A CFD Study of Squeeze Film

In a new generation of unit injector (HEUI-Hydraulically Actuated and Electronically Controlled), a thin gap of oil film exists between the armature and solenoid. At low temperatures, high pressure slows the poppet causing poor injector performance. A CFD(Computational Fluid Dynamics) study with mov...

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Bibliographic Details
Published in:	SAE transactions Vol. 103; pp. 36 - 46
Main Authors:	Kumar, Kurichi, Desai, Chetan, Flinn, Mike
Format:	Journal Article
Language:	English
Published:	Society of Automotive Engineers, Inc 01-01-1994
Subjects:	Air pressure Armatures Flow distribution Inertia Kinetics Lubrication Pressure distribution Solenoids Squeeze films Velocity
Online Access:	Get full text
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Summary:	In a new generation of unit injector (HEUI-Hydraulically Actuated and Electronically Controlled), a thin gap of oil film exists between the armature and solenoid. At low temperatures, high pressure slows the poppet causing poor injector performance. A CFD(Computational Fluid Dynamics) study with moving boundaries/meshes was undertaken to evaluate squeeze film behavior and determine optimum venting arrangement for improved injector performance.
ISSN:	0096-736X 2577-1531