In a powertrain system in which a crankshaft of an internal combustion engine is connected to a rotating shaft of a motor generator via a torsion damper, the torque applied to the crankshaft during cranking can be effectively increased without increasing the MG torque itself. The powertrain system includes an internal combustion engine, a motor generator and a control device. The motor generator includes a rotating shaft connected to a crankshaft of the internal combustion engine via a torsional damper. The powertrain system is configured such that the crankshaft and the above-described rotating shaft are not connected to a drive shaft of a vehicle at least at the time of engine start. The control device is configured to execute a cranking torque amplification control that controls the motor generator such that the MG torque output from the motor generator for cranking the internal combustion engine fluctuates in a resonant period of the torsional damper while making a fluctuation center of the MG torque higher than zero.
在内燃机的曲轴经由扭转减振器与电动发电机的旋转轴连结的动力传动系统中,不提高MG转矩自身就能够有效地提高在起转时向曲轴赋予的转矩。动力传动系统具备内燃机、电动发电机以及控制装置。电动发电机具有经由扭转减振器与内燃机的曲轴连结的旋转轴。动力传动系统构成为,至少在发动机起动时曲轴及上述旋转轴不与车辆的驱动轴连结。控制装置执行如下的起转转矩放大控制,所述起转转矩放大控制是以使得为了使内燃机起转而从电动发电机输出的MG转矩的变动中心高于零、并且该MG转矩以扭转减振器的共振周期发生变动的方式,控制电动发电机的控制。
POWERTRAIN SYSTEM
动力传动系统
2021-08-06
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 |