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:
Jun. 01, 2010
Filed:
Dec. 08, 2006
Naoya Ishikawa, Kanagawa, JP;
Naoya Ishikawa, Kanagawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
An engine control method and an engine control system that can inhibit the emission of NOx and reduce noise are provided. An engine control method in which an engineis caused to perform diffusion combustion at normal times and switched from diffusion combustion to premixed combustion when an engine load is low, wherein when the engineis switched from the diffusion combustion to the premixed combustion, an oxygen concentration in an intake air of the engineis found and when the found oxygen concentration exceeds a threshold of NOx generation oxygen concentration that has been set in advance, switching from the diffusion combustion to a fuel injection mode of the premixed combustion is stopped, and when the found oxygen concentration then becomes equal to or less than the threshold of NOx generation oxygen concentration, switching is performed to the premixed combustion.