Engine speed governor.

摘要

A governor for a carburettor (10) having a throttle valve (16) to control the speed of an engine, in which the governor comprises a pneumatic device (21) connected to the throttle valve and having a working chamber (22) vented by an orifice (26), a closure valve (27) for the orifice, and electrical means (Fig. 4 or Fig. 5) responding to engine speed and to a predetermined desired speed of the engine controlling operation of the closure valve to effect through said pneumatic device changes in engine speed to correspond it to the predetermined desired speed.