Numerical Prediction of Charge Distribution in a Lean Burn Direct-Injection Spark Ignition Engine

Paper #:
  • 970626

Published:
  • 1997-02-24
Citation:
Miok, J., Huh, K., Noh, S., and Choi, K., "Numerical Prediction of Charge Distribution in a Lean Burn Direct-Injection Spark Ignition Engine," SAE Technical Paper 970626, 1997, https://doi.org/10.4271/970626.
Pages:
20
Abstract:
Three-dimensional computation of the flow field and fuel spray in a DISC engine is performed using a modified version of KIVA-II. A special valve treatment technique is employed to simulate multiple moving valves without excessive efforts for body-fitted grid generation. The test engine is a 4-valve 4-stroke gasoline engine with a pent-roof head and a hollow-cone spray by a high-pressure swirl injector. The injection strategy is divided into two categories, ‘early’ and ‘late’ injection to optimize the combustion process. A spray-wall impingement model based on a single droplet experiment is implemented to consider both ‘early’ and ‘late’ injection case. Parametric studies are performed with respect to the load, injection timing, duration and position, spark-plug position, and the combustion chamber geometry. Results show that the current numerical analysis is capable of representing the spray motion and mixture formation in an operating engine qualitatively. Further studies and comparisons with experimental results such as in-cylinder behavior of fuel sprays are needed to make a more reliable prediction.
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

Technical Paper / Journal Article
2010-10-25
Training / Education
2018-03-26
Training / Education
1999-09-27
Article
2017-03-13