| 摘要 |
PROBLEM TO BE SOLVED: To restrict deterioration of an electric oil pump to be used as an auxiliary one to a main oil pump for elongating its service life, and avoiding increase of its size. SOLUTION: The electric oil pump 40 is actuated for a specified allowable actuation time, and an engine 12 is then started to feed hydraulic pressure by the mechanical oil pump 36. Continuous actuation time of the electric oil pump 40 is thus limited, and deterioration of the electric oil pump 40 is restricted to elongate its service life, while avoiding enlargement of its size. |
