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PCCI Investigation Using Variable Intake Valve Closing in a Heavy Duty Diesel Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 16, 2007 by SAE International in United States
Annotation ability available
Parametric tests using various EGR amounts, boost intake pressures, fueling rates, intake valve closings (IVC), injection pressures, and start-of-injection timings were executed to explore the limitations and potential of an intake valve actuation system on a heavy-duty diesel engine. At high-speed, intermediate load (56%) operation, constant airflow and no EGR, the use of late intake valve closing enabled a 70% NOx reduction while maintaining PM levels. Through an investigation using low load operation, late IVC, and reduced intake pressure, 2010 not-to-exceed NOx and PM emissions (0.25 g/kW-hr NOx, 0.02 g/kW-hr PM) were achieved with 40% EGR. At medium load, constant air flow, and early SOI, it was found that the NOx, HC and BSFC levels at a late IVC with 30%EGR were comparable to those with the stock camshaft IVC timing of 143°BTDC with 40%EGR. In comparison, the CO and PM levels decreased by nearly 70% with the use of late IVC timing and less EGR. Through these parametric studies, it was concluded that the use of late IVC actuation is successful in controlling combustion phasing and emissions.
- Ryan M. Nevin - Mechanical Engineering Department, University of Wisconsin-Madison
- Yong Sun - Mechanical Engineering Department, University of Wisconsin-Madison
- Manuel A. Gonzalez D. - Mechanical Engineering Department, University of Wisconsin-Madison
- Rolf D. Reitz - Mechanical Engineering Department, University of Wisconsin-Madison
CitationNevin, R., Sun, Y., Gonzalez D., M., and Reitz, R., "PCCI Investigation Using Variable Intake Valve Closing in a Heavy Duty Diesel Engine," SAE Technical Paper 2007-01-0903, 2007, https://doi.org/10.4271/2007-01-0903.
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