| 摘要 |
A gaseous fuel injection system for use with a combustion engine having a throttle cable. The system include a supply tank connected to a pressure regulator connected to a throttle assembly, and a safety valve preventing fuel flow when the engine is not operating. The throttle assembly includes a tubular throttle body having opposing open ends, with one end securable to an intake manifold of the engine. A control rod extends transversely through the throttle body, and an air intake valve is secured to the control rod within the throttle body, so that rotating the control rod controls air intake into the intake manifold. A fuel valve is attached to the throttle body and includes a valve body defining a fuel outlet connected to a fuel injector extending into the throttle body. The fuel valve also includes a needle closing the fuel outlet and extending out of the valve body. A control arm has a first end pivotally secured to the throttle body and a second end secured to the needle, and a cam is secured to a second end of the control rod extending out of the throttle body and is in contact with the control arm. Rotating the control rod, therefore, pulls the needle out of the fuel outlet and controls fuel flow into the intake manifold. A throttle wheel is secured to a first end of the control rod and is adapted to receive the throttle cable, whereby the throttle cable controls both air intake and fuel flow.
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