This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Bondgraph Modeling and Stability Investigation of a Cummins-Type Unit Injector
Annotation ability available
Sector:
Language:
English
Abstract
Dynamic modeling of a diesel injection system is imperative to identify the forces applied to the system's elements and determine the conditions under which the system will be stable. The results of dynamic modeling are especially important for injection systems with different operating modes.
This work uses a five-degree-of-freedom system to represent a diesel unit injector. The Bondgraph Method was used for formulating the kinematic and dynamic equations. The inputs to the system were the velocity of the cam follower and the pressure force exerted by the fuel on the plunger. The coefficients of the system's characteristic equation were then determined. Routh's criteria were considered to identify the region of stability for the unit injector.
Authors
Citation
Rezeka, S. and Saeed, M., "Bondgraph Modeling and Stability Investigation of a Cummins-Type Unit Injector," SAE Technical Paper 871619, 1987, https://doi.org/10.4271/871619.Also In
References
- Becchi G.A. “Analytical Simulation of the Fuel Injection in Diesel Engines;” SAE Paper No. 710568 1971
- Wylie E. B. Bolt J. A. El-Erian M.F. “Diesel Fuel Injection System Simulation and Experimental Correlation;” SAE Paper No. 710569 1971
- Rosselli A. Badgley P. “Simulation of the Cummins Diesel Injection System;” SAE Paper No. 710570 1971
- El-Erian M.F. Wylie E.B. Bolt J.A. “Analysis and Control of Transient Flow in the Diesel Injection System Part (1): The Analytical Control Method;” SAE Paper No. 730661 1973
- El-Erian M.F. Wylie E.B. Bolt J.A. “Analysis and Control of Transient Flow in the Diesel Injection System Part (2): Design Results of Controlled After-Injection;” SAE Paper No. 730662 1973
- Yamaoka K. “Analysis of by-pass Control Type Fuel Injection System for Small Diesel Engine;” SAE Paper No. 730664 1973
- Hattori H. Hirako Y. “Simulation of Diesel Fuel Injection System;” Bulletin of the University of Osaka June 1975
- Matsuoka S. Katsukiko K. Kamimoto T. Igoshi M. “Study of Fuel Injection System in Diesel Engines,” SAE Paper No. 760551 1976
- Scullen R. S. Hames R. J. “Computer Simulation of the GM Unit Injector;” SAE Paper No. 780161 1978
- Goyal M. “Modular Approach to Fuel Injection System Simulation;” SAE Paper No. 780162 1978
- Sharma R.P. Singh T. “Dynamics of the Ford PROCO Fuel Injection System;” Proc. of the Midwest Mech. Conf. 16th Kansas State University Manhattan, Kansas September 19-21 1979
- Dweib A. H. “Transient Fluid Flow (A study of Diesel Fuel Injection System);” M.Sc. Thesis Alexandria University 1980
- Toboldt B. “Diesel-Fundamentals, Service, Repair;” The Goodheart-Willcox Company, Inc. South Holland, Illinois 1980
- Brady R. N. “Diesel Fuel Systems;” Reston Publishing Company, Inc. Reston, Virginia 1981
- Chen F. Y. “Mechanics and Design of Cam Mechanisms” Pergamon Press Inc. New York 1982
- Hames R.J. Straub R.D. Amann R. W. “DDEC-Detroit Diesel Electronic Control;” SAE Paper No. 850542 1985
- Glikin P. E. “Fuel Injection in Diesel Engines;” Proc. IMechE 199 3 1985 161 176
- Kawazoe Y. “Low Speed Hunting of the Pneumatically Governed Compression-Ignition Engine ( 1st Report, Various Experiments for Identifying the Cause)” Bulletin of JSME 28 243 September 1985 2022 27
- Kawazoe Y. “Low Speed Hunting of Pneumatically Governed Compression-Ignition Engine ( 2nd Report, Stability Criticism of the Closed Engine-Governor Loop Based on Measured Frequency Responses of the Two Open Systems Composing the Loop)” Bulletin of JSME 28 244 October 1985 2365 69
- Kawazoe Y. “Dynamics and Equivalent Damping of the Fuel Control System of the Pneumatically Governed Compression-Ignition Engine;” Bulletin of JSME 29 248 February 1986 501 507
- Ogata K. “Modern Control Engineering;” Prentice-Hall, Inc. Englewood Cliffs, N.J. 1970