Design and Combustion Characteristics of an Ethanol Homogeneous Charge Torch Ignition System for a Single-cylinder Optical Engine

Paper #:
  • 2016-36-0130

Published:
  • 2016-10-25
DOI:
  • 10.4271/2016-36-0130
Abstract:
The trends in the development of spark ignition engines leads to the adoption of lean mixtures in the combustion chamber. Torch ignition systems have potential to reduce simultaneously the NOx and CO emissions, while keeping the fuel conversion efficiency at a high level. This study aims to design and analyze a torch ignition system running with ethanol on lean homogeneous charge, adapted to an Otto cycle single-cylinder engine with optical visualization. The main objective is to achieve combustion stability under lean burn operation and to expand the flammability limit for increasing engine efficiency by means of redesigning the ignition system adapting a pre-chamber to the main combustion chamber. Experiments were conducted at constant speed (1000 rpm) using ethanol (E100) as fuel, for a wide range of injection, ignition and mixture formation parameters. Specific fuel consumption and combustion stability were evaluated at each excess air ratio. Optical visualization illustrated the port fuel spray behavior, torch jet and flame propagation. Engine efficiency achieved an improvement of 4.3% with the torch ignition system.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Standard
2013-03-11
Standard
1968-01-01
Standard
1971-06-01
Standard
1987-08-01
Standard
2014-08-12