G - Physics – 01 – M
Patent
G - Physics
01
M
340/135.8
G01M 15/00 (2006.01) F02P 7/067 (2006.01) F02P 7/077 (2006.01) G01D 5/245 (2006.01) G01M 15/06 (2006.01) G01P 3/46 (2006.01)
Patent
CA 1287899
Abstract An annular permanent magnet rotor (8) is mounted around and fixed to a crankshaft (4) of an internal combustion engine (2) and has a plurality of circumferentially spaced magnetic poles (14) of sequentially alternating north-south polarity type, and a pole (18) reversed out of the alternating sequence. A first fixed stator (24) is provided by an annular ring concentric to the rotor (8) and has a plurality of poles (26) for magnetic flux coupling with the permanent magnet rotor poles (14). A second fixed stator (48) is axially spaced from the first stator (24) and has a pair of poles (50, 52) for magnetic flux coupling with the rotor (8). A first sensor coil (40) around the first stator (24) outputs a timing angle signal. Processing circuitry produces a series of digital pulses having ANGLE-defining edges occurring at fixed angular increments of crankshaft rotation. A second sensor coil (56) around the second stator (48) outputs an advance warning signal that a specific REFERENCE ANGLE-defining edge is about to appear in the series of digital pulses produced from the first sensor coil's output.
582860
Fitzner Arthur O.
Harmer William D.
Brunswick Corporation
Mitchell Richard J.
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