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:
Feb. 17, 2004
Filed:
Aug. 09, 2002
Hyun-Jin Shin, Seoul, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
The present invention relates to a method and system for preventing reverse rotation operation of an engine using a system that includes a crank angle sensor (CAS), a cam position sensor (CPS), and an engine control unit for receiving signals from the CAS and the CPS to perform engine control. The method includes determining if a piston in a specific cylinder is at a predetermined location using a level of a CPS signal at a leading edge and a trailing edge of a CAS signal; determining if the engine is rotating in reverse using the CPS signal level at the leading edge and trailing edge of the CAS signal in the case where it is determined that the piston of the specific cylinder is at the predetermined location; and discontinuing operation of the engine if it is determined that the engine is undergoing reverse rotation.