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:
Sep. 12, 1989
Filed:
May. 20, 1988
Applicant:
Inventors:
Dah-Lain Tang, Canton, MI (US);
Marek T Wlodarczyk, Birmingham, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
2502 / ; 2502 / ;
Abstract
A fiber optic detector head senses a light reflective or transmissive pattern on an encoder disk rotated by an engine shaft. The pattern results in three different light levels which are translated by a detector into an electrical pulse train having three different voltages. Patterns encoded into the single pulse train are decoded by a microprocessor to provide specific engine cylinder or cylinder pair position information even within the first spark firing period as well as engine speed information.