EP3754172B1 - Method for controlling a combustion engine - Google Patents

Method for controlling a combustion engine Download PDF

Info

Publication number
EP3754172B1
EP3754172B1 EP20155837.6A EP20155837A EP3754172B1 EP 3754172 B1 EP3754172 B1 EP 3754172B1 EP 20155837 A EP20155837 A EP 20155837A EP 3754172 B1 EP3754172 B1 EP 3754172B1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
operating characteristic
speed
internal combustion
power output
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.)
Active
Application number
EP20155837.6A
Other languages
German (de)
French (fr)
Other versions
EP3754172A1 (en
Inventor
Daniel Sprigade
Philipp Heymann
Johann Witte
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.)
Claas Selbstfahrende Erntemaschinen GmbH
Original Assignee
Claas Selbstfahrende Erntemaschinen GmbH
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 Claas Selbstfahrende Erntemaschinen GmbH filed Critical Claas Selbstfahrende Erntemaschinen GmbH
Publication of EP3754172A1 publication Critical patent/EP3754172A1/en
Application granted granted Critical
Publication of EP3754172B1 publication Critical patent/EP3754172B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F02D2200/101—Engine speed
    • 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
    • F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
    • F02D2200/604—Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
    • 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
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
    • 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
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables

Definitions

  • the invention relates to a method for controlling an internal combustion engine, wherein the internal combustion engine is operated along a predetermined operating characteristic curve,
  • a control of an internal combustion engine is from the DE102008020497A1 known.
  • the internal combustion engine is operated along the full-load characteristic curve and load fluctuations are compensated for with an auxiliary unit in order to keep the internal combustion engine at a selected operating point.
  • Further examples of such control of an internal combustion engine can be found in WO 2011/026807 A1 , the EP 3 257 353 A1 , the EP 2 223 588 A2 and the US 2004/088103 A1 .
  • the problem with the control is that the combustion engine is constantly operated at the full load characteristic.
  • the object of the invention is to provide an improved control method for an internal combustion engine, in particular for an internal combustion engine in a self-propelled harvester.
  • the problem is solved by a method for controlling an internal combustion engine, wherein the internal combustion engine is operated along a predetermined operating characteristic curve, the power output of the internal combustion engine increasing monotonically with the speed along the operating characteristic curve, the operating characteristic curve being below the full-load characteristic curve, with the exception of the operating point with maximum power output .
  • the power output of the internal combustion engine increases monotonically with the speed along the operating characteristic curve, the power output at a first speed is at least as high as at a second speed if the first speed is higher than the second speed. As the speed increases, the power output never drops. At the lowest possible power output, the speed is no greater than at the highest possible power output. Preferably, at the lowest possible power output, the speed is lower than at the highest possible power output.
  • the Power output can increase or decrease even at constant speed, which corresponds to an infinite slope of the operating characteristic.
  • Operating along a predetermined operating characteristic curve does not mean that the internal combustion engine never reaches operating points outside the predetermined operating characteristic curve. Due to external influences, the operating point of the internal combustion engine can move away from the predetermined operating characteristic curve, but the internal combustion engine is always regulated back to the predetermined operating characteristic curve. For example, a sudden increase in load can slow down the internal combustion engine, then the power output of the engine is increased and the internal combustion engine is thereby accelerated until the operating point is again on the predetermined operating characteristic curve. As the load decreases, the speed of the internal combustion engine will increase, then the power output of the engine is throttled so that the speed of the internal combustion engine drops again until the operating point is again on the predetermined operating characteristic curve.
  • a monotonically increasing operating characteristic curve enables comfortable operation.
  • An operating characteristic curve that is largely below the full-load characteristic curve enables efficient operation of the internal combustion engine.
  • the predetermined operating characteristic curve preferably runs linearly, at least in sections.
  • a linear operating characteristic curve enables particularly simple control.
  • the predetermined operating characteristic curve preferably runs vertically at least in sections.
  • a vertical operating characteristic curve means a constant speed with fluctuating power output. This enables particularly comfortable operation, especially for self-propelled harvesters.
  • the operating characteristic curve has a vertical section at the highest speed of the operating characteristic curve. In the area of the highest power output and thus the highest speed, since the operating characteristic increases monotonically, comfortable operation and thus a constant speed with fluctuating power output is particularly desirable.
  • the predetermined operating characteristic curve increases strictly monotonically below the highest speed.
  • a strictly monotonically increasing operating characteristic means that the power output at a first speed is higher than at a second speed if the first speed is higher than the second speed.
  • a strictly monotonically increasing operating characteristic curve enables simple and efficient control, especially with strongly fluctuating performance requirements.
  • the predetermined operating characteristic curve is preferably selected from a large number of operating characteristic curves.
  • the operating characteristics can meet different requirements. Depending on the operating situation, the most suitable one can be selected from the large number of operating characteristics.
  • the selection is preferably made depending on an input from the operator.
  • the operator directly selects the desired operating characteristic.
  • the operator selects the desired requirements and a control device then selects the appropriate operating characteristic.
  • the selection is particularly preferably carried out automatically depending on an operating situation.
  • the operating situation can be determined from various sensor values. For example, the amount of crop to be processed can be detected using a layer height sensor. If there is a large amount of crop, it is preferred to choose an operating characteristic that ensures consistent work quality. For a small amount of crop, an operating characteristic curve is selected that ensures particularly efficient operation.
  • the invention further relates to a self-propelled harvester with an internal combustion engine and a control device, the control device being intended and set up to operate the internal combustion engine according to one of the methods described above.
  • a self-propelled harvester is operated particularly comfortably and efficiently thanks to the method for controlling the combustion engine.
  • the self-propelled harvester preferably includes at least one working element and a travel drive and the internal combustion engine is intended and set up for this purpose to supply both the drive and the working organ with energy.
  • the combustion engine is connected to both the traction drive and the working element and is able to supply both the traction drive and the working element with energy. This means that only the combustion engine is required as an energy source for both consumers.
  • the self-propelled harvester comprises an electric motor, the electric motor being intended and set up to support or load the internal combustion engine depending on the control of the electric motor.
  • the electric motor is advantageously connected to an energy storage device.
  • the electric motor can take energy from the energy storage and deliver energy to the energy storage. If the power requirement increases, the electric motor is able to generate the additional power until the internal combustion engine is set to an operating point at which it can cover the power requirement.
  • the electric motor can also advantageously introduce energy into the energy storage. If the power requirement drops, the electric motor is able to convert energy emitted by the combustion engine but not required by the drive and working element and store it in the energy storage device.
  • the energy storage can be designed, for example, as a capacitor, accumulator or kinetic energy storage. The electric motor is therefore able to improve the control of the internal combustion engine.
  • the working speed of the at least one working element is coupled to the speed of the internal combustion engine.
  • a coupling of the working speed of the at least one working element to the speed of the internal combustion engine can be achieved, for example, via a mechanical connection between the internal combustion engine and the working element. Such a connection is often very efficient in energy transfer. However, a fluctuating working speed of the work organ is often bad for the work result.
  • a constant speed causes a constant working speed of the working element and thus a consistently good work result.
  • a constant speed is achieved in particular by a high slope of the operating characteristic curve or a vertical operating characteristic curve.
  • a constant working speed and therefore a constant speed of the internal combustion engine particularly advantageous when there is a high power requirement and thus a high power output from the internal combustion engine.
  • the driving speed of the self-propelled harvester is preferably independent of the speed of the internal combustion engine.
  • Independence of the driving speed from the speed of the combustion engine can be achieved, for example, using an adjustable hydraulic clutch.
  • the power transmitted from the combustion engine to the traction drive can be adjusted independently of the speed and power output of the combustion engine.
  • the driving speed generally determines how much crop is picked up by the harvester and has to be processed by the work organs and thus the power requirements of the work organs.
  • the required power output of the internal combustion engine can be influenced by the driving speed, which can be set independently of the speed of the internal combustion engine.
  • FIG. 1 a simplified consumption diagram of an exemplary internal combustion engine is shown.
  • the speed 4 of the internal combustion engine is plotted on the horizontal axis.
  • the speed 4 increases from left to right.
  • the power output 3 of the internal combustion engine is plotted on the vertical axis.
  • the power output 3 increases from bottom to top.
  • the possible ones Operating points of the internal combustion engine are limited by the full load characteristic curve 6.
  • the full-load characteristic curve 6 indicates the maximum power output 3 of the internal combustion engine can be at a certain speed 4.
  • the consumption characteristics 12, 13, 14 connect operating points with the same specific fuel consumption.
  • the specific fuel consumption is generally greater near the full-load characteristic curve 3 than in the inner area of the consumption diagram.
  • the internal combustion engine works most efficiently in the inner area of the innermost consumption characteristic curve 12, since the specific fuel consumption of the internal combustion engine is lowest there.
  • FIG 2 a monotonically increasing operating characteristic curve 2 is shown in a consumption diagram.
  • the operating characteristic curve 2 along which the internal combustion engine is operated extends from the first operating point 5 at a first speed with maximum power output 3 to a second operating point 15 at a second speed with minimum power output 3.
  • the operating characteristic curve is continuously linear and strictly monotonically increasing .
  • the first speed is smaller than the second speed and the power output 3 increases linearly with the speed 4.
  • the operating characteristic curve 2 goes through the area of the innermost consumption characteristic curve 12 in which the specific fuel consumption is particularly low. This operating characteristic curve 2 enables particularly efficient operation of the internal combustion engine.
  • FIG 3 is a vertical operating characteristic curve 2 shown in a consumption diagram. Below are just the differences Figure 1 explained.
  • the operating characteristic curve 2 along which the internal combustion engine is operated extends from a third operating point 16 at the first speed with minimum power output to the first operating point 5 at the first speed with maximum power output.
  • the operating characteristic curve 2 is vertical in this example.
  • Speed 4 is identical at all points on operating characteristic curve 2. This operating characteristic curve 2 enables particularly comfortable operation of the internal combustion engine and ensures consistent work quality thanks to the constant speed.
  • FIG 4 a monotonically increasing operating characteristic curve 2 with a vertical section is shown in a consumption diagram.
  • the operating characteristic curve 2 combines a vertical section in the area of high power output with a linearly increasing section in the area of low power output.
  • the operating characteristic curve 2 extends from the first operating point 5 at the first speed with maximum power output via a fourth operating point 17 at the first speed with average power output to the second operating point 15 at the second speed with minimum power output.
  • FIG. 5 a monotonically increasing operating characteristic curve 2 with several vertical sections is shown in a consumption diagram.
  • the operating characteristic curve 2 extends from the first operating point 5 at the first speed with maximum power output over the fourth operating point 17 at the first speed and the average power output, a fifth operating point 18 at a third speed and the same power output as at the fourth operating point 17, one sixth operating point 19 at the third speed with low power output, a seventh operating point 20 at the second speed and the same power output as at the sixth operating point 19 to the second operating point 15 at the second speed with minimal power output.
  • the third speed is lower than the first speed and higher than the second speed.
  • This operating characteristic curve 2 combines comfort on the vertical sections with an efficient progression through the area of lowest specific consumption.
  • FIG 6 a monotonically increasing operating characteristic curve 2 with several vertical sections and an obliquely increasing section is shown in a consumption diagram.
  • the operating characteristic curve extends from the first operating point 5 at the first speed with maximum power output to the fourth operating point 17 at the first speed and the average power output, the fifth operating point 18 at the third speed and the same power output as at the fourth operating point 17, the sixth Operating point 19 at the third speed with low power output to the second operating point 15 at the second speed with minimal power output.
  • This operating characteristic combines comfort on the vertical Sections with an efficient progression through the area of lowest specific consumption.
  • a self-propelled harvester 7 is shown in the form of a forage harvester.
  • the self-propelled harvester 7 is driven through a field 21, for example a corn field.
  • a crop flow 22 made of plant parts is drawn in during operation through a feed channel 23 and fed to a working element 9, here a chopper drum, for the purpose of further shredding.
  • the self-propelled harvester 7 includes a travel drive 10 with a drive axle for drive wheels (not shown).
  • the self-propelled harvester 7 has an internal combustion engine 1.
  • the internal combustion engine 1 serves both to drive the traction drive 10 and, at the same time, to drive various working elements 9.
  • a drive train 24 is provided, which is divided into at least two partial drive trains 25, 26 divides.
  • the first partial drive train 25 is intended for transmitting drive power from the internal combustion engine 1 to the working element 9.
  • the second partial drive train 26 is intended for transmitting drive power to the traction drive 10.
  • FIG 7 A control device 8 is also shown. At least one operating characteristic curve 2 is stored in the control unit 8.
  • the stored operating characteristic curve 2 can, for example, be one of the ones in the Figures 2 to 6 operating characteristics shown can be 2.
  • the control unit 8 controls the internal combustion engine 1 along the stored operating characteristic curve 2.
  • a speed and/or torque sensor is provided on the drive train 24.
  • the operator can select one of the operating characteristics via an input device 28.
  • the self-propelled harvester includes an electric motor 11 in addition to the internal combustion engine 1.
  • the electric motor 11 is connected to the drive train 12 via a third partial drive train 27 and can support or load the internal combustion engine 1.
  • the electric motor 11 is connected to an energy storage device 29.
  • the electric motor 11 can take energy from the energy storage 29 to support the internal combustion engine 1 and under load of the internal combustion engine 1 store energy in the energy storage 29.
  • the control unit 8 is connected to the electric motor 11 and regulates whether and to what extent the electric motor 11 supports or loads the internal combustion engine 1.
  • the electric motor 11 delivers torque to the drive train 12 and thus supports the internal combustion engine 1 until the internal combustion engine 1 has reached an operating point in which the power output of the internal combustion engine 1 corresponds to the power requirement. If the power requirement drops and the speed 4 on the drive train 12 increases as a result, since the power output of the internal combustion engine 1 is greater, i.e. the power requirement, the electric motor 11 loads the drive train 12 until the internal combustion engine 1 has reached an operating point in which the power output of the internal combustion engine 1 corresponds to the power requirement.

Landscapes

  • 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)
  • Hybrid Electric Vehicles (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Ansteuerung eines Verbrennungsmotors, wobei der Verbrennungsmotor entlang einer vorbestimmten Betriebskennlinie betrieben wird,The invention relates to a method for controlling an internal combustion engine, wherein the internal combustion engine is operated along a predetermined operating characteristic curve,

Eine Ansteuerung eines Verbrennungsmotors ist aus der DE102008020497A1 bekannt. Dabei wird der Verbrennungsmotor entlang der Vollastkennlinie betrieben und Lastschwankungen mit einem Hilfsaggregat ausgeglichen, um den Verbrennungsmotor in einem gewählten Betriebspunkt zu halten. Weitere Beispiele für eine solche Ansteuerung eines Verbrennungsmotors finden sich in der WO 2011/026807 A1 , der EP 3 257 353 A1 , der EP 2 223 588 A2 und der US 2004/088103 A1 .A control of an internal combustion engine is from the DE102008020497A1 known. The internal combustion engine is operated along the full-load characteristic curve and load fluctuations are compensated for with an auxiliary unit in order to keep the internal combustion engine at a selected operating point. Further examples of such control of an internal combustion engine can be found in WO 2011/026807 A1 , the EP 3 257 353 A1 , the EP 2 223 588 A2 and the US 2004/088103 A1 .

Problematisch an der Ansteuerung ist, dass der Verbrennungsmotor dauerhaft auf der Volllastkennlinie betrieben wird.The problem with the control is that the combustion engine is constantly operated at the full load characteristic.

Aufgabe der Erfindung ist es ein verbessertes Ansteuerungsverfahren für einen Verbrennungsmotor, insbesondere für einen Verbrennungsmotor in einer Selbstfahrenden Erntemaschine, anzugeben.The object of the invention is to provide an improved control method for an internal combustion engine, in particular for an internal combustion engine in a self-propelled harvester.

Gelöst wird die Aufgabe durch ein Verfahren zur Ansteuerung eines Verbrennungsmotors, wobei der Verbrennungsmotor entlang einer vorbestimmten Betriebskennlinie betrieben wird, wobei die Leistungsabgabe des Verbrennungsmotors entlang der Betriebskennlinie monoton mit der Drehzahl ansteigt, wobei die Betriebskennlinie mit Ausnahme des Betriebspunktes mit maximaler Leistungsabgabe unterhalb der Vollastkennlinie liegt.The problem is solved by a method for controlling an internal combustion engine, wherein the internal combustion engine is operated along a predetermined operating characteristic curve, the power output of the internal combustion engine increasing monotonically with the speed along the operating characteristic curve, the operating characteristic curve being below the full-load characteristic curve, with the exception of the operating point with maximum power output .

Da die Leistungsabgabe des Verbrennungsmotors entlang der Betriebskennlinie monoton mit der Drehzahl ansteigt, ist die Leistungsabgabe bei einer ersten Drehzahl mindestens so hoch wie bei einer zweiten Drehzahl, wenn die erste Drehzahl höher ist als die zweite Drehzahl. Bei steigender Drehzahl fällt die Leistungsabgabe also niemals ab. Bei der kleinstmöglichen Leistungsabgabe ist die Drehzahl damit nicht größer als bei der größtmöglichen Leistungsabgabe. Bevorzugt ist bei der kleinstmöglichen Leistungsabgabe die Drehzahl kleiner als bei der größtmöglichen Leistungsabgabe. Die Leistungsabgabe kann auch bei gleichbleibender Drehzahl steigen oder fallen, dies entspricht einer unendlichen Steigung der Betriebskennlinie.Since the power output of the internal combustion engine increases monotonically with the speed along the operating characteristic curve, the power output at a first speed is at least as high as at a second speed if the first speed is higher than the second speed. As the speed increases, the power output never drops. At the lowest possible power output, the speed is no greater than at the highest possible power output. Preferably, at the lowest possible power output, the speed is lower than at the highest possible power output. The Power output can increase or decrease even at constant speed, which corresponds to an infinite slope of the operating characteristic.

Der Betrieb entlang einer vorbestimmten Betriebskennlinie bedeutet nicht, dass der Verbrennungsmotor niemals Betriebspunkte außerhalb der vorbestimmten Betriebskennlinie erreicht. Durch äußere Einflüsse kann sich der Betriebspunkt des Verbrennungsmotors von der vorbestimmten Betriebskennlinie lösen, der Verbrennungsmotor wird jedoch immer wieder auf die vorbestimmte Betriebskennlinie zurück geregelt. Bspw. kann ein plötzlicher Lastanstieg den Verbrennungsmotor abbremsen, dann wird die Leistungsabgabe des Motors gesteigert und dadurch der Verbrennungsmotor beschleunigt bis der Betriebspunkt wieder auf der vorbestimmten Betriebskennlinie liegt. Bei sinkender Last wird die Drehzahl des Verbrennungsmotors steigen, dann wird die Leistungsabgabe des Motors gedrosselt, sodass die Drehzahl des Verbrennungsmotors wieder sinkt, bis der Betriebspunkt wieder auf der vorbestimmten Betriebskennlinie liegt.Operating along a predetermined operating characteristic curve does not mean that the internal combustion engine never reaches operating points outside the predetermined operating characteristic curve. Due to external influences, the operating point of the internal combustion engine can move away from the predetermined operating characteristic curve, but the internal combustion engine is always regulated back to the predetermined operating characteristic curve. For example, a sudden increase in load can slow down the internal combustion engine, then the power output of the engine is increased and the internal combustion engine is thereby accelerated until the operating point is again on the predetermined operating characteristic curve. As the load decreases, the speed of the internal combustion engine will increase, then the power output of the engine is throttled so that the speed of the internal combustion engine drops again until the operating point is again on the predetermined operating characteristic curve.

Eine monoton steigende Betriebskennlinie ermöglicht einen komfortablen Betrieb. Eine Betriebskennlinie, die zum größten Teil unterhalb der Volllastkennlinie liegt ermöglicht einen effizienten Betrieb des Verbrennungsmotors.A monotonically increasing operating characteristic curve enables comfortable operation. An operating characteristic curve that is largely below the full-load characteristic curve enables efficient operation of the internal combustion engine.

Bevorzugt verläuft die vorbestimmte Betriebskennlinie zumindest abschnittsweise linear. Eine lineare Betriebskennlinie ermöglicht eine besonders einfache Regelung. Bevorzugt verläuft die vorbestimmte Betriebskennlinie zumindest abschnittsweise senkrecht. Eine senkrechte Betriebskennlinie bedeutet eine gleichbleibende Drehzahl bei schwankender Leistungsabgabe. Dies ermöglicht einen besonders komfortablen Betrieb, insbesondere für selbstfahrende Erntemaschinen.The predetermined operating characteristic curve preferably runs linearly, at least in sections. A linear operating characteristic curve enables particularly simple control. The predetermined operating characteristic curve preferably runs vertically at least in sections. A vertical operating characteristic curve means a constant speed with fluctuating power output. This enables particularly comfortable operation, especially for self-propelled harvesters.

Erfindungsgemäß weist die Betriebskennlinie bei der höchsten Drehzahl der Betriebskennlinie einen senkrechten Abschnitt auf. Im Bereich der höchsten Leistungsabgabe und damit der höchsten Drehzahl, da die Betriebskennlinie monoton ansteigt, ist ein komfortabler Betrieb und damit eine gleichbleibende Drehzahl bei schwankender Leistungsabgabe besonders wünschenswert.According to the invention, the operating characteristic curve has a vertical section at the highest speed of the operating characteristic curve. In the area of the highest power output and thus the highest speed, since the operating characteristic increases monotonically, comfortable operation and thus a constant speed with fluctuating power output is particularly desirable.

Bevorzugt steigt die vorbestimmte Betriebskennlinie unterhalb der höchsten Drehzahl streng monoton an. Eine streng monoton ansteigende Betriebskennlinie bedeutet, dass die Leistungsabgabe bei einer ersten Drehzahl höher ist als bei einer zweiten Drehzahl, wenn die erste Drehzahl höher ist als die zweite Drehzahl. Eine streng monoton steigende Betriebskennlinie ermöglicht insbesondere bei stark schwankenden Leistungsanforderungen eine einfache und effiziente Regelung.Preferably, the predetermined operating characteristic curve increases strictly monotonically below the highest speed. A strictly monotonically increasing operating characteristic means that the power output at a first speed is higher than at a second speed if the first speed is higher than the second speed. A strictly monotonically increasing operating characteristic curve enables simple and efficient control, especially with strongly fluctuating performance requirements.

Bevorzugt wird die vorbestimmte Betriebskennlinie aus einer Vielzahl an Betriebskennlinien ausgewählt. Die Betriebskennlinien können unterschiedliche Anforderungen erfüllen. Je nach Betriebssituation kann aus der Vielzahl an Betriebskennlinien die passende ausgewählt werden.The predetermined operating characteristic curve is preferably selected from a large number of operating characteristic curves. The operating characteristics can meet different requirements. Depending on the operating situation, the most suitable one can be selected from the large number of operating characteristics.

Bevorzugt erfolgt die Auswahl in Abhängigkeit einer Eingabe vom Bediener. In einer Ausgestaltung wählt der Bediener direkt die gewünschte Betriebskennlinie aus. In einer alternativen Ausgestaltung wählt der Bediener gewünschte Anforderungen ein Steuergerät wählt daraufhin die passende Betriebskennlinie aus.The selection is preferably made depending on an input from the operator. In one embodiment, the operator directly selects the desired operating characteristic. In an alternative embodiment, the operator selects the desired requirements and a control device then selects the appropriate operating characteristic.

Besonders bevorzugt erfolgt die Auswahl automatisch in Abhängigkeit einer Betriebssituation. Bei der Auswahl kann die Betriebssituation aus verschiedenen Sensorwerten bestimmt werden. Bspw. kann über einen Schichthöhensensor die Menge des zu verarbeitenden Ernteguts erkannt werden. Bei einer großen Menge Erntegut wird bevorzugt eine Betriebskennlinie gewählt, die für eine gleichbleibende Arbeitsqualität sorgt. Bei einer kleinen Menge Erntegut wird eine Betriebskennlinie gewählt, die für einen besonders effizienten Betrieb sorgt.The selection is particularly preferably carried out automatically depending on an operating situation. When making the selection, the operating situation can be determined from various sensor values. For example, the amount of crop to be processed can be detected using a layer height sensor. If there is a large amount of crop, it is preferred to choose an operating characteristic that ensures consistent work quality. For a small amount of crop, an operating characteristic curve is selected that ensures particularly efficient operation.

Die Erfindung betrifft ferner eine selbstfahrende Erntemaschine mit einem Verbrennungsmotor und einem Steuergerät, wobei das Steuergerät dazu vorgesehen und eingerichtet ist den Verbrennungsmotor gemäß einem der vorstehend beschriebenen Verfahren zu betreiben. Eine selbstfahrende Erntemaschine wird durch das Verfahren zur Ansteuerung des Verbrennungsmotors besonders komfortabel und effizient betrieben.The invention further relates to a self-propelled harvester with an internal combustion engine and a control device, the control device being intended and set up to operate the internal combustion engine according to one of the methods described above. A self-propelled harvester is operated particularly comfortably and efficiently thanks to the method for controlling the combustion engine.

Bevorzugt umfasst die selbstfahrende Erntemaschine zumindest ein Arbeitsorgan und einen Fahrantrieb und der Verbrennungsmotor ist dazu vorgesehen und eingerichtet sowohl den Fahrantrieb als auch das Arbeitsorgan mit Energie zu versorgen. Der Verbrennungsmotor ist sowohl mit dem Fahrantrieb als auch mit dem Arbeitsorgan verbunden und in der Lage sowohl den Fahrantrieb als auch das Arbeitsorgan mit Energie zu versorgen. Dadurch wird nur der Verbrennungsmotor als Energiequelle für beide Verbraucher benötigt.The self-propelled harvester preferably includes at least one working element and a travel drive and the internal combustion engine is intended and set up for this purpose to supply both the drive and the working organ with energy. The combustion engine is connected to both the traction drive and the working element and is able to supply both the traction drive and the working element with energy. This means that only the combustion engine is required as an energy source for both consumers.

Erfindungsgemäß umfasst die selbstfahrende Erntemaschine einen Elektromotor, wobei der Elektromotor dazu vorgesehen und eingerichtet ist den Verbrennungsmotor je nach Ansteuerung des Elektromotors zu unterstützen oder zu belasten. Vorteilhaft ist der Elektromotor mit einem Energiespeicher verbunden. Der Elektromotor kann Energie aus dem Energiespeicher entnehmen und Energie an den Energiespeicher abgeben. Steigt der Leistungsbedarf, so ist der Elektromotor in der Lage die zusätzliche Leistung aufzubringen bis der Verbrennungsmotor auf einen Betriebspunkt eingestellt ist, in dem er den Leistungsbedarf decken kann. Vorteilhaft kann der Elektromotor auch Energie in den Energiespeicher einbringen. Sinkt der Leistungsbedarf, so ist der Elektromotor in der Lage vom Verbrennungsmotor abgegebene aber von Fahrantrieb und Arbeitsorgan nicht benötigte Energie umzuwandeln und in dem Energiespeicher zu lagern. Der Energiespeicher kann bspw. als Kondensator, Akkumulator oder kinetischer Energiespeicher ausgestaltet sein. Der Elektromotor ist dadurch in der Lage die Ansteuerung des Verbrennungsmotors zu verbessern.According to the invention, the self-propelled harvester comprises an electric motor, the electric motor being intended and set up to support or load the internal combustion engine depending on the control of the electric motor. The electric motor is advantageously connected to an energy storage device. The electric motor can take energy from the energy storage and deliver energy to the energy storage. If the power requirement increases, the electric motor is able to generate the additional power until the internal combustion engine is set to an operating point at which it can cover the power requirement. The electric motor can also advantageously introduce energy into the energy storage. If the power requirement drops, the electric motor is able to convert energy emitted by the combustion engine but not required by the drive and working element and store it in the energy storage device. The energy storage can be designed, for example, as a capacitor, accumulator or kinetic energy storage. The electric motor is therefore able to improve the control of the internal combustion engine.

In einer Ausgestaltung ist die Arbeitsgeschwindigkeit des zumindest einen Arbeitsorgans an die Drehzahl des Verbrennungsmotors gekoppelt. Eine Kopplung der Arbeitsgeschwindigkeit des zumindest einen Arbeitsorgans an die Drehzahl des Verbrennungsmotors kann bspw. über eine mechanische Verbindung zwischen Verbrennungsmotor und Arbeitsorgan gegeben sein. Eine solche Verbindung ist häufig sehr effizient in der Energieübertragung. Eine schwankende Arbeitsgeschwindigkeit des Arbeitsorgans ist allerdings häufig schlecht für das Arbeitsergebnis. Eine gleichbleibende Drehzahl bewirkt in dieser Ausgestaltung eine gleichbleibende Arbeitsgeschwindigkeit des Arbeitsorgans und damit ein gleichbleibend gutes Arbeitsergebnis. Eine gleichbleibende Drehzahl wird insbesondere durch eine hohe Steigung der Betriebskennlinie oder eine senkrechte Betriebskennlinie erreicht. Eine gleichbleibende Arbeitsgeschwindigkeit und damit eine gleichbleibende Drehzahl des Verbrennungsmotors ist insbesondere bei einer hohen Leistungsanforderung und damit einer hohen Leistungsabgabe des Verbrennungsmotors vorteilhaft.In one embodiment, the working speed of the at least one working element is coupled to the speed of the internal combustion engine. A coupling of the working speed of the at least one working element to the speed of the internal combustion engine can be achieved, for example, via a mechanical connection between the internal combustion engine and the working element. Such a connection is often very efficient in energy transfer. However, a fluctuating working speed of the work organ is often bad for the work result. In this embodiment, a constant speed causes a constant working speed of the working element and thus a consistently good work result. A constant speed is achieved in particular by a high slope of the operating characteristic curve or a vertical operating characteristic curve. A constant working speed and therefore a constant speed of the internal combustion engine particularly advantageous when there is a high power requirement and thus a high power output from the internal combustion engine.

Bevorzugt ist die Fahrgeschwindigkeit der selbstfahrenden Erntemaschine von der Drehzahl des Verbrennungsmotors unabhängig. Eine Unabhängigkeit der Fahrgeschwindigkeit von der Drehzahl des Verbrennungsmotors lässt sich bspw. über eine verstellbare hydraulische Kupplung erreichen. Über die verstellbare hydraulische Kupplung kann die vom Verbrennungsmotor an den Fahrantrieb übertragene Leistung unabhängig von der Drehzahl und der Leistungsabgabe des Verbrennungsmotors eingestellt werden. Bei einer selbstfahrenden Erntemaschine bestimmt die Fahrgeschwindigkeit im allgemeinen wie viel Erntegut von der Erntemaschine aufgenommen wird und von den Arbeitsorganen verarbeitet werden muss und damit den Leistungsbedarf der Arbeitsorgane. Durch die von der Drehzahl des Verbrennungsmotors unabhängig einstellbare Fahrgeschwindigkeit lässt sich also die benötigte Leistungsabgabe des Verbrennungsmotors beeinflussen.The driving speed of the self-propelled harvester is preferably independent of the speed of the internal combustion engine. Independence of the driving speed from the speed of the combustion engine can be achieved, for example, using an adjustable hydraulic clutch. Using the adjustable hydraulic clutch, the power transmitted from the combustion engine to the traction drive can be adjusted independently of the speed and power output of the combustion engine. In the case of a self-propelled harvester, the driving speed generally determines how much crop is picked up by the harvester and has to be processed by the work organs and thus the power requirements of the work organs. The required power output of the internal combustion engine can be influenced by the driving speed, which can be set independently of the speed of the internal combustion engine.

Im Folgenden wird die Erfindung an Ausführungsbeispielen näher erläutert. Dabei zeigt

  • Figur 1 ein Verbrauchsdiagramm eines Verbrennungsmotors,
  • Figur 2 eine monoton steigende Betriebskennlinie in einem Verbrauchsdiagramm,
  • Figur 3 eine vertikale Betriebskennlinie in einem Verbrauchsdiagramm,
  • Figur 4 eine monoton steigende Betriebskennlinie mit einem vertikalen Abschnitt,
  • Figur 5 eine selbstfahrende Erntemaschine.
The invention is explained in more detail below using exemplary embodiments. This shows
  • Figure 1 a consumption diagram of an internal combustion engine,
  • Figure 2 a monotonically increasing operating characteristic curve in a consumption diagram,
  • Figure 3 a vertical operating characteristic curve in a consumption diagram,
  • Figure 4 a monotonically increasing operating characteristic curve with a vertical section,
  • Figure 5 a self-propelled harvester.

In Figur 1 ist ein vereinfachtes Verbrauchsdiagramm eines beispielhaften Verbrennungsmotors dargestellt. Auf der waagerechten Achse ist dabei die Drehzahl 4 des Verbrennungsmotors aufgetragen. Dabei steigt die Drehzahl 4 von links nach rechts an. Auf der senkrechten Achse ist die Leistungsabgabe 3 des Verbrennungsmotors aufgetragen. Dabei steigt die Leistungsabgabe 3 von unten nach oben an. Die möglichen Betriebspunkte des Verbrennungsmotors werden durch die Volllastkennlinie 6 begrenzt. Die Volllastkennlinie 6 gibt an wie groß die Leistungsabgabe 3 des Verbrennungsmotors bei einer bestimmten Drehzahl 4 maximal sein kann. Auf der Volllastkennlinie befindet sich ein erster Betriebspunkt 5 mit der maximalen Leistungsabgabe des Verbrennungsmotors. Die Verbrauchskennlinien 12, 13, 14 verbinden Betriebspunkte mit gleichen spezifischen Kraftstoffverbrauches. Dabei ist der spezifische Kraftstoffverbrauch im Allgemeinen in der Nähe der Volllastkennlinie 3 größer als im inneren Bereich des Verbrauchsdiagramms. Im inneren Bereich der innersten Verbrauchskennlinie 12 arbeitet der Verbrennungsmotor am effizientesten, da dort der spezifische Kraftstoffverbrauch des Verbrennungsmotors am niedrigsten ist.In Figure 1 a simplified consumption diagram of an exemplary internal combustion engine is shown. The speed 4 of the internal combustion engine is plotted on the horizontal axis. The speed 4 increases from left to right. The power output 3 of the internal combustion engine is plotted on the vertical axis. The power output 3 increases from bottom to top. The possible ones Operating points of the internal combustion engine are limited by the full load characteristic curve 6. The full-load characteristic curve 6 indicates the maximum power output 3 of the internal combustion engine can be at a certain speed 4. On the full-load characteristic curve there is a first operating point 5 with the maximum power output of the internal combustion engine. The consumption characteristics 12, 13, 14 connect operating points with the same specific fuel consumption. The specific fuel consumption is generally greater near the full-load characteristic curve 3 than in the inner area of the consumption diagram. The internal combustion engine works most efficiently in the inner area of the innermost consumption characteristic curve 12, since the specific fuel consumption of the internal combustion engine is lowest there.

In Figur 2 ist eine monoton steigende Betriebskennlinie 2 in einem Verbrauchsdiagramm dargestellt. Im Folgenden werden nur die Unterschiede zu Figur 1 erläutert. Die Betriebskennlinie 2 entlang derer der Verbrennungsmotor betrieben wird erstreckt sich von dem ersten Betriebspunkt 5 bei einer ersten Drehzahl mit maximaler Leistungsabgabe 3 zu einem zweiten Betriebspunkt 15 bei einer zweiten Drehzahl mit minimaler Leistungsabgabe 3. Die Betriebskennlinie ist in diesem Beispiel durchgehend linear und streng monoton steigend. Die erste Drehzahl ist kleiner als die zweite Drehzahl und die Leistungsabgabe 3 steigt mit der Drehzahl 4 linear an. Die Betriebskennlinie 2 geht durch den Bereich der innersten Verbrauchskennlinie 12 in der der spezifische Kraftstoffverbrauch besonders niedrig ist. Diese Betriebskennlinie 2 ermöglicht einen besonders effizienten Betrieb des Verbrennungsmotors.In Figure 2 a monotonically increasing operating characteristic curve 2 is shown in a consumption diagram. Below are just the differences Figure 1 explained. The operating characteristic curve 2 along which the internal combustion engine is operated extends from the first operating point 5 at a first speed with maximum power output 3 to a second operating point 15 at a second speed with minimum power output 3. In this example, the operating characteristic curve is continuously linear and strictly monotonically increasing . The first speed is smaller than the second speed and the power output 3 increases linearly with the speed 4. The operating characteristic curve 2 goes through the area of the innermost consumption characteristic curve 12 in which the specific fuel consumption is particularly low. This operating characteristic curve 2 enables particularly efficient operation of the internal combustion engine.

In Figur 3 ist eine vertikale Betriebskennlinie 2 in einem Verbrauchsdiagramm dargestellt. Im Folgenden werden nur die Unterschiede zu Figur 1 erläutert. Die Betriebskennlinie 2 entlang derer der Verbrennungsmotor betrieben wird erstreckt sich von einem dritten Betriebspunkt 16 bei der ersten Drehzahl mit minimaler Leistungsabgabe zu dem ersten Betriebspunkt 5 bei der ersten Drehzahl mit maximaler Leistungsabgabe. Die Betriebskennlinie 2 ist in diesem Beispiel vertikal. Die Drehzahl 4 ist an allen Punkten der Betriebskennlinie 2 identisch. Diese Betriebskennlinie 2 ermöglicht einen besonders komfortablen Betrieb des Verbrennungsmotors und sorgt durch die gleichbleibende Drehzahl für eine gleichbleibende Arbeitsqualität.In Figure 3 is a vertical operating characteristic curve 2 shown in a consumption diagram. Below are just the differences Figure 1 explained. The operating characteristic curve 2 along which the internal combustion engine is operated extends from a third operating point 16 at the first speed with minimum power output to the first operating point 5 at the first speed with maximum power output. The operating characteristic curve 2 is vertical in this example. Speed 4 is identical at all points on operating characteristic curve 2. This operating characteristic curve 2 enables particularly comfortable operation of the internal combustion engine and ensures consistent work quality thanks to the constant speed.

In Figur 4 ist eine monoton steigende Betriebskennlinie 2 mit einem vertikalen Abschnitt in einem Verbrauchsdiagramm dargestellt. Die Betriebskennlinie 2 kombiniert einen senkrechten Abschnitt im Bereich hoher Leistungsabgabe mit einem linear steigenden Abschnitt im Bereich niedriger Leistungsabgabe. Die Betriebskennlinie 2 erstreckt sich von dem ersten Betriebspunkt 5 bei der ersten Drehzahl mit maximaler Leistungsabgabe über einen vierten Betriebspunkt 17 bei der ersten Drehzahl mit mittlerer Leistungsabgabe zu dem zweiten Betriebspunkt 15 bei der zweiten Drehzahl mit minimaler Leistungsabgabe.In Figure 4 a monotonically increasing operating characteristic curve 2 with a vertical section is shown in a consumption diagram. The operating characteristic curve 2 combines a vertical section in the area of high power output with a linearly increasing section in the area of low power output. The operating characteristic curve 2 extends from the first operating point 5 at the first speed with maximum power output via a fourth operating point 17 at the first speed with average power output to the second operating point 15 at the second speed with minimum power output.

In Figur 5 ist eine monoton steigende Betriebskennlinie 2 mit mehreren vertikalen Abschnitten in einem Verbrauchsdiagramm dargestellt. Die Betriebskennlinie 2 erstreckt sich von dem ersten Betriebspunkt 5 bei der ersten Drehzahl mit maximaler Leistungsabgabe über den vierten Betriebspunkt 17 bei der ersten Drehzahl und der mittleren Leistungsabgabe, einen fünften Betriebspunkt 18 bei einer dritten Drehzahl und der gleichen Leistungsabgabe wie am vierten Betriebspunkt 17, einen sechsten Betriebspunkt 19 bei der dritten Drehzahl mit geringer Leistungsabgabe, einen siebten Betriebspunkt 20 bei der zweiten Drehzahl und der gleichen Leistungsabgabe wie am sechsten Betriebspunkt 19 zu dem zweiten Betriebspunkt 15 bei der zweiten Drehzahl mit minimaler Leistungsabgabe. Die dritte Drehzahl ist dabei geringer als die erste Drehzahl und größer als die zweite Drehzahl. Diese Betriebskennlinie 2 kombiniert den Komfort auf den senkrechten Abschnitten mit einem effizienten Verlauf durch den Bereich des niedrigsten spezifischen Verbrauchs.In Figure 5 a monotonically increasing operating characteristic curve 2 with several vertical sections is shown in a consumption diagram. The operating characteristic curve 2 extends from the first operating point 5 at the first speed with maximum power output over the fourth operating point 17 at the first speed and the average power output, a fifth operating point 18 at a third speed and the same power output as at the fourth operating point 17, one sixth operating point 19 at the third speed with low power output, a seventh operating point 20 at the second speed and the same power output as at the sixth operating point 19 to the second operating point 15 at the second speed with minimal power output. The third speed is lower than the first speed and higher than the second speed. This operating characteristic curve 2 combines comfort on the vertical sections with an efficient progression through the area of lowest specific consumption.

In Figur 6 ist eine monoton steigende Betriebskennlinie 2 mit mehreren vertikalen Abschnitten und einem schräg ansteigenden Abschnitt in einem Verbrauchsdiagramm dargestellt. Die Betriebskennlinie erstreckt sich von dem ersten Betriebspunkt 5 bei der ersten Drehzahl mit maximaler Leistungsabgabe über den vierten Betriebspunkt 17 bei der ersten Drehzahl und der mittleren Leistungsabgabe, den fünften Betriebspunkt 18 bei der dritten Drehzahl und der gleichen Leistungsabgabe wie am vierten Betriebspunkt 17, den sechsten Betriebspunkt 19 bei der dritten Drehzahl mit geringer Leistungsabgabe zu dem zweiten Betriebspunkt 15 bei der zweiten Drehzahl mit minimaler Leistungsabgabe. Diese Betriebskennlinie kombiniert den Komfort auf den senkrechten Abschnitten mit einem effizienten Verlauf durch den Bereich des niedrigsten spezifischen Verbrauchs.In Figure 6 a monotonically increasing operating characteristic curve 2 with several vertical sections and an obliquely increasing section is shown in a consumption diagram. The operating characteristic curve extends from the first operating point 5 at the first speed with maximum power output to the fourth operating point 17 at the first speed and the average power output, the fifth operating point 18 at the third speed and the same power output as at the fourth operating point 17, the sixth Operating point 19 at the third speed with low power output to the second operating point 15 at the second speed with minimal power output. This operating characteristic combines comfort on the vertical Sections with an efficient progression through the area of lowest specific consumption.

In Figur 7 ist eine selbstfahrende Erntemaschine 7 in Form eines Feldhäckslers dargestellt. Die selbstfahrende Erntemaschine 7 wird durch einen Feldbestand 21, bspw. ein Maisfeld, gefahren. Ein Gutfluss 22 aus Pflanzenteilen wird während des Betriebs durch einen Einzugskanal 23 eingezogen und zum Zwecke der weiteren Zerkleinerung einem Arbeitsorgan 9, hier einer Häckslertrommel, zugeführt. Weiterhin umfasst die selbstfahrende Erntemaschine 7 einen Fahrantrieb 10 mit einer Antriebsachse für Antriebsräder (nicht dargestellt).In Figure 7 a self-propelled harvester 7 is shown in the form of a forage harvester. The self-propelled harvester 7 is driven through a field 21, for example a corn field. A crop flow 22 made of plant parts is drawn in during operation through a feed channel 23 and fed to a working element 9, here a chopper drum, for the purpose of further shredding. Furthermore, the self-propelled harvester 7 includes a travel drive 10 with a drive axle for drive wheels (not shown).

Außerdem verfügt die selbstfahrende Erntemaschine 7 über einen Verbrennungsmotor 1. Der Verbrennungsmotor 1 dient sowohl zum Antrieb des Fahrantriebs 10 als auch, und zwar gleichzeitig, zum Antrieb verschiedener Arbeitsorgane 9. Dazu ist ein Antriebsstrang 24 vorgesehen, der sich in zumindest zwei Teilantriebsstränge 25, 26 aufteilt. Der erste Teilantriebsstrang 25 ist zum Übertragen von Antriebsleistung des Verbrennungsmotors 1 an das Arbeitsorgan 9 vorgesehen. Der zweite Teilantriebsstrang 26 ist zum Übertragen von Antriebsleistung an den Fahrantrieb 10 vorgesehen.In addition, the self-propelled harvester 7 has an internal combustion engine 1. The internal combustion engine 1 serves both to drive the traction drive 10 and, at the same time, to drive various working elements 9. For this purpose, a drive train 24 is provided, which is divided into at least two partial drive trains 25, 26 divides. The first partial drive train 25 is intended for transmitting drive power from the internal combustion engine 1 to the working element 9. The second partial drive train 26 is intended for transmitting drive power to the traction drive 10.

In Figur 7 ist außerdem ein Steuergerät 8 dargestellt. In dem Steuergerät 8 ist zumindest eine Betriebskennlinie 2 hinterlegt. Die hinterlegte Betriebskennlinie 2 kann bspw. eine der in den Figuren 2 bis 6 dargestellten Betriebskennlinien 2 sein. Das Steuergerät 8 steuert den Verbrennungsmotor 1 entlang der hinterlegten Betriebskennlinie 2. Dazu ist ein Drehzahl- und/oder Drehmomentsensor am Antriebsstrang 24 vorgesehen.In Figure 7 A control device 8 is also shown. At least one operating characteristic curve 2 is stored in the control unit 8. The stored operating characteristic curve 2 can, for example, be one of the ones in the Figures 2 to 6 operating characteristics shown can be 2. The control unit 8 controls the internal combustion engine 1 along the stored operating characteristic curve 2. For this purpose, a speed and/or torque sensor is provided on the drive train 24.

Sind auf dem Steuergerät 8 mehrere Betriebskennlinien 2 hinterlegt, so kann der Bediener über ein Eingabgegerät 28 eine der Betriebskennlinien auswählen.If several operating characteristics 2 are stored on the control device 8, the operator can select one of the operating characteristics via an input device 28.

In der dargestellten Ausführungsform umfasst die selbstfahrende Erntemaschine neben dem Verbrennungsmotor 1 einen Elektromotor 11. Der Elektromotor 11 ist über einen dritten Teilantriebsstrang 27 mit dem Antriebsstrang 12 verbunden und kann den Verbrennungsmotor 1 unterstützen oder belasten. Der Elektromotor 11 ist mit einem Energiespeicher 29 verbunden. Der Elektromotor 11 kann aus dem Energiespeicher 29 Energie entnehmen, um den Verbrennungsmotor 1 zu unterstützen und bei Belastung des Verbrennungsmotors 1 Energie im Energiespeicher 29 ablegen. Das Steuergerät 8 ist mit dem Elektromotor 11 verbunden und regelt ob und wie stark der Elektromotor 11 den Verbrennungsmotor 1 unterstützt oder belastet. Wenn der Leistungsbedarf steigt, bspw. weil der Feldbestand 21 dichter wird, und dadurch die Drehzahl 4 am Antriebsstrang 12 sinkt, da die Leistungsabgabe des Verbrennungsmotors 1 nicht ausreicht, so gibt der Elektromotor 11 Drehmoment an den Antriebsstrang 12 ab und unterstützt so den Verbrennungsmotor 1, bis der Verbrennungsmotor 1 einen Betriebspunkt erreicht hat, in dem die Leistungsabgabe des Verbrennungsmotors 1 dem Leistungsbedarf entspricht. Wenn der Leistungsbedarf sinkt und dadurch die Drehzahl 4 am Antriebsstrang 12 steigt, da die Leistungsabgabe des Verbrennungsmotors 1 größer ist also der Leistungsbedarf, so belastet der Elektromotor 11 den Antriebsstrang 12 bis der Verbrennungsmotor 1 einen Betriebspunkt erreicht hat, in dem die Leistungsabgabe des Verbrennungsmotors 1 dem Leistungsbedarf entspricht.In the illustrated embodiment, the self-propelled harvester includes an electric motor 11 in addition to the internal combustion engine 1. The electric motor 11 is connected to the drive train 12 via a third partial drive train 27 and can support or load the internal combustion engine 1. The electric motor 11 is connected to an energy storage device 29. The electric motor 11 can take energy from the energy storage 29 to support the internal combustion engine 1 and under load of the internal combustion engine 1 store energy in the energy storage 29. The control unit 8 is connected to the electric motor 11 and regulates whether and to what extent the electric motor 11 supports or loads the internal combustion engine 1. If the power requirement increases, for example because the field population 21 becomes denser, and as a result the speed 4 on the drive train 12 drops because the power output of the internal combustion engine 1 is not sufficient, the electric motor 11 delivers torque to the drive train 12 and thus supports the internal combustion engine 1 until the internal combustion engine 1 has reached an operating point in which the power output of the internal combustion engine 1 corresponds to the power requirement. If the power requirement drops and the speed 4 on the drive train 12 increases as a result, since the power output of the internal combustion engine 1 is greater, i.e. the power requirement, the electric motor 11 loads the drive train 12 until the internal combustion engine 1 has reached an operating point in which the power output of the internal combustion engine 1 corresponds to the power requirement.

BezugszeichenlisteReference symbol list

11
VerbrennungsmotorInternal combustion engine
22
BetriebskennlinieOperating characteristic curve
33
LeistungsabgabePower output
44
Drehzahlnumber of revolutions
55
Erster Betriebspunkt mit maximaler LeistungsabgabeFirst operating point with maximum power output
66
VolllastkennlinieFull load characteristic
77
Selbstfahrende ErntemaschineSelf-propelled harvester
88th
SteuergerätControl unit
99
ArbeitsorganWorking body
1010
Fahrantriebtraction drive
1111
ElektromotorElectric motor
12-1412-14
VerbrauchskennlinienConsumption characteristics
1515
Zweiter Betriebspunkt mit der minimaler LeistungsabgabeSecond operating point with the minimum power output
1616
Dritter Betriebspunkt mit minimaler LeistungsabgabeThird operating point with minimal power output
17-2017-20
BetriebspunkteOperating points
2121
FeldbestandField stock
2222
GutflussGood flow
2323
Einzugskanalintake channel
2424
AntriebsstrangDrivetrain
25-2725-27
TeilantriebssträngePartial powertrains
2828
EingabegerätInput device
2929
EnergiespeicherEnergy storage
3030
Sensorsensor

Claims (10)

  1. A method for controlling a combustion engine (1) and an electric motor (11), wherein the combustion engine (1) is operated along a predetermined operating characteristic (2), characterized in that the power output (3) of the combustion engine (1) increases monotonically with the rotational speed (4) along the operating characteristic (2), wherein the operating characteristic (2), with the exception of the operating point with the maximum power output (5), lies under the full load characteristic (6) and at the highest rotational speed of the operating characteristic, the predetermined operating characteristic (2) has a perpendicular section and the electric motor (11) is provided and configured to support or to load the combustion engine (1) depending on the control of the electric motor (11), wherein a control device (8) is provided and configured to connect the combustion engine (1) to the electric motor (11) in a manner such that the control unit (8) controls whether and to what extent the electric motor (11) supports or loads the combustion engine (1).
  2. The method according to claim 1, characterized in that the predetermined operating characteristic (2), at least in sections, is linear.
  3. The method according to claim 2, characterized in that the predetermined operating characteristic (2), at least in sections, is perpendicular.
  4. The method according to one of the preceding claims, characterized in that below the highest rotational speed, the predetermined operating characteristic (2) is strictly monotonically increasing.
  5. The method according to one of the preceding claims, characterized in that the predetermined operating characteristic (2) is selected from a plurality of operating characteristics.
  6. The method according to claim 5, characterized in that the selection is carried out as a function of an input from the operator.
  7. The method according to claim 5, characterized in that the selection is carried out automatically as a function of an operating situation.
  8. A self-propelled harvesting machine (7) for carrying out the method according to claim 1, characterized in that the self-propelled harvesting machine (7) comprises at least one working unit (9) and a propulsion unit (10) and the combustion engine 91) is provided and configured to provide energy to both the propulsion unit (10) as well as the working unit (9).
  9. The self-propelled harvesting machine (7) according to claim 8, characterized in that the working speed of the at least one working unit (9) is coupled to the rotational speed (4) of the combustion engine (1).
  10. The self-propelled harvesting machine (7) according to one of claims 8 to 9, characterized in that the travel speed of the self-propelled harvesting machine (7) is independent of the rotational speed (4) of the combustion engine (1).
EP20155837.6A 2019-06-18 2020-02-06 Method for controlling a combustion engine Active EP3754172B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019116447.8A DE102019116447A1 (en) 2019-06-18 2019-06-18 Method for controlling an internal combustion engine

Publications (2)

Publication Number Publication Date
EP3754172A1 EP3754172A1 (en) 2020-12-23
EP3754172B1 true EP3754172B1 (en) 2023-11-08

Family

ID=69526039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20155837.6A Active EP3754172B1 (en) 2019-06-18 2020-02-06 Method for controlling a combustion engine

Country Status (2)

Country Link
EP (1) EP3754172B1 (en)
DE (1) DE102019116447A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113494377B (en) * 2021-08-17 2022-06-28 柳州柳工挖掘机有限公司 Energy-saving control method of electric control engine and engineering machinery
CN113586273B (en) * 2021-08-17 2023-09-12 柳州柳工挖掘机有限公司 Rotating speed control method of electric control engine and engineering machinery

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2223588B1 (en) * 2009-02-27 2011-11-23 Deere & Company Automotive harvesting machine
EP3257353B1 (en) * 2016-06-14 2019-09-25 CLAAS Selbstfahrende Erntemaschinen GmbH Agricultural machine and method for operating an agricultural machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004150304A (en) * 2002-10-29 2004-05-27 Komatsu Ltd Controller of engine
DE102008020497A1 (en) 2008-04-23 2009-11-05 Claas Selbstfahrende Erntemaschinen Gmbh Operating method for an internal combustion engine
BE1018875A3 (en) * 2009-09-01 2011-10-04 Cnh Belgium Nv AGRICULTURAL MACHINE WITH VARIABLE SPEED CONTROL.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2223588B1 (en) * 2009-02-27 2011-11-23 Deere & Company Automotive harvesting machine
EP3257353B1 (en) * 2016-06-14 2019-09-25 CLAAS Selbstfahrende Erntemaschinen GmbH Agricultural machine and method for operating an agricultural machine

Also Published As

Publication number Publication date
DE102019116447A1 (en) 2020-12-24
EP3754172A1 (en) 2020-12-23

Similar Documents

Publication Publication Date Title
EP3298876B1 (en) Forage harvester
EP2112357B1 (en) Operating method for an internal combustion engine
EP3754172B1 (en) Method for controlling a combustion engine
EP3259975B1 (en) Agricultural work machine and method for operating an agricultural work machine
EP1946631B1 (en) Agricultural work machine
EP2057881A2 (en) Motor regulation of a self-propelled work machine
EP3760027B1 (en) Drive system for a harvester
EP2952087A1 (en) Drive system for a self-propelled harvesting machine
EP3257353B1 (en) Agricultural machine and method for operating an agricultural machine
EP3326446B1 (en) Speed control of a harvesting machine
EP2857246B1 (en) Agricultural work machine
DE102010003940A1 (en) Drive system for e.g. agricultural tractor, has control device provided in cooperation with combustion engine and hybrid unit, and operated independent of abruptly varying power at drive train in predetermined target operating points
DE102004056233A1 (en) Agricultural working machine with a drive motor
EP3300584B1 (en) Agricultural machine and method for operating an agricultural machine
EP2186702A2 (en) Drive system of a commercial vehicle and method for controlling a drive system of a commercial vehicle
EP3888443A1 (en) Agricultural machine
DE19705841A1 (en) Fan speed regulation method for cleaning of combine harvester
EP3459331B1 (en) Agricultural machine
EP4272537A1 (en) Self-propelled agricultural working machine
EP3837958A1 (en) Method for driving an agricultural machine
DE102020112451A1 (en) Agricultural work machine
DE102022204578A1 (en) METHOD FOR CONTROLLING A HYDROSTATIC DRIVE
DE102022130291A1 (en) Self-propelled harvester
EP4360434A1 (en) Agricultural machine with a state determining device
EP3906771A1 (en) Agricultural machine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210623

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230516

INTG Intention to grant announced

Effective date: 20230614

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502020005912

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240308

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240308

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240209

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240208

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240308

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240219

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240208

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20240229

Year of fee payment: 5

Ref country code: FR

Payment date: 20240222

Year of fee payment: 5

Ref country code: BE

Payment date: 20240219

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231108