Differential pressure flow testing device for electromagnetic valve of automobile composite braking system

Abstract

The invention discloses a differential pressure flow testing device for an electromagnetic valve of an automobile composite braking system. The device comprises a test valve block and a pressure source, the test valve block is used for mounting a test electromagnetic valve; the test valve block is provided with a low-pressure oil port and a high-pressure oil port; the pressure source is communicated with the high-pressure oil port to provide high-pressure oil for the test valve block; the low-pressure oil port of the test valve block is communicated with a load component, the low-pressure oilport and the high-pressure oil port are respectively connected with a pressure sensor, the low-pressure oil port is further connected with a flow meter, and the flow meter and the pressure sensors arerespectively and electrically connected with an oscilloscope. The flow and pressure difference relation curve generated by the flow of the low-pressure port of the electromagnetic valve along with the pressure change of the high-pressure port can be quickly obtained, and the influence of the difference of the mesh number of the filter screen on the flow and pressure difference curve of the electromagnetic valve can be tested when the same electromagnetic valve structure is adopted.

Description

technical field [0001] The invention relates to the field of auto parts detection, in particular to a pressure difference flow test device for an electromagnetic valve of an automobile composite brake system. Background technique [0002] The solenoid valve is the core component of the actuator of the automobile braking system. Its main function is to control the flow of the braking system to form the pressure of the wheel cylinder. By accurately adjusting the opening and closing time of the solenoid valve, the pressure in the actuator can be established and Release to take control. Solenoid valves in braking systems are generally divided into two categories: normally open solenoid valves and normally closed solenoid valves. In order to accurately control the flow and pressure of the internal pipeline of the brake system, it is necessary to test the flow of the solenoid valve. [0003] The flow characteristics of the solenoid valve mainly depend on the structural character...

AI Technical Summary

Problems solved by technology

[0003] The flow characteristics of the solenoid valve mainly depend on the structural characteristics of the solenoid valve itself and the pressure difference environment in which it is located. If the flow rate of the solenoid valve is too small, it may cause its braking response time to be too slow, which does not meet the requirements of fast response of braking products.

Therefore, the solenoid valve in the automobile brake actuator needs to be tested to obtain the relationship curve between flow and pressure difference to determine whether it meets the design requirements. The current solenoid valve test device has a complicated structure and cannot quickly obtain the relationship between flow and pressure difference. And it is impossible to test the influence of the filter on the solenoid valve on the pressure difference

Images