基本信息:
- 专利标题： 一种实现天然气发动机超低排放的方法及系统
- 专利标题（英）：METHOD AND SYSTEM FOR IMPLEMENTING ULTRA-LOW EMISSION OF NATURAL GAS ENGINE
- 申请号：PCT/CN2021/139941 申请日：2021-12-21
- 公开(公告)号：WO2022252578A1 公开(公告)日：2022-12-08
- 发明人： 官维 , 盛利 , 林铁坚 , 宁德忠 , 刘志治 , 覃玉峰
- 申请人： 广西玉柴机器股份有限公司
- 申请人地址： 中国广西壮族自治区玉林市天桥西路88号吴可, Guangxi 537006
- 专利权人： 广西玉柴机器股份有限公司
- 当前专利权人： 广西玉柴机器股份有限公司
- 当前专利权人地址： 中国广西壮族自治区玉林市天桥西路88号吴可, Guangxi 537006
- 代理机构： 广州海心联合专利代理事务所（普通合伙）
- 优先权： CN202110610015.X 2021-06-01
- 主分类号： F01N13/00
- IPC分类号： F01N13/00 ; F01N3/10 ; F01N3/20 ; F01N3/28 ; F01N3/08
A method for implementing ultra-low emission of a natural gas engine, comprising: using emission control modes of a TWC catalyst (3), an SCR catalyst (5), and an ASC catalyst (6); controlling an in-cylinder air-fuel ratio by using the conversion efficiency of HC and CO in the TWC catalyst (3) as a target, such that the emission of the HC and the CO treated by the TWC catalyst (3) reaches a regulatory limit; and increasing the oxygen concentration of an exhaust gas treated by the TWC catalyst (3), such that the emission of NOx treated by the SCR catalyst (5) reaches the regulatory limit. Further provided is a system for implementing the ultra-low emission of the natural gas engine. In the present application, the TWC catalyst effectively converts the HC and the CO, and the oxygen concentration of the exhaust gas treated by the TWC catalyst is then increased, such that the NOx is effectively converted by the SCR catalyst, thereby implementing the ultra-low emission, and satisfying the regulatory limit.
IPC结构图谱:
| F | 机械工程；照明；加热；武器；爆破 |
| --F01 | 一般机器或发动机；一般的发动机装置；蒸汽机 |
| ----F01N | 一般机器或发动机的气流消音器或排气装置；内燃机的气流消音器或排气装置 |
| ------F01N13/00 | 以结构特点为特征的排气装置或消音装置 |