Research and Analysis of the CDV Internal-Combustion Engine Gas Distribution Phase in the Low Temperature Start Process

Abstract:

With the help of CDV internal-combustion engine start process test in the low temperature, it was investigated and analysed for the effects of the intake advance angle of gas distribution phase in the low temperature start and its exhaust-emission performance of internal-combustion engine. In the process of test ,the intake-advance angle change was from 1 °- 11 °and the valve overlap angle change was from 38 ° - 48 °. The internal-combustion engine was started according to the test number of the requirements. It was observed and calculated for starting conditions and exhaust emission with PC. The results show that the appropriate delay of intake valve open timing, and hence the change of valve timing overlap of the intake valve and exhaust valve, and the proper decrease of in-cylinder fresh intake gas, not only significantly improve the performance of internal combustion engine low temperature start combustion work, shortening start duration, but also help to reduce the quantities of HC and CO emissions during the low temperature start process.

• Periodical: Advanced Materials Research (Volumes 889-890)
• Pages: 474-478
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.889-890.474
• Online since: February 2014
• Authors: Lei Ming Shi*, Li Ge Mei, Zhi Hong Wang, Yi Ming Shao
• Keywords: Combustion, Exhaust Emission, Gas Distribution Phase, Intake-Advance Angle, Low Temperature Start

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