AUTOMATIC CHOKING MECHANISM FOR INTERNAL COMBUSTION ENGINES

摘要

An air/fuel mixing apparatus configured for use with an internal combustion engine including a carburetor including a body defining a passageway therethrough and a choke valve positioned in the passageway, a solenoid, and a thermal switch configured to energize or de-energize the solenoid. The solenoid is configured to move the choke valve between the choke open position and the choke closed position, wherein the solenoid includes a rotary shaft coupled to a choke lever, and a thermostatic element coupled to the rotary shaft. The thermostatic element expands and constricts based on a temperature of the engine and restricts the movement of the choke valve between the choke closed position and a partially-open position when the solenoid is not energized.

主权项

1. An air/fuel mixing apparatus configured for use with an internal combustion engine comprising:
a carburetor comprising:
a body defining a passageway therethrough; anda choke valve positioned in the passageway, wherein the choke valve is rotatable about a first vertical axis in response to movement of a choke lever, and wherein the choke valve is rotatable between a choke open position and a choke closed position; a solenoid configured to move the choke valve between the choke open position and the choke closed position, wherein the solenoid comprises:
a rotary shaft coupled to the choke lever;a thermostatic element coupled to the rotary shaft, wherein the thermostatic element expands and constricts based on a temperature of the engine, wherein the thermostatic element restricts the movement of the choke valve between the choke closed position and a partially-open position when the solenoid is not energized; and a thermal switch coupled to the solenoid configured to open below a predetermined temperature and close above the predetermined temperature, wherein the thermal switch is configured to de-energize the solenoid when open and energize the solenoid when closed thereby moving the choke valve to the choke open position.