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. 26, 2012
Filed:
Nov. 22, 2007
Yasuhiko Otsubo, Toyota, JP;
Masanobu Katayama, Toyota, JP;
Yasuhiko Otsubo, Toyota, JP;
Masanobu Katayama, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
This device is applied to an internal combustion engine that has a fuel injection valve for injecting fuel directly into the combustion chamber, a supercharger and an exhaust purification device. As a fuel injection from the fuel injection valve, a post-injection is executed separately from the fuel injection for torque generation. The device includes an air amount sensor provided on the intake passageway upstream of the supercharger, and a pressure sensor provided on the intake passageway downstream of the supercharger. A correction term is calculated based on the rate of change of the air pressure detected by the pressure sensor. An upper-limit injection amount is set based on the engine rotation speed, the passageway air amount detected by the air amount sensor, the correction term and a main injection amount. Using the upper-limit injection amount, a target post-injection amount is restricted.