EP4153854B1 - Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur - Google Patents

Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur Download PDF

Info

Publication number
EP4153854B1
EP4153854B1 EP21727228.5A EP21727228A EP4153854B1 EP 4153854 B1 EP4153854 B1 EP 4153854B1 EP 21727228 A EP21727228 A EP 21727228A EP 4153854 B1 EP4153854 B1 EP 4153854B1
Authority
EP
European Patent Office
Prior art keywords
idle speed
tractor
speed value
signal
value
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
EP21727228.5A
Other languages
German (de)
English (en)
Other versions
EP4153854A1 (fr
Inventor
Massimo Ribaldone
Simone Tremolada
Giorgio GAVINA
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.)
Same Deutz Fahr Italia SpA
Original Assignee
Same Deutz Fahr Italia SpA
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 Same Deutz Fahr Italia SpA filed Critical Same Deutz Fahr Italia SpA
Publication of EP4153854A1 publication Critical patent/EP4153854A1/fr
Application granted granted Critical
Publication of EP4153854B1 publication Critical patent/EP4153854B1/fr
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
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • F02D31/008—Electric control of rotation speed controlling fuel supply for idle speed control
    • 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
    • F02D41/0205—Circuit arrangements for generating control signals using an auxiliary engine speed control
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/086—Introducing corrections for particular operating conditions for idling taking into account the temperature 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
    • F02D2200/021—Engine temperature
    • 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
    • F02D2200/023—Temperature of lubricating oil or working fluid
    • 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
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/501—Vehicle 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

Definitions

  • the present invention relates to a method for generating a command signal of the idle speed value for a combustion engine of a tractor. Furthermore, the present invention relates to a control unit for a tractor and a tractor or compact tractor comprising such a control unit.
  • tractor means both agricultural tractors and, more in general, large machines, such as earth-moving machines, preferably derived from agricultural tractors or off-highway machines, i.e., in general, specific machines for power operations, e.g., actions directly on the ground, such as tilling, or actions for loading and unloading material.
  • compact tractor means the type of vehicle typically of small size, e.g., used in the vineyard sector.
  • the context in which the present invention finds specific application is the agricultural and/or off-highway vehicle sector.
  • the present invention relates to the engine idle speed management for this type of vehicles.
  • tractors are connected to a series of mechanical and hydraulic users which absorb power when activated. Whenever such users require a high power absorption, the combustion engine runs the risk of stalling because it cannot provide sufficient dynamic to compensate for the higher power demand.
  • NSH Noise Vibration Harshness
  • the present invention thus relates to a tractor, e.g., such as an agricultural tractor, an earthmoving machine, or an off-highway machine, e.g., for plowing, or material loading-unloading actions. Furthermore, the present invention relates to a compact tractor, typically of more compact size than the tractor.
  • tractor or compact tractor (not shown in the accompanying figures) are understood to be equipped with all the mechanical and electrical components typical of the above-mentioned types of tractors, which will therefore not be listed for simplicity and clarity of presentation, but which are understood to be included in the present discussion, since they are known to the person skilled in the art.
  • the tractor according to the present invention comprises a transmission fluid temperature sensor suitable for detecting the temperature of the transmission fluid of the tractor transmission group.
  • the tractor further comprises a cooling fluid temperature sensor adapted to detect the temperature of the cooling fluid of the engine of the tractor.
  • the tractor comprises a tractor speed sensor adapted to detect the linear movement speed of the tractor and a control unit operatively connected to at least the transmission fluid temperature sensor, the cooling fluid temperature sensor, and the tractor speed sensor.
  • the tractor control unit is also an object of the present invention.
  • Such a control unit comprises:
  • control unit comprises a processor operatively connected to aforesaid first, second, third, and fourth electrical connections and appropriate storage means.
  • said processor is configured to execute the steps of the method which will be described in the remainder of the present description, in particular at least steps d1) to e) which will be mentioned below or in any case all the steps which will be mentioned below and which are suitable for being executed on the processor.
  • select will refer to an operation of selecting and storing a value by the processor in a processor volatile memory or storage means, to be successively used to generate an appropriate signal to the engine speed management system.
  • the present invention thus also relates to a method for generating a command signal Ei for the idle speed value for a combustion engine of a tractor.
  • a command signal Ei is thus intended to determine the engine idle speed.
  • the aforesaid method comprises the steps of:
  • Figure 2 illustrates an exemplary chart of the function which binds a first engine idle speed value Eic1 relative to the transmission fluid temperature signal value Tc.
  • step d1) is executed on the processor, which firstly provides receiving the cooling fluid temperature signal Tc, and if the cooling fluid temperature signal Tc is lower than a cooling fluid temperature threshold Tcth, a first idle engine speed value Eic1 is selected as a function of the cooling fluid temperature signal Tc.
  • Figure 3 illustrates an exemplary chart of the function which binds a second engine idle speed value Eio1 relative to the transmission fluid temperature signal values To.
  • step d2) is executed on the processor, which provides receiving the transmission fluid temperature signal To, and successively if the transmission fluid temperature signal To is lower than a transmission fluid temperature threshold Toth, a second idle engine speed value Eio1 is selected as a function of the transmission fluid temperature signal To.
  • figure 5 illustrates an exemplary chart of the function which binds a third engine idle speed value EiV1 relative to the tractor speed signal values Vtr.
  • the method of the present invention provides executing step d3) on the processor, which firstly provides identifying whether the tractor speed signal Vtr is not zero, and, in the affirmative case, selecting a third engine idle speed value EiV1 as a function of the value of the tractor speed signal Vtr.
  • the method further comprises the step e), which provides calculating the desired idle speed value Eid as a function of the first Eid, the second Eio1, and the third idle speed value EiV1.
  • both the first engine idle speed value Eic1, the second engine idle speed value Eio1, and the third engine idle speed value EiV1 are all higher than a nominal idle engine speed Ein of the combustion engine.
  • a nominal idle engine speed Ein of the combustion engine Preferably, such an idle speed nominal value Ein is comprised between 700 and 850 rpm, generally 800.
  • the first engine idle speed value Eic1, the second engine idle speed value Eio1, the third engine idle speed value EiV1, are each at least equal to 900 or 1000 rpm.
  • Step f) of the method is executed on the control, unit, which provides generating a command signal Ei for the engine idle speed value as a function of the desired idle speed value Eid calculated on the processor in step e) .
  • the effect of raising the engine idle speed is achieved when a higher power demand of the engine is expected, such as when the cooling fluid or the transmission fluid is still cold (e.g., in the winter) and their increased viscosity, due to temperature, requires higher engine efforts.
  • the method allows to raise the engine idle speed in the starting phase, at low tractor forward speeds. This ensures that the engine responds promptly, only when required, and avoids engine stalling. In particular, this occurs in a synergistic and controlled manner depending on a plurality of parameters (cooling fluid temperature, transmission fluid, and tractor speed).
  • such a desired idle speed value Eid is calculated as the maximum value between the first Eic1, the second Eio1, and the third idle speed value EiV1.
  • the processing of the desired engine idle speed value Eid to obtain a command signal Ei of the engine idle speed value is, for example, an electrical or electro-mechanical or electro-hydraulic conversion or a level conversion, to adapt it to the reception by the engine.
  • Figure 1 shows a flow chart of an embodiment of the method, comprising the aforesaid steps of d1 and d2.
  • the method comprises checking whether the running engine is still warming up.
  • the method provides checking whether the cooling fluid temperature signal Tc is lower than the transmission fluid temperature signal To.
  • the method provides that the cooling fluid temperature threshold Tcth is equal to the detected value of the transmission fluid temperature signal To.
  • the first engine idle speed value Eic1 is constant for a determined range of cooling fluid temperature values Tc below the cooling fluid temperature threshold Tcth, while it assumes a value proportional to the value of the cooling fluid temperature signal Tc above the cooling fluid temperature threshold Tcth, e.g., shown in figure 2 .
  • the second idle engine speed value Eio1 is constant for a determined range of transmission fluid temperature values To below the transmission fluid temperature threshold Toth, while it assumes a value proportional to the value of the transmission fluid temperature signal To above the transmission fluid temperature threshold Toth, e.g., as shown in figure 3 .
  • the first Eic1, and the second idle speed value Eio1 are each equal to the nominal engine idle speed Ein.
  • Figure 4 shows a flow chart of an embodiment of the method, comprising the aforesaid step d3 of the method.
  • the method provides checking within a determined time interval ts (counter ⁇ ts) whether the status of the movement command activated by an operator for moving the tractor is in neutral, braked, or detached clutch status for at least a determined percentage threshold higher than 50% (i.e., clutch pedal pressed for a determined percentage threshold), e.g., for at least 90%. If the movement command status is in either neutral, braked, or clutch disengaged condition for at least a specified percentage threshold, the method provides generating the third engine idle speed value EiV1 equal to the nominal idle engine speed value Ein.
  • the method provides generating the third engine idle speed value EiV1 as a function of the tractor speed signal Vtr.
  • the third engine idle speed value EiV1 is constant for a determined range of tractor speed signal values Vtr below the tractor speed threshold Vth, while it assumes a value proportional to the value of the tractor speed signal Vtr above the tractor speed threshold Vth, e.g., shown in figure 5 .
  • the third idle speed value EiV1 is equal to the nominal idle engine speed Ein.
  • the checking of the movement command status allows the engine idle speed value to be varied only when necessary, i.e., when the tractor starts moving, while it allows the nominal idle speed to be maintained when the tractor is stationary in neutral or braked.
  • an embodiment of the method provides in particular: c1) receiving or calculating an angular position signal ⁇ of a steering wheel of the tractor and/or an angular velocity signal d ⁇ /dt of a steering wheel of the tractor; on the processor: d4) after receiving or calculating the angular velocity signal of the steering wheel d ⁇ /dt, if the angular velocity signal of the steering wheel is higher than a steering wheel angular velocity threshold value d ⁇ th, selecting a fourth idle speed value Ei ⁇ as a function of the tractor speed signal Vtr, said fourth idle speed value Ei ⁇ being higher than a nominal idle speed value Ein.
  • calculating the desired idle speed value Eid is as a function of the first Eid, the second Eio1, the third EiV1, and also the fourth idle speed value Ei ⁇ .
  • step d4 of the method is to be able to raise the idle engine speed as a function of the angular velocity of the steering wheel, i.e., how quickly the operator moves the steering wheel. This is useful because the higher the angular velocity of the steering wheel, the greater the demand for fluid flow from the hydraulic steering wheel system on the tractor. Again in this case, a greater hydraulic fluid flow for hydraulic steering requires more dynamic effort from the engine in a short time interval.
  • the angular velocity signal d ⁇ /dt is calculated on the processor by deriving the angular position signal.
  • the tractor further comprises an electronic command which allows to double the displacement of the hydraulic steering system, i.e., allows to double the steering angle, the number of steering wheel turns being the same. This results in a doubling of the hydraulic fluid movement of the steering system.
  • the method provides that if the electronic command which allows to double the displacement of the hydraulic steering wheel system is active, the fourth engine idle speed value Ei ⁇ is always constant and higher than the nominal idle engine speed value Ein, regardless of the angular steering wheel speed value d ⁇ /dt.
  • the method further comprises the steps of: c2) detecting a command signal for hydraulic distributor activation DcomON, which is related to the activation of a distributor command that is made by an operator of the tractor; on the processor: d5) selecting a predetermined fifth idle speed value Eihd, said fifth idle speed value Eihd being higher than a nominal idle speed value Ein.
  • calculating the desired idle speed value Eid is as a function of the first Eid, the second Eio1, the third EiV1, and the fifth idle speed value Eihd.
  • the method provides waiting for a predetermined time interval ⁇ t1 before sending a signal for supplying the flow of hydraulic fluid Df to the hydraulic distributor.
  • Step d5) of the method and the waiting for a predetermined time ⁇ t1 are particularly effective in the case of activation of tractor hydraulic distributors (users) of the on-off type.
  • the effect is obtained of increasing the idle engine speed in a predictive manner, i.e., in advance of the command to activate the hydraulic fluid flow to operate the hydraulic distributor.
  • the effect is to compensate in advance for a request for more power and dynamics to the engine, only at the time of need, avoiding a potential engine stalling.
  • the method comprises the steps of: c3) detecting a command signal for power takeoff activation PTOcomm, which is related to the activation of a command for the power takeoff that is made by an operator of the tractor; on the processor: d6) after step c3), selecting a sixth idle speed Eipto, said sixth idle speed value Eipto being higher than a nominal idle speed value Ein.
  • calculating the desired idle speed value Eid is as a function of the first Eid, the second Eio1, the third EiV1, and the sixth idle speed value Eipto.
  • the method involves waiting for a third predetermined time interval ⁇ t3 before sending a signal for coupling the clutch of the power takeoff (Clutch_on).
  • Power take-off preferably means the typical power take-off generally located at the rear of the tractor with a power take-off shaft connected to the drive shaft by an on-off or proportional clutch.
  • step d6) of the method and the waiting for a third interval of time ⁇ t3 are particularly effective in the case of activation of tractor power takeoffs of the on-off type.
  • the effect is to increase the engine idle speed in a predictive manner, i.e., in advance of the clutch activation command for coupling the power takeoff to the drive shaft.
  • the effect is to compensate in advance for a request for more power and dynamics to the engine, only at the time of need, avoiding a potential engine stalling.
  • step e) calculating the desired idle speed value Eid is as a function of the first Eic1, the second Eio1, the third EiV1, and the seventh idle speed value.
  • the effect obtained in this case is a preventive increase in engine speed in a preferably constant manner, in the case of operation of the cabin air conditioning system, in particular the air conditioning compressor.
  • calculating the desired idle speed value Eid is dependent on the first Eic1, the second Eio1, the third EiV1, the fourth Ei ⁇ , the fifth Eihd, and the sixth idle speed value Eipto. For example, it is preferably the maximum between the first Eic1, the second Eio1, the third EiV1, the fourth Ei ⁇ , the fifth Eihd, and the sixth idle engine speed value Eipto.
  • the method provides that, in step e), the calculation of the desired engine idle speed value Eid is as a function of the first Eid, the second Eio1, the third EiV1, the fourth Ei ⁇ , the fifth Eihd, and the sixth Eipto and the seventh engine idle speed value. For example, it is preferably the maximum among them.
  • the method further comprises the step of sending a transmission group command signal St to a tractor electronic transmission group control unit to vary the transmission ratio of the transmission group so that the speed of the tractor is maintained unchanged as a result of the change in engine speed determined by the command signal (Ei) of the engine idle speed value.
  • the tractor should preferably include a continuously variable transmission (CVT) group.
  • CVT continuously variable transmission
  • the transmission group command signal can operate continuously on the transmission ratio as a function of the command signal (Ei) of the set engine idle speed value. This avoids inadvertent sharp acceleration of the tractor when the clutch is engaged.
  • FIG 1a An example embodiment of the method according to the embodiment comprising sending the control signal transmission group is shown in figure 1a , as a variant of the method described in figure 1 .
  • FIG 4a A further example of the method according to the embodiment comprising sending the control signal transmission group is shown in figure 4a , as a variant of the method in figure 4 .
  • the method comprises generating and sending a transmission unit command signal Str to an electronic control unit of the tractor transmission group, to vary the transmission ratio of the transmission group to maintain the speed of the tractor unchanged following the variation of the desired engine idle speed value Eid, and thus the engine speed determined by the command signal Ei.
  • the transmission command signal Str will be configured to generate a reduction in the transmission ratio of the tractor transmission.
  • the transmission group command signal Str will be configured to generate an increase in the transmission ratio of the tractor transmission group.
  • the words generate or calculate or the like mean the generation or calculation executed on an electronic medium, e.g., by means of an electronic processing unit, such as a processor.
  • a processor is the processor of the control unit on the tractor.
  • the tractor electronic control unit preferably either comprises or coincides with the transmission group electronic control unit. If the electronic control unit of the tractor is separate from the electronic control unit of the transmission group, said control units are operationally linked to exchange signals with each other. It is further apparent that the transmission group control unit is operationally connected to the transmission group to determine the variation of the mechanical transmission ratio.
  • the method of generating a command signal of the idle speed value for a combustion engine of a tractor, the respective control unit, and the tractor comprising such a control unit, a tractor, or a compact tractor allows to achieve the set objectives, i.e., to increase the engine idle speed to prevent it from shutting down and to increase performance, but only in case of actual need to prevent unwanted consumption.
  • the present invention allows to obtain an excellent compromise between minimizing consumption and ensuring performance.
  • the engine idle speed management obtained by virtue of the method according to the present invention allows to improve the comfort perceived in the passenger compartment by the operator, in terms of NVH.
  • the present method allows the same hydraulic actuators and power takeoffs to be used without any technical modifications.
  • the method according to the present invention allows to compensate the occasions of request for an increase in performance in a predictive manner, without having to redesign the users, reducing their performances.
  • the method according to the present invention allows to use all the sensors already present as standard on tractors, with no need to modify any electronic control unit or to add particular torque or engine power detection sensors.

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)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (12)

  1. Procédé pour générer un signal de commande (Ei) pour la valeur de vitesse de ralenti d'un moteur à combustion d'un tracteur, ledit procédé comprenant les étapes suivantes :
    a) la fourniture d'une unité de commande comprenant un processeur ;
    b) la réception d'un signal de température de fluide de transmission (To) qui est lié à la température du fluide de transmission du groupe de transmission du tracteur, et la réception d'un signal de température de fluide de refroidissement (Tc) qui est lié à la température du fluide de refroidissement du moteur du tracteur ;
    c) la réception d'un signal de vitesse de tracteur (Vtr) sur l'unité de commande, ledit signal de vitesse de tracteur (Vtr) se rapportant à la vitesse de déplacement linéaire du tracteur ;
    sur le processeur :
    d1) après réception du signal de température de fluide de transmission (Tc), si le signal de température de fluide de refroidissement (Tc) est inférieur à un seuil de température de fluide de refroidissement (Tcth), la sélection d'une première valeur de vitesse de ralenti (Eic1) en tant que fonction du signal de température de fluide de refroidissement (Tc), ladite première valeur de vitesse de ralenti (Eic1) étant supérieure à une valeur de vitesse de ralenti nominale (Ein) du moteur à combustion ;
    d2) après réception du signal de température de fluide de transmission (To), si le signal de température de fluide de transmission (To) est inférieur à un seuil de température de fluide de transmission (Toth), la sélection d'une deuxième valeur de vitesse de ralenti (Eio1) en tant que fonction du signal de température de fluide de transmission (To), ladite deuxième valeur de vitesse de ralenti (Eio1) étant supérieure à la valeur de vitesse de ralenti nominale (Ein) ;
    d3) si le signal de vitesse de tracteur (Vtr) n'est pas égal à zéro, la sélection d'une troisième valeur de vitesse de ralenti (EiV1) en tant que fonction de la valeur du signal de vitesse de tracteur (Vtr), ladite troisième valeur de vitesse de ralenti (Eic1) étant supérieure à la valeur de vitesse de ralenti nominale (Ein) du moteur à combustion ;
    e) le calcul de la valeur de vitesse de ralenti souhaitée (Eid) en tant que valeur maximale parmi la première (Eic1), la deuxième (Eio1) et la troisième valeur de vitesse de ralenti (EiV1) ;
    sur ladite unité de commande :
    f) la génération d'un signal de commande (Ei) pour la valeur de vitesse de ralenti du moteur en tant que fonction de la valeur de vitesse de ralenti souhaitée (Eid) calculée sur le processeur lors de l'étape e).
  2. Procédé selon la revendication 1, comprenant en outre les étapes suivantes :
    c1) la réception ou le calcul d'un signal de position angulaire (θ) d'un volant de direction du tracteur et/ou d'un signal de vitesse angulaire (dθ/dt) d'un volant de direction du tracteur ;
    sur le processeur :
    d4) après réception ou calcul du signal de vitesse angulaire du volant de direction (dθ/dt), si le signal de vitesse angulaire du volant de direction est supérieur à une valeur seuil de vitesse angulaire de volant de direction (dθth), la sélection d'une quatrième valeur de vitesse de ralenti (Eiθ) en tant que fonction du signal de vitesse de tracteur (Vtr), ladite quatrième valeur de vitesse de ralenti (Eiθ) étant supérieure à une valeur de vitesse de ralenti nominale (Ein) ;
    où, lors de l'étape e), le calcul de la valeur de vitesse de ralenti souhaitée (Eid) est une fonction de la première, de la deuxième, de la troisième et de la quatrième valeur de vitesse de ralenti.
  3. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre les étapes suivantes :
    c2) la détection d'un signal de commande pour une activation de distributeur hydraulique (DcomON), qui est lié à l'activation d'une commande de distributeur qui est effectuée par un opérateur du tracteur ;
    sur le processeur :
    d5) la sélection d'une cinquième valeur de vitesse de ralenti (Eihd) prédéterminée, ladite cinquième valeur de vitesse de ralenti (Eihd) étant supérieure à une valeur de vitesse de ralenti nominale (Ein) ;
    et où, lors de l'étape e), le calcul de la valeur de vitesse de ralenti souhaitée (Eid) est une fonction de la première (Eic1), de la deuxième (Eio1), de la troisième (EiV1) et de la cinquième valeur de vitesse de ralenti (Eihd).
  4. Procédé selon la revendication 3, dans lequel, après l'étape f), le procédé implique l'attente pendant un intervalle de temps prédéterminé (Δt1) avant l'envoi d'un signal permettant d'amener le flux de fluide hydraulique (Df) au distributeur hydraulique.
  5. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre les étapes suivantes :
    c3) la détection d'un signal de commande pour une activation de prise de force (PTOcomm), qui est lié à l'activation d'une commande de la prise de force qui est effectuée par un opérateur du tracteur ;
    sur le processeur :
    d6) après l'étape c3), la sélection d'une sixième valeur de vitesse de ralenti (Eipto), ladite sixième valeur de vitesse de ralenti (Eipto) étant supérieure à une valeur de vitesse de ralenti nominale (Ein) ;
    et où, lors de l'étape e), le calcul de la valeur de vitesse de ralenti souhaitée (Eid) est une fonction de la première (Eic1), de la deuxième (Eio1), de la troisième (EiV1) et de la sixième valeur de vitesse de ralenti (Eipto).
  6. Procédé selon la revendication 5, dans lequel, après l'étape f), le procédé implique l'attente pendant un troisième intervalle de temps prédéterminé (Δt3) avant l'envoi d'un signal permettant de coupler l'embrayage de la prise de force (Clutch on).
  7. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre les étapes suivantes :
    c4) la détection d'un signal de commande pour une activation de compresseur d'un système de climatisation de cabine, lequel signal est lié au démarrage du compresseur du système de climatisation de la cabine du tracteur ;
    sur le processeur :
    d7) après l'étape c3), la sélection d'une septième valeur de vitesse de ralenti prédéterminée, ladite septième valeur de vitesse de ralenti étant supérieure à une valeur de vitesse de ralenti nominale (Ein) ;
    et où, lors de l'étape e), le calcul de la valeur de vitesse de ralenti souhaitée (Eid) est une fonction de la première (Eic1), de la deuxième (Eio1), de la troisième (EiV1) et de la septième valeur de vitesse de ralenti.
  8. Procédé selon l'une quelconque des revendications 1 à 2, 3, 5, dans lequel, lors de l'étape e), le calcul de la valeur de vitesse de ralenti souhaitée (Eid) dépend de la première (Eic1), de la deuxième (Eio1), de la troisième (EiV1) de la quatrième (Eiθ), de la cinquième (Eihd) et de la sixième valeur de vitesse de ralenti (Eipto).
  9. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre l'étape suivante :
    l'envoi d'un signal de commande de groupe de transmission à une unité de commande électronique du groupe de transmission du tracteur, ledit signal de commande étant configuré pour faire varier le rapport de transmission du groupe de transmission de façon à ce que la vitesse du tracteur ne varie pas après la variation de la vitesse de ralenti du moteur déterminée par le signal de commande (Ei) de la vitesse de ralenti du moteur.
  10. Unité de commande pour tracteur, comprenant
    - une première connexion électrique appropriée pour recevoir un signal de température de fluide de transmission (To) qui est lié à la température du fluide de transmission du groupe de transmission du tracteur ;
    - une deuxième connexion électrique appropriée pour recevoir un signal de température de fluide de refroidissement (Tc) qui est lié à la température du fluide de refroidissement du moteur du tracteur ;
    - une troisième connexion électrique appropriée pour recevoir un signal de vitesse de tracteur (Vtr) sur l'unité de commande, ledit signal de vitesse de tracteur (Vtr) se rapportant à la vitesse de déplacement linéaire du tracteur ;
    - une quatrième connexion électrique appropriée pour envoyer un signal de commande (Ei) pour la valeur de vitesse de ralenti du moteur ;
    - un processeur connecté de manière fonctionnelle auxdites première, deuxième, troisième et quatrième connexions électriques et à des moyens de stockage ;
    ledit processeur étant configuré pour exécuter les étapes b), c), d1), d2), d3), e) et f) du procédé selon la revendication 1.
  11. Tracteur comprenant :
    - un capteur de température de fluide de transmission approprié pour détecter la température du fluide de transmission (To) du groupe de transmission du tracteur ;
    - un capteur de température de fluide de refroidissement approprié pour détecter la température du fluide de refroidissement (Tc) du moteur du tracteur ;
    - un capteur de vitesse de tracteur approprié pour détecter la vitesse de déplacement linéaire (Vtr) du tracteur ;
    - une unité de commande selon la revendication 10, qui est reliée de manière fonctionnelle au capteur de température de fluide de transmission, au capteur de température de fluide de refroidissement et au capteur de vitesse de tracteur.
  12. Programme mis en oeuvre par ordinateur, comprenant des instructions de codage appropriées pour mettre en oeuvre les étapes b), c), d1), d2), d3), e) et f) de la revendication 1 lorsque ledit programme est exécuté sur l'unité de commande selon la revendication 10.
EP21727228.5A 2020-05-19 2021-05-03 Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur Active EP4153854B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000011605A IT202000011605A1 (it) 2020-05-19 2020-05-19 Metodo di generazione di un segnale di comando del valore di numero di giri minimo per un motore termico, centralina di controllo e trattore
PCT/IB2021/053672 WO2021234485A1 (fr) 2020-05-19 2021-05-03 Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur

Publications (2)

Publication Number Publication Date
EP4153854A1 EP4153854A1 (fr) 2023-03-29
EP4153854B1 true EP4153854B1 (fr) 2024-05-01

Family

ID=71994896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21727228.5A Active EP4153854B1 (fr) 2020-05-19 2021-05-03 Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur

Country Status (3)

Country Link
EP (1) EP4153854B1 (fr)
IT (1) IT202000011605A1 (fr)
WO (1) WO2021234485A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114592978B (zh) * 2022-03-16 2023-04-18 潍柴动力股份有限公司 一种车辆怠速控制方法及装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4648040A (en) * 1984-02-21 1987-03-03 J. I. Case Company Engine monitor/control microprocessor for continuously variable power train
JPS6231532A (ja) * 1985-08-02 1987-02-10 Toyota Motor Corp 車両用磁粉式電磁クラツチの制御装置
DE10302061B4 (de) * 2003-01-21 2016-03-24 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine, insbesondere in einem Kraftfahrzeug, sowie Computerprogramm, Speichermedium, Steuer- und/oder Regelgerät, sowie Brennkraftmaschine
ITMO20110304A1 (it) * 2011-11-28 2013-05-29 Cnh Italia Spa Engine control device for a work vehicle.
US20140083392A1 (en) * 2012-09-27 2014-03-27 International Engine Intellectual Property Company, Llc Methods for controlling engine idle speed

Also Published As

Publication number Publication date
WO2021234485A1 (fr) 2021-11-25
IT202000011605A1 (it) 2021-11-19
EP4153854A1 (fr) 2023-03-29

Similar Documents

Publication Publication Date Title
US8215429B2 (en) Generator power-based cold start strategy
US5088041A (en) Regenerative braking system for car
US8886421B2 (en) System and method for protecting drive shaft
US7566103B2 (en) Method for controlling a drive system and/or a wheel brake system
US20080184703A1 (en) Method for regulating a hydrostatic drive system
JP3704934B2 (ja) 流体継ぎ手の締結力制御装置
EP4153854B1 (fr) Procédé pour générer un signal de commande de la valeur de vitesse de ralenti d'un moteur à combustion, unité de commande et tracteur
EP1283341B1 (fr) Dispositif de régulation de la vitesse d'un véhicule
CN109027219B (zh) 车辆控制装置
US7698050B2 (en) Method and device for controlling a drive unit
US11173916B2 (en) Vehicle control apparatus
WO2003037672A1 (fr) Boite a vitesses pour vehicules automobiles
EP3933121A1 (fr) Système de commande d'un système de propulsion d'un véhicule de travail ou agricole
CN111942170A (zh) 车辆蠕行控制装置以及车辆蠕行控制方法
RU2754285C2 (ru) Система автоматического пуска-останова
US8676474B2 (en) Machine control system and method
JPH11500685A (ja) 制御システム
JP2003048461A (ja) 車両統合制御システム及び記録媒体
JP7040344B2 (ja) 車両制御装置
JP5870710B2 (ja) 電動パワーステアリングシステムを備えた車両、及びその油圧供給方法
US6205394B1 (en) Automatic engine power control system for motor vehicles having a power control element
JP2005030484A (ja) 自動変速機の制御装置
JP3052218B2 (ja) 車両用自動変速機のクリープ制御装置
MXPA02011827A (es) Control de velocidad de motor diesel para evitar marcha reducida.
JP6318950B2 (ja) 車両の制御装置

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20221110

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

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

Effective date: 20230526

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
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

INTG Intention to grant announced

Effective date: 20240124

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

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: 602021012755

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D