The Effect of Selective Insulation on the Performance, Combustion, and NO Emissions of a DI Diesel Engine

960505

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
The performance, combustion and NO emission characteristics of a naturally aspirated, DI diesel engine having selected parts of the combustion chamber insulated were investigated experimentally and analytically. In this study two insulation schemes, namely insulation of the piston crown and insulation of the cylinder head, using thin ceramic thermal barrier coatings, are compared with the baseline engine (no coatings). Experiments under different operating conditions of load, speed and injection timing for the baseline engine and the two insulation schemes were conducted. The experimental results showed that insulation of the piston crown is more effective than insulation of the cylinder head in improving the brake specific fuel consumption (BFSC) and NO emission of the engine Compared to the baseline engine, coating the piston crown lowered the NO emission under all operating conditions and consistently improved BSFC at the highest load and highest speed test conditions.
A modified KIVA II code was used to model the engine with and without the selective insulation schemes. The KIVA results were in support of the experimental results and lend insight into the combustion phenomena that produce the observed effects.
Meta TagsDetails
DOI
https://doi.org/10.4271/960505
Pages
14
Citation
Afify, E., and Klett, D., "The Effect of Selective Insulation on the Performance, Combustion, and NO Emissions of a DI Diesel Engine," SAE Technical Paper 960505, 1996, https://doi.org/10.4271/960505.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960505
Content Type
Technical Paper
Language
English