| 摘要:某型大功率柴油机的排放值不满足非道路国四排放法规的要求，为此，对该柴油机燃油喷射系统、燃烧系统、增压系统和后处理系统进行优化设计和匹配。优化喷油策略，使柴油机的PM、CO和HC排放降低到非道路国四限值以下；安装选择性催化还原系统以降低NOx排放。标定试验结果表明，升级后的柴油机满足非道路国四排放法规要求。 |
| 关键词: 大功率柴油机 排放 喷油策略 选择性催化还原系统 |
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| Emission Control Technologies of High-Powered Diesel Engines to Meet Non-Road China Ⅳ Regulation |
| WANG Xin,ZHANG Xiangchen,WU Yalong,NIE Zhibin,HAN Li,NIU Xiaoxiao,MENG Lianghu |
| Henan Diesel Engine Industry Co.， Ltd.，Luoyang 471003，China |
| Abstract:The emissions of a high-powered diesel engine could not meet non-road China Ⅳ regulation.Therefore，the design and matching of the fuel injection system，combustion system，supercharging system and after-treatment system of the diesel engine were optimized.By optimizing the injection strategies，the particulate matter，CO，and HC emissions of the diesel engine were reduced to satisfy the non-road China Ⅳ emission limit，and a selective catalytic reduction（SCR）system was installed to remove NOx emissions.The calibration test results showed that the upgraded diesel engine met the non-road China Ⅳ regulation. |
| Key words: high-powered diesel engine emission injection strategy selective catalytic reduction system |
