EP0030078A1 - Rotor arm assembly for use in an ignition distributor incorporating a contactless signal generator for an electronic ignition system - Google Patents
Rotor arm assembly for use in an ignition distributor incorporating a contactless signal generator for an electronic ignition system Download PDFInfo
- Publication number
- EP0030078A1 EP0030078A1 EP19800303800 EP80303800A EP0030078A1 EP 0030078 A1 EP0030078 A1 EP 0030078A1 EP 19800303800 EP19800303800 EP 19800303800 EP 80303800 A EP80303800 A EP 80303800A EP 0030078 A1 EP0030078 A1 EP 0030078A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor arm
- vane
- rotor
- distributor
- arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/061—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle pick-up devices without mechanical contacts
Definitions
- This invention relates to a rotor arm assembly, and to a method of manufacturing such an assembly, for use in an ignition distributor of the kind which incorporates a contactless signal generator, for example a Hall effect transducer, the signals from which are used to effect operation of an electronic ignition system.
- a contactless signal generator for example a Hall effect transducer
- Ignition distributors are of course produced in a very wide variety of different forms and sizes, and the different forms and sizes all have in common the need for a fixed sensor and a part which is rotated in accordance with engine speed, the rotation of the moving part being sensed by the sensor to produce the output signals controlling the operation of the electronic ignition system.
- the moving part is generally known as a vane and is commonly in the form of a disc having a peripheral flange, the flange extending at right angles to the plane of the disc and being slotted. It is known to construct an ignition distributor as original equipment including such a contactless signal generator.
- the vane is carried by the rotor arm of the distributor, and thus rotates with the rotor arm and the rotor shaft of the distributor.
- the vane which may be metallic, is incorporated into the moulding of the rotor arm so that the rotor arm and vane are of unitary construction.
- a rotor arm assembly includes an existing rotor arm manufactured without the provision of a vane, and intended for a conventional mechanical ignition distributor, and a vane for a contactless signal generator, the vane having therein a centrally disposed aperture within which a cylindrical region of the rotor arm is received as a press fit whereby the vane is attached to the rotor arm to rotate therewith, the vane being positioned on the rotor arm with its intended axis of rotation coextensive with the axis of rotation of-the rotor arm, in an angular position which is determined in relation to the rotor arm such that the vane will have the desired angular relationship to the rotor shaft of the distributor when the rotor arm is engaged in the conventional manner with the rotor shaft of the distributor, and in an axial position in relation to the axis of rotation of the rotor arm such that the vane will occupy a desired axial position in relation to the sensor fitted within the distributor, again when the rotor arm is
- an adhesive is utilized to augment the press fit between the rotor arm and the vane in securing the vane to the rotor arm.
- the assembly includes a disc-like synthetic resin flash shield secured to the rotor arm and extending between the vane and the conductive element of the rotor arm.
- the invention further resides in a method of manufacturing a rotor arm assembly comprising selecting a rotor arm from a stock of existing rotor arms, and securing thereto, in a predetermined angular and axial position, a vane for a contactless signal generator, the vane being secured to the rotor arm by press fitting the vane onto the rotor arm.
- the stop of securing the vane to the rotor arm includes the application to the rotor arm and/or the vane of an adhesive to augment the press fit between the vane and the rotor arm in securing the vane to the rotor arm.
- the method includes the step of machining the existing rotor arm to provide thereon a cylindrical region having its axis coextensive with the intended axis of rotation of the rotor arm, and of a diameter so related to the diameter of a centrally disposed aperture in the vane, that the vane can be engaged as a tight press fit with said cylindrical region, the machining step further providing a peripheral shoulder on the rotor arm, the shoulder extending in a plane at right angles to the axis of rotation of the rotor arm, and being at an axial location such that engagement of the vane with the shoulder ensures the correct subsequent axial location of the vane relative to the sensor of the ignition distributor when the rotor arm is engaged normally with the rotor shaft of the distributor.
- the method includes the further step of securing a disc-like synthetic resin flash shield to the rotor arm, the flash shield lying between the vane and the conductive element of the rotor arm.
- an ignition distributor including a contactless signal generator includes a hollow cup-shaped casing 11, supporting a rotor shaft 12 for rotation therein.
- An open end of the casing 11 is closed by a moulded synthetic resin cap 13 the cap 13 having a high voltage input terminal 14 disposed on the axis of rotation of the rotor shaft 12.
- a number of high tension output terminals 15 are Positioned around the terminal 14 equal in number to the number of spark plugs of an internal combustion engine to be served by the distributor.
- Within the casing 11 of the distributor is a fixed base plate l6 upon which is mounted the fixed sensor 17 of the contactless signal generator.
- a rotor arm 18 At the end of the rotor shaft 12 is mounted a rotor arm 18, the rotor arm 18 being secured to the end of the shaft 12 in a predetermined angular relation to the shaft 12.
- the rotor arm 18 includes a moulded synthetic resin body 19 carrying a conductive element 21.
- the element 21 co-operates permanently with the input terminal l4, and during its rotation with the shaft 12 relative to the casing 11 and cap 13 it co-operates in turn with the output terminals 15 so as to distribute high voltage sparking pulses supplied by way of the terminal 14 to the appropriate sparking plugs in turn by way of the output terminals 15.
- the rotor arm 18 carries a moulded synthetic resin flash shield 22 in the form of a disc, the flash shield 22 minimising the risk of "flash-over" from the element 21 to the conductive casing 11 of the distributor, or to any of the conductive parts secured to the casing 11.
- the rotor arm 18 also carries a vane 23 of the contactless signal generator.
- the vane is in the form of a disc 24 having a peripheral flange 25, the flange 25 extending at right angles to the plane of the disc 24 and being formed with a plurality of equiangularly spaced slots 26 equal in number to the number of cylinders of the engine to be served by the ignition distributor.
- the distributor is to serve a four cylinder engine, and thus the flange 25 of the vane 23 has four equiangularly spaced slots 26.
- the nature of the contactless signal generator is not of particular importance to the present invention, and may for example be of the electromagnetic type known as a "Hall effect" transducer.
- the vane is formed from mild steel, and the passage of alternately slots and solid parts of the flange 25 adjacent electromagnetic poles of the sensor 17 causes generation of appropriate output signals.
- the generator may however be of the optical type, wherein the material of the vane is not critical, so long as it is opaque, and the sensor includes a light source and a photosensitive aevice, the vane alterately exposing, and obscuring the photosensitive device which thus produces a sequence cf output signals again dependent upon the speed of rotation of the vane.
- the distributor may include both or either of centrifugal, and vacuum advance systems for varying the timing of the production of the signals in relation to the speed of rotation of the rotor shaft 12.
- kits for converting existing mechanical distributors would be prohibitively expensive, since it would necessitate the provision of specific moulding tools for each of the different rotor arm assembly configurations which is necessary.
- the rotor arm is internally shaped to locate on the rotor shaft 12 in a particular angular relationship to the shaft 12, and at a particular axial position relative to the terminals 14, 15 of the distributor cap. Since we utilize an existing rotor arm in our construction then this relationship is not disturbed.
- the vane 23 must also be mounted in a particular angular orientation relative to the rotor shaft, and in a particular axial location relative to the base plate l6 so as to co-operate correctly with the sensor 17.
- the existing rotor arm we prefer to machine the existing rotor arm to provide a peripheral shoulder 27 at an axial position on the rotor arm such that it can be used as an axial location for the vane, and to produce also a cylindrical region 28 having its axis coincident with the axis of rotation of the rotor arm, and having a predetermined diameter.
- each rotor arm in this manner provides a certain standardisation of rotor arms in that in the vast majority of cases we can utilize an identical flash shield and vane for each rotor arm.
- the diameter of the machined region 28 of the existing rotor arm is chosen in relation to the diameters of apertures in the flash shield 22 and disc portion 24 of the vane 23.
- a conventional rotor arm 18 is selected from stock, and if necessary is machined to provide the shoulder 27 and cylindrical region 28.
- the moulded synthetic resin disc constituting the flash shield 22 is then fitted onto the region 28 in abutment with the shoulder 27.
- the previously manufactured vane 23 is then press fitted onto the region 28 so as to abut the flash shield 22 firmly, In this manner, since the thickness of the flash shield 22 is known, the shoulder 27 serves to locate the axial position of the vane 23 relative to the rotor arm, and thus in use relative to the rotor shaft 12 and the base plate 16 of the distributor.
- the apertures of the flash shield 22 and the disc 24 of the vane 23 are of course centrally disposed, and are of a diameter such that the press fitting of the vane 23 on the cylindrical region 28 entails sufficient friction to retain the vane and flash shield in engagement with the rotor arm.
- a low viscosity adhesive is then applied to the mating surfaces of the parts permanently to bond the vane and flash shield to the rotor arm.
- the angular position of the vane in relation to the rotor arm is controlled such that in the final assembly engagement of the rotor arm onto the rotor shaft 12 will not only locate the rotor arm in the desired angular relationship to the rotor shaft, but will also locate the vane 23 in the desired angular relationship to the rotor shaft.
- the rotor arm and rotor shaft are formed with inter-engaging keys to provide the appropriabe angular location.
- a spire washer or similar clip may, if desired, by engaged with the rotor arm within the cup-shape of vane 23 adjacent the region 28 and bearing upon the vane 23 to assist the securing of the vane 23 and shield 22 in position on the rotor arm.
- the vane 23 it is desirable for the vane 23 to be electrically earthed in use, that is to say to be at the same voltage as the casing 11 of the ignition distributor.
- An electrical connection is made between the vane and the rotor shaft 12 and thus the casing 11 by means of conductive paint applied to the rotor arm either before or after assembly thereto of the vane 23.
- the paint layer extends from the region 28 into the interior of the bore of the rotor arm and thus makes electrical connection between the vane 23 and the shaft 12 either directly or through the metal clip 30 carried within the rotor arm bore which grips the rotor shaft 12.
- The.kit for converting a conventional mechanical ignition distributor to an ignition distributor including a contactless signal generator thus comprises a rotor arm assembly incorporating a rotor arm, a flash shield, and a vane, and a sensor arrangement together with an electronic module for processing the signals produced in use by the sensor.
- the existing mechanical distributor is then partially dis- embled, the contact breaker assembly being replaced by the sensor 17, and the existing rotor arm being replaced by the rotor arm assembly which will of course include a rotor arm very similar to the one which is being removed, but which carries the vane 23 and flash shield 22.
Abstract
Description
- This invention relates to a rotor arm assembly, and to a method of manufacturing such an assembly, for use in an ignition distributor of the kind which incorporates a contactless signal generator, for example a Hall effect transducer, the signals from which are used to effect operation of an electronic ignition system. It is known for an ignition distributor to incorporate a contactless signal generator. Ignition distributors are of course produced in a very wide variety of different forms and sizes, and the different forms and sizes all have in common the need for a fixed sensor and a part which is rotated in accordance with engine speed, the rotation of the moving part being sensed by the sensor to produce the output signals controlling the operation of the electronic ignition system. The moving part is generally known as a vane and is commonly in the form of a disc having a peripheral flange, the flange extending at right angles to the plane of the disc and being slotted. It is known to construct an ignition distributor as original equipment including such a contactless signal generator. In the known arrangements the vane is carried by the rotor arm of the distributor, and thus rotates with the rotor arm and the rotor shaft of the distributor. During manufacture of the rotor arm the vane, which may be metallic, is incorporated into the moulding of the rotor arm so that the rotor arm and vane are of unitary construction.
- It is now desirable to be able to convert existing mechanical ignition distributors to include a contactless signal generator. Such conversion entails the removal of the normal mechanical contact breaker assembly, and substitution therefore of a fixed sensor and a rotating vane. Clearly when producing kits for a very wide variety of conventional mechanical ignition distributors there is a severe problem in providing unitary rotor arms including vanes. The reason for this is that by no means all ignition distributors utilize the same form of rotor arm, and in order to provide kits for a wide variety of ignition distributors then it would be necessary to produce and store moulding each of a variety of rotor arms including vanes. It is considered that this would be prohibitively expensive, and it is an object of the present invention to overcome this problem.
- A rotor arm assembly according to the present invention includes an existing rotor arm manufactured without the provision of a vane, and intended for a conventional mechanical ignition distributor, and a vane for a contactless signal generator, the vane having therein a centrally disposed aperture within which a cylindrical region of the rotor arm is received as a press fit whereby the vane is attached to the rotor arm to rotate therewith, the vane being positioned on the rotor arm with its intended axis of rotation coextensive with the axis of rotation of-the rotor arm, in an angular position which is determined in relation to the rotor arm such that the vane will have the desired angular relationship to the rotor shaft of the distributor when the rotor arm is engaged in the conventional manner with the rotor shaft of the distributor, and in an axial position in relation to the axis of rotation of the rotor arm such that the vane will occupy a desired axial position in relation to the sensor fitted within the distributor, again when the rotor arm is engaged in the normal manner with the rotor shaft of the distributor.
- Preferably an adhesive is utilized to augment the press fit between the rotor arm and the vane in securing the vane to the rotor arm.
- Desirably the assembly includes a disc-like synthetic resin flash shield secured to the rotor arm and extending between the vane and the conductive element of the rotor arm.
- The invention further resides in a method of manufacturing a rotor arm assembly comprising selecting a rotor arm from a stock of existing rotor arms, and securing thereto, in a predetermined angular and axial position, a vane for a contactless signal generator, the vane being secured to the rotor arm by press fitting the vane onto the rotor arm.
- Preferably the stop of securing the vane to the rotor arm includes the application to the rotor arm and/or the vane of an adhesive to augment the press fit between the vane and the rotor arm in securing the vane to the rotor arm.
- Desirably the method includes the step of machining the existing rotor arm to provide thereon a cylindrical region having its axis coextensive with the intended axis of rotation of the rotor arm, and of a diameter so related to the diameter of a centrally disposed aperture in the vane, that the vane can be engaged as a tight press fit with said cylindrical region, the machining step further providing a peripheral shoulder on the rotor arm, the shoulder extending in a plane at right angles to the axis of rotation of the rotor arm, and being at an axial location such that engagement of the vane with the shoulder ensures the correct subsequent axial location of the vane relative to the sensor of the ignition distributor when the rotor arm is engaged normally with the rotor shaft of the distributor.
- It will be recognised that since there is a very wide variety of existing rotor arms it may well be that certain rotor arms will inherently possess a cylindrical region of the correct diameter terminating in a shoulder at a correct axial location, and when such rotor arms are selected, then the machining steps specified in the preceding paragraph will not be necessary.
- Preferably the method includes the further step of securing a disc-like synthetic resin flash shield to the rotor arm, the flash shield lying between the vane and the conductive element of the rotor arm.
- One example of the invention is illustrated in the accompanying drawings, wherein;
- Figure 1 is an extremely diagrammatic sketch of an ignition distributor incorporating a contactless signal generator,
- Figure 2 is an exploded side elevational view of the rotor assembly of the distributor shown in Figure 1,
- Figure 3 is a sectional view of the assembly shown in Figure 2 with the parts inter-engaged, and
- Figure 4 is an enlarged sectional view of part of the contactless signal generator of Figure 1.
- Referring to the drawings, an ignition distributor including a contactless signal generator includes a hollow cup-shaped casing 11, supporting a
rotor shaft 12 for rotation therein. An open end of the casing 11 is closed by a mouldedsynthetic resin cap 13 thecap 13 having a highvoltage input terminal 14 disposed on the axis of rotation of therotor shaft 12. Positioned around theterminal 14 are a number of hightension output terminals 15 equal in number to the number of spark plugs of an internal combustion engine to be served by the distributor. Within the casing 11 of the distributor is a fixed base plate l6 upon which is mounted thefixed sensor 17 of the contactless signal generator. At the end of therotor shaft 12 is mounted arotor arm 18, therotor arm 18 being secured to the end of theshaft 12 in a predetermined angular relation to theshaft 12. Therotor arm 18 includes a mouldedsynthetic resin body 19 carrying aconductive element 21. Theelement 21 co-operates permanently with the input terminal l4, and during its rotation with theshaft 12 relative to the casing 11 andcap 13 it co-operates in turn with theoutput terminals 15 so as to distribute high voltage sparking pulses supplied by way of theterminal 14 to the appropriate sparking plugs in turn by way of theoutput terminals 15. Therotor arm 18 carries a moulded syntheticresin flash shield 22 in the form of a disc, theflash shield 22 minimising the risk of "flash-over" from theelement 21 to the conductive casing 11 of the distributor, or to any of the conductive parts secured to the casing 11. Therotor arm 18 also carries avane 23 of the contactless signal generator. The vane is in the form of adisc 24 having aperipheral flange 25, theflange 25 extending at right angles to the plane of thedisc 24 and being formed with a plurality of equiangularly spacedslots 26 equal in number to the number of cylinders of the engine to be served by the ignition distributor. In the example shown in the drawings the distributor is to serve a four cylinder engine, and thus theflange 25 of thevane 23 has four equiangularly spacedslots 26. - The nature of the contactless signal generator is not of particular importance to the present invention, and may for example be of the electromagnetic type known as a "Hall effect" transducer. In such an arrangement the vane is formed from mild steel, and the passage of alternately slots and solid parts of the
flange 25 adjacent electromagnetic poles of thesensor 17 causes generation of appropriate output signals. The generator may however be of the optical type, wherein the material of the vane is not critical, so long as it is opaque, and the sensor includes a light source and a photosensitive aevice, the vane alterately exposing, and obscuring the photosensitive device which thus produces a sequence cf output signals again dependent upon the speed of rotation of the vane. - It will be recognised that Figure 1 and the foregoing description thereof are somewhat simplified, and, for example, the distributor may include both or either of centrifugal, and vacuum advance systems for varying the timing of the production of the signals in relation to the speed of rotation of the
rotor shaft 12. - It will be recognised that there are numerous different types, and sizes of ignition distributors, and equally therefore there are numerous different types and sizes of rotor arm. Clearly, where it is desired to provide a kit whereby an existing mechanical distributor can be converted to a distributor including a contactless signal generator, then it is desirable to provide within the kit a replacement rotor arm assembly to be substituted for the conventional rotor arm which of course does not carry a flash shield or or a vane. In original equipment ignition distributors incorporating contactless signal generators the vane and flash shield are part of the rotor arm, in that the rotor arm is moulded around the flash shield and vane thus resulting in a unitary construction. Clearly to provide such a unitary rotor arm assembly in kits for converting existing mechanical distributors would be prohibitively expensive, since it would necessitate the provision of specific moulding tools for each of the different rotor arm assembly configurations which is necessary. In order therefore to provide kits for converting existing mechanical distributors without such prohibitive expense we acquire a stock of existing rotor arms for conventional mechanical ignition distributors, and attach thereto flash shield and vanes. It will be recognised that the rotor arm is internally shaped to locate on the
rotor shaft 12 in a particular angular relationship to theshaft 12, and at a particular axial position relative to theterminals vane 23 must also be mounted in a particular angular orientation relative to the rotor shaft, and in a particular axial location relative to the base plate l6 so as to co-operate correctly with thesensor 17. In some instances within a very wide variety of different rotor arms there may be rotor arms which have a peripheral shoulder in such an axial position as to provide the correct location for the vane. However, in the majority of cases we prefer to machine the existing rotor arm to provide aperipheral shoulder 27 at an axial position on the rotor arm such that it can be used as an axial location for the vane, and to produce also acylindrical region 28 having its axis coincident with the axis of rotation of the rotor arm, and having a predetermined diameter. It will be recognised that the machining of each rotor arm in this manner provides a certain standardisation of rotor arms in that in the vast majority of cases we can utilize an identical flash shield and vane for each rotor arm. Thus the diameter of themachined region 28 of the existing rotor arm is chosen in relation to the diameters of apertures in theflash shield 22 anddisc portion 24 of thevane 23. - The manufacture of a rotor arm assembly is thus as follows. A
conventional rotor arm 18 is selected from stock, and if necessary is machined to provide theshoulder 27 andcylindrical region 28. The moulded synthetic resin disc constituting theflash shield 22 is then fitted onto theregion 28 in abutment with theshoulder 27. The previously manufacturedvane 23 is then press fitted onto theregion 28 so as to abut theflash shield 22 firmly, In this manner, since the thickness of theflash shield 22 is known, theshoulder 27 serves to locate the axial position of thevane 23 relative to the rotor arm, and thus in use relative to therotor shaft 12 and thebase plate 16 of the distributor. The apertures of theflash shield 22 and thedisc 24 of thevane 23 are of course centrally disposed, and are of a diameter such that the press fitting of thevane 23 on thecylindrical region 28 entails sufficient friction to retain the vane and flash shield in engagement with the rotor arm. However, for added security a low viscosity adhesive is then applied to the mating surfaces of the parts permanently to bond the vane and flash shield to the rotor arm. During the step of press fitting thevane 23 to therotor arm 18 the angular position of the vane in relation to the rotor arm is controlled such that in the final assembly engagement of the rotor arm onto therotor shaft 12 will not only locate the rotor arm in the desired angular relationship to the rotor shaft, but will also locate thevane 23 in the desired angular relationship to the rotor shaft. As is conventional, the rotor arm and rotor shaft are formed with inter-engaging keys to provide the appropriabe angular location. A spire washer or similar clip may, if desired, by engaged with the rotor arm within the cup-shape ofvane 23 adjacent theregion 28 and bearing upon thevane 23 to assist the securing of thevane 23 andshield 22 in position on the rotor arm. - It is desirable for the
vane 23 to be electrically earthed in use, that is to say to be at the same voltage as the casing 11 of the ignition distributor. An electrical connection is made between the vane and therotor shaft 12 and thus the casing 11 by means of conductive paint applied to the rotor arm either before or after assembly thereto of thevane 23. The paint layer extends from theregion 28 into the interior of the bore of the rotor arm and thus makes electrical connection between thevane 23 and theshaft 12 either directly or through themetal clip 30 carried within the rotor arm bore which grips therotor shaft 12. - The.kit for converting a conventional mechanical ignition distributor to an ignition distributor including a contactless signal generator thus comprises a rotor arm assembly incorporating a rotor arm, a flash shield, and a vane, and a sensor arrangement together with an electronic module for processing the signals produced in use by the sensor. The existing mechanical distributor is then partially dis- embled, the contact breaker assembly being replaced by the
sensor 17, and the existing rotor arm being replaced by the rotor arm assembly which will of course include a rotor arm very similar to the one which is being removed, but which carries thevane 23 andflash shield 22.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7940207 | 1979-11-21 | ||
GB7940207 | 1979-11-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0030078A1 true EP0030078A1 (en) | 1981-06-10 |
EP0030078B1 EP0030078B1 (en) | 1986-01-29 |
Family
ID=10509330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19800303800 Expired EP0030078B1 (en) | 1979-11-21 | 1980-10-27 | Rotor arm assembly for use in an ignition distributor incorporating a contactless signal generator for an electronic ignition system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0030078B1 (en) |
DE (1) | DE3071397D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0054381A1 (en) * | 1980-12-11 | 1982-06-23 | LUCAS INDUSTRIES public limited company | Rotor vane assembly |
US4641627A (en) * | 1985-05-03 | 1987-02-10 | Allied Corporation | Ignition module |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875920A (en) * | 1974-02-04 | 1975-04-08 | Manufacturing Technology Enter | Contactless ignition system using hall effect magnetic sensor |
DE2716510A1 (en) * | 1977-04-14 | 1978-10-26 | Bosch Gmbh Robert | EXCHANGE RATE FOR CONTACTLESS CONTROLLED IGNITION OF COMBUSTION MACHINES |
WO1979000495A1 (en) * | 1978-01-12 | 1979-08-09 | Ford Motor Co | Ignition distributors for internal combustion engines |
-
1980
- 1980-10-27 EP EP19800303800 patent/EP0030078B1/en not_active Expired
- 1980-10-27 DE DE8080303800T patent/DE3071397D1/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3875920A (en) * | 1974-02-04 | 1975-04-08 | Manufacturing Technology Enter | Contactless ignition system using hall effect magnetic sensor |
DE2716510A1 (en) * | 1977-04-14 | 1978-10-26 | Bosch Gmbh Robert | EXCHANGE RATE FOR CONTACTLESS CONTROLLED IGNITION OF COMBUSTION MACHINES |
WO1979000495A1 (en) * | 1978-01-12 | 1979-08-09 | Ford Motor Co | Ignition distributors for internal combustion engines |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0054381A1 (en) * | 1980-12-11 | 1982-06-23 | LUCAS INDUSTRIES public limited company | Rotor vane assembly |
US4641627A (en) * | 1985-05-03 | 1987-02-10 | Allied Corporation | Ignition module |
Also Published As
Publication number | Publication date |
---|---|
DE3071397D1 (en) | 1986-03-13 |
EP0030078B1 (en) | 1986-01-29 |
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