| 摘要 |
PURPOSE:To control output torque of an engine accurately in a simple constitution, by a method wherein monitor loop circuit is provided for value of variation amount of load torque with respect to engine rotation speed. CONSTITUTION:Rotation speed N of an engine ENG is detected by an engine rotation speed detector TG, and signal dN/dt is supplied to an arithmetic circuit OP through a frequency/voltage converter FV and a differentiation circuit DCa. Torque variation amount dT/dt is also entered from a load detector LC through a differentiation circuit DCb into the arithmetic circuit OP, and signal -dN/dt is operated and supplied to an adder. Deviatin DELTAN between load torque Tf from the load detector LC and command torque from a torque setting device TE is added to output sigal from the arithmetic circuit OP. The resulting signal is entered through a pulse width control circuit PWM into a driving circuit DRV, and output control signal S thereof controls output of the engine ENG through a hydraulic power meter HD. Thereby output torque of the engine is controlled readily in a simple constitution. |
