Two types of governor what control speed?

The two types of governors that control speed are the centrifugal governor and the hydraulic governor. The centrifugal governor adjusts the fuel supply or throttle based on the rotational speed of the engine, using centrifugal force to regulate engine speed. The hydraulic governor, on the other hand, utilizes fluid pressure to control the engine speed, typically found in larger engines or industrial applications. Both types ensure that the engine operates within desired speed limits for efficiency and safety.