非道路小型柴油机降低机油耗的研究

A Study of Lubricating Oil Consumption Reduction for the Non-Road Small Diesel Engines

以186FA柴油机为样机,通过对曲轴箱负压、配缸间隙、气缸孔实际工作圆柱度及活塞环参数改进试验和分析,得出了小型单缸柴油机减少机油消耗量降低颗粒排放的技术措施和机理。经控制参数优化,186FA柴油机机油耗由2.31g/(kW·h)降至0.65g/(kW·h),柴油机颗粒排放降低至0.43g/(kW·h)。加装氧化催化剂后处理,柴油机达到了美国EPA Tire4排放限值和安全要求。

Nitrogen oxide and particulate emissions are the main harmful emissions from diesel engines, especially the particulate emissions from mass-produced small diesel engines because of its hardly controlled conformity of production. It mainly due to the fact that the lubricating oil consumption affecting particulate emissions is difficult to be controll precisely. The experimental tests and analysis of the crankcase vacuum, the cylinder gap, the actual cylinder cylindricity and piston ring geometrical parameters were carried out on a 186FA, diesel engine to obtain the technical measures and mechanisms for lower lubricating oil consumption and particulate emissions of single-cylinder small diesel engines. After the parameter optimization, the lubricating oil consumption of the 186FA diesel enging has been dropped from 2. 31 g/（kW · h） to 0. 65 g/（kW, h） and its particulate emissions reduced to 0. 43 g/（kW · h）. The diesel engine with retrofired oxidation catalyst will comply with U.S. EPA TireⅣ emission regulation and safety requirements.