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. 21, 1981
Filed:
Jun. 26, 1979
Kunio Makita, Chiryu, JP;
Masahiro Sato, Toyoake, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
This invention discloses a rotational position detecting apparatus for an internal combustion engine for detecting the rotational position of a crank shaft of the engine. The apparatus comprises a rotating disk driven by the engine and giving a large number of angular information signals and also a rotating disk having one reference information on the periphery thereof, an angle sensor for detecting the angular informations on the disk, a rotational reference sensor for detecting the reference information on the disk, waveform reshaping circuits for reshaping the output signals of said both sensors, and an electric circuit for determining the angular position and the reference position from the outputs of said waveform reshaping circuits, wherein a logical product of the reshaped output of the angle sensor and the reshaped output of the reference sensor is implemented, and the time of either one of the rise or fall of an output signal of the logical product is set to be an angular position, while the other one is set to be a reference position.