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Clutch and method for searching half-engagement point of clutch

A half-joint, clutch technology, applied in clutches, fluid-driven clutches, non-mechanical-driven clutches, etc., can solve the problems affecting the drag torque and the limited accuracy of KP point selection.

Active Publication Date: 2021-03-30
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And considering that the tolerance accumulation of individual clutches will affect the magnitude of the drag torque, the selection accuracy of the KP point is limited

Method used

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  • Clutch and method for searching half-engagement point of clutch
  • Clutch and method for searching half-engagement point of clutch
  • Clutch and method for searching half-engagement point of clutch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] see figure 2 As shown, a clutch of the present invention is schematically shown, which includes an outer hub 10 , a main hub 20 , a friction plate set 30 , a piston 40 , and a balance piston 50 . Wherein, the friction plate set 30 is connected in the outer hub 10, the piston 40 is axially slidably connected to the main hub 20 to compress or loosen the friction plate set 30, and the balance piston 50 Connected to the main hub 20, a first sealing ring 43 and a second sealing ring 44 are provided between the piston 40 and the main hub 20, so that the piston 40 and the main hub 20 are interference-sealed, A pressure chamber 41 is formed between the piston 40 and the main hub 20, the balance piston 50, the main hub 20 and the piston 40 enclose a balance chamber 42, the balance piston 50 and the piston 40 A return spring set 80 is provided therebetween, and the piston 40 can abut against and compress the return spring set 80 when it moves axially toward the friction plate s...

Embodiment 2

[0059] see image 3 , schematically shows another clutch of the present invention, the difference between the clutch of this embodiment and the first embodiment is that the clutch in this embodiment also includes a displacement detection device 60 for detecting the axial displacement of the piston , and a pressure detection device 70 for detecting the oil pressure of the pressure chamber.

[0060] see Image 6 , schematically shows another method for finding the half-engagement point of the clutch in the present invention, which is applicable to the clutch in the second embodiment, and is different from the method for finding the half-engagement point of the clutch in the first embodiment. The method for finding the half-engagement point of the clutch in the example can also be applied to the use of the vehicle. Before the step S1, it also includes a step S0: judging whether the conditions for entering the half-engagement point self-learning are met: obtaining the idle time o...

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PUM

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Abstract

The invention relates to the technical field of automobile clutch control, and discloses a clutch and a method for searching a half-engagement point of the clutch. The clutch comprises an outer hub, amain hub, a friction plate group, a piston and a balance piston, wherein a return spring set is arranged between the balance piston and the piston, and an elastic piece is arranged on the path wherethe piston pushes the friction plate set to axially move. The method for searching the half-engagement point of the clutch comprises the steps that a pressure cavity is filled with oil; the pressure of the pressure cavity and the displacement of the piston are detected in real time and recorded; drawing is carried out to form a spring stiffness curve; and a pressure point corresponding to a breakpoint formed by spring rigidity change is read, and whether the pressure point is the half-engagement point is judged. The method can enable the searching of the half-engagement point to be more accurate and visual, facilitates the improvement of the control precision of the clutch and the improvement of the gear shifting smoothness, and meanwhile, can reduce the searching difficulty of a KP point, improves the testing efficiency, and reduces the cost.

Description

technical field [0001] The invention relates to the technical field of automobile clutch control, in particular to a clutch and a method for finding a half-engagement point of the clutch. Background technique [0002] At present, automatic transmissions are widely used, among which hydraulic electronically controlled automatic transmissions (abbreviated as AT) and dual-clutch automatic transmissions (abbreviated as DCT) account for a relatively large proportion. The wet clutch is an important actuator for gear shifting. The control accuracy of the wet clutch directly affects the quality of the gear shifting process, and has an impact on improving efficiency and reducing fuel consumption. A wet clutch is generally composed of a friction plate set, a piston that pushes and compresses the friction plate set, and a return spring. Through precise control of the pressure of the wet clutch, continuous shifting operations without interruption of power can be realized. The precise c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D25/0638F16D48/06G01M5/00
CPCF16D25/0638F16D48/06G01M5/0041F16D2500/1026F16D2500/10412F16D2500/1045F16D2500/1107F16D2500/50266F16D2500/50248
Inventor 王泽伦张新桂余子林凌晓明周友刘维
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD