| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the efficiency of an engine while holding a withstand voltage standard required for an electronic device lower by peforming feedback control of a fuel injection amount so that an engine rotating speed can approximate a target, engine rotating speed which is set to be lower as load is lower. SOLUTION: Specially, an engine rotating speed control means 84 performs feedback control of a fuel injection amount so that an engine rotating speed N can approximate an target engine rotating speed Nset. An upper limit value setting means 87 sets an upper limit value Nlimit corresponding to the detected engine rotating speed N as well as a DC voltage V and a DC current A. An engine rotating speed limiting means 88 limits a fuel injection amount so that the engine rotatirng speed N can not exceed the upper limit value Nlimit. In this way, a withstand voltage standard required for an electronic device is held lower to reduce the cost of a product and the change rate of the engine rotating speed is increased to improve the efficiency of an engine.</p> |
