Experimental Research on Low Temperature Combustion under Coupled Effect of EGR Rate and Intake Temperature

YANG Xinxin; SHI Lei; QU Shuan; LIU Sheng; CAO Jie; DENG Kangyao; YANG Zhenhuan

doi:10.3969/j.issn.1001-2222.2017.03.002

Vehicle Engine ›› 2017, Vol. 0 ›› Issue (3) : 8-13. DOI: 10.3969/j.issn.1001-2222.2017.03.002

Experimental Research on Low Temperature Combustion under Coupled Effect of EGR Rate and Intake Temperature

YANG Xinxin1， SHI Lei1， QU Shuan2， LIU Sheng2， CAO Jie2， DENG Kangyao1, YANG Zhenhuan2

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Abstract

Based on the hot and cold dual circuit EGR, the
impacts of EGR rate and intake temperature on combustion performance and
emissions and the coupled laws on EGR rate and intake temperature at the upper
limit of low temperature combustion load were studied through decoupling of
intake temperature and EGR rate. The results showed that the rise of intake
temperature dominated in the dilution effect of intake charge at the upper load
limit, but suppressed the combustion. The combustion timing advanced and the
combustion duration increased at low EGR rate and high intake temperature and
the indicated work and the mean effective pressure increased at high EGR rate
and low intake temperature. In addition, the NOx emission decreased with the increase of EGR rate and the HC and CO
emissions increased with the increase of intake temperature.

Key words

internal combustion engine；exhaust gas recirculation / intake temperature / combustion / emission

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YANG Xinxin， SHI Lei， QU Shuan， LIU Sheng， CAO Jie， DENG Kangyao, YANG Zhenhuan. Experimental Research on Low Temperature Combustion under Coupled Effect of EGR Rate and Intake Temperature[J]. Vehicle Engine. 2017, 0(3): 8-13 https://doi.org/10.3969/j.issn.1001-2222.2017.03.002