PI test method for single valve in ESC assembly and electronic stability control system

Abstract

The invention provides a PI test method for a single valve in an ESC assembly and an electronic stability control system. The PI test method for the single valve in the ESC assembly comprises the steps that a motor is started, an oil supply valve is opened, a pressure regulating valve is closed, a brake cylinder is made to supply a liquid to the ESC, and the ESC is controlled to carry out active pressure buildup. The duty ratio of a first pressure increasing valve to be detected is controlled to be a first interval, and the pressure difference between the front end and the rear end of the first pressure increasing valve is obtained through a pressure detection device; and the pressure differences of the first pressure increasing valve under different duty ratios in the first interval are respectively recorded to obtain a PI curve of the first pressure increasing valve. In the invention, according to the active pressure buildup function of the ESC, the motor rotates to drive the piston of a plunger pump to move to build the pressure, and then corresponding single valves in the tested assembly are sequentially controlled so that the PI automatic test can be realized, excessive manual participation is not needed, and the test efficiency and accuracy of the ESC assembly PI are greatly improved.

Description

technical field [0001] The invention relates to the technical field of vehicle safety, in particular to a PI test method for a single valve in an ESC assembly and an electronic stability control system. Background technique [0002] With the development and popularization of the automobile industry, the stability of automobile chassis electronic products is also very important. Among them, the overall control effect of ESC products on the vehicle has also received special attention. Since the control effect of ESC products on the vehicle is mainly based on the accuracy of the single-valve PI written in the software in the ESC assembly, and there is currently no fast and effective method for testing the single-valve PI test method in the ESC assembly in the entire industry, so how to quickly Efficient testing of the single-valve PI in the ESC assembly is also an urgent problem to be solved in the industry. [0003] At present, the routine test method for single-valve PI in ...

AI Technical Summary

Problems solved by technology

[0003] At present, the routine test method for single-valve PI in the ESC assembly is mostly the manual test method, mainly through the manual connection of the test pipeline by the tester. Since there are 6 single valves in the ESC assembly (2 pressure limiting valves, 4 Pressure valve) needs to be tested, after each single valve test is completed, the tester needs to manually replace the test pipeline, so the overall test cycle will be very long, affecting the test efficiency of the entire PI

Since testers need to frequently disassemble and assemble test pipelines, and there is no guarantee that the installation positions will be exactly the same each time, the overall test accuracy of the conventional manual test method is low, and the conventional manual test method requires the participation of an external power source

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