Piston kinematics

The MCE-5 piston kinematics is strictly identical to that of a conventional engine with the same rod/crank ratio. Its kinematics never varies, whatever the Compression Ratio:

As can be seen on this graph, the Top Dead Center of MCE-5 is always located on the crankshaft zero position whatever the Compression Ratio. These characteristics will permit to implement VCR on future SI engines by making the most of engine designers’ know-how and knowledge related to internal aerodynamics of conventional engines.

Thanks to this conservative feature, future VCR engines’ development will benefit from piston kinematics, volume variation laws and resulting impacts on combustion, performance and pollutants generation control that are mastered from decades by the automotive industry.

(see: VCR engines’ requirements for mass-production: piston kinematics)