| 摘要 |
PURPOSE:To prevent overrun of an engine, by providing a trouble detecting means which detects a trouble on the system of a spill valve by means of signals from a detecting means for a signal for the number of revolutions of an engine and an electromagnetic valve driving signal detecting means. CONSTITUTION:The fuel injection pump of a Diesel engine is controlled by an electromagnetic spill valve to control injection of fuel. A driving signal detecting circuit detects function of an electromagnetic valve. By means of signals from the driving signal detecting circuit and a detecting circuit for a signal for the number of revolutions, a trouble detecting circuit detects the presence of a trouble. Based on a signal from the trouble detecting circuit, a fuel cut valve is driven to shut off the fuel when a trouble occurs. This enables prevention of overrun of an engine even during failure in operation of the spill electromagnetic valve. |
