US4508092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic sensor for distributorless ignition system and position sensing
Assignee: Mannesmann VDO AG
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Filing: 1983-05-16
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Granted: 1985-04-02
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Expires: 2003-05-16
Abstract
Abstract A magnetic sensor for a distributorless ignition system is useable in an internal combustion engine. A Hall-effect device is spaced intermediate a pair of opposing permanent magnets for concurrently generating dual magnetic flux fields within respective air gap regions formed between each of the magnets and the device. Alternatively a magnet is placed between two Hall-effect devices to define the regions. A toothed disk rotatably connected to the crank-shaft of the engine causes different teeth to shunt the fields in each of the regions in a predetermined sequence for generating pulses at the device output indicative of the firing order of the engine. Alternatively, a disk having outer and inner notched rims is used to shunt the fields in each of the regions. Further, an elongated channel shaped member has sides movable in the regions for detecting relative linear motion between two parts.
Inventors
- 👤 Ronald J. Kiess
- 👤 Gary R. Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:53
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
221 words
Apparatus for use in a system having first and second parts that are movable relative one another comprising: magnetic means having north and south poles for providing a magnetic flux path between said north and south poles; sensor means comprising first and second sensors for sensing the magnetic flux in said path and for providing a signal corresponding to the sensed magnetic flux; mounting means for mounting said magnetic means and said first and second sensors in substantially rectilinear alignment; said magnetic means being between said first and second sensors; said first and second sensors being intersected by a line through said north and south poles; said line being substantially parallel to said flux path at said north and south poles; said first sensor being linearly spaced on said line from said magnetic means south pole to form a first open region linearly defined along said line between said first sensor and said magnetic means south pole; said second sensor being linearly spaced on said line from said magnetic means north pole to form a second open region linearly defined along said line between said magnetic means north pole and said second sensor; whereby there is provided a predetermined flux concentration in said first and second open regions and whereby said first and second open regions provide dual information sensing regions.
Claim 2
Dependent Claim
221 words
Apparatus for use in a system having first and second parts that are movable relative one another comprising: magnetic means having north and south poles for providing a magnetic flux path between said north and south poles; sensor means comprising first and second sensors for sensing the magnetic flux in said path and for providing a signal corresponding to the sensed magnetic flux; mounting means for mounting said magnetic means and said first and second sensors in substantially rectilinear alignment; said magnetic means being between said first and second sensors; said first and second sensors being intersected by a line through said north and south poles; said line being substantially parallel to said flux path at said north and south poles; said first sensor being linearly spaced on said line from said magnetic means south pole to form a first open region linearly defined along said line between said first sensor and said magnetic means south pole; said second sensor being linearly spaced on said line from said magnetic means north pole to form a second open region linearly defined along said line between said magnetic means north pole and said second sensor; whereby there is provided a predetermined flux concentration in said first and second open regions and whereby said first and second open regions provide dual information sensing regions.
Claim 3
Dependent Claim
74 words
The apparatus of claim 1 wherein said mounting means is affixed to the first part of the first and second parts; each of said open regions being dimensioned on said line to receive a respective magnetic field shunting member attached to the second part of the first and second parts so that as the first and second parts are moved relative one another each of the members correspondingly moves through its respective open region.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1 wherein each of said first and sensor sensors is a Hall effect sensor.
Claim 5
Dependent Claim
47 words
The apparatus of claim 2 wherein the system is a distributorless ignition system and one of the first and second parts is a distributor rotatable shaft mounted for rotation about its axis relative the other of the parts, the other of the parts being an engine block.
Claim 6
Dependent Claim
36 words
The apparatus of claim 2 wherein the system is a linear position sensing system and one of the first and second parts is a linear member mounted for linear movement relative the other of said parts.
Claim 7
Dependent Claim
229 words
Apparatus for use in a system having first and second parts that are movable relative one another comprising: magnetic means comprising first and second magnets each having a north and a south pole for providing a magnetic flux path between said north and south poles of each of said magnets; sensor means for sensing the magnetic flux in said paths and for providing a signal corresponding to the sensed magnetic flux; mounting means for mounting said sensor means and said first and second magnets in substantially rectilinear alignment; said sensor means being between said first and second magnets and being intersected by a line through said north and south poles of said first and second magnets; said line being substantially parallel to said first magnet flux path at said north and sourth poles of said first magnet; said first magnet being linearly spaced on said line from said sensor means to form a first open region linearly defined along said line between said first magnet and said sensor means; said second magnet being linearly spaced on said line from said sensor means to form a second open region linearly defined along said line between said second magnet and said sensor means; whereby there is provided a predetermined flux concentration in said first and second open regions and whereby said first and second open regions provide dual information sensing regions.
Claim 8
Dependent Claim
229 words
Apparatus for use in a system having first and second parts that are movable relative one another comprising: magnetic means comprising first and second magnets each having a north and a south pole for providing a magnetic flux path between said north and south poles of each of said magnets; sensor means for sensing the magnetic flux in said paths and for providing a signal corresponding to the sensed magnetic flux; mounting means for mounting said sensor means and said first and second magnets in substantially rectilinear alignment; said sensor means being between said first and second magnets and being intersected by a line through said north and south poles of said first and second magnets; said line being substantially parallel to said first magnet flux path at said north and sourth poles of said first magnet; said first magnet being linearly spaced on said line from said sensor means to form a first open region linearly defined along said line between said first magnet and said sensor means; said second magnet being linearly spaced on said line from said sensor means to form a second open region linearly defined along said line between said second magnet and said sensor means; whereby there is provided a predetermined flux concentration in said first and second open regions and whereby said first and second open regions provide dual information sensing regions.
Claim 9
Dependent Claim
14 words
The apparatus of claim 6 wherein said sensor means comprises a Hall effect sensor.
Claim 10
Dependent Claim
26 words
The apparatus of claim 6 wherein said mounting means is for mounting said magnets so that like poles of said magnets are facing said sensor means.
Claim 11
Dependent Claim
77 words
The apparatus of claim 6 wherein said mounting means is affixed to the first part of the first and second parts; each of said first and second open regions being dimensioned on said line to receive a respective magnetic field shunting member attached to the second part of the first and second parts so that as the first and second parts are moved relative one another each of the members correspondingly moves through its respective open region.
Claim 12
Dependent Claim
21 words
The apparatus of claim 3 wherein said north and south poles of said first and second magnets are in rectilinear alignment.
Claim 13
Dependent Claim
47 words
The apparatus of claim 9 wherein the system is a distributorless ignition system and one of the first and second parts is a distributor rotatable shaft mounted for rotation about its axis relative the other of the parts, the other of the parts being an engine block.
References Cited (Backward Citations)
US3139876A
Cited
US3073879A
Cited
US3291109A
Cited
US3366909A
Cited
US3518978A
Cited
US3621826A
Cited
US3807378A
Cited
US3931804A
Cited
US3792261A
Cited
US3923022A
Cited
US3921610A
Cited
US3875920A
Cited
US3976044A
Cited
US4086533A
Cited
US4109630A
Cited
US4155341A
Cited
US4204158A
Cited
US4165726A
Cited
US4290044A
Cited
US4237844A
Cited
US4235213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |