EP0106086B1 - Control device for controlling the power of a combustion engine - Google Patents

Control device for controlling the power of a combustion engine Download PDF

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Publication number
EP0106086B1
EP0106086B1 EP83108578A EP83108578A EP0106086B1 EP 0106086 B1 EP0106086 B1 EP 0106086B1 EP 83108578 A EP83108578 A EP 83108578A EP 83108578 A EP83108578 A EP 83108578A EP 0106086 B1 EP0106086 B1 EP 0106086B1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
switch
fuel pump
disturbance
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
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EP83108578A
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German (de)
French (fr)
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EP0106086A2 (en
EP0106086A3 (en
Inventor
Leon Franklin Nelson
Dan Thomas Montgomery
William John Sikula, Jr.
Michael Keith Wyffels
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Deere and Co
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Deere and Co
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Priority to AT83108578T priority Critical patent/ATE31440T1/en
Publication of EP0106086A2 publication Critical patent/EP0106086A2/en
Publication of EP0106086A3 publication Critical patent/EP0106086A3/en
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Publication of EP0106086B1 publication Critical patent/EP0106086B1/en
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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
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S56/00—Harvesters
    • Y10S56/15—Condition responsive

Definitions

  • the invention relates to a control device for controlling the power output of an internal combustion engine for motor vehicles, in particular for combine harvesters, with a fuel pump which can be controlled via the control device as a function of at least the speed of the internal combustion engine and the setting of the carburetor as disturbance variables which are fed to a control element as a function of the position of a manually operable switch for switching a work organ on and off, a feedback signal for detecting the position of an actuator being compared to a setpoint value and a difference-equal-zero signal being triggered when the feedback signal is adjusted to the setpoint value .
  • a regulating device for regulating an internal combustion engine is already generally known (US Pat. No. 3,911,883) and is equipped with an electronic control device for regulating the fuel supply to the internal combustion engine.
  • the electronic control device is controlled depending on the engine speed, the position of the accelerator pedal and the fuel flow rate, so that the internal combustion engine is always supplied with sufficient fuel so that the power output of the internal combustion engine can be adapted to the working conditions accordingly.
  • a regulating device for regulating the output of an internal combustion engine is also known (GB-A-2 071 880), which is equipped with a regulating rod which can be controlled via a regulating device and which regulates the opening degree of a throttle valve as a function of various disturbance variables, for example the engine speed or the driving speed controls.
  • a manually operated switch for switching an air conditioning system on and off is also operatively connected to the control circuit.
  • the control device increases the power output of the internal combustion engine as a function of the power consumption of the air conditioning system with the switch in the appropriate position. If, for example, the air conditioning system is switched on, the reference voltage at the associated comparators is increased by a fixed amount.
  • the setpoint value of the engine speed is increased by the power consumption of the air conditioning system and thus the power output of the internal combustion engine is adapted to the increased power requirement with regard to the air conditioning system.
  • this requires a very complex electronic circuit.
  • the invention has for its object to control the internal combustion engine using a simply designed control device such that the motor vehicle is driven consistently when an additional unit is switched on or off.
  • This object is achieved by the features listed in the characterizing part of claim 1.
  • the advantageous design and arrangement of the control device and the corresponding decrease in the controlled variable on the working elements, in particular on the emptying device of the combine harvester ensures that when the emptying device is switched on or off, the internal combustion engine adapts to the different performance conditions, so that the combine harvester always works with the same speed can be driven, for example, to eliminate crop losses.
  • the uniform drive of the combine harvester ensures that even with an attached loader wagon, crop cannot slide out of the loader wagon, since this is always pulled by the combine harvester at a constant speed.
  • This arrangement also ensures that even with different types of crop and the associated different loads for the threshing and separating devices of the combine harvester, a sufficient power output for driving the individual working elements is ensured, so that the combine harvester always moves forward smoothly.
  • This device also ensures that, for example, a traveling loading vehicle for picking up the crop can easily drive at the same speed as the combine, since there is no sudden change in the drive of the combine.
  • a hydraulically actuatable coupling establishes a drive connection between the internal combustion engine driving a combine harvester and the working element designed as a crop emptying device and can be acted upon via the control valve which can be actuated electrically depending on the position of the switch. It is also advantageous that the fuel pump of the control device has a rack and pinion drive, which controls the fuel supply to the internal combustion engine.
  • the control loop ensures that the individual disturbance variables are recorded at the point which is responsible for a possible reduction in performance when the individual work organs are switched on, and these disturbance variables are made available as a manipulated variable for adjusting the fuel pump, so that the fuel pump is always set directly as a function of the power consumption of various working elements so that the internal combustion engine provides sufficient power.
  • the combine can be driven at a constant speed and the corresponding engine power can be made available to the individual working elements.
  • FIG. 10 an embodiment of a power amplifier device for a combine harvester according to the invention is shown schematically.
  • 10 denotes an internal combustion engine of a combine harvester (not shown in the drawing for the sake of simplicity), which is used to drive the impellers (not shown in the drawing) and the other working elements, for example an emptying device 12.
  • the internal combustion engine 10 can be actuated hydraulically Coupling 14 and a drive device 16 with the emptying device 12 drive-connected.
  • the hydraulically actuated clutch 14 can be engaged or disengaged via a solenoid-controlled control valve 18.
  • the internal combustion engine 10 is supplied with fuel via a rack-controlled fuel pump 20 and thus at a controllable flow rate.
  • the fuel pump 20 is controlled via a magnetically controlled actuator 22, which has a feedback actuator.
  • the fuel pump 20 and the actuator 22 can be designed as a structural unit.
  • a control device 21 contains an electronic control element 24, from which a control variable emerges, which results from the speed of the internal combustion engine and from the throttle position.
  • the speed of the internal combustion engine 10 is detected by a sensor 26 and the position of the gas lever by a potentiometer (not shown), which record the corresponding disturbance variables, which are then fed to the control element 24.
  • a switch 28 is connected between a summing device 30 and the electromagnetic control valve 18 and thus supplies a controlled variable to the control valve 18 in the closed position of the switch 28.
  • the summing device 30 generates an output signal which results from the sum of the signals from the switch 28 and the Control element 24 is composed.
  • a subtraction device 32 generates a controlled variable which represents a difference between the output signal from the summing device 30 and the feedback signal from the actuator 22.
  • the control circuit 21 operates in a conventional manner and controls the speed of the internal combustion engine 10.
  • the internal combustion engine 10 is set to a value so that the internal combustion engine does not output more power than for the current one Operating state for driving the individual units is necessary.
  • the control of the internal combustion engine 10 takes place as a function of the speed of the internal combustion engine.
  • the switch 28 is closed in order to switch on the emptying device 12, the size or the amount of the controlled variable is immediately changed upward, so that the internal combustion engine 10 is supplied with fuel at a higher flow rate, in order to increase the output power of the internal combustion engine increase. This prevents the driving speed of the combine from being reduced when the emptying device 12 is switched on while the combine is traveling.
  • the power booster device described can also be used in other agricultural, mobile devices which are driven by a motor or an internal combustion engine in order to always have the necessary driving force for driving all connected working tools when a further working tool is connected.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Harvester Elements (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Description

Die Erfindung bezieht sich auf eine Regelvorrichtung zur Regelung der Leistungsabgabe einer Brennkraftmaschine für Kraftfahrzeuge, insbesondere für Mähdrescher, mit einer über die Regelvorrichtung steuerbaren Kraftstoffpumpe in Abhängigkeit von mindestens der die Drehzahl der Brennkraftmaschine und der Einstellung des Vergasers als Störgrößen, die einem Regelelement zugeführt werden un in Abhängigkeit von der Stellung eines manuell betätigbaren Schalters zum Ein- und Ausschalten eines Arbeitsorganes, wobei ein Rückführsignal zur Erfassung der Stellung eines Stellgliedes mit einem Sollwert verglichen wird und wobei bei Angleichung des Rückführsignales an den Sollwert ein Differenz-gleich-null-Signal ausgelöst wird.The invention relates to a control device for controlling the power output of an internal combustion engine for motor vehicles, in particular for combine harvesters, with a fuel pump which can be controlled via the control device as a function of at least the speed of the internal combustion engine and the setting of the carburetor as disturbance variables which are fed to a control element as a function of the position of a manually operable switch for switching a work organ on and off, a feedback signal for detecting the position of an actuator being compared to a setpoint value and a difference-equal-zero signal being triggered when the feedback signal is adjusted to the setpoint value .

Es ist bereits allgemein ein Informationssystem für eine Brennkraftmaschine bekannt, die hierzu Mikroprozessoren einsetzt, um entsprechende Funktionsstörungen zu erfassen (WO-A-8 201 354). Keines der bekannten Funktionselemente kann jedoch in das entsprechende Gerät ohne Verwendung eines besonderen Computerprogramms bzw. einer Software eingesetzt werden.An information system for an internal combustion engine is already generally known which uses microprocessors for this purpose in order to detect corresponding malfunctions (WO-A-8 201 354). However, none of the known functional elements can be inserted into the corresponding device without using a special computer program or software.

Es ist bereits eine Regelvorrichtung zur Regelung einer Brennkraftmaschine allgemein bekannt (US-A-3 911 -883), die mit einer elektronischen Steuervorrichtung zur Regelung der Kraftstoffzufuhr zur Brennkraftmaschine ausgerüstet ist. Die elektronische Steuervorrichtung wird in Abhängigkeit von der Motordrehzahl, der Stellung des Gaspedals und der Kraftstoffdurchflußrate gesteuert, so daß die Verbrennungskraftmaschine stets mit ausreichend Kraftstoff versorgt wird, um somit die Leistungsabgabe der Brennkraftmaschine den Arbeitsbedingungen entsprechend anpassen zu können.A regulating device for regulating an internal combustion engine is already generally known (US Pat. No. 3,911,883) and is equipped with an electronic control device for regulating the fuel supply to the internal combustion engine. The electronic control device is controlled depending on the engine speed, the position of the accelerator pedal and the fuel flow rate, so that the internal combustion engine is always supplied with sufficient fuel so that the power output of the internal combustion engine can be adapted to the working conditions accordingly.

Es ist außerdem eine Regelvorrichtung zur Regelung der Leistungsabgabe einer Brennkraftmaschine bekannt (GB-A-2 071 880), die mit einer über eine Regelvorrichtung steuerbaren Regelstange ausgestattet ist, die den Öffnungsgrad einer Drosselklappe in Abhängigkeit von verschiedenen Störgrößen, beispielsweise der Motordrehzahl oder der Fahrgeschwindigkeit, steuert. Ein manuell betätigbarer Schalter zum Ein- und Ausschalten einer Klimaanlage ist ebenfalls mit dem Regelkreis wirkungsmäßig verbunden. Durch die Regelvorrichtung wird in Abhängigkeit von der Leistungsaufnahme der Klimaanlage bei entsprechender Stellung des Schalters die Leistungsabgabe der Brennkraftmaschine erhöht. Wird beispielsweise die Klimaanlage eingeschaltet, so wird die Referenzspannung an den zugehörigen Komparatoren um einen festgelegten Betrag erhöht. Durch die Leistungsaufnahme der Klimaanlage wird der Sollwert der Motordrehzahl erhöht und somit die Leistungsabgabe der Brennkraftmaschine an die erhöhte Leistungsanforderung mit Rücksicht auf die Klimaanlage angepaßt. Hierzu ist jedoch eine sehr aufwendige elektronische Schaltung erforderlich.A regulating device for regulating the output of an internal combustion engine is also known (GB-A-2 071 880), which is equipped with a regulating rod which can be controlled via a regulating device and which regulates the opening degree of a throttle valve as a function of various disturbance variables, for example the engine speed or the driving speed controls. A manually operated switch for switching an air conditioning system on and off is also operatively connected to the control circuit. The control device increases the power output of the internal combustion engine as a function of the power consumption of the air conditioning system with the switch in the appropriate position. If, for example, the air conditioning system is switched on, the reference voltage at the associated comparators is increased by a fixed amount. The setpoint value of the engine speed is increased by the power consumption of the air conditioning system and thus the power output of the internal combustion engine is adapted to the increased power requirement with regard to the air conditioning system. However, this requires a very complex electronic circuit.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, die Brennkraftmaschine unter Verwendung einer einfach gestalteten Regelvorrichtung derart zu steuern, daß das Kraftfahrzeug gleichbleibend angetrieben wird, wenn ein Zusatzaggregat ein- bzw. ausgeschaltet wird. Diese Aufgabe ist durch die im kennzeichnenden Teil des Anspruches 1 aufgeführten Merkmale gelöst. Durch die vorteilhafte Ausbildung und Anordnung der Regelvorrichtung und die entsprechende Abnahme der Regelgröße an den Arbeitsorganen, insbesondere an der Entleerungsvorrichtung des Mähdreschers, wird sichergestellt, daß bei Zuschalten oder Abschalten der Entleerungsvorrichtung die Brennkraftmaschine sich den unterschiedlichen Leistungsbedingungen anpaßt, so daß der Mähdrescher stets mit der gleichen Geschwindigkeit angetrieben werden kann, um beispielsweise Erntegutverluste auszuschalten. Ebenso wird durch den gleichmäßigen Antrieb des Mähdreschers sichergestellt, daß auch bei einem angehängten Ladewagen Erntegut nicht aus dem Ladewagen herausgleiten kann, da dieser stets mit einer gleichbleibenden Geschwindigkeit von dem Mähdrescher gezogen wird. Ferner wird durch diese Anordnung sichergestellt, daß auch bei unterschiedlichen Erntegutsorten und damit verbundenen unterschiedlichen Belastungen für die Dresch-und Trennvorrichtungen des Mähdreschers eine ausreichende Leistungsabgabe zum Antrieb der einzelnen Arbeitsorgane sichergestellt wird, so daß der Mähdrescher sich stets gleichmäßig vorwärtsbewegt. Somit wird mit dieser Vorrichtung auch gewährleistet, daß beispielsweise ein mitfahrendes Ladefahrzeug zur Aufnahme des Erntegutes ohne weiteres mit der gleichen Geschwindigkeit wie der Mähdrescher fahren kann, da keine sprunghafte Veränderung des Antriebes des Mähdreschers erfolgt.In contrast, the invention has for its object to control the internal combustion engine using a simply designed control device such that the motor vehicle is driven consistently when an additional unit is switched on or off. This object is achieved by the features listed in the characterizing part of claim 1. The advantageous design and arrangement of the control device and the corresponding decrease in the controlled variable on the working elements, in particular on the emptying device of the combine harvester, ensures that when the emptying device is switched on or off, the internal combustion engine adapts to the different performance conditions, so that the combine harvester always works with the same speed can be driven, for example, to eliminate crop losses. Likewise, the uniform drive of the combine harvester ensures that even with an attached loader wagon, crop cannot slide out of the loader wagon, since this is always pulled by the combine harvester at a constant speed. This arrangement also ensures that even with different types of crop and the associated different loads for the threshing and separating devices of the combine harvester, a sufficient power output for driving the individual working elements is ensured, so that the combine harvester always moves forward smoothly. This device also ensures that, for example, a traveling loading vehicle for picking up the crop can easily drive at the same speed as the combine, since there is no sudden change in the drive of the combine.

In weiterer Ausgestaltung der Erfindung ist es vorteilhaft, daß eine hydraulisch betätigbare Kupplung eine Antriebsverbindung zwischen der einen Mähdrescher antreibenden Brennkraftmaschine und dem als Erntegut-Entleerungsvorrichtung ausgebildeten Arbeitsorgan herstellt und über das in Abhängigkeit von der Stellung des Schalters elektrisch betätigbare Stellventil beaufschlagbar ist. Ferner ist es vorteilhaft, daß die Kraftstoffpumpe der Regelvorrichtung einen Zahnstangentrieb aufweist, der die Kraftstoffversorgung der Brennkraftmaschine steuert. Durch den Regelkreis wird sichergestellt, daß die einzelnen Störgrößen an der Stelle erfaßt werden, die für eine eventuelle Leistungsverminderung bei Zuschaltung der einzelnen Arbeitsorgane verantwortlich ist, und diese Störgrößen als Stellgröße zur Verstellung der Kraftstoffpumpe zur Verfügung gestellt werden, so daß unmittelbar in Abhängigkeit von der Leistungsaufnahme verschiedener Arbeitsorgane die Kraftstoffpumpe stets so eingestellt wird, daß die Brennkraftmaschine eine ausreichende Leistung zur Verfügung stellt. Hierdurch kann der Mähdrescher mit einer gleichbleibenden Geschwindigkeit angetrieben und den einzelnen Arbeitsorganen die entsprechende Motorleistung zur Verfügung gestellt werden.In a further embodiment of the invention, it is advantageous that a hydraulically actuatable coupling establishes a drive connection between the internal combustion engine driving a combine harvester and the working element designed as a crop emptying device and can be acted upon via the control valve which can be actuated electrically depending on the position of the switch. It is also advantageous that the fuel pump of the control device has a rack and pinion drive, which controls the fuel supply to the internal combustion engine. The control loop ensures that the individual disturbance variables are recorded at the point which is responsible for a possible reduction in performance when the individual work organs are switched on, and these disturbance variables are made available as a manipulated variable for adjusting the fuel pump, so that the fuel pump is always set directly as a function of the power consumption of various working elements so that the internal combustion engine provides sufficient power. As a result, the combine can be driven at a constant speed and the corresponding engine power can be made available to the individual working elements.

In der Zeichnung ist ein Ausführungsbeispiel einer Kraftverstärkereinrichtung für einen Mähdrescher nach der Erfindung schematisch dargestellt. In der Zeichnung ist mit 10 eine Brennkraftmaschine eines in der Zeichnung der Einfachheit halber nicht dargestellten Mähdreschers bezeichnet, die zum Antrieb der in der Zeichnung nicht dargestellten Laufräder und der übrigen Arbeitsorgane dient, beispielsweise einer Entleerungsvorrichtung 12. Die Brennkraftmaschine 10 ist hierzu über eine hydraulisch betätigbare Kupplung 14 und eine Antriebsvorrichtung 16 mit der Entleerungsvorrichtung 12 antriebsverbunden. Die hydraulisch betätigbare Kupplung 14 läßt sich über ein magnetgesteuertes Stellventil 18 ein- bzw. ausrücken.In the drawing, an embodiment of a power amplifier device for a combine harvester according to the invention is shown schematically. In the drawing, 10 denotes an internal combustion engine of a combine harvester (not shown in the drawing for the sake of simplicity), which is used to drive the impellers (not shown in the drawing) and the other working elements, for example an emptying device 12. For this purpose, the internal combustion engine 10 can be actuated hydraulically Coupling 14 and a drive device 16 with the emptying device 12 drive-connected. The hydraulically actuated clutch 14 can be engaged or disengaged via a solenoid-controlled control valve 18.

Die Brennkraftmaschine 10 wird über eine zahnstangengesteuerte Kraftstoffpumpe 20 und somit mit einer regelbaren Durchflußrate mit Kraftstoff versorgt. Die Steuerung der Kraftstoffpumpe 20 erfolgt über ein magnetgesteuertes Stellglied 22, das ein Rückführstellglied aufweist. Die Kraftstoffpumpe 20 und das Stellglied 22 können als Baueinheit ausgebildet sein. Eine Regelvorrichtung 21 enthält ein elektronisches Regelelement 24, aus dem eine Regelgröße hervorgeht, die aus der Drehzahl der Brennkraftmaschine und aus der Gashebelstellung resultiert. Die Drehzahl der Brennkraftmaschine 10 wird über einen Sensor 26 und die Stellung des Gashebels über einen nicht dargestellten Potentiometer erfaßt, die entsprechende Störgrößen aufnehmen, die dann dem Regelelement 24 zugeleitet werden.The internal combustion engine 10 is supplied with fuel via a rack-controlled fuel pump 20 and thus at a controllable flow rate. The fuel pump 20 is controlled via a magnetically controlled actuator 22, which has a feedback actuator. The fuel pump 20 and the actuator 22 can be designed as a structural unit. A control device 21 contains an electronic control element 24, from which a control variable emerges, which results from the speed of the internal combustion engine and from the throttle position. The speed of the internal combustion engine 10 is detected by a sensor 26 and the position of the gas lever by a potentiometer (not shown), which record the corresponding disturbance variables, which are then fed to the control element 24.

Ein Schalter 28 ist zwischen einer Summiereinrichtung 30 und dem elektromagnetischen Stellventil 18 geschaltet und liefert somit in der Schließstellung des Schalters 28 eine Regelgröße an das Stellventil 18. Die Summiereinrichtung 30 erzugt ein Ausgangssignal, das sich aus der Summe der Signale von dem Schalter 28 und dem Regelelement 24 zusammensetzt. Eine Subtraktionseinrichtung 32 erzeugt eine Regelgröße, die eine Differenz zwischen dem Ausgangssignal aus der Summiereinrichtung 30 und dem Rückführungssignal aus dem Stellglied 22 darstellt.A switch 28 is connected between a summing device 30 and the electromagnetic control valve 18 and thus supplies a controlled variable to the control valve 18 in the closed position of the switch 28. The summing device 30 generates an output signal which results from the sum of the signals from the switch 28 and the Control element 24 is composed. A subtraction device 32 generates a controlled variable which represents a difference between the output signal from the summing device 30 and the feedback signal from the actuator 22.

Befindet sich die Entleerungsvorrichtung 12 in einer Ruhestellung, dann arbeitet der Regelkreis 21 auf konventionelle Weise und steuert die Geschwindigkeit der Brennkraftmaschine 10. Bei diesem Zustand wird die Brennkraftmaschine 10 auf einen Wert eingestellt, so daß die Brennkraftmaschine nicht mehr Leistung abgibt, als für den derzeitigen Betriebszustand zum Antrieb der einzelnen Aggregate notwendig ist. Die Regelung der Brennkraftmaschine 10 geschieht in Abhängigkeit von der Drehzahl der Brennkraftmaschine. Wird jedoch der Schalter 28 geschlossen, um die Entleerungsvorrichtung 12 einzuschalten, so wird die Größe bzw. der Betrag der Regelgröße sofort nach oben verändert, so daß der Brennkraftmaschine 10 Kraftstoff mit einer größeren Durchflußrate zur Verfügung gestellt wird, um somit die Ausgangsleistung der Brennkraftmaschine zu erhöhen. Dadurch wird verhindert, daß die Fahrgeschwindigkeit des Mähdreschers herabgesenkt wird, wenn die Entleerungsvorrichtung 12 während der Fahrt des Mähdreschers zugeschaltet wird.If the emptying device 12 is in a rest position, then the control circuit 21 operates in a conventional manner and controls the speed of the internal combustion engine 10. In this state, the internal combustion engine 10 is set to a value so that the internal combustion engine does not output more power than for the current one Operating state for driving the individual units is necessary. The control of the internal combustion engine 10 takes place as a function of the speed of the internal combustion engine. However, if the switch 28 is closed in order to switch on the emptying device 12, the size or the amount of the controlled variable is immediately changed upward, so that the internal combustion engine 10 is supplied with fuel at a higher flow rate, in order to increase the output power of the internal combustion engine increase. This prevents the driving speed of the combine from being reduced when the emptying device 12 is switched on while the combine is traveling.

Die beschriebene Kraftverstärkervorrichtung läßt sich auch bei anderen landwirtschaftlichen, fahrbaren Geräten einsetzen, die über einen Motor bzw. eine Brennkraftmaschine angetrieben werden, um bei Zuschaltung eines weiteren Arbeitswerkzeuges stets die notwendige Antriebskraft zum Antrieb aller zugeschalteten Arbeitswerkzeuge zur Verfügung zu haben.The power booster device described can also be used in other agricultural, mobile devices which are driven by a motor or an internal combustion engine in order to always have the necessary driving force for driving all connected working tools when a further working tool is connected.

Claims (3)

1. Control system for controlling the power output of an internal combustion engine (10) for motor vehicles, in particular combine harvesters, having a fuel pump (20) controllable through the control system (21) in dependence upon at least the speed of the internal combustion engine and the adjustment of the carburettor as disturbance variables which are fed to a control element (24) and in dependence upon the position of a manually actuated switch (28) for switching a working unit on and off, a feedback signal for detecting the position of a final controlling element (22) being compared with a desired value and a difference-equal to-zero signal being emitted on matching of the feedback signal to the desired value, characterised in that the control element (24) forms a disturbance variable which is fed to an adding device (30) to which another disturbance'variable is supplied from the position of the switch (28) for actuating an operating valve (18), the disturbance 20 variable issuing from the adding device (30) being fed to a subtraction device (32) receiving a feedback signal from the final controlling element (22) for detecting the position of the fuel pump (20), the difference of the feedback signal from the disturbance variable from the adding device (30) giving the control quantity for controlling the fuel pump (20), so that when the switch (28) is in the appropriate position, the power output of the internal combustion engine is increased in dependence upon the working use of the working unit, so as to prevent reduction of the travelling speed of the vehicle.
2. System according to claim 1, characterised in that a hydraulically actuated clutch (14) establishes a driving connection between the internal combustion engine (10) driving a combine harvester and the working unit in the form of a harvested material discharge device (12) and can have fluid admitted to it through the medium of the operating valve (18) which can be actuated electrically in dependence upon the position of the switch (28).
3. System according to claims 1 and 2, characterised in that the fuel pump (20) of the control arrangement (21) has a rack drive which controls the fuel supply of the internal combustion engine.
EP83108578A 1982-09-13 1983-08-31 Control device for controlling the power of a combustion engine Expired EP0106086B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108578T ATE31440T1 (en) 1982-09-13 1983-08-31 CONTROL DEVICE FOR CONTROLLING THE POWER OUTPUT OF AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US417236 1982-09-13
US06/417,236 US4522553A (en) 1982-09-13 1982-09-13 Combine power boost system

Publications (3)

Publication Number Publication Date
EP0106086A2 EP0106086A2 (en) 1984-04-25
EP0106086A3 EP0106086A3 (en) 1985-05-02
EP0106086B1 true EP0106086B1 (en) 1987-12-16

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EP83108578A Expired EP0106086B1 (en) 1982-09-13 1983-08-31 Control device for controlling the power of a combustion engine

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US (1) US4522553A (en)
EP (1) EP0106086B1 (en)
JP (1) JPS5974351A (en)
AR (1) AR247273A1 (en)
AT (1) ATE31440T1 (en)
AU (1) AU554175B2 (en)
BR (1) BR8304935A (en)
CA (1) CA1199183A (en)
DE (1) DE3374956D1 (en)
DK (1) DK415683A (en)
ES (1) ES525527A0 (en)

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Also Published As

Publication number Publication date
BR8304935A (en) 1984-04-24
ES8502512A1 (en) 1985-01-01
ATE31440T1 (en) 1988-01-15
DE3374956D1 (en) 1988-01-28
AU1802683A (en) 1984-03-22
DK415683A (en) 1984-03-14
CA1199183A (en) 1986-01-14
JPS5974351A (en) 1984-04-26
AR247273A1 (en) 1994-11-30
EP0106086A2 (en) 1984-04-25
DK415683D0 (en) 1983-09-13
EP0106086A3 (en) 1985-05-02
ES525527A0 (en) 1985-01-01
AU554175B2 (en) 1986-08-07
US4522553A (en) 1985-06-11

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