| 摘要 |
PURPOSE:To prevent rough idling operation of an engine, by increasing the fuel supply rate when the engine speed becomes lower than a tolerable value, and thereby raising the engine speed promptly even in case that variation of the combustion pressure is increased abruptly at the time of idling operation of the engine. CONSTITUTION:A pulse generator 2 connected to a crankshaft of an engine 1 generates pulse signals at equal intervals of the stroke volume and the crank angle, and a detector 3 gives an output signal to an amplifier 4 through detection of the above pulse signals. Further, pressure sensors 5, provided one for each cylinder of the engine, detect pressure in respective combustion chambers and furnish the pressure signals to the amplifier 4, which in turn gives output signals to an arithmetic means 6 by amplifying and scaling the above pressure signals. The arithmetic means 6 calculates the mean effective pressure, the variation value of the mean effective pressure and the engine speed of each cylinder at each cycle of the engine, and a control means 7 gives control signals to fuel injection valves 8 provided one for each cylinder. Thus, aimed objects and required effects of this invention can be achieved. |
