NOx Formation in Diesel Engines for Various Fuels and Intake Gases

950213

02/01/1995

Event
International Congress & Exposition
Authors Abstract
Content
The NO formation is essentially determined by the flame temperature. In an engine the latter depends on the composition of the fuel and the intake gas. In this study the efficiency of various NO reducing measures is analysed by means of a comparison of measurements and computations for the Most frequent operation point of a 1.9 1 DI Diesel engine.
The O2 concentration, which is shown to be the dominant source of influence on the flame temperature and NO formation, is varied using synthetic gas mixtures or by EGR. The molar heat capacity of CO2 and H2O in the recirculated exhaust gas, the intake temperature and the H/C ratio in the fuel are less important for the formation of NO. Measures which reduce the NO formation increase the ignition delay and thereby the fraction of the premixed combustion. The impact of EGR on the combustion process is illustrated by high speed filming.
Meta TagsDetails
DOI
https://doi.org/10.4271/950213
Pages
10
Citation
Röpke, S., Schweimer, G., and Strauss, T., "NOx Formation in Diesel Engines for Various Fuels and Intake Gases," SAE Technical Paper 950213, 1995, https://doi.org/10.4271/950213.
Additional Details
Publisher
Published
Feb 1, 1995
Product Code
950213
Content Type
Technical Paper
Language
English