WO2018127634A1 - Operation of an electrical machine of a hybrid electric vehicle prior to closing a jaw clutch - Google Patents

Operation of an electrical machine of a hybrid electric vehicle prior to closing a jaw clutch Download PDF

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Publication number
WO2018127634A1
WO2018127634A1 PCT/FR2017/053440 FR2017053440W WO2018127634A1 WO 2018127634 A1 WO2018127634 A1 WO 2018127634A1 FR 2017053440 W FR2017053440 W FR 2017053440W WO 2018127634 A1 WO2018127634 A1 WO 2018127634A1
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WO
WIPO (PCT)
Prior art keywords
speed
electric machine
coupling
clutch
difference
Prior art date
Application number
PCT/FR2017/053440
Other languages
French (fr)
Inventor
Gregor SERDJANIAN
Arnaud BARDET
Original Assignee
Psa Automobiles Sa
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 Psa Automobiles Sa filed Critical Psa Automobiles Sa
Priority to EP17822383.0A priority Critical patent/EP3565728A1/en
Priority to CN201780082723.2A priority patent/CN110167777A/en
Publication of WO2018127634A1 publication Critical patent/WO2018127634A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
    • B60W2050/0292—Fail-safe or redundant systems, e.g. limp-home or backup systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/029—Adapting to failures or work around with other constraints, e.g. circumvention by avoiding use of failed parts
    • B60W2050/0295—Inhibiting action of specific actuators or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/081—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • B60W2710/081—Speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D11/00—Clutches in which the members have interengaging parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10443—Clutch type
    • F16D2500/10462—Dog-type clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/51—Relating safety
    • F16D2500/5114—Failsafe

Definitions

  • the present invention relates to a control strategy of an electric machine connected by a clutch coupling system to the wheels of a hybrid motor vehicle, and a hybrid vehicle comprising means implementing such a strategy.
  • a known type of hybrid vehicle presented in particular by the document FR-B1 -2954441, comprises a heat engine driving by a gearbox the front wheels of the vehicle, and an electric machine driving the rear wheels by a transmission comprising a device. dog coupling controlled by an automatic actuator.
  • the electric machine powered by traction batteries can operate as a motor by drawing energy on these batteries to deliver a torque on the rear wheels, or generator by recovering energy recharging these batteries.
  • the clutch coupling of the electric machine may comprise on each side of this coupling, towards the electric machine and towards the wheels of the vehicle, transmissions that increase the speed to adapt the speeds of rotation.
  • the clutch coupling can be connected directly to the shaft of the electric machine, rotating at the same speed as this machine, with a speed reduction downstream resulting in a differential distributing the speed to the rear wheels.
  • the coupling can be installed in the differential, rotating at the same speed as the rear wheels.
  • the clutch coupling does not have progressivity when it is closed, unlike a friction clutch, it is necessary to close it by providing a fairly precise regulation of the electric machine with a small margin so as to sufficiently synchronize the clutch. the rotational speeds of the two elements of this coupling to be connected before engaging their teeth to each other, to avoid noise, wear, and a risk of refusal of commitment.
  • the document of the prior art mentioned above shows a method of coupling the electric machine, this machine receiving a rotation speed setpoint so as to synchronize the two elements of the dog clutch, taking into account the gear ratios. of the transmission chain.
  • this method can cause problems in case of failure of the control system, if we apply a control of the electric machine with a high torque while the clutch coupling is closed by mistake. A torque peak is obtained on the wheels driven by this electric machine, accelerating or braking the vehicle, which can be dangerous for the driver and his entourage by destabilizing this vehicle.
  • this problem arises for an electric machine of a hybrid vehicle driving the front or rear wheels via a clutch coupling, this machine being connected to the wheels independently of the heat engine transmission, or through this transmission.
  • the present invention is intended in particular to avoid these problems of the prior art.
  • An advantage of this strategy is that to prepare a closure in the case where the clutch coupling is already closed, then the speed difference of the elements of the coupling is below the speed threshold. If in addition the speed setpoint is moved away from the current speed beyond the speed threshold, then the strategy prevents the speed regulation of the electric machine requiring a high torque to make up for this difference, which would constitute a mistake presenting a discomfort or even a danger to the passengers and the entourage.
  • the strategy does not prevent the speed control of the electric machine.
  • this difference in speed is too low to require the electric machine a high torque catch-up of the difference, the low torque requested would not be uncomfortable or dangerous.
  • control strategy of an electric machine according to the invention may further include one or more of the following features, which may be combined with one another.
  • the strategy puts the electric machine in a state ensuring the safety comprising a cut-off of the control of the electric machine, or a control of this electric machine to deliver on the system Coupling clutch torque zero.
  • the strategy allows the regulation of the electric machine in the speed mode if the speed difference of the two elements of the clutch coupling is greater than the speed threshold, or if the difference between the speed reference and the current speed. is below the diet threshold.
  • the speed threshold of the speed difference of the two elements of the coupling corresponds by taking into account the reduction of a transmission connecting the electrical machine to this coupling, at a maximum speed of this electric machine.
  • the speed threshold of the difference between the speed reference of the electric machine and its current speed is at most 300trs / min.
  • the invention also relates to a hybrid motor vehicle equipped with an electric machine driving wheels by a clutch coupling, which comprises means implementing a control strategy of this electric machine comprising any one of the preceding features.
  • the electric machine can drive the wheels disposed at the rear of the vehicle.
  • FIG. 1 is a diagram showing the equipment of a hybrid vehicle implementing a control strategy according to the invention.
  • FIG. 2 is a decision graph showing the operation of the control strategy.
  • Figure 1 shows an electric vehicle traction machine 2 having a rotational speed, connected by a first transmission 4 to a dog clutch 6, comprising an upstream element connected to a downstream element when it is closed.
  • the clutch coupling 6 is connected by a second transmission 8 to the wheels 10 of an axle of the vehicle.
  • the first transmission 4 may include gear reduction, the first element of the coupling 6 rotating at a speed below this speed, or comprise a direct engagement with the shaft of the electric machine 2, the first element of the coupling then rotating at a speed which is the speed of this machine.
  • the second transmission 8 can in the same way include a gear reduction, or a direct engagement with the wheels 10, for example in the case where the clutch coupling 6 is attached to the differential driving the rear wheels of the vehicle.
  • the supervisor 12 then establishes requests sent to the electrical machine 2, including a speed setpoint 18, a torque setpoint 20, and a type of regulation which is required of it.
  • the electric machine 2 then responds to these requests by generating a request. torque according to the instructions torque 20, to achieve a regime according to the regimen 18, applying the type of regulation requested.
  • the torque setpoint 20 in preparation for closing the clutch coupling 6, the torque setpoint 20 enables the electric machine 2 to reach the speed setpoint 18 which it is requested as quickly as possible, in order to obtain the desired speed.
  • intermediate of the first transmission 4 substantially the synchronization speed of the elements of this coupling, with an acceptable margin for a commitment without risk.
  • FIG. 2 shows, in the case of a request for closing the clutch 30, a first selection 32 which calculates whether the speed difference of the two elements of the clutch coupling 6 is less than a speed threshold SV.
  • a second selection 34 calculates whether the difference between the speed reference 18 and the current speed 16 of the electric machine 2 is greater than a speed threshold SR.
  • At least one selection 32, 34 is negative, then there is an authorization 38 for regulating the electric machine 2, which can receive a torque setpoint equal to its maximum torque.
  • the speed threshold SV of the coupling 6 and the speed threshold SR correspond to 300trs / min maximum of the electric machine 2. This maximum value can be reached with the coupling 6 closed given the information phase shifts, and games as well as the elasticity of the driveline.
  • the electrical machine 2 can be put in a safe state 40 in order to ensure the safety of the vehicle, including in particular a cut of its control, or its control to deliver on the dog clutch coupling system. 6 a zero torque that accompanies the rotational speed changes of this coupling without applying effort on it.
  • control strategy according to the invention increasing the general safety of the vehicle, is simple and economical to implement, requiring only adaptations of the control programs of the hybrid power train, without modification of components.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a strategy for operating an electrical machine (2) connected by a jaw clutch system (6) to the wheels (10) of a hybrid electric vehicle which implements a speed control method for controlling the electrical machine (2) with a synchronising speed set point value (18) in order to adjust with a margin the speeds of the two elements of the clutch (6) to be interconnected, in preparation for closing the clutch, this strategy being distinguished in that it prevents the control of the speed of the electrical machine (2) in preparation for closing the jaw clutch (6) from being implemented if the speed difference between the two elements of the clutch (6) is lower than a speed threshold and if, for this electrical machine (2), the difference between the speed set point value (18) and the actual speed (16) is higher than a speed threshold.

Description

CONTROLE D'UNE MACHINE ELECTRIQUE DE VEHICULE HYBRIDE POUR LA FERMETURE D'UN ACCOUPLEMENT A CRABOT  CHECKING A HYBRID VEHICLE ELECTRIC MACHINE TO CLOSE A CRAB COUPLING
La présente invention concerne une stratégie de contrôle d'une machine électrique reliée par un système d'accouplement à crabot à des roues d'un véhicule automobile hybride, ainsi qu'un véhicule hybride comportant des moyens mettant en œuvre une telle stratégie. The present invention relates to a control strategy of an electric machine connected by a clutch coupling system to the wheels of a hybrid motor vehicle, and a hybrid vehicle comprising means implementing such a strategy.
Un type de véhicule hybride connu, présenté notamment par le document FR-B1 -2954441 , comporte un moteur thermique entraînant par une boîte de vitesses les roues avant du véhicule, et une machine électrique entraînant les roues arrière par une transmission comprenant un dispositif d'accouplement à crabot commandé par un actionneur automatique.  A known type of hybrid vehicle, presented in particular by the document FR-B1 -2954441, comprises a heat engine driving by a gearbox the front wheels of the vehicle, and an electric machine driving the rear wheels by a transmission comprising a device. dog coupling controlled by an automatic actuator.
La machine électrique alimentée par des batteries de traction, peut fonctionner en moteur en prélevant une énergie sur ces batteries pour délivrer un couple sur les roues arrière, ou en génératrice en récupérant une énergie rechargeant ces batteries.  The electric machine powered by traction batteries, can operate as a motor by drawing energy on these batteries to deliver a torque on the rear wheels, or generator by recovering energy recharging these batteries.
On obtient en accouplant la machine électrique aux roues arrière, un roulage en mode hybride comprenant une traction par le moteur thermique et par la machine électrique, ou un roulage en mode uniquement électrique en laissant la boîte de vitesses du moteur thermique au point mort.  It is obtained by coupling the electric machine to the rear wheels, a hybrid mode of rolling comprising a traction by the engine and the electric machine, or driving in electric only mode leaving the gearbox of the engine in neutral.
Avec un désaccouplement de la machine électrique on réalise un roulage avec le moteur thermique sans entraîner cette machine, ce qui élimine les pertes venant de sa résistance à la rotation.  With uncoupling of the electric machine, the motor is rolled without driving the machine, which eliminates the losses due to its resistance to rotation.
D'une manière générale, l'accouplement à crabot de la machine électrique peut comporter de chaque côté de cet accouplement, vers la machine électrique et vers les roues du véhicule, des transmissions démultipliant la vitesse pour adapter les vitesses de rotation.  In general, the clutch coupling of the electric machine may comprise on each side of this coupling, towards the electric machine and towards the wheels of the vehicle, transmissions that increase the speed to adapt the speeds of rotation.
En particulier l'accouplement à crabot peut être relié directement à l'arbre de la machine électrique, en tournant au même régime que cette machine, avec une réduction de vitesse en aval entraînant un différentiel répartissant la vitesse vers les roues arrière. En variante l'accouplement peut être installé dans le différentiel, en tournant à la même vitesse que les roues arrière. In particular the clutch coupling can be connected directly to the shaft of the electric machine, rotating at the same speed as this machine, with a speed reduction downstream resulting in a differential distributing the speed to the rear wheels. Alternatively the coupling can be installed in the differential, rotating at the same speed as the rear wheels.
L'accouplement à crabot ne présentant pas de progressivité lors de sa fermeture, contrairement à un embrayage par friction, il est nécessaire pour le fermer de prévoir une régulation en régime de la machine électrique assez précise avec une marge réduite, de manière à synchroniser suffisamment les vitesses de rotation des deux éléments de cet accouplement à relier avant d'engager leurs dentures entre elles, pour éviter des bruits, une usure, et un risque de refus d'engagement.  As the clutch coupling does not have progressivity when it is closed, unlike a friction clutch, it is necessary to close it by providing a fairly precise regulation of the electric machine with a small margin so as to sufficiently synchronize the clutch. the rotational speeds of the two elements of this coupling to be connected before engaging their teeth to each other, to avoid noise, wear, and a risk of refusal of commitment.
Le document de l'art antérieur cité ci-dessus présente un procédé d'accouplement de la machine électrique, cette machine recevant une consigne de régime de rotation de façon à synchroniser les deux éléments de l'accouplement à crabot, en tenant compte des démultiplications de la chaîne de transmission.  The document of the prior art mentioned above shows a method of coupling the electric machine, this machine receiving a rotation speed setpoint so as to synchronize the two elements of the dog clutch, taking into account the gear ratios. of the transmission chain.
En particulier pour réduire rapidement un écart de vitesse assez important des éléments de l'accouplement, on applique un pilotage de la machine électrique demandant son couple maximum, qui peut être positif ou négatif, pour atteindre rapidement le régime de consigne.  In particular to quickly reduce a fairly large deviation of the elements of the coupling, it applies a control of the electric machine requesting its maximum torque, which can be positive or negative, to quickly reach the set speed.
Toutefois ce procédé peut poser des problèmes en cas de défaillance du système de contrôle, si on applique un pilotage de la machine électrique avec un couple élevé alors que l'accouplement à crabot est fermé par erreur. On obtient une pointe de couple sur les roues entraînées par cette machine électrique, accélérant ou freinant le véhicule, qui peut être dangereux pour le conducteur et son entourage en déstabilisant ce véhicule.  However, this method can cause problems in case of failure of the control system, if we apply a control of the electric machine with a high torque while the clutch coupling is closed by mistake. A torque peak is obtained on the wheels driven by this electric machine, accelerating or braking the vehicle, which can be dangerous for the driver and his entourage by destabilizing this vehicle.
D'une manière générale ce problème se pose pour une machine électrique d'un véhicule hybride entraînant les roues avant ou arrière par l'intermédiaire d'un accouplement à crabot, cette machine étant reliée aux roues indépendamment de la transmission du moteur thermique, ou par l'intermédiaire de cette transmission. La présente invention a notamment pour but d'éviter ces problèmes de l'art antérieur. In general terms, this problem arises for an electric machine of a hybrid vehicle driving the front or rear wheels via a clutch coupling, this machine being connected to the wheels independently of the heat engine transmission, or through this transmission. The present invention is intended in particular to avoid these problems of the prior art.
Elle propose à cet effet une stratégie de contrôle d'une machine électrique reliée par un système d'accouplement à crabot à des roues d'un véhicule automobile hybride, ce véhicule mettant en œuvre une régulation en régime de la machine électrique comportant une consigne de régime de synchronisation qui ajuste avec une marge les vitesses des deux éléments à relier de l'accouplement afin de préparer sa fermeture, cette stratégie étant remarquable en ce qu'elle émet une interdiction de la régulation en régime de la machine électrique préparant la fermeture de l'accouplement à crabot, si l'écart de vitesse des deux éléments de cet accouplement est inférieur à un seuil de vitesse, et si pour cette machine électrique l'écart entre la consigne de régime et son régime en cours est supérieur à un seuil de régime.  It proposes for this purpose a control strategy of an electric machine connected by a clutch coupling system to the wheels of a hybrid motor vehicle, the vehicle implementing a regulation of the electric machine with a set of synchronization regime which adjusts with a margin the speeds of the two elements to be connected to the coupling in order to prepare for closing, this strategy being remarkable in that it issues a prohibition of the regulation of the electric machine preparing the closing of the clutch coupling, if the speed difference of the two elements of this coupling is less than a speed threshold, and if for this electrical machine the difference between the speed reference and its current speed is greater than a threshold of diet.
Un avantage de cette stratégie est que pour préparer une fermeture dans le cas où l'accouplement à crabot est déjà fermé, alors l'écart de vitesse des éléments de l'accouplement est inférieur au seuil de vitesse. Si de plus la consigne de régime est éloignée du régime en cours au-delà du seuil de régime, alors la stratégie empêche la régulation en régime de la machine électrique demandant un fort couple pour rattraper cette différence, ce qui constituerait une erreur présentant un inconfort ou même un danger pour les passagers et l'entourage.  An advantage of this strategy is that to prepare a closure in the case where the clutch coupling is already closed, then the speed difference of the elements of the coupling is below the speed threshold. If in addition the speed setpoint is moved away from the current speed beyond the speed threshold, then the strategy prevents the speed regulation of the electric machine requiring a high torque to make up for this difference, which would constitute a mistake presenting a discomfort or even a danger to the passengers and the entourage.
Si par contre la consigne de régime est proche du régime en cours, en- dessous du seuil de régime, alors la stratégie n'empêche pas la régulation en régime de la machine électrique. Dans le cas d'une défaillance avec un accouplement fermé, cet écart de régime est trop faible pour demander à la machine électrique un fort couple de rattrapage de la différence, le faible couple demandé ne serait pas inconfortable ni dangereux.  If, on the other hand, the speed set point is close to the current speed, below the speed threshold, then the strategy does not prevent the speed control of the electric machine. In the case of a failure with a closed coupling, this difference in speed is too low to require the electric machine a high torque catch-up of the difference, the low torque requested would not be uncomfortable or dangerous.
Par contre dans le cas d'une absence de défaillance, pour des changements rapides comprenant par exemple une fermeture du crabot juste après son ouverture, l'écart de vitesse est encore inférieur au seuil de vitesse, mais la consigne de régime est proche du régime en cours, en dessous du seuil de régime. On n'est alors pas obligé d'attendre un dépassement du seuil de vitesse pour mettre en œuvre le procédé de régulation en régime de la machine électrique, qui peut commencer de suite. By cons in the case of no failure, for rapid changes including for example a closing of the clutch just after opening, the speed difference is still below the threshold of speed, but the speed reference is close to the current speed, below the speed limit. It is then not necessary to wait for the speed threshold to be exceeded in order to implement the regulation method of the electric machine, which can begin immediately.
La stratégie de contrôle d'une machine électrique selon l'invention peut de plus comporter une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles.  The control strategy of an electric machine according to the invention may further include one or more of the following features, which may be combined with one another.
Avantageusement, après une interdiction de la régulation en régime de la machine électrique, la stratégie met la machine électrique dans un état assurant la sécurité comportant une coupure de la commande de la machine électrique, ou un pilotage de cette machine électrique pour délivrer sur le système d'accouplement à crabot un couple nul.  Advantageously, after a prohibition of the regulation of the electric machine, the strategy puts the electric machine in a state ensuring the safety comprising a cut-off of the control of the electric machine, or a control of this electric machine to deliver on the system Coupling clutch torque zero.
Avantageusement, la stratégie autorise la régulation en régime de la machine électrique si l'écart de vitesse des deux éléments de l'accouplement à crabot est supérieur au seuil de vitesse, ou si l'écart entre la consigne de régime et le régime en cours est inférieur au seuil de régime.  Advantageously, the strategy allows the regulation of the electric machine in the speed mode if the speed difference of the two elements of the clutch coupling is greater than the speed threshold, or if the difference between the speed reference and the current speed. is below the diet threshold.
Avantageusement, le seuil de vitesse de l'écart de vitesse des deux éléments de l'accouplement, correspond en prenant en compte la démultiplication d'une transmission reliant la machine électrique à cet accouplement, à un régime maximum de cette machine électrique de Advantageously, the speed threshold of the speed difference of the two elements of the coupling corresponds by taking into account the reduction of a transmission connecting the electrical machine to this coupling, at a maximum speed of this electric machine.
300trs/mn. 300trs / min.
Avantageusement, le seuil de régime de l'écart entre la consigne de régime de la machine électrique et son régime en cours, est au maximum de 300trs/mn.  Advantageously, the speed threshold of the difference between the speed reference of the electric machine and its current speed, is at most 300trs / min.
L'invention a aussi pour objet un véhicule automobile hybride équipé d'une machine électrique entraînant des roues par un accouplement à crabot, qui comporte des moyens mettant en œuvre une stratégie de contrôle de cette machine électrique comprenant l'une quelconque des caractéristiques précédentes.  The invention also relates to a hybrid motor vehicle equipped with an electric machine driving wheels by a clutch coupling, which comprises means implementing a control strategy of this electric machine comprising any one of the preceding features.
En particulier, la machine électrique peut entraîner les roues disposées à l'arrière du véhicule. L'invention sera mieux comprise et d'autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description ci-après donnée à titre d'exemple et de manière non limitative, en référence aux dessins annexés dans lesquels : In particular, the electric machine can drive the wheels disposed at the rear of the vehicle. The invention will be better understood and other features and advantages will appear more clearly on reading the following description given by way of example and in a nonlimiting manner, with reference to the appended drawings in which:
- la figure 1 est un schéma présentant les équipements d'un véhicule hybride mettant en œuvre une stratégie de contrôle selon l'invention ; et  - Figure 1 is a diagram showing the equipment of a hybrid vehicle implementing a control strategy according to the invention; and
- la figure 2 est un graphique de décision présentant le fonctionnement de la stratégie de contrôle.  FIG. 2 is a decision graph showing the operation of the control strategy.
La figure 1 présente une machine électrique de traction du véhicule 2 présentant un régime de rotation, reliée par une première transmission 4 à un accouplement à crabot 6, comprenant un élément amont relié à un élément aval quand il est fermé. L'accouplement à crabot 6 est lié par une deuxième transmission 8 aux roues 10 d'un essieu du véhicule.  Figure 1 shows an electric vehicle traction machine 2 having a rotational speed, connected by a first transmission 4 to a dog clutch 6, comprising an upstream element connected to a downstream element when it is closed. The clutch coupling 6 is connected by a second transmission 8 to the wheels 10 of an axle of the vehicle.
La première transmission 4 peut comporter une démultiplication de la vitesse, le premier élément de l'accouplement 6 tournant à une vitesse inférieure à ce régime, ou comporter une prise directe avec l'arbre de la machine électrique 2, le premier élément de l'accouplement tournant alors à une vitesse qui est le régime de cette machine.  The first transmission 4 may include gear reduction, the first element of the coupling 6 rotating at a speed below this speed, or comprise a direct engagement with the shaft of the electric machine 2, the first element of the coupling then rotating at a speed which is the speed of this machine.
La deuxième transmission 8 peut de la même manière comporter une démultiplication de la vitesse, ou une prise directe avec les roues 10, par exemple dans le cas où l'accouplement à crabot 6 est accolé au différentiel entraînant les roues arrière du véhicule.  The second transmission 8 can in the same way include a gear reduction, or a direct engagement with the wheels 10, for example in the case where the clutch coupling 6 is attached to the differential driving the rear wheels of the vehicle.
Un superviseur 12 utilisant un calculateur électronique, réalisant la commande de la machine électrique 2 pour la traction du véhicule, reçoit une information de la vitesse des roues 14 venant d'un capteur de vitesse de ces roues, et une information du régime de la machine électrique 16 venant de cette machine.  A supervisor 12 using an electronic computer, carrying out the control of the electric machine 2 for the traction of the vehicle, receives an information of the speed of the wheels 14 coming from a speed sensor of these wheels, and information of the speed of the machine. electric 16 coming from this machine.
Le superviseur 12 établit alors des demandes envoyées à la machine électrique 2, comportant une consigne de régime 18, une consigne de couple 20, et un type de régulation qui lui est demandé 22. La machine électrique 2 répond alors à ces demandes en générant un couple conforme à la consigne de couple 20, pour atteindre un régime conforme à la consigne de régime 18, en appliquant le type de régulation demandé. The supervisor 12 then establishes requests sent to the electrical machine 2, including a speed setpoint 18, a torque setpoint 20, and a type of regulation which is required of it. The electric machine 2 then responds to these requests by generating a request. torque according to the instructions torque 20, to achieve a regime according to the regimen 18, applying the type of regulation requested.
En particulier en préparation d'une fermeture de l'accouplement à crabot 6, la consigne de couple 20 permet à la machine électrique 2 d'atteindre le plus rapidement possible la consigne de régime 18 qui lui est demandé, afin d'obtenir par l'intermédiaire de la première transmission 4 sensiblement la vitesse de synchronisation des éléments de cet accouplement, avec une marge acceptable pour un engagement sans risque.  In particular, in preparation for closing the clutch coupling 6, the torque setpoint 20 enables the electric machine 2 to reach the speed setpoint 18 which it is requested as quickly as possible, in order to obtain the desired speed. intermediate of the first transmission 4 substantially the synchronization speed of the elements of this coupling, with an acceptable margin for a commitment without risk.
On notera que la vitesse de l'élément aval de l'accouplement à crabot 6, liée à la vitesse des roues 10 en prenant en compte la démultiplication de la deuxième transmission 8, reste sensiblement constante pendant cette manœuvre.  Note that the speed of the downstream element of the clutch coupling 6, related to the speed of the wheels 10 taking into account the reduction of the second transmission 8, remains substantially constant during this maneuver.
La figure 2 présente dans le cas d'une demande de fermeture du crabot 30, une première sélection 32 qui calcule si l'écart de vitesse des deux éléments de l'accouplement à crabot 6 est inférieur à un seuil de vitesse SV.  FIG. 2 shows, in the case of a request for closing the clutch 30, a first selection 32 which calculates whether the speed difference of the two elements of the clutch coupling 6 is less than a speed threshold SV.
On a en parallèle de cette première sélection 32, une deuxième sélection 34 qui calcule si l'écart entre la consigne de régime 18 et le régime en cours 16 de la machine électrique 2, est supérieur à un seuil de régime SR.  In parallel with this first selection 32, a second selection 34 calculates whether the difference between the speed reference 18 and the current speed 16 of the electric machine 2 is greater than a speed threshold SR.
On a ensuite une opération booléenne d'addition 40 « ET », donnant si les deux sélections 32, 34 sont positives, une interdiction 36 de la régulation en régime de la machine électrique 2 préparatoire à la fermeture de l'accouplement 6.  Then, a Boolean addition operation "ET" is carried out, giving whether the two selections 32, 34 are positive, a prohibition 36 of the regulation of the electrical machine 2 in a mode that prepares for the closing of the coupling 6.
Si au moins une sélection 32, 34 est négative, on a alors une autorisation 38 de régulation en régime de la machine électrique 2, qui peut recevoir une consigne de couple 20 égale à son couple maximal.  If at least one selection 32, 34 is negative, then there is an authorization 38 for regulating the electric machine 2, which can receive a torque setpoint equal to its maximum torque.
Dans ce dernier cas on a l'assurance que l'accouplement à crabot 6 est ouvert, grâce à l'écart de vitesse de ses deux éléments qui est supérieur au seuil de vitesse SV. On évite en cas de défaillance un inconfort ou un danger. De plus si l'accouplement 6 vient d'être ouvert avec une différence de vitesse inférieure au seuil de vitesse SV, et que l'on demande aussitôt une fermeture de cet accouplement avec un écart entre la consigne de régime 18 et le régime en cours 16 inférieur au seuil de régime SR, à cause de cette faible différence de vitesse, on a l'autorisation 38 de régulation en régime de la machine électrique 2. In the latter case it is ensured that the clutch coupling 6 is open, thanks to the speed difference of its two elements which is greater than the speed threshold SV. In the event of a failure, it avoids discomfort or danger. In addition, if the coupling 6 has just been opened with a speed difference lower than the speed threshold SV, and that a closing of this coupling is immediately requested with a difference between the speed reference 18 and the current speed. 16 below the speed threshold SR, because of this small difference in speed, it is authorized 38 for regulating the electric machine 2.
Dans ce cas lors d'une défaillance avec un accouplement 6 restant fermé, la faible différence entre la consigne de régime 18 et le régime en cours 16 ne peut pas entraîner d'inconfort ou de danger important.  In this case when a failure with a coupling 6 remains closed, the small difference between the speed reference 18 and the current speed 16 can not cause discomfort or significant danger.
Avantageusement, le seuil de vitesse SV de l'accouplement 6 et le seuil de régime SR correspondent à 300trs/mn maximum de la machine électrique 2. Cette valeur maximum peut être atteinte avec l'accouplement 6 fermé compte tenu des déphasages des informations, et des jeux ainsi que de l'élasticité de la chaîne cinématique.  Advantageously, the speed threshold SV of the coupling 6 and the speed threshold SR correspond to 300trs / min maximum of the electric machine 2. This maximum value can be reached with the coupling 6 closed given the information phase shifts, and games as well as the elasticity of the driveline.
Après la détection d'une défaillance, on peut mettre la machine électrique 2 dans un état sûr 40 afin d'assurer la sécurité du véhicule, comprenant notamment une coupure de sa commande, ou son pilotage pour délivrer sur le système d'accouplement à crabot 6 un couple nul qui accompagne les changements de vitesse de rotation de cet accouplement sans appliquer d'effort dessus.  After the detection of a fault, the electrical machine 2 can be put in a safe state 40 in order to ensure the safety of the vehicle, including in particular a cut of its control, or its control to deliver on the dog clutch coupling system. 6 a zero torque that accompanies the rotational speed changes of this coupling without applying effort on it.
La stratégie de contrôle suivant l'invention augmentant la sécurité générale du véhicule, est simple et économique à mettre en œuvre, en nécessitant seulement des adaptations des programmes de contrôle de la chaîne de traction hybride, sans modification de composants.  The control strategy according to the invention increasing the general safety of the vehicle, is simple and economical to implement, requiring only adaptations of the control programs of the hybrid power train, without modification of components.

Claims

REVENDICATIONS
1 - Stratégie de contrôle d'une machine électrique (2) reliée par un système d'accouplement à crabot (6) à des roues (10) d'un véhicule automobile hybride, ce véhicule mettant en œuvre une régulation en régime de la machine électrique (2) comportant une consigne de régime (18) de synchronisation qui ajuste avec une marge les vitesses des deux éléments à relier de l'accouplement (6) afin de préparer sa fermeture, caractérisée en ce qu'elle émet une interdiction de la régulation en régime (36) de la machine électrique (2) préparant la fermeture de l'accouplement à crabot (6), si l'écart de vitesse des deux éléments de cet accouplement (6) est inférieur à un seuil de vitesse (SV), et si pour cette machine électrique (2) l'écart entre la consigne de régime (18) et son régime en cours (16) est supérieur à un seuil de régime (SR). 1 - Control strategy of an electric machine (2) connected by a clutch coupling system (6) to wheels (10) of a hybrid motor vehicle, the vehicle implementing a regulation of the machine electric motor (2) comprising a synchronization speed regulation (18) which adjusts with a margin the speeds of the two elements to be connected to the coupling (6) in order to prepare its closure, characterized in that it issues a prohibition of the speed control (36) of the electric machine (2) preparing the closing of the clutch coupling (6), if the speed difference of the two elements of this clutch (6) is less than a speed threshold (SV ), and if for this electric machine (2) the difference between the speed reference (18) and its current speed (16) is greater than a speed threshold (SR).
2 - Stratégie de contrôle selon la revendication 1 , caractérisée en ce qu'après une interdiction de la régulation en régime (36) de la machine électrique (2), elle met la machine électrique (2) dans un état assurant la sécurité comportant une coupure de la commande de la machine électrique (2), ou un pilotage de cette machine électrique (2) qui délivre sur le système d'accouplement à crabot (6) un couple nul.  2 - Control strategy according to claim 1, characterized in that after a prohibition of the regulation in regime (36) of the electric machine (2), it puts the electric machine (2) in a state ensuring the security comprising a cutting off the control of the electric machine (2), or driving this electric machine (2) which delivers on the clutch coupling system (6) a zero torque.
3 - Stratégie de contrôle selon la revendication 1 ou 2, caractérisée en ce qu'elle autorise la régulation en régime (38) de la machine électrique (2) si l'écart de vitesse des deux éléments de l'accouplement à crabot (6) est supérieur au seuil de vitesse (SV), ou si l'écart entre la consigne de régime (18) et le régime en cours (16) est inférieur au seuil de régime (SR).  3 - Control strategy according to claim 1 or 2, characterized in that it authorizes the regulation (38) of the electric machine (2) if the speed difference of the two elements of the clutch coupling (6) ) is greater than the speed threshold (SV), or if the difference between the speed reference (18) and the current speed (16) is below the speed threshold (SR).
4 - Stratégie de contrôle selon l'une quelconque des revendications précédentes, caractérisée en ce que le seuil de vitesse (SV) de l'écart de vitesse des deux éléments de l'accouplement (6), correspond en prenant en compte la démultiplication d'une transmission (4) reliant la machine électrique (2) à cet accouplement (6), à un régime maximum de cette machine électrique (2) de 300trs/mn. 5 - Stratégie de contrôle selon l'une quelconque des revendications précédentes, caractérisée en ce que le seuil de régime (SR) de l'écart entre la consigne de régime (18) de la machine électrique (2) et son régime en cours (16), est au maximum de 300trs/mn. 4 - Control strategy according to any one of the preceding claims, characterized in that the speed threshold (SV) of the speed difference of the two elements of the coupling (6), is taken into account by taking into account the reduction of a transmission (4) connecting the electric machine (2) to this coupling (6), at a maximum speed of this electric machine (2) of 300trs / min. 5 - Control strategy according to any one of the preceding claims, characterized in that the speed threshold (SR) of the difference between the speed reference (18) of the electric machine (2) and its current speed ( 16), is at most 300trs / min.
6 - Véhicule automobile hybride équipé d'une machine électrique (2) entraînant des roues (10) par un accouplement à crabot (6), caractérisé en ce qu'il comporte des moyens mettant en œuvre une stratégie de contrôle de cette machine électrique (2) selon l'une quelconque des revendications précédentes.  6 - Hybrid motor vehicle equipped with an electric machine (2) driving wheels (10) by a clutch coupling (6), characterized in that it comprises means implementing a control strategy of this electric machine ( 2) according to any one of the preceding claims.
7 - Véhicule automobile selon la revendication 6, caractérisé en ce que la machine électrique (2) entraîne les roues (10) qui sont à l'arrière du véhicule.  7 - Motor vehicle according to claim 6, characterized in that the electric machine (2) drives the wheels (10) which are at the rear of the vehicle.
PCT/FR2017/053440 2017-01-06 2017-12-07 Operation of an electrical machine of a hybrid electric vehicle prior to closing a jaw clutch WO2018127634A1 (en)

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EP17822383.0A EP3565728A1 (en) 2017-01-06 2017-12-07 Operation of an electrical machine of a hybrid electric vehicle prior to closing a jaw clutch
CN201780082723.2A CN110167777A (en) 2017-01-06 2017-12-07 For being closed the control to hybrid vehicle motor of jaw clutch

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FR1750115 2017-01-06
FR1750115A FR3061689B1 (en) 2017-01-06 2017-01-06 CHECKING A HYBRID VEHICLE ELECTRIC MACHINE FOR CLOSING A CRAB COUPLING

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MA47243A (en) 2019-11-13
FR3061689A1 (en) 2018-07-13

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