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A Variable Compression Ratio Engine Development
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English
Abstract
This paper describes the theory, mechanical execution, and development of an automatic, hydraulically-actuated piston that provides a practical method of obtaining a variable compression ratio engine. When applied to compression-ignition engines, an increase in output of 50% (0.5 to 0.75 bhp/cu in.) has been achieved without a corresponding increase in maximum combustion pressure. By providing a high compression ratio for starting and light load conditions, the engine has demonstrated substantial improvements in cold starting ability as well as improved potential for multifuel operation.
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Wallace, W. and Lux, F., "A Variable Compression Ratio Engine Development," SAE Technical Paper 640060, 1964, https://doi.org/10.4271/640060.Also In
References
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