柴油机工况参数对离子电流影响的试验研究

张志强; 康哲; 胡宗杰

doi:10.3969/j.issn.1001-2222.2021.01.014

车用发动机 >

2021 , Vol. 0 >Issue 1: 82

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

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柴油机工况参数对离子电流影响的试验研究

张志强 ,
康哲 ,
胡宗杰

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（1.东风柳州汽车有限公司，广西柳州 545005；2.重庆大学机械传动国家重点实验室，重庆 400044；3.重庆大学汽车工程学院，重庆 400044；4.同济大学汽车学院，上海 200092）

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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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摘要

在1台改装的4缸高压共轨柴油机上，结合自行开发的柴油机离子电流检测系统，研究了EGR率、转速、冷却水温度等工况参数对柴油机离子电流特性的影响。研究结果表明：柴油机离子电流的峰值和积分值随着EGR率和转速的增大而降低，并随着冷却水温度的升高而上升；不同工况参数下，离子电流相位CA_I50总是滞后于燃烧相位CA₅₀，同时离子电流相位CA_I50和燃烧相位CA₅₀的变化规律一致，证明了离子电流信号能够可靠地反映缸内的燃烧状态。

关键词： 工况参数; 柴油机; 离子电流; 检测系统

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张志强 , 康哲 , 胡宗杰 . 柴油机工况参数对离子电流影响的试验研究[J]. 车用发动机, 2021 , 0(1) : 82 . DOI: 10.3969/j.issn.1001-2222.2021.01.014

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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