A bench test device for simulating plateau braking of automobiles and its application method

Abstract

The invention discloses a bench test device for simulating the plateau braking of automobiles, which includes a simulated air chamber, a vacuum pump I, a vacuum pump II and an automobile vacuum system for providing power for the automobile braking system. The vacuum pump I communicates with the simulated The air chamber is connected, the automobile vacuum system is placed in the simulated air chamber, and the vacuum pump II is connected with the automobile vacuum system through the vacuum pipeline II. The automotive vacuum system includes a vacuum tank, booster and air pressure sensor Ⅰ. The vacuum pump Ⅱ communicates with the vacuum tank through the vacuum pipeline Ⅱ. The vacuum tank communicates with the booster through the vacuum pipeline Ⅲ. The air pressure sensor Ⅰ communicates with the vacuum tank through the pipeline to detect the automotive vacuum system. pressure. The bench test device of the present invention is not restricted by region, and can test and test the relationship between the vehicle vacuum system and the pedal stroke, pedal force, hydraulic pressure and vacuum degree of the brake pedal at the same place at different altitudes, realizing fast, simple, Effective verification reduces the development cycle and cost of models.

Description

technical field [0001] The invention belongs to the technical field of automobile brake system testing, and in particular relates to a bench test device for simulating automobile plateau braking and a use method thereof. Background technique [0002] With the rapid development of pure electric vehicles, electronic vacuum systems are more and more commonly used in vehicle braking systems, so it is required that the vacuum system can be applied to various complex environments, especially in plateau environments. Whether the vacuum pump and vacuum degree control strategy can meet the needs of the whole vehicle, most car companies will conduct real vehicle tests on plateaus to ensure that the developed models can be used in different plateau regions. [0003] In the pure electric vehicle braking system, the role of the vacuum subsystem is to provide assistance for braking. The vacuum system is generally composed of an electronic vacuum pump, a vacuum tank and a sensor (controlle...

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Problems solved by technology

[0003] In the pure electric vehicle braking system, the role of the vacuum subsystem is to provide assistance for braking. The vacuum system is generally composed of an electronic vacuum pump, a vacuum tank and a sensor (controller). The sensor (controller) monitors the environmental pressure and the vacuum system. Pressure, convert the pressure value into a voltage signal, and drive the electronic vacuum pump to work or stop according to the control strategy of vacuum degree through the controller or the vehicle VCU. The atmospheric pressure at different altitudes is different, and the corresponding control strategies are different, especially in high altitude areas. Whether the vacuum system control strategy can meet the needs of the whole vehicle, whether the brake pedal force and travel at different altitudes meet the vehicle requirements, can not be confirmed in the early stage of the newly developed model, and can only be evaluated by experience and theoretical calculations. The new model will be trial-produced and loaded Finally, the whole vehicle is sent to the plateau area for testing. If the parts in the braking system are unqualified, it is necessary to return to remake the parts, reload the vehicle and send the whole vehicle to the plateau area for testing again, which will lengthen the life of the model. The development cycle restricts the development progress of new models and ultimately affects the launch and sales of new models

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