Test and Analysis of Thermal Management for Cooling System

LIU Xihao; DOU Jiayong; ZHANG Jing; TAN Jiansong; ZHANG Yanqing

doi:10.3969/j.issn.1001-2222.2019.02.014

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (2) : 85-92. DOI: 10.3969/j.issn.1001-2222.2019.02.014

Test and Analysis of Thermal Management for Cooling System

LIU Xihao,DOU Jiayong,ZHANG Jing,TAN Jiansong,ZHANG Yanqing

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Abstract

The thermal management of cooling system was modified and tested on a Bclass car with 1.5T GDI gasoline engine and 6AT transmission and the reduction of at least 2% fuel consumption was acquired during NEDC cycle. The results showed that the main reason of fuel consumption improvement was rapid warmup of engine. The rapid increase of wall temperature for engine body is more important than that of coolant. The effect of saving fuel by heating engine oil with coolant was lower than expect because the temperature increase of engine oil mainly depended on the heat transfer of engine body wall. The effect of heating transmission oil by coolant was obvious, the fuel consumption improvement was hence good in the WLTC cycle and realtime driving cycle, but poor in the NEDC cycle due to the limited time.

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gasoline engine

/ cooling system / thermal management / fuel consumption

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LIU Xihao,DOU Jiayong,ZHANG Jing,TAN Jiansong,ZHANG Yanqing. Test and Analysis of Thermal Management for Cooling System[J]. Vehicle Engine. 2019, 0(2): 85-92 https://doi.org/10.3969/j.issn.1001-2222.2019.02.014