Asymmetric magnetization fixture
First Claim
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1. A fixture for magnetizing a magnetic material to produce magnetic poles of non-uniform strength, the fixture comprising:
- a support;
an electrically conductive wire disposed in a planar serpentine path on said support forming a plurality of serpentine loops; and
a plurality of magnetic field intensifiers and magnetic field suppressors, the magnetic field intensifiers and magnetic field suppressors being placed in the areas of said support between the serpentine loops of the conductive wire whereby the strength of adjacent magnetic poles produced in non-uniform.
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Abstract
A high resolution sensor for internal combustion engines has symmetric and asymmetric magnetic encoders mounted on a support plate for synchronous rotation with the engine. Hall-effect sensor devices monitor the magnetic fields of the encoders and transmit signals to an Electronic Engine Control Unit. Ignition and fuel injection timing are deduced from the positions of the magnetic encoders. The encoders are magnetized on a fixture which establishes the size, strength, and location of each pole.
13 Citations
17 Claims
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1. A fixture for magnetizing a magnetic material to produce magnetic poles of non-uniform strength, the fixture comprising:
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a support; an electrically conductive wire disposed in a planar serpentine path on said support forming a plurality of serpentine loops; and a plurality of magnetic field intensifiers and magnetic field suppressors, the magnetic field intensifiers and magnetic field suppressors being placed in the areas of said support between the serpentine loops of the conductive wire whereby the strength of adjacent magnetic poles produced in non-uniform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A fixture for magnetizing a magnetic material to produce magnetic poles of non-uniform strength, the fixture comprising:
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a support; an electrically conductive wire disposed in a planar serpentine path on said support forming a plurality of serpentine loops; a spacer material; and a pluality of magnetic field intensifiers and magnetic field suppressors, the spacer material is located within a first serpentine loop, the magnetic field suppressors being located in the adjacent serpentine loops and proximate the first serpentine loop, and the magnetic field intensifiers being located in the adjacent serpentine loops proximate the magnetic field suppressors and distal the first serpentine loop whereby the strength of adjacent magnetic poles produced is non-uniform. - View Dependent Claims (12, 13, 14)
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15. A fixture for magnetizing a magnetic material to produce magnetic poles of non-uniform strength and non-uniform spacing, the fixture comprising:
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a support; an electrically conductive wire disposed in a planar serpentine path forming a plurality of serpentine loops on said support, the serpentine loops having non-uniform spacing; and a plurality of magnetic field intensifiers and magnetic field suppressors the magnetic field intensifiers and magnetic field suppressors being placed in the areas of said support between the serpentine loops of the conductive wire whereby the strength of adjacent magnetic poles produced is non-uniform and the spacing of the magnetic poles produced in non-uniform. - View Dependent Claims (16, 17)
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Specification