| 摘要 |
PURPOSE:To increase the efficiency of an engine, by minimizing fluctuation of the engine speed at the time when the load is changed by delaying the actual ON-OFF switching of the load when the setting condition of load is varied and determining the timing of this ON-OFF switching of load on the basis of the engine speed. CONSTITUTION:In case that the setting condition of load 110 is changed from ON to OFF, the opening (d) of a throttle valve is increased by way of the predictive control. Here, since the load torque is not applied to an engine until the engine speed (a) is increased, drop of the engine speed is not caused. Further, since the valve opening (d) is increased to a desired opening at the time instant t2 when the torque is applied to the engine and the load is applied at the engine speed near a desired engine speed, fluctuation of the engine speed is not caused. In case that the load is changed from ON to OFF, on the other hand, rising of the engine speed is not caused since the load 110 is not turned OFF until the engine speed (a) is reduced near to a desired engine speed (b) by effecting correction of the load. Further, since the valve opening (d) is decreased to the opening corresponding to the desired engine speed (b) at the time when the load 110 is turned OFF and the load is actually turned OFF at an engine speed near the desired engine speed, fluctuation of the engine speed (a) is not caused at the time when the load is turned OFF. |
