Control techniques for an electrically all-wheel drive (eAWD) hybrid vehicle involve determining whether to transition from an electric-only mode to a parallel mode based on a driver torque request ora state of charge (SOC) of a battery system. During the electric-only mode, the electric motor is operated such that a torque reserve is maintained. When the driver torque request exceeds a maximum drive torque that the electric motor is capable of generating, the electric-only to parallel mode transition is performed. This involves the electric motor depleting the torque reserve to provide an expected acceleration feel for the driver while engine and transmission speeds are synchronized. When the SOC of the battery system falls below an SOC threshold, the drive torque of the electric motor is decreased to zero upon engine/transmission speed synchronization such that the battery system can be recharged.
本申请涉及一种用于电动全轮驱动(eAWD)混合动力车辆的控制技术,这种控制技术涉及根据驾驶员转矩请求或电池系统的充电状态(SOC),确定是否从纯电动模式转换为并行模式。在纯电动模式期间,电动机进行工作以保持转矩储备。当驾驶员转矩请求超过电动机能够产生的最大驱动转矩时,执行从纯电动模式到并行模式的转换。这种转换涉及电动机消耗转矩储备,以在发动机的速度和变速器的速度同步时为驾驶者提供所期望的加速感觉。当电池系统的SOC下降到SOC阈值以下时,电动机的驱动转矩在发动机速度/变速器速度同步时降为零,从而可对电池系统进行充电。
MODE TRANSITION CONTROL TECHNIQUES FOR ELECTRICALLY ALL-WHEEL DRIVE HYBRID VEHICLE
电动全轮驱动混合动力车辆的模式转换控制技术
2021-03-16
Patent
Electronic Resource
Chinese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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