WO2021099702A1 - Method for heating a combustion engine catalyst in a hybrid architecture - Google Patents

Method for heating a combustion engine catalyst in a hybrid architecture Download PDF

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Publication number
WO2021099702A1
WO2021099702A1 PCT/FR2020/051832 FR2020051832W WO2021099702A1 WO 2021099702 A1 WO2021099702 A1 WO 2021099702A1 FR 2020051832 W FR2020051832 W FR 2020051832W WO 2021099702 A1 WO2021099702 A1 WO 2021099702A1
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WO
WIPO (PCT)
Prior art keywords
traction motor
electric traction
motor
heat engine
electric
Prior art date
Application number
PCT/FR2020/051832
Other languages
French (fr)
Inventor
Eric Schaeffer
Yohan MILHAU
Christian Noiret
Frederic Dubillard
Original Assignee
Psa Automobiles Sa
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Publication date
Application filed by Psa Automobiles Sa filed Critical Psa Automobiles Sa
Publication of WO2021099702A1 publication Critical patent/WO2021099702A1/en

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    • 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
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • 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
    • B60W20/16—Control strategies specially adapted for achieving a particular effect for reducing engine exhaust emissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/101—Three-way catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0255—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus to accelerate the warming-up of the exhaust gas treating apparatus at engine start
    • 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
    • B60W2510/0642—Idle condition
    • 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
    • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
    • B60W2530/12—Catalyst or filter state
    • 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
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • 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
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B60W2710/065—Idle condition
    • 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
    • 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
    • B60W2710/10—Change speed gearings
    • B60W2710/1005—Transmission ratio engaged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/11—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for hybrid vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/08—Parameters used for exhaust control or diagnosing said parameters being related to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1602—Temperature of exhaust gas apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D2041/026—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus using an external load, e.g. by increasing generator load or by changing the gear ratio
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems
    • 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

  • TITLE PROCESS FOR HEATING A THERMAL ENGINE CATALYST IN A HYBRID ARCHITECURE
  • the present invention relates to a method of heating a heat engine catalyst in a hybrid architecture.
  • the invention finds a particularly advantageous, but not exclusive, application for a hybrid architecture with two electric traction motors.
  • the exhaust gas depollution system of a heat engine is based on the use of a catalyst whose configuration varies depending on the engine.
  • pollution control is carried out by a catalyst, called three-way (or TWC for "Three Way catalytic Converter” in English) and a particulate filter (or GPF for " Gasoline Particulate Filter "in English).
  • pollution control is carried out by a series of catalysts, for example an oxidation catalyst (DOC for "Diesel Oxidation Catalyst") associated with a selective reduction catalyst (SCR for "Selective Catalytic Reduction” in English) and by a particulate filter.
  • DOC oxidation catalyst
  • SCR selective reduction catalyst
  • the catalyst heating strategies are generally based on the use of auxiliary heating systems, such as electric resistances. for example.
  • Document EP1382475 thus teaches the preheating of the catalyst by dedicated means before starting the heat engine.
  • the invention relates to a method for heating a catalyst associated with a heat engine belonging to a traction chain of a motor vehicle comprising:
  • a step of applying a negative resistive torque by the first electric traction motor so that the heat engine applies an opposite torque compensating for the resistive torque of the first electric traction motor to maintain its idling speed and increase a temperature of exhaust gas emitted by the heat engine in order to heat the catalyst.
  • the invention thus makes it possible, on a 4x4 hybrid architecture, to heat the catalyst using only the heat engine and the associated electric traction motor.
  • the invention therefore makes it possible to save on an additional heating element.
  • the gearbox is placed in neutral when the negative resistive torque is applied by the first electric traction motor.
  • the clutch is closed when the negative resistive torque is applied by the first electric traction motor.
  • the resistive torque is between -10 N.m and -50 N.m, and is preferably of the order of -30 N.m.
  • said method comprises a step of controlling an opening of the clutch and a tilting in a mode. electric 4x4 driving in which additional traction torque is provided by the first electric traction motor.
  • the catalyst is heated only by degraded operation of the heat engine.
  • a subject of the invention is also a computer comprising a memory storing software instructions for implementing the method for heating a catalyst as defined above.
  • the subject of the invention is also a motor vehicle comprising a traction chain comprising:
  • this vehicle comprising a computer as described above.
  • the first train is a front axle of the motor vehicle and the second train is a rear axle of the motor vehicle.
  • this vehicle comprises a battery, the first electric traction motor and the second electric traction motor being powered by this same battery.
  • the first electric traction motor and the second electric traction motor have a high operating voltage, in particular a voltage greater than 48 volts.
  • FIG. 1 is a schematic representation of a traction chain for a motor vehicle implementing a method according to the invention for heating a catalyst associated with a heat engine;
  • FIG. 2 is a diagram of the steps of the process according to the invention for heating a catalyst associated with a heat engine.
  • Figure 1 shows a traction chain 10 for a motor vehicle comprising a heat engine 11 and an electric traction motor 12 mounted on a train 13 of the motor vehicle, in particular a front axle.
  • the heat engine 11 is for example a heat engine with four cylinders. As a variant, the heat engine 11 could of course include a different number of cylinders, in particular three cylinders or more than four cylinders.
  • the heat engine 11 is associated with a catalyst 14 aimed at treating the polluting particles contained in the exhaust gases, in particular nitrogen oxides (Nox) and fine particles rich in hydrocarbons.
  • Nox nitrogen oxides
  • the heat engine 11 is coupled to a gearbox 15 via a clutch 16.
  • An output shaft of the gearbox 15 is connected to the wheels via a differential (not shown ).
  • the gearbox 15 is for example an automatic gearbox, in particular a planetary gearbox.
  • the electric traction motor 12 is arranged between the clutch 16 and the gearbox 15. In the open state, the clutch 16 allows the electric traction motor 12 to be isolated from the heat engine 11 when engine Electric 12 provides traction for the vehicle in an electric driving mode. The clutch 16 is closed in a thermal driving mode.
  • a second electric traction motor 18 is mounted on the rear axle 19 of the motor vehicle via a reduction gear 22 and a coupling and decoupling device 23 of the electric traction motor 18 with the rear axle 19.
  • the reducer 22 makes it possible to make the high speed of rotation of the electric traction motor 12 compatible with that of the wheels of the vehicle which is lower.
  • the coupling and decoupling device 23 may take an open state in which the electric traction motor 18 is uncoupled with respect to the rear axle 19 and a closed state in which the electric traction motor 18 is coupled with the rear axle 19.
  • the coupling and decoupling device 23 is preferably a dog clutch device.
  • the coupling and decoupling device 23 takes the form of a clutch.
  • a battery 24 is electrically connected to the electric traction motor 12 and to the electric traction motor 18.
  • the battery 24 is here common to the two electric traction motors 12, 18. Alternatively, a battery 24 associated with each is used. electric traction motor 12, 18.
  • the first electric traction motor 12 and the second electric traction motor 18 may have a high operating voltage, in particular a voltage greater than 48 volts.
  • An electric traction motor 12, 18 is able to transform electrical energy from battery 24 into mechanical energy to provide traction for the vehicle.
  • An electric traction motor 12, 18 is also able to operate in a generator mode in which the electric motor 12, 18 transforms mechanical energy into electrical energy making it possible to recharge the battery 24, in particular during a regenerative braking phase.
  • Such an architecture allows the vehicle to operate in a pure thermal mode, a hybrid propulsion mode, a pure electric propulsion mode, a hybrid 4x4 mode, and an electric 4x4 mode.
  • a computer 26 controls the various components of the traction chain 10.
  • This computer 26 includes a memory storing software instructions for implementing the method according to the invention for heating the catalyst 14.
  • steps 100 to 104 the motor vehicle operates in an electric driving mode by being towed by the electric motor of rear traction 18.
  • the coupling and decoupling device 23 therefore ensures coupling of the electric traction motor 18 with the rear axle 19.
  • a step 100 the computer 26 controls a starting of the heat engine 11 as well as its operation at its idle speed.
  • a step 101 the computer 26 controls a neutralization of the gearbox 15, so that the wheels of the front axle 13 cannot be driven by the traction members 11, 12 of the front axle 13.
  • a step 102 the computer 26 controls a closing of the clutch 16 disposed between the electric traction motor 12 and the heat engine 11.
  • a step 103 the computer 26 controls the electric traction motor 12 at the idle speed of the heat engine 11.
  • a negative resistive torque is applied by the electric traction motor 12, so that the heat engine 11 applies at least one opposite torque compensating for the negative resistive torque of the electric traction motor 12 to maintain its speed idle speed and increase the temperature of the exhaust gas emitted by the heat engine 11.
  • the negative resistive coupled applied by the electric traction motor 12 is between -10 Nm and -50 Nm, and is preferably of the order of -30 Nm By “of the order of” is meant a variation of plus or minus 10% around the target value.
  • the heat engine 11 provides an opposite torque at least equal to the opposite of the negative resistive torque, in particular of the order of 30 Nm in the preferred case, to maintain its idling speed.
  • Driving in electric mode by the rear axle 19 is maintained as long as the torque desired by the driver is guaranteed by the rear traction electric motor 18.
  • the computer 26 controls opening of the clutch 16 and switching to an electric 4x4 driving mode in which additional traction torque is supplied by the front traction electric motor 12.
  • the torque transmitted to the wheels becomes the sum of the front and rear torques delivered by the two electric traction motors 12 and 18.
  • the heating of the catalyst 14 is then only carried out by a degraded operation of the heat engine 11.
  • the architecture of the traction chain 10 can be reversed, that is to say that the electric traction motor 12 and the heat engine 11 can be mounted on the rear axle 19 of the motor vehicle, while the electric traction motor 18 as well as the reduction gear 22 and the coupling and decoupling device 23 may be mounted on the front axle 13 of the motor vehicle.

Abstract

The invention relates to a method for heating a catalyst (14) associated with a combustion engine (11) belonging to a powertrain (10), the method implemented when the motor vehicle is driven by the second electric traction motor (18) in an electric driving mode comprising: a step of operating the combustion engine (11) at its idle speed, a step of controlling the first electric traction motor (12) at the idle speed of the combustion engine (11), and a step of applying a resistive negative torque by the first electrical traction motor (12), such that the combustion engine (11) applies an opposite torque compensating the resistive negative torque of the first electric traction motor (12) in order to maintain its idle speed and to increase a temperature of the exhaust gas emitted by the combustion engine (11) in order to heat the catalyst.

Description

DESCRIPTION DESCRIPTION
TITRE : PROCEDE DE CHAUFFAGE D'UN CATALYSEUR DE MOTEUR THERMIQUE DANS UNE ARCHITECURE HYBRIDE TITLE: PROCESS FOR HEATING A THERMAL ENGINE CATALYST IN A HYBRID ARCHITECURE
[0001] La présente invention revendique la priorité de la demande française N° 1913123 déposée le 22.11.2019 dont le contenu (te<te, dessins et revendications) est ici incorporé par référence The present invention claims the priority of French application No. 1913123 filed on 11.22.2019, the content of which (te <te, drawings and claims) is incorporated here by reference
[0002] La présente invention porte sur un procédé de chauffage d'un catalyseur de moteur thermique dans une architecture hybride. L'invention trouve une application particulièrement avantageuse, mais non exclusive, pour une architecture hybride à deux moteurs électriques de traction. The present invention relates to a method of heating a heat engine catalyst in a hybrid architecture. The invention finds a particularly advantageous, but not exclusive, application for a hybrid architecture with two electric traction motors.
[0003] Le système de dépollution des gaz d’échappement d'un moteur thermique est basé sur l’utilisation d'un catalyseur dont la configuration varie en fonction de la motorisation. Pour les véhicules équipés d’un moteur thermique de type essence à injection directe, la dépollution est réalisée par un catalyseur, dit trois voies (ou TWC pour "Three Way catalytic Converter" en anglais) et un filtre à particules (ou GPF pour "Gasoline Particulate Filter" en anglais). Pour les véhicules de type diesel, la dépollution est réalisée par une série de catalyseurs, par exemple un catalyseur d’oxydation (DOC pour "Diesel Oxydation Catalyst" en anglais) associé à un catalyseur de réduction sélective (SCR pour "Sélective Catalytic Réduction" en anglais) et par un filtre à particules. [0003] The exhaust gas depollution system of a heat engine is based on the use of a catalyst whose configuration varies depending on the engine. For vehicles equipped with a direct injection gasoline-type thermal engine, pollution control is carried out by a catalyst, called three-way (or TWC for "Three Way catalytic Converter" in English) and a particulate filter (or GPF for " Gasoline Particulate Filter "in English). For diesel type vehicles, pollution control is carried out by a series of catalysts, for example an oxidation catalyst (DOC for "Diesel Oxidation Catalyst") associated with a selective reduction catalyst (SCR for "Selective Catalytic Reduction" in English) and by a particulate filter.
[0004] Ces catalyseurs nécessitent d’atteindre une certaine température, dite température d'amorçage, pour être efficaces. Cette montée en température, générée par la température des gaz d’échappement ou par un équipement extérieur (chauffage électrique), est plus ou moins rapide selon la technologie retenue pour le substrat du catalyseur ou les équipements extérieurs. [0004] These catalysts require reaching a certain temperature, called the initiation temperature, to be effective. This temperature rise, generated by the temperature of the exhaust gases or by external equipment (electric heating), is more or less rapid depending on the technology chosen for the catalyst substrate or the external equipment.
[0005] Les stratégies de chauffe du catalyseur sont généralement basées sur l'utilisation de systèmes annexes de chauffage, tels que des résistances électriques par exemple. Le document EP1382475 enseigne ainsi le préchauffage du catalyseur par des moyens dédiés avant le démarrage du moteur thermique. The catalyst heating strategies are generally based on the use of auxiliary heating systems, such as electric resistances. for example. Document EP1382475 thus teaches the preheating of the catalyst by dedicated means before starting the heat engine.
[0006] L'invention tire profit de la présence d'un moteur électrique de traction associé à un moteur thermique monté sur un train du véhicule pour effectuer la chauffe du catalyseur sans avoir à utiliser un élément chauffant additionnel The invention takes advantage of the presence of an electric traction motor associated with a heat engine mounted on a train of the vehicle to heat the catalyst without having to use an additional heating element
[0007] A cet effet, l'invention a pour objet un procédé de chauffage d'un catalyseur associé à un moteur thermique appartenant à une chaîne de traction d'un véhicule automobile comportant: [0007] To this end, the invention relates to a method for heating a catalyst associated with a heat engine belonging to a traction chain of a motor vehicle comprising:
- ledit moteur thermique, un premier moteur électrique de traction, un embrayage, et une boîte de vitesses montés sur un premier train du véhicule automobile,- said heat engine, a first electric traction motor, a clutch, and a gearbox mounted on a first train of the motor vehicle,
- un deuxième moteur électrique de traction monté sur un deuxième train du véhicule automobile, - a second electric traction motor mounted on a second train of the motor vehicle,
- alors que le véhicule automobile est tracté par le deuxième moteur électrique de traction dans un mode de roulage électrique, ledit procédé comporte: - While the motor vehicle is towed by the second electric traction motor in an electric driving mode, said method comprises:
- une étape de mise en fonctionnement du moteur thermique à son régime de ralenti,- a step of starting the heat engine at its idle speed,
- une étape de pilotage du premier moteur électrique de traction au régime de ralenti du moteur thermique, et - a step of controlling the first electric traction motor at idle speed of the heat engine, and
- une étape d'application d'un couple résistif négatif par le premier moteur électrique de traction, de sorte que le moteur thermique applique un couple opposé compensant le couple résistif du premier moteur électrique de traction pour maintenir son régime de ralenti et augmenter une température de gaz d'échappement émis par le moteur thermique afin de chauffer le catalyseur. a step of applying a negative resistive torque by the first electric traction motor, so that the heat engine applies an opposite torque compensating for the resistive torque of the first electric traction motor to maintain its idling speed and increase a temperature of exhaust gas emitted by the heat engine in order to heat the catalyst.
[0008] L'invention permet ainsi, sur une architecture hybride 4x4, d'assurer la chauffe du catalyseur en utilisant uniquement le moteur thermique et le moteur électrique de traction associé. L'invention permet donc de faire l'économie d'un élément chauffant additionnel. [0008] The invention thus makes it possible, on a 4x4 hybrid architecture, to heat the catalyst using only the heat engine and the associated electric traction motor. The invention therefore makes it possible to save on an additional heating element.
[0009] Selon une mise en oeuvre, la boîte de vitesses est placée au neutre lorsque le couple résistif négatif est appliqué par le premier moteur électrique de traction. [0010] Selon une mise en oeuvre, l'embrayage est fermé lorsque le couple résistif négatif est appliqué par le premier moteur électrique de traction. [0009] According to one implementation, the gearbox is placed in neutral when the negative resistive torque is applied by the first electric traction motor. [0010] According to one implementation, the clutch is closed when the negative resistive torque is applied by the first electric traction motor.
[0011] Selon une mise en oeuvre, le couple résistif est compris entre -10 N.m et -50 N.m, et vaut de préférence de l'ordre de -30 N.m. According to one implementation, the resistive torque is between -10 N.m and -50 N.m, and is preferably of the order of -30 N.m.
[0012] Selon une mise en oeuvre, dans le cas où un couple souhaité ne peut plus être garanti par le deuxième moteur électrique de traction, ledit procédé comporte une étape de commande d'une ouverture de l’embrayage et un basculement dans un mode de roulage 4x4 électrique dans lequel un complément de couple de traction est fourni par le premier moteur électrique de traction. [0012] According to one implementation, in the case where a desired torque can no longer be guaranteed by the second electric traction motor, said method comprises a step of controlling an opening of the clutch and a tilting in a mode. electric 4x4 driving in which additional traction torque is provided by the first electric traction motor.
[0013] Dans ce mode de roulage 4x4 électrique, une chauffe du catalyseur est effectuée uniquement par un fonctionnement dégradé du moteur thermique. In this electric 4x4 driving mode, the catalyst is heated only by degraded operation of the heat engine.
[0014] L'invention a également pour objet un calculateur comportant une mémoire stockant des instructions logicielles pour la mise en oeuvre du procédé de chauffage d'un catalyseur tel que précédemment défini. [0014] A subject of the invention is also a computer comprising a memory storing software instructions for implementing the method for heating a catalyst as defined above.
[0015] L’invention a également pour objet un véhicule automobile comprenant une chaîne de traction comprenant : [0015] The subject of the invention is also a motor vehicle comprising a traction chain comprising:
- un premier train, - a first train,
- un deuxième train, - a second train,
- un moteur thermique, un catalyseur associé au moteur thermique, un premier moteur électrique de traction, un embrayage, et une boîte de vitesses montés sur le premier train, - a heat engine, a catalyst associated with the heat engine, a first electric traction motor, a clutch, and a gearbox mounted on the first train,
- un deuxième moteur électrique de traction monté sur le deuxième train, ce véhicule comprenant un calculateur tel que précédemment décrit. a second electric traction motor mounted on the second train, this vehicle comprising a computer as described above.
[0016] Selon une mise en oeuvre, le premier train est un train avant du véhicule automobile et le deuxième train est un train arrière du véhicule automobile. [0016] According to one implementation, the first train is a front axle of the motor vehicle and the second train is a rear axle of the motor vehicle.
[0017] Selon une mise en oeuvre, ce véhicule comprend une batterie, le premier moteur électrique de traction et le deuxième moteur électrique de traction étant alimentés par cette même batterie. [0018] Selon une mise en oeuvre, le premier moteur électrique de traction et le deuxième moteur électrique de traction présentent une haute tension de fonctionnement, notamment une tension supérieure à 48 Volts. [0017] According to one implementation, this vehicle comprises a battery, the first electric traction motor and the second electric traction motor being powered by this same battery. According to one implementation, the first electric traction motor and the second electric traction motor have a high operating voltage, in particular a voltage greater than 48 volts.
[0019] 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 following description and on examining the accompanying figures. These figures are given only by way of illustration but in no way limit the invention.
[0020] [Fig. 1] La figure 1 est une représentation schématique d'une chaîne de traction pour véhicule automobile mettant en oeuvre un procédé selon l'invention de chauffe d'un catalyseur associé à un moteur thermique; [0020] [Fig. 1] FIG. 1 is a schematic representation of a traction chain for a motor vehicle implementing a method according to the invention for heating a catalyst associated with a heat engine;
[0021] [Fig. 2] La figure 2 est un diagramme des étapes du procédé selon l'invention de chauffe d'un catalyseur associé à un moteur thermique. [0021] [Fig. 2] FIG. 2 is a diagram of the steps of the process according to the invention for heating a catalyst associated with a heat engine.
[0022] Plus précisément, la figure 1 montre une chaîne de traction 10 pour un véhicule automobile comportant un moteur thermique 11 et un moteur électrique de traction 12 montés sur un train 13 du véhicule automobile, notamment un train avant. Le moteur thermique 11 est par exemple un moteur thermique à quatre cylindres. En variante, le moteur thermique 11 pourra bien entendu comporter un nombre différent de cylindres, notamment trois cylindres ou plus de quatre cylindres. Le moteur thermique 11 est associé à un catalyseur 14 visant à traiter les particules polluantes contenues dans les gaz d'échappement, notamment les oxydes d'azote (Nox) et les particules fines riches en hydrocarbures. More specifically, Figure 1 shows a traction chain 10 for a motor vehicle comprising a heat engine 11 and an electric traction motor 12 mounted on a train 13 of the motor vehicle, in particular a front axle. The heat engine 11 is for example a heat engine with four cylinders. As a variant, the heat engine 11 could of course include a different number of cylinders, in particular three cylinders or more than four cylinders. The heat engine 11 is associated with a catalyst 14 aimed at treating the polluting particles contained in the exhaust gases, in particular nitrogen oxides (Nox) and fine particles rich in hydrocarbons.
[0023] Le moteur thermique 11 est accouplé à une boîte de vitesses 15 par l'intermédiaire d'un embrayage 16. Un arbre de sortie de la boîte de vitesses 15 est connecté aux roues par l'intermédiaire d'un différentiel (non représenté). La boîte de vitesses 15 est par exemple une boîte de vitesses automatique, notamment une boîte de vitesses à trains épicycloïdaux. The heat engine 11 is coupled to a gearbox 15 via a clutch 16. An output shaft of the gearbox 15 is connected to the wheels via a differential (not shown ). The gearbox 15 is for example an automatic gearbox, in particular a planetary gearbox.
[0024] Le moteur électrique de traction 12 est disposé entre l'embrayage 16 et la boîte de vitesses 15. A l'état ouvert, l'embrayage 16 permet d'isoler le moteur électrique de traction 12 par rapport au moteur thermique 11 lorsque le moteur électrique 12 assure une traction du véhicule dans un mode de roulage électrique. L'embrayage 16 est fermé dans un mode de roulage thermique. The electric traction motor 12 is arranged between the clutch 16 and the gearbox 15. In the open state, the clutch 16 allows the electric traction motor 12 to be isolated from the heat engine 11 when engine Electric 12 provides traction for the vehicle in an electric driving mode. The clutch 16 is closed in a thermal driving mode.
[0025] Un deuxième moteur électrique de traction 18 est monté sur le train arrière 19 du véhicule automobile par l'intermédiaire d'un réducteur 22 et d'un dispositif de couplage et de découplage 23 du moteur électrique de traction 18 avec le train arrière 19. A second electric traction motor 18 is mounted on the rear axle 19 of the motor vehicle via a reduction gear 22 and a coupling and decoupling device 23 of the electric traction motor 18 with the rear axle 19.
[0026] Le réducteur 22 permet de rendre compatible la vitesse de rotation élevée du moteur électrique de traction 12 avec celle des roues du véhicule qui est moins élevée. The reducer 22 makes it possible to make the high speed of rotation of the electric traction motor 12 compatible with that of the wheels of the vehicle which is lower.
[0027] Le dispositif de couplage et de découplage 23 pourra prendre un état ouvert dans lequel le moteur électrique de traction 18 est désaccouplé par rapport au train arrière 19 et un état fermé dans lequel le moteur électrique de traction 18 est accouplé avec le train arrière 19. Le dispositif de couplage et de découplage 23 est de préférence un dispositif à crabot. En variante, le dispositif de couplage et de découplage 23 prend la forme d'un embrayage. The coupling and decoupling device 23 may take an open state in which the electric traction motor 18 is uncoupled with respect to the rear axle 19 and a closed state in which the electric traction motor 18 is coupled with the rear axle 19. The coupling and decoupling device 23 is preferably a dog clutch device. As a variant, the coupling and decoupling device 23 takes the form of a clutch.
[0028] Une batterie 24 est reliée électriquement au moteur électrique de traction 12 et au moteur électrique de traction 18. La batterie 24 est ici commune aux deux moteurs électriques de traction 12, 18. En variante, on utilise une batterie 24 associée à chaque moteur électrique de traction 12, 18. A battery 24 is electrically connected to the electric traction motor 12 and to the electric traction motor 18. The battery 24 is here common to the two electric traction motors 12, 18. Alternatively, a battery 24 associated with each is used. electric traction motor 12, 18.
[0029] Le premier moteur électrique de traction 12 et le deuxième moteur électrique de traction 18 pourront présenter une haute tension de fonctionnement, notamment une tension supérieure à 48 Volts. The first electric traction motor 12 and the second electric traction motor 18 may have a high operating voltage, in particular a voltage greater than 48 volts.
[0030] Un moteur électrique de traction 12, 18 est apte à transformer une énergie électrique issue de la batterie 24 en une énergie mécanique pour assurer une traction du véhicule. Un moteur électrique de traction 12, 18 est également apte à fonctionner dans un mode générateur dans lequel le moteur électrique 12, 18 transforme une énergie mécanique en une énergie électrique permettant de recharger la batterie 24, notamment lors d'une phase de freinage récupératif. [0031] Une telle architecture permet au véhicule de fonctionner dans un mode thermique pur, un mode de propulsion hybride, un mode de propulsion électrique pur, un mode 4x4 hybride, et un mode 4x4 électrique. An electric traction motor 12, 18 is able to transform electrical energy from battery 24 into mechanical energy to provide traction for the vehicle. An electric traction motor 12, 18 is also able to operate in a generator mode in which the electric motor 12, 18 transforms mechanical energy into electrical energy making it possible to recharge the battery 24, in particular during a regenerative braking phase. Such an architecture allows the vehicle to operate in a pure thermal mode, a hybrid propulsion mode, a pure electric propulsion mode, a hybrid 4x4 mode, and an electric 4x4 mode.
[0032] Un calculateur 26 assure le pilotage des différents composants de la chaîne de traction 10. Ce calculateur 26 comporte une mémoire stockant des instructions logicielles pour la mise en oeuvre du procédé selon l'invention de chauffage du catalyseur 14. A computer 26 controls the various components of the traction chain 10. This computer 26 includes a memory storing software instructions for implementing the method according to the invention for heating the catalyst 14.
[0033] Les différentes étapes du procédé selon l'invention sont décrites ci-après en référence avec la figure 2. Au cours des étapes 100 à 104, le véhicule automobile fonctionne dans un mode de roulage électrique en étant tracté par le moteur électrique de traction arrière 18. Pendant cette phase, le dispositif de couplage et de découplage 23 assure donc un couplage du moteur électrique de traction 18 avec le train arrière 19. The different steps of the method according to the invention are described below with reference to Figure 2. During steps 100 to 104, the motor vehicle operates in an electric driving mode by being towed by the electric motor of rear traction 18. During this phase, the coupling and decoupling device 23 therefore ensures coupling of the electric traction motor 18 with the rear axle 19.
[0034] Dans une étape 100, le calculateur 26 commande un démarrage du moteur thermique 11 ainsi que sa mise en fonctionnement à son régime de ralenti. In a step 100, the computer 26 controls a starting of the heat engine 11 as well as its operation at its idle speed.
[0035] Dans une étape 101 , le calculateur 26 commande une mise au neutre de la boîte de vitesses 15, de sorte que les roues du train avant 13 ne peuvent pas être entraînées par les organes de traction 11, 12 du train avant 13. In a step 101, the computer 26 controls a neutralization of the gearbox 15, so that the wheels of the front axle 13 cannot be driven by the traction members 11, 12 of the front axle 13.
[0036] Dans une étape 102, le calculateur 26 pilote une fermeture de l’embrayage 16 disposé entre le moteur électrique de traction 12 et le moteur thermique 11. In a step 102, the computer 26 controls a closing of the clutch 16 disposed between the electric traction motor 12 and the heat engine 11.
[0037] Dans une étape 103, le calculateur 26 pilote le moteur électrique de traction 12 au régime de ralenti du moteur thermique 11. In a step 103, the computer 26 controls the electric traction motor 12 at the idle speed of the heat engine 11.
[0038] Dans une étape 104, un couple résistif négatif est appliqué par le moteur électrique de traction 12, de sorte que le moteur thermique 11 applique au moins un couple opposé compensant le couple résistif négatif du moteur électrique de traction 12 pour maintenir son régime de ralenti et augmenter une température de gaz d'échappement émis par le moteur thermique 11. Cela permet de chauffer le catalyseur 14. [0039] Le couplé résistif négatif appliqué par le moteur électrique de traction 12 est compris entre -10 N.m et -50 N.m, et vaut de préférence de l'ordre de -30 N.m. Par "de l'ordre de", on entend une variation de plus ou moins 10% autour de la valeur cible. Le moteur thermique 11 fournit un couple opposé au moins égal à l'opposé du couple résistif négatif, notamment de l'ordre de 30 N.m dans le cas préférentiel, pour maintenir son régime de ralenti. In a step 104, a negative resistive torque is applied by the electric traction motor 12, so that the heat engine 11 applies at least one opposite torque compensating for the negative resistive torque of the electric traction motor 12 to maintain its speed idle speed and increase the temperature of the exhaust gas emitted by the heat engine 11. This makes it possible to heat the catalyst 14. The negative resistive coupled applied by the electric traction motor 12 is between -10 Nm and -50 Nm, and is preferably of the order of -30 Nm By "of the order of" is meant a variation of plus or minus 10% around the target value. The heat engine 11 provides an opposite torque at least equal to the opposite of the negative resistive torque, in particular of the order of 30 Nm in the preferred case, to maintain its idling speed.
[0040] Le roulage en mode électrique par le train arrière 19 est maintenu tant que le couple souhaité par le conducteur est garanti par le moteur électrique de traction arrière 18. [0041] Dans le cas où le couple souhaité par le conducteur ne peut plus être garanti par le moteur électrique de traction arrière 18, alors le calculateur 26 commande une ouverture de l’embrayage 16 et un basculement dans un mode de roulage 4x4 électrique dans lequel un complément de couple de traction est fourni par le moteur électrique de traction avant 12. Autrement dit, le couple transmis aux roues devient la somme des couples avant et arrière délivrés par les deux moteurs électriques de traction 12 et 18. Driving in electric mode by the rear axle 19 is maintained as long as the torque desired by the driver is guaranteed by the rear traction electric motor 18. In the case where the torque desired by the driver can no longer be guaranteed by the rear traction electric motor 18, then the computer 26 controls opening of the clutch 16 and switching to an electric 4x4 driving mode in which additional traction torque is supplied by the front traction electric motor 12. In other words, the torque transmitted to the wheels becomes the sum of the front and rear torques delivered by the two electric traction motors 12 and 18.
[0042] La chauffe du catalyseur 14 est alors uniquement effectuée par un fonctionnement dégradé du moteur thermique 11. The heating of the catalyst 14 is then only carried out by a degraded operation of the heat engine 11.
[0043] En variante, l'architecture de la chaîne de traction 10 pourra être inversée, c’est-à-dire que le moteur électrique de traction 12 et le moteur thermique 11 pourront être montés sur le train arrière 19 du véhicule automobile, tandis que le moteur électrique de traction 18 ainsi que le réducteur 22 et le dispositif de couplage et de découplage 23 pourront être montés sur le train avant 13 du véhicule automobile. Alternatively, the architecture of the traction chain 10 can be reversed, that is to say that the electric traction motor 12 and the heat engine 11 can be mounted on the rear axle 19 of the motor vehicle, while the electric traction motor 18 as well as the reduction gear 22 and the coupling and decoupling device 23 may be mounted on the front axle 13 of the motor vehicle.

Claims

REVENDICATIONS
1. Procédé de chauffage d'un catalyseur (14) associé à un moteur thermique (11 ) appartenant à une chaîne de traction (10) d'un véhicule automobile comportant: - ledit moteur thermique (11 ), un premier moteur électrique de traction (12), un embrayage (16), et une boîte de vitesses (15) montés sur un premier train (13) du véhicule automobile, 1. A method of heating a catalyst (14) associated with a heat engine (11) belonging to a traction chain (10) of a motor vehicle comprising: - said heat engine (11), a first electric traction motor (12), a clutch (16), and a gearbox (15) mounted on a first train (13) of the motor vehicle,
- un deuxième moteur électrique de traction (18) monté sur un deuxième train (19) du véhicule automobile, caractérisé en ce que, alors que le véhicule automobile est tracté par le deuxième moteur électrique de traction (18) dans un mode de roulage électrique, ledit procédé comporte: - a second electric traction motor (18) mounted on a second train (19) of the motor vehicle, characterized in that, while the motor vehicle is towed by the second electric traction motor (18) in an electric driving mode , said method comprises:
- une étape de mise en fonctionnement du moteur thermique (11 ) à son régime de ralenti, - une étape de pilotage du premier moteur électrique de traction (12) au régime de ralenti du moteur thermique (11 ), et - a step of operating the heat engine (11) at its idle speed, - a step of controlling the first electric traction motor (12) at the idle speed of the heat engine (11), and
- une étape d'application d'un couple résistif négatif par le premier moteur électrique de traction (12), de sorte que le moteur thermique (11) applique un couple opposé compensant le couple résistif négatif du premier moteur électrique de traction (12) pour maintenir son régime de ralenti et augmenter une température de gaz d'échappement émis par le moteur thermique (11) afin de chauffer le catalyseur (14). - a step of applying a negative resistive torque by the first electric traction motor (12), so that the heat engine (11) applies an opposite torque compensating for the negative resistive torque of the first electric traction motor (12) to maintain its idling speed and increase a temperature of the exhaust gas emitted by the heat engine (11) in order to heat the catalyst (14).
2. Procédé selon la revendication 1 , caractérisé en ce que la boîte de vitesses (15) est placée au neutre lorsque le couple résistif négatif est appliqué par le premier moteur électrique de traction (12). 2. Method according to claim 1, characterized in that the gearbox (15) is placed in neutral when the negative resistive torque is applied by the first electric traction motor (12).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'embrayage (16) est fermé lorsque le couple résistif négatif est appliqué par le premier moteur électrique de traction (12). 3. Method according to claim 1 or 2, characterized in that the clutch (16) is closed when the negative resistive torque is applied by the first electric traction motor (12).
4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le couple résistif négatif est compris entre -10 N.m et -50 N.m, et vaut de préférence de l'ordre de -30 N.m. 4. Method according to any one of claims 1 to 3, characterized in that the negative resistive torque is between -10 N.m and -50 N.m, and is preferably of the order of -30 N.m.
5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que dans le cas où un couple souhaité ne peut plus être garanti par le deuxième moteur électrique de traction (18), ledit procédé comporte une étape de commande d'une ouverture de l’embrayage (16) et un basculement dans un mode de roulage 4x4 électrique dans lequel un complément de couple de traction est fourni par le premier moteur électrique de traction (12). 5. Method according to any one of claims 1 to 4, characterized in that in the case where a desired torque can no longer be guaranteed by the second electric traction motor (18), said method comprises a control step of an opening of the clutch (16) and a switch to an electric 4x4 driving mode in which additional traction torque is provided by the first electric traction motor (12).
6. Procédé selon la revendication 5, caractérisé en ce qu'une chauffe du catalyseur (14) est effectuée uniquement par un fonctionnement dégradé du moteur thermique (11). 6. Method according to claim 5, characterized in that a heating of the catalyst (14) is performed only by degraded operation of the heat engine (11).
7. Calculateur (26) comportant une mémoire stockant des instructions logicielles pour la mise en oeuvre du procédé de chauffage d'un catalyseur tel que défini selon l’une quelconque des revendications précédentes. 7. Computer (26) comprising a memory storing software instructions for implementing the process for heating a catalyst as defined in any one of the preceding claims.
8. Véhicule automobile comprenant une chaîne de traction (10) comprenant : 8. Motor vehicle comprising a traction chain (10) comprising:
- un premier train (13), - a first train (13),
- un deuxième train (19), - a second train (19),
- un moteur thermique (11 ), un catalyseur (14) associé au moteur thermique (11 ), un premier moteur électrique de traction (12), un embrayage (16), et une boîte de vitesses (15) montés sur le premier train (13), - a heat engine (11), a catalyst (14) associated with the heat engine (11), a first electric traction motor (12), a clutch (16), and a gearbox (15) mounted on the first train (13),
- un deuxième moteur électrique de traction (18) monté sur le deuxième train (19), caractérisé en ce que ce véhicule comprend un calculateur (26) selon la revendication 7. - a second electric traction motor (18) mounted on the second train (19), characterized in that this vehicle comprises a computer (26) according to claim 7.
9. Véhicule selon la revendication 8, caractérisé en ce que le premier train (13) est un train avant du véhicule automobile et le deuxième train (18) est un train arrière (19) du véhicule automobile. 9. Vehicle according to claim 8, characterized in that the first train (13) is a front axle of the motor vehicle and the second train (18) is a rear axle (19) of the motor vehicle.
10. Véhicule selon l'une quelconque des revendications 8 et 9 comprenant une batterie (24), caractérisé en ce que le premier moteur électrique de traction (12) et le deuxième moteur électrique de traction (18) sont alimentés par cette même batterie (24). 10. Vehicle according to any one of claims 8 and 9 comprising a battery (24), characterized in that the first electric traction motor (12) and the second electric traction motor (18) are supplied by this same battery ( 24).
11. Véhicule selon l'une quelconque des revendications 8 à 10, caractérisé en ce que le premier moteur électrique de traction (12) et le deuxième moteur électrique de traction (18) présentent une haute tension de fonctionnement. 11. Vehicle according to any one of claims 8 to 10, characterized in that the first electric traction motor (12) and the second electric traction motor (18) have a high operating voltage.
PCT/FR2020/051832 2019-11-22 2020-10-15 Method for heating a combustion engine catalyst in a hybrid architecture WO2021099702A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FRFR1913123 2019-11-22
FR1913123A FR3103414B1 (en) 2019-11-22 2019-11-22 METHOD FOR HEATING A THERMAL ENGINE CATALYST IN A HYBRID ARCHITECURE

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316694A1 (en) * 2001-11-30 2003-06-04 Ford Global Technologies, Inc. A method and arrangement for maintaining an exhaust gas catalyst in an effective state
EP1382475A1 (en) 2002-07-19 2004-01-21 Toyota Jidosha Kabushiki Kaisha Hybrid vehicle and method in which the engine is preheated before start
FR2947789A1 (en) * 2009-07-13 2011-01-14 Bosch Gmbh Robert Hybrid vehicle managing method, involves operating internal combustion engine with predefined load to heat catalyst for cold-starting of engine, and assisting electric motor for driving hybrid vehicle
FR3065920A1 (en) * 2017-05-04 2018-11-09 Valeo Equipements Electriques Moteur TENSION ARCHITECTURE FOR A MOTOR VEHICLE COMPRISING TWO REVERSIBLE ROTATING ELECTRIC MACHINES
US20190118793A1 (en) * 2017-10-25 2019-04-25 Hyundai Motor Company System and method of controlling vehicle in cold start

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1316694A1 (en) * 2001-11-30 2003-06-04 Ford Global Technologies, Inc. A method and arrangement for maintaining an exhaust gas catalyst in an effective state
EP1382475A1 (en) 2002-07-19 2004-01-21 Toyota Jidosha Kabushiki Kaisha Hybrid vehicle and method in which the engine is preheated before start
FR2947789A1 (en) * 2009-07-13 2011-01-14 Bosch Gmbh Robert Hybrid vehicle managing method, involves operating internal combustion engine with predefined load to heat catalyst for cold-starting of engine, and assisting electric motor for driving hybrid vehicle
FR3065920A1 (en) * 2017-05-04 2018-11-09 Valeo Equipements Electriques Moteur TENSION ARCHITECTURE FOR A MOTOR VEHICLE COMPRISING TWO REVERSIBLE ROTATING ELECTRIC MACHINES
US20190118793A1 (en) * 2017-10-25 2019-04-25 Hyundai Motor Company System and method of controlling vehicle in cold start

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