关键词: 混合动力车辆；变速箱；油温预估模型；实测对比

Abstract: The performance of the transmission has an inevitable relationship with the oil temperature of the transmission. For some hybrid vehicles at present, there is only one gear of the transmission, and there is no shifting condition and no clutch. Therefore, the heat generated by sliding friction during gear shifting does not exist in this hybrid vehicle. For this hybrid structure vehicle, in order to reduce the manufacturing cost of the whole vehicle, a control model for predicting the transmission oil temperature is developed, which covers many aspects of the heat generation and heat dissipation of the transmission oil. Then, through the data calibration and matching of the real vehicle, the road test compares the predicted temperature and the actual data of the oil temperature sensor. The temperature difference between the two can be controlled within 10 ℃, which has achieved good test results and meets the development requirements.

Key words: Hybrid power vehicle; Gearbox; Oil temperature prediction model; Actual test comparison