the current regulation means regulates the current supplied to the solenoid of the displacement control valve, on the basis of the high-pressure detected by the high-pressure detection means and the target for pressure set by the target pressure setting means (claim, It is desirable that the current regulation means regulate the current supplied to the solenoid of the displacement control valve, on the basis of a difference between the high-pressure detected by the high-pressure detection means and the target for pressure set by the target pressure setting means (claim, It is desirable that the high-pressure section be a section from a discharge chamber of the variable displacement compressor to the expansion device, and that the low-pressure section be a section from the expansion device to an intake chamber of the variable displacement compressor (claim, It is desirable that the high-pressure detection means include a pressure detection means detecting the pressure of the refrigerant at a location in the high-pressure section (claim, It is desirable that the high-pressure detection means include a temperature detection means detecting the temperature of the refrigerant at a location in the high-pressure section (claim, It is desirable that the high-pressure detection means directly or indirectly detect the pressure of the refrigerant in the discharge chamber of the variable displacement compressor as said high-pressure, and that the target for pressure set by the target pressure setting means be a target for the pressure of the refrigerant in the intake chamber of the variable displacement compressor (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a first setting mode designed to set a target for temperature of air immediately after passing across the evaporator, and set said target for pressure to cause the temperature of air immediately after passing across the evaporator to approach said target for temperature (claim, It is desirable that the external information detection means include an evaporator-outlet air temperature detection means measuring the temperature of air immediately after passing across the evaporator, and that in said first setting mode, the target pressure setting means set said target for pressure to cause the temperature of air immediately after passing across the evaporator, detected by said evaporator-outlet air temperature detection means to approach said target for temperature (claim, It is desirable that the external information detection means include a heat load detection means detecting heat load on the refrigeration cycle, and that in said first setting mode, the target pressure setting means set said target for pressure, on the basis of the heat load detected by the heat load detection means, to cause the temperature of air immediately after passing across the evaporator to approach said target for temperature (claim, It is desirable that the air conditioning system be applied to a vehicle, that the external information detection means include a heat load detection means detecting heat load on the refrigeration cycle, and an operating condition detection means detecting operating conditions of at least either of the variable displacement compressor and the vehicle, and that in said first setting mode, the target pressure setting means set said target for pressure, on the basis of the heat load on the refrigeration cycle detected by the heat load detection means and the operating conditions of at least either of the variable displacement compressor and the vehicle detected by the operating condition detection means (claim, It is desirable that said one or more setting modes further include a second setting mode designed to set a target for variable-displacement-compressor driving load, and set said target for pressure to cause the variable-displacement-compressor driving load to approach said target for driving load (claim, It is desirable that said one or more setting modes further include a third setting mode designed to set a target for said high-pressure, and set said target for pressure to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that when the high-pressure detected by the high-pressure detection means exceeds an upper limit, the target pressure setting means take the third setting mode, giving it priority over the first and second setting modes (claim, It is desirable that a driving load calculation means calculating the variable-displacement-compressor driving load be further provided, and that in said second setting mode, the target pressure setting means set said target for pressure to cause the driving load calculated by the driving load calculation means to approach the target for driving load (claim, It is desirable that the driving load calculation means calculate the variable-displacement-compressor driving load on the basis of a difference between said high-pressure and said low-pressure or a difference between said high-pressure and said control pressure or a physical quantity correlating with one of these differences (claim, It is desirable that the driving load calculation means calculate the variable-displacement-compressor driving load on the basis of the current supplied to the solenoid as said physical quantity (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions is that the air conditioning system is switched on (claim, It is desirable that the second setting mode be maintained for a predetermined period of time after the target pressure setting means takes the second setting mode (claim, It is desirable that the air conditioning system be applied to a vehicle, and that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation relating to the operating conditions of the vehicle (claim, It is desirable that one of said one or more execution conditions be that the vehicle is in an idling state (claim, It is desirable that one of said one or more execution conditions include a limitation that at least either of throttle opening degree and engine revolving speed is greater than or equal to a predetermined value (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that the heat load on the refrigeration cycle is greater than or equal to a predetermined value (claim, It is desirable that the target pressure setting means take the second setting mode, when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that at least either of throttle opening degree and engine revolving speed exceeds a predetermined value and the heat load on the refrigeration cycle is greater than or equal to a predetermined value (claim, It is desirable that one of said one or more execution conditions include a limitation that the current now being supplied to the solenoid in the first setting mode is greater than the current estimated to be supplied to the solenoid in the second setting mode (claim, It is desirable that the current supply means store the target for pressure immediately before a shift from the first setting mode to the second setting mode, and when a shift from the second setting mode back to the first setting mode takes place, regulate the current supplied to the solenoid on the basis of the stored target for pressure (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a second setting mode designed to set a target for variable-displacement-compressor driving load, and set said target for pressure to cause the variable-displacement-compressor driving load to approach said target for driving load (claim, It is desirable that the target pressure setting means be capable of setting the target for pressure in one or more setting modes, where said one or more setting modes include a third setting mode designed to set a target for said high-pressure, and set said target for pressure to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that the variable displacement compressor include a housing with a discharge chamber, a crank chamber, an intake chamber and cylinder bores defined inside, pistons fitted in the respective cylinder bores, a drive shaft rotatably supported inside the housing, a conversion mechanism including a swash plate variable in inclination and converting rotation of the drive shaft into reciprocating motion of the pistons, a gas supply passage connecting the discharge chamber and the crank chamber, and a gas release passage connecting the crank chamber and the intake chamber, wherein the displacement control valve be incorporated in either of the gas supply passage and the gas release passage (claim, It is desirable that the target pressure setting means set said target for pressure between preset upper and lower limits (claim, It is desirable that said upper and lower limits be varied on the basis of external information detected by the external information detection means (claim, It is desirable that when the high-pressure detected by the high-pressure detection means exceeds a preset upper limit for the high-pressure, said current regulation means take a second regulation mode, giving it priority over said first regulation mode, and in the second regulation mode, set a target for the high-pressure and regulate the current supplied to the solenoid to cause the high-pressure detected by the high-pressure detection means to approach said target for high-pressure (claim, It is desirable that the refrigerant be carbon dioxide (claim, In the displacement control system of the variable displacement compressor according to the present invention, recited in claim. Please see picture #1. PATENTED CASE, Owner name: The range of control of intake pressure can be widened by increasing the electromagnetic force generated by the solenoid. - Controls compressor pressure and rotational load to improve the fuel consumption. 0000002467 00000 n Your email address will not be published. - Pressure control valves for automotive air-conditioning variable displacement compressors System, Variable These cookies will be stored in your browser only with your consent. 0000080354 00000 n It is to be noted that an increase in current supplied to the solenoid. compressors displacement
This also means they are quieter and more durable. 0000045037 00000 n What looks like a clutch is just a pulley that is attached to the compressor shaft. %PDF-1.4 % ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME;ASSIGNOR:SANDEN CORPORATION;REEL/FRAME:053545/0524, Free format text: when any of one or more execution conditions is met, where one of said one or more execution conditions includes a limitation that the heat load on the refrigeration cycle is greater than or equal to a predetermined value. compressor displacement variable peugeot saloon 2000 2008 The one on the right has external bridges. displacement 6v12 peugoet They control the duty cycle of the valve, adjusting the compressor's displacement. the variable displacement compressor includes. displacement draining gm Further, the high-pressure detection means, which is not a new element added for the present invention but an element indispensable for the refrigeration cycle to protect the compressor, does not lead to an increase in complexity of the displacement control system. However, for example when the refrigerant quantity is insufficient in the automotive air conditioning system, the displacement control on the variable displacement compressor by the control device disclosed in Patent Document 1 results in a smaller differential pressure between the discharge chamber and the intake chamber, compared with when the refrigerant quantity is adequate. Join MACS as a member using this QR code! Otherwise, the vehicle could not be driven with the compressor locked up. Type Compressors, Fixed Displacement Type The present invention is not restricted to the above-described first embodiment but can be modified in various ways. A variable displacement compressor eliminates the need for a cycling clutch by altering the compressor's volume based on system demands. The significant widening of the range of control however entails an increase in size of the solenoid, which is undesirable in view of design rationality. The actuator (by which you can identify this as a variable compressor) controls the pressure to the swash plate. denso air conditioning compressor system Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
