Quantification of the Formaldehyde Emissions from Different HCCI Engines Running on a Range of Fuels

Summary, in English

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.

• Author: Mikael Lemel; Anders Hultqvist; Andreas Vressner; Henrik Nordgren; Håkan Persson; Bengt Johansson
• Department/s: Combustion Engines
• Publishing year: 2005
• Language: English
• Pages: 1347-1357
• Publication/Series: SAE Transactions, Journal of Fuels and Lubricants
• Volume: 114
• Issue: 4
• Full text: - 244 kB; Download statistics
• Links: http://www.sae.org/technical/papers/2005-01-3724; http://www.ingentaconnect.com/search/article?author=lemel%2C+m&year_from=2002&year_to=2007&database=0&pageSize=20&index=1
• Document type: Journal article
• Publisher: Society of Automotive Engineers
• Topic: Other Mechanical Engineering
• Keywords: Fuel Effects; FTIR; Formaldehyde; Engine; HCCI; Combustion
• Status: Published
• ISBN/ISSN/Other: ISSN: 0096-736X