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. 10, 2011
Filed:
Aug. 13, 2009
Applicants:
Kazuchika Tashima, Toyota, JP;
Masahiko Teraoka, Toyota, JP;
Tomohiro Fujita, Toyota, JP;
Inventors:
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
When it is detected in a fuel supply device for a flexible-fuel internal combustion engine that a refueling operation has been performed for a fuel tank, a return suppression process in which fuel in a delivery pipe is prohibited from returning to the fuel tank through a high-pressure return passage is executed until a concentration learning process is started. After the concentration learning process is started, a compulsory return process in which fuel in the delivery pipe is compulsorily returned to the fuel tank through the high-pressure return passage is executed.