Polycyclic Aromatic Hydrocarbons from a Gasoline Direct Injection Engine During Start

doi:10.7652/xjtuxb201709008

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Polycyclic Aromatic Hydrocarbons from a Gasoline Direct Injection Engine During Start

更新时间：2025-07-09

- Polycyclic Aromatic Hydrocarbons from a Gasoline Direct Injection Engine During Start
- Vol. 51, Issue 9, Pages: 54-62(2017)
- 作者机构：
  
  1. 吉林大学汽车仿真与控制国家重点实验室,长春,130025
  2. 吉林大学汽车工程学院,长春,130025
  3. 一汽铸造有限公司,长春,130062
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201709008
  CLC： TK411+.5
- Online First：10 September 2017，
  
  Published：2017
- 稿件说明：
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Polycyclic Aromatic Hydrocarbons from a Gasoline Direct Injection Engine During Start[J]. 2017, 51(9): 54-62.
DOI：

Polycyclic Aromatic Hydrocarbons from a Gasoline Direct Injection Engine During Start[J]. 2017, 51(9): 54-62. DOI： 10.7652/xjtuxb201709008.

摘要

通过采用3种含氧燃料:汽油、添加体积分数为10%乙醇的乙醇汽油燃料(E10)、添加体积分数为15%甲醇的甲醇汽油燃料(M15)

对直喷汽油机起动过程的多环芳烃(PAHs)排放采用索式萃取法萃取后

再利用气相色谱-质谱联用仪进行了分析。结果表明

E10燃料在水温为20 ℃时冷起动和水温为80 ℃时热起动所排放的PAHs较纯汽油分别降低了39.03%和23.78%

M15燃料在水温为20 ℃时冷起动和水温为80 ℃时热起动所排放的PAHs较纯汽油分别降低了30.17%和66.06%。不同水温下由起动过程排放的PAHs毒性分析得出:水温为20 ℃冷起动时

E10、M15燃料排放的PAHs总苯并(a)芘毒性等效值较纯汽油分别降低了23.25%和21.47%; 水温为80 ℃热起动时

E10、M15燃料排放的PAHs总苯并(a)芘毒性等效值较纯汽油分别降低了33.26%和50.46%

纯汽油、E10、M15这3种燃料在水温为80 ℃时热起动较20 ℃时冷起动分别降低了44.25%、50.80%和64.84%。

Abstract

Polycyclic aromatic hydrocarbons(PAHs)emitted from a gasoline direct injection(GDI)engine during start were extracted via Soxhlet extraction system and analyzed by GS-MS. Three kinds of fuel

gasoline

gasoline blended with 10% volume fraction ethanol(E10)

and gasoline blended with 15% volume fraction methanol(M15)

were considered. The results show that compared with gasoline

PAHs mass concentration of the exhaust extraction from the engine fueled with E10 decreases by 39.03% and 23.78% under 20 ℃ and 80 ℃ coolant start conditions

respectively; PAHs mass concentration from the engine fueled with M15 decreases by 30.17% and 66.06%

respectively. Toxicity of PAHs was assessed under different coolant's temperature start conditions. Under 20 ℃ coolant start condition

benzo(a)pyrene equivalent toxicity values of PAHs from the engine fueled with E10 and M10 decrease by 23.25% and 21.47% compared with gasoline; under 80 ℃ coolant start condition

benzo(a)pyrene equivalent toxicity values of PAHs from the engine fueled with E10 and M10 decrease by 33.26% and 50.46% compared with gasoline. In contrast to 20 ℃ coolant start condition

benzo(a)pyrene equivalent toxicity values of PAHs from the engine fueled with gasoline

E10 and M15 decrease the values by 44.25%

50.80% and 64.84% respectively under 80 ℃ coolant start condition.

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