Generation Mechanism of Super Knock and Knock Suppression for TGDI Engine

MIAO Ruigang; ZENG Xiaochun; CAO Liming; JING Guoxi

doi:10.3969/j.issn.1001-2222.2021.06.001

Vehicle Engine >

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

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

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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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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MIAO Ruigang , ZENG Xiaochun , CAO Liming , JING Guoxi . Generation Mechanism of Super Knock and Knock Suppression for TGDI Engine[J]. Vehicle Engine, 2021 , 0(6) : 1 -8 . DOI: 10.3969/j.issn.1001-2222.2021.06.001

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