Knock Suppression in a Turbocharged SI Engine by Using Cooled EGR

Paper #:
  • 982476

Published:
  • 1998-10-19
Citation:
Grandin, B., Ångström, H., Stålhammar, P., and Olofsson, E., "Knock Suppression in a Turbocharged SI Engine by Using Cooled EGR," SAE Technical Paper 982476, 1998, https://doi.org/10.4271/982476.
Pages:
11
Abstract:
The work presented in this paper addresses the effects on combustion of recycling cooled exhaust gas (EGR) to the inlet charge of a standard production, four cylinder 2.3 l turbocharged, SI engine. The effect of various amounts of EGR at different temperatures and ignition timings were investigated. Considerable knock suppression at power output comparable with what was achieved with fuel enrichment, could be achieved by adding cooled EGR.Due to inherent high thermal loads, turbocharged engines have been operated at rich air/fuel-ratios during high load conditions, with subsequent high tailpipe emissions of CO in particular, but also HC. By substituting fuel enrichment with cooled EGR, a stoichiometric charge can be used, thus enabling the use of a three way catalytic converter at all operating conditions.
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

Article
2017-03-13
Technical Paper / Journal Article
2010-10-25