Exhaust emissions from motor vehicles in low ambient temperature conditions

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3 Citations (Scopus)

Abstract

This paper presents cold–start emissions results for cars representing typical present–day emission control technology for the former European ERA countries (i.e. Sweden, Finland, Norway, Austria and Switzerland). For most of the cars, this means a three–way catalytic converter with closed–loop air–fuel ratio control and multi–point fuel injection system. The ambient temperature during the test was 0°C, and the first phase (505 seconds) of the FTP75 driving cycle was used to assess the performance. Our test results indicate, that, even if any TWC vehicle with state–of–the–art technology has quite low emissions levels, when its performance is evaluated using the standardized certification and type approval procedures, it produces substantially higher emissions levels, especially carbon monoxide and unburned hydrocarbons when the ambient temperature falls below the temperature range determined in the emission regulations. The technology available to lower the adverse effects of cold–starts to emissions is also discussed.

Original languageEnglish
Pages (from-to)280 - 292
Number of pages13
JournalInternational Journal of Vehicle Design
Volume18
Issue number3 - 4
DOIs
Publication statusPublished - 1997
MoE publication typeA1 Journal article-refereed

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Railroad cars
Catalytic converters
Emission control
Fuel injection
Carbon monoxide
Temperature
Hydrocarbons

Cite this

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title = "Exhaust emissions from motor vehicles in low ambient temperature conditions",
abstract = "This paper presents cold–start emissions results for cars representing typical present–day emission control technology for the former European ERA countries (i.e. Sweden, Finland, Norway, Austria and Switzerland). For most of the cars, this means a three–way catalytic converter with closed–loop air–fuel ratio control and multi–point fuel injection system. The ambient temperature during the test was 0°C, and the first phase (505 seconds) of the FTP75 driving cycle was used to assess the performance. Our test results indicate, that, even if any TWC vehicle with state–of–the–art technology has quite low emissions levels, when its performance is evaluated using the standardized certification and type approval procedures, it produces substantially higher emissions levels, especially carbon monoxide and unburned hydrocarbons when the ambient temperature falls below the temperature range determined in the emission regulations. The technology available to lower the adverse effects of cold–starts to emissions is also discussed.",
author = "Juhani Laurikko",
year = "1997",
doi = "10.1504/IJVD.1997.062054",
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}

Exhaust emissions from motor vehicles in low ambient temperature conditions. / Laurikko, Juhani.

In: International Journal of Vehicle Design, Vol. 18, No. 3 - 4, 1997, p. 280 - 292.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Exhaust emissions from motor vehicles in low ambient temperature conditions

AU - Laurikko, Juhani

PY - 1997

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AB - This paper presents cold–start emissions results for cars representing typical present–day emission control technology for the former European ERA countries (i.e. Sweden, Finland, Norway, Austria and Switzerland). For most of the cars, this means a three–way catalytic converter with closed–loop air–fuel ratio control and multi–point fuel injection system. The ambient temperature during the test was 0°C, and the first phase (505 seconds) of the FTP75 driving cycle was used to assess the performance. Our test results indicate, that, even if any TWC vehicle with state–of–the–art technology has quite low emissions levels, when its performance is evaluated using the standardized certification and type approval procedures, it produces substantially higher emissions levels, especially carbon monoxide and unburned hydrocarbons when the ambient temperature falls below the temperature range determined in the emission regulations. The technology available to lower the adverse effects of cold–starts to emissions is also discussed.

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