Patent ID: 7331326

Claim:
A carburetor automatic control system for an engine, comprising: a choke valve disposed in an intake passage of a carburetor; a throttle valve disposed in said intake passage at a position downstream from said choke valve; a temperature-sensitive operating device operatively connected with said choke valve for operating said choke valve, wherein said choke valve is opened in correspondence with an increase in engine temperature; a governor operatively connected with said throttle valve for opening and closing said throttle valve to maintain a present rotational speed of the engine, wherein said governor includes, (a) an electric actuator opening and closing said throttle valve over a range from an idling open degree to a fully open degree, and (b) an electronic control unit for controlling said electric actuator to open and close said throttle valve, such that the rotational speed of the engine is maintained at the preset rotational speed; and a relief mechanism interposed between said choke valve and said temperature-sensitive operating device, said relief mechanism opening said choke valve in response to an intake vacuum pressure within the intake passage of the engine, when the engine is in a cold state, and said choke valve is in a closed state.