CN102937150B - Hybrid vehicle torque limiting clutch hydraulic control system and controlling method thereof - Google Patents

Hybrid vehicle torque limiting clutch hydraulic control system and controlling method thereof Download PDF

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Publication number
CN102937150B
CN102937150B CN201210447549.6A CN201210447549A CN102937150B CN 102937150 B CN102937150 B CN 102937150B CN 201210447549 A CN201210447549 A CN 201210447549A CN 102937150 B CN102937150 B CN 102937150B
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China
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oil
switch valve
hydraulic
accumulator
valve
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CN201210447549.6A
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Chinese (zh)
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CN102937150A (en
Inventor
陈振坡
杨阳
袁婕
刘明锜
苏岭
杨洋
李浚叶
Original Assignee
重庆长安汽车股份有限公司
重庆长安新能源汽车有限公司
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Priority to CN201210447549.6A priority Critical patent/CN102937150B/en
Publication of CN102937150A publication Critical patent/CN102937150A/en
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Abstract

The invention provides a kind of hybrid vehicle torque limiting clutch hydraulic control system, comprise oil hydraulic cylinder, oil hydraulic pump, motor, controller and hydraulic oil container, it also comprises: the accumulator be communicated with oil hydraulic pump; Be communicated with accumulator and oil hydraulic cylinder, and lay respectively at the first switch valve, second switch valve and the oil return switch valve on different bye-pass; Be arranged on the reduction valve on any one place bye-pass in the first switch valve and second switch valve; Be communicated with the connecting port of accumulator.In the present invention, by arranging accumulator, small volume, fractional electric motor can be adopted, reducing the impact that heat causes; Multiple bye-pass is communicated with accumulator and oil hydraulic cylinder, avoids and impacts normal traveling; Reduction valve is set, makes engine start more steady, improve car load power character.Therefore, invention increases the usability of hybrid vehicle in the operating mode of city.Present invention also offers a kind of controlling method of hybrid vehicle torque limiting clutch hydraulic control system.

Description

Hybrid vehicle torque limiting clutch hydraulic control system and controlling method thereof
Technical field
The present invention relates to Development of HEV Technology field, more particularly, relate to a kind of hybrid vehicle torque limiting clutch hydraulic control system, the invention still further relates to the controlling method of above-mentioned hybrid vehicle torque limiting clutch hydraulic control system.
Background technique
Torque limiting clutch is the important transmission device in severe hybrid power automobile power coupling mechanism, and its setting position is between motor and motor, and three is coaxial setting.
Severe hybrid power automobile has all functions of idling start and stop, pure motor driving, parallel drive, the advance mixed power systems such as middle ato unit, Brake energy recovery, and it can improve whole vehicle power performance and the economy performance by the switching of above various pattern.When hybrid vehicle is when creeping with low speed driving, can kills engine by pure motorized motions and reducing oil consumption; When the pure motor-operated running state of hybrid vehicle turns to acceleration or climbing, if motor cannot meet vehicle acceleration or the driving force required for climbing, ato unit is just needed jointly to drive, now just need to control torque limiting clutch, motor and motor is made to be in jointing state, realize common driving, with the driving requirements of satisfied different road conditions.
In the prior art, traditional torque limiting clutch control system adopts oil hydraulic pump directly to oil hydraulic cylinder voltage supply, namely the hydraulic oil that oil hydraulic pump exports acts directly on the piston of oil hydraulic cylinder, move to promote piston push rod, and then make the friction plate be connected with piston push rod engage and compress, realize the object of torque limiting clutch transmitting torque.But, because hybrid vehicle is used in start and stop city operating mode frequently mostly, so the start stop operation of motor and all very frequent by the operation of torque limiting clutch start and stop motor in torque limiting clutch control system, this just causes this kind of implementation and there is following shortcoming: due to directly to torque limiting clutch voltage supply, so need the engaging time of strict solenoidoperated cluthes, therefore high power motor is just needed to drive hydraulic control system, and high power motor volume is larger, take up room larger, and heating value during frequent start-stop is also larger, not only be not easy to install, also can affect the working life to hydraulic control system because of heat problem, when extraneous factor causes that needed for motor, starting torque promptly changes, may occur by the situation of torque limiting clutch ato unit, the normal traveling of hybrid vehicle cannot being affected because of underpressure, the mode of direct voltage supply cannot accomplish likely to cause excessive shock the accurate control to torque limiting clutch oil hydraulic cylinder internal pressure, affect the power character of car load to the normal traveling of vehicle when engine start.
Therefore, above-mentioned shortcoming causes larger impact to the normal traveling of hybrid vehicle in the operating mode of city, is unfavorable for that hybrid vehicle normally uses in city.
In sum, how providing a kind of hybrid vehicle torque limiting clutch hydraulic control system, to realize improving the usability of hybrid vehicle in the operating mode of city, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of hybrid vehicle torque limiting clutch hydraulic control system, improve the usability of hybrid vehicle in the operating mode of city.
In order to achieve the above object, the invention provides following technological scheme:
A kind of hybrid vehicle torque limiting clutch hydraulic control system, comprise oil hydraulic cylinder, oil hydraulic pump, the motor of the described hydraulic pump works of drive, the controller controlling described motor start and stop and the hydraulic oil container be communicated with described oil hydraulic pump filler opening, it also comprises:
The accumulator be communicated with the oil outlet of described oil hydraulic pump;
All be communicated with from described accumulator and lay respectively at the first switch valve, second switch valve and the oil return switch valve on different bye-pass, described oil return switch valve place bye-pass is communicated with described hydraulic oil container;
Be arranged on the reduction valve on the bye-pass at any one place in described first switch valve and second switch valve;
Described first switch valve, second switch valve are all communicated with described oil hydraulic cylinder with the bye-pass at oil return switch valve place;
The connecting port to be connected external hydraulic power is communicated with described accumulator.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, also comprise and detect pressure in described oil hydraulic cylinder, and the pressure signal detected is sent to the sensor of described controller.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, also comprise the pressure detecting hydraulic oil in described accumulator, and the pressure signal detected is sent to multiple pressure relayes of described controller.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, also comprise the relief valve being communicated with described accumulator and described hydraulic oil container, and the oil pressure relief value of described relief valve is in the numerical difference of the activation pressure value of multiple described pressure relay in scope, wherein, described accumulator is gas-filled type accumulator, and described relief valve is direct-acting overflow valve.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, also comprise: be arranged on the filter between described oil hydraulic pump and described hydraulic oil container; Be arranged on the first one-way valve between described connecting port and described accumulator; Be arranged on second one-way valve at the oil outlet place of described oil hydraulic pump.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, described first switch valve, second switch valve and oil return switch valve are normally closed electromagnetic switch valve, and described reduction valve is direct acting pressure or proportional pressure-reducing valve.
Preferably, in above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, described oil hydraulic cylinder comprises:
The piston push rod of movement under the promotion of hydraulic oil;
Be connected with described piston push rod and realize the friction plate that moment of torsion transmits;
Drive the return spring that described piston push rod resets.
A controlling method for hybrid vehicle torque limiting clutch hydraulic control system, be applicable to the hybrid vehicle torque limiting clutch hydraulic control system described in above-mentioned any one, it comprises the following steps:
1), after described controller receives and engages signal, control described motor and open and drive described hydraulic pump works, the hydraulic oil in described hydraulic oil container is entered in described accumulator to maintain the pressure reaching job requirement in described accumulator;
2) described controller controls described oil return switch valve and closes, and controls to be positioned at described first switch valve on same bye-pass with described reduction valve or second switch valve is opened, and another one is closed;
3) described accumulator output hydraulic pressure oil under the effect of internal pressure, the bye-pass of hydraulic oil through being provided with described reduction valve enters into described oil hydraulic cylinder;
4) hydraulic oil drives described hydraulic cylinder works to enable torque limiting clutch transmitting torque;
5) after described controller receives separation signal, described controller controls described first switch valve and second switch valve cuts out, described oil return switch valve is opened, hydraulic oil flows out from described oil hydraulic cylinder, and enter into described hydraulic oil container through described oil return switch valve, described oil hydraulic cylinder quits work, and torque limiting clutch stops transmitting torque.
Preferably, in the controlling method of above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, further comprising the steps of before described step 1):
After described controller receives joint signal, first the pressure in described accumulator is detected, and testing signal is sent to described controller, if pressure is within the scope of job requirement, then described controller does not start described motor, if pressure does not reach the scope of job requirement, then carry out above-mentioned steps 1) in operation.
Preferably, in the controlling method of above-mentioned hybrid vehicle torque limiting clutch hydraulic control system, further comprising the steps of between described step 3) and step 4):
When the pressure of the hydraulic oil entering into described oil hydraulic cylinder is not enough to support that described oil hydraulic cylinder normally works, described controller controls to be in the described second switch valve not being positioned at same bye-pass with described reduction valve of closed condition or the first switch valve is opened, and control to be in opening state be positioned at described first switch valve of same bye-pass with described reduction valve or described second switch valve cuts out, make the hydraulic oil in described accumulator directly enter into described oil hydraulic cylinder without described reduction valve.
In hybrid vehicle torque limiting clutch hydraulic control system provided by the invention, comprise oil hydraulic cylinder, oil hydraulic pump, the motor of drive hydraulic pump works, the controller controlling motor start and stop and the hydraulic oil container be communicated with oil hydraulic pump filler opening, it also comprises: the accumulator be communicated with oil hydraulic pump oil outlet; All be communicated with from accumulator and lay respectively at the first switch valve, second switch valve and the oil return switch valve on different bye-pass, oil return switch valve place bye-pass is communicated with hydraulic oil container; Be arranged on the reduction valve on the bye-pass at any one place in the first switch valve and second switch valve; First switch valve, second switch valve are all communicated with oil hydraulic cylinder with the bye-pass at oil return switch valve place; The connecting port to be connected external hydraulic power is communicated with accumulator.
After controller receives and engages signal, control motor works, motor drives hydraulic pump works, hydraulic oil in hydraulic oil container is delivered in accumulator, in addition, by connecting port, accumulator can also be communicated with to be filled with hydraulic oil in accumulator with external hydraulic power, then controller controls to be positioned at the first switch valve on same bye-pass with reduction valve or second switch valve is opened, be not positioned at second switch valve on same bye-pass or the first switch valve and oil return switch valve to close with reduction valve, the bye-pass making hydraulic oil pass through to have reduction valve enters into oil hydraulic cylinder, oil hydraulic cylinder is worked under the effect through post-decompression hydraulic oil, torque limiting clutch is made to start transmitting torque, after controller receives separation signal, controller controls the first switch valve and second switch valve all cuts out, and oil return switch valve is opened, and the hydraulic oil in oil hydraulic cylinder flow in hydraulic oil container by oil return switch valve, oil hydraulic cylinder quits work, and torque limiting clutch stops transmitting torque.
Hybrid vehicle torque limiting clutch hydraulic control system provided by the invention, by arranging accumulator, the pressure entering into oil hydraulic cylinder hydraulic oil can be remained in the pressure range of job requirement, compared with prior art, drive oil hydraulic pump to provide pressure without the need to using high power motor, so just can adopt the heat that small volume, fractional electric motor produce because of frequent start-stop to reduce motor, thus reduce the impact that heat causes, extend working life, be also convenient to install; Multiple bye-pass is communicated with the set-up mode of accumulator and oil hydraulic cylinder, hydraulic oil can also be made directly to enter into oil hydraulic cylinder without reduction valve decompression, even if when extraneous factor causes that needed for motor, starting torque promptly changes, also there will not be and by the situation of torque limiting clutch ato unit, cannot avoid and the normal traveling of hybrid vehicle is impacted because of underpressure; Enter oil hydraulic cylinder by what arrange that reduction valve makes that hydraulic oil can be mild, compared with prior art, make torque limiting clutch can transmitting torque gently, engine start be more steady, improves the power character of car load.
Therefore, hybrid vehicle torque limiting clutch hydraulic control system provided by the invention improves the usability of hybrid vehicle in the operating mode of city.
Present invention also offers a kind of controlling method of hybrid vehicle torque limiting clutch hydraulic control system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of the hybrid vehicle torque limiting clutch hydraulic control system that Fig. 1 provides for the embodiment of the present invention;
The flow chart of the controlling method of the hybrid vehicle torque limiting clutch hydraulic control system that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the operational flowchart of the controlling method of hybrid vehicle torque limiting clutch hydraulic control system.
In above Fig. 1-Fig. 3:
Motor 1, oil hydraulic pump 2, filter 3, hydraulic oil container 4, second one-way valve 5, relief valve 6, first switch valve 7, reduction valve 8, oil return switch valve 9, sensor 10, oil hydraulic cylinder 11, friction plate 11a, return spring 11b, piston push rod 11c, second switch valve 12, accumulator 13, first one-way valve 14, connecting port 15, pressure relay 16, controller 17.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment for the present invention is described, but should be appreciated that these describe just in order to further illustrate the features and advantages of the present invention, instead of limiting to the claimed invention.
The invention provides a kind of hybrid vehicle torque limiting clutch hydraulic control system, improve the usability of hybrid vehicle in the operating mode of city.
Below by engaging the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the hybrid vehicle torque limiting clutch hydraulic control system that the embodiment of the present invention provides, comprise oil hydraulic cylinder 11, oil hydraulic pump 2, the motor 1 driving oil hydraulic pump 2 to work, the controller 17 controlling motor 1 start and stop and the hydraulic oil container 4 be communicated with oil hydraulic pump 2 filler opening, it also comprises:
The accumulator 13 be communicated with the oil outlet of oil hydraulic pump 2;
All be communicated with from accumulator 13 and lay respectively at the first switch valve 7, second switch valve 12 and the oil return switch valve 9 on different bye-pass, oil return switch valve 9 place bye-pass is communicated with hydraulic oil container 4;
Be arranged on the reduction valve 8 on the bye-pass at any one place in both the first switch valve 7 and second switch valve 12;
First switch valve 7, second switch valve 12 are all communicated with oil hydraulic cylinder 11 with the bye-pass at oil return switch valve 9 place;
The connecting port 15 being connected external hydraulic power is communicated with accumulator 13.In the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, except being driven oil hydraulic pump 2 to except injection liquid force feed in accumulator 13 by motor 1, can also be connected with the transmission fluid pressing system equal pressure source of hybrid vehicle by connecting port 15, injection liquid force feed in accumulator 13.
What wherein Fig. 1 represented is schematic diagram reduction valve 8 and the first switch valve 7 are arranged on same bye-pass, and certainly, reduction valve 8 can also be arranged on same bye-pass with second switch valve 12.
In the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, after controller 17 receives and engages signal, control motor 1 to work, motor 1 drives oil hydraulic pump 2 to work, hydraulic oil in hydraulic oil container 4 is delivered in accumulator 13, in addition, by connecting port 15, accumulator 13 can also be communicated with to be filled with hydraulic oil in accumulator 13 with external hydraulic power, then controller 17 controls to be positioned at the first switch valve 7 on same bye-pass with reduction valve 8 or second switch valve 12 is opened, be not positioned at second switch valve 12 on same bye-pass or the first switch valve 7 and oil return switch valve 9 to close with reduction valve 8, the bye-pass making hydraulic oil pass through to have reduction valve 8 enters into oil hydraulic cylinder 11, oil hydraulic cylinder 11 is worked under the effect through post-decompression hydraulic oil, torque limiting clutch is made to start transmitting torque, after controller 17 receives separation signal, controller 17 controls the first switch valve 7 and second switch valve 12 all cuts out, oil return switch valve 9 is opened, hydraulic oil in oil hydraulic cylinder 11 flow in hydraulic oil container 4 by oil return switch valve 9, oil hydraulic cylinder 11 quits work, and torque limiting clutch stops transmitting torque.
The hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, by arranging accumulator 13, the pressure entering into oil hydraulic cylinder 11 hydraulic oil can be remained in the pressure range of job requirement, compared with prior art, drive oil hydraulic pump 2 to provide pressure without the need to using high power motor, so just can adopt the heat that small volume, fractional electric motor produce because of frequent start-stop to reduce motor 1, thus reduce the impact that heat causes, extend working life, be also convenient to install; Multiple bye-pass is communicated with the set-up mode of accumulator 13 and oil hydraulic cylinder 11, hydraulic oil can also be made directly to enter into oil hydraulic cylinder 11 without reduction valve 8 reduces pressure, even if when extraneous factor (ambient temperature is too low) causes that needed for motor, starting torque promptly changes, also there will not be and by the situation of torque limiting clutch ato unit, cannot avoid and the normal traveling of hybrid vehicle is impacted because of underpressure; Enter oil hydraulic cylinder 11 by what arrange that reduction valve 8 makes that hydraulic oil can be mild, compared with prior art, make torque limiting clutch can transmitting torque gently, engine start be more steady, improves the power character of car load.
Therefore, the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides improves the usability of hybrid vehicle in the operating mode of city.
In order to optimize technique scheme further, in the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, also comprise the pressure detecting hydraulic oil in oil hydraulic cylinder 11, and the pressure signal detected is sent to the sensor 10 of controller 17, as shown in Figure 1.Sensor 10 is set to detect the pressure in oil hydraulic cylinder 11, and pressure signal is sent to controller 17, make the force value that controller 17 can obtain in oil hydraulic cylinder 11 at any time, accurately, so that controller 17 according to the force value recorded to the unlatching of the first switch valve 7, second switch valve 12 and oil return switch valve 9, closedly to control more accurately, and then change the oil inlet quantity of hydraulic oil in oil hydraulic cylinder 11, make the pressure controllability in oil hydraulic cylinder 11 higher, improve the mild controllability in engine starting process.
Further, in the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, also comprise the pressure detecting hydraulic oil in accumulator 13, and the pressure signal detected is sent to multiple pressure relayes 16 of controller 17.In the present embodiment, pressure relay 16 is preferably two, as shown in Figure 1.Wherein, the activation pressure value of these two pressure relayes 16 is different, wherein the activation pressure value of one setting is not less than and meets the minimal pressure force value that torque limiting clutch engages hydraulic oil in required accumulator 13 completely, in the present embodiment this activation pressure value is called minimum activation pressure value, the activation pressure value of another one setting is less than the maximal pressure force value of accumulator 13, in the present embodiment, this activation pressure value is called the highest activation pressure value.Two pressure relayes 16 can be the pressure relay 16 of same model, require its highly sensitive and good stability; Because pressure relay 16 is manual tune, and an activation pressure value can only be regulated, therefore need to arrange two pressure relayes 16, to set up different activation pressure values, the minimum activation pressure value of setting up need meet hydraulic oil in accumulator 13 after reduction valve 8 reduces pressure, and still can reach the minimal pressure force value of torque limiting clutch ato unit; The highest activation pressure value of setting up is no more than the specified pressure of accumulator 13, and the highest activation pressure value preferably set is the specified pressure of accumulator 13.
Before accumulator 13 output hydraulic pressure oil provides pressure, first detected by the force value in these two pressure relayes 16 pairs of accumulators 13, if the force value in accumulator 13 is less than minimum activation pressure value, then accumulator 13 cannot provide enough pressure that oil hydraulic cylinder 11 is normally worked for oil hydraulic cylinder 11, so just need controller 17 after receiving this trigger signal, control motor 1 to run, drive oil hydraulic pump 2 to injection liquid force feed in accumulator 13, until accumulator 13 internal pressure value reaches maximum activation pressure value, then control motor 1 out of service.If when the force value in accumulator 13 is between minimum activation pressure value and the highest activation pressure value, then controller 17 not actuating motor 1, accumulator 13 carries out subsequent operation.
In the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, also comprise the relief valve 6 being communicated with accumulator 13 and hydraulic oil container 4, and the oil pressure relief value of relief valve 6 is in the numerical difference of the activation pressure value of multiple pressure relay 16 in scope.Relief valve 6 is set between accumulator 13 with hydraulic oil container 4 to be communicated with accumulator 13 and hydraulic oil container 4; and the oil pressure relief value of relief valve 6 is between minimum activation pressure value and the highest activation pressure value; when the pressure that this makes it possible in accumulator 13 exceedes oil pressure relief value; relief valve 6 can be made to open; to be communicated with accumulator 13 and hydraulic oil container 4; make hydraulic oil unnecessary in accumulator 13 flow in hydraulic oil container 4, to reach protection accumulator 13, avoid the object that accumulator 13 suffers damage.Wherein, preferably, accumulator 13 is gas-filled type accumulator 13, and relief valve 6 is direct-acting overflow valve 6, and certain accumulator 13 can also be the accumulator of other types, such as spring loaded accumulator, and relief valve 6 also can be the relief valve of other types.
In addition, in the transmission fluid pressing system equal pressure source of hybrid vehicle by connecting port 15 in accumulator 13 during injection liquid force feed, oil pressure relief value due to relief valve 6 is between minimum activation pressure value and the highest activation pressure value, if the hydraulic oil provided is higher than accumulator 13 maximum allowble pressure value, relief valve 6 can open to be entered in hydraulic oil container 4 by unnecessary hydraulic oil.
In the hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, also comprise: be arranged on the filter 3 between oil hydraulic pump 2 and hydraulic oil container 4; Be arranged on the first one-way valve 14 between connecting port 15 and accumulator 13; Be arranged on second one-way valve 5 at the oil outlet place of oil hydraulic pump 2.The object arranging the first one-way valve 14 and the second one-way valve 5 is exactly to prevent hydraulic oil from refluxing.
Preferably, the first switch valve 7, second switch valve 12 and oil return switch valve 9 are normally closed electromagnetic switch valve, and reduction valve 8 is direct acting pressure or proportional pressure-reducing valve.The advantage of normally closed electromagnetic switch valve is for also can open main valve without pressure, and low voltage difference flow is large, and applied widely etc., it can meet the job requirement of the present embodiment preferably.Certainly, under the prerequisite that the hybrid vehicle torque limiting clutch hydraulic control system not affecting the present embodiment and provide normally works, first switch valve 7, second switch valve 12 and oil return switch valve 9 can also be the switch valve of other types, and reduction valve 8 also can be the reduction valve of other types.
Concrete, oil hydraulic cylinder 11 comprises: the piston push rod 11c of movement under the promotion of hydraulic oil; Be connected with piston push rod 11c and realize the friction plate 11a that moment of torsion transmits; The return spring 11b that driven plunger push rod 11c resets, as shown in Figure 1.After hydraulic oil enters into oil hydraulic cylinder 11, the pressure of hydraulic oil overcomes the pretightening force of return spring 11b in frictional force in oil hydraulic cylinder 11 and torque limiting clutch, promote piston push rod 11c to move, the friction plate 11a be arranged on piston push rod 11c moves with piston push rod 11c, finally make friction plate 11a engage and compress, realize the object of torque limiting clutch transmitting torque; After moment of torsion transmission completes, controller 17 controls the first switch valve 7 and second switch valve 12 cuts out, control oil return switch valve 9 to open simultaneously, hydraulic oil no longer driven plunger push rod 11c moves, piston push rod 11c is back to initial position under the effect of return spring 11b, and the friction plate 11a of torque limiting clutch is separated.
As described in Figure 2, the present embodiment additionally provides a kind of controlling method of hybrid vehicle torque limiting clutch hydraulic control system, and be applicable to hybrid vehicle torque limiting clutch hydraulic control system described above, it comprises the following steps:
After S101, controller 17 receive and engage signal, control motor 1 and open and drive oil hydraulic pump 2 to work, the hydraulic oil in hydraulic oil container 4 is entered in accumulator 13 to maintain the pressure reaching job requirement in accumulator 13;
S102, controller 17 control oil return switch valve 9 and close, and control to be positioned at the first switch valve 7 on same bye-pass with reduction valve 8 or second switch valve 12 is opened, and another one is closed;
S103, accumulator 13 be output hydraulic pressure oil under the effect of internal pressure, and the bye-pass of hydraulic oil through being provided with reduction valve 8 enters into oil hydraulic cylinder 11;
S104, hydraulic oil drive oil hydraulic cylinder 11 to work to enable torque limiting clutch transmitting torque;
After S105, controller 17 receive separation signal, controller 17 controls the first switch valve 7 and second switch valve 12 cuts out, oil return switch valve 9 is opened, hydraulic oil flows out from oil hydraulic cylinder 11, and enter into hydraulic oil container 4 through oil return switch valve 9, oil hydraulic cylinder 11 quits work, and torque limiting clutch stops transmitting torque.
Concrete, in the controlling method of a kind of hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, further comprising the steps of before step S101:
After controller 17 receives joint signal, first detected by the pressure in pressure relay 16 pairs of accumulators 13, and testing signal is sent to controller 17, if pressure is within the scope of job requirement, then controller 17 not actuating motor 1, if pressure does not reach the scope of job requirement, then carry out the operation in above-mentioned steps S101.
Further, in the controlling method of a kind of hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides, further comprising the steps of between step S103 and step S104:
When the pressure of the hydraulic oil entering into oil hydraulic cylinder 11 is not enough to support that oil hydraulic cylinder 11 normally works, controller 17 controls to be in the second switch valve 12 of closed condition or the first switch valve 7 is opened, and makes the hydraulic oil in accumulator 13 directly enter into oil hydraulic cylinder 11 without reduction valve 8.
When extraneous specific factor (ambient temperature is too low) causes ato unit required torque to increase, the enough moments of torsion of torque limiting clutch transmission can not be met through the pressure of the post-decompression hydraulic oil of reduction valve 8 and carry out ato unit, and aforesaid operations is continuous when all cannot start successful three times, then controller 17 controls not to be in second switch valve 12 on same bye-pass with reduction valve 8 or the first switch valve 7 is opened, and control to be positioned at the first switch valve 7 of same bye-pass with reduction valve 8 or second switch valve 12 cuts out, the hydraulic oil in accumulator 13 is made directly to enter into oil hydraulic cylinder 11 without reduction valve 8, hydraulic fluid pressure in oil hydraulic cylinder 11 is increased further, thus make torque limiting clutch produce enough moments of torsion to carry out ato unit.
Concrete, the Optimum Operation program of the controlling method of a kind of hybrid vehicle torque limiting clutch hydraulic control system that the present embodiment provides is as shown in Figure 3, wherein, consistent in order to state, be convenient to understand, the set-up mode of the first switch valve 7, second switch valve 12 and reduction valve 8 is corresponding with Fig. 1.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein, can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a hybrid vehicle torque limiting clutch hydraulic control system, the hydraulic oil container (4) comprising oil hydraulic cylinder (11), oil hydraulic pump (2), the motor (1) driving described oil hydraulic pump (2) to work, the controller (17) controlling described motor (1) start and stop and be communicated with described oil hydraulic pump (2) filler opening, it is characterized in that, also comprise:
The accumulator (13) be communicated with the oil outlet of described oil hydraulic pump (2);
All be communicated with from described accumulator (13) and lay respectively at the first switch valve (7), second switch valve (12) and the oil return switch valve (9) on different bye-pass, described oil return switch valve (9) place bye-pass is communicated with described hydraulic oil container (4);
Be arranged on the reduction valve (8) on the bye-pass at any one place in both described first switch valve (7) and second switch valve (12);
Described first switch valve (7), second switch valve (12) are all communicated with described oil hydraulic cylinder (11) with the bye-pass at oil return switch valve (9) place;
Be communicated with described accumulator (13) with the connecting port being connected external hydraulic power (15).
2. hybrid vehicle torque limiting clutch hydraulic control system according to claim 1, it is characterized in that, also comprise and detect described oil hydraulic cylinder (11) interior pressure, and the pressure signal detected is sent to the sensor of described controller (17).
3. hybrid vehicle torque limiting clutch hydraulic control system according to claim 2, it is characterized in that, also comprise the pressure detecting described accumulator (13) interior hydraulic oil, and the pressure signal detected is sent to multiple pressure relayes (16) of described controller (17).
4. hybrid vehicle torque limiting clutch hydraulic control system according to claim 3, it is characterized in that, also comprise the relief valve (6) being communicated with described accumulator (13) and described hydraulic oil container (4), and the oil pressure relief value of described relief valve (6) is in the numerical difference of the activation pressure value of multiple described pressure relay (16) in scope, wherein, described accumulator (13) is gas-filled type accumulator, and described relief valve (6) is direct-acting overflow valve.
5. hybrid vehicle torque limiting clutch hydraulic control system according to claim 1, is characterized in that, also comprise: be arranged on the filter (3) between described oil hydraulic pump (2) and described hydraulic oil container (4); Be arranged on the first one-way valve (14) between described connecting port (15) and described accumulator (13); Be arranged on second one-way valve (5) at the oil outlet place of described oil hydraulic pump (2).
6. hybrid vehicle torque limiting clutch hydraulic control system according to claim 1, it is characterized in that, described first switch valve (7), second switch valve (12) and oil return switch valve (9) are normally closed electromagnetic switch valve, and described reduction valve (8) is direct acting pressure or proportional pressure-reducing valve.
7. according to the hybrid vehicle torque limiting clutch hydraulic control system in claim 1-6 described in any one, it is characterized in that, described oil hydraulic cylinder (11) comprising:
The piston push rod (11c) of movement under the promotion of hydraulic oil;
Be connected with described piston push rod (11c) and realize the friction plate (11a) that moment of torsion transmits;
Drive the return spring (11b) that described piston push rod (11c) resets.
8. a controlling method for hybrid vehicle torque limiting clutch hydraulic control system, is applicable to the hybrid vehicle torque limiting clutch hydraulic control system in the claims 1-7 described in any one, it is characterized in that, comprise the following steps:
1) after described controller (17) receives and engages signal, control described motor (1) open and drive described oil hydraulic pump (2) to work, the hydraulic oil in described hydraulic oil container (4) is entered in described accumulator (13) to maintain the pressure reaching job requirement in described accumulator (13);
2) described controller (17) controls the closedown of described oil return switch valve (9), and control to be positioned at described first switch valve (7) on same bye-pass with described reduction valve (8) or second switch valve (12) is opened, another one is closed;
3) described accumulator (13) output hydraulic pressure oil under the effect of internal pressure, the bye-pass of hydraulic oil through being provided with described reduction valve (8) enters into described oil hydraulic cylinder (11);
4) hydraulic oil drives described oil hydraulic cylinder (11) to work to enable torque limiting clutch transmitting torque;
5) after described controller (17) receives separation signal, described controller (17) controls described first switch valve (7) and second switch valve (12) cuts out, described oil return switch valve (9) is opened, hydraulic oil flows out from described oil hydraulic cylinder (11), and enter into described hydraulic oil container (4) through described oil return switch valve (9), described oil hydraulic cylinder (11) quits work, and torque limiting clutch stops transmitting torque.
9. the controlling method of hybrid vehicle torque limiting clutch hydraulic control system according to claim 8, is characterized in that, in described step 1) further comprising the steps of before:
After described controller (17) receives joint signal, first the pressure in described accumulator (13) is detected, and testing signal is sent to described controller (17), if pressure is within the scope of job requirement, then described controller (17) does not start described motor (1), if pressure does not reach the scope of job requirement, then carry out above-mentioned steps 1) in operation.
10. the controlling method of hybrid vehicle torque limiting clutch hydraulic control system according to claim 8 or claim 9, is characterized in that, in described step 3) and step 4) between further comprising the steps of:
When the pressure of the hydraulic oil entering into described oil hydraulic cylinder (11) is not enough to support that described oil hydraulic cylinder (11) normally works, described controller (17) controls to be in the described second switch valve (12) not being positioned at same bye-pass with described reduction valve (8) of closed condition or the first switch valve (7) is opened, and control to be in opening state be positioned at described first switch valve (7) of same bye-pass with described reduction valve (8) or described second switch valve (12) cuts out, the hydraulic oil in described accumulator (13) is made directly to enter into described oil hydraulic cylinder (11) without described reduction valve (8).
CN201210447549.6A 2012-11-09 2012-11-09 Hybrid vehicle torque limiting clutch hydraulic control system and controlling method thereof CN102937150B (en)

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CN103382974B (en) * 2013-07-25 2016-09-28 重庆长安汽车股份有限公司 A kind of CVT car torque limiting clutch hydraulic system and control method thereof
CN104074842B (en) * 2014-07-16 2016-04-13 上海豪高机电科技有限公司 Digital valve pilot system
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