| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration of efficiency due to engine stop in parallel off and to lower a load of a starting device and the like for an engine. SOLUTION: When an abnormal condition in a system power source is detected, a system protection part 138 outputs an abnormal signal. In response to the abnormal signal, a parallel operation relay 135 is opened, and a timer 39 is started at the same time with parallel off of the parallel operation. By the parallel off, the engine 11 is operated without a load. If the abnormal condition is maintained beyond a set time of the timer 39, a timeout signal is outputted, and according to this signal, the engine 11 is stopped. If a cause of the abnormal condition is removed before the lapse of the set time of the timer 39 and the abnormal signal is canceled, the parallel operation relay 135 is closed and parallel off of the parallel operation is released, and the timer 39 is reset.</p> |
