Modeling and Validation of Automotive Engines for Control Algorithm Development

[+] Author and Article Information
J. J. Moskwa

University of Wisconsin-Madison, Madison, Wis.

J. K. Hedrick

University of California-Berkeley, Berkeley, CA 94720

J. Dyn. Sys., Meas., Control 114(2), 278-285 (Jun 01, 1992) (8 pages) doi:10.1115/1.2896525 History: Received April 17, 1990; Revised June 25, 1991; Online March 17, 2008


There is considerable interest in coordinated automotive engine/transmission control to smooth shifts, and for traction control of front wheel vehicles. This paper outlines a nonlinear dynamic engine model of a port fuel-injected engine, which can be used for control algorithm development. This engine model predicts the mean engine brake torque as a function of the engine controls (i.e., throttle angle, spark advance, fuel flow rate, and exhaust gas recirculation (E. G. R.) flow rate). The model has been experimentally validated for a specific engine, and includes: • intake manifold dynamics, • fuel delivery dynamics, and • process delays inherent in the four-stroke engine. This model is used in real time within a control algorithm, and for system simulation. Also, it is flexible enough to represent a family of spark ignition automotive engines, given some test and/or simulation data for setting parameters.

Copyright © 1992 by The American Society of Mechanical Engineers
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