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Wet dual-clutch automatic transmission and precharging pressure control method thereof

A wet dual-clutch, automatic transmission technology, applied in the direction of clutches, mechanical equipment, etc., can solve the problems of affecting the drivability of the whole vehicle, slow clutch pressure, affecting the response speed of clutch transmission torque, etc., to achieve a wide range of applicable temperature and fast response , easy to control the effect

Active Publication Date: 2013-09-04
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gap between the internal hydraulic oil cavity of the clutch and the friction plate of the clutch will affect the response speed of the torque transmitted by the clutch
If the clutch is not pre-charged and controlled before the clutch transmits torque, the clutch pressure will build up slowly during the actual work of the clutch, which will affect the drivability of the vehicle

Method used

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  • Wet dual-clutch automatic transmission and precharging pressure control method thereof
  • Wet dual-clutch automatic transmission and precharging pressure control method thereof
  • Wet dual-clutch automatic transmission and precharging pressure control method thereof

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] figure 1 Shows the working flow diagram of the pre-charging control method of the wet dual-clutch automatic transmission according to the present invention, as figure 1 As shown, the pre-charging control method of the wet dual-clutch automatic transmission includes the following steps:

[0038] Step 1: Pre-fill the wet dual clutch so that the actual expected oil filling pressure is greater than the pressure at the coupling point of the clutch transmission torque;

[0039] Step 1: Prefill the wet dual clutch with oil;

[0040] S...

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Abstract

The invention discloses a wet dual-clutch automatic transmission and a precharging pressure control method thereof. The control method includes the steps: 1, performing oil precharging on duel wet clutches; 2, acquiring clutch torque transmission combination point pressure P0 and oil precharging pressure P1 according to acquired transmission oil temperature; 3, acquiring actual expected oil charging pressure P4 according to the formula that P4=P0+P1; 4, loading electromagnetic valve current corresponding to the P4 to an electromagnetic valve of the clutches according to the actual expected oil charging pressure P4; 5, measuring actual pressure P of the clutches, judging difference between the actual pressure P of the clutches and the clutch torque transmission combination point pressure P0 is within a preset error range or not, if so, executing a step 6, and otherwise, subtracting a fixed pressure value delta P from the actual expected oil charging pressure P4, and then executing the step 4; and 6, finishing oil charging. During oil precharging of the clutches, oil can be charged into a hydraulic oil chamber of each clutch quickly, oil pressure is established, conditions for torque transmission are satisfied, and response is rapid.

Description

technical field [0001] The invention relates to the field of clutch control, in particular to a wet double-clutch automatic transmission and a pre-charging control method thereof. Background technique [0002] The wet dual-clutch automatic transmission includes two clutches, which are respectively connected to two input shafts, and the odd-numbered and even-numbered gears of the transmission are respectively distributed on the two input shafts. The coupling and disengagement of the two clutches are controlled by oil pressure, so as to realize torque transmission and disconnection. [0003] The wet double clutch is mainly composed of two concentric clutches, which can be divided into inner clutches and outer clutches according to the radius of the friction plates of the clutches. The two clutches are normally open, that is, there is a certain gap between the friction plates of the clutches. During operation, the pressure generated by the hydraulic oil makes the clutch fricti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D48/02
Inventor 黄孝奎张友皇
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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