CN103438124B - The oil-filled controlling method of dual-clutch transmission clutch - Google Patents
The oil-filled controlling method of dual-clutch transmission clutch Download PDFInfo
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- CN103438124B CN103438124B CN201310379763.7A CN201310379763A CN103438124B CN 103438124 B CN103438124 B CN 103438124B CN 201310379763 A CN201310379763 A CN 201310379763A CN 103438124 B CN103438124 B CN 103438124B
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Abstract
The invention provides the oil-filled controlling method of a kind of dual-clutch transmission clutch, the step comprised has: pre-oiling step: after target gear completes pre-engage a gear, carry out pre-oiling to clutch, and keep the scheduled time; The oil-filled step of second time: second time carried out to target gear clutch oil-filled until reach interlock point pressure; Interlock point pressure keeps step: keep the interlock point pressure of target gear clutch until moment of torsion replaces; In pre-oiling step, current TOT Transmission Oil Temperature is measured, and carry out pre-oiling according to current TOT Transmission Oil Temperature.The temperature variation of gearbox fluid is introduced in the control to clutch Oil feeding process by the present invention, can improve promptness and the smoothness of clutch operating in shift process, reduces the rate of fault of wet type double clutch automatic speed changing case.
Description
Technical field
The present invention relates to double-clutch automatic gearbox control field.
Background technique
Dual-clutch transmission transmission device is connected by two clutches respectively with two input shafts, realizes torque conversion and output via different output shaft, thus transmit engine power.Multi-form according to clutch of double clutch gearbox, is divided into dry dual clutch automatic transmission case and wet-type dual-clutch gearbox.Dry dual clutch automatic transmission case usually adopts Electric Machine Control mode solenoidoperated cluthes to combine and is separated; Wet-type double-clutch automatic speed-change case then adopts combination and the separation of hydraulic way solenoidoperated cluthes usually.
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 ", realize by pre-hung, transition, switching three steps the stationarity that two clutch pressures replace.And in order to ensure the steady of transition, also before clutch reaches interlock point (kisspoint) pressure, pre-oiling to be carried out.After preacceleration inflation completes, just can carry out second time to clutch oil-filled, make oil pressure reach interlock point pressure fast.But, do not relate in this patent application 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, contrast set new pre-oiling force value by increasing calibration value to engine output torque value added in second time Oil feeding process with the engine output torque preset, to ensure that clutch arrives interlock point according to predetermined process, reduce because clutch abrasion causes clutch aging speed to accelerate.But, in the disclosure in this patent, needing first to demarcate unworn clutch pre-oiling force value in the stage of dispatching from the factory, then along with the wearing and tearing of clutch adjust pre-oiling force value, belonging to the later stage remedial measure to carrying out after clutch abrasion but not preventive measure again.
Generally, all that hypothesis TOT Transmission Oil Temperature is constant to charge pressure, the demarcation of oil-filled time, then obtained by calculating, such as, pointed by the article of the author that first monthly magazine of " building machinery " 2012.3 is published: Huang Heting, title " the oil-filled characteristic of wet clutch is on the impact of the smooth-going performance of vehicle gentle start ".And in fact, when using in the city of congestion in road, speed changer can carry out gear switching continually, make wet-type dual-clutch Engage and disengage continually, and form different friction processes, thus 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 brought can not be out in the cold.On the one hand, in the prior art, still using the pre-oiling force value of stage demarcation of dispatching from the factory as initial value before gearshift, and then it is obviously late to carry out adjustment correction to pre-oiling force value in the second time oil-filled stage conversely according to output torque, is unfavorable for timely, the stationarity of shifting gears.On the other hand, in the second time oil-filled stage, due to oil temperature change in shift process, clutch oil-filled time and maximum charge pressure retention time also need to be changed to carry out pressure compensation, otherwise second time Oil feeding process can be caused unstable.Again on the other hand, clutch is oil-filled reach interlock point pressure after, in order to ensure carry out moment of torsion alternately before, need clutch pressure to remain near interlock point pressure a period of time, during this period of time, also can there is oil temperature change, the fluctuation of interlock point pressure can be caused.If change in above three phases oil temperature the pressure compensation problem brought not to be considered, promptness and the smoothness of gearshift will be affected, cause shift process exist obviously pause and transition in rhythm or melody sense, engine speed raise voluntarily maybe cannot accelerate, there is all multiple faultss such as abnormal sound when only indivedual gear can travel and shift gears in trouble light flicker.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, the temperature variation of gearbox fluid is introduced in the control to 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 target gear completes pre-engage a gear, pre-oiling is carried out to clutch, and keep the scheduled time;
The oil-filled step of second time: second time carried out to target gear clutch oil-filled until reach interlock point pressure;
Interlock point pressure keeps step: keep the interlock point pressure of target gear clutch until moment of torsion replaces;
In pre-oiling step, current TOT Transmission Oil Temperature is measured, and carry out pre-oiling according to current TOT Transmission Oil Temperature.
Preferably, in the oil-filled step of second time, clutch oil-filled time and maximum charge pressure retention time are also corrected according to current TOT Transmission Oil Temperature.
Preferably, keep in step at interlock point pressure, described interlock point pressure and retention time thereof are also corrected according to current TOT Transmission Oil Temperature.
Preferably, also comprise 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, namely consider oil temperature impact, revise according to the calibration value of oil temperature to dispatch from the factory calibration value or a upper gear, instead of revise at moment of torsion alternating phases, correction is shifted to an earlier date opportunity, preventive effect is played to clutch abrasion, and improve gearshift promptness and smoothness.
Further, in the oil-filled step of second time, introduce TOT Transmission Oil Temperature factor revise clutch oil-filled time and maximum charge pressure retention time, ensure that the steady of second time Oil feeding process, be conducive to improving smooth gear shifting, ensure that engine speed can not be on the low side and occur that rotating speed raises or cannot hastening phenomenon voluntarily because of the clutch pressure that target gear is corresponding.
Further, interlock point pressure and retention time thereof are also subject to the correction of TOT Transmission Oil Temperature factor, can ensure that clutch is fully oil-filled when linking point, guarantee that pressure meets the demands before moment of torsion alternately, smooth transition.
Further, in clutch moment of torque alternate steps, the moment of torsion sum that two clutches that current gear, target gear are corresponding respectively transmit remains unchanged, and ensures that Engine torque transits to another clutch from a clutch reposefully.
Accompanying drawing explanation
Next will be described in further detail specific embodiments of the invention by reference to the accompanying drawings, wherein:
Fig. 1 is the clutch pressure change schematic diagram of embodiments of the invention;
Fig. 2 is the Clutch Control flow chart of embodiments of the invention.
Embodiment
Composition graphs 1, Fig. 2.Vehicle is under normal driving cycle, and gear box control unit according to parameters such as present engine accelerator open degree, the speed of a motor vehicle and vehicle operation patterns, can judge that vehicle is the need of carrying out gear shift.If meet shift condition, gear box control unit according to the process of power shift of vehicle under current operation mode, select target gear, and carry out pre-hung shelves.After target gear completes pre-engage a gear step, the clutch corresponding to target gear carries out pre-oiling, and keeps scheduled time T1.In pre-oiling step, the corresponding clutch actual pressure value of target gear ideally should reach the desired pressure value of original demarcation and keep, but in fact, owing to being subject to TOT Transmission Oil Temperature variable effect, according to calibration value control the time T1 of the pre-oiling carried out, 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 brings risk, therefore, in this step, the current TOT Transmission Oil Temperature of real-time measurement also carries out pre-oiling according to current TOT Transmission Oil Temperature to clutch, ensure that the preliminary filling oil pressure that reality reaches and the error between pre-oiling time T1 and calibration value are in controlled range.
When the clutch that target gear is corresponding completes pre-oiling, gear box control unit starts the clutch corresponding to target gear and carries out second time oil-filled (fast pressurization) step, to make clutch oil pocket be filled rapidly, reaching can interlock point (kisspoint) pressure of transmitting torque.In the process, clutch oil-filled time T2 and maximum charge pressure retention time T3 also revises according to current TOT Transmission Oil Temperature, makes the pressure of clutch under condition of different temperatures obtain compensation.Because clutch oil pocket needs a large amount of gear box oils to fill, in order to be full of by clutch oil pocket fast, charge pressure is often much larger than interlock point pressure, therefore after meeting the maximum charge pressure retention time, charge pressure gradually to the transition of interlock point pressure, can prevent and overcharge phenomenon.And after this stage adds the regulate factors of current TOT Transmission Oil Temperature, both ensure that the actual interlock reached of clutch that target gear is corresponding pressed force value and conforms to calibration value, and in turn ensure that the impact of the actual oil pressure change that can not bring due to temperature variation within the maximum charge pressure retention time and produce actual overcharging or oil-filled deficiency.
After the oil-filled step of clutch second time completes, the pressure of clutch is near 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, in order to ensure before carrying out moment of torsion and replacing, the pressure of clutch can remain on interlock point and 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 meeting 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 when moment of torsion alternate steps starts, due to the unexpected change of point pressure of linking, to cause moment of torsion to transmit unstable, causes gearshift pause and transition in rhythm or melody, gearshift abnormal sound or the unexpected raising speed of motor.
In sum, keep, in step three phases, all introducing this governing factor of current TOT Transmission Oil Temperature, and serving respective good regulating effect respectively in each stage at pre-oiling step, the oil-filled step of second time, interlock point pressure.Certainly, other governing factor such as, introduced in background technique can also be incorporated in embodiments of the invention by those of ordinary skill in the art easily.
After 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 distributes.The clutch pressure that target gear is corresponding rises, the clutch pressure decline that current gear is corresponding, and in whole alternation procedure, the moment of torsion sum of two clutch transmission remains unchanged.
When two clutch moment of torque complete alternately, gear box control unit sends to motor and falls torque request, and now engine speed transits to input shaft rotating speed corresponding to target gear from current gear rotating speed, completes engine speed synchronizing process.
Last last gear clutch is separated and last gear synchronizer is thrown off, and vehicle reenters 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 by the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea 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 target gear completes pre-engage a gear, pre-oiling is carried out to clutch, and keep the scheduled time;
The oil-filled step of second time: second time carried out to target gear clutch oil-filled until reach interlock point pressure;
Interlock point pressure keeps step: keep the interlock point pressure of target gear clutch until moment of torsion replaces;
It is characterized in that, in pre-oiling step, current TOT Transmission Oil Temperature is measured, and carry out pre-oiling according to current TOT Transmission Oil Temperature.
2. method according to claim 1, is characterized in that, in the oil-filled step of second time, clutch oil-filled time and maximum charge pressure retention time are also corrected according to current TOT Transmission Oil Temperature.
3. method according to claim 1 and 2, is characterized in that, keep in step at interlock point pressure, 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 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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| CN201310379763.7A CN103438124B (en) | 2013-08-27 | 2013-08-27 | The oil-filled controlling method of dual-clutch transmission clutch |
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| CN103438124B true CN103438124B (en) | 2016-03-30 |
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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 |
| 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 |
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| CN105644562B (en) * | 2016-02-25 | 2018-03-20 | 安徽江淮汽车集团股份有限公司 | A kind of dual-clutch transmission wriggling control method |
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| CN105805186B (en) * | 2016-04-26 | 2018-07-20 | 中国第一汽车股份有限公司 | The oil-filled accuracy control method of wet clutch |
| 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 |
| CN107035855B (en) * | 2016-12-20 | 2018-11-06 | 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 |
| CN109424737B (en) * | 2017-09-01 | 2020-08-28 | 上海汽车集团股份有限公司 | Method and device for gear shifting control of dual-clutch automatic transmission |
| 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 |
| CN111981058B (en) * | 2019-05-21 | 2022-03-25 | 上海汽车集团股份有限公司 | Wet clutch pressure control method and system |
| CN112709812B (en) * | 2019-10-24 | 2022-04-19 | 上汽通用汽车有限公司 | Clutch control self-learning method of gearbox, controller, gearbox and vehicle |
| CN113075890B (en) * | 2020-01-06 | 2022-07-15 | 广州汽车集团股份有限公司 | Double-clutch oil filling control method and system, computer equipment and medium |
| CN112065881B (en) * | 2020-08-17 | 2022-10-28 | 中国第一汽车股份有限公司 | Self-learning method for clutch oil filling |
| CN112112908B (en) * | 2020-10-28 | 2021-09-07 | 北京航空航天大学 | Method for preventing automatic transmission clutch from being overcharged |
| CN114427580B (en) * | 2020-10-29 | 2024-02-23 | 广州汽车集团股份有限公司 | Self-adaptive control method and device for oil filling of synchronizer |
| CN113048161B (en) * | 2021-03-08 | 2022-07-19 | 重庆青山工业有限责任公司 | Regulation control method for oil filling process of wet DCT (dual clutch transmission) clutch |
| CN113074194B (en) * | 2021-03-26 | 2022-03-08 | 湖南奕普汽车科技有限公司 | Automatic stepless transmission clutch oil filling and semi-linkage point self-learning method |
| 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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