Toyota Jidosha Kabushiki Kaisha

Daisuke Shirai

Tomohito Ono

Hiroto Hashimoto

Terufumi Miyazaki

Yosuke Suzuki

Hiroki Iguma

A 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.

Powertrain system

If the destination has not been input, it is judged whether the present location is on the expressway (step S). If the judgement result of the step Sis positive, it is judged whether or not the actual SOC is less than or equal to the threshold TH(step S). If the judgement result of the step Sis positive, the restoring control is executed (step S). Subsequent to the step Sor S, it is judged whether or not the vehicle is still on the expressway (step S). If the judgement result of the step Sis positive, it is judged whether or not the actual SOC is greater than or equal to the SOC_T(step S). If the judgement result of the step Sis positive, the maintaining control is executed (step S).

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Sutno-gun, Japan

Daisuke Shirai