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:
Dec. 17, 2002
Filed:
Dec. 28, 1999
Hyoung-Jin Yoon, Seongnam, KR;
Jeong-Soo Eo, Seoul, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
Disclosed is a system and method for processing crank angle signals. The system comprises a crank angle sensor for converting a rotation of a crankshaft into analog signals; a switching circuit for converting the analog signals into crank angle signals; a timer/counter for detecting a number of pulses and tooth periods of the crank angle signals; a phase sensor for converting a rotation of a camshaft into cylinder identity signals and outputting the cylinder identity signals; and an electronic control unit for receiving the crank angle signals and the cylinder identity signals and using the signals to determine cylinder identity and rpm. The method comprises the steps of inputting a crank angle signal and a cylinder identity signal; determining if the cylinder identity signal has undergone inversion from a high to low state or vice versa; establishing a point at which the cylinder identity signal undergoes inversion as a reference position; counting a predetermined number of pulses of the crank angle signal after the reference position if the cylinder identity signal does not undergo inversion; and identifying a point at which the predetermined number of the pulses of the crank angle signal is counted as a particular cylinder.