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VR/LE Engine Concept Application to the Turbocharged Diesel Engine
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English
Abstract
A variable compression ratio concept that can give a different expansion ratio to the compression ratio has been evaluated by means of a simulation of a turbocharged diesel engine. The VR/LE mechanism kinematics have been defined and described, and the compression ratio and expansion ratio have been presented as a function of the eccentric phase angle (αo). A zero-dimensional engine simulation that has been the subject of comprehensive validation, has been used as the basis of the VR/LE study. The effect of the compression ratio on the engine performance at fixed loads is presented. The principal benefits are a reduction in fuel consumption at part load of about 2%, and a reduction in ignition delay that leads to an estimated 6 dB reduction in combustion noise. The study has been conducted within the assumption of a maximum cylinder pressure of 160 bar.
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Authors
- T.J. Rychter - Warsaw University of Technology Poland
- A. Teodorczyk - Warsaw University of Technology Poland
- C.R. Stone - Brunel University United Kingdom
- H.J. Leonard - Brunel University United Kingdom
- N. Ladommatos - Brunel University United Kingdom
- S.J. Charlton - University of Bath United Kingdom
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Citation
Rychter, T., Teodorczyk, A., Stone, C., Leonard, H. et al., "VR/LE Engine Concept Application to the Turbocharged Diesel Engine," SAE Technical Paper 911788, 1991, https://doi.org/10.4271/911788.Also In
References
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