CN103438124A - Method for controlling oil filling of clutches of automatic double-clutch gearbox - Google Patents
Method for controlling oil filling of clutches of automatic double-clutch gearbox Download PDFInfo
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- CN103438124A CN103438124A CN2013103797637A CN201310379763A CN103438124A CN 103438124 A CN103438124 A CN 103438124A CN 2013103797637 A CN2013103797637 A CN 2013103797637A CN 201310379763 A CN201310379763 A CN 201310379763A CN 103438124 A CN103438124 A CN 103438124A
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Abstract
The invention provides a method for controlling oil filling of clutches of an automatic double-clutch gearbox. The method comprises the step of filling oil in advance, wherein the clutches are filled with the oil in advance after pre-shifting of a target gear is finished, and the preset time is maintained; the step of filling the oil for the second time, wherein the clutches of the target gear are filled with the oil for the second time until linkage point pressure is reached; the step of maintaining the linkage point pressure, wherein the linkage point pressure of the clutches of the target gear is maintained until torque is alternated. In the step of filling the oil in advance, the current oil temperature of the gearbox is measured, and filling the oil in advance is carried out according to the current oil temperature of the gearbox. The temperature change of the oil in the gearbox is utilized for controlling the clutch oil filling process, and therefore timeliness and smoothness of clutch motions in the shifting process can be improved, and the fault rate of the automatic wet type double-clutch gearbox can be lowered.
Description
Technical field
The present invention relates to the double-clutch automatic gearbox control field.
Background technique
The dual-clutch transmission transmission device is to be connected by respectively with two input shafts of two clutches, via different output shafts, realizes torque conversion and output, thereby transmits engine power.Double clutch gearbox is multi-form according to clutch, is divided into dry dual clutch automatic transmission case and wet-type dual-clutch gearbox.The dry dual clutch automatic transmission case usually adopts the combination of Electric Machine Control mode solenoidoperated cluthes and separates; The wet-type double-clutch automatic speed-change case usually adopts the combination of hydraulic way solenoidoperated cluthes and separates.
At application number: 201210553278.2, the applying date: 2012-12-19, denomination of invention: in the Chinese invention patent application of " shift control method of wet-type dual-clutch ", by pre-hung, transition, three steps of switching, realize the stationarity that two clutch pressures replace.And, in order to guarantee the steady of transition, also to, before clutch reaches interlock point (kisspoint) pressure, carry out pre-oiling.After preacceleration inflation completes, just can carry out clutch oil-filledly for the second time, make oil pressure reach fast the interlock point pressure.But, in this patent application, do not relate to and how Oil feeding process being controlled.
At application number: 201310020809.6, the applying date: 2013-01-18, denomination of invention: in the Chinese invention patent application of " automatic transmission clutch controlling method ", adopt the thought of closed loop control, by being increased to calibration value, engine output torque value added in Oil feeding process for the second time and default engine output torque undertaken recently setting new pre-oiling force value, to guarantee that clutch arrives the interlock point according to predetermined process, reduce because clutch abrasion causes the clutch aging speed and accelerate.But, in this patent application, need at first in the stage of dispatching from the factory, to demarcate unworn clutch pre-oiling force value, then along with the wearing and tearing of clutch are adjusted the pre-oiling force value, belong to later stage remedial measure to carrying out after clutch abrasion but not preventive measure again.
Generally, demarcation to charge pressure, oil-filled time is all that the hypothesis TOT Transmission Oil Temperature is constant, then by calculating, obtain, for example, in the article of the author who publishes at " building machinery " 2012.3 first monthly magazines: Huang Heting, title " impact of the oil-filled characteristic of wet clutch on the smooth-going performance of vehicle gentle start " pointed.And in fact, while using in the city of congestion in road, speed changer can carry out the gear switching continually, make wet-type dual-clutch Engage and disengage continually, and form different friction processes, thereby cause the oil liquid temperature of speed changer sharply to raise.Although therefore in shift process, the oil-filled time is shorter, the pressure compensation problem that TOT Transmission Oil Temperature changes under the different temperatures of bringing can not be out in the cold.On the one hand, in the prior art, pre-oiling force value that the stage of dispatching from the factory demarcates still using before gearshift as initial value, and then conversely the pre-oiling force value is adjusted and revised obviously lately according to output torque in oil-filled stage for the second time, be unfavorable for timely, the stationarity of gearshift.On the other hand, in oil-filled stage for the second time, because oil temperature in shift process changes, oil-filled time of clutch and maximum charge pressure retention time also need to be changed to carry out pressure compensation, otherwise can cause Oil feeding process shakiness for the second time.Again on the other hand, clutch is oil-filled reach the interlock point pressure after, for guarantee carry out moment of torsion alternately before, clutch pressure need to be remained on the interlock point pressure near a period of time, during this period of time, also can exist oil temperature to change, can cause the fluctuation of interlock point pressure.If changing in above three phases oil temperature the pressure compensation problem of bringing is not considered, will affect promptness and the smoothness of gearshift, cause shift process to have that very significantly pause and transition in rhythm or melody sense, engine speed raise voluntarily and maybe can't accelerate, there are all multiple faultss such as abnormal sound in the trouble light flicker when only indivedual gears can travel and shift gears.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, the temperature variation of gearbox fluid is introduced in the control to the clutch Oil feeding process, to improve promptness and the smoothness of clutch operating in shift process, reduce the rate of fault of wet type double clutch automatic speed changing case.
For achieving the above object, the invention provides following technological scheme:
The oil-filled controlling method of a kind of dual-clutch transmission clutch, the step comprised has:
Pre-oiling step: after the target gear completes pre-engage a gear, clutch is carried out to pre-oiling, and keep the scheduled time;
Oil-filled step for the second time: the target gear clutch is carried out oil-filled until reach the interlock point pressure for the second time;
The interlock point pressure keeps step: keep the target gear clutch the interlock point pressure until moment of torsion alternately;
In the pre-oiling step, current TOT Transmission Oil Temperature is measured, and carried out pre-oiling according to current TOT Transmission Oil Temperature.
Preferably, in oil-filled step for the second time, oil-filled time of clutch and maximum charge pressure retention time also are corrected according to current TOT Transmission Oil Temperature.
Preferably, in the interlock point pressure keeps step, described interlock point pressure and retention time thereof also are corrected according to current TOT Transmission Oil Temperature.
Preferably, also comprise the clutch moment of torque alternate steps, in this step, the moment of torsion sum of two clutch transmission remains unchanged.
Beneficial effect of the present invention is:
In the pre-oiling stage, considered the oil temperature impact, according to oil temperature, the calibration value of dispatch from the factory calibration value or a upper gear is revised, rather than revised at the moment of torsion alternating phases, correction is shifted to an earlier date opportunity, clutch abrasion is played to preventive effect, and improved gearshift promptness and smoothness.
Further, introducing the TOT Transmission Oil Temperature factor in oil-filled step was for the second time revised oil-filled time of clutch and maximum charge pressure retention time, guaranteed Oil feeding process for the second time steadily, be conducive to improve smooth gear shifting, guarantee that clutch pressure that engine speed can be not corresponding because of the target gear is on the low side and occur that rotating speed raises voluntarily or can't hastening phenomenon.
Further, interlock point pressure and retention time thereof also are subject to the correction of TOT Transmission Oil Temperature factor, can guarantee that clutch is fully oil-filled when the interlock point, guarantee that the alternately front pressure of moment of torsion meets the demands, smooth transition.
Further, in the clutch moment of torque alternate steps, current gear, the target gear moment of torsion sum that two clutches of correspondence transmit respectively remains unchanged, and guarantees that Engine torque transits to another clutch from a clutch reposefully.
The accompanying drawing explanation
Next in connection with accompanying drawing, specific embodiments of the invention are described in further detail, wherein:
Fig. 1 is that the clutch pressure of embodiments of the invention changes schematic diagram;
Fig. 2 is the Clutch Control flow chart of embodiments of the invention.
Embodiment
In conjunction with Fig. 1, Fig. 2.Vehicle is under normal driving cycle, and the gearbox control unit can, according to parameters such as present engine accelerator open degree, the speed of a motor vehicle and vehicle operation patterns, judge whether vehicle needs to carry out gear shift.If meet shift condition, the gearbox control unit is the process of power shift under the work at present pattern according to vehicle, the select target gear, and carry out the pre-hung shelves.After the target gear completes pre-engage a gear step, the clutch corresponding to the target gear carries out pre-oiling, and keeps scheduled time T1.In the pre-oiling step, should reach the desired pressure value of original demarcation and keep under the corresponding clutch actual pressure value of target gear perfect condition, but in fact, owing to being subject to the TOT Transmission Oil Temperature variable effect, control the time T 1 of the pre-oiling carried out according to calibration value, the preliminary filling oil pressure reached is not identical with original calibration value, this just gives the correct judgement of the whole Oil feeding process of clutch, control has brought risk, therefore, in this step, measure in real time current TOT Transmission Oil Temperature and according to current TOT Transmission Oil Temperature, clutch carried out to pre-oiling, guaranteed that the actual preliminary filling oil pressure reached and the error between pre-oiling time T 1 and calibration value are in controlled range.
When clutch corresponding to target gear completes pre-oiling, the gearbox control unit starts the clutch corresponding to the target gear and carries out oil-filled (fast pressurization) step for the second time, so that the clutch oil pocket is filled rapidly, be able to interlock point (kisspoint) pressure of transmitting torque.In this process, the oil-filled time T 2 of clutch and maximum charge pressure retention time T3 are also revised according to current TOT Transmission Oil Temperature, make the pressure of clutch under condition of different temperatures obtain compensation.Because the clutch oil pocket needs a large amount of gear box oils to be filled, in order fast the clutch oil pocket to be full of, charge pressure is often much larger than the interlock point pressure, is therefore meeting maximum charge pressure after the retention time, charge pressure can, gradually to the transition of interlock point pressure, prevent and overcharge phenomenon.And after this stage increased the adjusting factor of current TOT Transmission Oil Temperature, both guaranteed that the actual interlock point pressure value reached of clutch that the target gear is corresponding conformed to calibration value, guaranteed again that the impact that can not change due to the actual oil pressure that temperature variation is brought in the retention time at maximum charge pressure produced actual overcharging or oil-filled deficiency.
Clutch is after oil-filled step completes for the second time, and the pressure of clutch, near the interlock point pressure, can meet the condition of transmitting torque.Because hardware product is as between solenoid valve, hydraulic module etc., there is some difference, for guarantee carry out moment of torsion alternately before, the pressure of clutch can remain on interlock point can transmitting torque, keep the interlock point pressure scheduled time T4 of target gear clutch until moment of torsion alternately, allows the fully oil-filled condition that meets transmitting torque of clutch.In this stage, interlock point pressure and retention time T4 thereof also need to be corrected according to current TOT Transmission Oil Temperature, to prevent that the unexpected variation due to the interlock point pressure causes moment of torsion to transmit shakiness when the moment of torsion alternate steps starts, cause gearshift pause and transition in rhythm or melody, gearshift abnormal sound or sudden engine raising speed.
In sum, in the pre-oiling step, during oil-filled step, interlock point pressure keep the step three phases for the second time, all introduced this governing factor of current TOT Transmission Oil Temperature, and played respectively good regulating effect separately in each stage.Certainly, those of ordinary skills can also be easily be incorporated into other governing factor of introducing in background technique for example in embodiments of the invention.
After the clutch linkage point pressure meets the demands, gear shift enters two clutch moment of torque alternate steps.The moment of torsion that now pressure of clutch will transmit according to clutch is distributed.The clutch pressure that the target gear is corresponding rises, and the clutch pressure that current gear is corresponding descends, and in whole alternation procedure, the moment of torsion sum of two clutch transmission remains unchanged.
After two clutch moment of torque complete alternately, the gearbox control unit sends and falls torque request to motor, and now engine speed transits to the corresponding input shaft rotating speed of target gear from current gear rotating speed, completes the engine speed synchronizing process.
Last last gear clutch separates and last gear synchronizer is thrown off, and vehicle reenters the normal driving pattern.
Although the present invention is described in conjunction with above embodiment, but the present invention is not limited to above-described embodiment, and only being subject to the restriction of claim, those of ordinary skills can easily modify to it and change, but do not leave essence design of the present invention and scope.
Claims (4)
1. the oil-filled controlling method of dual-clutch transmission clutch, the step comprised has:
Pre-oiling step: after the target gear completes pre-engage a gear, clutch is carried out to pre-oiling, and keep the scheduled time;
Oil-filled step for the second time: the target gear clutch is carried out oil-filled until reach the interlock point pressure for the second time;
The interlock point pressure keeps step: keep the target gear clutch the interlock point pressure until moment of torsion alternately;
It is characterized in that, in the pre-oiling step, current TOT Transmission Oil Temperature is measured, and carried out pre-oiling according to current TOT Transmission Oil Temperature.
2. method according to claim 1, is characterized in that, in oil-filled step for the second time, oil-filled time of clutch and maximum charge pressure retention time also are corrected according to current TOT Transmission Oil Temperature.
3. method according to claim 1 and 2, is characterized in that, in the interlock point pressure keeps step, described interlock point pressure and retention time thereof are corrected according to current TOT Transmission Oil Temperature.
4. method according to claim 1, is characterized in that, also comprises the clutch moment of torque alternate steps, and in this step, the moment of torsion sum of two clutch transmission remains unchanged.
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| CN201310379763.7A CN103438124B (en) | 2013-08-27 | 2013-08-27 | The oil-filled controlling method of dual-clutch transmission clutch |
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| CN105134939A (en) * | 2014-06-04 | 2015-12-09 | 上海通用汽车有限公司 | Electronic hydraulic control system and clutch gearbox system with same |
| 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 |
| CN105570448A (en) * | 2016-01-15 | 2016-05-11 | 上海汽车变速器有限公司 | Low-temperature gear shifting optimized control method of wet type double-clutch transmission |
| CN105644562A (en) * | 2016-02-25 | 2016-06-08 | 安徽江淮汽车股份有限公司 | Double-clutch automatic transmission creeping control method |
| CN105805186A (en) * | 2016-04-26 | 2016-07-27 | 中国第汽车股份有限公司 | Oil charging accurate control method for wet clutch |
| CN105862949A (en) * | 2016-04-15 | 2016-08-17 | 山推工程机械股份有限公司 | Electrically controlled pressure regulation controlling method for bulldozer |
| 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 |
| CN107035855A (en) * | 2016-12-20 | 2017-08-11 | 安徽江淮汽车集团股份有限公司 | A kind of wet-type dual-clutch main oil pressure control method and system |
| CN107542914A (en) * | 2017-10-17 | 2018-01-05 | 安徽江淮汽车集团股份有限公司 | A kind of wet dual-clutch automatic transmission is stepped on the gas the control method of downshift |
| CN109027218A (en) * | 2018-08-21 | 2018-12-18 | 重庆长安汽车股份有限公司 | The starting control method of wet-type dual-clutch transmission |
| CN109424737A (en) * | 2017-09-01 | 2019-03-05 | 上海汽车集团股份有限公司 | A kind of method and device of double clutch automatic transmission shift controls |
| CN111981058A (en) * | 2019-05-21 | 2020-11-24 | 上海汽车集团股份有限公司 | Wet clutch pressure control method and system |
| CN112065881A (en) * | 2020-08-17 | 2020-12-11 | 中国第一汽车股份有限公司 | Self-learning method for clutch oil filling |
| CN112112908A (en) * | 2020-10-28 | 2020-12-22 | 北京航空航天大学 | Method for preventing automatic transmission clutch from being overcharged |
| CN112709812A (en) * | 2019-10-24 | 2021-04-27 | 上汽通用汽车有限公司 | Clutch control self-learning method of gearbox, controller, gearbox and vehicle |
| CN113048161A (en) * | 2021-03-08 | 2021-06-29 | 重庆青山工业有限责任公司 | Regulation control method for oil filling process of wet DCT (double clutch transmission) clutch |
| CN113075890A (en) * | 2020-01-06 | 2021-07-06 | 广州汽车集团股份有限公司 | Double-clutch oil filling control method and system, computer equipment and medium |
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| CN114483819A (en) * | 2021-12-14 | 2022-05-13 | 中国北方车辆研究所 | Oil charging pressure compensation method for automatic transmission clutch under high-temperature working condition |
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| CN114962634A (en) * | 2022-07-29 | 2022-08-30 | 盛瑞传动股份有限公司 | Clutch oil charge control method and device, gearbox controller and storage medium |
| CN116085402A (en) * | 2023-04-06 | 2023-05-09 | 蜂巢传动科技邳州有限公司 | Oil charge control method and device, electronic equipment and vehicle |
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