WOODWARD 调速器 EPG ELEC. POWERED GOWVENOR说明书.pdfVIP

EPG Electrically Powered Governor Installation and Control Choices for EPG Actuators Application Note 50530 (Revision A) Application Note 50530 Installation Control Choices for EPG Actuators Installation and Control Choices for EPG Actuators General Connecting an EPG actuator to a diesel engine to provide precise control of speed or load usually presents three choices: • Removal of the existing governor and connecting the actuator directly to the injector rack or other fuel control • Leaving the existing governor in place and connecting to the shutdown lever or rod, setting the mechanical-governor speed at maximum • Connecting to the speed-setting lever on the mechanical governor Connecting directly to the rack or fuel-metering device is the most desirable, but in many cases the least practical choice, since the mechanical governor is often an integral part of the existing control system. The option of connecting directly to the rack or fuel-metering device should always be the first choice. Almost all units have a shutdown lever which shuts off fuel to the engine. The movement of the shutdown lever and the flow of fuel is usually proportional, allowing close control. If the shutdown lever is selected for EPG control it should be checked for smooth operation and to be sure that its movement provides a proportional curtailment of fuel. WARNING—OVERSPEED SHUTDOWN If the shutdown lever should be selected for the EPG fuel control mechanism, an alternate method of emergency shutdown should be provided. This alterna