Numerical Prediction of Charge Distribution in a Lean Burn Direct-Injection Spark Ignition Engine Pohang University of Science and Technology

Format:

Conference/Event

Author/Creator:

Miok, Joh, author.

Conference Name:

International Congress & Exposition (1997-02-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

970626

Access Restriction:

Restricted for use by site license