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Achates Power developing light-duty two-stroke opposed-piston diesel engine: the OP4

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Achates Power, which is developing a family of two-stroke, compression-ignition (CI) opposed-piston (OP) engines, has designed and is developing a light-duty diesel concept engine, the OP4. Achates started with a 1.06L/cylinder engine configuration, then moved up to a 1.6L/cylinder g/kWh engine-out NO x.

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Novel opposed-piston free-piston linear generator for hybrids seeks to overcome drawbacks of earlier designs

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Secondly, the central combustion chamber is benefit for highly efficient scavenging via intake and exhaust ports without using valves. —Ling Huang 2012. Huang 2012. Ling Huang (2012) An Opposed-Piston Free-Piston Linear Generator Development for HEV (SAE 2012-01-1021) doi: 10.4271/2012-01-1021.

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LiquidPiston introduces latest X-series version of HEHC rotary engine; targeting 58% peak BTE, 2 hp/lb power density

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(LPI), the developer of engines based on its High Efficiency Hybrid Cycle (HEHC)( earlier post ), introduced the latest version of its X-series of rotary engines embodying HEHC at the US Department of Energy’s (DOE) 2012 Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Dearborn, Michigan.

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