Performance Optimization of Diesel Engines with Variable Intake Valve Timing Via Genetic Algorithms Engine Research Center, University of Wisconsin-Madison

Format:

Conference/Event

Author/Creator:

Munnannur, Achuth, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

The strategy of variable Intake Valve Closure (IVC) timing, as a means to improve performance and emission characteristics, has gained much acceptance in gasoline engines; yet, it has not been explored extensively in diesel engines. In this study, genetic algorithms are used in conjunction with the multi-dimensional engine simulation code KIVA-3V to investigate the optimum operating variables for a typical heavy-duty diesel engine working with late IVC. The effects of start-of-injection timing, injection duration and exhaust gas recirculation were investigated along with the intake valve closure timing. The results show that appreciable reductions in NOx+HC (82%), soot (48%) and BSFC (7.4%) are possible through this strategy, as compared to a baseline diesel case of (NOx+HC) = 9.48g/kW-hr, soot = 0.17 g/kW-hr and BSFC = 204 g-f/kW-hours The additional consideration of double injections helps to reduce the high rates of pressure rise observed in a single injection scheme. In this context, an illustration of a modified prioritization of the emission targets in optimization studies, which may be crucial to attaining aggressive emission standards, is also provided. This study provides a direction for heavy-duty diesel engines to meet future stringent emission mandates

Notes:

Vendor supplied data

Publisher Number:

2005-01-0374

Access Restriction:

Restricted for use by site license