EP1030044A2 - Device for adapting the torque of an engine torque model - Google Patents

Device for adapting the torque of an engine torque model Download PDF

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Publication number
EP1030044A2
EP1030044A2 EP00100324A EP00100324A EP1030044A2 EP 1030044 A2 EP1030044 A2 EP 1030044A2 EP 00100324 A EP00100324 A EP 00100324A EP 00100324 A EP00100324 A EP 00100324A EP 1030044 A2 EP1030044 A2 EP 1030044A2
Authority
EP
European Patent Office
Prior art keywords
torque
sensor
engine
engine torque
model
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.)
Withdrawn
Application number
EP00100324A
Other languages
German (de)
French (fr)
Other versions
EP1030044A3 (en
Inventor
Bernhard Lechner
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1030044A2 publication Critical patent/EP1030044A2/en
Publication of EP1030044A3 publication Critical patent/EP1030044A3/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F02D2200/1004—Estimation of the output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission

Definitions

  • the invention relates to a device for torque adaptation for an engine torque model according to the preamble of claim 1.
  • Engine torque models for determining engine torques are generally known and are used in engine, transmission and chassis control units.
  • Conventional Engine torque models calculate the engine torque from map and Sensor input variables, such as the motor temperature, the load and / or the Rotational speed.
  • the object of the present invention is therefore a device for torque adaptation for an engine torque model with which the engine torque can be determined exactly.
  • a sensor for determining between a clutch and the drive wheels used on a drive shaft moment is preferably arranged on the output or propeller shaft itself transmits the motor torque occurring on this shaft without contact.
  • a signal generated by the sensor in proportion to the detected output torque is delivered to a control device and is used to adapt the from the Model of certain engine torque.
  • the accuracy of the engine torque can be considerably increased increase so that only deviations of up to 2% occur in stationary operation and result in up to 5% in transient operation.
  • FIG. 1 shows a block diagram of an internal combustion engine 10, to which a clutch 12 is connected directly.
  • the clutch has an output shaft 14 on the output side, on which a torque detection sensor, in the present case a strain gauge 16, is arranged.
  • a torque detection sensor in the present case a strain gauge 16
  • receivers 18 are arranged which, depending on the load on the strain gauge in the torsion direction, generate or receive a corresponding signal without contact and transmit it to a CAN bus 20 as the signal Md Antr .
  • various control devices are connected to the CAN bus, namely a digital engine electronics (DME) 22, an electrical transmission control (EGS) 24 and a traction control (ASC) 26.
  • DME digital engine electronics
  • EVS electrical transmission control
  • ASC traction control
  • the torque output by the sensor receiver unit 16/18 is Md drive recorded and taken into account decentrally when determining an actual engine torque.
  • an engine torque Md Mod is first determined from a model. This engine torque is read from a map in which the torque is plotted against the speed n and the load. The engine torque Md Mod determined in this way is then corrected via a torque comparison using the signal Md Antr and results decentrally in the aforementioned controls 22, 24 and 26 a corrected model torque Md Korr , which has a significantly smaller deviation from the actual engine torque than has been the case up to now is.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

Connected directly to an internal combustion engine (10), a clutch (12) has a driven shaft on its drive side fitted with a torque detection sensor, including an expansion measurement strip (16). Receivers (18), fitted opposite this strip to generate without contact a corresponding signal after loading the strip in a torsion direction, receive this and transmit it as a signal (MdAntr) to a CAN bus (20).

Description

Die Erfindung betrifft eine Vorrichtung zur Drehmomentadaption für ein Motormomentenmodell gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for torque adaptation for an engine torque model according to the preamble of claim 1.

Motormomentenmodelle zur Ermittlung von Motormomenten sind allgemein bekannt und werden in Motor-, Getriebe- und Fahrwerkssteuergeräten verwendet. Herkömmliche Motormomentenmodelle errechnen das Motormoment aus Kennfeld- und Sensoreingangsgrößen, wie der Motortemperatur, der Last- und/oder der Drehzahl.Engine torque models for determining engine torques are generally known and are used in engine, transmission and chassis control units. Conventional Engine torque models calculate the engine torque from map and Sensor input variables, such as the motor temperature, the load and / or the Rotational speed.

Was jedoch in bisherige Modelle, insbesondere als Sensorgröße, nicht einfließt, ist das nach einer Trennkupplung im Antriebsstrang anliegende Abtriebsmoment.However, what is not included in previous models, especially as a sensor size, is the output torque present in the drive train after a disconnect clutch.

Durch die rein modellmäßige Berechnung des Motormoments kann es vorkommen, daß dieses Motormoment aufgrund von Leistungstoleranzen bei Serienmotoren um bis zu 20 % vom tatsächlichen Motormoment abweicht. Da die Motormomente in den einzelnen Getriebesteuergeräten jedoch als Eingangsgrößen für Regelungs- oder Steuervorgänge verwendet werden, werden damit natürlich auch die entsprechenden Motor-, Getriebe- und Fahrwerksregelungen bzw. -steuerungen unsauber. Due to the purely model-based calculation of the engine torque, that this engine torque due to performance tolerances in series engines deviates up to 20% from the actual engine torque. Since the engine torque in the individual gearbox control units, however, as input variables for control or Control processes are used, of course, the corresponding engine, transmission and chassis controls unclean.

Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung zur Drehmomentadaption für ein Motormomentenmodell anzugeben, mit der das Motormoment genau bestimmt werden kann.The object of the present invention is therefore a device for torque adaptation for an engine torque model with which the engine torque can be determined exactly.

Diese Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in claim 1.

Insbesondere wird ein Sensor zur Bestimmung des zwischen einer Kupplung und den Antriebsrädern auf einer Antriebswelle anliegenden Momentes verwendet. Der Sensor ist vorzugsweise auf der Abtriebs- oder Kardanwelle selbst angeordnet und überträgt das an dieser Welle auftretende Motormoment berührungsfrei.In particular, a sensor for determining between a clutch and the drive wheels used on a drive shaft moment. The Sensor is preferably arranged on the output or propeller shaft itself transmits the motor torque occurring on this shaft without contact.

Ein von dem Sensor proportional zum erfaßten Abtriebsmoment erzeugtes Signal wird an eine Steuereinrichtung abgegeben und dient zur Adaption des aus dem Modell bestimmten Motormoments.A signal generated by the sensor in proportion to the detected output torque is delivered to a control device and is used to adapt the from the Model of certain engine torque.

Mit der vorgenannten Adaption läßt sich die Genauigkeit des Motormoments erheblich erhöhen, so daß sich im stationären Betrieb nur Abweichungen um bis zu 2 % und im instationärem Betrieb um bis zu 5 % ergeben.With the aforementioned adaptation, the accuracy of the engine torque can be considerably increased increase so that only deviations of up to 2% occur in stationary operation and result in up to 5% in transient operation.

Insgesamt verbessert sich also die Genauigkeit des bestimmten Motormoments und damit die Genauigkeit der damit betriebenen Steuergeräte, beispielsweise die Schaltgenauigkeit bei Automatikgetrieben (auch bei Halbautomatikgetrieben) und die Regelgenauigkeit von Fahrwerkseinrichtungen, wie sie insbesondere bei aktivem Bremseingriff zum Tragen kommen. Als Folge läßt sich auch die Fahrzeugsicherheit erhöhen. Darüber hinaus ist ein genaues Motormoment auch bei zukünftigen Motorenkonzepten wie einem variablen Ventiltrieb und einem Benzindirekteinspritzmotor von großem Vorteil.Overall, the accuracy of the specific engine torque and improves thus the accuracy of the control devices operated with it, for example the Shifting accuracy in automatic transmissions (also in semi-automatic transmissions) and the control accuracy of undercarriage equipment, as is the case with active brake intervention come into play. As a result, the Increase vehicle safety. In addition, an accurate engine torque is also with future engine concepts such as a variable valve train and one Direct petrol injection engine is a great advantage.

Eine einfache Ausführungsform einer erfindungsgemäßen Vorrichtung wird nachfolgend mit Bezug auf die beiliegenden Zeichnungen näher erläutert. Die Zeichnungen zeigen in

Figur 1
ein stark schematisiertes Blockdiagramm einer erfindungsgemäßen Vorrichtung und
Figur 2
ein Verfahren zur Momentenadaption in erfindungsgemäßer Weise.
A simple embodiment of a device according to the invention is explained in more detail below with reference to the accompanying drawings. The drawings show in
Figure 1
a highly schematic block diagram of a device according to the invention and
Figure 2
a method for torque adaptation in the manner according to the invention.

In Figur 1 ist in schematischer Weise ein Verbrennungsmotor 10 in Blockdarstellung gezeigt, an welchen direkt eine Kupplung 12 angeschlossen ist. Die Kupplung weist abtriebsseitig eine Abtriebswelle 14 auf, an der ein Momentenerfassungssensor, vorliegend ein Dehnmeßstreifen 16, angeordnet ist. Radial gegenüberliegend dem Dehnmeßstreifen 16 sind Empfänger 18 angeordnet, die je nach Belastung des Dehnmeßstreifens in Torsionsrichtung ein entsprechendes Signal berührungslos erzeugen bzw. empfangen und als Signal MdAntr auf einen CAN-Bus 20 geben.FIG. 1 shows a block diagram of an internal combustion engine 10, to which a clutch 12 is connected directly. The clutch has an output shaft 14 on the output side, on which a torque detection sensor, in the present case a strain gauge 16, is arranged. Radially opposite the strain gauge 16, receivers 18 are arranged which, depending on the load on the strain gauge in the torsion direction, generate or receive a corresponding signal without contact and transmit it to a CAN bus 20 as the signal Md Antr .

An den CAN-Bus sind vorliegend verschiedene Steuergeräte angeschlossen, nämlich eine digitale Motorelektronik (DME) 22, eine elektrische Getriebesteuerung (EGS) 24 und eine Antriebsschlupfkontrolle (ASC) 26. In allen Steuergeräten wird das von der Sensor-Empfängereinheit 16/18 abgegebene Moment MdAntr aufgenommen und bei der Ermittlung eines tatsächlichen Motormoments dezentral berücksichtigt.In the present case, various control devices are connected to the CAN bus, namely a digital engine electronics (DME) 22, an electrical transmission control (EGS) 24 and a traction control (ASC) 26. In all control devices, the torque output by the sensor receiver unit 16/18 is Md drive recorded and taken into account decentrally when determining an actual engine torque.

Gemäß Figur 2 ist zu erkennen, daß zunächst ein Motormoment MdMod aus einem Modell bestimmt wird. Dieses Motormoment wird aus einem Kennfeld ausgelesen, in dem vorliegend das Moment über der Drehzahl n und der Last aufgetragen ist. Das so ermittelte Motormoment MdMod wird dann über einen Momentenabgleich unter Verwendung des Signals MdAntr korrigiert und ergibt dezentral in den vorgenannten Steuerungen 22, 24 und 26 ein korrigiertes Modellmoment MdKorr, welches eine wesentlich geringere Abweichung vom tatsächlichen Motormoment aufweist als dies bisher der Fall ist.According to FIG. 2 it can be seen that an engine torque Md Mod is first determined from a model. This engine torque is read from a map in which the torque is plotted against the speed n and the load. The engine torque Md Mod determined in this way is then corrected via a torque comparison using the signal Md Antr and results decentrally in the aforementioned controls 22, 24 and 26 a corrected model torque Md Korr , which has a significantly smaller deviation from the actual engine torque than has been the case up to now is.

Insgesamt läßt sich mit oben beschriebenen Vorgehensweisen das Motormoment in adaptiver Weise an das tatsächliche Moment anpassen und sehr genau ermitteln.Overall, the engine torque in can be described using the procedures described above adaptively adapt to the actual moment and determine very precisely.

Claims (4)

Vorrichtung zur Drehmomentadaption, bei der zumindest eine Berechnungseinheit vorgesehen ist, die aus Kennfeld- und/oder Sensoreingangsgrößen, wie der Motortemperatur, der Last oder der Motordrehzahl, und anhand eines Motormomentenmodells ein Motormoment ermittelt,
dadurch gekennzeichnet,
daß ein Sensor zur Erfassung eines an einer zwischen einer Kupplung des Verbrennungsmotor und den angetriebenen Rädern angeordneten Abtriebswelle anliegenden Moments vorgesehen ist, der Sensor ein dem Moment entsprechendes Signal für die zumindest eine Berechnungseinheit erzeugt und die Berechnungseinheit derart ausgebildet ist, daß das aus dem Modell ermittelte Motormoment in Abhängigkeit von dem erfaßten Moment korrigierbar ist.Device for torque adaptation, in which at least one calculation unit is provided, which determines an engine torque from map and / or sensor input variables, such as the engine temperature, the load or the engine speed, and on the basis of an engine torque model,
characterized,
that a sensor is provided for detecting a torque applied to an output shaft arranged between a clutch of the internal combustion engine and the driven wheels, the sensor generates a signal corresponding to the torque for the at least one calculation unit, and the calculation unit is designed such that that determined from the model Engine torque depending on the detected torque is correctable. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß der Sensor auf der Abtriebswelle der Kupplung oder der Kardanwelle angeordnet ist. Method according to claim 1,
characterized,
that the sensor is arranged on the output shaft of the clutch or the cardan shaft. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Sensor derart ausgeführt ist, um das Sensorsignal berührungsfrei abzugreifen.The method of claim 1 or 2,
characterized,
that the sensor is designed to tap the sensor signal without contact. Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß als Teil des Sensors auf der Abtriebswelle ein Dehnmeßstreifen verwendet wird.Method according to one of claims 1 to 3,
characterized,
that a strain gauge is used as part of the sensor on the output shaft.
EP00100324A 1999-02-16 2000-01-07 Device for adapting the torque of an engine torque model Withdrawn EP1030044A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19906416A DE19906416A1 (en) 1999-02-16 1999-02-16 Torque adaptation device for engine torque model
DE19906416 1999-02-16

Publications (2)

Publication Number Publication Date
EP1030044A2 true EP1030044A2 (en) 2000-08-23
EP1030044A3 EP1030044A3 (en) 2002-12-04

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EP00100324A Withdrawn EP1030044A3 (en) 1999-02-16 2000-01-07 Device for adapting the torque of an engine torque model

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US (1) US6419609B1 (en)
EP (1) EP1030044A3 (en)
JP (1) JP2000234557A (en)
DE (1) DE19906416A1 (en)

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US6704638B2 (en) * 2002-06-26 2004-03-09 General Motors Corporation Torque estimator for engine RPM and torque control
DE102004041072B4 (en) 2003-12-19 2019-03-21 Fka Forschungsgesellschaft Kraftfahrwesen Mit Beschränkter Haftung, Aachen Method for vehicle control
AU2004201718B1 (en) * 2004-04-27 2005-02-24 Larry Lin Feng Weng Engine optimisation method and apparatus
US7307517B2 (en) * 2005-08-05 2007-12-11 Honeywell International Inc. Wireless torque sensor
DE102006052623A1 (en) * 2006-11-08 2008-05-15 Bayerische Motoren Werke Ag Vehicle with a gearbox with torque measuring device
US8108096B2 (en) 2009-02-27 2012-01-31 GM Global Technology Operations LLC Diagnostic systems and methods for a torque sensor
US20210229668A1 (en) * 2020-01-27 2021-07-29 Tusimple, Inc. Adaptive brake mode selection

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EP0559342A2 (en) * 1992-03-02 1993-09-08 Hitachi, Ltd. A method and an apparatus for controlling a car equipped with an automatic transmission having a lockup clutch
US5785627A (en) * 1994-02-14 1998-07-28 Hitachi, Ltd. Torque feedback shift control device and method
US5801644A (en) * 1994-11-14 1998-09-01 Ruthroff; Clyde L. Apparatus for measurement of torque on a rotating shaft

Also Published As

Publication number Publication date
EP1030044A3 (en) 2002-12-04
DE19906416A1 (en) 2000-08-17
US6419609B1 (en) 2002-07-16
JP2000234557A (en) 2000-08-29

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