Noise Reduction of Two-Speed Automatic Transmission for Pure Electric Vehicles

At present, the noise of pure electric vehicles is a research hotspot, especially automatic transmission. In order to reduce problem in test, this paper proposes method optimize local structure gearbox housing. First, evaluated and analyzed by combining subjective objective methods, score information are obtained. Then factors that have great influence on transmission error explored, housing finally determined as optimization objective. Through finite element analysis, weak position can be located quickly accurately, then static dynamic stiffness improved adding changing stiffeners. The simulation results show performance optimized significantly improved. After test whole vehicle, two-speed reduced, evaluation good.