Numerical Modeling of a Jet Ignition Direct Injection (JI DI) LPG Engine

Albert Boretti

Authors

Albert Boretti West Virginia University

Keywords:

internal combustion engines, direct injection, jet ignition

Abstract

The paper presents indirectly validated simulations of the operation of a LPG engine fitted with Direct Injection (DI) and Jet Ignition (JI). It is demonstrated that the engine may have diesel like efficiencies and load control by quantity of fuel injected. As the liquid propane quickly evaporates after injection in the main chamber, the main chamber mixture may be much closer to stoichiometry than a diesel for a better specific power at low engine speeds. This design also works at the high engine speeds impossible for the diesel, as combustion within the main chamber is controlled by the turbulent mixing rather than the vaporization and diffusion processes of the injected fuel of the diesel.

Author Biography

Albert Boretti, West Virginia University

20 yearsd FIAT Research 10 years academy (Australia, US, GCC)

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