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. 08, 2014
Filed:
May. 16, 2011
Michinori Tani, Wako, JP;
Atsuhiro Miyauchi, Wako, JP;
Kenichi Maeda, Wako, JP;
Seiji Watanabe, Wako, JP;
Soichiro Goto, Wako, JP;
Michinori Tani, Wako, JP;
Atsuhiro Miyauchi, Wako, JP;
Kenichi Maeda, Wako, JP;
Seiji Watanabe, Wako, JP;
Soichiro Goto, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An air-fuel ratio control apparatus for an internal-combustion engine includes an air-fuel-ratio sensor, a control-input calculator, an air-fuel-ratio controller, and a gain calculator. The air-fuel-ratio sensor is disposed in an exhaust channel in the internal-combustion engine and is configured to detect an air-fuel ratio in exhaust gas. The control-input calculator is configured to calculate a control input in accordance with an output value of the air-fuel-ratio sensor. The air-fuel-ratio controller is configured to perform a feedback control using the control input such that the output value of the air-fuel-ratio sensor reaches a target value. The gain calculator is configured to calculate a gain in accordance with the output value when the output value is leaner than the target value. The gain is to be used in calculating the control input.