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: 10.3969/j.issn.1001-2222.2021.06.001

Generation Mechanism of Super Knock and Knock Suppression for TGDI Engine

MIAO Ruigang¹,ZENG Xiaochun¹,CAO Liming¹,JING Guoxi^2,3

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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.

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