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:
Jul. 30, 2013
Filed:
Jul. 16, 2009
Yoshihiro Okada, Susono, JP;
Yoshihiro Okada, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A control unit for a turbocharged internal combustion engine is provided. The control unit includes a first exhaust valve that opens/closes a first exhaust passage that is communicated with a turbine; a second exhaust valve that opens/closes a second exhaust passage that bypasses the turbine; and a closing timing of the second exhaust valve that is controlled so that an opening period of the second exhaust valve overlaps with an opening period of an intake valve under high engine load. The opening characteristic of the second exhaust valve and a fuel injection amount are controlled so that the air-fuel ratio of gas that is filled in a cylinder approximates an output air-fuel ratio and the air-fuel ratio of gas flowing into a three-way catalyst that is arranged in a post-junction exhaust passage approximates a theoretical air-fuel ratio under high engine load.