Patent ID: 7204232
Filing Date: 2007-04-17
Classification: F02D,F02M,F02N

Abstract:
1. An electrically-operated automatic choke system of a carburetor, the system comprising: an electric motor; a transmission device which transmits a drive torque of the electric motor to a choke valve of the carburetor to open and close the choke valve; an electronic control unit for controlling operation of the electric motor; a choke valve closure spring which is connected to the choke valve and urges the choke valve in a closing direction; a temperature sensitive actuating device mounted on either one of the carburetor or a fixed structure connected to the carburetor, and comprising a piston member that protrudes therefrom upon expansion of a wax therewithin, the temperature sensitive actuating device receives heat generated by an engine; and a pivoting member which is coupled to the choke valve wherein the piston member faces the pivoting member and either contacts or moves away from the pivoting member on a pivoting path to a closed side of the choke valve, wherein closure of the choke valve by the choke valve closure spring is restricted according to an amount the piston member protrudes when the engine has stopped running.