Automatic choke control

Claim 1

Automatic choke apparatus for a carburetor of the type having a choke valve having a control linkage mechanism and a throttle valve having a control linkage mechanism in an intake passage, said apparatus comprising choke control means for controlling the movement of a choke valve, said choke control means including first temperature responsive control means for applying moving forces on said choke valve with choke valve opening moving forces decreasing with increasing temperature, second pressure responsive control means for moving said choke valve from a closed position to a first open position, and third control means connected to said first means for neutralizing changes in reactive forces on said first means resulting from movement of said choke valve to said first open position by said second means such that movement of said choke valve in respective opposite directions with respect to the first open position is controlled by said first means independent of reactive forces obtained by the action of said second means, said third means being connected to said first means independently and separately from the throttle valve control linkage mechanism so that neutralization of the changes in reactive forces on said first means is effected by said third means irregardless of the position and movement of the throttle valve.