EP2689144A2 - Valve control device for a vehicle - Google Patents

Valve control device for a vehicle

Info

Publication number
EP2689144A2
EP2689144A2 EP12709591.7A EP12709591A EP2689144A2 EP 2689144 A2 EP2689144 A2 EP 2689144A2 EP 12709591 A EP12709591 A EP 12709591A EP 2689144 A2 EP2689144 A2 EP 2689144A2
Authority
EP
European Patent Office
Prior art keywords
valve
control device
actuator
control unit
vehicle
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
EP12709591.7A
Other languages
German (de)
French (fr)
Other versions
EP2689144B1 (en
Inventor
Markus Schober
Andreas Wehle
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP2689144A2 publication Critical patent/EP2689144A2/en
Application granted granted Critical
Publication of EP2689144B1 publication Critical patent/EP2689144B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B13/0444—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with rotary electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/002—Calibrating

Definitions

  • the invention relates to a valve control device for a vehicle, in particular an agricultural utility vehicle, with a control unit for controlling an electromagnetically operable valve, wherein the control unit interrogates upon activation of a Doublekalibri fürsmodus a the electromagnetically actuated valve associated identification feature, determines the queried identifier corresponding valve type, and a selects the control valve associated with the determined valve type for controlling the electromagnetically operable valve.
  • valve control device in the form of a system for identifying the configuration of a valve carrier system which can be equipped with different valves has been presented, for example, by Bosch Rexroth at the Hannover Messe in 2009.
  • the valve support system has a plurality of base plates for receiving the valves, wherein each of the base plates carries an antenna by means of which an RFID transponder associated with the respective valve can be read out.
  • Each of the RFID transponders transmits a dataset which is characteristic of the respective valve type, so that a direct inference to the current configuration of the valve carrier system is possible. Due to the use of RFID-based data query the known valve control device is relatively expensive in construction. It is therefore an object of the present invention to form a valve control device of the type mentioned in the sense of reducing the structural complexity.
  • the valve control device for a vehicle comprises a control unit for controlling an electromagnetically operable valve, wherein the control unit interrogates an identification feature associated with the electromagnetically operable valve upon activation of a self-calibration mode, determines a valve type corresponding to the retrieved identification feature, and a valve type determined assigned control algorithm for controlling the electromagnetically operable valve selects.
  • the identification feature is a characteristic travel of an actuating unit provided for the electromagnetic actuation of the valve.
  • the actuating unit can be designed, for example, as an electrically controllable actuator in the form of a stepping motor, which is connected via an associated drive mechanism to a valve slide assigned to the valve.
  • the valve slide which is guided in a valve block, can be moved into various positions by means of the actuator, with each of the positions corresponding to a specific valve position.
  • the travel to be traversed by the valve spool between the various positions is characteristic of the present invention. This type of valve allows its unique identification.
  • the determination of the characteristic travel itself is not subject to any special requirements. If the actuator is a stepping motor, then the characteristic travel can be derived directly from the number of steps required by the stepping motor for complete travel through the travel. Additionally or alternatively, however, the use of a position sensor detecting the travel position is conceivable.
  • the valve control device not only simplifies an initial configuration of a hydraulic system provided in a vehicle in the case of a plurality of available valve options, but also a later replacement of the valve type during maintenance or revision work.
  • the various valve types and their associated identification features or control algorithms are hereby stored in a table in a memory device associated with the control unit.
  • the self-calibration mode is exited and the valve control device is placed in a normal operating mode provided for normal operation of the hydraulic system.
  • the control unit determines the characteristic travel based on predetermined reference positions of the actuator unit included actuator.
  • the actuator may be a rack connected to the valve spool that is in engagement with a gear drive of the stepper motor.
  • the rack and the one or more gears consisting of gear drive are part of the drive mechanism included by the actuator.
  • Each of the reference positions of the actuator corresponds to a specific valve position.
  • Actuator and valve spool are releasably connected to each other by means of a splint or the like, but can also be designed as a structural unit.
  • the predetermined reference positions are in particular formed by one or more mechanical limit stops and / or a defined neutral position of the actuating transmitter and / or the valve slide connected to the actuating transmitter.
  • the characteristic travel of the valve results directly from between the two end stops or from between at least one of the end stops and the defined neutral position of the actuator and / or valve slide to be traversed actuating travel.
  • the control unit recognizes the achievement of the mechanical end stops by detecting a load increase occurring at the setting unit.
  • the load increase can be determined, for example, on the basis of an increasing current requirement of the stepping motor when the end stop is reached.
  • the vehicle is an unillustrated agricultural utility vehicle, in particular a tractor, a harvesting machine, a forage harvester or the like.
  • the valve control device 10 arranged in the agricultural utility vehicle comprises a control unit 12 for controlling an electromagnetically operable valve 14 and an actuating unit 18 in communication with the control unit 12 via a control line 16.
  • the control unit 18 is, for example, an electrically controllable actuator in the form of a stepper motor 20 formed, which is connected via an associated drive mechanism 22 with a valve 14 associated with valve slide 26 in conjunction.
  • Stepper motor 20 and drive mechanism 22 are housed in a common housing 24.
  • the valve slide 26, which is guided in a valve block 28, can be moved into different positions by means of the stepping motor 20, wherein each of the positions corresponds to a specific valve position.
  • the travel to be traversed by the valve spool 26 between the various positions is characteristic of the respective valve type, thus allowing its unique identification for the purpose of self-calibration of a hydraulic system equipped therewith.
  • the characteristic table travel a the valve 14 uniquely assigned identification feature.
  • the control unit 12 determines the characteristic travel by means of predetermined reference positions of an actuator 30 encompassed by the actuator 18.
  • the actuator 30 is a rack 32 connected to the valve spool 26 which meshes with a gear drive 34 of the stepper motor 20 stands.
  • the toothed rack 32 and the gearwheel drive 34 consisting of a first and second toothed wheel 36 and 38 are part of the drive mechanism 22 encompassed by the setting unit 18.
  • Each of the reference positions of the actuator 30 here corresponds to a specific valve position.
  • Actuator 30 and valve slide 26 are releasably connected to each other by means of a splint 40 or the like, but may also be designed as a structural unit.
  • the stepping motor 20 may basically also be a linear displacement sensor.
  • rack 32 and gear drive 34 for actuating the valve spool 26 may be omitted.
  • the drive mechanism 22 is then typically formed as a trapezoidal screw driven by the stepper motor 20.
  • the predetermined reference positions are, for example, by a first mechanical end stop 42 of the actuator 30 and a second end stop 44 of the valve spool 26. forms. In this case, the characteristic results
  • the predetermined reference positions can also be formed by a single one of the mechanical end stops 42 or 44 in conjunction with a defined neutral position of the actuating transmitter 30 or valve slide 26.
  • the control unit 12 detects the reaching of the respective mechanical end stop 42 or 44 by detecting a load increase occurring on the setting unit 18.
  • the increase in load is determined by the control unit 12 due to an increasing current requirement of the stepping motor 20 upon reaching the limit stop 42 or 44.
  • the control unit 12 queries the characteristic travel of the valve 14 when activating a self-calibration mode in a first step.
  • the actuation transmitter 30 is moved up to the first mechanical end stop 42 by corresponding activation of the setting unit 18 or of the stepping motor 20 encompassed by the latter.
  • the actuator 30 is moved up to the second mechanical end stop 44.
  • the characteristic travel is derived from the control unit 12 by detecting the number of steps that the stepper motor 20 requires to complete the travel between the two mechanical end stops 40 and 42.
  • the control unit 12 determines in a second step an NEN the requested characteristic travel corresponding valve type. On the basis of this, the control unit 12 finally selects, in a third step, a control algorithm assigned to the determined valve type for actuating the electromagnetically actuatable valve 14.
  • the valve control device 10 not only simplifies an initial configuration of the hydraulic system provided in the agricultural vehicle in the case of a plurality of available valve options, but also a later replacement of the valve type in the context of maintenance or revision work.
  • the various valve types as well as their associated identification features or control algorithms are stored in a tabular form in a memory device 46 assigned to the control unit 12.
  • the self-calibration mode is exited and the valve control device 10 is placed in a normal operating mode provided for normal operation of the hydraulic system.

Abstract

The invention relates to a valve control device (10) for a vehicle, in particular an agricultural commercial vehicle, comprising a control unit (12) for controlling an electromagnetically actuatable valve (14). The control unit (12) requests an identifying feature that is assigned to the electromagnetically actuatable valve (14) when a self-calibrating mode is activated; a valve type that corresponds to the requested identifying feature is ascertained; and a control algorithm that is assigned to the ascertained valve type is selected in order to control the electromagnetically actuatable valve (14). According to the invention, the identifying feature is a characteristic actuating distance of an actuating unit (18) that is provided for electromagnetically actuating the valve (14).

Description

Ventilsteuervorrichtung für ein Fahrzeug  Valve control device for a vehicle
Die Erfindung betrifft eine Ventilsteuervorrichtung für ein Fahrzeug, insbesondere ein landwirtschaftliches Nutzfahrzeug, mit einer Kontrolleinheit zur Ansteuerung eines elektromagnetisch betätigbaren Ventils, wobei die Kontrolleinheit bei Aktivierung eines Selbstkalibrierungsmodus ein dem elektromagnetisch betätigbaren Ventil zugeordnetes Identifikationsmerkmal abfragt, einen dem abgefragten Identifikationsmerkmal entsprechenden Ventiltyp ermittelt, und einen dem ermittelten Ventiltyp zugeordneten Steueralgorithmus zur Ansteuerung des elektromagnetisch betätigbaren Ventils auswählt. The invention relates to a valve control device for a vehicle, in particular an agricultural utility vehicle, with a control unit for controlling an electromagnetically operable valve, wherein the control unit interrogates upon activation of a Selbstkalibrierungsmodus a the electromagnetically actuated valve associated identification feature, determines the queried identifier corresponding valve type, and a selects the control valve associated with the determined valve type for controlling the electromagnetically operable valve.
Eine derartige Ventilsteuervorrichtung in Gestalt eines Systems zur Identifizierung der Konfiguration eines mit unterschiedlichen Ventilen bestückbaren Ventilträgersystems wurde beispielsweise von der Firma Bosch Rexroth auf der Hannover Messe im Jahre 2009 vorgestellt. Das Ventilträgersystem weist eine Vielzahl von Grundplatten zur Aufnahme der Ventile auf, wobei jede der Grundplatten eine Antenne trägt, mittels derer ein dem jeweiligen Ventil zugeordneter RFID-Transponder auslesbar ist. Jeder der RFID-Transponder überträgt hierbei einen für den jeweiligen Ventiltyp charakteristischen Datensatz, sodass ein unmittelbarer Rückschluss auf die derzeitige Bestückung des Ventilträgersystems möglich ist. Aufgrund der Verwendung der RFID-basierten Datenabfrage ist die bekannte Ventilsteuervorrichtung vergleichsweise aufwendig im Aufbau. Es ist daher Aufgabe der vorliegenden Erfindung, eine Ventilsteuervorrichtung der eingangs genannten Art im Sinne einer Verringerung des baulichen Aufwands auszubilden. Such a valve control device in the form of a system for identifying the configuration of a valve carrier system which can be equipped with different valves has been presented, for example, by Bosch Rexroth at the Hannover Messe in 2009. The valve support system has a plurality of base plates for receiving the valves, wherein each of the base plates carries an antenna by means of which an RFID transponder associated with the respective valve can be read out. Each of the RFID transponders transmits a dataset which is characteristic of the respective valve type, so that a direct inference to the current configuration of the valve carrier system is possible. Due to the use of RFID-based data query the known valve control device is relatively expensive in construction. It is therefore an object of the present invention to form a valve control device of the type mentioned in the sense of reducing the structural complexity.
Diese Aufgabe wird durch eine Ventilsteuervorrichtung mit den Merkmalen des Patentanspruchs 1 gelöst. This object is achieved by a valve control device having the features of patent claim 1.
Die Ventilsteuervorrichtung für ein Fahrzeug, insbesondere ein landwirtschaftliches Nutzfahrzeug, umfasst eine Kontrolleinheit zur Ansteuerung eines elektromagnetisch betätigbaren Ventils, wobei die Kontrolleinheit bei Aktivierung eines Selbstkalibrierungsmodus ein dem elektromagnetisch betätigbaren Ventil zugeordnetes Identifikationsmerkmal abfragt, einen dem abgefragten Identifikationsmerkmal entsprechenden Ventiltyp ermittelt, und einen dem ermittelten Ventiltyp zugeordneten Steueralgorithmus zur Ansteuerung des elektromagnetisch betätigbaren Ventils auswählt. Erfindungsgemäß handelt es sich bei dem Identifikationsmerkmal um einen charakteristischen Stellweg einer zur elektromagnetischen Betätigung des Ventils vorgesehenen Stelleinheit. The valve control device for a vehicle, in particular an agricultural utility vehicle, comprises a control unit for controlling an electromagnetically operable valve, wherein the control unit interrogates an identification feature associated with the electromagnetically operable valve upon activation of a self-calibration mode, determines a valve type corresponding to the retrieved identification feature, and a valve type determined assigned control algorithm for controlling the electromagnetically operable valve selects. According to the invention, the identification feature is a characteristic travel of an actuating unit provided for the electromagnetic actuation of the valve.
Die Stelleinheit kann beispielsweise als elektrisch steuerbarer Aktuator in Gestalt eines Schrittmotors ausgebildet sein, der über einen zugehörigen Antriebsmechanismus mit einem dem Ventil zugeordneten Ventilschieber in Verbindung steht. Der in einem Ventilblock geführte Ventilschieber lässt sich mittels des Ak- tuators in verschiedene Positionen verbringen, wobei jede der Positionen einer bestimmten Ventilstellung entspricht. Der von dem Ventilschieber zwischen den verschiedenen Positionen zu durchfahrende Stellweg ist hierbei charakteristisch für den je- weiligen Ventiltyp, erlaubt also dessen eindeutige Identifizierung . The actuating unit can be designed, for example, as an electrically controllable actuator in the form of a stepping motor, which is connected via an associated drive mechanism to a valve slide assigned to the valve. The valve slide, which is guided in a valve block, can be moved into various positions by means of the actuator, with each of the positions corresponding to a specific valve position. The travel to be traversed by the valve spool between the various positions is characteristic of the present invention. This type of valve allows its unique identification.
An die Ermittlung des charakteristischen Stellwegs selbst werden keine besonderen Anforderungen gestellt. Handelt es sich bei dem Aktuator um einen Schrittmotor, so lässt sich der charakteristische Stellweg unmittelbar aus der Anzahl der von dem Schrittmotor zum vollständigen Durchfahren des Stellwegs benötigten Schritte ableiten. Zusätzlich oder alternativ ist jedoch auch die Verwendung eines den Stellweg erfassenden Positionssensors denkbar . The determination of the characteristic travel itself is not subject to any special requirements. If the actuator is a stepping motor, then the characteristic travel can be derived directly from the number of steps required by the stepping motor for complete travel through the travel. Additionally or alternatively, however, the use of a position sensor detecting the travel position is conceivable.
Die erfindungsgemäße Ventilsteuervorrichtung vereinfacht nicht nur eine Erstkonfiguration eines in einem Fahrzeug vorgesehenen Hydrauliksystems für den Fall einer Vielzahl von zur Verfügung stehenden Ventiloptionen, sondern auch einen späteren Austausch des Ventiltyps im Rahmen von Wartungs- oder Revisionsarbeiten. Die verschiedenen Ventiltypen sowie deren zugehörige Identifikationsmerkmale bzw. Steueralgorithmen sind hierbei tabellarisch in einer der Kontrolleinheit zugeordneten Speichereinrichtung abgelegt. Nach abgeschlossener Konfiguration des Hydrauliksystems wird der Selbstkalibrierungsmodus verlassen und die Ventilsteuervorrichtung in einen für den Normalbetrieb des Hydrauliksystems vorgesehenen Normalbetriebsmodus versetzt. The valve control device according to the invention not only simplifies an initial configuration of a hydraulic system provided in a vehicle in the case of a plurality of available valve options, but also a later replacement of the valve type during maintenance or revision work. The various valve types and their associated identification features or control algorithms are hereby stored in a table in a memory device associated with the control unit. Upon completion of the configuration of the hydraulic system, the self-calibration mode is exited and the valve control device is placed in a normal operating mode provided for normal operation of the hydraulic system.
Vorteilhafte Weiterbildungen der erfindungsgemäßen Ventilsteuervorrichtung gehen aus den Unteransprüchen hervor. Advantageous developments of the valve control device according to the invention will become apparent from the dependent claims.
Vorzugsweise ermittelt die Kontrolleinheit den charakteristischen Stellweg anhand vorgegebener Referenzpositionen des von der Stelleinheit umfassten Betätigungsgebers. Bei dem Betätigungsgeber kann es sich beispielsweise um eine mit dem Ventilschieber verbundene Zahnstange handeln, die in Eingriff mit einem Zahnradantrieb des Schrittmotors steht. Die Zahnstange sowie der aus einem oder mehreren Zahnrädern bestehende Zahnradantrieb sind Bestandteil des von der Stelleinheit umfassten Antriebsmechanismus . Preferably, the control unit determines the characteristic travel based on predetermined reference positions of the actuator unit included actuator. For example, the actuator may be a rack connected to the valve spool that is in engagement with a gear drive of the stepper motor. The rack and the one or more gears consisting of gear drive are part of the drive mechanism included by the actuator.
Jeder der Referenzpositionen des Betätigungsgebers entspricht hierbei eine bestimmte Ventilstellung. Betätigungsgeber und Ventilschieber sind mittels eines Splints oder dergleichen lösbar miteinander verbunden, können jedoch auch als bauliche Einheit ausgebildet sein. Each of the reference positions of the actuator corresponds to a specific valve position. Actuator and valve spool are releasably connected to each other by means of a splint or the like, but can also be designed as a structural unit.
Die vorgegebenen Referenzpositionen sind insbesondere durch einen oder mehrere mechanische Endanschläge und/oder eine definierte Neutralstellung des Betätigungsgebers und/oder des mit dem Betätigungsgeber verbundenen Ventilschiebers gebildet. In diesem Fall ergibt sich der charakteristische Stellweg des Ventils unmittelbar aus dem zwischen den beiden Endanschlägen bzw. aus dem zwischen zumindest einem der Endanschläge und der definierten Neutralstellung vom Betätigungsgeber und/oder Ventilschieber zu durchfahrenden Betätigungsweg. The predetermined reference positions are in particular formed by one or more mechanical limit stops and / or a defined neutral position of the actuating transmitter and / or the valve slide connected to the actuating transmitter. In this case, the characteristic travel of the valve results directly from between the two end stops or from between at least one of the end stops and the defined neutral position of the actuator and / or valve slide to be traversed actuating travel.
Hierbei ist es möglich, dass die Kontrolleinheit das Erreichen der mechanischen Endanschläge durch Erfassung eines an der Stelleinheit auftretenden Lastanstiegs erkennt. Der Lastanstieg lässt sich beispielsweise aufgrund eines bei Erreichen des Endanschlags zunehmenden Strombedarfs des Schrittmotors ermitteln. Die erfindungsgemäße Ventilsteuervorrichtung wird im Folgenden anhand der beigefügten Zeichnung näher erläutert. Dabei zeigt die einzige Figur ein Ausführungsbeispiel der erfindungsgemäßen Ventilsteuervorrichtung für ein Fahrzeug. In this case, it is possible that the control unit recognizes the achievement of the mechanical end stops by detecting a load increase occurring at the setting unit. The load increase can be determined, for example, on the basis of an increasing current requirement of the stepping motor when the end stop is reached. The valve control device according to the invention will be explained in more detail below with reference to the accompanying drawings. The single FIGURE shows an embodiment of the valve control device according to the invention for a vehicle.
Bei dem Fahrzeug handelt es sich im vorliegenden Fall um ein nicht dargestelltes landwirtschaftliches Nutzfahrzeug, insbesondere einen Traktor, eine Erntemaschine, einen Feldhäcksler oder dergleichen . In the present case, the vehicle is an unillustrated agricultural utility vehicle, in particular a tractor, a harvesting machine, a forage harvester or the like.
Die in dem landwirtschaftlichen Nutzfahrzeug angeordnete Ventilsteuervorrichtung 10 umfasst eine Kontrolleinheit 12 zur An- steuerung eines elektromagnetisch betätigbaren Ventils 14 sowie eine mit der Kontrolleinheit 12 über eine Steuerleitung 16 in Verbindung stehende Stelleinheit 18. Die Stelleinheit 18 ist beispielsgemäß als elektrisch steuerbarer Aktuator in Gestalt eines Schrittmotors 20 ausgebildet, der über einen zugehörigen Antriebsmechanismus 22 mit einem dem Ventil 14 zugeordneten Ventilschieber 26 in Verbindung steht. Schrittmotor 20 und Antriebsmechanismus 22 sind in einem gemeinsamen Gehäuse 24 untergebracht. Der in einem Ventilblock 28 geführte Ventilschieber 26 lässt sich mittels des Schrittmotors 20 in verschiedene Positionen verbringen, wobei jede der Positionen einer bestimmten Ventilstellung entspricht. The valve control device 10 arranged in the agricultural utility vehicle comprises a control unit 12 for controlling an electromagnetically operable valve 14 and an actuating unit 18 in communication with the control unit 12 via a control line 16. The control unit 18 is, for example, an electrically controllable actuator in the form of a stepper motor 20 formed, which is connected via an associated drive mechanism 22 with a valve 14 associated with valve slide 26 in conjunction. Stepper motor 20 and drive mechanism 22 are housed in a common housing 24. The valve slide 26, which is guided in a valve block 28, can be moved into different positions by means of the stepping motor 20, wherein each of the positions corresponds to a specific valve position.
Der von dem Ventilschieber 26 zwischen den verschiedenen Positionen zu durchfahrende Stellweg ist charakteristisch für den jeweiligen Ventiltyp, erlaubt also dessen eindeutige Identifizierung zum Zwecke der Selbstkalibrierung eines damit ausgestatteten Hydrauliksystems. Mit anderen Worten bildet der charakteris- tische Stellweg ein dem verwendeten Ventil 14 eindeutig zugeordnetes Identifikationsmerkmal. The travel to be traversed by the valve spool 26 between the various positions is characteristic of the respective valve type, thus allowing its unique identification for the purpose of self-calibration of a hydraulic system equipped therewith. In other words, the characteristic table travel a the valve 14 uniquely assigned identification feature.
Zur Selbstkalibrierung des Hydrauliksystems ermittelt die Kontrolleinheit 12 den charakteristischen Stellweg anhand vorgegebener Referenzpositionen eines von der Stelleinheit 18 umfassten Betätigungsgebers 30. Bei dem Betätigungsgeber 30 handelt es sich um eine mit dem Ventilschieber 26 verbundene Zahnstange 32, die in Eingriff mit einem Zahnradantrieb 34 des Schrittmotors 20 steht. Die Zahnstange 32 sowie der aus einem ersten und zweiten Zahnrad 36 und 38 bestehende Zahnradantrieb 34 sind Bestandteil des von der Stelleinheit 18 umfassten Antriebsmechanismus 22. For self-calibration of the hydraulic system, the control unit 12 determines the characteristic travel by means of predetermined reference positions of an actuator 30 encompassed by the actuator 18. The actuator 30 is a rack 32 connected to the valve spool 26 which meshes with a gear drive 34 of the stepper motor 20 stands. The toothed rack 32 and the gearwheel drive 34 consisting of a first and second toothed wheel 36 and 38 are part of the drive mechanism 22 encompassed by the setting unit 18.
Jeder der Referenzpositionen des Betätigungsgebers 30 entspricht hierbei eine bestimmte Ventilstellung. Betätigungsgeber 30 und Ventilschieber 26 sind mittels eines Splints 40 oder dergleichen lösbar miteinander verbunden, können jedoch auch als bauliche Einheit ausgebildet sein. Each of the reference positions of the actuator 30 here corresponds to a specific valve position. Actuator 30 and valve slide 26 are releasably connected to each other by means of a splint 40 or the like, but may also be designed as a structural unit.
An dieser Stelle sei angemerkt, dass es sich abweichend von der dargestellten Ausgestaltung des Schrittmotors 20 als Drehwinkelgeber grundsätzlich auch um einen Linearweggeber handeln kann. In diesem Fall können Zahnstange 32 und Zahnradantrieb 34 zur Betätigung des Ventilschiebers 26 entfallen. Der Antriebsmechanismus 22 ist dann typischerweise als von dem Schrittmotor 20 angetriebene Trapezschraube ausgebildet. At this point, it should be noted that, in deviation from the illustrated embodiment of the stepping motor 20 as a rotary encoder, it may basically also be a linear displacement sensor. In this case, rack 32 and gear drive 34 for actuating the valve spool 26 may be omitted. The drive mechanism 22 is then typically formed as a trapezoidal screw driven by the stepper motor 20.
Die vorgegebenen Referenzpositionen sind beispielsgemäß durch einen ersten mechanischen Endanschlag 42 des Betätigungsgebers 30 sowie einen zweiten Endanschlag 44 des Ventilschiebers 26 ge- bildet. In diesem Fall ergibt sich der charakteristische The predetermined reference positions are, for example, by a first mechanical end stop 42 of the actuator 30 and a second end stop 44 of the valve spool 26. forms. In this case, the characteristic results
Stellweg des Ventils 14 unmittelbar aus dem zwischen den beiden Endanschlägen 42 und 44 vom Betätigungsgeber 30 bzw. Ventilschieber 26 zu durchfahrenden Betätigungsweg. Optional können die vorgegebenen Referenzpositionen auch durch einen einzelnen der mechanischen Endanschläge 42 oder 44 in Verbindung mit einer definierten Neutralstellung des Betätigungsgebers 30 bzw. Ventilschiebers 26 gebildet sein. Actuation of the valve 14 directly from between the two end stops 42 and 44 from the actuator 30 and valve slide 26 to be traversed actuating travel. Optionally, the predetermined reference positions can also be formed by a single one of the mechanical end stops 42 or 44 in conjunction with a defined neutral position of the actuating transmitter 30 or valve slide 26.
Die Kontrolleinheit 12 erkennt das Erreichen des jeweiligen mechanischen Endanschlags 42 bzw. 44 durch Erfassung eines an der Stelleinheit 18 auftretenden Lastanstiegs. Der Lastanstieg wird von der Kontrolleinheit 12 aufgrund eines bei Erreichen des Endanschlags 42 bzw. 44 zunehmenden Strombedarfs des Schrittmotors 20 ermittelt. The control unit 12 detects the reaching of the respective mechanical end stop 42 or 44 by detecting a load increase occurring on the setting unit 18. The increase in load is determined by the control unit 12 due to an increasing current requirement of the stepping motor 20 upon reaching the limit stop 42 or 44.
Zur Selbstkalibrierung des Hydrauliksystems fragt die Kontrolleinheit 12 bei Aktivierung eines Selbstkalibrierungsmodus in einem ersten Schritt den charakteristischen Stellweg des Ventils 14 ab. Hierzu wird der Betätigungsgeber 30 durch entsprechende Ansteuerung der Stelleinheit 18 bzw. des von dieser umfassten Schrittmotors 20 zunächst an den ersten mechanischen Endanschlag 42 herangefahren. Danach wird der Betätigungsgeber 30 an den zweiten mechanischen Endanschlag 44 herangefahren. Der charakteristische Stellweg wird von der Kontrolleinheit 12 durch Erfassung der Anzahl der Schritte, die der Schrittmotor 20 zum vollständigen Durchfahren des Stellwegs zwischen den beiden mechanischen Endanschlägen 40 und 42 benötigt, abgeleitet. Die Kontrolleinheit 12 ermittelt daraufhin in einem zweiten Schritt ei- nen dem abgefragten charakteristischen Stellweg entsprechenden Ventiltyp. Auf dessen Grundlage wählt die Kontrolleinheit 12 schließlich in einem dritten Schritt einen dem ermittelten Ventiltyp zugeordneten Steueralgorithmus zur Ansteuerung des elektromagnetisch betätigbaren Ventils 14 aus. For self-calibration of the hydraulic system, the control unit 12 queries the characteristic travel of the valve 14 when activating a self-calibration mode in a first step. For this purpose, the actuation transmitter 30 is moved up to the first mechanical end stop 42 by corresponding activation of the setting unit 18 or of the stepping motor 20 encompassed by the latter. Thereafter, the actuator 30 is moved up to the second mechanical end stop 44. The characteristic travel is derived from the control unit 12 by detecting the number of steps that the stepper motor 20 requires to complete the travel between the two mechanical end stops 40 and 42. The control unit 12 then determines in a second step an NEN the requested characteristic travel corresponding valve type. On the basis of this, the control unit 12 finally selects, in a third step, a control algorithm assigned to the determined valve type for actuating the electromagnetically actuatable valve 14.
Die Ventilsteuervorrichtung 10 vereinfacht nicht nur eine Erstkonfiguration des in dem landwirtschaftlichen Nutzfahrzeug vorgesehenen Hydrauliksystems für den Fall einer Vielzahl von zur Verfügung stehenden Ventiloptionen, sondern auch einen späteren Austausch des Ventiltyps im Rahmen von Wartungs- oder Revisionsarbeiten. Die verschiedenen Ventiltypen sowie deren zugehörige Identifikationsmerkmale bzw. Steueralgorithmen sind hierbei tabellarisch in einer der Kontrolleinheit 12 zugeordneten Speichereinrichtung 46 abgelegt. Nach abgeschlossener Konfiguration des Hydrauliksystems wird der Selbstkalibrierungsmodus verlassen und die Ventilsteuervorrichtung 10 in einen für den Normalbetrieb des Hydrauliksystems vorgesehenen Normalbetriebsmodus versetzt. The valve control device 10 not only simplifies an initial configuration of the hydraulic system provided in the agricultural vehicle in the case of a plurality of available valve options, but also a later replacement of the valve type in the context of maintenance or revision work. The various valve types as well as their associated identification features or control algorithms are stored in a tabular form in a memory device 46 assigned to the control unit 12. Upon completion of the configuration of the hydraulic system, the self-calibration mode is exited and the valve control device 10 is placed in a normal operating mode provided for normal operation of the hydraulic system.

Claims

Patentansprüche claims
Ventilsteuervorrichtung für ein Fahrzeug, insbesondere ein landwirtschaftliches Nutzfahrzeug, mit einer Kontrolleinheit (12) zur Ansteuerung eines elektromagnetisch Valve control device for a vehicle, in particular an agricultural utility vehicle, with a control unit (12) for controlling an electromagnetic
betätigbaren Ventils (14), wobei die Kontrolleinheit (12) bei Aktivierung eines Selbstkalibrierungsmodus ein dem elektromagnetisch betätigbaren Ventil (14) zugeordnetes Identifikationsmerkmal abfragt, einen dem abgefragten Identifikationsmerkmal entsprechenden Ventiltyp ermittelt, und einen dem ermittelten Ventiltyp zugeordneten Steueralgorithmus zur Ansteuerung des elektromagnetisch betätigbaren Ventils (14) auswählt, dadurch gekennzeichnet, dass es sich bei dem Identifikationsmerkmal um einen charakteristischen Stellweg einer zur elektromagnetischen Betätigung des Ventils (14) vorgesehenen Stelleinheit (18) handelt. actuatable valve (14), wherein the control unit (12) interrogates an identification feature associated with the electromagnetically operable valve (14) when activating a self-calibration mode, determines a valve type corresponding to the requested identification feature, and a control algorithm associated with the determined valve type for actuating the electromagnetically operable valve (14). 14), characterized in that the identification feature is a characteristic travel of an actuating unit (18) provided for the electromagnetic actuation of the valve (14).
Ventilsteuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Kontrolleinheit (12) den charakteristischen Stellweg anhand vorgegebener Referenzpositionen eines von der Stelleinheit (18) umfassten Betätigungsgebers (30) ermittelt . Valve control device according to claim 1, characterized in that the control unit (12) determines the characteristic travel on the basis of predetermined reference positions of an actuator of the actuator (18) included actuator (30).
Ventilsteuervorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die vorgegebenen Referenzpositionen durch einen oder mehrere mechanische Endanschläge (40, 42) und/oder eine definierte Neutralstellung des Betätigungsge- bers (30) und/oder eines mit dem Betätigungsgeber (30) verbundenen Ventilschiebers (26) gebildet sind. Valve control device according to claim 2, characterized in that the predetermined reference positions by one or more mechanical end stops (40, 42) and / or a defined neutral position of the actuating Bers (30) and / or a valve connected to the actuator (30) valve slide (26) are formed.
4. Ventilsteuervorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Kontrolleinheit (12) das Erreichen der mechanischen Endanschläge (40, 42) durch Erfassung eines an der Stelleinheit (18) auftretenden Lastanstiegs erkennt. 4. Valve control device according to claim 3, characterized in that the control unit (12) detects the reaching of the mechanical end stops (40, 42) by detecting a load increase occurring at the setting unit (18).
5. Fahrzeug, insbesondere landwirtschaftliches Nutzfahrzeug, mit einer Ventilsteuervorrichtung (10) nach einem der Ansprüche 1 bis 4. 5. vehicle, in particular agricultural utility vehicle, with a valve control device (10) according to one of claims 1 to 4.
EP12709591.7A 2011-03-21 2012-03-13 Valve control unit for a vehicle Active EP2689144B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005868A DE102011005868A1 (en) 2011-03-21 2011-03-21 Valve control device for a vehicle
PCT/EP2012/054324 WO2012126767A2 (en) 2011-03-21 2012-03-13 Valve control device for a vehicle

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EP2689144A2 true EP2689144A2 (en) 2014-01-29
EP2689144B1 EP2689144B1 (en) 2019-08-28

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US (1) US20140326908A1 (en)
EP (1) EP2689144B1 (en)
DE (1) DE102011005868A1 (en)
WO (1) WO2012126767A2 (en)

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WO2012126767A3 (en) 2012-11-22
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US20140326908A1 (en) 2014-11-06
WO2012126767A2 (en) 2012-09-27

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