EP0872631A1 - Ensemble arbre à cames - disque indicateur de position angulaire pour moteur à combustion interne - Google Patents

Ensemble arbre à cames - disque indicateur de position angulaire pour moteur à combustion interne Download PDF

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Publication number
EP0872631A1
EP0872631A1 EP98105315A EP98105315A EP0872631A1 EP 0872631 A1 EP0872631 A1 EP 0872631A1 EP 98105315 A EP98105315 A EP 98105315A EP 98105315 A EP98105315 A EP 98105315A EP 0872631 A1 EP0872631 A1 EP 0872631A1
Authority
EP
European Patent Office
Prior art keywords
camshaft
segments
long
short
sensor disk
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
EP98105315A
Other languages
German (de)
English (en)
Other versions
EP0872631B1 (fr
Inventor
Franz-Josef Bielefeld
Hans-Ulrich Dipl.-Ing. Jahrens
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP0872631A1 publication Critical patent/EP0872631A1/fr
Application granted granted Critical
Publication of EP0872631B1 publication Critical patent/EP0872631B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/04—Sensors
    • F01L2820/041—Camshafts position or phase sensors

Definitions

  • the invention relates to an arrangement of a camshaft sensor disk for camshaft position detection on a camshaft of an internal combustion engine according to the preamble of Claim 1.
  • crankshaft rotates twice per cycle and sweeps an angle of 720 ° before a certain cylinder is the same again Occupies a working position.
  • it is therefore not sufficient to close the angular position of the crankshaft within one revolution determine.
  • It must also be detected whether the internal combustion engine is currently in the first or in the second half of the work cycle corresponding to the first or second Crankshaft revolution. Such a cylinder detection is in connection with a modern internal combustion engine control required.
  • an encoder arrangement is known (EP 0 572 584 B1) with an encoder disk which is connected to the crankshaft is connected and on its periphery a variety of similar angle marks and has a reference mark.
  • a second encoder disc with the Camshaft of the internal combustion engine connected to the circumference of different lengths Has segments with spaces. The number of segments corresponds to the number the cylinder. Half of the segments consist of successive short segments and successive long segments, being between the long segments there are short spaces and there are long spaces between the short segments. In addition, there may be a short or between the short and long segments long separation space.
  • crankshaft encoder disk and the camshaft encoder disk are for example, inductive sensors or Hall sensors.
  • the at The signals generated by the angular marks or the segments in the sensors pass by are fed to a control unit and there for precise cylinder recognition and Position detection evaluated.
  • combinations of the electrical Signals considering short high or low phases, the short and long Are assigned to segments, evaluated for cylinder recognition.
  • the camshaft sensor disk was previously manufactured as a separate disk and rotatably connected together with the camshaft.
  • the production of the disc, if necessary, an adjustment to the cam position and the assembly are relative complex.
  • tolerances are possible, which in unfavorable conditions Errors
  • the object of the invention is to provide a generic arrangement of a camshaft sensor disk for camshaft position detection on a camshaft of an internal combustion engine so that the manufacturing and assembly costs work well be reduced.
  • the camshaft sensor disk and the camshaft are in one piece and made of the same material as a unit.
  • the camshaft sensor disk and the camshaft are particularly advantageously made in one piece with the formation of the segments and at least part of the spaces poured.
  • a simple casting process with two mold boxes is possible, their Demoulding plane lies in a central longitudinal plane of the camshaft. If the location is suitable Camshaft encoder disks in the molding boxes have no or only a few flanks the segments that form undercuts. Thus, at least part of the Segments and their gaps can be cast directly and without post-processing.
  • at least some of the segment lengths and space lengths as well as the assigned signal lengths are not critical, so that corresponding casting-related length tolerances are not critical for cylinder detection.
  • Postprocesses are therefore only required where there are undercuts in the segments with respect to the demoulding plane in the finished state occur and this due to the simple casting process without Insert parts or sliders cannot be produced. Post-processing can also be done there be required where exact flank positions of the cylinder and position detection Segments are required.
  • camshaft sensor disk has four segments, such that two are long Segments are followed by two short segments, with short segments following the long segments Gaps and long gaps following the short segments.
  • the demolding plane is expedient in a radial plane of the camshaft encoder disk placed so that this one hand at the end of the first long space and on the other hand is opposite at the beginning of the second long segment. Thereby the corresponding segment flanks run in the demoulding plane.
  • the flanks at the beginning and end of the first short segment and the Edge at the beginning and possibly at the end of the first long segment standing upright the demoulding plane can be selected so that demoulding also with respect to these flanks is possible without undercuts.
  • the space between the two long segments can also be so that the flank is not radial at the end of the first long segment runs rather perpendicular to the demoulding plane and is therefore a simple one Demolding without undercuts is possible.
  • An assigned must be on this edge Sensor usually recognize exactly "Low”, so that post-processing to a precisely defined edge position is appropriate. Because such post-processing here this space between the two long ones may be necessary anyway Segments can also be fully or partially cast from the outset and then after be removed from the mold.
  • FIG. 1 shows a unit 1 composed of a camshaft sensor disk 2 and a camshaft 3 shown, the camshaft sensor disk 2 and the camshaft 3 as a unit 1 in one piece and uniform in material with a simple casting process with two mold boxes is made.
  • camshaft sensor disk 2 and the camshaft 3 rotate together by one central axis 4 clockwise according to arrow 5.
  • Segments of different lengths are included on the circumference of the camshaft sensor disk 2 Interspaces arranged, the disk diameter according to the arrows 6 and 7 in the segment areas is significantly larger than the space areas.
  • first and second short ones Segment 8, 9 a first and second long segment 10, 11.
  • first and second long space 12, 13 and following the long segments 10, 11 each have a first and a second short space 14, 15.
  • the demoulding level lies 16 in a radial plane on the one hand at the end of the first long space 12 or on the start flank of the second short segment 9 and on the other hand at the end of the first shorter space 14 or on the starting flank of the second long segment 11.
  • the direction of removal is shown with arrows 17.
  • flanks are at the beginning and on End of the first short segment 8 and the edges at the beginning and end of the first long segment 10 perpendicular to the demolding plane 16.
  • flank 18 between the first and second long segments 10, 11 is by milling reworked exactly, so that here there are exact angular relationships (indicated by arrows 19, 20) for an accurate and reliable "low" detection by an assigned sensor surrender.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
EP98105315A 1997-04-16 1998-03-24 Ensemble arbre à cames - disque indicateur de position angulaire pour moteur à combustion interne Expired - Lifetime EP0872631B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19715856 1997-04-16
DE19715856A DE19715856B4 (de) 1997-04-16 1997-04-16 Nockenwellenanordnung

Publications (2)

Publication Number Publication Date
EP0872631A1 true EP0872631A1 (fr) 1998-10-21
EP0872631B1 EP0872631B1 (fr) 2002-11-13

Family

ID=7826671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105315A Expired - Lifetime EP0872631B1 (fr) 1997-04-16 1998-03-24 Ensemble arbre à cames - disque indicateur de position angulaire pour moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP0872631B1 (fr)
DE (2) DE19715856B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349844A1 (de) 2003-10-25 2005-05-25 Dr.Ing.H.C. F. Porsche Ag Mehrstufiges Schaltgetriebe für eine Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930157A1 (de) * 1989-09-09 1991-03-21 Bosch Gmbh Robert Einrichtung zur verstellung der drehwinkelzuordnung einer nockenwelle zu ihrem antriebselement
WO1993012333A1 (fr) * 1991-12-18 1993-06-24 Robert Bosch Gmbh Systeme de capteurs pour l'identification des cylindres dans un moteur a combustion interne muni de n cylindres
EP0839990A1 (fr) * 1996-11-01 1998-05-06 Roland Klaar Arbre à cames assemblé

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5799225A (en) * 1980-12-11 1982-06-19 V I V Eng Kk Cam shaft
DE3926430C2 (de) * 1989-08-10 1995-09-21 Audi Ag Verfahren und Vorrichtung zum phasenrichtigen Einstellen von Nockenwellen
DE4141714C2 (de) * 1991-12-18 2002-11-14 Bosch Gmbh Robert Steuersystem für eine Brennkraftmaschine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930157A1 (de) * 1989-09-09 1991-03-21 Bosch Gmbh Robert Einrichtung zur verstellung der drehwinkelzuordnung einer nockenwelle zu ihrem antriebselement
WO1993012333A1 (fr) * 1991-12-18 1993-06-24 Robert Bosch Gmbh Systeme de capteurs pour l'identification des cylindres dans un moteur a combustion interne muni de n cylindres
EP0572584A1 (fr) 1991-12-18 1993-12-08 Bosch Gmbh Robert Systeme de capteurs pour l'identification des cylindres dans un moteur a combustion interne muni de n cylindres.
EP0839990A1 (fr) * 1996-11-01 1998-05-06 Roland Klaar Arbre à cames assemblé

Also Published As

Publication number Publication date
DE59806232D1 (de) 2002-12-19
DE19715856B4 (de) 2005-01-27
DE19715856A1 (de) 1998-10-29
EP0872631B1 (fr) 2002-11-13

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