| 摘要 |
There is disclosed an automatic control system for limiting the operating temperature of a diesel engine (10) having a shutdown lever (52) that repositions the rack of its fuel pump (12) to a shut down position that closes the pump metering valves and shuts off the fuel supply to the engine. The system includes a pyrometer (24) to sense the exhaust gas temperature from the engine and generate a signal therefrom, a temperature controller (30) having an adjustable, maximum set point temperature to receive the signal from the pyrometer (24) and to generate a control signal which is applied to a control valve (102) in a fluid pressure line (99) which applies a fluid pressure to a pressure responsive actuator (82) that moves the shut down lever (52) a fraction of its full travel necessary for shut down and thereby repositions the fuel pump rack to a throttling position in response to a sensed exhaust gas temperature which exceeds the preselected maximum set point temperature. |
