CN102996785A - Gear shifting control method of wet-type double clutch - Google Patents
Gear shifting control method of wet-type double clutch Download PDFInfo
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- CN102996785A CN102996785A CN2012105532782A CN201210553278A CN102996785A CN 102996785 A CN102996785 A CN 102996785A CN 2012105532782 A CN2012105532782 A CN 2012105532782A CN 201210553278 A CN201210553278 A CN 201210553278A CN 102996785 A CN102996785 A CN 102996785A
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Abstract
The invention discloses a gear shifting control method of a wet-type double clutch, which comprises the following steps of: pre-shifting: a first clutch is shifted to one gear, when a target gear needs to be switched, a second clutch carries out the pre-shifting of the target gear, and a switching point torque value transmitted to a transmission case by a current motor is acquired; transition: the oil pressure of the first clutch is lowered, and the oil pressure of the second clutch is heightened till an oil pressure value corresponding to the switching point torque value is reached, wherein the sum of torque transmitted by the first clutch and the second clutch is equal to the switching point torque value all the time in the process; and switching: the oil pressure of the second clutch is kept, and the rotary speed of the motor is synchronized. The gear shifting control method disclosed by the invention ensures the smoothness of oil pressure alternation of the two clutches and enhances the gear shifting quality and safety.
Description
Technical field
The present invention relates to wet-type dual-clutch gearbox field, particularly the shift control method of wet-type dual-clutch.
Background technique
The wet-type double-clutch automatic speed-change case comprises two clutches, after a clutch is hung a gear, in shift process, the in advance combination of the isochronous controller of another clutch, then by the oil pressure of two clutches of control, a clutch and gearbox are broken away from, and another clutch transmission engage, realize that the moment of torsion transmission is transitioned into another clutch from a clutch, thereby finish the switching of gear.
With respect to traditional single clutch structure, this double clutch gearbox has the fast characteristics of shift speed, but realize in the process of gear switch in oil pressure control, to the higher requirement of steady switching proposition of gear, wish when switching fast, can steadily switch.
Summary of the invention
The present invention proposes a kind of gear control method of wet-type dual-clutch, realize the steady switching of gear.
For achieving the above object, the embodiment of the invention provides following technological scheme:
A kind of gear control method of wet-type dual-clutch comprises:
The pre-hung step: first clutch hangs on the gear, and when needs switched to the target gear, second clutch carried out the pre-hung of target gear, obtains simultaneously the switching point torque value that present engine passes to gearbox;
Transition step: the oil pressure of first clutch reduces, the oil pressure of second clutch raises until reach the corresponding oil pressure value of switching point torque value, in this process, the moment of torsion sum that first clutch and second clutch transmit equals described switching point torque value all the time;
Switch step: keep the oil pressure of second clutch, engine speed is carried out synchronously.
Preferably, between pre-hung step and transition step, also comprise the preacceleration inflation step: first clutch carries out sliding wear control, and the oil pressure of second clutch rises and remains on the preacceleration inflation value.
Preferably, in switch step: the first clutch oil pressure value remains on the preacceleration inflation value.
Preferably, after switch step, the oil pressure of first clutch discharges fully, and second clutch carries out sliding wear control.
The gear control method of wet-type dual-clutch of the present invention, when carrying out the gear pre-hung, obtain the torque value that motor at that time passes to gearbox, and reduce at the first clutch oil pressure, in the process that the second clutch oil pressure raises, remain the torque value that obtains when moment of torsion sum that two clutches transmit equals pre-hung, expectation moment of torsion based on clutch in transient process is controlled, logic is simple, be easy to realize, and remain that the moment of torsion sum of transmitting is constant, guarantee the smoothness that two clutch pressures replace, improved the Security of gearshift quality and gearshift.
Description of drawings
Fig. 1 is the gear control method flow chart of wet-type dual-clutch of the present invention.
Fig. 2 is the flow chart according to the gear control method of the wet-type dual-clutch of the embodiment of the invention.
Fig. 3 is oil pressure, Engine torque and the rotation speed change tendency chart that utilizes gear control method clutch in shift process of the embodiment of the invention.
Embodiment
For above-mentioned purpose, the feature and advantage that make invention can become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization in the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
With reference to shown in Figure 1, shift control method for wet-type dual-clutch of the present invention, comprise: the pre-hung step: first clutch hangs on the gear, when needs switch to the target gear, second clutch carries out the pre-hung of target gear, obtains simultaneously the switching point torque value that present engine passes to gearbox; Transition step: the oil pressure of first clutch reduces, the oil pressure of second clutch raises until reach the corresponding oil pressure value of switching point torque value, in this process, the moment of torsion sum that first clutch and second clutch transmit equals described switching point torque value all the time; Switch step: the second clutch oil pressure value keeps, and engine speed reduces first and then is transitioned into second clutch driven disc rotating speed.
When carrying out the gear pre-hung, obtain the torque value that motor at that time passes to gearbox, and in the process that the first clutch oil pressure reduces, the second clutch oil pressure raises, remain the torque value that obtains when moment of torsion sum that two clutches transmit equals pre-hung, expectation moment of torsion based on clutch in transient process is controlled, logic is simple, be easy to realize, and remain that the moment of torsion sum of transmitting is constant, guarantee the smoothness that two clutch pressures replace, improved the Security of gearshift quality and gearshift.
Below in conjunction with preferred embodiment technological scheme of the present invention is described in detail, in the present invention, all take first clutch as using gear, second clutch is described for the target gear that will switch, but be understandable that first, second clutch only refers to a clutch in the double clutch.
As shown in Figures 2 and 3, at first, S201, when normal vehicle operation, namely first clutch hangs on some gears, need to judge whether gear shift.
Normally, be input to the torque signal of gearbox etc. by detection accelerator open degree signal, vehicle speed signal and motor, and comprehensively judged by the car load processor, determine whether to carry out transforming gear.
Then, S202, when the target gear was arrived in the needs gear shift, second clutch carried out the pre-hung of target gear, that is to say, and the gear synchronizer of second clutch carries out combination in advance.
Simultaneously, obtain this moment motor and pass to the torque value of gearbox, i.e. switching point torque value.
Then, S203 carries out the preacceleration inflation step, particularly, is that the oil pressure of second clutch rises and remains on preacceleration inflation value (kisspoint), and first clutch carries out sliding wear control.
Carrying out preacceleration inflation herein, is in order to guarantee that in shift process clutch is transmitting torque fast, to reduce the time that two clutch moment of torque replace.Particularly, in the present embodiment, in advance to the certain oil pressure of second clutch preliminary filling, be used for eliminating the clutch pressure that self structure consumes before the beginning transmitting torque, such as resistance of the return spring of the oil pocket of the gap in the clutch friction plate, clutch and oil pocket etc., in the present invention, preacceleration inflation value (kisspoint) refers to that the gap between the clutch friction plate just is eliminated, corresponding pressure when beginning to contact has namely just begun pressure corresponding can transmitting torque the time.
Among the present invention, sliding wear control (sliding mode control) refers in the process of clutch normal delivery moment of torsion, remain and keep certain speed discrepancy between the driving disc rotating speed (engine speed) of clutch and the driven disc rotating speed of clutch (corresponding input shaft rotating speed), be the speed discrepancy of 10rpm generally speaking, this is for fear of vehicle under steam, jolt directly by reaction clutch to motor because the injustice on road surface produces, thereby guarantee that engine running is stationarity.
Rise to the preacceleration inflation value with the oil pressure of second clutch this moment first, under special operation condition, can respond fast guaranteeing, simultaneously, another clutch normal delivery moment of torsion.
Then, S204, carry out transition step, the oil pressure checker of first clutch and second clutch namely, the oil pressure of first clutch reduces, the oil pressure of second clutch raises until reach the corresponding oil pressure value of switching point torque value, and in this process, the moment of torsion sum that first clutch and second clutch transmit equals described switching point torque value all the time.
Like this, be constant by remaining the moment of torsion sum of transmitting, guaranteed the smoothness that two clutch pressures replace, improve the Security of gearshift quality and gearshift.
Then, carry out switch step, keep the oil pressure of second clutch, engine speed is carried out synchronously.
That is to say that in this step, the oil pressure of second clutch remains on the corresponding oil pressure value of switching point torque value, the rotating speed of motor is transitioned into the rotating speed of the second clutch driven disc of new combination, realize being transitioned into second clutch by first clutch.Normally, at first, S205, the new torque request of engine response gearbox, S206, and by reducing first the actual torque of present engine makes the rotating speed of the level and smooth second clutch driven disc that is transitioned into new combination of the rotating speed of motor.More preferably, in this step, the oil pressure of first clutch remains at the preacceleration inflation value, can respond fast under special operation condition guaranteeing.
Afterwards, S207, the oil pressure of first clutch discharges fully, second clutch carries out sliding wear control, S208, and the synchronous gear controller of first clutch is thrown off, transmit the moment of torsion that motor is input to gearbox by second clutch, Motor Vehicle normally travels under the gear of second clutch.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the shift control method of a wet-type dual-clutch is characterized in that, comprising:
The pre-hung step: first clutch hangs on the gear, and when needs switched to the target gear, second clutch carried out the pre-hung of target gear, obtains simultaneously the switching point torque value that present engine passes to gearbox;
Transition step: the oil pressure of first clutch reduces, the oil pressure of second clutch raises until reach the corresponding oil pressure value of switching point torque value, in this process, the moment of torsion sum that first clutch and second clutch transmit equals described switching point torque value all the time;
Switch step: keep the oil pressure of second clutch, engine speed is carried out synchronously.
2. the shift control method of wet-type dual-clutch according to claim 1, it is characterized in that, between pre-hung step and transition step, also comprise the preacceleration inflation step: first clutch carries out sliding wear control, and the oil pressure of second clutch rises and remains on the preacceleration inflation value.
3. the shift control method of wet-type dual-clutch according to claim 1 is characterized in that, in switch step: the first clutch oil pressure value remains on the preacceleration inflation value.
4. the shift control method of wet-type dual-clutch according to claim 1 is characterized in that, after switch step, the oil pressure of first clutch discharges fully, and second clutch carries out sliding wear control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210553278.2A CN102996785B (en) | 2012-12-19 | 2012-12-19 | The shift control method of wet-type dual-clutch |
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| CN201210553278.2A CN102996785B (en) | 2012-12-19 | 2012-12-19 | The shift control method of wet-type dual-clutch |
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| CN102996785A true CN102996785A (en) | 2013-03-27 |
| CN102996785B CN102996785B (en) | 2015-08-19 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322163A (en) * | 2013-06-09 | 2013-09-25 | 安徽江淮汽车股份有限公司 | Slipping control method for automatic transmission of wet double clutch |
| CN104214332A (en) * | 2013-05-31 | 2014-12-17 | 通用汽车环球科技运作有限责任公司 | Methodology for controlling a hydraulic control system of a continuously variable transmission |
| CN104251304A (en) * | 2013-06-26 | 2014-12-31 | 腓特烈斯港齿轮工厂股份公司 | Method for operating a double clutch transmission |
| CN104329456A (en) * | 2014-10-09 | 2015-02-04 | 盛瑞传动股份有限公司 | Gear-shifting control method and gear-shifting control system |
| CN104948728A (en) * | 2015-05-06 | 2015-09-30 | 中国第一汽车股份有限公司 | Method for controlling starting of automatic wet-type dual-clutch transmission |
| CN105042063A (en) * | 2015-07-13 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Positive torque sequence downshift control method of wet double-clutch transmission |
| CN105650268A (en) * | 2014-11-28 | 2016-06-08 | 比亚迪股份有限公司 | Switching control method for clutches in gearbox and gearbox controller |
| CN106585620A (en) * | 2015-10-13 | 2017-04-26 | 上海汽车集团股份有限公司 | Control method and device for power switching and hybrid control unit (HCU) |
| CN106931153A (en) * | 2015-12-31 | 2017-07-07 | 上海汽车集团股份有限公司 | Gear box control unit and its shift fork pre-hung shelves method |
| CN111623113A (en) * | 2020-06-12 | 2020-09-04 | 重庆青山工业有限责任公司 | Clutch control method for first gear and second gear increasing in starting process of double-clutch transmission |
| CN112392872A (en) * | 2020-12-08 | 2021-02-23 | 安徽江淮汽车集团股份有限公司 | Double-clutch control method, vehicle and readable storage medium |
| CN113669445A (en) * | 2021-08-24 | 2021-11-19 | 潍柴动力股份有限公司 | Gear switching method and device, electronic equipment, storage medium and program product |
| WO2021244464A1 (en) * | 2020-06-05 | 2021-12-09 | 中国第一汽车股份有限公司 | Driving force recovery control method and device, and 48v drive system |
| CN114576350A (en) * | 2020-11-30 | 2022-06-03 | 比亚迪股份有限公司 | Double-clutch gear shifting control method and device and automobile |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214332A (en) * | 2013-05-31 | 2014-12-17 | 通用汽车环球科技运作有限责任公司 | Methodology for controlling a hydraulic control system of a continuously variable transmission |
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| CN104251304B (en) * | 2013-06-26 | 2019-03-29 | 腓特烈斯港齿轮工厂股份公司 | Method for running dual-clutch transmission |
| CN104251304A (en) * | 2013-06-26 | 2014-12-31 | 腓特烈斯港齿轮工厂股份公司 | Method for operating a double clutch transmission |
| CN104329456A (en) * | 2014-10-09 | 2015-02-04 | 盛瑞传动股份有限公司 | Gear-shifting control method and gear-shifting control system |
| CN104329456B (en) * | 2014-10-09 | 2016-08-17 | 盛瑞传动股份有限公司 | A kind of shift control method and system |
| CN105650268A (en) * | 2014-11-28 | 2016-06-08 | 比亚迪股份有限公司 | Switching control method for clutches in gearbox and gearbox controller |
| CN105650268B (en) * | 2014-11-28 | 2018-04-20 | 比亚迪股份有限公司 | The method for handover control and gearbox control of clutch in gearbox |
| CN104948728B (en) * | 2015-05-06 | 2017-02-01 | 中国第一汽车股份有限公司 | Method for controlling starting of automatic wet-type dual-clutch transmission |
| CN104948728A (en) * | 2015-05-06 | 2015-09-30 | 中国第一汽车股份有限公司 | Method for controlling starting of automatic wet-type dual-clutch transmission |
| CN105042063A (en) * | 2015-07-13 | 2015-11-11 | 安徽江淮汽车股份有限公司 | Positive torque sequence downshift control method of wet double-clutch transmission |
| CN106585620A (en) * | 2015-10-13 | 2017-04-26 | 上海汽车集团股份有限公司 | Control method and device for power switching and hybrid control unit (HCU) |
| CN106585620B (en) * | 2015-10-13 | 2019-07-16 | 上海汽车集团股份有限公司 | A kind of powershift control method, device and HCU |
| CN106931153A (en) * | 2015-12-31 | 2017-07-07 | 上海汽车集团股份有限公司 | Gear box control unit and its shift fork pre-hung shelves method |
| CN106931153B (en) * | 2015-12-31 | 2018-07-17 | 上海汽车集团股份有限公司 | Gear box control unit and its shift fork pre-hung shelves method |
| WO2021244464A1 (en) * | 2020-06-05 | 2021-12-09 | 中国第一汽车股份有限公司 | Driving force recovery control method and device, and 48v drive system |
| CN111623113A (en) * | 2020-06-12 | 2020-09-04 | 重庆青山工业有限责任公司 | Clutch control method for first gear and second gear increasing in starting process of double-clutch transmission |
| CN111623113B (en) * | 2020-06-12 | 2022-04-19 | 重庆青山工业有限责任公司 | Clutch control method for first gear and second gear increasing in starting process of double-clutch transmission |
| CN114576350A (en) * | 2020-11-30 | 2022-06-03 | 比亚迪股份有限公司 | Double-clutch gear shifting control method and device and automobile |
| CN112392872A (en) * | 2020-12-08 | 2021-02-23 | 安徽江淮汽车集团股份有限公司 | Double-clutch control method, vehicle and readable storage medium |
| CN113669445A (en) * | 2021-08-24 | 2021-11-19 | 潍柴动力股份有限公司 | Gear switching method and device, electronic equipment, storage medium and program product |
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