EP0071885A2 - Roue dentée génératrice d'impulsions possédant une dent référencée - Google Patents

Roue dentée génératrice d'impulsions possédant une dent référencée Download PDF

Info

Publication number
EP0071885A2
EP0071885A2 EP82106828A EP82106828A EP0071885A2 EP 0071885 A2 EP0071885 A2 EP 0071885A2 EP 82106828 A EP82106828 A EP 82106828A EP 82106828 A EP82106828 A EP 82106828A EP 0071885 A2 EP0071885 A2 EP 0071885A2
Authority
EP
European Patent Office
Prior art keywords
sprocket according
tooth head
tooth
insert
slot
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
Application number
EP82106828A
Other languages
German (de)
English (en)
Other versions
EP0071885A3 (en
EP0071885B1 (fr
Inventor
Manfred Knüfelmann
Burkhard Brandner
Reinhold Blauhut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Engineering GmbH
Original Assignee
AFT Atlas Fahrzeugtechnik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6138710&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0071885(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by AFT Atlas Fahrzeugtechnik GmbH filed Critical AFT Atlas Fahrzeugtechnik GmbH
Priority to AT82106828T priority Critical patent/ATE30460T1/de
Publication of EP0071885A2 publication Critical patent/EP0071885A2/fr
Publication of EP0071885A3 publication Critical patent/EP0071885A3/de
Application granted granted Critical
Publication of EP0071885B1 publication Critical patent/EP0071885B1/fr
Expired legal-status Critical Current

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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
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F02P7/0675—Electromagnetic pick-up devices, e.g. providing induced current in a coil with variable reluctance, e.g. depending on the shape of a tooth

Definitions

  • the invention relates to a pulse generator ring gear with a marked tooth head.
  • the pulse generator spider is opposed to a tooth pulse sensor.
  • the tooth pulse sensor is aligned with the circumference of the pulse generator ring gear and contains a high-frequency excitation coil which emits an electromagnetic high-frequency excitation field.
  • This high-frequency excitation field penetrates the ring gear and is influenced or modulated by the passing teeth of the ring gear. This modulation can be detected in an evaluation circuit and can be used to generate tooth pulses.
  • the tooth impulses represent speed and angle information that can be used for measurements, control and regulation.
  • One field of application of the invention is a pulse-controlled ignition system for internal combustion engines, in which the starter ring gear is used to provide these tooth pulse signals.
  • the teeth of the ring gear cause eddy current losses on the one hand and on the other hand change the permeability of the magnetic circuit. This results in changes in the high-frequency field, which can be detected in evaluation circuits.
  • the object of the invention is such a tooth marking that a permanent and reliably verifiable detection of the marked tooth is possible without the mechanical functions of the ring gear be affected.
  • the influence on the high-frequency field must be large enough to enable reliable evaluation.
  • the marked tooth head has an area with a material whose relative permeability and / or specific eddy current losses are different from those of the ring gear itself.
  • the relative permeability of the ring gear itself has a value of about 100.
  • Substances with a high relative permeability and thus also high magnetic conductivity are soft iron, mu-metal, amorphous metal, metallic glasses, which are suitable as materials for the marking.
  • a material with comparatively low eddy current losses can be used as the material in order to ensure a corresponding influence on the high-frequency field.
  • the marking enables a significant change in the high-frequency field compared to the change in the high-frequency field caused by a normal tooth, so that a reliable detection of the marked tooth is possible.
  • the invention proposes that the marked tooth head has an axial slot into which an insert made of the material mentioned is inserted.
  • the tooth tip in question is permanently and reliably marked.
  • the insert is designed as a U-shaped folded sheet metal part. This has several gaps in the transverse direction between the sheet metal surfaces and has the effect of a transformer sheet stack.
  • the pinion of the starter With the starter ring gear on the flywheel of an internal combustion engine, the pinion of the starter is engaged in the axial direction during the starting process. If the single tooth hits the slot of the tooth marking, damage to the marked tooth can occur.
  • the invention provides that the slot depth decreases after an end face of the ring gear. In extreme cases, the slot can run out after the end face mentioned. As a result, no damage to the marked tooth can occur on this end face when the starter is engaged.
  • the insert is on the end faces of the ring gear with the Slot edges welded. This also ensures that the surfaces of the insert and the tooth head are not integrally connected to one another in the axial direction, so that eddy current paths are interrupted.
  • the axial longitudinal edges can also be welded to the slot edges. Protruding sheet metal edges during welding prevents the welding agent from clogging the middle gap of the insert. The protruding sheet metal edges are subsequently removed.
  • the tooth marking can also be done in such a way that a film made of the material mentioned is attached to the tooth head. In this case, any mechanical weakening of the marked tooth is excluded.
  • the thin film of the marking material contains amorphous metal, mu-metal or another low eddy current loss material with high permeability.
  • the film thickness is approximately 0.03 to 0.1 mm.
  • the film must be attached gently to prevent damage to the material due to excessive heating or other stress.
  • the attachment can be done by resistance spot welding, by ultrasonic spot welding or by gluing.
  • the warming must not exceed 300 ° C. This is guaranteed when using a microelectrode.
  • Fig. 1 shows a section of the starter ring gear 1 for the starter of an internal combustion engine, not shown.
  • the circumferential end faces of the tooth heads 2 of the teeth 3 are opposed by a tooth pulse sensor 4, to which a tooth pulse generator 5 is connected.
  • the tooth pulse generator generates an electromagnetic high-frequency field, which is emitted by means of a coil within the tooth pulse sensor 4.
  • the field penetrates the teeth of the ring gear.
  • the high-frequency field is modulated in accordance with the permeability of the tooth tips, which is different from air, or the eddy current losses. This modulation can be evaluated, so that a generation tooth pulse is possible.
  • a tooth head 6 is marked so that it can be used as a reference tooth head to represent a reference phase.
  • this tooth head 6 has an axial slot 7 which rises towards the end face 8 of the starter ring gear 1 or the tooth head 6, cf. 2 in particular.
  • the axial slot can run out on this end face 8 on the peripheral surface of the tooth head 6, so that the axial slot 7 does not intersect the end face 8. Because on this end face 8 the pinion of the starter is engaged.
  • the axial slot 7 receives an insert 9 which is adapted to the profile of the axial slot 7 and is wedge-shaped in the case of an axial slot of the shape shown. While the ring gear itself consists of a material with comparatively high eddy current losses, the material of the system 9 has low eddy current losses. It is e.g. around soft iron, mu-metal or the like. As a result, a clearly deviating signal is obtained in the tooth pulse sensor 4 for the marked tooth head 6, which signal can be evaluated accordingly.
  • the insert 9 is fastened to the end faces of the starter ring by welded connections 11. Such welded connections must not be present on the peripheral surface so that the eddy current paths are interrupted.
  • Permeability can also be used as a different material property.
  • the ring gear is usually made of iron and, as a result, has a relative permeability of approximately 100.
  • the relative permeability of the marking material must have substantially larger values, approximately 250,000 to 500,000.
  • Such materials are mu-metal, amorphous metal, ferrite.
  • the shape of the axial slot 7 with increasing foot surface ensures that there is no weakening of the tooth head 6 on the end face 8, so that no damage to the tooth head is to be feared during the starter engagement process.
  • Fig. 3 shows an embodiment in which the insert is designed as a folded sheet metal part 10, so that the eddy current losses are reduced even further.
  • the sheet metal part inserted into the slot can initially protrude over the slot edges with edge strips 21.
  • the outer radial sheet metal edges are connected to the slot edges by weld seams 11.
  • the edge strips 21 are removed, so that the weld seams 11 and the sheet metal edges are flush with the slot edges.
  • Pie border streak fen 21 prevent the welding agent from flowing into the gap between the metal strips. As a result, a safe blocking effect of the column for eddy currents is guaranteed.
  • the insert is only cohesively connected to the tooth head at the end faces by welded connections 11.
  • Such welded connections are not present on the peripheral surface of the tooth head, so that there is no integral connection between the surfaces of the insert 9 or the flat part 10 and the material of the tooth head.
  • the folded sheet metal part acts like a transformer sheet pack. As a result, the low eddy current losses remain guaranteed.
  • weld seams 11 ' can also be provided on the top surface of the tooth head, in order to increase the mechanical stability of the arrangement.
  • FIG. 4 shows a further embodiment of the invention with a film 12 which is connected to the peripheral surface of the tooth head 6 by connections 13.
  • the film 12 consists of amorphous metal, mu-metal or a similar low eddy current loss material and has a thickness of C, 03 to 0.1 mm. It can be attached to the tooth head by resistance spot welding. With this resistance spot welding, the temperature load on the film can be kept low so that the magnetic properties of the marking material are not changed.
  • the film can also be attached to the tooth head by gluing or by ultrasonic welding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gears, Cams (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Testing Of Engines (AREA)
EP82106828A 1981-08-06 1982-07-28 Roue dentée génératrice d'impulsions possédant une dent référencée Expired EP0071885B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106828T ATE30460T1 (de) 1981-08-06 1982-07-28 Impulsgeberzahnkranz mit einem markierten zahnkopf.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3131121A DE3131121C2 (de) 1981-08-06 1981-08-06 Zahnkranz mit einem markierten Zahnkopf
DE3131121 1981-08-06

Publications (3)

Publication Number Publication Date
EP0071885A2 true EP0071885A2 (fr) 1983-02-16
EP0071885A3 EP0071885A3 (en) 1983-06-29
EP0071885B1 EP0071885B1 (fr) 1987-10-28

Family

ID=6138710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106828A Expired EP0071885B1 (fr) 1981-08-06 1982-07-28 Roue dentée génératrice d'impulsions possédant une dent référencée

Country Status (4)

Country Link
EP (1) EP0071885B1 (fr)
JP (1) JPS5830618A (fr)
AT (1) ATE30460T1 (fr)
DE (2) DE3131121C2 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225528A1 (fr) * 1985-11-25 1987-06-16 Siemens Aktiengesellschaft Dispositif d'identification d'impulsions angulaires
WO1988001691A1 (fr) * 1986-09-05 1988-03-10 Robert Bosch Gmbh Dispositif de commande d'un moteur a combustion interne
FR2779519A1 (fr) * 1998-06-09 1999-12-10 Suisse Electronique Microtech Capteur magnetique inductif avec index de reference
WO2003002946A1 (fr) * 2001-06-29 2003-01-09 Abb Ab Procede permettant de determiner la position angulaire d'un volant d'inertie
FR3083572A1 (fr) * 2018-07-06 2020-01-10 Continental Automotive France Cible de vilebrequin avec dent entaillee et procede de synchronisation d'un moteur a combustion interne
US11131567B2 (en) 2019-02-08 2021-09-28 Honda Motor Co., Ltd. Systems and methods for error detection in crankshaft tooth encoding
US11162444B2 (en) 2019-02-08 2021-11-02 Honda Motor Co., Ltd. Systems and methods for a crank sensor having multiple sensors and a magnetic element
US11181016B2 (en) 2019-02-08 2021-11-23 Honda Motor Co., Ltd. Systems and methods for a crank sensor having multiple sensors and a magnetic element
US11199426B2 (en) 2019-02-08 2021-12-14 Honda Motor Co., Ltd. Systems and methods for crankshaft tooth encoding
US11959820B2 (en) 2021-03-17 2024-04-16 Honda Motor Co., Ltd. Pulser plate balancing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6060024A (ja) * 1983-09-09 1985-04-06 Nissan Motor Co Ltd 車両におけるロ−ル剛性制御装置
JPS61120918A (ja) * 1984-11-17 1986-06-09 Nissan Motor Co Ltd クランク角度検出器
DE3630271C2 (de) * 1986-09-05 1995-08-10 Bosch Gmbh Robert Vorrichtung zum Steuern einer Brennkraftmaschine
DE4120984A1 (de) * 1990-06-26 1992-01-09 Mazda Motor Sensor mit einem magnetfilm und verfahren zu dessen herstellung
DE10032061A1 (de) * 2000-07-01 2002-01-10 Alpha Getriebebau Gmbh Zahnrad
DE10135385B4 (de) * 2000-08-16 2005-06-02 Sew-Eurodrive Gmbh & Co. Kg Verzahntes Teil und ein- oder mehrstufige Planetengetriebe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772650A (en) * 1955-07-15 1956-12-04 Cook Edward Donald Timing indicator tape
GB947208A (en) * 1959-07-23 1964-01-22 Standard Telephones Cables Ltd Improvements in or relating to time sweep indicating arrangements
FR2316796A1 (fr) * 1975-07-02 1977-01-28 Hartig Gunter Emetteur d'impulsions
GB2059598A (en) * 1979-09-29 1981-04-23 Bosch Gmbh Robert Inductive rotational speed or position transducers
FR2479453A1 (fr) * 1980-03-27 1981-10-02 Bosch Gmbh Robert Dispositif detecteur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5515665A (en) * 1978-07-20 1980-02-02 Nissha Printing Co Ltd Method of simultaneously performing foll decorating and resist printing for synthetic resin and transfer material used for this

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772650A (en) * 1955-07-15 1956-12-04 Cook Edward Donald Timing indicator tape
GB947208A (en) * 1959-07-23 1964-01-22 Standard Telephones Cables Ltd Improvements in or relating to time sweep indicating arrangements
FR2316796A1 (fr) * 1975-07-02 1977-01-28 Hartig Gunter Emetteur d'impulsions
GB2059598A (en) * 1979-09-29 1981-04-23 Bosch Gmbh Robert Inductive rotational speed or position transducers
FR2479453A1 (fr) * 1980-03-27 1981-10-02 Bosch Gmbh Robert Dispositif detecteur

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225528A1 (fr) * 1985-11-25 1987-06-16 Siemens Aktiengesellschaft Dispositif d'identification d'impulsions angulaires
WO1988001691A1 (fr) * 1986-09-05 1988-03-10 Robert Bosch Gmbh Dispositif de commande d'un moteur a combustion interne
US4848298A (en) * 1986-09-05 1989-07-18 Robert Bosch Gmbh Device for controlling internal combustion engine
FR2779519A1 (fr) * 1998-06-09 1999-12-10 Suisse Electronique Microtech Capteur magnetique inductif avec index de reference
EP0964225A1 (fr) * 1998-06-09 1999-12-15 CSEM Centre Suisse d'Electronique et de Microtechnique S.A. - Recherche et Développement Capteur magnétique inductif avec index de référence
WO2003002946A1 (fr) * 2001-06-29 2003-01-09 Abb Ab Procede permettant de determiner la position angulaire d'un volant d'inertie
FR3083572A1 (fr) * 2018-07-06 2020-01-10 Continental Automotive France Cible de vilebrequin avec dent entaillee et procede de synchronisation d'un moteur a combustion interne
US11131567B2 (en) 2019-02-08 2021-09-28 Honda Motor Co., Ltd. Systems and methods for error detection in crankshaft tooth encoding
US11162444B2 (en) 2019-02-08 2021-11-02 Honda Motor Co., Ltd. Systems and methods for a crank sensor having multiple sensors and a magnetic element
US11181016B2 (en) 2019-02-08 2021-11-23 Honda Motor Co., Ltd. Systems and methods for a crank sensor having multiple sensors and a magnetic element
US11199426B2 (en) 2019-02-08 2021-12-14 Honda Motor Co., Ltd. Systems and methods for crankshaft tooth encoding
US11959820B2 (en) 2021-03-17 2024-04-16 Honda Motor Co., Ltd. Pulser plate balancing

Also Published As

Publication number Publication date
EP0071885A3 (en) 1983-06-29
DE3131121A1 (de) 1983-02-24
EP0071885B1 (fr) 1987-10-28
JPS5830618A (ja) 1983-02-23
DE3131121C2 (de) 1984-11-15
DE3277541D1 (en) 1987-12-03
ATE30460T1 (de) 1987-11-15

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