| 摘要 |
PURPOSE:To make constant the crank shaft rotating angle at which fuel is injected in all speed ranges of an engine by setting the number of reversals of a reciprocative valve body prior to the fuel injecting timing larger in the low speed revolving range and smaller in the high speed revolving range. CONSTITUTION:Fuel from a fuel pump 4 is supplied to a fuel injection valve 1 via a throttle 61. Prior to the fuel injecting timing, a valve body 35 is reciprocated in a short time so that the injection valve body 13 does not move. Therein a control device 62 controls current supply to a solenoid 32, and the number of reversals of the valve body 35 shall be made larger in the low speed revolving range and smaller in the high speed revolving range. This drops the fuel pressure gradually at every reciprocative motion, so that the fuel injection pressure can be controlled so as to be lower in the low speed revolving range and higher with increasing revolving speed. This enables injection of a specified amount in a short time in the high speed revolving range and in a long time in the low speed revolving range, which can make constant the crank shaft rotating angle at which the fuel is injected in all speed ranges. |
