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:
Apr. 05, 2005
Filed:
Oct. 31, 2003
Yuji Yasui, Wako, JP;
Yosuke Ishikawa, Wako, JP;
Takahide Mizuno, Wako, JP;
Michihiko Matsumoto, Tokyo, JP;
Yuji Yasui, Wako, JP;
Yosuke Ishikawa, Wako, JP;
Takahide Mizuno, Wako, JP;
Michihiko Matsumoto, Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A method and an apparatus for estimating an amount of drawn air of a cylinder and a method and an apparatus for controlling the amount of drawn air, are presented. An estimated value of an amount of drawn air of the cylinder, based on intake manifold pressure, is multiplied by a value of an identification parameter obtained by an adaptive observer, to obtain a final estimated value of an amount of drawn air of the cylinder. An accurate estimated value in a transient state as well as an estimated value not oscillating in a steady state can be obtained. Accordingly, accuracy of air-fuel ratio control can be remarkably increased.