摘要
基于一台装有汽油机颗粒物捕集器(GPF)的1.4T进气道燃油喷射(PFI)发动机研究了发动机在不同负荷下的原始颗粒物排放特性和不同灰分载量对GPF过滤性能的影响。结果表明:在中小负荷下,发动机排放的颗粒物主要为核模态,在大负荷下,则存在粒径10~25 nm的核模态和100~200 nm的积聚模态颗粒物;灰分载量对GPF的工作特性有较大影响,灰分载量为0的GPF对颗粒物的捕集率约为85%,而灰分载量为5 g/L的GPF捕集率达97%;发动机排气背压、温度和燃油消耗率随GPF灰分载量的增加而提高,灰分载量为20 g/L时的燃油消耗率相比灰分载量为0时提高了3%~7%。
The effect of original particulate emission characteristic under different load and different ash loading capacity on Gasoline Particulate Filter(GPF) performance is studied for a 1.4 T Port Fuel Injection(PFI) engine equipped with GPF. The results show that under light and medium loads, soot exists mainly in nuclear mode under medium and small load. Under heavy load, nuclear mode between 10~25 nm and accumulation mode between 100~200 nm both exist. The results show that the ash loading has a great influence on GPF working characteristics. The GPF with ash loading of 0 g/L can catch about 85% soot particulates, while the GPF with 5 g/L ash loading has the filtration efficiency up to 97%. With the increase of ash loading on GPF, the exhaust back pressure, temperature and the fuel consumption rate of the engine also increase. The fuel consumption rate under 20 g/L ash loading increases by 3%~7% compared with 0 g/L.
作者
李笑杰
邓俊
李梦迪
姚宇航
李理光
Li Xiaojie;Deng Jun;Li Mengdi;Yao Yuhang;Li Liguang(School of Automotive Studies,Tongji University,Shanghai 201804;Chinesisch-Deutsches Hochschulkolleg,Tongji University,Shanghai 200092)
出处
《汽车技术》
CSCD
北大核心
2020年第3期15-20,共6页
Automobile Technology
基金
国家自然科学基金项目（51761135105）
KSPG教席基金项目
