冷却系统热管理测试分析

刘系暠; 豆佳永; 张静; 谭建松; 张艳青

doi:10.3969/j.issn.1001-2222.2019.02.014

车用发动机 >

2019 , Vol. 0 >Issue 2: 85 - 92

DOI: https://doi.org/10.3969/j.issn.1001-2222.2019.02.014

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冷却系统热管理测试分析

刘系暠 ,
豆佳永 ,
张静 ,
谭建松 ,
张艳青

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(北京汽车股份有限公司汽车研究院，北京 101106)

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Test and Analysis of Thermal Management for Cooling System

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

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（BAIC Motor Co.，Ltd.,R&D Center，Beijing 101106，China）

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摘要

在一辆搭载1.5T增压直喷汽油机和6速自动变速箱的B级车上，针对冷却系统进行了热管理改制与效果测试，取得了至少2%的NEDC循环油耗降低。研究结果表明：燃油消耗率降低最主要的原因是发动机快速暖机，其中机体壁温的快速升高比冷却液快速升温更为重要；冷却液对发动机润滑油的加热对于降低燃油消耗率作用低于预期，发动机润滑油的升温主要依靠机体壁面传热；冷却液对发动机变速箱油的加热作用明显，但受限于NEDC循环时间，节油贡献较小，在更长的WLTC循环或实际驾驶循环中，节油贡献会更大。

关键词： 汽油机; 冷却系统; 热管理; 燃油消耗率

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刘系暠 , 豆佳永 , 张静 , 谭建松 , 张艳青 . 冷却系统热管理测试分析[J]. 车用发动机, 2019 , 0(2) : 85 -92 . DOI: 10.3969/j.issn.1001-2222.2019.02.014

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.

Key words：

gasoline engine

; cooling system; thermal management; fuel consumption

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