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Air/Fuel Distribution Simulation in a Port Injected Gasoline Lean-burn Engine
Technical Paper
2001-01-1230
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
In this paper, both numerical and experimental results of in-cylinder mixture distribution are presented, and predictions agree with measured data very well. With the simulation technique described herein, mixture ignitability in a port injection gasoline lean-burn engine can be satisfactorily evaluated based on predicted in-cylinder mixture stratification. The validation of the simulation technique can be divided into three stages. First, calculation results of in-cylinder flows are compared with measured data from Particle Image Velocimetry (PIV) measurements. Second, the accuracy of spray calculations is verified by comparing with spray measurements inside an atmospheric pressure bomb. Finally, the validated simulation technique is used to model engine intake and compression strokes with fuel injection. As a result, predicted results of mixture distribution immediately prior to ignition show a good tendency to match fuel vapor concentration distribution measured by Laser Induced Fluorescence (LIF) in an optically-accessed engine. Then, the validated simulation technique is further utilized to analyze mixture stratification mechanisms due to injection timing variations and intake port shapes. A good correlation is found between the predicted in-cylinder mixture distribution and the variation coefficient (co-variance) of indicated mean effective pressure (IMEP) obtained from engine test.
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Citation
Ishikawa, N., Hiraide, A., and Takabayashi, T., "Air/Fuel Distribution Simulation in a Port Injected Gasoline Lean-burn Engine," SAE Technical Paper 2001-01-1230, 2001, https://doi.org/10.4271/2001-01-1230.Also In
References
- Yi Jianwen Han Zhiyu Yang Jialian Anderson Richard Trigui Nizar Boussarsar Riadh “Modeling of the Interaction of Intake Flow and Fuel Spray in DISI Engine” SAE Paper 2000-01-0656 2000
- Hardalupas Y. Taylor A.M.K.P. Whitelaw J.H. Ishii K. Miyano H. Urata Y. “Influence of Injection Timing on In-Cylinder Fuel Distribution in a Honda VTEC-E Engine” SAE Paper 950507 1995
- Ricater M. Axelsson B. Alden M. Josefsson G. Carlsson LO. Dahlberg M. Nisbet J. Simonsen H. “Investigation of the Fuel Distribution and the In-Cylinder Flow Field in a Stratified Charge Engine Using Laser Techniques and Comparison with CFD-Modeling” SAE Paper 1999-01-3540 1999
- O'Connor J.F. McKinley N.R. “CFD Simulation of Intake Port Flow Using Automatic Mesh Generation: Comparison With Laser Sheet, Swirl and LDA Measurements for Steady Flow Conditions” SAE Paper 980129 1998
- Ricardo Consulting Engineers Ltd “VECTIS-Computational Fluid Dynamics. Release 3.3,Users Guide” 1999