Test system and test method for testing reliability of electronic parking mechanism

Abstract

A test system and a test method for reliability test of an electronic parking mechanism are characterized in that a loading motor is controlled through a frequency converter, and the loading motor outputs torque to drive a gear box to rotate at a low speed; after an electronic parking mechanism of the gear box receives a parking instruction, the electronic parking mechanism is driven to complete parking, after specified torque needed by parking is completed, a brake disc simulates braking of an automobile to conduct braking action, and a braking signal and torque are sent to an NI real-time measurement controller through a torque sensor; the NI real-time measurement controller sends a parking release instruction to the electronic parking mechanism, then the electronic parking mechanism releases parking, after parking release is completed, the brake disc releases braking, and one cycle of the reliability test of the electronic parking mechanism is completed; the system is simple in structure, small in torque value, simple and accurate in torque control, short in single test time and safe in whole test; the brake disc is adopted to simulate a real brake working condition, and test data is more accurate and reasonable.

Description

technical field [0001] The invention relates to the field of detection and test methods, in particular to a test system and a supporting test method for the reliability test of an electronic parking mechanism applied in the field of research and development of automobile power devices. Background technique [0002] Electronic Parking EPB (Electrical Parking Brake) refers to the technology that realizes parking brake by electronic control. The supporting electronic parking mechanism is the product of modern automobile mechanical structure electronization. The working principle of the electronic parking mechanism can be divided into two parts: the electric drive unit and the mechanical actuator. Gears, reduction mechanisms (such as worm gear reduction mechanisms) and related connectors, while mechanical actuators mainly include parking gears, pawls, springs and other related components. [0003] The electronic parking mechanism in the prior art has disadvantages such as compl...

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Problems solved by technology

[0005] In order to solve the problem of the lack of test methods for the reliability test of the electronic parking mechanism in the prior art, the present invention provides a test system and test method for the reliability test of the electronic parking mechanism. The device has a simple structure and is convenient for testing , Its supporting test method can truly simulate the working conditions of the car to realize the reliability test of the electronic parking mechanism

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