| 摘要 |
PURPOSE:To accurately control the amount of oil supply and improve the mounting freedom of an oil pump, etc., by making the oil pump for supplying oil to an engine a motor driving type and controlling the number of revolutions of the motor according to the opening of a throttle valve. CONSTITUTION:A comparing circuit 3 is provided for comparing an output signal of a throttle valve opening detecting circuit 1 comprising a potentiometer 11 interlocking with a throttle valve and an idle correcting circuit 12, etc., and an output signal of a number-of revolution of motor detecting circuit 2 comprising a number-of-revolution sensor 21 for detecting the number of revolutions of a motor M for driving an oil pump 5, a waveform shaping circuit 22, a differential circuit 23, and a level setting circuit 24. And, difference between the outputs from both circuits 1, 2 are calculated, and voltage proportional to the difference is outputted to a motor driving circuit 4 and an abnormal condition detecting circuit 6. The abnormal condition detecting circuit 6 detects a fact that the comparing circuit 3 successively issues an H signal, and thus detects an overload state of the pump 5, allowing a display means 7 to be driven by said output signal. |
