Automatic choke valve apparatus in an internal combustion engine

摘要

An automatic choke valve apparatus in an internal combustion engine in which an operation shaft connected to a choke valve provided in an intake passage of an internal combustion engine and a driving shaft connected to a pulse motor are interconnected through an intermediate torsion spring and are engaged with one another through circumferentially disposed front and rear pawls for being feed-driven only in a regular direction of rotation of the driving shaft. By effecting reverse direction of rotation of the driving shaft and then regular direction of rotation of, the choke valve is first placed into a starting position setting and then into an open-degree position after engine firing is carried out by the pulse motor effecting rotation in the regular direction for a length of time and at a speed both depending on engine temperature.