CN103075441A - Clutch controlling method for automatic transmission - Google Patents
Clutch controlling method for automatic transmission Download PDFInfo
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- CN103075441A CN103075441A CN2013100208096A CN201310020809A CN103075441A CN 103075441 A CN103075441 A CN 103075441A CN 2013100208096 A CN2013100208096 A CN 2013100208096A CN 201310020809 A CN201310020809 A CN 201310020809A CN 103075441 A CN103075441 A CN 103075441A
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Abstract
The invention discloses a clutch controlling method for an automatic transmission. The method is used for adjusting a pre-charged oil pressure value of a clutch to detect the linkage point position of the clutch in a self-adaption way. The method comprises the following steps of: step a. controlling the clutch to previously charge oil according to the current pre-charged oil pressure value of the clutch; step b. controlling the clutch to secondly charge oil at a preset fixed oil charging time, and obtaining an added value of an output torque of an engine in the process of secondary oil charging; step c. judging whether or not the difference between the added value of the output torque of the engine and the added calibration value of a preset torque is within a preset error range, keeping the current pre-charged oil pressure value if yes, and carrying out step d if no; and step d. changing the pre-charged oil pressure value, taking the changed pre-charged oil pressure value as the current pre-charged oil pressure value, and repeating the steps a-c.
Description
Technical field
The present invention relates to the 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 begin the very little position of transmitting torque or transmitting torque (this moment of torsion is not enough to overcome the Vehicle Driving Cycle resistance and makes Vehicle Driving Cycle), this moment, active part and the secondary part of clutch produced sliding friction.Before Vehicle Driving Cycle, if with the position of Clutch Control at the interlock point, after brake is unclamped, just vehicle can start very soon, reduce the response time of Vehicle Driving Cycle.The quick response that the interlock point of clutch detects vehicle start has important impact, if clutch linkage point detects inaccuracy, can cause then that clutch abrasion is serious, vehicle oil consumption increase, vehicle start have the problems such as impact.
Automatic transmission clutch does not have clutch position sensor, therefore can't direct-detection clutch linkage point.Because the factors such as wearing and tearing of automatic transmission clutch cause the interlock point position of clutch unfixing, the clutch charge pressure also can change, so detection and the problem of adaptive regulation of automatic transmission clutch interlock point need to be resolved hurrily in addition.
Summary of the invention
According to one aspect of the present invention, a kind of automatic transmission clutch controlling method is provided, arrive the interlock point in order to solenoidoperated cluthes.Described automatic transmission clutch controlling method comprises:
Pre-oiling step: described clutch is carried out pre-oiling according to the pre-oiling force value;
Oil-filled step for the second time: for the clutch behind the pre-oiling, clutch is carried out the second time oil-filled, so that described clutch reaches described interlock dotted state;
Wherein, in described second time Oil feeding process, take clutch pressure as controlled quentity controlled variable, so that clutch pressure increases by a fixed clutch pressure value added; Perhaps, take the oil-filled time of clutch as controlled quentity controlled variable, clutch is fixed the oil-filled of duration.Preferably, described pre-oiling force value is adjustable.
Described method can also comprise regulating step, by described pre-oiling force value being regulated to obtain the described pre-oiling force value of 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 the second time with described fixedly duration solenoidoperated cluthes oil-filled, and obtain the engine output torque value added in the Oil feeding process for the second time;
Step c: judge that described engine output torque value added and a default moment of torsion increase differing whether in default margin of error of calibration value; If so, then finish regulating step; If not, then carry out steps d;
Steps d: change described pre-oiling force value, as current pre-oiling force value, and repeating said steps a is to step c with the pre-oiling force value after changing.
Wherein, in steps d:
When described engine output torque value added increases calibration value less than described moment of torsion, then described pre-oiling force value is increased the predetermined steps long value, to change described pre-oiling force value; Perhaps,
When described engine output torque value added increases calibration value greater than described moment of torsion, then described pre-oiling force value is reduced the 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, a kind of automatic transmission clutch controlling method is provided, be used 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 the engine output torque value added in the acquisition Oil feeding process second time;
Step c: judge that described engine output torque value added and a default moment of torsion increase differing whether in default margin of error of calibration value; If so, then keep current pre-oiling force value; If not, then carry out steps d;
Steps d: change described pre-oiling force value, as current pre-oiling force value, and repeating said steps a is to step c with the pre-oiling force value after changing.
Wherein, in steps d:
When described engine output torque value added increases calibration value less than described moment of torsion, then described pre-oiling force value is increased the predetermined steps long value, to change described pre-oiling force value; Perhaps,
When described engine output torque value added increases calibration value greater than described moment of torsion, then described pre-oiling force value is reduced the 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 is carried out when the transmission control unit of vehicle powers at every turn.
Described automatic transmission clutch controlling method is particularly useful for controlling the DCT transmission clutch.
Arrive fast the interlock point by solenoidoperated cluthes pressure or the oil-filled time solenoidoperated cluthes of clutch, thereby can when vehicle start, can start to walk fast, this is for the automatic transmission that does not have clutch position sensor, can reduce greatly clutch abrasion, and then reduce unnecessary oil consumption.In addition, automatically adjust the pre-oiling pressure of clutch according to clutch actual wear situation, to guarantee making clutch arrive the interlock point according to predetermined control step, reduce because clutch abrasion causes the clutch aging speed and accelerate.
Description of drawings
Figure 1 shows that the pressure variation of the automatic transmission clutch pre-oiling front and back that one embodiment of the invention provides;
Figure 2 shows that the pressure variation of the automatic transmission clutch pre-oiling front and back that another embodiment of the present invention provides;
Figure 3 shows that the pressure variation of the automatic transmission clutch pre-oiling front and back that another embodiment of the present invention provides.
Embodiment
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
In the working procedure of vehicular clutch, clutch is finished Oil feeding process three times: the clutch pre-oiling, so that clutch its oil circuit control when the pre-oiling state is filled full oil, and active part does not contact with secondary part; For the second time oil-filled, so that clutch arrives the interlock dotted state by the pre-oiling state; After releasing of brake, clutch is carried out oil-filledly for the third time, so that clutch is finished engaging process, begin to transmit Engine torque.Need among the present invention solenoidoperated cluthes never linkage status arrive the interlock point, therefore need solenoidoperated cluthes pre-oiling force value and charge pressure value for the second time.
In the unworn situation of clutch, can carry out first collection and the staking-out work of following parameter, this work for example can be carried out before vehicle dispatches from the factory.At first can demarcate unworn clutch pre-oiling pressure value P 1, so that clutch its oil circuit control when the pre-oiling state is filled full oil, and active part does not contact with secondary part, and motor is for keeping idle its output torque constant, and record engine output torque at this moment is T1.Then clutch is carried out oil-filled its arrival interlock point that makes second time.Clutch is being carried out in the Oil feeding process second time, and along with the clutch pressure value constantly increases, the active part of clutch begins to contact the generation sliding friction with secondary part, and motor also can increase output torque accordingly for continuing to keep idle.Record this process long t consuming time, clutch clutch pressure value P2 and motor the second output torque value T2 when arriving the interlock point, thereby clutch pressure value added DeltaP=P2-P1, clutch pressure variance ratio GradP=(P2-P1)/t and engine output torque when calibrating clutch and arriving the interlock point by the pre-oiling state increase 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 and 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 the clutch Oil feeding process; clutch pressure changes too fast meeting and causes engine misses; clutch pressure changed can cause the clutch slip friction seriously slowly; therefore; in the actual design of vehicle; clutch pressure variance ratio GradP usually can be set as one and demarcate good fixed value, to avoid the problems referred to above.Therefore in fact can be considered as be a substantially invariable amount to described clutch pressure variance ratio GradP=DeltaP/t, so just can by control for the second time oil-filled long t consuming time obtain required clutch pressure value added DeltaP=GradP*t, thereby obtain needed clutch pressure value P2=P1+DeltaP.
By transmission control unit record described clutch pre-oiling pressure value P 1 and the described second time oil-filled long t consuming time, thereby when solenoidoperated cluthes arrive the interlock dotted state by not linking, at first finish pre-oiling with described pre-oiling pressure value P 1 solenoidoperated cluthes, then solenoidoperated cluthes are oil-filled with the second time that described clutch pressure variance ratio GradP carries out duration t, can be so that clutch arrives the 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, can be so that clutch arrives the interlock point.
After clutch in use produced wearing and tearing, clutch arrived the required clutch pressure value P2 of interlock dotted state and can change.The present inventor is by the research discovery, although clutch pressure value P2 can change, in fact clutch abrasion or other factors are mainly reflected on the pre-oiling pressure value P 1 impact of clutch pressure.That is to say, if can accurately determine along with the wearing and tearing of clutch a new suitable pre-oiling pressure value P 1, so after the clutch pre-oiling is finished, in second time Oil feeding process, as long as so that the clutch pressure value increases DeltaP, then can be so that clutch arrives the interlock dotted state.
Figure 1 shows that unworn automatic transmission clutch is by the pressure variation to the interlock point of linkage status not.Clutch is finished pre-oiling from-0.5s during to 0s among Fig. 1, so that when 0s, fill full oil in the oil circuit control of clutch; Then be the aforesaid second time of oil-filled duration t from 0s to 0.5s() between clutch is carried out oil-filledly making it arrive the interlock point second time.By can finding out among Fig. 1 because the pre-oiling force value is suitable, therefore when for the second time oil-filled beginning along with the continuous increase of clutch pressure value, the engine output torque value also increases thereupon.As shown in fig. 1, the engine output torque value is 2Nm when pre-oiling is finished, and the oil-filled rear engine output torque value of finishing is 10Nm for the second time, and the engine output torque value added is 8Nm in the Oil feeding process for the second time.Clutch is under the interlock dotted state, and the active part of clutch and secondary part can engage fast behind the releasing of brake, thereby can start fast vehicle.
Along with increasing of clutch access times, clutch occurs causing clutch linkage point position to change after the wearing and tearing, carry out after the pre-oiling with 1 pair of clutch of described pre-oiling pressure value P, may not fill up oil in the oil circuit control of clutch, also might fill up already oil and active part has begun to contact with secondary part, will cause like this with described duration t(be among Fig. 2 and Fig. 3 from 0s to 0.5s) to clutch carry out the second time oil-filled after, clutch does not also arrive interlock point position as shown in Figure 2, might cross already as shown in Figure 3 interlock point position yet.Therefore, after each transmission control unit powers on, the pre-oiling pressure value P 1 of regulating clutch by carrying out following regulating step, can adapt to the current behaviour in service of clutch:
Step a carries out pre-oiling according to current clutch pre-oiling pressure value P 1 solenoidoperated cluthes;
Step b carries out the second time with described duration t solenoidoperated cluthes oil-filled, obtains for the second time engine output torque value added DeltaT2 in the Oil feeding process;
Step c, relatively whether DeltaT2 increases calibration value DeltaT with default engine output torque and equates, if equal or error then finishes regulating step in the predictive error scope; Otherwise change pre-oiling pressure value P 1; Particularly, judge the size of DeltaT2 and DeltaT, if DeltaT2＜DeltaT then continues steps d; If DeltaT2〉DeltaT then continues step e;
Steps d increases the predetermined steps long value as new pre-oiling pressure value P 1 with pre-oiling pressure value P 1, and then repeating step a is to step c;
Step e reduces the predetermined steps long value as new pre-oiling pressure value P 1 with pre-oiling pressure value P 1, and then repeating step a is 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 all can be other numerical value, to adapt to different degrees of regulation.
Take Fig. 1 to Fig. 3 as example, default engine output torque increases calibration value DeltaT=8Nm, and then the engine output torque value added shown in Fig. 1 equates with DeltaT, does not need to adjust 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, so that clutch can arrive the interlock point after oil-filled through the second time of fixing duration t, thereby clutch can engage fast after Panasonic's brake, reduces the race of engine time.Engine output torque value added shown in Fig. 3 need to reduce pre-oiling pressure value P 1 greater than 8Nm, avoids too much causing engine output torque excessive because clutch engages, and wastes energy, and also avoids further aggravating the wearing and tearing of clutch.
By the clutch pre-oiling pressure value P 1 after the adjustment of transmission control unit record, and come solenoidoperated cluthes to finish pre-oiling with the pre-oiling pressure value P 1 after adjusting, so that pre-oiling is just filled full oil in the oil circuit control of clutch after finishing, and then can arrive an interlock point position by solenoidoperated cluthes.Because the state of wear of vehicle clutch in running can not be estimated, therefore can't adapt to various states with predefined pre-oiling force value, and according to above-mentioned set-up procedure at any time clutch pre-oiling force value is adjusted the clutch pre-oiling force value that can obtain to be fit to current state, the working life that reduces wear to improve clutch.
It will be appreciated that, the method of previously described adjusting clutch pre-oiling pressure value P 1 is not only applicable in the automatic transmission clutch controlling method among the present invention, and goes for regulating in other clutch control method clutch pre-oiling force value.
Above embodiment only is used for technological scheme of the present invention is described, is not limited to protection scope of the present invention.The modification that those skilled in the art can carry out technological scheme of the present invention or equal the replacement, and do not break away from the spirit and scope of technical solution of the present invention.
Claims (5)
1. automatic transmission clutch controlling method, the pre-oiling force value that is used for regulating clutch, with the interlock point position of self-adapting detecting 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 the engine output torque value added in the acquisition Oil feeding process second time;
Step c: judge that described engine output torque value added and a default moment of torsion increase differing whether in default margin of error of calibration value; If so, then keep current pre-oiling force value; If not, then carry out steps d;
Steps d: change described pre-oiling force value, as current pre-oiling force value, and repeating said steps a is to step c with the pre-oiling force value after changing.
2. automatic transmission clutch controlling method according to claim 1 is characterized in that, in steps d:
When described engine output torque value added increases calibration value less than described moment of torsion, then described pre-oiling force value is increased the predetermined steps long value, to change described pre-oiling force value; Perhaps,
When described engine output torque value added increases calibration value greater than described moment of torsion, then described pre-oiling force value is reduced the predetermined steps long value, to change described pre-oiling force value.
3. automatic transmission clutch controlling method according to claim 2 is characterized in that, described default step value is 0.1bar.
4. automatic transmission clutch controlling method according to claim 2 is characterized in that, described default margin of error is ± 10%.
5. each described automatic transmission clutch controlling method is characterized in that according to claim 1-4, and described method is carried out 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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Cited By (11)
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| CN103277428A (en) * | 2013-05-31 | 2013-09-04 | 安徽江淮汽车股份有限公司 | Wet dual-clutch automatic transmission and precharging pressure control method thereof |
| CN103629341A (en) * | 2013-12-13 | 2014-03-12 | 安徽江淮汽车股份有限公司 | Wet-type double-clutch automatic transmission electromagnetic valve characteristic 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 |
| CN104675883A (en) * | 2013-11-29 | 2015-06-03 | 上海汽车集团股份有限公司 | Clutch control method and system |
| 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 |
| CN105422841A (en) * | 2015-11-30 | 2016-03-23 | 盛瑞传动股份有限公司 | Self-adaptation control method and system for gear shifting of automatic transmission |
| 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 |
| CN106555876A (en) * | 2015-09-29 | 2017-04-05 | 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 |
| CN106641238A (en) * | 2016-12-13 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Wet type dual-clutch transmission oil charging control method and system |
| CN111350814A (en) * | 2018-12-24 | 2020-06-30 | 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 |
| CN111853082A (en) * | 2020-06-16 | 2020-10-30 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN106555876A (en) * | 2015-09-29 | 2017-04-05 | 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 |
| CN105422841A (en) * | 2015-11-30 | 2016-03-23 | 盛瑞传动股份有限公司 | Self-adaptation control method and system for gear shifting of automatic transmission |
| 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 |
| CN106641238A (en) * | 2016-12-13 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Wet type dual-clutch transmission oil charging control method and system |
| CN111350814A (en) * | 2018-12-24 | 2020-06-30 | 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 |
| 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 |
| CN111853082A (en) * | 2020-06-16 | 2020-10-30 | 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 |
| 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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| CN103075441B (en) | 2015-12-09 |
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