JP2699353B2 - Clutch control device for compressor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a clutch control device for a compressor,
In particular, it is applied to compressors such as air conditioners for vehicles.
To a clutch control device. (Prior art) Conventionally, for example, in compressors for air conditioners for vehicles
In the attached electromagnetic clutch control device,
For air conditioning, engage or disengage the electromagnetic clutch.
To transmit the power of the engine to the compressor, or
The engine power was cut off from the compressor. (Problems to be solved by the invention) However, in such a configuration, the electromagnetic
When the switch is engaged or disengaged, engagement noise or dissociation noise
This hindered the quietness of the vehicle. Also, electromagnetic
When the clutch is engaged, the compressor applies a load to the engine.
Due to the sudden addition, the engine speed drops rapidly and the vehicle
There is a problem that the vehicle is suddenly decelerated. On the other hand,
When the latch is disengaged, the load
The engine speed suddenly rises
This causes a problem that the vehicle is rapidly accelerated. Ma
Such a phenomenon is particularly remarkable in a small car. In response, the electromagnetic clutch can be
Buffered disengagement due to buffer engagement or sliding dissociation
To solve the above-mentioned problems.
It is. However, when the electromagnetic clutch is engaged or disengaged
Sometimes, if you always want to buffer or disengage,
The durability of the electromagnetic clutch must be designed unnecessarily high.
No. Therefore, the present invention has
In the compressor, buffer engagement control or release of the clutch is performed.
Dissociation control is now limited to certain conditions
It is intended to provide a clutch control device. (Means for Solving the Problems) In solving the above problems, according to the present invention, FIG.
As shown, the power of the engine 1 mounted on the vehicle is
2 which is transmitted to the compressor 2 and disconnected by disengagement from the compressor.
Means 3 and control to engage or disengage this clutch means
And a control means 4 for controlling the clutch means.
Whether the load on the engine is changing rapidly
A judgment means 5 for judging is provided, and the judgment means makes a sudden change in the load on the engine.
The control means determines that the
Control to instantly engage or disengage switch means
The determination means determines that the load on the engine is suddenly increased.
When it is determined that the state is changing, the control means
The clutch means is disengaged or disengaged through the sliding engagement state.
Control in the compressor, characterized in that
A latch control device is provided. (Operation and Effect) By configuring the present invention as described above, the determining means
However, as described above, the load on the engine changes rapidly
If it is determined that the clutch is not in the state,
The steps are controlled to instantaneously engage or disengage. This reduces the transmission of power from the engine to the compressor.
This is instantaneous due to the instantaneous engagement of the latch means.
Since the load on the gin does not change rapidly, the vehicle speed
It does not change rapidly. Further, as described above, the determination means determines whether the load on the engine is high.
When it is determined that
Means slipping or disengaging the clutch means via the engaged state.
Control so that they are separated. This reduces the transmission of power from the engine to the compressor.
This is done gradually in response to the sliding engagement of the latch means. this child
Is the amount of time the compressor acts on the engine
It means that the situation changes gradually. For this reason, the clutch means was instantaneously engaged or disengaged.
The sudden change in load on the engine that might occur
As a result, the vehicle speed can be reduced rapidly.
It can be maintained without causing drastic changes. Further, in the present invention, as described above,
The load on the engine changes drastically due to merging or dissociation
Only when it is in the state, the slip engagement control of the clutch means is performed.
The durability of the clutch means is unnecessary.
It is not necessary to be high. (Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 100 denotes a vehicle air conditioner.
The compressor 100 is shown in FIG.
Multi-plate clutch 200, electro-hydraulic mechanism 300 and belt mechanism
It is connected via 400 to the engine of the vehicle. compression
The machine 100 is provided with a cylindrical housing 110.
On both sides of the jing 110, both end brackets 120, 130,
Coaxial with each other and eccentric with respect to the axis of the housing 110
It is assembled. In such a case, both end brackets 12
The assembly of the housing 130 and the housing 130 is performed by the belt mechanism 40.
0 front bracket 401, electro-hydraulic mechanism 300 how
Zing 301, cylindrical housing 2 for hydraulic multi-plate clutch 200
01, end bracket 120, housing 110 and end bracket
Bolt 170 through racket 130 against rear cover 160
This is done by tightening. The rotating shaft 140 has bearings at its shaft ends 141 and 142.
To the end brackets 120 and 130 via
It is more rotatably supported, and this rotating shaft 140 has
A rotor 150 is supported in the housing 110. Ma
In addition, the rotor 150 includes a plurality of radial vanes 151 to 151.
Can slide in the radial direction, as shown in FIGS. 2 and 3.
Noh is fitted from the outside.
Parts 151 to 151 are formed on the outer peripheral surface of the rotor 150 and the housing 110.
Each variable pressure chamber is formed between the inner peripheral surface and the inner peripheral surface. In such cases,
The largest volume of each variable pressure chamber is
Evaporate through the suction hole (not shown) of racket 120
(Not shown), while each of the variable pressure chambers
The one with the minimum volume of
(Not shown) through the discharge chamber 111 attached to the housing 110
Is in communication with Thus, the rotor 150 is
Slide each radial vane 151-151 in the radial direction according to the rotation.
It rotates while moving, and the refrigerant (lubricating oil
Variable pressure through the suction hole of the end bracket 120
Inhalation into one of the chambers (with maximum volume), then allowed
The refrigerant is compressed as the volume of the variable pressure chamber decreases,
Through the discharge hole of the housing 110 as a compressed refrigerant, the discharge chamber 111
Discharge inside. The rear cover 160 is attached to the end cover via the annular adapter 160a.
This is mounted coaxially on the racket 130, this
Inside the rear cover 160, a communication chamber 161, a separation chamber 162, and a storage
A chamber 163 is formed. The communication room 161 has an end bracket
The discharge chamber 111 communicates with the discharge chamber 111 through the communication hole 131 of the
The compressed refrigerant in the exit chamber 111 is introduced through the communication hole 131 to separate the separation chamber.
162. The separation chamber 162 is compressed from the communication chamber 161.
When lubricating oil in the refrigerant is separated and stored in storage chamber 163
The remaining compressed refrigerant flows into a condenser (not shown).
To enter. The lubricating oil in the storage chamber 163 is
With the bottom wall communication hole 163a, and the rear cover 160 of the bolt 170
Screw part and end bracket 130, housing 110,
Each play space formed in the insertion part with the end bracket 120
To return to the storage chamber 201a of the housing 201
Has become. The hydraulic multi-plate clutch 200 has a rotating shaft 202,
The rotating shaft 202 is provided at its center via a seal 301a.
It is rotatably supported by the housing 301, and its inner end
At the shaft end 141 of the rotating shaft 140 via the bearing 141a.
It is rotatably supported. The rotating shaft 202 has an annular middle
A cylinder 203 having an empty portion is a left portion in the housing 201.
This cylinder is fitted coaxially by press fitting.
The hollow part of 203 introduces pressure oil generated in the housing 301.
The inner circumferential wall communication passage 203a of the cylinder 203 and the rotation shaft 202
Through the H-shaped communication passage 202a into the housing 301.
I have. In FIG. 2, reference numeral 203b denotes a thrust bearing.
Is shown. In the hollow part of the cylinder 203, there is a piston
2 and 3, the O-ring 204
a slidably fitted in the axial direction through a
The ton 204 passes through the inner peripheral wall communication passage 203a at the back wall 204c.
It is slid to the right in FIG. Koi
The spring 204b in the hollow part of the piston 204.
From the outside to the inner wall of the
Between the back wall 204c of the spring 204 and the stepped annular spline hub 205.
And urges the piston 204 to the left as shown in FIG.
(See FIGS. 2 and 3). Spline hub 205
Is located inside the housing 201 as shown in FIGS.
At the inner peripheral wall end of the cylinder 203 and the inner end of the rotary shaft 202.
The rotation shaft 202 is inserted between the snap ring 202b and the snap ring 202b.
The spline hub 205 is fitted coaxially
The spline portion 205a has three annular friction plates 206 to 206
(Only one friction plate 206 is shown in FIG. 3).
At the inner circumference, spline connection is possible to slide only in the axial direction.
Have been. Each friction plate 206-206 is a spline hub 205
So that it does not come off,
(Hereinafter referred to as friction surface) and held between the annular collar 205b
The inner peripheral portions and the collars of these friction plates 206 to 206 are provided.
-205b, annular wave springs 206a to 206a (FIG. 3)
Shows only a single wave spring)
The friction plates 206-206 and the collar 205b are loosely fitted to each other.
Energize to dissociate. The color 205b is
The line hub 205 and the snap fit on the spline hub 205
It is pinched between the pulling 205c. The rotating member 207 having a substantially U-shaped cross section is shown in FIGS. 2 and 3.
As shown, each of the inner peripheral claw portions 207a to 207a is
By engaging with the claw portions 141b to 141b of the shaft end portion 141,
The right side of the housing 201 shown in FIG.
To rotate coaxially with the cylinder 203 and piston 204
The rotary member 207 is rotatably supported by a shaft 140.
Three friction plates 208 to 208 (in FIG. 3, a single friction plate
208 only), but loosely fit coaxially to spline hub 205
Have been. Each of the friction plates 208 to 208 is a rotating part.
The bottom of the hollow part of the material 207 (hereinafter referred to as friction surface) and each friction
The friction plates 208-2 are alternately interposed between the plates 206-206.
The recesses 208b to 208b formed on the outer periphery of the
Slidable in the axial direction relative to the outer peripheral claw portions 207b to 207b of
Fitted. Then, the piston 204 is
And slide to the right in the figure, and the wave springs 206a to 206
6a through each friction plate 206, 208, 206, 208, 206, 208 while compressing
And presses the friction surface of the rotating member 205 to make frictional contact with the rotating member 2.
Transmission of torque from 02 to rotating member 140 is enabled. What
In FIG. 2, reference numeral 209 denotes a thrust bearing.
You. The electro-hydraulic mechanism 300 includes a trochoid pump 302 and a
Fitted in the bottom recess of the jing 301 via the O-ring 301c
It has a solenoid valve 300a, and the trochoid pump 302
According to the rotation of the rotating shaft 202, from the storage chamber 201a of the housing 201
Lubricant is supplied to the housing 3 through the communication passage 301b of the housing 301.
01 Pumped as pressure oil into the communication passage 202a of the pumping rotary shaft 202
Put out. The solenoid valve 300a is as shown in FIGS. 4 and 5.
And has a solenoid 303, and this solenoid 303
Is the central protrusion of the stator core 304 from below in its hollow part.
The part 304a is fitted, and through each O-ring 304b, 305a,
Coaxially sandwiched between theta core 304 and cover 305
I have. The cylindrical moving core 306 is provided with a solenoid 303
Slide coaxially into the hollow portion and the central annular portion 305b of the cover 305.
It is fitted so that it can move, and is within the large diameter of the moving core 306.
A coil spring 307 is provided in the hole 306a.
In the central recess 304a of the hole 304 and the upper end of the large-diameter inner hole 306a.
It is interposed between the locking plate 306b and the moving plate.
A 306 is biased toward the upper wall of the central annular portion 305b of the cover 305.
I do. In the small diameter inner hole portion 306c of the moving core 306, a cross section T
A valve body 308 is formed at the upper end of the small bore 306c.
To be displaceable in the axial direction to seat on the closed annular valve seat 306d
The rod portion 308a of the valve body 308 has a valve seat 306d.
To protrude above the upper end of the moving core 306
The cover 305 extends toward the upper wall. Also within the small diameter
In the hole 306c, a coil spring 309 is engaged with the locking plate 306b.
It is interposed and assembled between the valve body 308 and this
Il spring 309 biases valve body 308 toward valve seat 306d.
You. However, the spring constant of the coil spring 309 is
It is set smaller than that of the pulling 307. Then, the moving core 306 is moved as shown in FIG.
To the coil spring 307 under the demagnetization of the solenoid 303
The valve body 308 is urged upward to cover the rod 308a.
ー Abuts the upper wall of 305 against valve spring 30 against coil spring 309
When dissociated from 6d, small-diameter inner hole 306 of moving core 306
c is the valve seat 306d, each inlet 30 formed in the upper wall of the cover 305.
5c, 305c and the housing 301 through the communication passage 301d of the housing 301.
The inner wall of the small-diameter inner hole 306c
Outer perimeter of each communication hole 306e and small diameter inner hole 306c
An annular groove 306f perforated in each hole and each outlet 305d of the cover 305
Through the storage chamber 201a of the housing 201. Paraphrase
The solenoid valve 300a is opened by the demagnetization of the solenoid 303.
Then, the pressurized oil in the housing 301 passes through the communication passage 301d and the cover 305.
Within each inlet 305c, valve seat 306d of moving core 306, small diameter
Each of the hole 306c, the communication passage 306e, the annular groove 306f, and the cover 305
Discharge into the storage chamber 201a of the housing 201 through the outlet 305d
And pressurized oil in the cylinder 203
a, through the communication passage 202a of the rotating shaft 202 and the inside of the housing 301
As described above, from the communication passage 301d to each outlet 305d to the inside of the storage chamber 201a.
To be discharged. On the other hand, as shown in FIG.
Against the coil spring 307 under the excitation of the solenoid 303
The valve body 308 is sucked downward by the solenoid 303 and the rod
The coil sprung from the upper wall of 308a
When seated on the valve seat 306d by being biased by the ring 309,
The small-diameter inner hole 306c of the moving core 306 is
It is shut off from the inlet 305c and each outlet 305d. Paraphrase
For example, the solenoid valve 300a is closed by the excitation of the solenoid 303.
The pressure oil in the housing 301 and the pressure oil in the cylinder 203.
Blocks the inflow of the moving core 306 into the small-diameter inner hole 306c.
I do. The belt mechanism 400, as shown in FIG.
With a front bracket 401
The cutout 401 is formed by an annular flange 401a.
Coaxial with the rotating shaft 202 via the stopper 402a and the bearing 402b
And is attached to the housing 301.
You. The hub 403 has an annular shaft portion 403a formed at the outer end of the rotation shaft 202.
The hub 403 is fitted with a ring.
To the outer end of the rotating shaft 202 of the bolt 404 through the collar 404a.
It has been locked by tightening. V pulley 405
Is the front bracket 401 via both bearings 406,406
Is rotatably fitted coaxially to the cylindrical boss 401b of
The annular flange 405 of the V pulley 405
At the outer periphery of the annular flange 403b of the hub 403
Is fitted. The V pulley 405 is a V belt
(Not shown) connected to the engine. Ma
In FIG. 2, reference numeral 406a indicates a snap ring. Next, the solenoid 303 of the solenoid valve 300a is selectively excited.
The electrical circuit configuration for
500a detects the actual temperature at the outlet of the evaporator
Generated as a temperature detection signal. The vehicle speed sensor 500b is
Detect both actual vehicle speeds and sequentially at frequencies proportional to this
Generates a vehicle speed pulse. The rotation speed sensor 500c is
The actual rotational speed of the
A rotation speed pulse is generated sequentially. The operation switch 600
Operated when operating the air conditioner
Issue a signal. The A / D converter 700a receives a temperature detection signal from the temperature sensor 500a.
Signal to a digital temperature signal. Waveform shaper 700b
Is the waveform shaping of each vehicle speed pulse from the vehicle speed sensor 500b.
Generated sequentially as a speed shaping pulse. Waveform shaper 700c
The waveform of each rotation speed pulse from the rotation speed sensor 500c is shaped.
It is sequentially generated as a rotation speed shaping pulse. Microcon
Computer 800 is a computer program that
According to the flowchart shown, the operation switches 600, A-D
In cooperation with the converter 700a and the waveform shapers 700b and 700c,
Connected to the solenoid 303 during this execution.
An operation necessary for controlling the drive circuit 900 thus performed is performed. In addition,
Computer program, microcomputer 800 R
It is stored in the OM in advance. Also a microcomputer
800 is used to close the ignition switch IG of the vehicle.
From the battery B and from the operation switch 600
Execution of a computer program in response to an operation signal
Start. In this embodiment configured as described above, the ignition
When the engine starts with the switch IG closed,
The vehicle shall be started. At this time, the change of the vehicle
It is assumed that the speed device has been shifted to the first speed range.
Therefore, in such a state, the V pulley 405
Driven by the gin through the V-belt and rotated with the hub 403
Rotate, the rotating shaft 202 rotates, and the trochoid pump 302 accumulates
Lubricating oil from the chamber 201a into the housing 301 via the communication passage 301b
Is pumped and is in the open state with the communication passage 301d as pressure oil.
It is returned to the storage chamber 201a via the solenoid valve 300a. Therefore,
The multi-plate clutch 200 receives pressure oil from the trochoid pump 302.
The friction surface of the cylinder 204 and each friction plate 206-
206, 208 to 208 and the friction surface of the rotating member 207 are separated from each other.
To maintain. For this reason, the compressor 100 remains stopped.
You. At this stage, the user operates the operation switch 600.
When a signal is generated, the microcomputer 800
Execute the computer program according to the flowchart in the figure.
Start line at step 1000 and initialize at step 1010
At step 1020, and
Receiving a temperature signal. At this time, the air conditioner
Is operated from the operation switch 600 when the compressor 100 is stopped.
It starts working based on the signal. Thus, the digital temperature signal in step 1020
(Hereinafter referred to as digital temperature value T) is a predetermined temperature value
If more than 1 (℃) higher than To, microcomputer
800 determines “YES” in step 1030. However, (To
+1) is used as a criterion for determining whether the compressor 100 needs to be driven.
What is stored in advance in the ROM of the microcomputer 800
And T ≧ (To + 1) indicates the necessity of driving the compressor 100.
On the other hand, T <(To + 1) does not require driving the compressor 100
Represents sex. After that, the microcomputer 800
At step 1040, each vehicle speed shaping pulse from waveform shaper 700b
The vehicle speed (hereinafter referred to as vehicle speed V) based on the
And the rotation speed shaping parameters from the waveform shaper 700c.
Engine speed (hereinafter referred to as rotation speed N)
U) calculate the computer program step 1040
Proceed to Accordingly, the vehicle speed V and the rotation speed N in step 1040
Is in the buffer control area A (see FIG. 8),
The determination in step 1050 is “YES”. In such cases, loose
The impulse control range A is for keeping the multi-plate clutch 200 under sliding engagement.
The required area is represented by the coordinates on the horizontal and vertical axes in FIG.
On the surface, on both straight lines a and d, and on both straight lines a and d and the horizontal axis
Identification based on the following grounds by the shaded area surrounded by
Is done. However, each straight line a, b, c is the transmission of the vehicle.
NV at each shift to first speed, second speed, and third speed
The characteristics are shown respectively. The inventors of the present invention have reported that the power transmission from the engine to the compressor 100 is performed.
When the vehicle reaches or when the power is cut off
Alternatively, the actual cause of the
According to the test, such a problem was found to be
The lower the vehicle speed and the higher the engine speed,
It was recognized that it was easy to grow. So, the shift of the transmission
While changing the position to the first, second and third speeds,
The above problem is likely to occur in relation to the rotation speed N.
As a result of examining the area, the two straight lines a and d and the horizontal axis
The area required for sliding engagement control of the multi-plate clutch 200 is
Area (ie, buffer control area A). Note that
The collision control area A is in the form of a map or the like as buffer control area data.
Is stored in the ROM of the microcomputer 800 in advance.
You. Judgment of "YES" in step 1050 as described above
Thereafter, the microcomputer 800, in step 1060,
The duty required for intermittent excitation of solenoid 303 of solenoid valve 300a
Between the duty ratio Da and the first "YES" in step 1050
First du representing a proportional relationship between elapsed time t after determination and
Duty ratio Da according to elapsed time t based on the duty ratio data
And increase this duty ratio Da to the first output.
Generated as a force signal. However, the first duty ratio described above
The data is stored in the ROM of the microcomputer 800 in advance.
In the first duty ratio data,
The positive proportional constant corresponding to (Da / t) causes the above-mentioned problem.
It is stipulated not to be broken. Then, from the microcomputer 800,
When the first output signal is generated, the drive circuit 900 outputs the elapsed time
Solenoid with duty ratio data Da proportional to t
300 is intermittently excited, and the solenoid valve 300a
Closing intermittently while increasing the closing time with the
The amount of pressurized oil refluxed from the trochoid pump 302 to the storage chamber 201
Trochoid via each communication passage 202a, 203a while decreasing
Increase the amount of pressure oil supplied from pump 302 into cylinder 203
The piston 204 into the coil spring 204b and each wave spring 2
Slide against 06a. Then, the friction surface of the piston 204 and the friction plates 206 to 206
Between the friction plates 208 to 208 and the friction surface of the rotating member 207.
Each sliding friction contact force increases as the duty ratio Da increases.
Engine power piston 204 and friction plates 206-206
Increase the degree of transmission to each friction plate 208-208 and rotating member 207
I'll make it bigger. In other words, the multiple disc clutch 200 is
While increasing the frictional contact force according to the duty ratio Da.
The degree of transmission of engine power from the rotating shaft 202 to the rotating shaft 140
Increase. This means that the power transmission
As the rotation increases, the rotation shaft 140 increases toward the rotation speed of the rotation shaft 202.
It means that it rotates at high speed. Therefore, the compressor 100 responds to the rotational speed increase of the rotating shaft 140,
While sliding each radial vane 151-151 in the radial direction
Rotate the rotor 150 at an increased speed, and end from the evaporator.
Refrigerant into the variable pressure chamber through the suction hole of the bracket 120
Compresses the refrigerant while increasing the suction volume of
The discharge is performed into the discharge chamber 111 from the discharge hole of the plug 110. Then vomit
Refrigerant in the exit room 111 passes through the communication holes 131 of the end bracket 130.
Lubricating oil in the separation chamber 162 through the communication chamber of the rear cover 160
And flows into the capacitor. Meanwhile, isolated
The lubricating oil is stored in the storage chamber 163. In other words, “YES” in each of steps 1030 and 1050
Is determined, the duty ratio Da that increases with the elapsed time t is
Generated as the first output signal in step 1060,
Between the solenoid valve 300a during the circulation calculation of 1080 and 1090
Intermittent closing control increases the closing time according to the duty ratio Da.
Trochoid to multi-disc clutch 200 performed under great
The amount of pressure oil supplied from the pump 302 depends on the duty ratio Da.
Power by the sliding friction force of the multi-plate clutch 200.
The degree of transmission increases as the supply pressure oil amount increases,
The refrigerant discharge amount of 100 is sequentially increased. Because of this,
The effect of the compressor 100 as a load on the compressor
Duty ratio Da, and as a result,
Without a sudden decrease in engine speed
Without increasing the durability of the latch 200 unnecessarily,
The vehicle speed of the vehicle can be maintained as it is. In such a state, the determination in step 1090
Is set to “YES”, the microcomputer 800
In step 1100, the vehicle speed V and
And the rotation speed N are calculated. This means that the evaporator
Compressor 200 shuts down due to outlet temperature drop below To
Means to calculate V and N based on the judgment that
You. Thus, the determination in step 1110 is
If the answer is “YES” as in the case of 50,
800 turns off the first output signal in step 1120
The duty ratio Db (duty ratio Da
Response) and after the determination of “YES” in step 1110
A second duty ratio data representing an inversely proportional relationship with time ta
The duty ratio Db according to the elapsed time ta based on the data
And this duty ratio Db is used as the second output signal.
Occur. However, the second duty ratio data described above is
What is stored in advance in the ROM of the microcomputer 800
The inverse proportional constant in the second duty ratio data is
The proportionality constant is substantially determined similarly. Then, from the microcomputer 800,
When the second output signal occurs along with the disappearance of the first output signal,
The drive circuit 900 has a duty ratio D that is inversely proportional to the elapsed time ta.
b to excite the solenoid 303 intermittently, and the solenoid valve 300a
But intermittent while reducing the closing time with the duty ratio Db
And the pressure from the trochoid pump 302 to the storage chamber 201 is closed.
From the trochoid pump 302 while increasing the amount of oil reflux
Reduce the amount of pressurized oil supplied into the cylinder 203 to
04 by the coil spring 204b and each wave spring 206a.
And slide it into the cylinder 203. Then, the friction surface of the piston 204 and the friction plates 206 to 206
Between the friction plates 208 to 208 and the friction surface of the rotating member 207.
Each sliding friction contact force decreases as the duty ratio Db decreases.
Engine power piston 204 and friction plates 206-206
Reduce the degree of transmission to each friction plate 208-208 and rotating member 207
I will reduce it. In other words, the multiple disc clutch 200 is
While reducing the frictional contact force according to the duty ratio Db.
The degree of transmission of engine power from the rotating shaft 202 to the rotating shaft 140
Decrease it. This means that the power transmission
Check that the rotation speed of the rotating shaft 140 decreases as the
means. Therefore, the compressor 100 responds to the reduced rotation of the rotating shaft 140,
While sliding each radial vane 151-151 in the radial direction
Rotate the rotor 150 at a reduced speed and set the variable pressure from the evaporator.
While reducing the amount of refrigerant sucked into the power chamber,
It is compressed and discharged into the discharge chamber 111. After that, discharge as described above.
The refrigerant in the outlet 111 is separated from the lubricating oil and
Inflow. In other words, “YES” in steps 1090 and 1110
Is determined, the duty ratio Db that decreases according to the elapsed time ta is
Generated in step 1120 as the second output signal, the solenoid valve
Intermittent closing control of 300a closes according to duty ratio Db
The time required to reduce the time
The amount of pressure oil supplied from the locoid pump 302 is changed to the duty ratio Db.
In accordance with the sliding friction force of the multi-plate clutch 200.
Power transmission decreases as the supply pressure oil volume decreases
Then, the compressor 100 sequentially reduces the refrigerant discharge amount. others
Therefore, the effect of the load of the compressor 100 on the engine
It will decrease with the duty ratio Db over time,
As a result, without a sudden increase in engine speed
And to increase the durability of the multi-plate clutch 200 more than necessary.
Therefore, the vehicle speed of the vehicle can be maintained as it is. If the determination in step 1050 is “NO”,
In this case, the microcomputer 800 proceeds to step 1070.
And the duty ratio Da = 100 (%) as the third output signal
And the driving circuit 900 responds to this with Da = 100 (%).
The solenoid 303 is excited to keep the solenoid valve 300a closed.
Carry. Therefore, the total pressure oil from the trochoid pump 302
Is supplied into the cylinder 203 and the multi-plate clutch 200 slips.
Completely engaged without rotating, rotating the rotation speed of the rotating shaft 140
Jump up to that of axis 202. This means that the compressor 100
It is intended to discharge refrigerant at the rotation speed of the rotating shaft 140.
To taste. In addition, the determination in step 11110 is “NO”.
If this happens, the microcomputer 800 goes to step 1
At 130, the third output signal is extinguished, and the
The valve 300a is kept open. Because of this,
Switch 200 is immediately dissociated and the rotation speed of the rotating shaft 140 is rapidly reduced.
Let In these cases, V and N are out of the buffer control area A.
As a result, the engine speed suddenly drops or rises
That is, the vehicle does not suddenly decelerate or ascend. In the above operation, the transmission is shifted to the first speed.
The example described above was explained, but without being limited to this,
The same operation is performed even if the speed device is shifted to the second or third speed.
And its effects can be achieved. In implementing the present invention, the multi-plate clutch 200
Without limitation, for example, electromagnetic powder clutch, electromagnetic
Use a single-plate clutch or an electromagnetic multi-plate clutch to implement
You may. In the practice of the present invention, for example, 30 km / h or less
Vehicle speed, transmission shift position and vehicle speed, or transmission
Buffer control range depending on the shift position of the
A may be specified, or the slot of the vehicle may be specified.
The buffer control range B (FIG. 9)
(Refer to the hatched area).
Substantially the same effect can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram corresponding to the structure of the invention described in the claims, FIG. 2 is a sectional view of a compressor, a multi-plate clutch, an electro-hydraulic mechanism and a belt mechanism, and FIG. FIG. 4 is an exploded perspective view of each component of the multi-plate clutch and the compressor, FIG. 4 is a cross-sectional view showing an opened state of the solenoid valve, FIG. 5 is a cross-sectional view showing a closed state of the solenoid valve, and FIG. FIG. 7 is a block diagram showing an electric circuit for the solenoid of the solenoid valve, FIG. 7 is a flowchart showing the operation of the microcomputer in FIG. 6, and FIG. 8 shows a buffer control area A based on the relationship between the rotation speed N and the vehicle speed V. Figure,
FIG. 9 is a diagram showing a buffer control range B based on the relationship between the opening of the throttle valve and the vehicle speed V. Description of reference numerals 100: compressor, 200: multi-plate clutch, 300: electric
Hydraulic mechanism, 300a ... Solenoid valve, 302 ... Trochoid pump, 400 ... Belt mechanism, 500a ... Temperature sensor, 500b ...
... Vehicle speed sensor, 500c ... Rotation speed sensor, 800 ... Microcomputer, 900 ... Drive circuit.

Claims (1)

(57) [Claims] A clutch control device comprising: clutch means for transmitting the power of an engine mounted on a vehicle to a compressor by engagement and disconnecting from the compressor by disengagement; and control means for controlling the clutch means to be engaged or disengaged. In the above, there is provided a judgment means for judging whether or not the load on the engine accompanying the instantaneous engagement or disengagement of the clutch means is abruptly changed. When the control means determines that the state is not in a state of changing, the control means controls the clutch means to be instantaneously engaged or disengaged, and the determination means determines that the load on the engine changes rapidly. When it is determined that there is a clutch, the control means controls the clutch means to engage or disengage through a sliding engagement state. Clutch control device.