增压直喷汽油机超级爆震发生机理以及爆震抑制的试验研究

苗瑞刚; 曾小春; 曹黎明; 景国玺

doi:10.3969/j.issn.1001-2222.2021.06.001

车用发动机 >

2021 , Vol. 0 >Issue 6: 1 - 8

DOI: https://doi.org/10.3969/j.issn.1001-2222.2021.06.001

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增压直喷汽油机超级爆震发生机理以及爆震抑制的试验研究

苗瑞刚 ,
曾小春 ,
曹黎明 ,
景国玺

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（1.江铃汽车股份有限公司产品研发总院，江西南昌 330001；2.河北工业大学机械工程学院，天津 300400；3.天津市新能源汽车动力传动与安全技术重点实验室，天津 300130）

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Generation Mechanism of Super Knock and Knock Suppression for TGDI Engine

MIAO Ruigang ,
ZENG Xiaochun ,
CAO Liming ,
JING Guoxi

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(1.JiangLing Motors Co.,Ltd.,Nanchang 330001,China;2.School of Mechanical Engineering,Hebei University of Technology,Tianjin 300400,China;3.Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles,Tianjin 300130,China)

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摘要

开发高增压缸内直喷汽油机面临的最大挑战是其在低速大负荷工作时所遇到的低速提前点火以及由此引发的超级爆震。对某1.5 L高增压发动机低速提前点火的发生机理以及爆震强度的抑制方法进行了试验研究。试验结果证明，超级爆震强度受空燃比、冷却液的温度，以及燃油对曲轴箱机油的稀释等因素的影响。合理控制缸内混合气点火条件及燃烧的参数可以有效地控制超级爆震的强度。

关键词： 直喷增压汽油机; 爆震; 冷却液温度; 空燃比

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苗瑞刚 , 曾小春 , 曹黎明 , 景国玺 . 增压直喷汽油机超级爆震发生机理以及爆震抑制的试验研究[J]. 车用发动机, 2021 , 0(6) : 1 -8 . DOI: 10.3969/j.issn.1001-2222.2021.06.001

Abstract

The largest challenge in developing highlyboosted TGDI engine is the low-speed pre-ignition and its induced super knock under high load condition of low speed. Hence the mechanism of low-speed pre-ignition and knock suppression were researched on a 1.5 L TGDI engine. The test results show that the super knock intensity is affected by factors such as the airfuel ratio, the coolant temperature and the dilution of crankcase oil from fuel. Reasonable control of incylinder ignition conditions and combustion parameters can effectively control the intensity of super knock.

Key words： TGDI engine; knock; coolant temperature; air-fuel ratio

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