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. 08, 1980
Filed:
Feb. 01, 1978
Applicant:
Inventors:
Hironobu Ono, Toyota, JP;
Minoru Bito, Toyota, JP;
Assignee:
Toyota Judosha Kogyo Kabushiki Kaisha, Aichi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
1231 / ; 123 / ; 1231 / ;
Abstract
Disclosed is a trouble warning device for an air-fuel ratio sensor mounted in an internal combustion engine. The trouble warning device comprises a comparator which compares the output voltage level of the air-fuel ratio sensor with a reference voltage whose level is higher than the output voltage level of the normally operating air-fuel ratio sensor and an indicator to give warning of trouble in response to the compared result. By using this trouble warning device, correct detection of trouble and reliable warning of trouble in the air-fuel ratio sensor can be obtained.