| 摘要 |
PROBLEM TO BE SOLVED: To efficiently increase the temperature of lubrication oil of a transmission (ATF) in a hybrid vehicle that performs heat exchange between ATF and a motor generator (MG).SOLUTION: A target input rotation speed of a transmission 13 is set so that an ATF heat loss ratio of an MG 12 (the ratio of heat loss that contributes to the ATF temperature increase in the MG 12) is maximum based on required driving force of a vehicle at the time of warm-up request of the transmission 13 (at the time of ATF temperature increase request). Thereby, while the required driving force of the vehicle is satisfied, the target input rotation speed at which the ATF heat loss ratio is maximum is set. By controlling torque of the MG 12, torque of an engine 11, and a transmission ratio of the transmission 13 so as to achieve the target input rotation speed, the MG 12, the engine 11, and the transmission 13 are controlled in a condition that the ATF heat loss ratio is maximum. |
