Patent ID: 6784658
Filing Date: 2004-08-31
Classification: F02D,G01D,G01P

Abstract:
A signal generator for a multi-cylinder internal combustion engine, used for detecting rotation information of the multi-cylinder internal combustion engine having two or more cylinders, comprising:a rotor in the form of an inductor having a first series of reluctors as many as cylinders of said internal combustion engine, that are provided correspondingly to each cylinder of said internal combustion engine and are rotated together with a crankshaft around a central axis of said crankshaft of said internal combustion engine, and a second series of at least one reluctor that is provided in a position shifted axially along said crankshaft relative to said first series of reluctors and is rotated together with said first series of reluctors; a first sensor that detects a leading edge and a trailing edge in a rotational direction of said first series of reluctors of said rotor to generate a leading edge detection pulse and a trailing edge detection pulse having different polarities; and a second sensor that detects a leading edge and a trailing edge in a rotational direction of the second series of reluctor of said rotor to generate a leading edge detection pulse and a trailing edge detection pulse having different polarities, wherein polar arc angles of said first and said second series of reluctors, a positional relationship between said first and said second sensors, and a positional relationship between said first and said second series of reluctors are set so that said second sensor detects the leading edge or the trailing edge of the second series of one reluctor to generate one pulse while said first sensor sequentially detects at least one leading edge and at least one trailing edge of said first series of reluctors to generate the leading edge detection pulse and the trailing edge detection pulse.