Vehicle brake test device and method for brake test using said device

Abstract

The invention provides a whole-vehicle braking test device which is applicable to the technical field of whole-vehicle tests, and further discloses a method for using the whole-vehicle braking test device to conduct a braking test. A vacuum pressure sensor (1) of the whole-vehicle braking test device is installed on a vacuum booster (4), and the vacuum pressure sensor (1), a braking pedal force meter (2) and a deceleration meter (3) are connected to a control main engine (5) which is capable of collecting data respectively. According to the whole-vehicle braking test device and the test method, the braking performance of a whole vehicle in a high-plateau high-rigidity region can be tested, the parameters of a braking system like the vacuum degree, the baking pedal force, and the braking deceleration are measured, the whole-vehicle performance is improved, the braking performance is improved, the braking fault occurs when the whole vehicle is in the high-plateau high-rigidity region is avoided, thus the braking performance is guaranteed, and the personal safety of a driver and a passenger is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of vehicle testing, and more specifically relates to a vehicle braking test device, and also relates to a method for performing a braking test using the vehicle braking test device. Background technique [0002] The performance of the vehicle braking system directly affects the driving safety. There are thousands of traffic accidents due to the failure of the braking system in the country every year. The failure of the braking system is mainly manifested in the failure of the brake. There are several main reasons for the failure of the brake: 1. The vehicle is overloaded; 2. The brake pipeline is aging; 3. Design problems. [0003] The main reason for the design problem of the braking system is that the change of the braking system when the vehicle is used in a complex environment (the vacuum degree of the vacuum booster decreases, the friction coefficient of the friction plate decreases at low temperature, ...

AI Technical Summary

Problems solved by technology

[0003] The main reason for the design problem of the braking system is that the change of the braking system when the vehicle is used in a complex environment (the vacuum degree of the vacuum booster decreases, the friction coefficient of the friction plate decreases at low temperature, etc.), which leads to the failure of the braking system

For example: in plateau areas, as the altitude rises, the atmospheric pressure decreases, and the pressure of the vacuum booster in the braking system decreases, which causes the braking system to decrease or even fail; in alpine areas (the ambient temperature is below -20°C), Because the ambient temperature is low, the viscosity of the engine oil increases, and the resistance of the whole vehicle increases, the engine needs to increase the speed to increase the torque. To increase the speed, the throttle opening must be increased, and the throttle opening increases, and the vacuum degree of the intake manifold decreases. The vacuum degree of the vacuum booster of the braking system will drop. In addition, at low temperature, the friction coefficient of the friction plate will decrease. Therefore, the performance of the braking system in the alpine region will decrease. For example, the impact of environmental factors is not considered in the design of the braking system. It is very easy to cause traffic accidents when the vehicle is driven in an alpine environment. Therefore, the impact of the special environment on the braking system should be fully considered in the design stage of the vehicle braking system.

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