发动机机油结冰问题分析与改进

田身军，张欣林，李加旺，项大伟，李德银，姜维

芜湖埃科泰克动力总成有限公司研发中心，安徽芜湖241009

摘要：为解决直喷增压发动机在冬季寒带地区出现的机油含水量增加导致机油结冰问题，对4款车辆进行冬季路试循环工况测试，从曲轴箱强制通风装置、冷却系统、零部件设计、机油集滤器、用车习惯等方面提出改进措施。结果表明：采用深呼吸的曲轴箱强制通风装置、冷却系统中加装温控阀、集成排气歧管缸盖技术、减少曲轴箱内部表面积等主动改进措施，以及增大机油集滤器滤网面积、增大滤网圆孔直径、定期增加市郊或高速行驶工况等被动改进措施可有效降低机油含水量，避免机油结冰。

关键词：机油；结冰；主动措施；被动措施

Analysis of engine oil freezing and its improvement

TIAN Shenjun，ZHANG Xinlin，LI Jiawang，XIANG Dawei，LI Deyin，JIANG Wei

Research and Development Center, Wuhu Ecotech Powertrain Co., Ltd., Wuhu 241009, China

Abstract：In order to solve the freezing problem of direct injection turbocharged engines due to the increase of water in oil during winter, four kinds of vehicles are selected for winter road test. Improvements are tested from the aspects of the crankcase forced ventilation device, cooling system, parts, filter collector, vehicle usage, etc. The results show that active improvements such as deep breathing forced crankcase ventilation, temperature control valves in the cooling system, integrated exhaust manifold cylinder head technology, reducing the internal surface area of the crankcase, and passive improvements such as increasing the filter screen area of the oil filter, increasing the diameter of the filter screen round hole, and advising customers to regularly increase suburban or high-speed driving conditions can effectively reduce the water content in the oil, avoid oil freezing.

Keywords:engine oil; freeze; active improvement; passive improvement