The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2004
Filed:
Nov. 06, 2001
Rudolf H. Stanglmaier, San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
A method and apparatus for operating a diesel engine under stoichiometric or slightly fuel-rich conditions, as is often necessary to maintain effective operation of certain post-combustion emission reduction devices, such as Lean NOx Traps, includes a readily vaporizable fuel injection nozzle disposed in the intake manifold system in communication with a combustion chamber of the diesel engine. The readily vaporizable fuel mixes with the intake air and produces a mixture of pre-mixed air and fuel when introduced into the combustion chamber. A diesel fuel, which is directly injected into the combustion chamber through a conventional diesel fuel injection nozzle. Combustion of the pre-mixed air and readily vaporizable fuel, with controlled injected of the diesel fuel, reduces the particulate matter (soot) emissions when operating the engine under the necessary stoichiometric or slightly fuel-rich conditions.