Numerical Study of a Turbocharged, Jet Ignited, Cryogenic, Port Injected, Hydrogen Engine
Date Published: 2009-04-20
Paper Number:2009-01-1425
DOI: 10.4271/2009-01-1425
Citation:
Boretti, A. and Watson, H., "Numerical Study of a Turbocharged, Jet Ignited, Cryogenic, Port Injected, Hydrogen Engine," SAE Technical Paper 2009-01-1425, 2009, doi:10.4271/2009-01-1425.
Favorable and unfavorable properties of hydrogen as a combustion engine fuel have been accommodated in a design of a fuel efficient and clean engine providing similar to gasoline maximum torque and power. The advanced H
2
ICE being developed is a turbocharged engine fitted with cryogenic port hydrogen fuel injection and the hydrogen assisted jet ignition (HAJI). The combustion chamber is designed to produce a high compression ratio and therefore high thermal efficiency. A waste gated turbocharger provides pressure boosting for an increased power density running ultra lean for SULEV operation without after treatment. Thanks to the combustion properties of hydrogen further enhanced by the HAJI system, the engine load is mainly controlled throttle-less decreasing the fuel-to-air equivalence ratio from ultra lean ϕ=0.43 to ultra-ultra lean ϕ=0.18. The computational model developed for addressing the major design issues and the predicted engine performance and efficiency maps are included.
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