Briggs & Stratton engines use three basic types of speed control. These are:
Mechanical governor: A mechanical governor regulates engine speed by controlling fuel flow or the throttle opening. It typically consists of a set of flyweights or springs that respond to changes in engine speed and adjust the throttle position accordingly. The mechanical governor automatically adjusts the throttle to maintain engine speed under varying load conditions.
Pneumatic Governor: Some Briggs & Stratton engines utilize a pneumatic governor, which operates based on air pressure changes. The pneumatic governor uses a diaphragm or vane mechanism to sense engine speed and adjust the throttle position accordingly. It responds to variations in air pressure within the engine to maintain a stable speed under different load conditions.
Electronic Speed Control: Many modern Briggs & Stratton engines incorporate an electronic speed control system. This system uses digital sensors, a control module, and an electrically actuated throttle to regulate engine speed. The electronic speed control system monitors various engine parameters, such as RPM, load, and temperature. It adjusts the throttle electronically to maintain a desired speed and optimize performance.
These three types of speed controls enable Briggs & Stratton engines to maintain consistent and efficient operation. This is whether in small power equipment like lawnmowers, generators, or other applications. The specific type of speed control used may vary depending on the engine model, application, and the engine's sophistication.