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:
Jul. 10, 1984
Filed:
Jun. 24, 1981
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
An output voltage from an O.sub.2 sensor is intermittently sampled and the sampled voltage is converted into a binary signal. The binary signal is applied to an electrical digital computer, and therein the following operations are carried out. First, the maximum value or the maximum and minimum values of the applied binary signal are detected, then a reference value is calculated using the maximum value or the maximum and minimum values from a predetermined algebraic function. Thereafter, the applied binary signal is compared with the calculated reference value to generate a binary signal indicative of the comparison result. Then, the air-fuel ratio of the engine is adjusted in response to this binary signal calculated by the digital computer.