Patent ID: 6679224
Filing Date: 2004-01-20
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A method for operating a diesel engine under stoichiometric or slightly fuel-rich conditions includes:providing a source of diesel fuel; providing a source of a second fuel that is readily vaporizable in an air intake section of the diesel engine; controllably introducing said readily vaporizable second fuel into said intake manifold system when said engine is operating under one of a stoichiometric and a fuel-rich operating condition, thereby providing a pre-mixed air/fuel mixture comprising air and said readily vaporizable second fuel; introducing said pre-mixed fuel into a combustion chamber of said engine; injecting said diesel fuel through an injection nozzle disposed in the combustion chamber of the diesel engine; and combusting said diesel fuel and said readily vaporizable second pre-mixed air/fuel mixture in said combustion chamber.