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:
May. 24, 2005
Filed:
Dec. 18, 2003
Futoshi Nakano, Fujisawa, JP;
Akira Hirata, Fujisawa, JP;
Koichiro Yomogida, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
A fuel injection control device includes an after treatment device for purifying exhaust gas by the action of a catalyst, an exhaust gas temperature detector for detecting the exhaust gas temperature, and a controller for controlling the fuel injection quantity and fuel injection timing. The controller executes an exhaust gas temperature increase control by post-injection when the exhaust gas temperature detected by exhaust gas temperature detection means is less than the activity temperature of the catalyst in the after treatment device. When executing the exhaust gas temperature increase control, the controller determines the target injection quantity of post-injection based on the difference between the exhaust gas temperature considered as a target and the actual exhaust gas temperature detected by the exhaust gas temperature detector and also determines the upper limit value of injection quantity of post-injection based on the actual exhaust gas temperature detected by the exhaust gas temperature detector, conducts control such that the actual injection quantity of post-injection becomes the upper limit value when the target injection quantity is equal to the upper limit value or higher, and conducts control such that the actual injection quantity of post-injection becomes the target injection quantity when the target injection quantity is less than the upper limit value.