초록 ▼

A fuel shutoff system that is usable on engines without a battery, and is inexpensive to manufacture. The fuel shutoff system operates without interfering with the engine governor, and effectively blocks the fuel flow downstream of the fuel bowl upon engine shutdown. One aspect of the invention is a

A fuel shutoff system that is usable on engines without a battery, and is inexpensive to manufacture. The fuel shutoff system operates without interfering with the engine governor, and effectively blocks the fuel flow downstream of the fuel bowl upon engine shutdown. One aspect of the invention is a fuel shutoff system for an internal combustion engine, wherein the engine has a carburetor with a fuel bowl and a fuel nozzle, an intake valve, and a fuel conduit between the fuel bowl and the intake valve. The invention includes a blocking member for selectively blocking the fuel conduit downstream of the fuel bowl to substantially prevent passage of fuel to the intake valve, and a manually-operable control for actuating the blocking member. In each embodiment, the engine includes a gas passageway through which a gas may pass to an intake valve of the engine, and the engine has a throttle valve disposed in the passageway, and the blocking member is distinct from the throttle valve. One embodiment of the invention includes a mechanically operated blocking member for selectively blocking fuel from flowing into the fuel nozzle. Another embodiment of the invention includes a blocking member disposed in the gas passageway. Another aspect of the invention is an ignition grounding system of the engine wherein the fuel shutoff system and the grounding system are both actuated by operation of the same mechanical means.

대표청구항 ▼

[ I claim:] [1.]1. A fuel shutoff system for an internal combustion engine, the engine having a carburetor with a fuel bowl and a fuel nozzle, a throttle valve, a fuel metering device for calibrating an air/fuel mixture, a fuel conduit communicating with the fuel bowl, and a fuel inlet pathway commu

[ I claim:] [1.]1. A fuel shutoff system for an internal combustion engine, the engine having a carburetor with a fuel bowl and a fuel nozzle, a throttle valve, a fuel metering device for calibrating an air/fuel mixture, a fuel conduit communicating with the fuel bowl, and a fuel inlet pathway communicating with the fuel nozzle and having one end defined by at least one fuel inlet and another end defined by an inlet end of the fuel nozzle, the shutoff system comprising:a blocking member distinct from the throttle valve and the fuel metering device, said blocking member being adjacent the fuel inlet pathway and being manually operable to selectively block entry of fuel into the inlet end of the fuel nozzle to substantially prevent passage of fuel through the fuel conduit; anda manually operable control that moves said blocking member to block entry of fuel into the inlet end of the fuel nozzle.