Effects of Operating Condition Parameters on Ion Current in Diesel Engine

ZHANG Zhiqiang; KANG Zhe; HU Zongjie

doi:10.3969/j.issn.1001-2222.2021.01.014

Vehicle Engine >

2021 , Vol. 0 >Issue 1: 82

DOI: https://doi.org/10.3969/j.issn.1001-2222.2021.01.014

Effects of Operating Condition Parameters on Ion Current in Diesel Engine

ZHANG Zhiqiang ,
KANG Zhe ,
HU Zongjie

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(1.Dongfeng Liuzhou Motor Co.,Ltd.,Liuzhou 545005,China;2.State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 00044,China;

3.School of Automotive Engineering,Chongqing University,Chongqing 400044,China;4.School of Automotive Studies,Tongji University,Shanghai 200092,China)

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Abstract

Based on a self-developed ion current detection system, the effects of operating condition parameters including different EGR rate, engine speed and cooling water temperature on ion current were studied on a modified 4-cylinder diesel engine with high pressure common rail. The results showed that the peak value and integrated value of ion current decreased with the increase of EGR rate and engine speed, but increased with the increase of cooling water temperature. The ion current phase CA_I50 was always later than the combustion phase CA₅₀ and the variation laws of the two were consistent under different operating condition parameters, which proved that ion current signal can express in-cylinder combustion state in diesel engine reliably.

Key words： operating condition parameter; diesel engine; ion current; detection system

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ZHANG Zhiqiang , KANG Zhe , HU Zongjie . Effects of Operating Condition Parameters on Ion Current in Diesel Engine[J]. Vehicle Engine, 2021 , 0(1) : 82 . DOI: 10.3969/j.issn.1001-2222.2021.01.014

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