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Pressure control method and identification system of pressure control valve inside hydraulic system of transmission

A technology of transmission control and pressure control, which is applied in the direction of transmission control, valve operation/release device, valve details, etc. It can solve the problems of low control accuracy and poor interchangeability, so as to ensure control accuracy, improve control efficiency, The effect of improving versatility and interchangeability

Active Publication Date: 2012-11-07
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low control precision and poor interchangeability existing in the pressure control method of the pressure control valve, and to provide a pressure control valve in the hydraulic system of the transmission that can automatically correct the output pressure and realize high-precision pressure control. Valve pressure control method

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  • Pressure control method and identification system of pressure control valve inside hydraulic system of transmission

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] The control method of an electromagnetically controlled pressure control valve of the present invention is first to identify the quality and performance of the valve through a quality identification system on the production line, in addition to the conventional detection of content such as pipeline leakage, resistance, etc. In addition, it is particularly necessary to detect the corresponding output pressure of the valve under a certain input current. In order to complete the quality appraisal of the valve, the quality appraisal system adopted in the present invention is as follows: figure 1 As shown, it includes a preparatory workstation 1, a functional and quality appraisal workstation 2, a bench control system 3, a data acquisition system 4, and a central control and data processing system 5. The preparatory workstation first appraises the appearance of the pr...

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Abstract

The invention discloses a pressure control method and an identification system of a pressure control valve inside a hydraulic system of a transmission. The pressure control method comprises the following steps of: increasing and decreasing currents of a fixed difference value I delta are output to the pressure control valve through the functions of the quality identification system and a quality identification work station; a data acquisition system back feeds a value-added data table and a value-reduced data table formed by the output pressure of a valve which corresponds to the increasing and decreasing currents to a central control and data processing system and stores in an electronic storage mould of the pressure control valve after the programming and the computation of the central control and data processing system; and a TCU (Transmission Control Unit) controls the pressure output of the valve by using the data substituting for the standard theory data of the valve and also detects and corrects the actual output pressure of the valve, therefore the manufacture errors of the valve and the influence of abrasion during use on pressure control precision can be eliminated. The invention enhances the interchangeability of the valve and reduces the manufacture cost of the hydraulic system.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a method for controlling the output pressure of a variable flow solenoid valve of a transmission hydraulic control system by using actual quality characteristic parameters of a valve body and a corresponding quality characteristic identification system. Background technique [0002] In the hydraulic control system, a variable flow solenoid valve (VBS) can usually be used to provide a stable pressure for the system, but the output pressure of the valve body controlled by the variable flow solenoid valve is affected by the manufacturing of the valve body and the variable flow solenoid valve. The influence of the error is large, and the output pressure will have a large change, and the precision of the pressure control is not high. Therefore, it is difficult to meet the occasions that have high requirements for the precision of the pressure control. For example: in the hyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/06F16H61/00
Inventor 艾伦·莫里斯陈勇赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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