GPF regeneration characteristics of PFI gasoline vehicle
PENG Meichun¹, LI Junping¹, YE Weibin¹, CHEN Yue¹, HUANG Wenwei²
1. School of Electro-mechanic Engineering, Guangdong University of Technology, Guangzhou 510006, China;
2. School of Automotive and Transportation Engineering, Shenzhen Polytechnic College, Shenzhen 518055, China
Abstract: This paper studied the characteristics of GPF regeneration operating modes of PFI light duty gasoline vehicle on road, analyzed the relationship among vehicle operating modes and GPF's regeneration parameters λ, inlet temperature of GPF ${T}_{\rm in}$, and CO₂ and PM emission characteristics during regeneration. It is concluded that it can easily met the regeneration conditions of λ≥1.05, ${T}_{\rm in}$≥450 ℃ when vehicle runs at 40 km/h to 100 km/h, 1 400 r/min to 2 200 r/min, and acceleration or deceleration operation. It is found the proportion of operation time to meet the regeneration conditions can reach 19.18% in highway, 8.56% in suburban, and 3.26% in urban. This test explores two typical regeneration modes, one is the rapid deceleration regeneration at the medium and high vehicle speed, the deceleration reaches –2.45 m/s², the initial ${T}_{\rm in}$ is about 700 ℃, and the λ increases from 1.01 to 1.30. The other situation is rapid acceleration regeneration at medium vehicle speed, acceleration reaches 1.0 m/s², λ increases to 1.35, and ${T}_{\rm in}$ increases above 750 ℃. The PM emission concentration increases during regeneration, the CO₂ emission increases during the accelerated regeneration, but keeps relatively stable during deceleration regeneration.
Keywords: vehicle engineering;GPF;regeneration conditions;regeneration operating modes;real road driving
2023, 49(9):161-166  收稿日期: 2021-11-20;收到修改稿日期: 2022-02-24
基金项目: 深圳市环境科研课题资助项目（2019XY1368STZF）
作者简介: 彭美春（1963-），女，湖南衡阳市人，教授，博士，从事机动车排放污染控制研究
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