RESEARCH PAPERS: Internal Combustion Engines

A New Compression Ignition Engine Concept for High Power Density

[+] Author and Article Information
J. M. Clarke, W. G. Berlinger

Caterpillar Inc., Engine Research Department, P. O. Box 1875, Technical Center, Building F, Peoria, IL 61656-1875

J. Eng. Gas Turbines Power 121(2), 211-217 (Apr 01, 1999) (7 pages) doi:10.1115/1.2817107 History: Received August 01, 1996; Revised January 12, 1999; Online December 03, 2007


A new compression ignition (CI) engine concept has been identified which greatly improves power density over conventional CI engines. This paper reviews the scaling laws as they apply to power density (power/crate volume) and derives a parameter reflecting the compactness of any engine design. The new concept is compared to existing engines on the basis of this parameter. Ideal cycle analysis of the multistage thermodynamic processes inherent in the new arrangement leads to the expectation that this engine will be more efficient than current engines. Real cycle simulations and concept design work have confirmed that efficiency can be at least as high as current engines while size is much reduced. Design and analysis are continuing in order to establish that the durability and low emissions will be competitive with modern CI engines.

Copyright © 1999 by The American Society of Mechanical Engineers
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