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Motiv Engines Unveils Updated Split-Cycle Engine
Motiv Engines LLC says the latest version of its so-called Clarke-Brayton cycle engine is twice as efficient as a gasoline powerplant and has 20% greater efficiency than a modern diesel.
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Motiv Engines LLC says the latest version of its so-called Clarke-Brayton cycle engine is twice as efficient as a gasoline powerplant and has 20% greater efficiency than a modern diesel.
The engine's unusual "boxer" architecture moves air through three optimized chambers, each with a different piston size. Motiv says the result is a fundamentally more efficient combustion cycle with far less heat loss and an extremely high 56.0:1 compression ratio.
The engine, which delivers a power stroke with every revolution, features reduced force to the crankshaft and bearings, lower pumping losses and less main bearing friction than a conventional engine, according to the company. Valves are operated by overhead cams.
The company's current prototype runs on diesel fuel. But Motiv intends to develop a production-ready engine fueled by liquid natural gas and designed to power heavy-duty on-highway vehicles.
The engine's basic technology was invented by Motiv's chief scientist, John Clarke while he was at Caterpillar Inc.
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