The invention relates to the field of electric vehicles, and discloses an oil-cooled electric drive assembly of an electric vehicle and an oil leakage detection strategy of the oil-cooled electric drive assembly. According to the detection strategy, whether the starting condition of oil leakage detection is met or not is firstly determined, if yes, an oil pump of the electric automobile is controlled to reach a preset rotating speed, if not, an end mark is judged, under the condition that the end mark is not received, first cumulative time is determined, and it is determined that oil leakage does not exist according to judgment of the first cumulative time and preset time. And other oil leakage conditions are judged according to other marks. According to the detection strategy, on the basis that an oil level sensor is not added, oil liquid in an oil cavity of the oil pump is diagnosed through the motor and the oil pump, oil leakage detection is started according to preset conditions, meanwhile, the oil pump carries out phase current detection, and whether the oil pump has an air suction fault or not is judged according to the magnitude of the phase current; the cost can be reduced, the oil leakage phenomenon can be detected and actively recognized in real time, and the running safety of the electric automobile is guaranteed.
本发明涉及电动汽车领域,公开了一种电动汽车的油冷电驱动总成及其漏油检测策略。该检测策略首先确定是否满足漏油检测的开启条件,满足的情况下控制电动汽车的油泵至预设转速,判断是否接收到结束标志,在未接收到结束标志的情况下,确定第一累计时间,并根据对第一累计时间与预设的时间判别确定未漏油,并根据其他的标志判断其他的漏油情况。该检测策略可以在不增加油位传感器的基础上,通过电机和油泵对油泵的油腔内油液进行诊断,根据预设的条件开启漏油检测,同时油泵进行相电流检测,根据相电流大小来判断油泵是否发生吸空故障,相较于增设防漏油管道,可以降低成本,能够实时检测,主动识别到漏油现象的发生,保障电动汽车运行的安全性。
Oil-cooled electric drive assembly of electric automobile and oil leakage detection strategy of oil-cooled electric drive assembly
电动汽车的油冷电驱动总成及其漏油检测策略
2025-01-07
Patent
Electronic Resource
Chinese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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