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Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion
Technical Paper
2002-01-1115
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper explores the possibility to extend the low-temperature combustion concept developed for low load conditions to medium load conditions of HSDI DI Diesel engines. The aim is to understand which is the limit of conventional Diesel combustion towards smoke-lees and NOx-less conditions. The present research is based on numerical simulations performed by using the Kiva-3 code updated with physical sub-models. The combined influence of EGR cooling and EGR rate on combustion characteristics and emission formation is analyzed. Then, possible improvements to mixture formation are discussed with particularly emphasis on the use of multiple injection. The calculations show that smoke-less conditions by low-temperature combustion cannot be achieved at medium load and therefore a great role is played by mixture formation. Simulations have revealed that promoting leaner mixtures during spray combustion with further significant benefits on soot engine-out emissions is difficult to accomplish.
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Bianchi, G., Cazzoli, G., Pelloni, P., and Corcione, F., "Numerical Study Towards Smoke-Less and NOx-Less HSDI Diesel Engine Combustion," SAE Technical Paper 2002-01-1115, 2002, https://doi.org/10.4271/2002-01-1115.Also In
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