3058555
Governor Barrel
Cummins®

The Governor Barrel is a crucial component of the fuel system in diesel engines. It is responsible for regulating the engine speed by controlling the amount of fuel that enters the engine. The Governor Barrel works by responding to changes in load on the engine and adjusting the flow of fuel accordingly. It consists of a cylindrical barrel with a series of ports and passages that control the flow of fuel to and from the injectors. As engine speed increases, centrifugal force causes weights attached to springs inside the Governor Barrel to move outward, which in turn restricts fuel flow and prevents overspeeding. Conversely, as engine speed decreases, spring tension pulls these weights inward, opening up more ports and increasing fuel flow until normal operating speed is achieved again. The Governor Barrel can be found on many diesel engines including trucks, buses, construction equipment, and marine vessels.