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Influence of the Post-Injection Pattern on Performance, Soot and NOx Emissions in a HD Diesel Engine
Technical Paper
2002-01-0502
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The main objective of the study described in this paper is to explore the potential of different post-injection patterns, with a plain common rail system, for reduction of soot emissions in HD diesel engines.
Test have been carried out in a single-cylinder engine at several critical engine operation points from the European Steady state test Cycle (ESC). At these operation points, EGR was introduced to reduce NOx emissions to a given value, and then different post-injection patterns were produced. A parametric study was performed, considering the time between injections and the post-injected fuel mass as the main variables. In every case the total injected fuel mass was kept constant.
Aside from the experimental data obtained in the engine tests, a diagnosis model was applied to calculate heat release laws and other parameters depicting the combustion process.
The results obtained allowed to discern the effects produced by the different post-injection patterns and to assess their potential for Soot emissions reduction, keeping NOx emissions and fuel consumption at the original values.
Authors
Citation
Payri, F., Benajes, J., Pastor, J., and Molina, S., "Influence of the Post-Injection Pattern on Performance, Soot and NOx Emissions in a HD Diesel Engine," SAE Technical Paper 2002-01-0502, 2002, https://doi.org/10.4271/2002-01-0502.Also In
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