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:
Aug. 09, 1977
Filed:
Sep. 29, 1976
Yasumasa Matsuda, Hitachi, JA;
Ichiro Kimura, Mito, JA;
Akio Sagawa, Hitachi, JA;
Tsutomu Hiramatsu, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
An apparatus for detecting misfire in a multicylinder internal combustion engine, comprising a sound pick-up transducer disposed in the exhaust passage of the engine or a chamber communicating with the exhaust passage for the purpose of detecting exhaust sound, an integrating circuit for integrating an electric output of the transducer in synchronism with the rotation of the engine and a comparison circuit for comparing the output of the integrating circuit with a reference signal, thereby misfire being detected on the basis of an output of the comparison circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile