Two kinds of valves in the regenerative braking pressure regulating module of an electric bus are taken as the research object. For the solenoid valve,the coupling dynamic model is established and the characteristics of the valve at different control frequencies and duty ratios are researched. In order to achieve precise pressure adjustment,the logic threshold control algorithm is proposed,and the effectiveness of the algorithm is verified. But the solenoid valve is controlled discontinuously with long resp...
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