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Quantification of the Formaldehyde Emissions From Different Hcci Engines Running on a Range of Fuels
Lunds Tekniska Högskola, Värme- och kraftteknik.
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2005 (English)In: SAE, Session: Homogeneous Charge Compression Ignition (HCCI) (Part 3 of 6), 2005Conference paper (Refereed)
Abstract [en]

In this paper, the formaldehyde emissions from three different types of homogenous charge compression ignition (HCCI) engines are quantified for a range of fuels by means of Fourier Transform Infra Red (FTIR) spectroscopic analysis. The engines types are differentiated in the way the charge is prepared. The characterized engines are; the conventional port fuel injected one, a type that traps residuals by means of a Negative Valve Overlap (NVO) and finally a Direct Injected (DI) one. Fuels ranging from pure n-heptane to iso-octane via diesel, gasoline, PRF80, methanol and ethanol were characterized. Generally, the amount of formaldehyde found in the exhaust was decreasing with decreasing air/fuel ratio, advanced timing and increasing cycle temperature. It was found that increasing the source of formaldehyde i.e. the ratio of heat released in the cool-flame, brought on higher exhaust contents of formaldehyde. The application of a standard three-way catalyst completely removed formaldehyde from the exhaust stream.

Place, publisher, year, edition, pages
, SAE Technical Papers, 2005-01-3724
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-177586DOI: 10.4271/2005-01-3724ScopusID: 2-s2.0-84877454379OAI: diva2:873457
Powertrain & Fluid Systems Conference & Exhibition, San Antonio, TX, USA.

QC 20151127

Available from: 2015-11-24 Created: 2015-11-24 Last updated: 2015-11-27Bibliographically approved

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Hultqvist, Anders
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