Semi joint point judgment method and system of hydraulic automatic transmission clutch

A technology of automatic transmission and semi-joint point, which is applied in clutches, components with teeth, transmission control, etc., can solve problems such as inaccurate clutch half-joint points, and achieve the elimination of solenoid valve hysteresis, accurate positioning, and reduced charging. The effect of oil time

Active Publication Date: 2017-12-22
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent document does not consider the influence of transmission oil temperature and other fact

Method used

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  • Semi joint point judgment method and system of hydraulic automatic transmission clutch
  • Semi joint point judgment method and system of hydraulic automatic transmission clutch
  • Semi joint point judgment method and system of hydraulic automatic transmission clutch

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Embodiment Construction

[0017] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0018] figure 1 It is a schematic flowchart of a method for judging a half-engagement point of a hydraulic automatic transmission clutch provided by an embodiment of the present invention; figure 2 The principle diagram of the method for judging the half-engagement point of the hydraulic automatic transmission clutch provided by the embodiment of the present invention; image 3 The structural block diagram of the system for judging the half-engagement point of the hydraulic automatic transmission clutch provided by the embodiment of the present invention.

[0019] Such as figure 1 As shown, the embodiment of the present invention provides a method for judging the half-engagement point of the hydraulic automatic transmission clutch, including:

[0020] S

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Abstract

The invention provides a semi joint point judgment method of a hydraulic automatic transmission clutch. The method includes the steps that when a gear shifting requirement is detected, oil is inflated into a clutch with large pressure P1, and the actual clutch pressure and the turbine rotating speed change rate values at all moments are recorded; when the actual clutch pressure slowly rises along with time, the clutch pressure is reduced to P2, and oil inflation is continuously carried out; when the actual oil pressure reaches the preset scale value of P2, the P2 is gradually increased with delta P, and when the turbine rotating speed change rate becomes a negative value, the clutch pressure at the time is recorded and is semi joint point pressure. The invention further provides a semi joint point judgment system of the hydraulic automatic transmission clutch. By means of the semi joint point judgment method of the hydraulic automatic transmission clutch, quick and accurate pressure response in the clutch oil inflation process can be achieved, and impact caused by clutch pressure overshooting can be avoided.

Description

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Claims

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Application Information

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Owner CHINA FIRST AUTOMOBILE
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