关键词: 增程式电动汽车；燃油经济性；振动噪声；匹配策略

Abstract: Compared with traditional fuel vehicle and pure electric vehicle, the noise, vibration, harshness (NVH) problem of range extender electric vehicle is more complicated because of the influence of range extender control strategy. The unreasonable matching control logic is easy to cause problems such as high acceleration noise, roar, etc., and the later change cost is large and the cycle is long. In this paper, the theoretical model of the range extender system is simplified and the range extender system is regarded as an integral excitation source. By monitoring the state of the whole vehicle, the performance of the vibration and noise of the key points in the vehicle under different effective torque and crankshaft speed output by the range extender system, and avoiding the poor performance of the NVH strategy points, in the early stage of the project, the matching optimization of the vibration and noise of the key points in the vehicle can be realized, save cost and shorten project development cycle.

Key words: Extended-range electric vehicles; Fuel economy; Vibration noise; Matching strategy