Patent ID: 6012420
Filing Date: 2000-01-11
Classification: F02D,F02M

Abstract:
An automatic choke apparatus that increases the startability of an internal combustion engine, comprising:a device that creates an air flow as a function of the speed of the engine;a vane that is movable in response to said air flow;a choke valve disposed in a carburetor throat;a linkage interconnected between said vane and said choke valve and responsive to the movement of said vane;an abutment surface;a thermally-responsive device that engages said abutment surface during engine starting when the temperature near said thermally-responsive device is above a predetermined level, to thereby retain said choke valve in a partially open position during engine starting when the temperature neat said thermally-responsive device is above said predetermined level, wherein said thermally-responsive device includes:an elongated housing interconnected with at least one of said engine and said vane, said housing having a chamber therein;an elongated thermally-responsive member having a length and having at least one of a high coefficient of thermal expansion and thermal contraction, that is at least partially disposed in said chamber and that at least one of expands and contracts along its length when the temperature near sad thermally-responsive member reaches said predetermined level; andwherein said abutment surface is interconnected with the other of said engine and said vane, said thermally-responsive member having an integrally-formed part that abuts said abutment surface when said thermally-responsive member has at least one of expanded and contracted.