Importance

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Abstract

A pro-active engine control system for a rotary engine having a governor generating a fuel command signal determined to maintain the actual engine speed at a setpoint speed. A fuel logic circuit converts the fuel command signal to a flow rate signal actuating a fuel delivery device to supply fuel to the engine at a rate required to maintain the speed of the engine at the setpoint speed. The fuel command signal is multiplied by a desired air-fuel ratio to generate an air command signal. An air logic circuit converts the air command signal to air rate signals activating an air delivery device to deliver air to the engine at a rate such that the ratio of air-to-fuel delivered to the engine has the desired air-fuel ratio. The pro-active engine control system also includes a spark advance signal generator for generating a spark advance signal in response to actual engine speed and fuel command signals and an ignition signal generator activating the engine's spark plug at a time determined to optimize the torque of the engine in response to a rotary position signal and the spark advance signal. In the preferred embodiment, the engine is a rotary engine and the fuel is natural gas.

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First Claim