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Fuel Injection System for Opposed-Piston Gasoline Compression-Ignited (OP-GCI) Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
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Opposed-piston engines have been in production since before the 1930’s because of their inherent low heat losses and high thermal efficiency. Now, opposed-piston gasoline compression ignition (OP-GCI) engines are being developed for automotive transportation with stringent emissions targets. Due to the opposed-piston architecture and the absence of a cylinder head, fuel injection requirements and packaging are significantly different than conventional 4-stroke engines with central-mounted injectors. The injection process and spray characteristics are fundamental to achieving a successful combustion system with high efficiency, low emissions, and low combustion noise.
In this paper, the fuel injection system for the Achates 2.7L, 3-cylinder OP-GCI engine is described. The fuel system was designed for 1800 bar maximum fuel pressure with two injectors mounted diametrically opposed in each cylinder. Two fuel rails were mounted on each side of the engine and were supplied independently from two crank-driven unit pumps mounted at the front of the engine. CFD tools were used to investigate nozzle design and spray characteristics for minimal wall wetting and good air utilization. Simulation results indicated that relatively narrow spray angles of 10 to 30 degrees performed well. The fuel system was designed and built at Delphi Technologies and successfully tested on a dynamometer engine at Achates Power.
- Kevin Hoyer - Delphi Technologies Inc.
- Jean Herve Petot - Delphi Technologies Inc.
- Erol Kahraman - Delphi Technologies Inc.
- Guillaume Meissonnier - Delphi Technologies Inc.
- Mark Sellnau - formerly Delphi Technologies Inc.
- Rodrigo Zermeno - Achates Power Inc.
- Donovan Quimby - Achates Power Inc.
- Clark Klyza - Achates Power Inc.
- Fabien Redon - Achates Power Inc.
CitationSellnau, M., Hoyer, K., Petot, J., Kahraman, E. et al., "Fuel Injection System for Opposed-Piston Gasoline Compression-Ignited (OP-GCI) Engines," SAE Technical Paper 2019-01-0287, 2019, https://doi.org/10.4271/2019-01-0287.
Data Sets - Support Documents
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