Effects of Spark Advance Angle on Combustion and Emission Characteristics of a Compressed Natural Gas Engine

Abstract:

The effects of spark advance angle on combustion and emission characteristics of a compressed natural gas engine have been investigated experimentally in this paper. The experimental data was conducted under various excessive air coefficient conditions using an electronic ignition system developed self-dependently. The results show that the peak cylinder pressure and peak rate of pressure rise ascends with the increase of spark advance angle in a certain extent, and their corresponding location are advanced. The CO emission keeps almost the same as the spark advance angle varies in the overall mode range. The HC and NOx emissions ascend with the increase of spark advance angle under the condition that excessive air coefficient is near the theoretical value. Under the lean-burn condition, the HC and NOx emissions are almost the same while the spark advance angle varies.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6085-6090
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6085
• Online since: November 2011
• Authors: Xiao Na Sun, Hong Guang Zhang, Xin Wang, Dao Jing Wang, Guo Yong Zheng, Xiao Na Sun
• Keywords: Combustion, Compressed Natural Gas Engine, Emission, Igniton System, Spark Advance Angle

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