| 摘要 |
A cooling system (40) includes a first cooling system (41) in which coolant is supplied from a radiator (43) to a motor (31, 32) so as to cool the motor (31, 32), and then the coolant is supplied to banks (X, Y) of an engine (22) through a circulation passage (45) and split flow passages (46a, 46b) so as to cool the engine (22); and a second cooling system (51) in which the coolant delivered from the radiator (43) through a branch passage (52) is further cooled by a radiator (53), and the cooled coolant is supplied to a drive circuit (35) so as to cool the drive circuit (35). With this configuration, it is possible to efficiently cool the motor (31, 32), the engine (22), and the drive circuit (35) whose suitable operating temperatures are different from each other, and to make the configuration of the cooling system simple. |
