The Design And Experimental Research Of Evb Key Components In The Automobile

Existing electronic assist braking systems for vehicle longitudinal driver assistance systems are of complex structure, high cost, and occupy a large volume of space when installed. In order to overcome the aforementioned disadvantages, an electronic vacuum booster system (EVB) has been developed based on a normal vacuum booster. In addition, an optimized design of the key parts has been developed, as well as a system reliability test method. The main research contents are as follows:1) The mechanical design of EVB systemsThe structure of an EVB system is designed based on the normal vacuum booster's working principles. In the new structure, an electromagnet and a release switch are added and integrated into the vacuum booster. The new system design is simple, without occupying additional space in the engine compartment.2) Key component design for EVB systemsThe electromagnet is one of the key components for an EVB system; its mechanical properties are directly related to system performance. In this paper, a model of the electromagnet is established in Matlab/Simulink software, and the related parameters of electromagnet are designed based on this model. In addition, the release switch is another key component of EVB that serves to sense the driver's brake operation. The structure of the release switch is designed so that it will be easy to install and quick to sense movement of the brake pedal.3) Product testing of the EVB systemBased on the design of the EVB structure and optimization of key components, the EVB systems were tested on a comprehensive performance testbed according to the standards of electromechanical automotive products. The performance of a number of EVB system prototypes was verified through a series of experiments.