重型增压预混天然气发动机动力性和排放性试验研究  

The Experimental Study of the Emission of Turbocharged Premixure CNG Engine

作　　者：罗修超 施崇槐[2] 余波[1] 彭忆强[2] 

机构地区：[1]西华大学能源与动力学院,四川成都610065 [2]西华大学汽车与交通学院,四川成都610065

出　　处：《内燃机》2015年第6期35-37,共3页Internal Combustion Engines

摘　　要：为解决天然气发动机排放问题,对严重影响天然气发动机HC和NOx排放的空燃比和点火提前角这两个参数进行试验研究。结果表明,增大点火提前角可以提高发动机功率输出,降低有效燃气消耗率和HC排放,增加NOx排放;增大空燃比,发动机功率和NOx排放下降,而有效燃气消耗率和HC排放上升,且均在稀燃极限空燃比时急剧变化。To solve CNG engines emission problem,ignition advance angle and air-fuel ratio was studied,which seriously impacted on the emission of HC and NOX.The study shows that engine power output and NOX emission show an increasing trend with the increase of the ignition advance angle,while the effective rate of gas consumption and HC emission show an decrease trend;engine power output and NOX emission show an decreasing trend with the increase of the air-fuel ratio,while the effective rate of gas consumption and HC emission show an increase trend,they all get sharply change at the air-fuel ratio of lean burn ultimate.

关 键 词：天然气发动机 发动机排放 空燃比 点火提前角 稀燃极限 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]