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Compression ignition by air injection (CIBAI) has been successfully achieved in a modified single cylinder, four-stroke, spark ignition cooperative fuel research (CFR) engine. This new combustion concept has the potential to replace traditional spark ignition and high-pressure fuel injection controlled ignition. Its high ignition energy provides the capability to rapidly ignite ultra-lean air-fuel mixtures, to maximize combustion compression with associated thermal efficiency, while reducing NOX formation. This paper presents the results of the first group of experiments conducted at West Virginia University on compression ignition by air injection (CIBAI). The objective of these experiments was to demonstrate experimentally the viability of achieving ignition by air injection (CIBAI) for controlled auto-ignition (CAI) in a CFR engine.

This paper describes an IC engine fuel-system conversion to dual-fuel capability, on a carbureted Cessna 150. This conversion differs from others by adding a fuel injector in parallel to the existing carburetor. The fuel injector pump is activated when switching to ethanol. The advantage is conventional take-off and landing on either fuel with mixture full rich. Altitude leaning remains conventional. This is the first conversion to provide smooth in-flight fuel type change-over at cruise power, if the prescribed procedure is followed. This conversion method is applicable to all carbureted or fuel injected aircraft and automotive engines.