Analysis of Optimum Valve Timing Based on Diesel Engine Comprehensive Performance

Abstract:

Article Preview

In order to investigate the effect of variable valve timing on engine power performance, fuel economy performance and emission performance quantitatively, proceed to optimize it, a high speed diese Specific Fuel Consumption, quantity of NOx and Soot, mass of fresh charge were calculated by 3-D CFD method l engine contains variable valve timing system (VVT) was researched. The effective power, at 6 speeds conditions which valve timing parameters were modulated. A method of calculating CRG was suggested. The results indicate that exhaust advance angle has a little impact on sweep and emission performance, but a big impact on ventilation losses. The optimum exhaust advance angle should be increased as engine speed rises. Increasing intake lag angle in low engine speed could increase coefficient of charge, thereby increase power performance and fuel economy performance. Comprehensive performance could be increased by decreasing intake delay angle under high speed.

Info:

Periodical:

Advanced Materials Research (Volumes 347-353)

Edited by:

Weiguo Pan, Jianxing Ren and Yongguang Li

Pages:

4118-4124

DOI:

10.4028/www.scientific.net/AMR.347-353.4118

Citation:

M. M. Wang and R. X. Li, "Analysis of Optimum Valve Timing Based on Diesel Engine Comprehensive Performance", Advanced Materials Research, Vols. 347-353, pp. 4118-4124, 2012

Online since:

October 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.