EP0044744A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of and device for providing an electrical signal in an ignition system
Assignee: EDA Sparkrite Ltd
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Filing: 1981-07-22
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Granted: —
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Expires: 2001-07-22
Abstract
Abstract The firing of a spark plug of an internal combustion engine is triggered by a Hall effect device (11) mounted adjacent to an annular magnet (10) which is rotated by the engine. On a peripheral surface (15) of the magnet, are adjacent magnetic pole faces of opposite polarity.
Inventors
- 👤 Bruce Stanley Gunton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 04:57
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A method of providing an electrical signal dependent upon the relative rotational position of a body and a sensor,characterised in that there is asssociated with the body a magnetic field, when one of the body (10) and sensor (11) rotates relative to the other, the direction of a component of the magnetic field at the sensor undergoes reversal and the sensor responds to such reversal by providing the signal.
Claim 2
Independent Claim
69 words
A method of providing an electrical signal dependent upon the relative rotational position of a body and a sensor,characterised in that there is asssociated with the body a magnetic field, when one of the body (10) and sensor (11) rotates relative to the other, the direction of a component of the magnetic field at the sensor undergoes reversal and the sensor responds to such reversal by providing the signal.
Claim 3
Dependent Claim
32 words
A method according to Claim 1 wherein, during manufacture, the body (10) is formed into an annular ring and then magnetised, magnetic poles being induced upon the surface of said annular ring.
Claim 4
Independent Claim
22 words
A method according to any preceding claim wherein said signal comprises a change in a flow of current in the sensor (11).
Claim 5
Independent Claim
86 words
A device comprising first and second elements, the first element being mounted for rotation relative to the second element,charaterised in that one of the elements is a body (10) with which there is associated a magnetic field and the other element is a sensor (11), the sensor being arranged in proximity to the body and adapted to respond to a reversal in direction of the magnetic field of the body at the sensor arising from said rotation of the first element by providing an output signal.
Claim 6
Independent Claim
86 words
A device comprising first and second elements, the first element being mounted for rotation relative to the second element,charaterised in that one of the elements is a body (10) with which there is associated a magnetic field and the other element is a sensor (11), the sensor being arranged in proximity to the body and adapted to respond to a reversal in direction of the magnetic field of the body at the sensor arising from said rotation of the first element by providing an output signal.
Claim 7
Dependent Claim
33 words
A device according to Claim 4 wherein said body (10) comprises at least one North pole face and at least one South pole face at or adjacent to the periphery of the body.
Claim 8
Dependent Claim
20 words
A device according to Claim 5 wherein there is no significant gap between the adjacent North and South pole faces.
Claim 9
Independent Claim
19 words
A device according to any of Claims 4 to 6 wherein the sensor consists of a Hall effect device.
Claim 10
Dependent Claim
61 words
A spark ignition internal combustion engine having an ignition system which includes a spark plug (23), a control unit (20)for controlling the discharge of electrical energy at the spark plug, a device according to any one of Claims 4 to 7 and means for rotating the first element (10) at a speed dependent on the speed of operation of the engine.
Claim 11
Dependent Claim
55 words
An engine according to Claim 8 wherein the sensor is a Hall effect device, comprising a multi-vibrator (18) and a Hall effect element (17), wherein the multi-vibrator is connected with a control unit (20) by a single lead (19) along which there passes a signal which triggers the discharge of energy at the spark plug.
Claim 12
Dependent Claim
15 words
Any novel feature or novel combination of features disclosed herein or in the accompanying drawing.
Claim 13
Dependent Claim
15 words
Any novel feature or novel combination of features disclosed herein or in the accompanying drawing.
References Cited (Backward Citations)
No citation records indexed.
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