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:
Jan. 10, 1989
Filed:
Feb. 03, 1987
Toyohei Nakajima, Wako, JP;
Yasushi Okada, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An air/fuel ratio control system for an internal combustion engine includes an oxygen concentration sensor for producing an output signal to indicate the concentration of oxygen in the engine exhaust gases, and a circuit for producing a discrimination signal which expresses the inherent error, due to manufacturing deviations, in the output signal of the oxygen concentration sensor. Compensation of the output signal from the oxygen concentration sensor is performed in accordance with the discrimination signal, to produce a compensated output signal which controls means for adjusting the air/fuel ratio of the mixture supplied to the engine. Accurate control of the air/fuel ratio is thereby achieved, irrespective of differences in the operating characteristics of oxygen concentration sensors due to manufacturing deviations.