润滑油灰分对GPF过滤效率影响的试验研究

汤东; 刘胜; 华伦

车用发动机 ›› 2021, Vol. 0 ›› Issue (2) : 32-37.

栏目

润滑油灰分对GPF过滤效率影响的试验研究

汤东¹，刘胜¹，华伦²

作者信息 +

Influences of Lubricating Oil Derived Ash on GPF Filtration Efficiency

TANG Dong¹,LIU Sheng¹,HUA Lun²

Author information +

文章历史 +

摘要

基于润滑油掺烧快速老化方法，在发动机台架上研究灰分对GPF背压和发动机动力性的影响；基于世界统一的轻型车测试循（WLTC）整车试验和实际道路测试（RDE）研究了灰分对GPF过滤效率的影响。结果表明：灰分沉积会提高发动机的排气背压，降低发动机的动力性，60 g灰分量时背压最大升高8.8 kPa，扭矩下降3.7 N·m；WLTC工况第一阶段PN排放贡献率大于90%，且WLTC和RDE工况少量灰分即可显著提高GPF对PN的过滤效率，3 g灰分量下过滤效率可达96.6%；过滤效率随着灰分量的增加而增大，60 g灰分样件的PN过滤效率达到99.6%。

Abstract

Based on the rapid ash accumulation method of lubricating oil blending, the effects of ash on back pressure of GPF and engine power performance were studied on an engine bench. The filtration efficiency of GPF was analyzed according to the WLTC and RDE test. The results show that the ash deposit will increase the exhaust back pressure and decrease the engine power output. The 60 g ash deposit will increase the back pressure by 8.8 kPa at most and decease the torque by 3.7 N·m. The contribution rate of PN emission in the first stage of WLTC test is larger than 90%, and a small amount of ash in WLTC and RDE conditions can significantly improve the filtration efficiency of GPF to PN. The filtration efficiency can be up to 96.6% with 3 g ash deposit. Accordingly, the filtration efficiency increases with the increase of ash deposit and the PN filtration efficiency can reach 99.6% with 60 g ash sample.