Double Expansion Engine with Dynamic Compression Ratio (DEE DCR)

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Double Expansion Engine with Dynamic Compression Ratio (DEE-DCR). Electrification of vehicle fleets will require a parallel step change evolution in internal combustion engines (ICEs) to preserve consumers’ current access to mobility and delivery services. Increasingly, ICEs will be a range extender or auxiliary unit for battery-powered electric traction motors. HIKA ENGINES LIMITED have partnered with Universities and technology development companies to develop an engine that overcomes the inherent limitations of Otto cycle engines. We have devised a mechanically simple, robust mechanism to vary compression ratio according to load- dynamic compression ratio- DCR. We have also designed new linkages and layouts to recover energy normally lost to the exhaust, via auxiliary expansion cylinders directly connected to the crankshaft- a double expansion engine with dynamic compression ratio (DEE-DCR). This engine meets key requirements of an ‘ICE of the future’ We see four market applications for this engine • Range extending demanding duties for electric vehicles, e.g. urban light commercial • Marine propulsion • Refrigerated transport • Off highway vehicles Summary(also see www.hikaengines.com) Re-expansion of exhaust gases to recover lost energy and reduces carbon footprint. No need for turbo charging due to its unique 4 auxiliary expansion cylinders…(The effects of a turbocharger is built in, and remaining energy from the exhaust gases transferred to the engine shaft) Dynamic Compression Ratio (DCR) 8:1 to 14:1,- simple design with very few parts involved. (auto/electronically adjusted to City driving conditions and long distance). Unique piston to crankshaft connection called Twin Fixed Vector Movement (TFVM )- providing 100% balance on inertia forces. A Dimensionally small engine combined with low noise, low fuel consumption, vibration free with a High Power/weight Ratio) and scaleable