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Oil charging accurate control method for wet clutch

A wet clutch, precise control technology, applied in clutch, transmission control, components with teeth, etc., can solve the problem of not considering the influence of oil filling pressure and filling time, not considering the influence of solenoid valve current hysteresis, etc. Achieve the effect of shortening the oil filling time, fast and accurate clutch oil filling process, and improving the response speed

Active Publication Date: 2016-07-27
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent application does not consider the current hysteresis of the solenoid valve and the influence of hydraulic oil flow on the resistance of the solenoid valve spool; the entire control process does not consider the influence of the oil filling pressure on the oil filling time

Method used

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  • Oil charging accurate control method for wet clutch
  • Oil charging accurate control method for wet clutch
  • Oil charging accurate control method for wet clutch

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] exist figure 1 In the process, the whole filling process is divided into four stages:

[0023] Stage 1: Quickly fill the clutch with oil filling pressure P 1 =P 0 +ΔP 1 , P 0 is the final target pressure of the clutch, ΔP 1 It is an additional command pressure added on the basis of the target pressure in order to realize fast oil filling and make the clutch pressure build up quickly. Different gearbox oil temperatures and different shift types will affect the effect of quick oil filling, so the pressure can be obtained from the table according to the gearbox oil temperature and shift type, for example, as shown in the table below; the oil filling time is based on the current system pressure Determined with the shift type, this stage is mainly to improve the response speed of the solenoid valve,

[0024] -30℃△P 1 check table

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Abstract

The invention relates to an oil charging accurate control method for a clutch in the gear shifting process of a wet double-clutch automatic transmission. The oil charging process of the clutch is divided into four stages. In the first stage, oil is rapidly charged into the clutch, the oil charging pressure satisfies the equation that P1=P0+delta P1, P0 is the target pressure, and the most appropriate delta P1 value under each oil temperature and gear shifting type is found out through an experiment mode by considering the influences of the oil temperature of a gear box and the gear shifting type. In the second stage, oil charging compensation is carried out on the clutch subjected to rapid oil charging, the oil charging pressure satisfies the equation that P2=P0+delta P2, and the most appropriate delta P2 value under each gear shifting type and system pressure is found out through an experiment mode by considering the influences of the gear shifting type and system pressure. In the third stage, oil charging waiting is carried out on the clutch, the oil charging pressure satisfies the equation that P3=P0, and the third stage is ended when the pressure of the clutch reaches 95% of the target pressure. In the fourth stage, oil charging is finished. By controlling the pressure of each stage, rapid and accurate response of the pressure of the oil charging process of the clutch can be realized, and impact caused by pressure overshoot of the clutch is avoided.

Description

technical field [0001] The invention relates to the technical field of transmission automatic control, and relates to a method for accurately controlling clutch oil filling of a wet dual-clutch automatic transmission. Background technique [0002] The wet dual-clutch automatic transmission realizes the engagement and separation of the clutch by controlling the oil filling and oil draining of the clutch, and then realizes the gear shifting of the transmission. The quality of the oil filling and oil draining process of the clutch directly affects the shifting quality. Excessive clutch oil filling will cause shift shock and affect the service life of the clutch. Too low oil filling will lead to slow response and increased engine speed when shifting gears. [0003] In the Chinese invention patent application with publication number CN103089986A, title of invention: "Automatic Transmission Clutch Control Method", the clutch reaches the state of the linkage point by filling the cl...

Claims

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Application Information

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IPC IPC(8): F16D48/02F16H61/06
CPCF16D48/02F16H61/06F16H2061/062
Inventor 曹龙熊杰赵彬张广辉张荣辉
Owner CHINA FIRST AUTOMOBILE
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