EP4323217A1 - Procédé de fonctionnement d'un groupe motopropulseur - Google Patents
Procédé de fonctionnement d'un groupe motopropulseurInfo
- Publication number
- EP4323217A1 EP4323217A1 EP22717386.1A EP22717386A EP4323217A1 EP 4323217 A1 EP4323217 A1 EP 4323217A1 EP 22717386 A EP22717386 A EP 22717386A EP 4323217 A1 EP4323217 A1 EP 4323217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion engine
- internal combustion
- powertrain
- storage device
- operating
- 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- Withdrawn
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
- 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 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 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/46—Series 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
- 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- 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
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
-
- 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
- the technical field of the present invention is that of series hybrid type powertrains for a motor vehicle.
- the present invention relates to a method of operating such a powertrain of a motor vehicle and more particularly to the particular operation of an internal combustion engine within this powertrain.
- Series-hybrid powertrains typically include an internal combustion engine supplied with fuel from a fuel injection device and an electric motor supplied with electrical energy from an electrical storage device.
- the electric motor exclusively moves the motor vehicle by driving the wheels of the latter.
- the internal combustion engine is then started in generator mode in order to extend the range of the vehicle (we speak of a "range extender" in English) allowing on the one hand, to continue to supply the electric motor in order to continue driving the wheels, and allowing on the other hand, possibly to recharge the electric storage device.
- a problem with such powertrains as they have just been described lies in particular in that the starting of the internal combustion engine and its revving up to an optimum operating point consumes fuel and therefore releases a quantity significant amount of pollutants.
- the transient operation of the internal combustion engine when it is started is more expensive in terms of fuel and generates more pollutants than when the internal combustion engine operates in a steady state.
- the object of the present invention is therefore to overcome the aforementioned problem by developing a method of operating the powertrain making it possible to limit the quantity of pollutants emitted by the internal combustion engine, on the one hand by anticipating the loading requirements of the electrical storage, and on the other hand, by allowing the electric motor to bring the internal combustion engine directly to its point of optimal operation when the latter needs to be started.
- the anticipation of the energy needs of the electrical storage device makes it possible to anticipate the operation of the internal combustion engine, by placing it in optimal conditions in which the internal combustion engine in operation generates the least possible pollutants.
- the invention therefore relates to a method of operating a powertrain of a motor vehicle, the powertrain comprising at least one internal combustion engine, a device for injecting fuel into the internal combustion engine, a electric current generator driven in rotation by the internal combustion engine and capable of recharging an electric storage device constituting the powertrain, the latter also comprising an electric motor intended to be powered by the electric storage device, the method comprising at least a first stage during which the generator brings the internal combustion engine to a predefined operating point and a second stage during which the injection device injects fuel into the internal combustion engine for its operation.
- the electric motor exclusively drives the wheels of the motor vehicle, thus allowing it to move.
- the electric motor is supplied with electrical energy by the electrical storage device which itself is charged with electrical energy by the generator.
- the first step and the second step are performed when a state of charge of the storage device is at least equal to or less than a minimum charge threshold.
- the method of operation ensures the starting of the internal combustion engine .
- the generator ensures that the internal combustion engine revs up to its operating point. This makes it possible to reduce the quantity of pollutants generated by the operation of the internal combustion engine, in particular in transient state.
- the electrical storage device has an insufficient state of charge, being equal to or less than the minimum charge threshold, and can ultimately limit the supply of electrical energy to the electric motor and thus limit the movement of the motor vehicle. It is therefore understood that the method of operation of the powertrain makes it possible at least in part to anticipate a state of zero charge of the electrical storage device.
- the internal combustion engine drives the generator in rotation, the generator ensuring the charging of the electrical storage device at least during this second stage.
- the generator has an interface role between the internal combustion engine and the electric storage device, the internal combustion engine driving the generator by a mechanical transmission and the generator transforming the mechanical energy into electrical energy for of the electrical storage device.
- the predefined operating point of the internal combustion engine corresponds to operation at maximum efficiency of the internal combustion engine at plus or minus 5%.
- the predefined operating point of the internal combustion engine is a speed of rotation of said internal combustion engine of between 2500 and 3500 revolutions per minute.
- This ideal speed of rotation naturally depends on the design of the internal combustion engine, its number of cylinders, its displacement, its average compression ratio, and in general on the intrinsic parameters of this internal combustion engine.
- the speed of rotation of between 2500 and 3500 revolutions per minute is suitable for a three or four cylinder internal combustion engine, preferably three cylinders, with a displacement of between 900 and 1100 cm 3 .
- the method comprises at least a third step of stopping the internal combustion engine during which the generator brings the internal combustion engine to a stop state.
- the injection device interrupts the injection of fuel into the internal combustion engine.
- the third step of the process puts an end to the use of the internal combustion engine within the powertrain.
- the internal combustion engine no longer drives the generator, and the latter no longer recharges the storage device with electrical energy. This ensures a drop in the speed of the internal combustion engine from its predefined operating point to a speed of zero revolutions without the emission of pollutants.
- the third step is performed when the state of charge of the storage device is greater than an intermediate charge threshold.
- the intermediate charge threshold of the storage device is distinct from the minimum charge threshold.
- the intermediate charge threshold is between the minimum charge threshold and a maximum charge threshold of the electrical storage device, said maximum charge threshold corresponding to a state of charge at 100% of said storage device.
- the intermediate charge threshold is therefore also distinct from the maximum charge threshold of the storage device.
- the internal combustion engine operates only in a steady state. Such operation of the internal combustion engine makes it possible to prevent the generation of pollutants which could be emitted during transient operation of said internal combustion engine. It is understood from the preceding characteristics that the generator replaces the transient regimes of the internal combustion engine.
- the injection device injects fuel at a richness of one.
- Richness one fuel injection corresponds to optimum fuel richness for engine operation. Such injection of fuel into the internal combustion engine makes it possible to reduce the quantity of pollutants which result from the operation of the internal combustion engine in steady state.
- the invention also relates to a powertrain of a motor vehicle comprising at least one internal combustion engine, a device for injecting fuel into the internal combustion engine, a generator, an electric motor and a storage device electric intended to power the electric motor, the powertrain being able to implement the method of operation according to any one of the preceding steps.
- the electric motor Only the electric motor is configured to set the vehicle in motion, the internal combustion engine being used only when the electric storage device which supplies electric energy to the electric motor has electrical energy recharging needs, in particular when it reaches the minimum load threshold.
- the electrical storage device forms an integral part of the powertrain in the sense that it makes it possible to supply the electrical energy necessary for the electric motor so that the latter drives the wheels of the motor vehicle in rotation.
- the invention also relates to a motor vehicle comprising at least one powertrain according to the preceding characteristic.
- FIG 1 is a general view of a motor vehicle comprising a powertrain according to the invention
- FIG 2 is a diagram of the powertrain of Figure 1, capable of implementing the method of operation according to the invention
- FIG 3 is a flowchart illustrating various steps in the method of operation of the power unit of Figure 2.
- FIG. 1 illustrates a motor vehicle 1 comprising a body 3 carried by a plurality of wheels 2 and a powertrain 4.
- the wheels 2 of the motor vehicle 1 participate in particular in the movement of the latter on a traffic lane under the action of the power unit powertrain 4.
- the powertrain 4, particularly visible in Figure 2 comprises at least one internal combustion engine 6, a device 8 for injecting fuel into the internal combustion engine 6, an electric motor 10, a device electrical storage 12 and a generator 14.
- the operation of the powertrain 4 will be described in the rest of the detailed description based on FIG. 2 and on FIG. 3.
- the drive of the wheels 2 of the motor vehicle is ensured exclusively by the electric motor 10.
- the electrical storage device 12 supplies the electric motor 10 with electrical energy so that the latter drives the wheels 2 of the motor vehicle in rotation.
- a state of charge 30 of the electrical storage device 12 is then defined, this state of charge 30 being representative of the quantity of electrical energy present in the electrical storage device 12 at a given instant.
- a minimum charge threshold of the electric storage device 12 is defined, corresponding to a threshold below which it is estimated that said electric storage device 12 needs to be recharged. In other words, the minimum load threshold makes it possible to anticipate the loading requirements of the storage device 12.
- the state of charge 30 of the electric storage device 12 is greater than the minimum load threshold 40, and that thus, only the electric motor 10 is in working order.
- the latter emits a zero quantity of pollutants, due to the exclusive use of the electric motor 10 within the powertrain 4, the internal combustion engine 6 being in the state of 'stop.
- the minimum load threshold corresponds to an anticipation threshold of the electrical capacities of the electrical storage device 12, this anticipation making it possible to modify the operation of the powertrain 4 prior to any electrical failure, in particular by operating the heat engine 6-generator 14 pair.
- the operating method of the powertrain 2 comprises at least a first step 100 during which the generator 14 brings the internal combustion engine 6 at a predefined operating point.
- the predefined operating point corresponds to a speed of rotation of the internal combustion engine 6 which produces the most energy while producing the least amount of pollutants possible. It is then understood that the predefined operating point corresponds to operation of the internal combustion engine 6 at maximum efficiency, at plus or minus 5%. More precisely, the predefined operating point corresponds to a speed of rotation of the internal combustion engine 6 comprised between 2500 and 3500 revolutions per minute, for an internal combustion engine comprising three cylinders and a displacement comprised between 900 and 1100 cm 3 .
- the function of the generator 14 during the first step 100 is to ensure the rise in speed of the internal combustion engine 6 up to its predefined operating point, corresponding to operation in steady state.
- Advantage is taken of this first step 100 in that the release of pollutants usually generated during the transitional phase corresponding to an autonomous rise in speed of the internal combustion engine 6 is limited.
- a second step 200 of the method corresponds to the injection of fuel into the internal combustion engine 6 by the injection device 8.
- This second step 200 ensures the operation of the combustion engine internal combustion engine 6. Although not detailed here, this operation is accompanied by an activation of an ignition system of the internal combustion engine 6.
- the injection device 8 injects fuel into the internal combustion engine 6 at a richness one, corresponding to an optimum ratio between oxidant and fuel for the engine speed corresponding to the predefined operating point of the internal combustion engine. 6.
- This fuel injection in richness one in the engine internal combustion engine 6 therefore participates in limiting the quantity of pollutants generated by its operation.
- the internal combustion engine 6 is used within the powertrain only in steady state. This makes it possible to reduce the quantity of pollutants generated, compared to a conventional use of the internal combustion engine 6 comprising use in transient regimes and in stationary regime.
- the latter is able to rotate at least a part of the generator 14 of the powertrain 4.
- the function of the generator 14 is to ensure the electrical charging of the electrical storage device 12 of the powertrain 4.
- the generator 14 converts mechanical energy received from the internal combustion engine 6 into electrical energy sent to the electrical storage device 12 .
- the internal combustion engine 6 provides the mechanical energy loading of the generator 14.
- the generator 14 then provides the electrical charging of the electrical storage device 12 such that the state of charge of this last passes from its minimum threshold to an intermediate load threshold 60.
- the intermediate load threshold 60 is therefore distinct from the minimum load threshold.
- the intermediate charge threshold 60 is defined as a state of charge of the electrical storage device 12 comprised between its minimum charge threshold and a maximum charge threshold.
- the maximum charge threshold then corresponds to a state of charge in which the charge of the electrical storage device 12 is substantially equal to 100%.
- the intermediate state of charge corresponds to a state of charge of the electrical storage device 12 which guarantees a minimum acceptable distance (for example, fifty kilometers) that the vehicle can achieve with its electric motor.
- the intermediate charge threshold 60 corresponds to a state of charge of the electrical storage device 12 substantially equal, for example, to 90% of its maximum charge threshold. It is then understood that when the intermediate load threshold 60 is reached by the electrical storage device 12, the generator 14 no longer needs to charge said electrical storage device 12 with electrical energy. Thus, when the state of charge of the electric storage device 12 is greater than the intermediate load threshold 60, the powertrain 4 implements an intermediate step 250 during which the injection device 8 interrupts the injection of fuel in the internal combustion engine 6.
- a third step 300 of the method subsequent to the intermediate step 250, the generator 14 brings the internal combustion engine 6 to a stop state.
- Stopped state means the fact that the internal combustion engine 6 is at a rotational speed equal to zero. It is therefore understood that the third step also corresponds to the stopping of the mechanical energy load of the generator 14 by the internal combustion engine 6. This ensures a drop in the speed of the internal combustion engine from its predefined operating point to at a speed of zero revolutions per minute without emission of pollutants.
- the powertrain 4 will be able to again perform steps one to three of the method of operation such as it has just been described.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2103830A FR3121897B1 (fr) | 2021-04-14 | 2021-04-14 | Procédé de fonctionnement d’un groupe motopropulseur |
| PCT/EP2022/057544 WO2022218660A1 (fr) | 2021-04-14 | 2022-03-22 | Procédé de fonctionnement d'un groupe motopropulseur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4323217A1 true EP4323217A1 (fr) | 2024-02-21 |
Family
ID=76601337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22717386.1A Withdrawn EP4323217A1 (fr) | 2021-04-14 | 2022-03-22 | Procédé de fonctionnement d'un groupe motopropulseur |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4323217A1 (fr) |
| FR (1) | FR3121897B1 (fr) |
| WO (1) | WO2022218660A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532325C2 (de) * | 1995-09-01 | 2001-07-19 | Daimler Chrysler Ag | Verfahren zum Betrieb eines Serienhybridantriebs |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3347080B2 (ja) * | 1998-12-18 | 2002-11-20 | 本田技研工業株式会社 | ハイブリッド車の始動判定装置 |
| JP5957873B2 (ja) * | 2011-12-21 | 2016-07-27 | スズキ株式会社 | エンジン始動制御装置 |
| JP5923142B2 (ja) * | 2014-07-28 | 2016-05-24 | 富士重工業株式会社 | 車両用制御装置 |
-
2021
- 2021-04-14 FR FR2103830A patent/FR3121897B1/fr active Active
-
2022
- 2022-03-22 WO PCT/EP2022/057544 patent/WO2022218660A1/fr not_active Ceased
- 2022-03-22 EP EP22717386.1A patent/EP4323217A1/fr not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19532325C2 (de) * | 1995-09-01 | 2001-07-19 | Daimler Chrysler Ag | Verfahren zum Betrieb eines Serienhybridantriebs |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3121897B1 (fr) | 2024-03-08 |
| FR3121897A1 (fr) | 2022-10-21 |
| WO2022218660A1 (fr) | 2022-10-20 |
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