Method for testing ESP (electronic stability program) /ABS (anti-lock brake system) pumps

Abstract

The invention relates to testing devices in the field of automobiles and provides a novel device and method for testing ESP (electronic stability program) / ABS (anti-lock brake system) pumps. The device comprises a tested pump unit which is connected with an oil pump oil inlet portion, an adjustable oil outlet pressure portion, a flow measurement portion and an industrial personnel computer portion. The device can be used for testing the flow Q1 and volumetric efficiency u of ABS oil pumps and ESP oil pumps under different inlet pressures, different power voltages and different outlet pressures. Using the device for testing units of each oil pump does not need to use an assembly as a testing part, so that failure of the ABS pumps and energy storage parts can be predicated in advance, failure risks are lowered, complexity of hardware and software is lowered, and cost is further reduced. In addition, by means of the novel device and method for testing ESP / ABS pumps, testing period is shortened, testing difficulty is lowered, acquired data is more reliable, and testing accuracy is higher.

Description

technical field [0001] The invention relates to a test method in the field of automobiles, in particular to a test method for an ESP / ABS pump. Background technique [0002] ABS (Anti-locked Braking System) is a car safety control system with the advantages of anti-skid and anti-lock; ESP (Electronic Stability Program) is a part of the vehicle's active safety system Anti-slip software. Automobile anti-lock braking system / automobile electronic stability program (ESP / ABS) has the advantages of increasing automobile braking stability, shortening braking distance, improving tire wear status, etc., which greatly improves the safety of automobile braking. Among them, the pump is the key component of the system, and it is the executive structure to realize the adjustment of the wheel brake pressure; through the action of the pump, the wheel brake pressure can be reduced to prevent the wheel from locking. In the failure mode of the ESP / ABS system, the probability of failure of the ...

AI Technical Summary

Problems solved by technology

[0004] 1. These test benches are expensive, costly to use and maintain, and difficult to meet the requirements of testing a single oil pump unit

For example, in the durability test of an oil pump, it is necessary to perform hundreds of thousands of tests under different inlet pressures and different outlet pressures of the oil pump. In this case, it is easy to damage the test bench

[0005] 2. The tested part needs to use the ESP / ABS assembly, and the pump can only be tested after the development of the ESP / ABS assembly is completed, wasting valuable development time

[0006] 3. The software and hardware required by the test bench are complex and costly, and the development of the bench is difficult

[0007] 4. Many of the test data of the pump are obtained through indirect tests, affected by intermediate process variables, data conversion of the acquisition device, etc., the accuracy of the test results is not high

[0008] 5. The test process takes too much time and the operation is complicated, which increases the difficulty of the test

[0009] 6. In testing the efficiency of the pump, the oil inlet pressure needs to be continuously adjustable in the range of -1.0 to 6.0 Bar, and the general ESP / ABS assembly test bench needs to pump the brake fluid from the accumulator, but the ABS The oil inlet pressure of the oil pump cannot meet the range of -1.0~6.0Bar and can be continuously adjusted

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