EP3754172B1 - Procédé de commande d'un moteur à combustion interne - Google Patents

Procédé de commande d'un moteur à combustion interne Download PDF

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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
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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
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German (de)
English (en)
Other versions
EP3754172A1 (fr
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/fr
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Publication of EP3754172B1 publication Critical patent/EP3754172B1/fr
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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.

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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)
  • Hybrid Electric Vehicles (AREA)

Claims (10)

  1. Procédé de commande d'un moteur à combustion interne (1) et d'un moteur électrique (11), le moteur à combustion interne (1) étant exploité suivant une courbe caractéristique d'exploitation prédéterminée (2), caractérisé en ce que la puissance délivrée (3) du moteur à combustion interne (1) augmente de façon monotone avec la vitesse de rotation (4) suivant la courbe caractéristique d'exploitation (2), la courbe caractéristique d'exploitation (2) se trouvant au-dessous de la courbe caractéristique de pleine charge (6) à l'exception du point de fonctionnement à puissance délivrée maximale (5), et la courbe caractéristique d'exploitation prédéterminée (2) présentant une portion verticale à la vitesse de rotation la plus élevée de la courbe caractéristique d'exploitation, et le moteur électrique (11) étant prévu et agencé pour assister ou pour soulager le moteur à combustion interne (1) selon la commande du moteur électrique (11), un appareil de commande (8) étant prévu et agencé pour relier le moteur à combustion interne (1) au moteur électrique (11) de façon que l'appareil de commande (8) détermine si et dans quelle mesure le moteur électrique (11) assiste ou soulage le moteur à combustion interne (1).
  2. Procédé selon la revendication 1, caractérisé en ce que la courbe caractéristique d'exploitation prédéterminée (2) s'étend de manière linéaire au moins par portions.
  3. Procédé selon la revendication 2, caractérisé en ce que la courbe caractéristique d'exploitation prédéterminée (2) s'étend de manière verticale au moins par portions.
  4. Procédé selon une des revendications précédentes, caractérisé en ce que la courbe caractéristique d'exploitation prédéterminée (2) augmente de façon rigoureusement monotone au-dessous de la vitesse de rotation la plus élevée.
  5. Procédé selon une des revendications précédentes, caractérisé en ce que la courbe caractéristique d'exploitation prédéterminée (2) est sélectionnée parmi une pluralité de courbes caractéristiques d'exploitation.
  6. Procédé selon la revendication 5, caractérisé en ce que la sélection s'effectue en fonction d'une entrée de l'utilisateur.
  7. Procédé selon la revendication 5, caractérisé en ce que la sélection s'effectue automatiquement en fonction d'une situation de fonctionnement.
  8. Machine de récolte automotrice (7) pour réaliser le procédé selon la revendication 1, caractérisée en ce que la machine de récolte automotrice (7) inclut au moins un organe de travail (9) et un ensemble propulseur (10) et le moteur à combustion interne (1) est prévu et agencé pour alimenter en énergie aussi bien l'ensemble propulseur (10) que l'organe de travail (9).
  9. Machine de récolte automotrice (7) selon la revendication 8, caractérisée en ce que la vitesse de travail du au moins un organe de travail (9) est couplée à la vitesse de rotation (4) du moteur à combustion interne (1).
  10. Machine de récolte automotrice (7) selon une des revendications 8 à 9, caractérisée en ce que la vitesse de marche de la machine de récolte automotrice (7) est indépendante de la vitesse de rotation (4) du moteur à combustion interne (1).
EP20155837.6A 2019-06-18 2020-02-06 Procédé de commande d'un moteur à combustion interne Active EP3754172B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019116447.8A DE102019116447A1 (de) 2019-06-18 2019-06-18 Verfahren zur Ansteuerung eines Verbrennungsmotors

Publications (2)

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EP3754172A1 EP3754172A1 (fr) 2020-12-23
EP3754172B1 true EP3754172B1 (fr) 2023-11-08

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DE (1) DE102019116447A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113586273B (zh) * 2021-08-17 2023-09-12 柳州柳工挖掘机有限公司 一种电控发动机的转速控制方法和工程机械
CN113494377B (zh) * 2021-08-17 2022-06-28 柳州柳工挖掘机有限公司 一种电控发动机的节能控制方法和工程机械

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2223588B1 (fr) * 2009-02-27 2011-11-23 Deere & Company Récolteuse automobile
EP3257353B1 (fr) * 2016-06-14 2019-09-25 CLAAS Selbstfahrende Erntemaschinen GmbH Machine agricole et procede de fonctionnement d'une machine agricole

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004150304A (ja) * 2002-10-29 2004-05-27 Komatsu Ltd エンジンの制御装置
DE102008020497A1 (de) 2008-04-23 2009-11-05 Claas Selbstfahrende Erntemaschinen Gmbh Betriebsverfahren für einen Verbrennungsmotor
BE1018875A3 (nl) * 2009-09-01 2011-10-04 Cnh Belgium Nv Landbouwmachine met variabele toerentalregeling.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2223588B1 (fr) * 2009-02-27 2011-11-23 Deere & Company Récolteuse automobile
EP3257353B1 (fr) * 2016-06-14 2019-09-25 CLAAS Selbstfahrende Erntemaschinen GmbH Machine agricole et procede de fonctionnement d'une machine agricole

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DE102019116447A1 (de) 2020-12-24

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