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Experimental Investigation of the Heat Release Rate in a Sinusoidal Spark Ignition Engine
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English
Abstract
Compression and power stroke cycles for a 4 stroke cycle spark ignition engine modified by extending the connecting rod to simulate purely sinusoidal piston motion are analyzed over a range of operating speeds and are compared with those of a similar conventional engine. Heat release rate is estimated for both engines using a simple Wiebe function with the functional parameters found via a simplex curve fitting method used in conjunction with experimental pressure curves. It is shown that the functional parameters which represent the combustion and the duration of fuel burn are slightly larger over the range of operation in the sinusoidal engine while the shape factor remains largely the same. However, the pressure-crank angle curves are sufficiently similar such that conventional slider-crank curves can be used to model sinusoidal engines, which was the motivation behind this research.
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Authors
Citation
George, A., Clark, N., Smith, J., and Cox, J., "Experimental Investigation of the Heat Release Rate in a Sinusoidal Spark Ignition Engine," SAE Technical Paper 890778, 1989, https://doi.org/10.4271/890778.Also In
References
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