5000,S Turbo Diesel L5-1986cc 20L MFI Pump | Engine Speed Control | Construction
Diesel MFI Pump: Description and Operation
Governor Functions
Idle-speed regulation -- Ensures that engine speed does not fall below the controlled idle speed.
Maximum no-load speed -- When load is removed, maximum full-load speed may not increase to more than the high idle-speed limit. The governor
provides for this by moving the control spool in the "stop" direction; the engine thus receives less fuel.
Intermediate speed control -- There is also intermediate speed control; engine speeds between idle and maximum can thus be controlled within certain
limits.
In addition to these, the governor has other control functions:
Releasing or blocking the extra quantity necessary for starting.
Altering full-load fuel delivery according to engine speed (torque control).
Various add-on modules are required for these functions.