| 摘要 |
<p>An engine control device for a construction machine has pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed correction value- calculating portion (90), and a correction value-adding portion (70r). A target revolution speed (NR2) for control is calculated such that an engine speed increases from a target revolution speed (NR1), from an input portion (71), based on a change in a state quantity and then gradually returns to the target revolution speed (NR1), a target fuel injection amount (FN1) is calculated based on a target revolution speed (NR2) for control, and a fuel injection amount is regulated. The structure above enables the reduction of an engine speed in rapid increase in an engine load to be reduced without sacrificing operation, and lowering of durability caused by overspeeding of the engine to be prevented.</p> |
