| 摘要 |
PURPOSE:To provide a greater rotational driving force without the need of a particular electric motor by interposing a hydraulic motor on the way of the discharge passage for an engine lubricating oil pump and utilizing the hydraulic motor for the rotational driving of a cooling fan. CONSTITUTION:When an engine 10 is started, a lubricating oil pump 11 is caused to work, and accordingly, the lubricating oil within an oil pan 10a is discharged into a discharge passage 12. At the time of starting of the engine 10, since the engine 10 is in a state of low temperature, the signal level from a temperature senser 30 is low, and an electromagnetic switching valve 13 is switched to the location I with a controller 19 unoperated. Thereby, all of the lubricating oil is discharged through a sub-passage 15 into the lubricating section of the engine 10. While, when the engine 10 reaches the high temperature state, the electromagnetic switching valve 13 is switched to the location II. Thereby, the lubricating oil is fed through a main passage 14, a hydraulic motor 16 and a check valve 31 into the lubricating section, thus a cooling fan 18 being caused to rotate such that the engine 10 is cooled. |
