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China 6 EGR gasoline vehicles without a GPF may struggle to meet the potential SPN10 limit

Wang, Yachao LU ; Su, Sheng ; Lai, Yitu ; Luo, Wanyou ; Hou, Pan ; Lyu, Tao and Ge, Yunshan (2023) In Environment International 181.
Abstract

Particles larger than 10 nm from engine exhaust are gaining global concerns. In light of this, to investigate how EGR affects gasoline vehicle SPN10 (solid particles larger than 10 nm) emissions, seven gasoline vehicles (hybrid or conventional) were studied experimentally. The results revealed that EGR vehicles risk failing the current limit (6 * 1011 #/km) more than those without EGR if the cut-off size was tightened from 23 nm to 10 nm. More specifically, during the WLTC test, EGR increased the SPN10 emission factors by 2 ∼ 3 times depending on vehicle powertrains (conventional or hybrid). Notably, SPN10 emissions increased significantly when EGR was actively engaged but showed a decrease when the EGR rate remained... (More)

Particles larger than 10 nm from engine exhaust are gaining global concerns. In light of this, to investigate how EGR affects gasoline vehicle SPN10 (solid particles larger than 10 nm) emissions, seven gasoline vehicles (hybrid or conventional) were studied experimentally. The results revealed that EGR vehicles risk failing the current limit (6 * 1011 #/km) more than those without EGR if the cut-off size was tightened from 23 nm to 10 nm. More specifically, during the WLTC test, EGR increased the SPN10 emission factors by 2 ∼ 3 times depending on vehicle powertrains (conventional or hybrid). Notably, SPN10 emissions increased significantly when EGR was actively engaged but showed a decrease when the EGR rate remained constant. EGR and the enriched fuel–air mixture are the critical reasons for the increased SPN10.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
China 6 vehicles, Exhaust gas recirculation (EGR), GPF, SPN10
in
Environment International
volume
181
article number
108306
publisher
Elsevier
external identifiers
  • pmid:37939440
  • scopus:85176102024
ISSN
0160-4120
DOI
10.1016/j.envint.2023.108306
language
English
LU publication?
yes
id
c66d04ba-1f3f-4fb3-9a67-e49a214f914a
date added to LUP
2023-11-24 11:54:55
date last changed
2024-04-21 14:48:13
@article{c66d04ba-1f3f-4fb3-9a67-e49a214f914a,
  abstract     = {{<p>Particles larger than 10 nm from engine exhaust are gaining global concerns. In light of this, to investigate how EGR affects gasoline vehicle SPN10 (solid particles larger than 10 nm) emissions, seven gasoline vehicles (hybrid or conventional) were studied experimentally. The results revealed that EGR vehicles risk failing the current limit (6 * 10<sup>11</sup> #/km) more than those without EGR if the cut-off size was tightened from 23 nm to 10 nm. More specifically, during the WLTC test, EGR increased the SPN10 emission factors by 2 ∼ 3 times depending on vehicle powertrains (conventional or hybrid). Notably, SPN10 emissions increased significantly when EGR was actively engaged but showed a decrease when the EGR rate remained constant. EGR and the enriched fuel–air mixture are the critical reasons for the increased SPN10.</p>}},
  author       = {{Wang, Yachao and Su, Sheng and Lai, Yitu and Luo, Wanyou and Hou, Pan and Lyu, Tao and Ge, Yunshan}},
  issn         = {{0160-4120}},
  keywords     = {{China 6 vehicles; Exhaust gas recirculation (EGR); GPF; SPN10}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Environment International}},
  title        = {{China 6 EGR gasoline vehicles without a GPF may struggle to meet the potential SPN10 limit}},
  url          = {{http://dx.doi.org/10.1016/j.envint.2023.108306}},
  doi          = {{10.1016/j.envint.2023.108306}},
  volume       = {{181}},
  year         = {{2023}},
}