润滑油灰分对直喷汽油机颗粒捕集器性能影响

doi:10.13229/j.cnki.jdxbgxb20210342

摘要/Abstract

摘要：

为研究不同灰分等级润滑油对汽油机颗粒捕集器（GPF）耐久性能的影响，本文基于快速老化试验，分析了灰分累积对发动机转矩、油耗、背压、过滤效率、气体污染物转化效率以及储氧性能的影响。结果表明：润滑油灰分等级越高，加载在GPF中的灰分越高，灰分的捕集率也越高；灰分累积会使发动机动力性能和GPF催化性能都有所下降，但一定量的灰分可以提高GPF的过滤效率，降低PN的排放。

关键词: 动力机械及工程, 汽油机颗粒捕集器, 灰分, 润滑油, 耐久性能, 催化性能

Abstract:

In order to study the influence of different ash grade lubricants on the durability of gasoline particle filter（GPF）， the effects of ash accumulation on engine torque， fuel consumption， back pressure， filtration efficiency， gas pollutant conversion efficiency and oxygen storage performance were analyzed based on the rapid aging test. The results show that the higher the ash grade of lubricating oil， the higher the ash content in GPF and the higher the ash trapping rate. Ash accumulation will decrease the engine dynamic performance and the catalytic performance of GPF， but a certain amount of ash can improve the filtration efficiency of GPF and reduce PN emissions.

Key words: power machinery and engineering, gasoline particulate filter, ash, lubricating oil, durability, catalytic performance

中图分类号:

TK417

汤东,韩宇彬,华伦,潘金冲,刘胜. 润滑油灰分对直喷汽油机颗粒捕集器性能影响[J]. 吉林大学学报(工学版), 2022, 52(11): 2501-2507.

Dong TANG,Yu-bin HAN,Lun HUA,Jin-chong PAN,Sheng LIU. Effect of lubricating oil ash on performance of gasoline particle filter in direct injection gasoline engine[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(11): 2501-2507.

图/表 11

表1

表2

表3

TWC和GDF基本参数"

参数

TWC

GPF

载体材料

堇青石

载体尺寸/（mm $×$ mm）

贵金属涂覆量/（g·cft^-1）

催化剂种类

贵金属比例

载体目数/cpsi

壁厚/mm

$?$ 118.4×91

铑∶钯

40∶20

750

0.0508

$?$ 118.4×101.6

铑∶钯

5∶5

300

0.2032

表3

图1

图2

图3

图4

图5

图6

图7

图8

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