| 李薛，曾志新，张凯，骆洪燕.带汽油机颗粒捕集器的后处理系统台架快速老化研究[J].内燃机工程,2021,42(6):88-94. |
| Study on Accelerated Aging of Exhaust Aftertreatment System with Gasoline Particulate Filter by Engine Bench |
| DOI：10.13949/j.cnki.nrjgc.2021.06.012 |
| Key Words:gasoline particulate filter(GPF) bench accelerated aging lube oil catalyst performance worldwide harmonized light vehicles test cycle(WLTC) |
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| Abstract:An accelerated aging experiment of aftertreatment system(ATS) with gasoline particulate filter(GPF) was studied on a 1.5L turbocharge gasoline direct inject(TGDI) engine and a relevant vehicle. Two sets of same ATS were aged on the engine bench based on standard bench cycle(SBC), the aging time was same as 200000km durability on the vehicle. One set only suffered with high temperature while the normal fuel was used for this test. The other one set suffered with high temperature and ash at the same time, fuel blended with lube oil was used for this test, and the lube oil amount equaled to consumption after 200000km usage. The ash weight, GPF backpressure, catalyst performance and worldwide harmonized light vehicles test cycle(WLTC) emission were reviewed during the aging process. The results show that, after the aging test the ash is mainly stored in the central area at the bottom of GPF, with a total weight 12.1g and 38.9g respectively. The backpressure of GPF increase sharply in the first 20000~50000km and then increase steadily. The aging process used fuel blended with lube oil has a certain acceleration effect on the performance degradation of the three ways catalyst(TWC), but has no obvious effect on the performance of the GPF. The WLTC emission test results are deteriorated more serious with the second kind of accelerated aging ATS, but WLTC test results with both ATS are worse than the durability vehicles, the difference between THC/CO results are small, while obvious between NOx results. The GPF can be a high filtration efficiency state in a short equivalent mileage when aging use fuel blended with lube oil. |
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