DIESEL ENGINE SPEED,DOE-HDBK-1018/1-93Diesel Engine FundamentalsFUEL CONTROLS, AND PROTECTIONDetailedOperationof the GovernorWith the engine operating, oil from the engine lubrication system is supplied to thegovernor pump gears, as illustrated in Figure 29. The pump gears raise the oil pressureto a value determined by the spring relief valve. The oil pressure is maintained in theannular space between the undercut portion of the pilot valve plunger and the bore in thepilot valve bushing. For any given speed setting, the spring speeder exerts a force thatis opposed by the centrifugal force of the revolving flyweights. When the two forces areequal, the control land on the pilot valve plunger covers the lower ports in the pilot valvebushing.Figure 29 Cutaway of a Woodward Governor ME-01Rev. 0Page 36
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business