Research Papers: Fuel Combustion

Experimental Comparison of Gasoline Compression Ignition and Diesel Combustion in a Medium-Duty Opposed-Piston Engine

[+] Author and Article Information
Reed Hanson

Achates Power,
San Diego, CA 92121
e-mail: hanson@achatespower.com

Ashwin Salvi

Achates Power,
San Diego, CA 92121
e-mail: salvi@achatespower.com

Fabien Redon

Achates Power,
San Diego, CA 92121
e-mail: redon@achatespower.com

Gerhard Regner

Achates Power,
San Diego, CA 92121
e-mail: regner@achatespower.com

Contributed by the Internal Combustion Engine Division of ASME for publication in the Journal of Energy Resources Technology. Manuscript received May 15, 2019; final manuscript received May 16, 2019; published online June 5, 2019. Assoc. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 141(12), 122201 (Jun 05, 2019) (6 pages) Paper No: JERT-19-1293; doi: 10.1115/1.4043825 History: Received May 15, 2019; Accepted May 16, 2019

The Achates Power Inc. (API) opposed-piston (OP) engine architecture provides fundamental advantages that increase thermal efficiency over current poppet valve 4 stroke engines. In this paper, the combustion performance of diesel and gasoline compression ignition (GCI) combustion in a medium-duty, OP engine are shown. By using GCI, NOx and/or soot reductions can be seen compared with diesel combustion at similar or increased thermal efficiencies. The results also show that high combustion efficiency can be achieved with GCI combustion with acceptable noise and stability over the same load range as diesel combustion in an OP engine.

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Grahic Jump Location
Fig. 1

GCI and diesel SCE test points

Grahic Jump Location
Fig. 2

GCI cylinder pressure traces

Grahic Jump Location
Fig. 4

Diesel cylinder pressure traces

Grahic Jump Location
Fig. 10

Indicated thermal efficiency

Grahic Jump Location
Fig. 15

Combustion efficiency



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