阅读说明：本技术 车辆用空调的控制方法和车辆用空调装置 (The control method and air conditioner for vehicles of Vehicular air-conditioning ) 是由 大森将裕 长谷贵充 大村宁 于 2017-04-05 设计创作，主要内容包括：本发明提供一种在从燃料切断时抑制了压缩机容量的状态恢复为通常的压缩机容量时能够实现稳定的减速度的车辆用空调的控制方法以及车辆用空调装置。在本发明中,在使发动机输出满足车辆的驱动转矩和空调用压缩机的驱动转矩的合计值的转矩的车辆用空调的控制中,在将发动机的燃料切断时,将空调用压缩机的排放容量设为最小容量,在根据车室内的状态判断为需要将排放容量从最小容量起进行变更时,将排放容量从最小容量变更为在通常运转时所容许的上限容量,在从该变更起经过规定时间后,将排放容量从上限容量变更为与车厢内的状态相应的排放容量。(The present invention provides the control method and air conditioner for vehicles that can be realized the Vehicular air-conditioning of stable deceleration when a kind of state for inhibiting compressor capacity when from fuel cut-off reverts to common compressor capacity.In the present invention, in the control for making engine export the Vehicular air-conditioning of the torque of aggregate value for meeting the driving torque of vehicle and the driving torque of compressor, when by the fuel cut-off of engine, the discharge capacity of compressor is set as minimum capacity, be judged as according to the indoor state of vehicle need to change discharge capacity from minimum capacity when, discharge capacity is changed to from minimum capacity to the upper limit capacity allowed in usual operating, from the change after the stipulated time, discharge capacity is changed to discharge capacity corresponding with the state in compartment from upper limit capacity.)

1. a kind of control method of Vehicular air-conditioning, the Vehicular air-conditioning, which has, is driven by the engine and can change discharge appearance The compressor of amount adjusts the discharge capacity, the control method of the Vehicular air-conditioning according to the state in compartment It is characterized in that,

The engine output is set to meet the aggregate value of the driving torque of vehicle and the driving torque of the compressor Torque,

When by the fuel cut-off of the engine, the discharge capacity is set as minimum capacity,

Judge whether to need correspondingly to change the discharge capacity from minimum capacity with the state in compartment,

When being judged as that needs are changed from minimum capacity, the discharge capacity is changed to usually transporting from minimum capacity The upper limit capacity allowed when turning,

After the stipulated time, the discharge capacity is changed to and the shape in compartment from the upper limit capacity from the change The corresponding discharge capacity of state.

2. the control method of Vehicular air-conditioning according to claim 1, which is characterized in that

The stipulated time is the cogging of the driving torque of the compressor stable time.

3. the control method of Vehicular air-conditioning according to claim 1 or 2, which is characterized in that

After the stipulated time and being judged as the air-conditioning retrieved during the discharge capacity is set as minimum capacity When performance loss, the discharge capacity is changed to discharge capacity corresponding with the state in compartment from the upper limit capacity.

4. a kind of air conditioner for vehicles has the compressor for being driven by the engine and capable of changing discharge capacity, asks The engine output is asked to meet the torque of the aggregate value of the driving torque of vehicle and the driving torque of the compressor, The air conditioner for vehicles is characterized in that,

It is provided with according to the state in compartment and adjusts the volume controlled portion of the discharge capacity,

When by the fuel cut-off of the engine, the discharge capacity is set as minimum capacity by the volume controlled portion,

According to the state in compartment to determine whether needing to change the discharge capacity from minimum capacity,

If it is determined that needing to change from minimum capacity, then the discharge capacity is changed to from minimum capacity usual The upper limit capacity allowed when operating,

After the stipulated time, the discharge capacity is changed to arrange corresponding with the state in compartment from the upper limit capacity Put capacity.

Technical field

The present invention relates to the control methods and vehicle of a kind of Vehicular air-conditioning of compressor for having capacity variable type With air-conditioning device.

Background technique

In patent document 1, when carrying out inertia traveling in the state of leaving accelerator pedal, engine just carries out fuel spray When penetrating stopping control (being recorded as fuel cut-off below), started by the compressor capacity and reduction that inhibit compressor Machine load to inhibit the sense of discomfort of deceleration for the driver, and implements fuel cut-off until becoming lower vehicle Until fast region.

Summary of the invention

Problems to be solved by the invention

However, making the compressor capacity inhibited be restored to common compressor capacity in the technology of patent document 1 When, there are deviations for the distribution of torque of the load torque generated in compressor capacity change.Then, it is difficult to realization and compressor displacement Measure corresponding engine torque control, it is possible to bring deceleration sense of discomfort to occupant.

The object of the present invention is to provide one kind to inhibit the state of compressor capacity to restore when from fuel cut-off The control method and air conditioner for vehicles of the Vehicular air-conditioning of stable deceleration are realized when to common compressor capacity.

The solution to the problem

To achieve the goals above, in the present invention, as the driving torque and air-conditioning for so that engine output is met vehicle It, will when by the fuel cut-off of engine with the control of the Vehicular air-conditioning of the torque of the aggregate value of the driving torque of compressor The discharge capacity of compressor is set as minimum capacity, correspondingly holds discharge in the state being judged as in needs and compartment Amount is from minimum capacity when changing, and discharge capacity is changed to from minimum capacity to the upper limited capacity allowed in usual operating Amount after the stipulated time, discharge capacity is changed to from upper limit capacity corresponding with the state in compartment from the change Discharge capacity.

The effect of invention

That is, the discharge capacity of compressor is restored to discharge corresponding with the state in compartment from minimum capacity When capacity, after being changed to upper limit capacity from minimum capacity, change to discharge capacity corresponding with the state in compartment, therefore can The distribution of torque of load torque when changing compressor capacity is stablized, and can be realized stable deceleration.

Detailed description of the invention

Fig. 1 is the system diagram for applying the vehicle of air conditioner for vehicles of embodiment 1.

Fig. 2 is the flow chart for the fuel cut-off control processing for indicating to implement in the ECU of embodiment 1.

Fig. 3 is the flow chart for the engine torque control processing for indicating to implement in the ECU of embodiment 1.

Fig. 4 is the flow chart for the compressor capacity control processing for indicating to implement in the ACU of embodiment 1.

Fig. 5 is the timing diagram for indicating the compressor capacity control processing of embodiment 1.

Description of symbols

1: engine；3: automatic transmission；3a: lock-up clutch；3b: belt type adjustable speed drive structure；4: compressor； 4a: swash plate control valve；5: condenser；6: liquid storage dryer；7: expansion valve；8: evaporator；10: pressure sensor；12: air blast Machine；13: temperature sensor；20: air-conditioner controller (ACU)；22: engine controller (ECU)；27: gearbox controller (CVTCU)。

Specific embodiment

(embodiment 1)

Fig. 1 is the system diagram for applying the vehicle of air conditioner for vehicles of embodiment 1.From the engine as internal combustion engine The rotation of 1 output is input into automatic transmission 3.The rotation of automatic transmission 3 is input into via torque-converters and locking clutch Device 3a is input into belt type adjustable speed drive structure 3b.Lock-up clutch 3a is based on the control liquid supplied from control valve (not shown) Pressure is to control transmitting torque capacity.Rotation after having carried out speed change using belt type adjustable speed drive structure 3b is via final driving cog Wheel is transmitted to driving wheel.Engine 1 has the throttle valve 1a of adjustment inhaled air volume and the injector 1b of control fuel injection amount.

Air conditioner for vehicles has compressor 4, condenser 5, expansion valve 7 and the evaporator 8 of capacity variable type, constitutes The steam compression type refrigerating agent circulation for recycling refrigerant.Compressor 4 is swash plate piston type, by making relative to rotary shaft The swash plate obliquely installed rotation (not shown) is to drive piston, to compress refrigerant.Compressor 4 has swash plate control valve 4a changes the stroke amount of piston by changing the slope of swash plate.The discharge refrigerant capacity of compressor 4 is controlled as a result,.Compression Machine 4 is driven by belt pulley and belt 9 by engine 1.Compressor 4 has clutch 4b, passes through unlatching/pass of clutch 4b It closes to carry out the operating of compressor 4 and stopping.As the compressor 4 of embodiment 1, swash plate piston type is instantiated, but as long as being energy The compressor for enough controlling the capacity variable type of discharge refrigerant capacity, can be other forms.

Condenser 5 is mounted on front part of vehicle.Condenser 5 is using traveling wind pressure to by the compressed high temperature of compressor 4, height The refrigerant of pressure carries out cooling compartment external heat exchanger.Liquid storage dryer 6 is also referred to as fluid reservoir, carries out the gas-liquid point of refrigerant From the removal with moisture.Liquid storage dryer 6 is provided with the high-pressure side refrigerant pressure of detection steam compression type refrigerating agent circulation Pressure sensor 10.

Expansion valve (Expansion valve) 7 is to make high pressure and gasify under fixation pressure in the refrigerant of liquid as mist The expansion valve of the refrigerant of shape.Evaporator 8 be the downstream of the air blower 12 for the air-conditioning duct being arranged in compartment, for from The air that air blower 12 is sent carries out heat exchanger in cooling compartment.It is provided in the downstream of evaporator 8 and passes through for detecting The temperature sensor 13 of the temperature of the air-conditioner wind of evaporator 8.

Control unit of engine 10 (being recorded as ECU below) be based on it is corresponding with accelerator pedal aperture request torque Td and Load torque Tc corresponding with the working condition of compressor 4, to calculate target engine torque Te*.Engine speed sensor 23 detection engine speed Ne, and it is output to ECU.Vehicle speed sensor 24 detects vehicle velocity V SP, and is output to ECU.Accelerator pedal is opened The accelerator pedal aperture of sensors A PO detection driver is spent, and is output to ECU.ECU controls the throttle valve 1a of engine 1, injection Device 1b, to control the operating condition (engine speed Ne, motor torque Te) of engine 1.ECU is set up in defined condition When, implement the fuel cut-off (narration in detail below) for stopping fuel injection.

Transmission control unit 20 (being recorded as CVTCU below) receives the gear signal sent from selector (not shown), To control disconnection/engagement state of lock-up clutch 3a, the gear ratio of belt type adjustable speed drive structure 3b.Conditioning control unit 20, ECU and CVTCU is connected by can mutually send/receive the CAN communication line of information.

Conditioning control unit 20 (being recorded as ACU below) is the control device for carrying out the airconditioning control in compartment.ACU is received The pressure signal detected by pressure sensor 10 and the temperature signal detected by temperature sensor 13, and with it is aftermentioned Various signals (the discharge capacity of compressor 4 is mutually sent/received between control unit of engine 10, transmission control unit 20 Instruction value, pressure signal etc.).In addition, in ACU, control swash plate control valve 4a, the clutch 4b of compressor 4 so that become by Temperature Tset in the setting compartment of the settings such as occupant.

(fuel cut-off control processing)

Fig. 2 is the flow chart for the fuel cut-off control processing for indicating to implement in the ECU of embodiment 1.

In step sl, judge lock-up clutch 3a whether locking (being also recorded as engaging), be in lockup state when into Enter step S2, enter step S8 in the case where in addition to this, fuel cut-off (being also recorded as FC below) is stopped to (fuel spray It penetrates).

In step s 2, judge whether accelerator pedal aperture APO is 0, entered step when accelerator pedal aperture APO is 0 S2 enters step S8 in the case where in addition to this.In addition it is also possible to whether be that can be judged as driver's essence according to APO On leave the specified value of accelerator pedal hereinafter, to determine whether APO=0.

In step s3, judge whether vehicle velocity V SP is the first vehicle velocity V SP1 or more for allowing FC, be VSP1 in vehicle velocity V SP S4 is entered step when above, enters step S8 in the case where in addition to this.

In step s 4, implement (being also recorded as starting) FC.

In step s 5, judge whether vehicle velocity V SP reaches the first vehicle velocity V SP1, step is entered when reaching the first vehicle velocity V SP1 Rapid S6, return step S4 in the case where in addition to this continue to implement FC.

In step s 6, judge whether the discharge capacity Ccmp of the compressor 4 received from ACU is minimum capacity min, In Discharge capacity Ccmp enters step S7 in the case where being minimum capacity min, enters step S8 in the case where in addition to this.

In the step s 7, the first vehicle velocity V SP1 is changed to third vehicle velocity V SP3, third vehicle velocity V SP3 is than the first vehicle Fast VSP1 low speed.

In step s 8, stop FC, carry out fuel injection.

(compressor discharge volume controlled when about fuel cut-off control)

ECU carries out fuel cut-off in vehicle deceleration to improve fuel efficiency.In the vehicle of embodiment 1, In When compressor 4 is inoperative, fuel cut-off is able to carry out until becoming the low speed of such as 25km/h or so.At this point, making Lock-up clutch 3a engagement, inhibits the reduction of engine speed Ne, thus prevents engine misses.Carrying out fuel cut-off Under state, the frictional force of engine 1, for make the power of alternating current generator rotation (not shown) via lock-up clutch 3a act on In the direction for making vehicle deceleration.Therefore, compared with no state for carrying out fuel cut-off, the deceleration of vehicle becomes larger.In the shape Under state, when the compressor 4 of air-conditioning works, due to becoming much larger the deceleration of vehicle for driving the power of compressor 4.

In general, in the driving process of vehicle when decontroling accelerator pedal and brake pedal together, due to starting Mechanism is dynamic and vehicle gently slows down and (is also recorded as inertia traveling state below).The engine braking is in addition to including engine 1 Frictional force other than, further include make alternating current generator, compressor 4 rotate power.Therefore, although not trampling brake pedal, When the deceleration of the vehicle under inertia traveling state is excessive, sense of discomfort is caused for occupant.Accordingly, it is desirable in inertia traveling Under state, it is set as avoiding the deceleration (being recorded as the deceleration upper limit below) for the degree for causing occupant sense of discomfort.The known phase It hopes, the speed more low deceleration upper limit then in this case is smaller.

But in the vehicle for being equipped with automatic transmission as stepped automatic transmission, belt type continuously variable transmission In, when carrying out fuel cut-off under inertia traveling state, deceleration will not change according to speed, or that there are speeds is lower The then bigger tendency of deceleration.In addition, in the vehicle for being equipped with automatic transmission, such as in 45km/h or more and it is in inertia In the case where driving status, even if carrying out fuel cut-off, deceleration caused by vehicle is not more than the deceleration upper limit, separately Outside, which can be suppressed to the control by throttle valve opening to control the degree of the pump load of engine 1.However, Until speed is reduced to VSP1 (such as 35km/h before and after), to generate with high speed when same deceleration or its more than Deceleration when, can be more than the deceleration upper limit, bring sense of discomfort to occupant.Therefore, so as to the deceleration of actual vehicle and subtract The fuel cut-off that the consistent speed of speed limit, i.e. VSP1 (being recorded as restoring speed below) start again at fuel injection is extensive It is multiple.In other words, when compressor 4 works, fuel cut-off can not be carried out under VSP1 speed below, can not improve fuel effect Rate.Therefore, controlled so that inhibit compressor 4 discharge capacity and vehicle deceleration be no more than the deceleration upper limit.In In embodiment 1, the discharge capacity of compressor 4 is set as minimum capacity min.Moreover, the discharge capacity in compressor 4 is minimum When capacity min, in fuel cut-off control, it is changed to VSP3 from VSP1, implementing fuel cut-off until becoming lower speed is Only.

(project when being restored to control discharge capacity from minimum capacity)

Here, making it to after the discharge capacity of compressor 4 (being also recorded as Ccmp below) is set as minimum capacity min Reverting to usual state of a control when driving, (discharge capacity corresponding with the state in compartment (is recorded as control discharge to hold below Amount Cmp (con))) situation be illustrated.In ACU, usually when driving, in order to make to be detected by temperature sensor 13 Temperature reaches temperature Tset in set setting compartment, and calculates the target control discharge capacity of compressor 4, based on being detected Pressure signal out to export control discharge capacity con to swash plate control valve 4a.

When assuming that being changed to the case where controlling discharge capacity con from minimum capacity min, the load torque Tc of compressor 4 It is changed from load torque Tc (min) corresponding with minimum capacity min to load torque Tc (con) corresponding with Ccmp (con).This When, the load torque Tc even if the swash plate control valve 4a to compressor 4 is controlled, when changing from Tc (min) to Tc (con) Time change track (the following are distribution of torque) stability it is also insufficient.Here, considering compression in engine torque control The load torque Tc of machine 4 carries out engine torque control, therefore when distribution of torque generates deviation, subtracts from motor torque Te It goes the obtained value of load torque Tc to generate deviation, the torque for being transmitted to driving wheel can not be made to stablize, it is possible to which deceleration changes To bring sense of discomfort to driver.

Therefore, in embodiment 1, in the case where reverting to common Ccmp (con) from minimum capacity min, temporarily will Ccmp is set as upper limit capacity max, is changed into Ccmp (con) later.This is because: from minimum capacity min to upper limit capacity The deviation of distribution of torque when max changes is considerably less, and the control stability of compressor 4 is good.Even in addition, motor torque Control, also when Ccmp is set to min perhaps max based on min or max come calculated load torque Tc, be set in Ccmp When for Ccmp (con), when usual control in the same manner as, based on pressure signal P d come calculated load torque Tc.

(engine torque control processing)

Fig. 3 is the flow chart for the engine torque control processing for indicating to implement in the ECU of embodiment 1.

In step S31, it is based on accelerator pedal aperture APO, calculates the request torque Td of driver.

In step s 32, from ACU read in discharge capacity instruction value, judge compressor 4 discharge capacity Ccmp whether be The upper limit capacity max or minimum capacity min allowed when usually operating, in the feelings that discharge capacity Ccmp is max or min S33 is entered step under condition, enters step S34 in the case where in addition to this.

In step S33, the load generated in compressor 4 is calculated based on discharge capacity instruction value (max or min) and is turned Square Tc.

In step S34, the pressure signal P d detected by pressure sensor 10 is read in from ACU, is based on pressure signal P d To calculate the load torque Tc generated in compressor 4.

In step s 35, target engine torque is calculated according to the aggregate value of request torque Td and load torque Tc Te* controls throttle valve opening, fuel injection amount, so that motor torque Te becomes target engine torque Te*.

(compressor capacity control processing)

Fig. 4 is the flow chart for indicating the compressor capacity control processing implemented using the ACU of embodiment 1.

In step s 11, judge whether FC is starting (in fuel cut-off), enters step S12 when FC is starting, is removing S22 is entered step in the case where except this.

In step s 12, judge whether the evaporator temperature Teva detected by temperature sensor 13 is 5 DEG C hereinafter, In Evaporator temperature Teva is to enter step S14 in 5 DEG C of situations below, enters step S13 in the case where in addition to this.

In step s 13, the discharge capacity Ccmp of compressor 4 is set as upper limit capacity max, continues to that Teva becomes 5 DEG C or less until.

In step S14, judge whether vehicle velocity V SP is vehicle velocity V SP2 (such as 45km/h) hereinafter, in vehicle velocity V SP for VSP2 S16 is entered step when following, enters step S15 in the case where in addition to this, wherein vehicle velocity V SP2 is can be no more than The speed of the deceleration of the degree of the deceleration upper limit of sense of discomfort is brought to occupant.

In step S15, Ccmp is set as to the discharge capacity Ccmp (3 DEG C) that Teva can be made to maintain 3 DEG C, is continueed to Until VSP reaches VSP2.Sense of discomfort will not be brought to occupant as a result, even if being set as minimum capacity min later, can also prolonged Length can ensure the time of refrigerating capacity.

In step s 16, Ccmp is set as minimum capacity min.

In step S17, judge whether Teva become in setting compartment it is more than the corresponding temperature Teva (set) of temperature and In the presence of the releasing request of the minimum capacity min of the request based on refrigeration performance, S18, In are entered step when existing and releasing request In addition to this continue for Ccmp to be set as minimum capacity min in the case where.

In step S18, judge whether FC starts, FC starting when enter step S19, in the case where in addition to this into Enter step S20.

In step S19, Ccmp is set as upper limit capacity max, and control and request to ECU output throttling valve.That is, by It is unable to control fuel injection amount during being in implementation FC, therefore carry out opening control to throttle valve opening to make engine 1 Pump load reduce, therefore ensure that Ccmp become upper limit capacity max when want increased torque portions.

In step S20, Ccmp is set as upper limit capacity max, and to the control of ECU output throttling valve and fuel injection Control request.That is, passing through throttle valve opening due in the state for starting again at fuel injection without implementation FC and controlling Increase motor torque with fuel injection control, therefore ensures that and want increased torque portion when Ccmp becomes upper limit capacity max Point.

In the step s 21, judge whether have passed through the stipulated time from Ccmp is set as upper limit capacity max, passing through S22 is entered step when the stipulated time, return step S18 in the case where in addition to this continues for Ccmp to be set as upper limited capacity Measure max.Here, the stipulated time refers to the reality of the compressor 4 when Ccmp is changed to upper limit capacity max from minimum capacity min Load torque can reach the time of load torque Tc (max) corresponding with upper limit capacity max.

In step S22, judge whether evaporator temperature Teva has reached temperature corresponding with temperature Tset in setting compartment It spends Teva (set), is judged as to have retrieved when evaporator temperature Teva has reached temperature Teva (set) Ccmp is set as minimum appearance The air conditioning performance loss during min is measured, S23 is entered step, when evaporator temperature Teva does not reach temperature Teva (set) Return step S18 continues for Ccmp to be set as upper limit capacity max.

In step S23, temperature Tset in the setting compartment set by occupant is read in.

In step s 24, setting target evaporator temperature Teva* corresponding with temperature Tset in setting compartment.

In step s 25, based on target evaporator temperature Teva* and detected evaporator temperature Teva, by Ccmp It is set as discharge capacity Ccmp (Teva*) corresponding with Teva*.In addition, step S23 to step S25 is common compressor displacement Measure control processing.

Fig. 5 is the timing diagram for indicating the compressor capacity control processing of embodiment 1.In addition, the timing diagram be from locking from What clutch 3a locking and driver's step on the accelerator started to carry out the state of driving traveling.

In moment t1, APO 0, when being judged as that vehicle velocity V SP is the speed than VSP1 high and is in inertia traveling state, Start FC.Meanwhile Teva is 5 DEG C or more, therefore Ccmp is set as upper limit capacity max, declines evaporator temperature ceaselessly.

Ccmp is set as Ccmp (3 DEG C), evaporator temperature is made to maintain 3 DEG C when Teva is lower than 5 DEG C in moment t2, To ensure cooling capacity.

In moment t3, when vehicle velocity V SP reaches VSP2, Ccmp is set as minimum capacity min, come the torque that lightens the load Tc.As a result, in order to avoid exceeding the deceleration upper limit, and the recovery vehicle velocity V SP1 of FC is changed to lower speed side VSP3.Section at the time of timing diagram shown in t4 to moment t5 becomes and can be extended by being set as minimum capacity min as a result, The section of FC.Further, since making evaporator temperature Teva sufficiently in the section of moment t1 to moment t3 reduces, therefore even if setting It can also ensure that cooling capacity for minimum capacity min.

In moment t5, when vehicle velocity V SP reaches VSP3, terminates FC, start again at fuel injection.

In moment t6, when evaporator temperature Teva becomes temperature Teva (set) corresponding with temperature Tset in setting compartment When above, therefore, to assure that refrigerating capacity, therefore carry out the releasing of minimum capacity min.Moreover, Ccmp is set as upper limit capacity Max, and start the counting of timer.At this point, the distribution of torque about load torque Tc, is with bearing from minimum capacity min All stable distribution of torque rises until lotus torque to the load torque of upper limit capacity max.Therefore, by along the torque point Cloth calculated load torque Tc can calculate the load torque value small with the deviation of actual load torque.In addition, by engine 1 When target engine torque Te* control, by throttle valve opening, fuel injection amount are controlled (TVO in Fig. 5, Fuel (Fuel) control), the increase part of load torque Tc can be suitably absorbed, can be avoided the destabilization of deceleration. In addition, the Tmax of Fig. 5 is dehumidifying value request (such as 13 DEG C), it is to be based on worrying gas when evaporator temperature Teva becomes more than it This point such as taste and the value set, expression will avoid Teva from becoming Tmax or more under any circumstance.

In moment t7, when timer count value is after the stipulated time and Teva reaches and set temperature phase in compartment When temperature Teva (set) answered, Ccmp is switched to Ccmp (con), and terminates throttle valve corresponding with upper limit capacity max and opens Degree control, fuel injection amount control, are changed into usual control.Like this, by the way that Ccmp is set as upper limit capacity max, Neng Goushi The stabilisation of existing distribution of torque, and restore refrigeration performance as early as possible, the extension for implementing FC next time can be reached rapidly Preparation.

As explained above, embodiment 1 plays following function and effect.

(1) Vehicular air-conditioning, which has, is driven by engine 1 and can change the 4 (idle call of compressor of discharge capacity Ccmp Compressor), when the control that Vehicular air-conditioning is carried out according to the state in compartment to adjust Ccmp, keep the output of engine 1 full The mesh of the aggregate value of foot request torque Td (driving torque of vehicle) and load torque Tc (driving torque of compressor) Motor torque Te* is marked, when by the fuel cut-off of engine 1, Ccmp is set as minimum capacity min, in step S17, According to the state in compartment to determine whether needing to change Ccmp from minimum capacity min, need being judged as from most Low capacity min rises when changing, and Ccmp is changed to from minimum capacity min to the upper limit capacity allowed in usual operating Max after the stipulated time, Ccmp is changed to from upper limit capacity max corresponding with the state in compartment from the change Discharge capacity Ccmp (con).

Therefore, the distribution of torque of load torque Tc can be made to stablize, the deceleration that can reduce for occupant is uncomfortable Sense.

(2) stipulated time be keep the cogging of load torque Tc (driving torque of compressor) stable when Between.

By passing through the stipulated time, the cogging as caused by the mechanicalness operating lag of compressor 4 can be made to stablize.

(3) in step S21, step S22, after the stipulated time and it is being judged as to have retrieved Ccmp is set as minimum appearance When air conditioning performance during measuring min is lost, Ccmp is changed to Ccmp (con) from upper limit capacity max.

Therefore, refrigeration performance can be restored as early as possible, the extended preparation for implementing FC next time can be reached rapidly.

(other embodiments)

More than, the present invention is illustrated based on embodiment, but specific structure is also possible to other structures.In embodiment 1, Show use belt type adjustable speed drive structure 3b as speed changer example but it is also possible to be other forms speed changer.Separately Outside, in embodiment 1, throttle valve control is requested in the case where releasing request there are min during implementing FC, but can also To be not issue request particularly if in the range for being not above the deceleration upper limit.