Development of the Euro 5 Combustion System for Volvo Cars' 2.4.I Diesel Engine

2009-01-1450

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
The development of a new combustion system for a light-duty diesel engine is presented. The soot-NOx trade-off is significantly improved with maintained or improved efficiency. This is accomplished only by altering the combustion chamber geometry, and thereby the in-cylinder flow. The bowl geometry is developed in CFD and validated in single cylinder tests. Tests and simulations align remarkably well. Under identical conditions in the engine the new combustion chamber decreases smoke by 11-27%, NOx by 2-11%, and maintains efficiency as compared to the baseline geometry. The injector nozzle is matched to the new bowl using design of experiments (DoE). By this method transfer functions are obtained that can be used to optimize the system using analytical tools. The emissions show a complex dependence on the nozzle geometry. The emission dependence on nozzle geometry varies greatly over the engine operating range. Finally, the system's robustness is optimized using a Monte Carlo simulation approach, to maximize the distance from the failure mode.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-1450
Pages
13
Citation
Andersson, Ö., Somhorst, J., Lindgren, R., Blom, R. et al., "Development of the Euro 5 Combustion System for Volvo Cars' 2.4.I Diesel Engine," SAE Technical Paper 2009-01-1450, 2009, https://doi.org/10.4271/2009-01-1450.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-1450
Content Type
Technical Paper
Language
English