小型发动机活塞冷却喷射系统对排放的影响

俞晓璇¹，齐斌²，王三波¹，王海峰¹，王炜¹，岳季¹

1.上汽通用东岳动力总成有限公司，山东 烟台  264006；

2.泛亚汽车技术中心，上海  200120

摘要：为研究活塞冷却喷射系统对排放的影响，对取消整个活塞冷却喷射系统、取消活塞冷却喷嘴控制阀及正常安装冷却喷嘴和冷却喷嘴控制阀3种情况进行国六全球轻型车辆测试循环试验。试验结果分析表明:取消整个活塞冷却喷射系统和仅取消活塞冷却喷嘴电磁阀导致颗粒物（particulate matter，PM）、粒子数量（particle number，PN）、总碳氢化合物（THC）、CO排放升高，由于试验车辆原始状态排放水平较好，未超过国六b排放限值；取消整个活塞冷却喷射系统对PM、PN、CO排放影响较大；取消活塞冷却喷嘴控制阀对PM、PN、CO排放影响较小。考虑到车辆存在个体差异，在发动机硬件开发设计时建议只取消活塞冷却喷嘴电磁阀。

关键词：活塞冷却喷射系统；冷却喷嘴；排放;控制阀

Influence of piston cooling injection system on emission of a small gasoline engine

YU Xiaoxuan¹, QI Bin², WANG Sanbo¹, WANG Haifeng¹, WANG Wei¹, YUE Ji¹

1.SAIC General Motors DongYue Powertrain Co.,Ltd., Yantai 264006, China;

2.Pan Asia Technical Automotive Center Co.,Ltd., Shanghai 200120, China

Abstract：In order to study the impact of piston cooling injection system on emission, the CHINA 6 light vehicle test is carried out under three conditions:canceling the whole piston cooling injection system, canceling the piston cooling nozzle control valve only and normal installation of cooling nozzle and cooling nozzle control valve. The analysis of test results shows that the cancellation of the whole piston cooling injection system and only the piston cooling nozzle control valve lead to the increase of particulate matter (PM), particle number (PN), total hydrocarbon (THC) and CO emissions, due to the good emission level of original test vehicle, which meets phase b of CHINA 6 emission limit. Canceling the whole piston cooling injection system has a great impact on PM, PN and CO emissions, while canceling the piston cooling nozzle control valve has little impact on PM, PN and CO emissions. Considering the individual differences of vehicles, it is recommended to cancel the piston cooling nozzle solenoid valve only in the development and design of engine hardware.

Keywords:piston cooling injection system；cooling injector；emission；control valve