SAFETY SYSTEM FOR ENGINE SHUTDOWN, AND ENGINES AND EQUIPMENT INCORPORATING THE SAME

摘要

A safety system for engine powered machinery having a fuel cut functionality to promote more rapid shutdown of the rotating parts of the engine powered machinery. In one aspect, the system is implemented as a wiring harness disposed exclusively on the engine which simultaneously disables one or more ignition coils and prevents a fuel-air mixer from supplying a mixture of air and fuel to the engine upon activation of a safety switch. In alternate aspects, the system further comprises a stator brake which is activated by the safety switch to provide additional braking torque on the engine. These features bring the machinery to a rapid halt, further enhancing safety.

主权项

1. An engine powered machine with safety system comprising:
an engine configured to rotate a shaft coupled to a working tool; a fuel-air mixer fluidly coupled to the engine to provide a mixture of fuel and air; an ignition coil operatively connected to the engine to provide a plurality of sparks; a fuel supply fluidly coupled to the fuel-air mixer; a fuel solenoid operatively connected between the fuel supply and the fuel-air mixer, the fuel solenoid controlling a flow of fuel to the engine and movable between an open position in which fuel flows from the fuel supply through the fuel solenoid to the fuel-air mixer while the engine is in a running state, and a closed position in which the solenoid interrupts fuel flow to the fuel-air mixer while the engine is in an off state; and a safety switch operatively connected to the fuel solenoid and the ignition coil; wherein, upon activation of the safety switch, the ignition coil is disabled so that it no longer provides the plurality of sparks to the engine and the fuel solenoid moves to the closed position to interrupt the flow of fuel from the fuel supply to the fuel-air mixer.