CN103075441B - Automatic transmission clutch controlling method - Google Patents
Automatic transmission clutch controlling method Download PDFInfo
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- CN103075441B CN103075441B CN201310020809.6A CN201310020809A CN103075441B CN 103075441 B CN103075441 B CN 103075441B CN 201310020809 A CN201310020809 A CN 201310020809A CN 103075441 B CN103075441 B CN 103075441B
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Abstract
The invention discloses a kind of automatic transmission clutch controlling method, for regulating the pre-oiling force value of clutch, with the interlock of self-adapting detecting clutch point position, described method comprises: step a: the pre-oiling force value solenoidoperated cluthes current according to clutch carry out pre-oiling; Step b: carry out second time with predetermined fixing oil-filled duration solenoidoperated cluthes oil-filled, and obtain the engine output torque value added in second time Oil feeding process; Step c: whether what judge that described engine output torque value added and a moment of torsion preset increase calibration value differs in default margin of error; If so, then current pre-oiling force value is kept; If not, then steps d is carried out; Steps d: change described pre-oiling force value, using the pre-oiling force value after change as current pre-oiling force value, and repeating said steps a is to step c.
Description
Technical field
The present invention relates to Advanced Automotive Automatic Control field, be specifically related to a kind of automatic transmission clutch controlling method.
Background technique
The interlock point of clutch is after clutch overcomes idle stroke, its active part just contacts with secondary part, but do not start transmitting torque or the very little position (this moment of torsion is not enough to overcome vehicle travel resistance makes vehicle travel) of transmitting torque, now the active part of clutch and secondary part produce sliding friction.Before vehicle travels, if by the position of Clutch Control at interlock point, after brake is unclamped, vehicle just can start very soon, reduces the response time that vehicle travels.The interlock point of clutch detects has important impact to the quick response of vehicle start, if clutch linkage point detects inaccuracy, then can cause that clutch abrasion is serious, vehicle oil consumption increases, vehicle start has the problems such as impact.
Automatic transmission clutch does not have clutch position sensor, therefore cannot direct-detection clutch linkage point.In addition due to the factor such as wearing and tearing of automatic transmission clutch, cause the interlock of clutch point position not fixed, clutch charge pressure also can change, therefore the detection of automatic transmission clutch interlock point and problem of adaptive regulation urgently to be resolved hurrily.
Summary of the invention
According to one aspect of the present invention, provide a kind of automatic transmission clutch controlling method, arrive interlock point in order to solenoidoperated cluthes.Described automatic transmission clutch controlling method comprises:
Pre-oiling step: pre-oiling is carried out to described clutch according to pre-oiling force value;
The oil-filled step of second time: for the clutch after pre-oiling, carries out second time to clutch oil-filled, makes described clutch reach described interlock dotted state;
Wherein, in described second time Oil feeding process, be controlled quentity controlled variable with clutch pressure, make clutch pressure increase by a fixed clutch pressure value added; Or, with the clutch oil-filled time for controlled quentity controlled variable, the oil-filled of duration is fixed to clutch.Preferably, described pre-oiling force value is adjustable.
Described method can also comprise regulating step, by regulating to described pre-oiling force value the described pre-oiling force value obtaining the current behaviour in service of corresponding clutch.
Particularly, described regulating step comprises:
Step a: carry out pre-oiling according to current described pre-oiling force value solenoidoperated cluthes;
Step b: carry out second time with described fixing duration solenoidoperated cluthes oil-filled, and obtain the engine output torque value added in second time Oil feeding process;
Step c: whether what judge that described engine output torque value added and a moment of torsion preset increase calibration value differs in default margin of error; If so, then regulating step is terminated; If not, then steps d is carried out;
Steps d: change described pre-oiling force value, using the pre-oiling force value after change as current pre-oiling force value, and repeating said steps a is to step c.
Wherein, in steps d:
When described engine output torque value added is less than described moment of torsion increase calibration value, then described pre-oiling force value is increased predetermined steps long value, to change described pre-oiling force value; Or,
When described engine output torque value added is greater than described moment of torsion increase calibration value, then described pre-oiling force value is reduced predetermined steps long value, to change described pre-oiling force value.
Particularly, described default step value is 0.1bar.
Particularly, described default margin of error is ± 10%.
Preferably, described regulating step carries out when the transmission control unit of vehicle powers at every turn.
According to another aspect of the present invention, provide a kind of automatic transmission clutch controlling method, for regulating the pre-oiling force value of clutch, to adapt to the current behaviour in service of clutch.Described method comprises:
Step a: the pre-oiling force value solenoidoperated cluthes current according to clutch carry out pre-oiling;
Step b: carry out second time with predetermined fixing oil-filled duration solenoidoperated cluthes oil-filled, and obtain the engine output torque value added in second time Oil feeding process;
Step c: whether what judge that described engine output torque value added and a moment of torsion preset increase calibration value differs in default margin of error; If so, then current pre-oiling force value is kept; If not, then steps d is carried out;
Steps d: change described pre-oiling force value, using the pre-oiling force value after change as current pre-oiling force value, and repeating said steps a is to step c.
Wherein, in steps d:
When described engine output torque value added is less than described moment of torsion increase calibration value, then described pre-oiling force value is increased predetermined steps long value, to change described pre-oiling force value; Or,
When described engine output torque value added is greater than described moment of torsion increase calibration value, then described pre-oiling force value is reduced predetermined steps long value, to change described pre-oiling force value.
Particularly, described default step value is 0.1bar.
Particularly, described default margin of error is ± 10%.
Preferably, described method performs when the transmission control unit of vehicle powers at every turn.
Described automatic transmission clutch controlling method is particularly useful for control DCT transmission clutch.
Interlock point is arrived fast by solenoidoperated cluthes pressure or the oil-filled time solenoidoperated cluthes of clutch, thus can start to walk fast when vehicle start, this is for the automatic transmission not having clutch position sensor, clutch abrasion can be reduced greatly, and then reduce unnecessary oil consumption.In addition, automatically adjust the pre-oiling pressure of clutch according to clutch actual wear situation, to guarantee to make clutch arrive interlock point according to predetermined rate-determining steps, reduce and cause clutch aging speed to accelerate because of clutch abrasion.
Accompanying drawing explanation
Figure 1 shows that the pressure variation before and after the automatic transmission clutch pre-oiling that one embodiment of the invention provides;
Figure 2 shows that the pressure variation before and after the automatic transmission clutch pre-oiling that another embodiment of the present invention provides;
Figure 3 shows that the pressure variation before and after the automatic transmission clutch pre-oiling that another embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
In the working procedure of vehicular clutch, clutch completes three Oil feeding process: clutch pre-oiling, make clutch its oil circuit control when pre-oiling state fill full oil, and active part does not contact with secondary part; Second time is oil-filled, makes clutch arrive interlock dotted state by pre-oiling state; After releasing of brake, carried out to clutch third time oil-filled, make clutch complete engaging process, start to transmit Engine torque.Need solenoidoperated cluthes never linkage status arrival interlock point in the present invention, therefore need solenoidoperated cluthes pre-oiling force value and second time charge pressure value.
In the unworn situation of clutch, first can carry out collection and the staking-out work of following parameter, this working examples as carried out before vehicle release.First unworn clutch pre-oiling pressure value P 1 can be demarcated, clutch its oil circuit control when pre-oiling state is made to fill full oil, and active part does not contact with secondary part, motor is for keeping its output torque idle constant, and record engine output torque is now T1.Then clutch is carried out to second time is oil-filled makes it arrive interlock point.Carrying out in second time Oil feeding process to clutch, along with clutch pressure value constantly increases, active part and the secondary part of clutch start to contact generation sliding friction, and motor also can increase output torque accordingly for continuing to keep idle.Record this process clutch pressure value P2 when arriving interlock point of long t consuming time, clutch and motor second output torque value T2, thus clutch pressure value added DeltaP=P2-P1, clutch pressure variance ratio GradP=(P2-P1)/t and the engine output torque calibrated when clutch arrives interlock point by pre-oiling state increases calibration value DeltaT=T2-T1.
In fact, the engine output torque of clutch when never linkage status arrives interlock point position increases calibration value DeltaT can be considered as a constant fixed value, therefore can increase calibration value DeltaT according to engine output torque and judge whether clutch arrives an interlock point position.
For clutch Oil feeding process; clutch pressure changes too fast meeting and causes engine misses; clutch pressure changed can cause clutch slip friction seriously slowly; therefore; in the actual design of vehicle; clutch pressure variance ratio GradP can be set as a fixed value of having demarcated usually, to avoid the problems referred to above.Therefore in fact described clutch pressure variance ratio GradP=DeltaP/t can be considered as being a substantially invariable amount, so just can by control second time oil-filled institute long t consuming time obtain required clutch pressure value added DeltaP=GradP*t, thus acquisition required for clutch pressure value P2=P1+DeltaP.
By clutch pre-oiling pressure value P 1 described in transmission control unit record and the oil-filled long t consuming time of described second time, thus when solenoidoperated cluthes arrive interlock dotted state by not linking, first pre-oiling is completed with described pre-oiling pressure value P 1 solenoidoperated cluthes, then the solenoidoperated cluthes second time of carrying out duration t with described clutch pressure variance ratio GradP is oil-filled, and clutch can be made to arrive interlock point.Certainly, in another embodiment, transmission control unit also can directly record clutch pressure value added DeltaP, and solenoidoperated cluthes pressure reaches P2=P1+DeltaP in second time Oil feeding process, and clutch can be made to arrive interlock point.
After clutch in use produces wearing and tearing, clutch arrives the clutch pressure value P2 of interlock needed for dotted state and can change.Present inventor is found by research, although clutch pressure value P2 can change, in fact clutch abrasion or other factors are mainly reflected in pre-oiling pressure value P 1 impact of clutch pressure.That is, if accurately can determine a new suitable pre-oiling pressure value P 1 along with the wearing and tearing of clutch, so after clutch pre-oiling completes, in second time Oil feeding process, as long as make clutch pressure value increase DeltaP, then clutch can be made to arrive interlock dotted state.
Figure 1 shows that unworn automatic transmission clutch is by the not linkage status pressure variation to interlock point.Time in Fig. 1 from-0.5s to 0s, pre-oiling is completed to clutch, make in the oil circuit control of the clutch when 0s, to fill full oil; Then the duration t that namely aforesaid second time is oil-filled from 0s to 0.5s() between clutch carried out to second time is oil-filled makes it arrive interlock point.As can be seen from Fig. 1, because pre-oiling force value is suitable, therefore second time is oil-filled start time along with the continuous increase of clutch pressure value, engine output torque value also increases thereupon.As shown in Figure 1, when pre-oiling completes, engine output torque value is 2Nm, and the oil-filled rear engine output torque value that completes of second time is 10Nm, and in second time Oil feeding process, engine output torque value added is 8Nm.Under clutch is in interlock dotted state, after releasing of brake, the active part of clutch and secondary part can engage fast, thus can start vehicle fast.
Along with increasing of clutch access times, clutch causes clutch linkage point position to change after there are wearing and tearing, after carrying out pre-oiling with described pre-oiling pressure value P 1 pair of clutch, oil may do not filled up in the oil circuit control of clutch, also likely oil is filled up already and active part and secondary part have started to contact, will cause like this with in described duration t(and Fig. 2 and Fig. 3 from 0s to 0.5s) to clutch carry out second time oil-filled after, likely clutch does not also arrive interlock point position as shown in Figure 2, also interlock point position has likely been crossed as shown in Figure 3 already.Therefore, after each transmission control unit powers on, regulate the pre-oiling pressure value P 1 of clutch by performing following regulating step, so that the current behaviour in service of clutch can be adapted to:
Step a, carries out pre-oiling according to current clutch pre-oiling pressure value P 1 solenoidoperated cluthes;
Step b, carries out second time with described duration t solenoidoperated cluthes oil-filled, obtains engine output torque value added DeltaT2 in second time Oil feeding process;
Step c, comparing DeltaT2 whether equal with the engine output torque preset if increasing calibration value DeltaT, if equal or error, within the scope of predictive error, terminates regulating step; Otherwise change pre-oiling pressure value P 1; Particularly, judge the size of DeltaT2 and DeltaT, if DeltaT2<DeltaT, continue steps d; If DeltaT2>DeltaT, continue step e;
Steps d, increases predetermined steps long value as new pre-oiling pressure value P 1 using pre-oiling pressure value P 1, then repeat step a to step c;
Step e, reduces predetermined steps long value as new pre-oiling pressure value P 1 using pre-oiling pressure value P 1, then repeat step a to step c.
Wherein, described default step value is specifically as follows 0.1bar.Described default margin of error is specially ± and 10%.Certainly, described default step value and described default margin of error can be all other numerical value, to adapt to different degrees of regulation.
For Fig. 1 to Fig. 3, presetting engine output torque increases calibration value DeltaT=8Nm, then the engine output torque value added shown in Fig. 1 is equal with DeltaT, does not need adjustment pre-oiling pressure value P 1.Engine output torque value added shown in Fig. 2 is less than 8Nm, need to increase pre-oiling pressure value P 1, to make clutch after the second time of fixing duration t is oil-filled can arrive interlock point, thus after Panasonic's brake, clutch can engage fast, reduces the race of engine time.Engine output torque value added shown in Fig. 3 is greater than 8Nm, needs to reduce pre-oiling pressure value P 1, avoids too much causing engine output torque excessive because clutch engages, and wastes energy, also avoids the wearing and tearing aggravating clutch further.
By the clutch pre-oiling pressure value P 1 after the adjustment of transmission control unit record, and carry out solenoidoperated cluthes complete pre-oiling with the pre-oiling pressure value P 1 after adjustment, after pre-oiling is completed clutch oil circuit control in just fill full oil, and then an interlock point position can be arrived by solenoidoperated cluthes.Because the state of wear of vehicle clutch in running can not be estimated, therefore cannot with the pre-oiling force value preset to adapt to various state, and according to above-mentioned set-up procedure carrying out adjusting to clutch pre-oiling force value and can obtain the clutch pre-oiling force value of applicable current state at any time, reduce wear the working life of improving clutch.
It will be appreciated that, the method of previously described adjustment clutch pre-oiling pressure value P 1 is not only applicable in the automatic transmission clutch controlling method in the present invention, and goes in other clutch control method, regulate clutch pre-oiling force value.
Above embodiment only for illustration of technological scheme of the present invention, is not limited to protection scope of the present invention.The amendment that those skilled in the art can carry out technological scheme of the present invention or replace on an equal basis, and do not depart from the spirit and scope of technical solution of the present invention.
Claims (4)
1. an automatic transmission clutch controlling method, for regulating the pre-oiling force value of clutch, with the interlock of self-adapting detecting clutch point position, described method comprises:
Step a: the pre-oiling force value solenoidoperated cluthes current according to clutch carry out pre-oiling;
Step b: carry out second time with predetermined fixing oil-filled duration solenoidoperated cluthes oil-filled, and obtain the engine output torque value added in second time Oil feeding process;
Step c: whether what judge that described engine output torque value added and a moment of torsion preset increase calibration value differs in default margin of error; If so, then current pre-oiling force value is kept; If not, then steps d is carried out;
Steps d: change described pre-oiling force value, using the pre-oiling force value after change as current pre-oiling force value, and repeating said steps a is to step c;
In steps d:
When described engine output torque value added is less than described moment of torsion increase calibration value, then described pre-oiling force value is increased predetermined steps long value, to change described pre-oiling force value; Or,
When described engine output torque value added is greater than described moment of torsion increase calibration value, then described pre-oiling force value is reduced predetermined steps long value, to change described pre-oiling force value.
2. automatic transmission clutch controlling method according to claim 1, is characterized in that, described predetermined steps long value is 0.1bar.
3. automatic transmission clutch controlling method according to claim 1, is characterized in that, described default margin of error is ± 10%.
4. the automatic transmission clutch controlling method according to any one of claim 1-3, is characterized in that, described method performs when the transmission control unit of vehicle powers at every turn.
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| CN201310020809.6A CN103075441B (en) | 2013-01-18 | 2013-01-18 | Automatic transmission clutch controlling method |
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| CN103277428B (en) * | 2013-05-31 | 2015-06-03 | 安徽江淮汽车股份有限公司 | Wet dual-clutch automatic transmission and precharging pressure control method thereof |
| CN104675883B (en) * | 2013-11-29 | 2017-04-19 | 上海汽车集团股份有限公司 | Clutch control method and system |
| CN103629341B (en) * | 2013-12-13 | 2016-03-02 | 安徽江淮汽车股份有限公司 | A kind of wet-type double-clutch automatic speed-change case Characteristics of Solenoid Valve curve compensation method |
| CN104088999A (en) * | 2014-06-30 | 2014-10-08 | 盛瑞传动股份有限公司 | Control method and system for automatic transmission clutch oil charging time compensation |
| CN106555876B (en) * | 2015-09-29 | 2019-03-15 | 长城汽车股份有限公司 | The oil-filled control method of clutch in a kind of double-clutch speed changer |
| CN105179680A (en) * | 2015-10-13 | 2015-12-23 | 哈尔滨东安汽车发动机制造有限公司 | Oil charge control method for clutch in automatic transmission |
| CN105422841B (en) * | 2015-11-30 | 2017-10-17 | 盛瑞传动股份有限公司 | A kind of automatic transmission shift self-adaptation control method and system |
| CN105909694A (en) * | 2016-04-29 | 2016-08-31 | 中国第汽车股份有限公司 | Oil charging parameter self-learning method for clutches of wet-type double-clutch automatic transmission |
| CN106641238B (en) * | 2016-12-13 | 2019-02-19 | 安徽江淮汽车集团股份有限公司 | The oil-filled control method of wet dual clutch transmission and system |
| CN111350814B (en) * | 2018-12-24 | 2021-05-25 | 长城汽车股份有限公司 | Oil filling time or oil filling pressure calibration method and system of clutch and vehicle |
| CN111853082B (en) * | 2020-06-16 | 2021-11-19 | 义乌吉利动力总成有限公司 | Method and system for adjusting oil charging pressure of hydraulic clutch and storage medium |
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Effective date of registration: 20190411 Address after: 317000 east gate of Taizhou City, Zhejiang Province Co-patentee after: Zhejiang Geely Holding Group Co., Ltd. Patentee after: Zhejiang Geely Automobile Research Institute Co., Ltd. Address before: 311228 No. 206 Farmer's Second House in Linjiang Industrial Park, Xiaoshan District, Hangzhou City, Zhejiang Province Co-patentee before: Zhejiang Geely Automobile Research Institute Co., Ltd. Patentee before: Hangzhou Branch, Zhejiang Geely Automobile Research Institute Co., Ltd. Co-patentee before: Zhejiang Geely Holding Group Co., Ltd. |
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