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:
Aug. 13, 1996
Filed:
Mar. 30, 1995
Applicant:
Inventor:
Shuji Yuda, Susono, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D / ; F02M / ;
U.S. Cl.
CPC ...
123674 ;
Abstract
Fuel-vapor evaporating from a fuel tank 13 is led through a vapor pipe 133 and absorbed in a charcoal canister 14. When a large amount of fuel is trapped in the charcoal canister, the learning of the basic air-fuel ratio correction factor executed in the control system 15 is interrupted in order to avoid faulty learning and the purging of fuel from the charcoal canister to the engine is continued in order to ensure sufficient fuel-purging. Only when a small amount of fuel is trapped in the charcoal canister, and the engine is driving in the region where the basic air-fuel ratio correction factor has not been learned, its learning is executed.