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DE10256574A1 - Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track - Google Patents

Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track Download PDF

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Publication number
DE10256574A1
DE10256574A1 DE10256574A DE10256574A DE10256574A1 DE 10256574 A1 DE10256574 A1 DE 10256574A1 DE 10256574 A DE10256574 A DE 10256574A DE 10256574 A DE10256574 A DE 10256574A DE 10256574 A1 DE10256574 A1 DE 10256574A1
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Prior art keywords
code
tracks
dual
internal combustion
combustion engine
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34776—Absolute encoders with analogue or digital scales
    • G01D5/34792—Absolute encoders with analogue or digital scales with only digital scales or both digital and incremental scales
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • G01D5/2497—Absolute encoders

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The angle generator has hub plate (1), in which is fitted shaft (3) rotating at crankshaft speed. On shaft is secured code disc (9), containing dual code tracks (14) as well as fine perforation track (13).The code tracks are illuminated, e.g. by LEDs and scanned by light-sensitive components, e.g. photo-transistors (FT) (5), while light spot through perforated plate in front of FTs is limited by the perforated plate. The dual tracks of code disc transmit angular position to control apparatus in rough steps for synchronizing all counters.

Description

Die Erfindung betrifft einen Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors und sein Zusammenwirken mit einer zentralen MotorelektronikThe invention relates to an angle encoder for example to control an internal combustion engine and its interaction with central engine electronics

Bekannt sind verschiedene Geberprinzipien, die entweder zu ungenau sind, zu viele Codespuren benötigen oder keine absolute Winkelstellung ermitteln.Various donor principles are known which are either too imprecise, need too many code tracks or do not determine an absolute angular position.

Zudem benötigen sie die übliche mechanische 2:1 Untersetzung, um die Funktion der Nockenwelle nachzubilden.They also need the usual mechanical 2: 1 reduction to simulate the function of the camshaft.

Der Erfindung liegt die Aufgabe zugrunde, eine kostengünstige, betriebssichere Lösung zu finden, die zudem das Problem der 2:1 Untersetzung elektronisch löst mit einem weiteren Vorteil, bezüglich des Anlassens des Verbrennungsmotors.The invention has for its object a cost, reliable solution to find that also the problem of 2: 1 gear reduction electronically solves with another advantage regarding starting the internal combustion engine.

Erfindungsgemäß ist ein Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors so ausgeführt, daß in einer Nabenplatte 1 eine Welle 3 gelagert ist, die mit der Kurbelwellendrehzahl umläuft und an der eine Codescheibe 9 befestigt ist, die sowohl duale Codespuren 14 als auch eine feinteilige Perforierungspur 13 enthält,
Weiterhin erfindungsgemäß werden die Codespuren beispielsweise von LED's beleuchtet und von lichtempfindlichen Bauelementen (Fototransistoren) ausgelesen, wobei der Lichtfleck durch eine vor den FT angeordnete Lochplatte begrenzt wird,
Weiterhin erfindungsgemäß wird ein Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors so ausgeführt, daß, die dualen Spuren 14 der Codescheibe 9 die Winkelstellung absolut aber relativ grob gestuft dem Steuergerät übergeben, welches beim Nulldurchgang alle Zähler synchronisiert sowie einen realen oder softwaremäßigen Umschalter einmal ein und beim nächsten Nulldurchgang ausschaltet, und so quasi die 2:1 Untersetzung einer fiktiven Nockenwelle nachbildet,
Weiterhin erfindungsgemäß wird der genannte Umschalter, der als virtuelle Nockenwelle in Verbindung mit der erfindungsgemäßen Codescheibe die Reihenfolge der Arbeitstakte bestimmt, beim Anlassen so gestellt, daß möglichst viele Zylinder mit dem Ansaugvorgang beginnen und so den Anlaßvorgang verkürzt wird.According to the invention, an angle encoder, for example for controlling an internal combustion engine, is designed such that in a hub plate 1 a wave 3 is mounted, which rotates at the crankshaft speed and on which a code disc 9 is attached to both dual code tracks 14 as well as a finely divided perforation track 13 contains
Furthermore, according to the invention, the code tracks are illuminated, for example, by LEDs and read out by light-sensitive components (phototransistors), the light spot being limited by a perforated plate arranged in front of the FT,
Furthermore, according to the invention, an angle encoder, for example for controlling an internal combustion engine, is designed so that the dual tracks 14 the code disc 9 The absolute but relatively coarse angular position is transferred to the control unit, which synchronizes all counters at the zero crossing and switches a real or software switch on and off at the next zero crossing, thus simulating the 2: 1 reduction of a fictitious camshaft,
Furthermore, according to the invention, the switch mentioned, which determines the sequence of the work cycles as a virtual camshaft in connection with the code disk according to the invention, is set when starting so that as many cylinders as possible begin the intake process and the starting process is thus shortened.

Beispiel:Example:

Die Erfindung soll am nachfolgendem Beispiel erläutert werden:The invention is intended to be as follows Example explained become:

Auf 1 sind dargestellt:
1 – Nabenplatte,
2 – Kugellager,
3 – Welle,
4 – Platine für Fototransistoren (FT),
5 – Fototransistoren für die Code-Spuren 0 bis 4,
6 – Fototransistor für die Perforierungsspur,
7 – Platine für die Lichtemmissionsdioden (LED),
8 – LED's für die Code-Spuren 0 bis 4,
9 – rotiernde Code-Scheibe für Gray- und Perforierungscode,
10 – Scheibe mit Lochblenden,
11 – LED für die Perforierungsspur,
12 – Schrauben, Muttern, Distanzhülsen,
13 – Perforierungscode,
14 – digitale Codespuren 0...4,
15 – Radiale Anordnung der LED's, FT und Lochblenden für die Codespuren
16 – Radiale Anordnung der LED's, FT und Lochblenden bei Winkelversatz einiger Codespuren,
17 – Versatzwinkel der Codespuren 1 und 3,
18 – Radiale Anordnung der LED's, FT und Lochblenden für die Perforierungspur.On 1 are shown:
1 - hub plate,
2 - Ball-bearing,
3 - Wave,
4 - PCB for photo transistors (FT),
5 - photo transistors for code tracks 0 to 4,
6 - Photo transistor for the perforation track,
7 - circuit board for the light emission diodes (LED),
8th - LEDs for code tracks 0 to 4,
9 - rotating code disk for gray and perforation code,
10 - disc with pinholes,
11 - LED for the perforation track,
12 - screws, nuts, spacers,
13 - perforation code,
14 - digital code tracks 0 ... 4,
15 - Radial arrangement of the LED's, FT and pinhole for the code tracks
16 - radial arrangement of the LED's, FT and pinhole with angular misalignment of some code tracks,
17 - Code track offset angle 1 and 3 .
18 - Radial arrangement of the LEDs, FT and perforated screens for the perforation track.

In einer Nabenplatte 1 sind die Kugellager 2 befestigt, in denen die Welle 3 gelagert ist. Diese Welle 3 dreht sich mit der Kurbelwellendrehzahl.In a hub plate 1 are the ball bearings 2 attached in which the shaft 3 is stored. This wave 3 rotates at the crankshaft speed.

An ihr ist die Codescheibe 9 befestigt, auf die sowohl die 4 Spuren 14 für den digitalen absoluten Code als auch den Perforierungscodspur 13 aufgedruckt sind.The code disc is on it 9 attached to both the 4 tracks 14 for the digital absolute code as well as the perforation code track 13 are printed.

Über Distanzhülsen und Schrauben 12 sind die Platine 7 für die LED's, die Platine 4 für die FT als auch die Lochblendenplatine 10 befestigt.Via spacers and screws 12 are the circuit board 7 for the LEDs, the circuit board 4 for the FT as well as the pin board 10 attached.

Die LED's 8 und 11 beleuchten die Spuren 14 und 13 der Codescheibe 9, ihr Leuchtfleck wird durch die Lochmaskenplatine 10 begrenzt und von den FT 5 und 6 der FT-Platine erfaßt und ausgewertet.The LED's 8th and 11 illuminate the tracks 14 and 13 the code disc 9 , your light spot is through the shadow mask board 10 limited and by the FT 5 and 6 the FT board recorded and evaluated.

Im vorliegendem Beispiel geben die 5 Codespuren zunächst nach dem Startvorgang eine absolute Kurbelwellen-Winkelangabe mit der Teilung von 360 Grad/32 = 11,3 Grad.In the present example, the 5 code tracks first an absolute crankshaft angle specification after starting the division of 360 degrees / 32 = 11.3 degrees.

Da dies für die notwendigen Stellvorgänge zu grob ist, wird zusätzlich die Perforierungsspur mit einer Teilung von 128 ausgelesen., die eine Teilung von 360/128 = 2,81 Grad bringt, die noch durch Interpolation weiter verfeinert wird, um die notwendigen präzisen Steuerzeitpunkte für die Zündung und die Ventilbetätigung errechnen zu können.As this is too rough for the necessary adjustment processes is, is additional read the perforation track with a pitch of 128, the a division of 360/128 = 2.81 degrees, which is still by interpolation is further refined to the necessary precise timing for the ignition and the valve actuation to be able to calculate.

Eine mit halber KW-Drehzahl umlaufende Nockenwelle gibt es nicht.A camshaft rotating at half the KW speed there is not any.

Beim Nulldurchgang der Codescheiben wird ein elektronischer Schalter hin und her geschaltet.At the zero crossing of the code disks an electronic switch is switched back and forth.

Seine Schaltstellung bestimmt, welcher Zyklus (beispielsweise Kompression oder Ladungswechsel) ausgeführt wird.Its switch position determines which one Cycle (for example compression or charge change) is carried out.

Dieser Schalter kann real als Flip-Flop ausgeführt oder fiktiv im Rechner programmiert und interruptgesteuert sein.This switch can actually be a flip-flop accomplished or fictitiously programmed in the computer and interrupt-controlled.

Beim Starvorgang werden die Codespuren C0 bis C4 ausgelesen. An Hand der so ermittelten Kurbelwellenstellung wird entschieden, in welche Anfangsstellung der Flip-Flop geschaltet wird. Um den Startvorgang zu verkürzen, wird dieser Flip-Flop-Schalter zunächst so gestellt, daß möglichst viele Zylinder mit dem Ansaugtakt beginnen.When starting, the code tracks become C0 read out to C4. Using the crankshaft position determined in this way it is decided in which initial position the flip-flop is switched becomes. To shorten the start-up process, this flip-flop switch first so that if possible many cylinders start the intake stroke.

Auf 2 ist der Verlauf der Codespuren C0...C4 eines Gray-Codes, der (vergröbert dargestellte) Perforierungscode P und eine mögliche Stellung FF des Flip-Flop dargestellt.On 2 is the course of the code traces C0 ... C4 of a Gray code, the (roughly shown) perforation code P and a possible position FF of the flip-flop.

Auf 3 ist die zugeordnete Kurbelwellenstellung ebenfalls über 2 Umläufe zu erkennen.On 3 is the assigned crankshaft position can also be recognized over 2 rounds.

Claims (4)

Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors dadurch gekennzeichnet, daß in einer Nabenplatte 1 eine Welle 3 gelagert ist, die mit der Kurbelwellendrehzahl. umläuft und an der eine Codescheibe 9 befestigt ist, die sowohl duale Codespuren 14 als auch eine feinteilige Perforierungsspur 13 enthält,Angle encoder, for example for controlling an internal combustion engine, characterized in that in a hub plate 1 a wave 3 is stored with the crankshaft speed. revolves around and on a code disc 9 is attached to both dual code tracks 14 as well as a fine perforation track 13 contains Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors nach Anspruch 1 dadurch gekennzeichnet, daß die Codespuren beispielsweise von LED's beleuchtet und von lichtempfindlichen Bauelementen (Fototransistoren) ausgelesen werden, wobei der Lichtfleck durch eine vor den FT angeordnete Lochplatte begrenzt wird,Angle encoder, for example, for controlling an internal combustion engine according to claim 1, characterized in that the code tracks, for example from LED's illuminated and read out by light-sensitive components (photo transistors) the light spot through a perforated plate arranged in front of the FT is limited Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors nach Anspruch 1 und 2 dadurch gekennzeichnet, daß die dualen Spuren 14 der Codescheibe 9 die Winkelstellung absolut aber relativ grob gestuft dem Steuergerät übergeben, welches beim Nulldurchgang alle Zähler synchronisiert sowie einen realen oder softwaremäßigen Umschalter einmal ein und beim nächsten Nulldurchgang ausschaltet, und so quasi die 2:1 Untersetzung einer fiktiven Nockenwelle nachbildet,Angle encoder, for example for controlling an internal combustion engine according to claim 1 and 2, characterized in that the dual tracks 14 the code disc 9 The absolute but relatively coarse angular position is transferred to the control unit, which synchronizes all counters at the zero crossing and switches a real or software switch on and off at the next zero crossing, thus simulating the 2: 1 reduction of a fictitious camshaft, Winkelgeber beispielsweise zur Steuerung eines Verbrennungsmotors nach Anspruch 1 bis 3 dadurch gekennzeichnet, daß der unter Anspruch 3 genannte Umschalter die Reihenfolge der Arbeitstakte bestimmt und beim Anlassen so gestellt wird, daß möglichst viele Zylinder mit dem Ansaugvorgang beginnen.Angle encoder, for example, for controlling an internal combustion engine according to claims 1 to 3, characterized in that the one mentioned in claim 3 Switches determine the order of the work cycles and when starting is placed so that if possible many cylinders start the intake process.
DE10256574A 2002-12-04 2002-12-04 Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track Withdrawn DE10256574A1 (en)

Priority Applications (1)

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DE10256574A DE10256574A1 (en) 2002-12-04 2002-12-04 Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track

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DE10256574A DE10256574A1 (en) 2002-12-04 2002-12-04 Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track

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DE10256574A1 true DE10256574A1 (en) 2004-06-17

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DE10256574A Withdrawn DE10256574A1 (en) 2002-12-04 2002-12-04 Angle generator, e.g. for IC engine control and for its contacting with central engine electronic system with hub plate, bearing shaft turning at crankshaft speed and locating code disc with both dual code tracks and fine perforation track

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102582767A (en) * 2011-01-13 2012-07-18 上海翌威科技有限公司 Crank position data conversion device of power bicycle
DE102011109269B3 (en) * 2011-08-03 2012-11-29 Maschinenfabrik Reinhausen Gmbh Position-reporting arrangement
CN105395136A (en) * 2014-09-15 2016-03-16 江苏美的清洁电器股份有限公司 Dust collector, side brush abnormity detector and control method and device of side brush motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102582767A (en) * 2011-01-13 2012-07-18 上海翌威科技有限公司 Crank position data conversion device of power bicycle
DE102011109269B3 (en) * 2011-08-03 2012-11-29 Maschinenfabrik Reinhausen Gmbh Position-reporting arrangement
CN105395136A (en) * 2014-09-15 2016-03-16 江苏美的清洁电器股份有限公司 Dust collector, side brush abnormity detector and control method and device of side brush motor

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