Automobile brake system high-speed switch valve development test method

Abstract

The invention discloses an automobile brake system high-speed switch valve development test method. A test tool of a high-speed switch valve, an oil tank and a temperature sensor are fixedly installedin a high-low temperature environment box. The oil tank is connected with an inlet of the variable pump through the inlet filter; an outlet of the variable pump is connected with an inlet of the testtool through a throttle valve; an overflow valve and an energy accumulator are connected and installed on a pipeline between the throttle valve and the outlet of the variable pump, a pressure sensorand a flow sensor are connected and installed on a pipeline between inlets of the throttle valve testing tools, and an outlet of each testing tool is connected back to the oil tank after sequentiallypassing through a pneumatic ball valve and an outlet filter. The flexibility of development and test of the high-speed switch valve is improved, the test range is widened, and the test cost is reduced; the testing method is simple, feasible, small in debugging workload and high in testing efficiency, provides data reference for algorithm development of an electro-hydraulic control system, and hasimportant significance in improving pressure control precision and reducing product noise.

Description

technical field [0001] The invention relates to a component development and testing method in the technical field of development and testing of an automobile braking system, in particular, a development and testing method for a high-speed switching valve of an automobile braking system is designed. Background technique [0002] In recent years, with the continuous development of active safety technology, electro-hydraulic control braking systems (such as ABS, ESC, EHB, etc.) have been widely used in automobile braking systems. Because of its simple structure and low cost, the high-speed switching valve has become one of the core components of the electro-hydraulic brake control system. In the past, high-speed on-off valves used low-frequency PWM control, and the flow through the valve port was adjusted by frequent opening and closing of the valve core. This pressure control method is simple, but the accuracy is not high; and the valve core is frequently opened and closed. A...

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Problems solved by technology

[0007] 1. Use the air pressure detection system in the high-speed switch valve production line for testing, but in actual use, the test medium flowing through the high-speed switch valve is brake fluid; due to the different characteristics of gas and liquid as test media, it is difficult for the air pressure detection system to simulate The performance of the high-speed switching valve in the actual hydraulic environment greatly reduces the reliability of the test data;

[0008] 2. Rivet the high-speed switch valve to be verified into the HCU (hydraulic control unit) assembly, and then conduct the test on a professional HCU test system; due to the difference in test requirements between a single high-speed switch valve and the HCU assembly, it usually requires The modification of the test equipment for the HCU assembly prolongs the test development cycle; secondly, because this test method can only be tested with a high-speed switch valve that is riveted into the form of an HCU assembly, it cannot be tested with a single high-speed switch valve, increasing In addition, because the HCU assembly test equipment lacks a professional single high-speed switch valve test program, the test personnel can only repeatedly modify the test software code according to the test objectives and test conditions to conduct tests, which greatly reduces the labor intensity. improved testing efficiency;

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