| 摘要 |
PURPOSE:To secure lubrication oil pressure at idling, by increasing a ratio of the rotational speed of an output member to the rotational speed of an input member in a speed change device when an engine operation under load is transferred to an idling operation. CONSTITUTION:A rotating power of a crank shaft 2 is transmitted through sprockets 4 and 8, a shaft 9 and a worm 10 to an input gear 22 to drive a lubrication oil pump device 20. A speed change device is incorporated in the lubrication oil pump device 20. when an internal-combustion engine is operated at idling for a predetermined time from a final moment where the engine has been operated under load higher than a predetermined value, a ratio of the rotational speed of an output member to the rotational speed of an input member in the speed change device is increased until the predetermined time from start of the idling operation is elapsed. Thusly, a minimum necessary oil pressure of lubrication oil at idling may be secured, thereby permitting the lubrication oil to be sufficiently supplied. |
