EP3661783A1 - Method and system for compensating for acyclic behaviour of a heat engine by using a rotary electric machine - Google Patents

Method and system for compensating for acyclic behaviour of a heat engine by using a rotary electric machine

Info

Publication number
EP3661783A1
EP3661783A1 EP18746695.8A EP18746695A EP3661783A1 EP 3661783 A1 EP3661783 A1 EP 3661783A1 EP 18746695 A EP18746695 A EP 18746695A EP 3661783 A1 EP3661783 A1 EP 3661783A1
Authority
EP
European Patent Office
Prior art keywords
heat engine
physical parameter
torque
cref
mechanical damper
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.)
Withdrawn
Application number
EP18746695.8A
Other languages
German (de)
French (fr)
Inventor
Pierre Tisserand
Alexandre SCHMITT
Jean-Claude Matt
Maxime Paul
Joachim Laupa
Mathieu MAZARIN
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.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur SAS
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 Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP3661783A1 publication Critical patent/EP3661783A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • 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
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/17—Control strategies specially adapted for achieving a particular effect for noise reduction
    • 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
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/20—Reducing vibrations in the driveline
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/20—Reducing vibrations in the driveline
    • B60W2030/206—Reducing vibrations in the driveline related or induced by the engine
    • 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
    • B60W2050/0001—Details of the control system
    • B60W2050/0002—Automatic control, details of type of controller or control system architecture
    • B60W2050/0008—Feedback, closed loop systems or details of feedback error signal
    • B60W2050/001—Proportional integral [PI] controller
    • 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
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0021—Differentiating means
    • 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
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0022—Gains, weighting coefficients or weighting functions
    • 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
    • B60W2050/0001—Details of the control system
    • B60W2050/0019—Control system elements or transfer functions
    • B60W2050/0028—Mathematical models, e.g. for simulation
    • B60W2050/0037—Mathematical models of vehicle sub-units
    • B60W2050/0039—Mathematical models of vehicle sub-units of the propulsion unit
    • 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
    • B60W2050/0001—Details of the control system
    • B60W2050/0043—Signal treatments, identification of variables or parameters, parameter estimation or state estimation
    • B60W2050/0052—Filtering, filters
    • 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
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0638—Engine 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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0657—Engine torque
    • 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
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0657—Engine torque
    • B60W2510/0661—Torque change rate
    • 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
    • B60W2510/088—Inertia
    • 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
    • B60W2710/083—Torque
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • a motor vehicle traction chain comprises a heat engine coupled to a gearbox via a clutch.
  • the gearbox is mechanically connected to the wheels via a differential.
  • the crankshaft of the heat engine is connected to a mechanical damper and then to the clutch to transmit energy to the wheels through the gearbox.
  • a rotating electrical machine can be installed in the traction chain to improve the energy balance of the vehicle.
  • This electric machine is able to operate in engine mode to ensure traction of the vehicle alone or in combination with the engine to provide traction assistance.
  • This machine is also able to operate in generator mode to supply energy to the vehicle battery and / or to the coupled loads on the electrical network.
  • the engine when running, exhibits torque fluctuations due to explosions and compressions of the fuel in the cylinders. These torque fluctuations result in significant variations in speed which are damped by the inertia present on the shaft of the engine. Nevertheless, the variations remain significant, causing vibration and design constraints for the mechanical parts and this, despite the presence of the damper placed on the crankshaft of the engine.
  • the invention aims to overcome, at least in part, this disadvantage by taking advantage of the presence of the rotating electrical machine placed downstream of the mechanical damper.
  • the subject of the invention is a method for compensating the acyclisms of a motor vehicle engine, the thermal engine belonging to a traction system comprising: a mechanical damper,
  • a gearbox comprising at least one clutch
  • the step of measuring the physical parameter being carried out by means of a sensor arranged between the mechanical damper and the heat engine,
  • the invention thus makes it possible to reduce the torque variations of the heat engine by virtue of the rotating electric machine which performs an acyclic compensation function in addition to its generic engine and generator functions taking or supplying a current to the vehicle battery.
  • the invention thus greatly reduces the acyclism of the heat engine.
  • the step of controlling the rotating electrical machine to obtain the control torque setpoint compensates for at least part of the residual acyclism from the mechanical damper and entering the gearbox via the clutch.
  • the step of determining the torque variation related to the acyclism takes into account a transfer function due solely to the mechanical damper.
  • the step of determining the variation of torque related to the acyclism comprises a step of applying, on the signal of measurement of the physical parameter, a filter representative of a damping of the acyclism of the engine by the mechanical damper.
  • the filter representative of a damping of the acyclism of the heat engine by the mechanical damper is determined as a function of the entire kinematic chain.
  • the filter representative of the damping of the acyclism takes into account an inertial load applied to the mechanical damper, for example the weight of the rotating electrical machine and the damper.
  • said method comprises a step of removing a DC component of the measurement signal of the physical parameter.
  • said method comprises a step of inverting the measurement signal of the physical parameter whose DC component has been suppressed.
  • the physical parameter measured is a pair.
  • the physical parameter measured is a rotational speed.
  • said method further comprises a phase correction step for converting the rotational speed into torque.
  • the rotating electrical machine is disposed between the clutch of the gearbox and the mechanical damper.
  • the rotating electrical machine is disposed between two clutches, so as to allow an electric driving mode and a thermal rolling mode of the motor vehicle.
  • the invention also relates to a system for compensating the acyclisms of a motor vehicle engine, the thermal engine belonging to a power train comprising:
  • a gearbox comprising at least one clutch
  • said system comprises: a sensor for measuring a physical parameter related to the rotation of a crankshaft of the heat engine, said measuring sensor being arranged between the mechanical damper and the heat engine,
  • Figures 1a and 1b are diagrammatic representations illustrating two embodiments of a motor vehicle traction chain with which is implemented the method of compensating acydisms of the engine according to the present invention
  • Figure 2a is a schematic representation of a first embodiment of a heat engine acydism compensation system according to the present invention
  • FIG. 2b is a diagram of the steps of the method according to the invention implemented with the acydism compensation system of FIG. 2a;
  • FIG. 3a is a diagrammatic representation of a second embodiment of a heat engine acydism compensation system according to the present invention.
  • FIG. 3b is a diagram of the steps of the method according to the invention implemented with the acydism compensation system of FIG. 3a;
  • Figures 1a and 1b show a traction chain 10 implanted on a train 1 1 of a motor vehicle.
  • This traction chain 10 comprises a heat engine 12 and a gearbox 13 provided with an input shaft 13.1 and an output shaft 13.2 connected to the wheels via a differential 16.
  • a clutch K1 is interposed between the heat engine 12 and the input shaft 13.1 of the gearbox 13.
  • a reversible type rotating electric machine 17 is disposed between the clutch K1 and the heat engine 12. More precisely, this electric machine 17 is disposed between the clutch K1 and a mechanical damper 20 mounted on the crankshaft of the heat engine 12.
  • the electrical machine 17 is able to operate in a generator mode during a regenerative braking phase delivering current on the network, for example to recharge a battery (not shown) and / or supply current to loads, as well as in a engine mode to assist the engine 12 and, if appropriate with the open clutch KO to ensure electric driving of the vehicle, as shown in Figure 1 b.
  • the mechanical damper 20, the electric machine 17, as well as the clutch K1 are contained in the same housing 21.
  • An optional rotary electric machine 24 may be coupled to the heat engine 12 via the front face, on the accessory front belt.
  • the motion transmission device 25 between the heat engine 12 and the electric machine 24 may, for example, comprise a belt cooperating with pulleys carried respectively by the crankshaft and the shaft of the machine 24.
  • This electric machine 24, commonly known as the starter, is adapted to operate in a generator mode to recharge the vehicle battery as well as in a motor mode to ensure a start of the engine 12 while the vehicle is at a standstill or during a transition of a mode of electric taxiing to a thermal taxiing mode.
  • the electric machine 17 preferably has an operating voltage of 48V. Alternatively, the machine 17 may have an operating voltage in the range 48V and 350V.
  • the electric machine 24 has an operating voltage of 12V, 24V, or 48V.
  • the electrical machines 17, 24 may for example be synchronous type permanent magnet machines, and synchronous wound rotor. It is possible to use asynchronous machines.
  • the second clutch KO is used.
  • the electric machine 17 is mounted between the first clutch K1 and the second clutch KO.
  • the clutch KO is open while K1 is closed.
  • the two clutches K0 and K1 are closed.
  • a sensor 27 of torque-meter type disposed between the mechanical damper 20 and the heat engine 12 provides, in a step 100, a measurement of the crankshaft torque of the heat engine 12.
  • the torque measurement signal obtained is referenced S_C.
  • a step 101 the torque variation related to the acyclism of the heat engine 12 is then determined from the measured torque.
  • a step 102 the DC component of the torque signal S_C is suppressed by means of the module 29.
  • the output signal S_C of the DC component suppression module 29 is inverted and comprises a gain that can be unitary by means of the module 30.
  • a filter 33 is applied, in a step 104, to the signal coming from the inverter module 30.
  • This filter 33 is representative of a damping of the kinematic chain, that is to say a damping of the acyclism of the engine
  • This filter 33 takes account in particular of the inertial load applied to the damper, for example the weight of the electric machine 17 and the damper 20.
  • this torque variation is combined, with the aid of an adder 34, with a reference torque reference Cref of the rotating electrical machine 17, to determine a control torque setpoint Cref which integrates the variation of torque to be applied to compensate for the acyclism of the heat engine 12. It is specified here that an adder 34 has been used, since the signal S_C has previously been inverted with the aid of the module 30. As a variant, in a strictly equivalent manner, it would be possible to remove the inverter module 30 and use a comparator module subtracting the torque variation associated with acyclism reference torque Cref.
  • the rotating electrical machine 17 is then driven, in step 106, to obtain the control torque setpoint Cref.
  • control torque setpoint Cref is applied in a conventional torque control chain 36 of the electric machine 17.
  • This chain 36 comprises a comparator 37 for comparing the input control torque signal Cref with the output signal of a model 38 of the rotary electrical machine 17.
  • This model 38 is in connection with power modules 39 of a transistor rectifier bridge also having an inverter function for injecting currents into the phase windings of the stator 17.1 in order to obtain the desired control torque set point Cref on the shaft on which the rotor 17.2 of the machine 17 is mounted.
  • the output signal of the comparator 37 is advantageously corrected by means of a corrector 42 for example PI (Proportional-Integral) or P (Proportional).
  • the speed measurement signal obtained is referenced S V.
  • a speed sensor 27 'disposed between the mechanical damper 20 and the heat engine 12 provides, in a step 100, a measurement of the speed of rotation of the crankshaft of the heat engine 12.
  • a step 101 the torque variation related to the acyclism of the heat engine 12 is then determined from the rotational speed measured.
  • a step 102 the DC component of the speed signal S_V is suppressed by means of the module 29.
  • a filter 33 is applied, in a step 104, to the signal coming from the inverter module 30.
  • This filter 33 is representative of a damping of the acyclism of the heat engine 12 by the mechanical damper 20.
  • This filter 33 takes account in particular of the inertial load applied to the damper, for example the weight of the electric machine 17 and the shock absorber 20.
  • a phase correction is applied, via the module 41, on the signal from the filter 33 to convert the rotational speed into a torque variation related to acyclism.
  • the applied phase shift is 90 degrees.
  • this torque variation is combined, with the aid of an adder 34, with a reference torque reference Cref of the rotating electrical machine 17, to determine a command torque setpoint Cref which integrates the torque variable to be applied to compensate for the acyclism of the heat engine 12. It is specified here that an adder 34 has been used, since the signal S_C has previously been inverted with the aid of the module 30.
  • the control torque setpoint Cref is applied in a conventional torque control chain 36 of the electric machine 17.
  • This chain 36 comprises a comparator 37 for comparing the input control torque signal Cref with the output signal of a model 38 of the rotary electrical machine 17.
  • This model 38 is in connection with power modules 39 of a transistor rectifier bridge also having an inverter function for injecting currents into the phase windings of the stator 17.1 in order to obtain the desired control torque set point Cref on the shaft on which the rotor 17.2 of the machine 17 is mounted.
  • the output signal of the comparator 37 is advantageously corrected by means of a corrector 42 for example PI (Proportional-Integral) or P (Proportional).

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention relates chiefly to a method for compensating for acyclic behaviour of a motor vehicle heat engine (12), the heat engine (12) belonging to a powertrain (10), characterized in that the said method involves: – a step of measuring a physical parameter associated with the rotation of a crankshaft of the heat engine (12), the step of measuring the physical parameter being performed by means of a sensor (27, 27') located between the mechanical damper (20) and the heat engine (12), – a step of determining, from the measured physical parameter, a variation in torque associated with the acyclic behaviour of the heat engine (12), taking account of a transfer function caused by the mechanical damper (20), – a step of subtracting this variation in torque from a reference setpoint torque (Cref) of the rotary electric machine (17) in order to determine a control setpoint torque (Cref'), – a step (106) of operating the rotary electric machine (17) in order to obtain the control setpoint torque (Cref').

Description

PROCÉDÉ ET SYSTÈME DE COMPENSATION DES ACYCLISMES D'UN MOTEUR THERMIQUE PAR UNE MACHINE ÉLECTRIQUE TOURNANTE  METHOD AND SYSTEM FOR COMPENSATING ACYCLISMS OF A THERMAL MOTOR BY A ROTATING ELECTRIC MACHINE
La présente invention porte sur un procédé et un système de compensation des acyclismes du moteur thermique par une machine électrique tournante. De façon connue en soi, une chaîne de traction de véhicule automobile comporte un moteur thermique accouplé à une boîte de vitesses par l'intermédiaire d'un embrayage. La boîte de vitesses est reliée mécaniquement aux roues par l'intermédiaire d'un différentiel. Généralement, le vilebrequin du moteur thermique est connecté à un amortisseur mécanique puis à l'embrayage pour transmettre l'énergie aux roues au travers de la boîte de vitesses. The present invention relates to a method and a system for compensating thermal motor acyclisms by a rotating electrical machine. In a manner known per se, a motor vehicle traction chain comprises a heat engine coupled to a gearbox via a clutch. The gearbox is mechanically connected to the wheels via a differential. Generally, the crankshaft of the heat engine is connected to a mechanical damper and then to the clutch to transmit energy to the wheels through the gearbox.
Par ailleurs, une machine électrique tournante peut être implantée dans la chaîne de traction pour améliorer le bilan énergétique du véhicule. Cette machine électrique est apte à fonctionner en mode moteur pour assurer une traction du véhicule seule ou en combinaison avec le moteur thermique pour assurer une aide à la traction. Cette machine est également apte à fonctionner en mode générateur pour fournir de l'énergie à la batterie du véhicule et/ou aux charges couplées sur le réseau électrique. Moreover, a rotating electrical machine can be installed in the traction chain to improve the energy balance of the vehicle. This electric machine is able to operate in engine mode to ensure traction of the vehicle alone or in combination with the engine to provide traction assistance. This machine is also able to operate in generator mode to supply energy to the vehicle battery and / or to the coupled loads on the electrical network.
Le moteur thermique, lorsqu'il tourne, présente des fluctuations de couple dues aux explosions et compressions du carburant dans les cylindres. Ces fluctuations de couple se traduisent par des variations importantes de vitesse qui sont amorties par l'inertie présente sur l'arbre du moteur thermique. Néanmoins, les variations restent importantes, provoquant des vibrations et des contraintes de conception pour les pièces mécaniques et cela, malgré la présence de l'amortisseur placé sur le vilebrequin du moteur thermique. The engine, when running, exhibits torque fluctuations due to explosions and compressions of the fuel in the cylinders. These torque fluctuations result in significant variations in speed which are damped by the inertia present on the shaft of the engine. Nevertheless, the variations remain significant, causing vibration and design constraints for the mechanical parts and this, despite the presence of the damper placed on the crankshaft of the engine.
L'invention a pour but de palier, au moins en partie, à cet inconvénient en tirant profit de la présence de la machine électrique tournante placée en aval de l'amortisseur mécanique. The invention aims to overcome, at least in part, this disadvantage by taking advantage of the presence of the rotating electrical machine placed downstream of the mechanical damper.
A cet effet, l'invention a pour objet un procédé de compensation des acyclismes d'un moteur thermique de véhicule automobile, le moteur thermique appartenant à une chaîne de traction comportant: - un amortisseur mécanique, For this purpose, the subject of the invention is a method for compensating the acyclisms of a motor vehicle engine, the thermal engine belonging to a traction system comprising: a mechanical damper,
- une machine électrique tournante,  - a rotating electrical machine,
- une boîte de vitesses comportant au moins un embrayage,  a gearbox comprising at least one clutch,
caractérisé en ce que ledit procédé comporte: characterized in that said method comprises:
- une étape de mesure d'un paramètre physique lié à la rotation d'un arbre de sortie du moteur thermique, a step of measuring a physical parameter related to the rotation of an output shaft of the heat engine,
- l'étape de mesure du paramètre physique étant réalisée au moyen d'un capteur disposé entre l'amortisseur mécanique et le moteur thermique, the step of measuring the physical parameter being carried out by means of a sensor arranged between the mechanical damper and the heat engine,
- une étape de détermination, à partir du paramètre physique mesuré, d'une variation de couple liée à l'acyclisme du moteur thermique prenant en compte une fonction de transfert due à l'amortisseur mécanique, a step of determining, based on the measured physical parameter, a torque variation related to the acyclism of the heat engine taking into account a transfer function due to the mechanical damper,
- une étape de soustraction de cette variation de couple à une consigne de couple de référence de la machine électrique tournante, pour déterminer une consigne de couple de commande,  a step of subtracting this torque variation from a reference torque reference of the rotating electrical machine, in order to determine a command torque setpoint,
- une étape de pilotage de la machine électrique tournante pour obtenir la consigne de couple de commande. - A step of controlling the rotating electrical machine to obtain the control torque setpoint.
L'invention permet ainsi de réduire les variations de couple du moteur thermique grâce à la machine électrique tournante qui réalise une fonction de compensation des acyclismes en plus de ses fonctions génériques de moteur et de générateur prenant ou fournissant un courant à la batterie du véhicule. L'invention permet ainsi de réduire fortement l'acyclisme du moteur thermique. The invention thus makes it possible to reduce the torque variations of the heat engine by virtue of the rotating electric machine which performs an acyclic compensation function in addition to its generic engine and generator functions taking or supplying a current to the vehicle battery. The invention thus greatly reduces the acyclism of the heat engine.
L'étape de pilotage de la machine électrique tournante pour obtenir la consigne de couple de commande permet de compenser au moins une partie de l'acyclisme résiduel issu de l'amortisseur mécanique et entrant dans la boîte de vitesse via l'embrayage.  The step of controlling the rotating electrical machine to obtain the control torque setpoint compensates for at least part of the residual acyclism from the mechanical damper and entering the gearbox via the clutch.
Selon une mise en œuvre, l'étape de détermination de la variation de couple liée à l'acyclisme, prend en compte une fonction de transfert due uniquement à l'amortisseur mécanique. Selon une mise en œuvre, l'étape de détermination de la variation de couple liée à l'acyclisme comporte une étape d'application, sur le signal de mesure du paramètre physique, d'un filtre représentatif d'un amortissement de l'acyclisme du moteur thermique par l'amortisseur mécanique. Selon une mise en œuvre, le filtre représentatif d'un amortissement de l'acyclisme du moteur thermique par l'amortisseur mécanique est déterminé en fonction de l'ensemble de la chaîne cinématique. According to one implementation, the step of determining the torque variation related to the acyclism, takes into account a transfer function due solely to the mechanical damper. According to one embodiment, the step of determining the variation of torque related to the acyclism comprises a step of applying, on the signal of measurement of the physical parameter, a filter representative of a damping of the acyclism of the engine by the mechanical damper. According to one embodiment, the filter representative of a damping of the acyclism of the heat engine by the mechanical damper is determined as a function of the entire kinematic chain.
Selon une mise en œuvre, le filtre représentatif de l'amortissement de l'acyclisme tient compte une charge inertielle appliquée sur l'amortisseur mécanique, par exemple du poids de la machine électrique tournante et de l'amortisseur. According to one embodiment, the filter representative of the damping of the acyclism takes into account an inertial load applied to the mechanical damper, for example the weight of the rotating electrical machine and the damper.
Selon une mise en œuvre, préalablement à l'étape d'application du filtre représentatif de l'amortissement, ledit procédé comporte une étape de suppression d'une composante continue du signal de mesure du paramètre physique. According to one implementation, prior to the step of applying the filter representative of damping, said method comprises a step of removing a DC component of the measurement signal of the physical parameter.
Selon une mise en œuvre, ledit procédé comporte une étape d'inversion du signal de mesure du paramètre physique dont la composante continue a été supprimée. Selon une mise en œuvre, le paramètre physique mesuré est un couple. According to one implementation, said method comprises a step of inverting the measurement signal of the physical parameter whose DC component has been suppressed. According to one implementation, the physical parameter measured is a pair.
Selon une mise en œuvre, le paramètre physique mesuré est une vitesse de rotation. Dans ce cas, ledit procédé comporte en outre une étape de correction de phase afin de convertir la vitesse de rotation en couple. According to one implementation, the physical parameter measured is a rotational speed. In this case, said method further comprises a phase correction step for converting the rotational speed into torque.
Selon une mise en œuvre, la machine électrique tournante est disposée entre l'embrayage de la boîte de vitesse et l'amortisseur mécanique. According to one embodiment, the rotating electrical machine is disposed between the clutch of the gearbox and the mechanical damper.
Selon une mise en œuvre, la machine électrique tournante est disposée entre deux embrayages, de sorte à permettre un mode de roulage électrique et un mode de roulage thermique du véhicule automobile. According to one embodiment, the rotating electrical machine is disposed between two clutches, so as to allow an electric driving mode and a thermal rolling mode of the motor vehicle.
L'invention a également pour objet un système de compensation des acyclismes d'un moteur thermique de véhicule automobile, le moteur thermique appartenant à une chaîne de traction comportant: The invention also relates to a system for compensating the acyclisms of a motor vehicle engine, the thermal engine belonging to a power train comprising:
- un amortisseur mécanique,  a mechanical damper,
- une machine électrique tournante,  - a rotating electric machine,
- une boîte de vitesses comportant au moins un embrayage,  a gearbox comprising at least one clutch,
caractérisé en ce que ledit système comporte: - un capteur de mesure d'un paramètre physique lié à la rotation d'un vilebrequin du moteur thermique, ledit capteur de mesure étant disposé entre l'amortisseur mécanique et le moteur thermique, characterized in that said system comprises: a sensor for measuring a physical parameter related to the rotation of a crankshaft of the heat engine, said measuring sensor being arranged between the mechanical damper and the heat engine,
- des moyens de détermination, à partir du paramètre physique mesuré, d'une variation de couple liée à l'acyclisme du moteur thermique,  means for determining, from the measured physical parameter, a torque variation related to the acyclism of the heat engine,
- des moyens de soustraction de cette variation de couple à une consigne de couple de référence de la machine électrique tournante, pour déterminer une consigne de couple de commande,  means for subtracting this torque variation from a reference torque reference of the rotating electrical machine, in order to determine a control torque setpoint,
- des moyens de pilotage de la machine électrique tournante pour obtenir la consigne de couple de commande.  - Control means of the rotating electrical machine to obtain the control torque setpoint.
L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Ces figures ne sont données qu'à titre illustratif mais nullement limitatif de l'invention. The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These figures are given for illustrative but not limiting of the invention.
Les figures 1 a et 1 b sont des représentations schématiques illustrant deux modes de réalisation d'une chaîne de traction pour véhicule automobile avec laquelle est mis en œuvre le procédé de compensation des acydismes du moteur thermique selon la présente invention; Figures 1a and 1b are diagrammatic representations illustrating two embodiments of a motor vehicle traction chain with which is implemented the method of compensating acydisms of the engine according to the present invention;
La figure 2a est une représentation schématique d'un premier mode de réalisation d'un système de compensation des acydismes du moteur thermique selon la présente invention; Figure 2a is a schematic representation of a first embodiment of a heat engine acydism compensation system according to the present invention;
La figure 2b est un diagramme des étapes du procédé selon l'invention mis en œuvre avec le système de compensation des acydismes de la figure 2a; FIG. 2b is a diagram of the steps of the method according to the invention implemented with the acydism compensation system of FIG. 2a;
La figure 3a est une représentation schématique d'un deuxième mode de réalisation d'un système de compensation des acydismes du moteur thermique selon la présente invention; FIG. 3a is a diagrammatic representation of a second embodiment of a heat engine acydism compensation system according to the present invention;
La figure 3b est un diagramme des étapes du procédé selon l'invention mis en œuvre avec le système de compensation des acydismes de la figure 3a; FIG. 3b is a diagram of the steps of the method according to the invention implemented with the acydism compensation system of FIG. 3a;
Les éléments identiques, similaires, ou analogues, conservent la même référence d'une figure à l'autre. Les figures 1 a et 1 b montrent une chaîne de traction 10 implantée sur un train 1 1 d'un véhicule automobile. Identical, similar or similar elements retain the same reference from one figure to another. Figures 1a and 1b show a traction chain 10 implanted on a train 1 1 of a motor vehicle.
Cette chaîne de traction 10 comporte un moteur thermique 12 et une boîte de vitesses 13 munie d'un arbre d'entrée 13.1 et d'un arbre de sortie 13.2 connecté aux roues par l'intermédiaire d'un différentiel 16. Un embrayage K1 est interposé entre le moteur thermique 12 et l'arbre d'entrée 13.1 de la boîte de vitesses 13. This traction chain 10 comprises a heat engine 12 and a gearbox 13 provided with an input shaft 13.1 and an output shaft 13.2 connected to the wheels via a differential 16. A clutch K1 is interposed between the heat engine 12 and the input shaft 13.1 of the gearbox 13.
Une machine électrique tournante 17 de type réversible est disposée entre l'embrayage K1 et le moteur thermique 12. Plus précisément, cette machine électrique 17 est disposée entre l'embrayage K1 et un amortisseur mécanique 20 monté sur le vilebrequin du moteur thermique 12. A reversible type rotating electric machine 17 is disposed between the clutch K1 and the heat engine 12. More precisely, this electric machine 17 is disposed between the clutch K1 and a mechanical damper 20 mounted on the crankshaft of the heat engine 12.
La machine électrique 17 est apte à fonctionner dans un mode générateur lors d'une phase de freinage récupératif délivrant du courant sur le réseau par exemple pour recharger une batterie (non représentée) et/ou fournir du courant à des charges, ainsi que dans un mode moteur pour assister le moteur thermique 12 et, le cas échéant avec l'embrayage KO ouvert pour assurer un roulage électrique du véhicule, tel que cela est montré sur la figure 1 b. The electrical machine 17 is able to operate in a generator mode during a regenerative braking phase delivering current on the network, for example to recharge a battery (not shown) and / or supply current to loads, as well as in a engine mode to assist the engine 12 and, if appropriate with the open clutch KO to ensure electric driving of the vehicle, as shown in Figure 1 b.
Avantageusement, comme cela est représenté sur les figures 2a et 3a, l'amortisseur mécanique 20, la machine électrique 17, ainsi que l'embrayage K1 sont contenus dans un même boîtier 21 . Advantageously, as shown in FIGS. 2a and 3a, the mechanical damper 20, the electric machine 17, as well as the clutch K1 are contained in the same housing 21.
Une machine électrique tournante 24 optionnelle pourra être accouplée au moteur thermique 12 via la face avant, sur la courroie façade accessoires. Le dispositif de transmission de mouvement 25 entre le moteur thermique 12 et la machine électrique 24 pourra par exemple comporter une courroie coopérant avec des poulies portées respectivement par le vilebrequin et l'arbre de la machine 24. Cette machine électrique 24, appelée communément alterno-démarreur, est apte à fonctionner dans un mode générateur pour recharger la batterie du véhicule ainsi que dans un mode moteur pour assurer un démarrage du moteur thermique 12 alors que le véhicule est à l'arrêt ou lors d'une transition d'un mode de roulage électrique vers un mode de roulage thermique. La machine électrique 17 présente de préférence une tension de fonctionnement de 48V. En variante, la machine 17 peut présenter une tension de fonctionnement comprise dans la gamme 48V et 350V. La machine électrique 24 présente une tension de fonctionnement de 12V, 24V, ou 48V. Les machines électriques 17, 24 pourront respectivement par exemple être des machines de type synchrone à aimants permanents, et synchrone à rotor bobiné. Il est possible d'utiliser des machines asynchrones. An optional rotary electric machine 24 may be coupled to the heat engine 12 via the front face, on the accessory front belt. The motion transmission device 25 between the heat engine 12 and the electric machine 24 may, for example, comprise a belt cooperating with pulleys carried respectively by the crankshaft and the shaft of the machine 24. This electric machine 24, commonly known as the starter, is adapted to operate in a generator mode to recharge the vehicle battery as well as in a motor mode to ensure a start of the engine 12 while the vehicle is at a standstill or during a transition of a mode of electric taxiing to a thermal taxiing mode. The electric machine 17 preferably has an operating voltage of 48V. Alternatively, the machine 17 may have an operating voltage in the range 48V and 350V. The electric machine 24 has an operating voltage of 12V, 24V, or 48V. The electrical machines 17, 24 may for example be synchronous type permanent magnet machines, and synchronous wound rotor. It is possible to use asynchronous machines.
Dans le mode de réalisation de la figure 1 b, on fait appel au deuxième embrayage KO. La machine électrique 17 est montée entre le premier embrayage K1 et le deuxième embrayage KO. Ainsi, dans un mode de fonctionnement électrique, l'embrayage KO est ouvert tandis que K1 est fermé. Dans un mode de fonctionnement thermique, les deux embrayages KO et K1 sont fermés. On décrit ci-après, en référence avec les figures 2a et 2b, une première mise en œuvre du système et du procédé de compensation des acyclismes du moteur thermique 12 selon l'invention. In the embodiment of FIG. 1 b, the second clutch KO is used. The electric machine 17 is mounted between the first clutch K1 and the second clutch KO. Thus, in an electrical operating mode, the clutch KO is open while K1 is closed. In a thermal operating mode, the two clutches K0 and K1 are closed. With reference to FIGS. 2a and 2b, a first implementation of the system and method for compensating the acyclisms of the heat engine 12 according to the invention will be described below.
Un capteur 27 de type couple-mètre disposé entre l'amortisseur mécanique 20 et le moteur thermique 12 assure, dans une étape 100, une mesure du couple du vilebrequin du moteur thermique 12. Le signal de mesure de couple obtenu est référencé S_C. A sensor 27 of torque-meter type disposed between the mechanical damper 20 and the heat engine 12 provides, in a step 100, a measurement of the crankshaft torque of the heat engine 12. The torque measurement signal obtained is referenced S_C.
Dans une étape 101 , on détermine ensuite, à partir du couple mesuré, la variation de couple liée à l'acyclisme du moteur thermique 12. In a step 101, the torque variation related to the acyclism of the heat engine 12 is then determined from the measured torque.
A cet effet, dans une étape 102, la composante continue du signal de couple S_C est supprimée au moyen du module 29. For this purpose, in a step 102, the DC component of the torque signal S_C is suppressed by means of the module 29.
Dans une étape 103, le signal S_C de sortie du module 29 de suppression de composante continue est inversé et comporte un gain qui peut être unitaire au moyen du module 30. In a step 103, the output signal S_C of the DC component suppression module 29 is inverted and comprises a gain that can be unitary by means of the module 30.
Puis, un filtre 33 est appliqué, dans une étape 104, sur le signal issu du module inverseur 30. Ce filtre 33 est représentatif d'un amortissement de la chaîne cinématique, c'est-à-dire un amortissement de l'acyclisme du moteur thermique 12 par l'amortisseur mécanique 20. Ce filtre 33 tient compte notamment de la charge inertielle appliquée sur l'amortisseur, par exemple du poids de la machine électrique 17 et de l'amortisseur 20. Then, a filter 33 is applied, in a step 104, to the signal coming from the inverter module 30. This filter 33 is representative of a damping of the kinematic chain, that is to say a damping of the acyclism of the engine This filter 33 takes account in particular of the inertial load applied to the damper, for example the weight of the electric machine 17 and the damper 20.
Dans une étape 105, cette variation de couple est combinée, à l'aide d'un additionneur 34, avec une consigne de couple de référence Cref de la machine électrique tournante 17, pour déterminer une consigne de couple de commande Cref qui intègre la variation de couple à appliquer pour compenser l'acyclisme du moteur thermique 12. On précise ici qu'un additionneur 34 a été utilisé, car le signal S_C a préalablement été inversé à l'aide du module 30. En variante, de façon strictement équivalente, il serait possible de supprimer le module inverseur 30 et d'utiliser un module comparateur soustrayant la variation de couple liée à l'acyclisme au couple de référence Cref. In a step 105, this torque variation is combined, with the aid of an adder 34, with a reference torque reference Cref of the rotating electrical machine 17, to determine a control torque setpoint Cref which integrates the variation of torque to be applied to compensate for the acyclism of the heat engine 12. It is specified here that an adder 34 has been used, since the signal S_C has previously been inverted with the aid of the module 30. As a variant, in a strictly equivalent manner, it would be possible to remove the inverter module 30 and use a comparator module subtracting the torque variation associated with acyclism reference torque Cref.
La machine électrique tournante 17 est ensuite pilotée, dans étape 106, pour obtenir la consigne de couple de commande Cref. The rotating electrical machine 17 is then driven, in step 106, to obtain the control torque setpoint Cref.
A cet effet, la consigne de couple de commande Cref est appliquée dans une chaîne 36 d'asservissement en couple classique de la machine électrique 17. Cette chaîne 36 comporte un comparateur 37 pour comparer le signal de couple de commande d'entrée Cref avec le signal de sortie d'un modèle 38 de la machine électrique tournante 17. Ce modèle 38 est en relation avec des modules de puissance 39 d'un pont redresseur à transistors ayant également une fonction d'onduleur pour injecter des courants dans les enroulements de phase du stator 17.1 afin d'obtenir la consigne de couple de commande souhaitée Cref sur l'arbre sur lequel est monté le rotor 17.2 de la machine 17. Le signal de sortie du comparateur 37 est avantageusement corrigé à l'aide d'un correcteur 42, par exemple de type PI (Proportionnel-Intégral) ou P(Proportionnel). For this purpose, the control torque setpoint Cref is applied in a conventional torque control chain 36 of the electric machine 17. This chain 36 comprises a comparator 37 for comparing the input control torque signal Cref with the output signal of a model 38 of the rotary electrical machine 17. This model 38 is in connection with power modules 39 of a transistor rectifier bridge also having an inverter function for injecting currents into the phase windings of the stator 17.1 in order to obtain the desired control torque set point Cref on the shaft on which the rotor 17.2 of the machine 17 is mounted. The output signal of the comparator 37 is advantageously corrected by means of a corrector 42 for example PI (Proportional-Integral) or P (Proportional).
On décrit ci-après, en référence avec les figures 3a et 3b, une deuxième mise en œuvre du système et du procédé de compensation des acyclismes du moteur thermique 12 selon l'invention. Le signal de mesure de vitesse obtenu est référencé S V. Un capteur de vitesse 27' disposé entre l'amortisseur mécanique 20 et le moteur thermique 12 assure, dans une étape 100, une mesure de la vitesse de rotation du vilebrequin du moteur thermique 12. With reference to FIGS. 3a and 3b, a second implementation of the system and method for compensating the acyclisms of the heat engine 12 according to the invention is described below. The speed measurement signal obtained is referenced S V. A speed sensor 27 'disposed between the mechanical damper 20 and the heat engine 12 provides, in a step 100, a measurement of the speed of rotation of the crankshaft of the heat engine 12.
Dans une étape 101 , on détermine ensuite, à partir de la vitesse de rotation mesurée, la variation de couple liée à l'acyclisme du moteur thermique 12. In a step 101, the torque variation related to the acyclism of the heat engine 12 is then determined from the rotational speed measured.
A cet effet, dans une étape 102, la composante continue du signal de vitesse S_V est supprimée au moyen du module 29. For this purpose, in a step 102, the DC component of the speed signal S_V is suppressed by means of the module 29.
Dans une étape 103, le signal S_V de sortie du module 29 de suppression de composante continue est inversé au moyen du module 30. Puis, un filtre 33 est appliqué, dans une étape 104, sur le signal issu du module inverseur 30. Ce filtre 33 est représentatif d'un amortissement de l'acyclisme du moteur thermique 12 par l'amortisseur mécanique 20. Ce filtre 33 tient compte notamment de la charge inertielle appliquée sur l'amortisseur, par exemple du poids de la machine électrique 17 et de l'amortisseur 20. In a step 103, the output signal S_V of the DC component suppression module 29 is inverted by means of the module 30. Then, a filter 33 is applied, in a step 104, to the signal coming from the inverter module 30. This filter 33 is representative of a damping of the acyclism of the heat engine 12 by the mechanical damper 20. This filter 33 takes account in particular of the inertial load applied to the damper, for example the weight of the electric machine 17 and the shock absorber 20.
Dans une étape 105, une correction de phase est appliquée, via le module 41 , sur le signal issu du filtre 33 pour convertir la vitesse de rotation en une variation de couple liée à l'acyclisme. En l'occurrence, le déphasage appliqué est de 90 degrés. Dans une étape 106, cette variation de couple est combinée, à l'aide d'un additionneur 34, avec une consigne de couple de référence Cref de la machine électrique tournante 17, pour déterminer une consigne de couple de commande Cref qui intègre le couple variable à appliquer pour compenser l'acyclisme du moteur thermique 12. On précise ici qu'un additionneur 34 a été utilisé, car le signal S_C a préalablement été inversé à l'aide du module 30. En variante, de façon strictement équivalente, il serait possible de supprimer le module inverseur 30 et d'utiliser un module comparateur soustrayant la variation de couple liée à l'acyclisme au couple de référence Cref. La machine électrique tournante 17 est ensuite pilotée, dans étape 107, pour obtenir la consigne de couple de commande Cref. A cet effet, la consigne de couple de commande Cref est appliquée dans une chaîne 36 d'asservissement en couple classique de la machine électrique 17. Cette chaîne 36 comporte un comparateur 37 pour comparer le signal de couple de commande d'entrée Cref avec le signal de sortie d'un modèle 38 de la machine électrique tournante 17. Ce modèle 38 est en relation avec des modules de puissance 39 d'un pont redresseur à transistors ayant également une fonction d'onduleur pour injecter des courants dans les enroulements de phase du stator 17.1 afin d'obtenir la consigne de couple de commande souhaitée Cref sur l'arbre sur lequel est monté le rotor 17.2 de la machine 17. Le signal de sortie du comparateur 37 est avantageusement corrigé à l'aide d'un correcteur 42 par exemple de type PI (Proportionnel-Intégral) ou P(Proportionnel). In a step 105, a phase correction is applied, via the module 41, on the signal from the filter 33 to convert the rotational speed into a torque variation related to acyclism. In this case, the applied phase shift is 90 degrees. In a step 106, this torque variation is combined, with the aid of an adder 34, with a reference torque reference Cref of the rotating electrical machine 17, to determine a command torque setpoint Cref which integrates the torque variable to be applied to compensate for the acyclism of the heat engine 12. It is specified here that an adder 34 has been used, since the signal S_C has previously been inverted with the aid of the module 30. As a variant, in a strictly equivalent manner, it is it would be possible to remove the inverter module 30 and use a comparator module subtracting the torque variation associated with the acyclic reference torque Cref. The rotating electrical machine 17 is then driven, in step 107, to obtain the command torque setpoint Cref. For this purpose, the control torque setpoint Cref is applied in a conventional torque control chain 36 of the electric machine 17. This chain 36 comprises a comparator 37 for comparing the input control torque signal Cref with the output signal of a model 38 of the rotary electrical machine 17. This model 38 is in connection with power modules 39 of a transistor rectifier bridge also having an inverter function for injecting currents into the phase windings of the stator 17.1 in order to obtain the desired control torque set point Cref on the shaft on which the rotor 17.2 of the machine 17 is mounted. The output signal of the comparator 37 is advantageously corrected by means of a corrector 42 for example PI (Proportional-Integral) or P (Proportional).
Bien entendu, la description qui précède a été donnée à titre d'exemple uniquement et ne limite pas le domaine de l'invention dont on ne sortirait pas en remplaçant les différents éléments par tous autres équivalents. Of course, the foregoing description has been given by way of example only and does not limit the scope of the invention which would not be overcome by replacing the different elements by any other equivalent.
En outre, les différentes caractéristiques, variantes, et/ou formes de réalisation de la présente invention peuvent être associées les unes avec les autres selon diverses combinaisons, dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. In addition, the various features, variations, and / or embodiments of the present invention may be associated with each other in various combinations, to the extent that they are not incompatible or exclusive of each other.

Claims

REVENDICATIONS
1 . Procédé de compensation des acyclismes d'un moteur thermique (12) de véhicule automobile, le moteur thermique (12) appartenant à une chaîne de traction (10) comportant : 1. Method for compensating the acyclisms of a motor vehicle heat engine (12), the heat engine (12) belonging to a traction chain (10) comprising:
- un amortisseur mécanique (20),  a mechanical damper (20),
- une machine électrique tournante (17),  a rotating electric machine (17),
- une boîte de vitesses (13) comportant au moins un embrayage (K1 ), caractérisé en ce que ledit procédé comporte:  a gearbox (13) comprising at least one clutch (K1), characterized in that said method comprises:
- une étape de mesure (100) d'un paramètre physique lié à la rotation d'un arbre de sortie du moteur thermique (12),  a measurement step (100) of a physical parameter related to the rotation of an output shaft of the heat engine (12),
- l'étape de mesure du paramètre physique étant réalisée au moyen d'un capteur (27, 27') disposé entre l'amortisseur mécanique (20) et le moteur thermique (12),  the step of measuring the physical parameter being carried out by means of a sensor (27, 27 ') disposed between the mechanical damper (20) and the heat engine (12),
- une étape de détermination (101 ), à partir du paramètre physique mesuré, d'une variation de couple liée à l'acyclisme du moteur thermique a determination step (101), based on the measured physical parameter, of a torque variation related to the acyclism of the heat engine
(12) prenant en compte une fonction de transfert due à l'amortisseur mécanique (20), (12) taking into account a transfer function due to the mechanical damper (20),
- une étape de soustraction (105) de cette variation de couple à une consigne de couple de référence (Cref) de la machine électrique tournante (17), pour déterminer une consigne de couple de commande (Cref),  a step of subtracting (105) this torque variation from a reference torque reference (Cref) of the rotating electrical machine (17), in order to determine a control torque setpoint (Cref),
- une étape de pilotage (106) de la machine électrique tournante (17) pour obtenir la consigne de couple de commande (Cref).  - A step of controlling (106) the rotating electrical machine (17) to obtain the control torque setpoint (Cref).
2. Procédé selon la revendication 1 , caractérisé en ce que l'étape de détermination (101 ) de la variation de couple liée à l'acyclisme comporte une étape (104) d'application, sur le signal de mesure du paramètre physique, d'un filtre (33) représentatif d'un amortissement de l'acyclisme du moteur thermique (12) par l'amortisseur mécanique (20). 2. Method according to claim 1, characterized in that the step of determining (101) the torque variation related to the acyclism comprises a step (104) of application, on the measurement signal of the physical parameter, d a filter (33) representative of a damping of the acyclism of the heat engine (12) by the mechanical damper (20).
3. Procédé selon la revendication 2, caractérisé en ce que le filtre (33) représentatif de l'amortissement de l'acyclisme tient compte d'une charge inertielle appliquée sur l'amortisseur mécanique (20). 3. Method according to claim 2, characterized in that the filter (33) representative of the damping of acyclism takes into account an inertial load applied to the mechanical damper (20).
4. Procédé selon les revendications 2 ou 3, caractérisé en ce que préalablement à l'étape d'application du filtre (33) représentatif de l'amortissement, ledit procédé comporte une étape (102) de suppression d'une composante continue du signal de mesure du paramètre physique. 4. Method according to claims 2 or 3, characterized in that prior to the step of applying the filter (33) representative of damping, said method comprises a step (102) of removing a DC component of the measurement signal of the physical parameter.
5. Procédé selon la revendication 4, caractérisé en ce qu'il comporte une étape d'inversion (103) du signal de mesure du paramètre physique dont la composante continue a été supprimée. 5. Method according to claim 4, characterized in that it comprises a step of inversion (103) of the measurement signal of the physical parameter whose DC component has been removed.
6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le paramètre physique mesuré est un couple. 6. Method according to any one of claims 1 to 5, characterized in that the measured physical parameter is a pair.
7. Procédé selon l'une quelconque des revendications 1 à 5 caractérisé en ce que le paramètre physique mesuré est une vitesse de rotation. 7. Method according to any one of claims 1 to 5 characterized in that the measured physical parameter is a rotational speed.
8. Procédé selon la revendication 7, caractérisé en ce qu'il comporte une étape de correction de phase (105) afin de convertir la vitesse de rotation en couple. 8. Method according to claim 7, characterized in that it comprises a phase correction step (105) to convert the rotational speed torque.
9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la machine électrique tournante (17) est disposée entre l'embrayage (K1 ) de la boîte de vitesse (13) et l'amortisseur mécanique (20). 9. Method according to any one of claims 1 to 8, characterized in that the rotating electrical machine (17) is disposed between the clutch (K1) of the gearbox (13) and the mechanical damper (20) .
10. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la machine électrique tournante (17) est disposée entre deux embrayages (KO, K1 ) de sorte à permettre un mode de roulage électrique et un mode de roulage thermique du véhicule automobile. 10. Method according to any one of claims 1 to 8, characterized in that the rotary electrical machine (17) is arranged between two clutches (KO, K1) so as to allow an electric driving mode and a thermal rolling mode of the motor vehicle.
1 1 . Système de compensation des acyclismes d'un moteur thermique (12) de véhicule automobile, le moteur thermique (12) appartenant à une chaîne de traction (10) comportant: 1 1. Acyclic compensation system for a motor vehicle heat engine (12), the heat engine (12) belonging to a traction chain (10) comprising:
- un amortisseur mécanique (20),  a mechanical damper (20),
- une machine électrique tournante (17),  a rotating electric machine (17),
- une boîte de vitesses (13) comportant au moins un embrayage (K1 ), caractérisé en ce que ledit système comporte:  a gearbox (13) comprising at least one clutch (K1), characterized in that said system comprises:
- un capteur de mesure (27, 27') d'un paramètre physique lié à la rotation d'un vilebrequin du moteur thermique (12), ledit capteur de mesure a measurement sensor (27, 27 ') of a physical parameter related to the rotation of a crankshaft of the heat engine (12), said measuring sensor
(27, 27') étant disposé entre l'amortisseur mécanique (20) et le moteur thermique (12), (27, 27 ') being disposed between the mechanical damper (20) and the engine thermal (12),
- des moyens de détermination (29, 30, 33), à partir du paramètre physique mesuré, d'une variation de couple liée à racyclisnne du moteur thermique (12),  determination means (29, 30, 33), based on the measured physical parameter, of a torque variation related to the cyclic motor of the heat engine (12),
- des moyens de soustraction (37) de cette variation de couple à une consigne de couple de référence (Cref) de la machine électrique tournante (17), pour déterminer une consigne de couple de commande (Cref),  means for subtracting (37) this torque variation from a reference torque setpoint (Cref) of the rotating electrical machine (17), to determine a control torque setpoint (Cref),
- des moyens de pilotage (36, 37, 38, 39, 42) de la machine électrique tournante (17) pour obtenir la consigne de couple de commande (Cref).  - Control means (36, 37, 38, 39, 42) of the rotating electrical machine (17) to obtain the control torque setpoint (Cref).
EP18746695.8A 2017-08-04 2018-07-27 Method and system for compensating for acyclic behaviour of a heat engine by using a rotary electric machine Withdrawn EP3661783A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1757553A FR3069829B1 (en) 2017-08-04 2017-08-04 METHOD AND SYSTEM FOR COMPENSATION OF THE ACYCLISMS OF A THERMAL MOTOR BY A ROTATING ELECTRIC MACHINE
PCT/EP2018/070402 WO2019025306A1 (en) 2017-08-04 2018-07-27 Method and system for compensating for acyclic behaviour of a heat engine by using a rotary electric machine

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EP3661783A1 true EP3661783A1 (en) 2020-06-10

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CN (1) CN111094041A (en)
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JP2001136605A (en) * 1999-11-01 2001-05-18 Toyota Motor Corp Vibration damping device of driving system
JP2009067216A (en) * 2007-09-12 2009-04-02 Nissan Motor Co Ltd Vibration control device for hybrid car
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FR3069829B1 (en) 2020-11-20
WO2019025306A1 (en) 2019-02-07
FR3069829A1 (en) 2019-02-08

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