EP0280696B1 - Vorrichtung zum steuern einer brennkraftmaschine - Google Patents

Vorrichtung zum steuern einer brennkraftmaschine Download PDF

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Publication number
EP0280696B1
EP0280696B1 EP19870904848 EP87904848A EP0280696B1 EP 0280696 B1 EP0280696 B1 EP 0280696B1 EP 19870904848 EP19870904848 EP 19870904848 EP 87904848 A EP87904848 A EP 87904848A EP 0280696 B1 EP0280696 B1 EP 0280696B1
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EP
European Patent Office
Prior art keywords
perforation
combustion engine
segments
holes
recording element
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.)
Expired - Lifetime
Application number
EP19870904848
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German (de)
English (en)
French (fr)
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EP0280696A1 (de
Inventor
Richard Schleupen
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.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0280696A1 publication Critical patent/EP0280696A1/de
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    • 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 device according to the preamble of the main claim.
  • a device is e.g. known from US-A-4,327,687.
  • sensor systems for detecting the angular position of a shaft of the internal combustion engine, in particular the crankshaft or the camshaft.
  • Such systems are designed, for example, as segment systems in which sensor disks rotate with the shaft, the circumference of which is provided with a number of segments proportional to the number of cylinders of the internal combustion engine, ie elongated marked areas.
  • the number of segments When determining the angular position of the crankshaft, the number of segments is half the number of cylinders.
  • the number of segments When the angular position of the camshaft is detected, the number of segments is equal to the number of cylinders, since it is known that the crankshaft rotates at twice the speed of the camshaft.
  • Each segment is assigned to one (when the crankshaft is detected) two cylinders of the internal combustion engine, and each ignition process is controlled as a function of the passage of the associated segment.
  • segment systems with segments of the same size have the disadvantage that it is not possible to assign them sufficiently for a distributor-free or two-circuit (eg eight-cylinder engine) high-voltage distribution.
  • segment systems are known (e.g. from DE-B-1.209.361) in which individual segments are divided by a number of teeth and tooth gaps and the signals generated by the teeth or tooth gaps in the receiving element are fed to a control circuit.
  • the angular position of the shaft is determined by counting the passing teeth or tooth gaps. This method is complex and requires an additional counting device.
  • the device according to the invention with the characterizing features of the main claim has the advantage that it is possible to assign the ignition pulses for a distributor-free or dual-circuit high-voltage distribution with a single transmitter while maintaining the two electrical marks at the beginning and end of the segment.
  • the resulting electrical signals marks
  • FIG. 1 shows a basic illustration of an encoder disk
  • FIG. 2 shows a detail
  • FIG. 3 shows a modification of the detail according to FIG. 2
  • FIG. 4 shows a pulse diagram
  • FIG. 5 shows a circuit diagram.
  • 10 denotes an encoder disk which rotates with the crankshaft or the camshaft of an internal combustion engine.
  • the encoder disk 10 has segments 11, 12 on its circumference and gaps 13, 14 between them. If, as shown in FIG. 1, there are two segments or two gaps and the encoder disk is attached to the crankshaft of the internal combustion engine, it is suitable for devices for controlling four-cylinder engines.
  • the segments 11, 12 are of equal length and are diametrically opposed.
  • the segment 11 is shown in more detail. It has a sickle-like perforation 15 on its surface, which increases in width with increasing angle of the crankshaft.
  • the perforation 15 can consist of holes 16 with the same diameter, which are evenly distributed over the perforation 15.
  • the perforation 15 can also consist of a series of holes 17 exist, the diameter increases according to the increasing width of the perforation 15.
  • the perforation 15 can also be designed as an isosceles triangle.
  • the encoder disk 10 In the vicinity of the circumference of the encoder disc 10 there is a spatially fixed receiving element 20 which in turn is in operative connection with a control circuit 21.
  • the type of interaction between the encoder disk 10 and the receiving element 20 can be very different.
  • the encoder disk 10 can be stamped from ferromagnetic sheet metal, and an inductive transmitter is used as the receiving element 20, which already has a magnetic flux in the idle state.
  • the diameter of the pole core of the receiving element 20 should be larger than the diameter of the holes 16.
  • the receiving element 20 When the encoder disk 10 rotates clockwise, as shown in FIG. 1, the receiving element 20 first detects the leading edge of the segment 11, for example in the segment 11. The ignition process can then be triggered, for example, at the end of segment 11 at an angular position corresponding to the rear flanks of segment 11.
  • FIG. 4a shows a transfer of the rotary movement of the crankshaft ( ⁇ KW) to the revolution of the encoder disk 10 as a function of the angle of rotation ( ⁇ ) of the encoder disk.
  • FIG. 4b shows the magnetic flux ( ⁇ ⁇ ) generated in the receiving element 20 as a function of the angle of rotation ( ⁇ ) of the encoder disc 10. If the encoder disc 10 moves clockwise, a magnetic flux change is generated in the receiving element 20 on the front flank of the segment 11, ie at the angular position ⁇ 1.
  • the magnetic flux runs at the same level as the segment 11 moves past the receiving element 20 until the perforation 15 begins, consequently no voltage is induced. If the receiving element 20 reaches the perforation 15 of the segment 11, i.e. is the encoder disc 10 in the angular position ⁇ 2, the magnetic flux drops due to the increasing width of the perforation 15. When the receiving element 20 reaches the angular position ⁇ 3, the perforation 15 ends there and the magnetic flux increases again to the same height as between the angular position ⁇ 1 and ⁇ 2. If the receiving element 20 is in the angular position ⁇ 4, the rear flank of the segment 11, the magnetic flux drops completely.
  • FIG. 4c now shows the pulses generated in the receiving element 20.
  • a positive pulse is generated.
  • the receiving element 20 reaches the rear flank of the segments 11, 12, ie if the encoder disc 10 is in the angular position ⁇ 4 or ⁇ 6, a negative pulse is produced.
  • a small, approximately equally high pulse level is present in this area, ie between the angular positions ⁇ 2 and ⁇ 3.
  • This additional impulse caused by the end of the perforation 15, can now be used as a marking.
  • the transition from a positive to a negative pulse the trailing edge of segment 11 is clearly recognizable and distinguishable from other pulses.
  • the voltages generated on the flanks of the segments 11 and 12 and the perforation 15 in the receiving element 20 are fed to the two input terminals E1 and E2 of the evaluation circuit shown in the basic circuit diagram in FIG. 5 via the two Schmitt triggers of different switching thresholds.
  • An inverter 27 is connected to the input terminal E1 at which the voltage U+ is applied.
  • a non-inverting driver stage 28 is connected to the input terminal E2 at which the voltage U ⁇ is applied.
  • the output of the inverter 27 is connected to the inverting reset input of a flip-flop 29.
  • the output of driver stage 28 is connected to its inverting set input.
  • a line leads from the output Q of the flip-flop 29 to the clear enable input of a counter 30.
  • the inverting clear input of the counter 30 is connected to the output of the driver stage 28. Furthermore, the voltage U+ tapped off before the inverter 27 is present at the counter input of the counter 30. Lines lead from the two outputs of the counter 30 to the two cylinder groups of a four-cylinder engine. This circuit is used to obtain a synchronous pulse in order to enable an exact assignment of the position of the transmitter wheel to the respective rotation of the shaft already when the internal combustion engine starts. This principle of evaluation can of course be used for all engines with an even number of cylinders. With asymmetrical engines, care must be taken that the asymmetry occurs within one revolution of the crankshaft.
EP19870904848 1986-09-05 1987-08-08 Vorrichtung zum steuern einer brennkraftmaschine Expired - Lifetime EP0280696B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630272 1986-09-05
DE19863630272 DE3630272A1 (de) 1986-09-05 1986-09-05 Vorrichtung zum steuern einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0280696A1 EP0280696A1 (de) 1988-09-07
EP0280696B1 true EP0280696B1 (de) 1991-10-16

Family

ID=6308991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870904848 Expired - Lifetime EP0280696B1 (de) 1986-09-05 1987-08-08 Vorrichtung zum steuern einer brennkraftmaschine

Country Status (5)

Country Link
US (1) US4848298A (ja)
EP (1) EP0280696B1 (ja)
JP (1) JPH01500682A (ja)
DE (2) DE3630272A1 (ja)
WO (1) WO1988001691A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922859A1 (de) * 1989-07-12 1991-01-24 Bosch Gmbh Robert Verfahren zur steuerung der kraftstoffzumessung in eine brennkraftmaschine
DE3928726A1 (de) * 1989-08-30 1991-03-07 Vogt Electronic Ag Zuendsystem mit stromkontrollierter halbleiterschaltung
JP2853300B2 (ja) * 1990-08-24 1999-02-03 国産電機株式会社 内燃機関の気筒判別用信号発生装置
DE4039062C1 (ja) * 1990-12-07 1992-06-04 Vogt Electronic Ag, 8391 Obernzell, De
JP3053254B2 (ja) * 1991-05-17 2000-06-19 三信工業株式会社 エンジンの点火時期調整装置
DE19808744A1 (de) * 1998-03-02 1999-05-12 Bosch Gmbh Robert Vorrichtung zum Steuern einer Brennkraftmaschine
US6188216B1 (en) 1998-05-18 2001-02-13 Cts Corporation Low profile non-contacting position sensor
US6124709A (en) * 1998-06-05 2000-09-26 Cts Corporation Magnetic position sensor having a variable width magnet mounted into a rotating disk and a hall effect sensor
US6323641B1 (en) 1999-05-13 2001-11-27 Cts Corporation Non-contacting position sensor with helical flux linkage
US6404185B1 (en) 1999-06-01 2002-06-11 Cts Corporation Apparatus and method for sensing an angular position of a flux linkage member

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1209361B (de) * 1962-09-18 1966-01-20 Philips Patentverwaltung Vorrichtung zur drehzahlabhaengigen Zuendzeit-punkteinstellung bei Brennkraftmaschinen
US3465739A (en) * 1967-10-16 1969-09-09 Phelon Co Inc Inductively triggered breakerless ignition system with automatic spark advance
DE2726132A1 (de) * 1977-06-10 1978-12-21 Bosch Gmbh Robert Winkelsignalgeber fuer rotierende teile
DE2923425A1 (de) * 1979-06-09 1980-12-11 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen
DE3131121C2 (de) * 1981-08-06 1984-11-15 Atlas Fahrzeugtechnik GmbH, 5980 Werdohl Zahnkranz mit einem markierten Zahnkopf
EP0124239A3 (en) * 1983-04-05 1986-01-15 LUCAS INDUSTRIES public limited company Dwell control for an i.c. engine spark ignition system

Also Published As

Publication number Publication date
DE3630272A1 (de) 1988-03-17
EP0280696A1 (de) 1988-09-07
WO1988001691A1 (en) 1988-03-10
DE3773901D1 (ja) 1991-11-21
US4848298A (en) 1989-07-18
JPH01500682A (ja) 1989-03-09

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