Accumulation Mechanism of Gasoline EGR Deposit

Paper #:
  • 2017-01-0806

Published:
  • 2017-03-28
Abstract:
Exhaust Gas Recirculation (EGR) system reduces exhaust emissions and improves fuel efficiency. Recently, the number of EGR system installed vehicles has been increasing, especially, for gasoline engine system. One of the major issues which decrease EGR function is a deposit accumulation on a gas passage. The deposit consists mainly of hydrocarbons which are degradation products of fuel thus the amount of deposit seems to be strongly affected by fuel compositions. However, there is less previous study on the EGR deposit with gasoline fuel but diesel fuel.In this study, influence of gasoline fuel compositions, especially, aromatics which was one of major component of EGR gas, and chemical structures on the deposit accumulation was investigated. To clarify the accumulation mechanism of EGR deposit, a thermal oxidative degradation test with an autoclave unit and an actual gasoline engine test were employed. Different composition fuels in control of carbon number of the aromatic were prepared as test fuels.The result of the thermal oxidative degradation test showed that the higher carbon number of the aromatics in a fuel increases the accumulation of deposit. And the result of the engine test indicated that the test fuel, containing higher amount of C10 and C10< aromatics, caused higher accumulation rate of deposit. These results suggested that the accumulation of EGR deposit was affected carbon number of the aromatic.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Select
Price
List
Download
$22.00
Mail
$22.00
Members save up to 36% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2003-10-27
Standard
2011-12-20
Technical Paper / Journal Article
2004-01-16
Article
2016-03-04
Article
2016-03-01
Training / Education
1999-09-27