Automatic choke valve apparatus in an internal combustion engine

Details Automatic choke valve apparatus in an internal combustion engine Automatic choke valve apparatus in an internal combustion engine

1975-06-23

1977-02-01

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

261 39E, 261 64R, 261 39R, F02M 110, F02D 1108, F02M 2304

Patent

active

040056902

ABSTRACT:
An automatic choke valve apparatus for 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 connected together through an intermediate torsion spring and are engaged with one another through circumferentially disposed front and rear pawls for being feed-driven only in regular direction of rotation of the driving shaft. The choke valve is given a starting position setting in such manner that, by the operation of the pulse motor, the driving shaft undergoes excessive rotation beyond the fully closed position of the choke valve. A fast-idle cam cooperating with a throttle valve provided in the intake passage is angularly extended in one direction so as to form a low temperature cam portion comparatively large in cam height and the fast idle cam is connected to the driving shaft through a gang mechanism such as a link, so that in the course of excessive rotation of the driving shaft, the cam undergoes excessive rotation corresponding thereto and the low temperature cam portion is placed into operating position.

REFERENCES:
patent: 3401919 (1968-09-01), Seufert et al.
patent: 3534720 (1970-10-01), DuBois
patent: 3818881 (1974-06-01), Hosho et al.
patent: 3906911 (1975-09-01), Nakada et al.
patent: 3948240 (1976-04-01), Hirosawa et al.

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