The Tour engine design permits reducing the two big energy losses that exist in current IC engines because it separates the location of the cold strokes from the hot strokes, thus enabling superior thermal management:
- Less energy is lost to the radiator – The Cold-Cylinder that hosts the Intake and Compression strokes remains cooler as the combustion stroke occurs only in the Hot-Cylinder. Consequently, less cooling is needed and therefore less energy is lost to the radiator.
- Less energy is lost to the exhaust – The Hot-Cylinder is designed to be larger than the Cold-Cylinder to maximize the conversion of heat/pressure energy to piston kinetic energy at the combustion stroke, as the combusted gas expands more fully.
The split-cycle design proves not only to be more efficient but also less polluting:
- Up to 30% decrease in CO2 emission
- Potential for a substantial decrease in NOx emission
- Reduction in CH and CO emission
Variable compression ratio for multi-fuel engine application
The Tour engine compression ratio (CR) is set by the two crankshafts relative phase angle (smaller angle = higher CR). Since the Tour engine may utilize two crankshafts rather than one, one can remotely (or through computerized controller) manipulate the engine CR as a function of engine performance and/or fuel in use (liquid or gas).
Additional advantages of the Tour engine include high-grade waste energy capture, complete combustion, efficient intake and efficient compression. These advantages and others are further described in internal documents (available upon request and NDA).