EP3303806A1 - Procede de compensation d'un couple maximal dans l'agrement preventif - Google Patents
Procede de compensation d'un couple maximal dans l'agrement preventifInfo
- Publication number
- EP3303806A1 EP3303806A1 EP16733649.4A EP16733649A EP3303806A1 EP 3303806 A1 EP3303806 A1 EP 3303806A1 EP 16733649 A EP16733649 A EP 16733649A EP 3303806 A1 EP3303806 A1 EP 3303806A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- cmax
- engine
- maximum torque
- preventive
- 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- Withdrawn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
- 230000003449 preventive effect Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001133 acceleration Effects 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000006870 function Effects 0.000 claims description 5
- 238000013507 mapping Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- BUADUHVXMFJVLH-UHFFFAOYSA-N 7-chloro-3-imidazol-1-yl-2H-1,2,4-benzotriazin-1-ium 1-oxide Chemical compound N1[N+](=O)C2=CC(Cl)=CC=C2N=C1N1C=CN=C1 BUADUHVXMFJVLH-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/105—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
- F02D2200/1004—Estimation of the output torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1006—Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/12—Timing of calculation, i.e. specific timing aspects when calculation or updating of engine parameter is performed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/26—Control of the engine output torque by applying a torque limit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/28—Control for reducing torsional vibrations, e.g. at acceleration
-
- 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
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
Definitions
- the invention relates to a method of compensation of a maximum torque in the preventive approval.
- the invention applies to the field of controlling the control of vehicles equipped with a gasoline or diesel power unit with a manual gearbox, automated, controlled or double clutch.
- Such vehicles are equipped with a computer to automatically adapt the operating point of each of the vehicle components, in particular the engine, to meet the will of the driver in terms of requested torque.
- the computer uses two types of torque filtering requested by the driver using a preventive approval module and a curative approval module.
- the preventive approval module thus ensures a filtering of the target torque corresponding to the will of the driver in order to pass the engine games by limiting the jolts of the drive chain as much as possible.
- engine games is the phenomenon of torsion of the transmission elements between the moment when the heat engine lands on its holds and the moment when the engine drives the vehicle.
- the engine sets thus correspond to the applied torque for which neither the engine nor the wheel train with each other during a transient phase of acceleration.
- the curative amenity module can mitigate any oscillations of the engine speed resulting from the passage of engine games. For this purpose, it generates a torque in phase opposition with the engine speed.
- the preventive approval module filters the setpoint torque Ce during a PA approval phase.
- the profile of the preventive torque Cp allows a smooth transition of the engine clearances, according to a first torque threshold S1 corresponding to an input instant t1 in the engine sets and a second torque threshold S2 corresponding to an output instant t2. motor games.
- the preventive torque Cp converges as quickly as possible to the target torque Ce, during a PB phase called "brilliant".
- the preventive approval limits the preventive torque Cp by a couple maximum.
- the maximum torque is the torque that the engine can deliver at a given operating point.
- the maximum achievable maximum torque Cmax by the engine is calculated all high dead points (TDC) because this maximum torque Cmax depends on the parameters of injection, air and ignition advance for the engines species.
- the piston is at the top dead center when the volume of the combustion chamber of the cylinder is at the lowest, that is to say when the piston is at its highest stroke in the cylinder.
- the top dead center time here corresponds to the time between the occurrence of two top dead spots successively passed by one of the engine pistons, regardless of the cylinder to which this piston belongs. This period of high dead point therefore decreases when the engine speed increases.
- This high dead time also decreases as the number of engine cylinders increases. For example for a three cylinder a PMH has passed through one of the engine pistons every 240 DV against 180 DV for a four cylinder and the duration of a degree crankshaft DV decreases with the engine speed.
- the preventive approval module for example of the order of 10 ms
- the duration of top dead point can for example reach 40 ms for a three-cylinder engine to a regime of the order of 1000rpm.
- a Z zone in Figure 1 corresponds to an overconsumption of fuel and a lack of brio because of an underestimation of the available torque.
- a difference of the order of 40N.m was found between the calculated maximum torque Cmax_c and the actual maximum torque Cmax. There was therefore an underestimation of about 30% of the actual maximum torque Cmax at low engine speed.
- this conversion delay becomes recurrent and harmful to the driving pleasure of the vehicle.
- the invention aims to effectively overcome this disadvantage by proposing a filtering method of a motor setpoint torque for a motor vehicle, comprising: a step of determining a setpoint torque corresponding to an acceleration will of a driver,
- a step of determining a preventive torque limited by said calculated maximum torque characterized in that during an acceleration phase of said vehicle, a determined amount of torque is added to said maximum torque calculated so as to compensate for a estimation due to a conversion delay between a maximum actual achievable torque and said calculated maximum torque.
- the invention thus makes it possible to correct the conversion delay and to adapt the preventive torque in acceleration in order to reduce the fuel consumption, as well as the rejection of polluting particles while improving the brio of the vehicle.
- the adaptation of the engine control strategy thus ensures optimum driving pleasure.
- the invention also has the advantage of requiring only an adaptation of the software implementation of the computer, which limits the cost of its implementation.
- the amount of torque added is determined as a function of engine speed and / or a gear ratio.
- the maximum achievable maximum torque is determined at top dead center.
- the amount of torque added is obtained from a map providing said amount of torque added as a function of engine speed (Wm).
- the mapping establishes a linear relationship between the amount of torque added as a function of the engine speed.
- said setpoint torque is determined from an engine speed, a gear ratio and a position of an accelerator pedal.
- said amount of torque is added to the maximum torque calculated during the determination of the preventive torque.
- the step of adding the amount of torque to said calculated maximum torque is inhibited.
- the invention also relates to an engine computer having a memory storing software instructions for implementing the filtering method of a target torque as previously defined.
- Figure 1 is a graphical representation of a filter profile applied by the preventive approval module during an acceleration according to the state of the art
- Figure 2 is a schematic representation of a management system of the torque control of a thermal power train according to the present invention
- FIG. 3 is a graphic representation of a filter profile applied by the preventive approval module during an acceleration according to an implementation of the method of the present invention.
- FIG. 2 shows a system 1 for managing the torque control of a heat engine integrated in an engine computer comprising a memory storing software instructions for implementing the method of filtering a setpoint torque Ce. according to the present invention.
- This system 1 comprises a module 2 for interpreting the driver's will generating a set torque Ce, and a module 3 for preventive approval ensuring a filtering of the set torque Ce.
- a module 4 of curative approval can mitigate any oscillations of a motor speed Wm resulting in particular from a passage of the engine games.
- the module 2 determines the target torque Ce from the engine speed Wm, a gear ratio R engaged and a position P of the accelerator pedal actuated by the driver to transcribe the driver's desire for acceleration.
- the torque Cpm of engine losses is the torque needed by the engine to drive the vehicle forward. This torque Cpm of engine losses takes particular motor friction as well as losses related to accessories, such as the alternator or air conditioning.
- the module 4 of curative approval monitors the evolution of the engine speed Wm and attenuates the possible speed oscillation by generating a correction torque Ccor in phase opposition with the engine speed Wm.
- the resulting torque is the torque Final Cf sent to the engine and converted into control of the various bodies, such as for example a quantity of fuel to be injected into the cylinders of the engine.
- FIG. 3 shows a graphical representation of the filtering of the target torque Ce corresponding in this case to an acceleration of the vehicle. More precisely, the preventive torque Cp reaches a first torque threshold S1 corresponding to an input instant t1 in the engine games and then a second torque threshold S2 corresponding to an output time t2 of the engine games during a PA approval phase. allowing passage of the engine games. Once the passage of games completed at time t2, the preventive torque Cp converges as quickly as possible to the target torque Ce during a PB phase called "brilliant".
- the preventive approval module 3 limits the preventive torque Cp by a maximum calculated torque Cmax_c.
- a maximum calculated torque Cmax_c is applied on the calculated maximum torque Cmax_c.
- This torque offset represents an addition of a determined amount of torque applied to the calculated maximum torque Cmax-c during the determination of the preventive torque Cp. This offset then makes it possible to modify the construction of the profile of the preventive torque Cp in the preventive approval module 3 so that it takes into account the conversion delay and is as close as possible to the maximum actual torque Cmax.
- the torque offset depends on the engine speed Wm and / or the ratio of the gearbox R.
- the longer the dead center times are long (for low engine speeds Wm) the greater the conversion delay is and therefore the longer the offset applied is important.
- This filtering of the set torque This thus makes it possible to compensate for the conversion delay by adding the above-mentioned offset to the calculated maximum torque Cmax_c.
- the offset acts as if the calculated maximum torque Cmax_c was a maximum torque recalculated taking into account the conversion delay. In this way, the offset makes it possible to obtain a preventive pair Cp as close as possible to the actual maximum torque Cmax.
- the zone Z corresponding to an overconsumption of fuel is reduced, which reduces the discharge of polluting particles and improves the brilliance of the vehicle.
- the offset is applied to the calculated maximum torque Cmax_c only during an acceleration phase, and is inhibited during a deceleration phase, that is to say that no offset will be applied during the deceleration phase.
- the goal is to cut the injection as quickly as possible, so that an underestimation of the actual maximum torque Cmax and the preventive torque Cp is beneficial.
- an addition of the order of 40 Nm to the calculated maximum torque Cmax_c at a motor speed Wm of the order of 1000 rpm and an addition substantially zero at the maximum calculated torque Cmax_c at a motor speed Wm of the order of 4000 rpm avoids any conversion delay acceleration phase and obtain a preventive torque profile Cp closer to the actual maximum torque Cmax.
- a linear mapping of the offset torque applied as a function of the engine speed Wm which is simpler to process.
- the mapping may have any other form (exponential, logarithmic) adapted to the implementation of the method on a given engine. The values entered in the map can be determined during preliminary calibration tests.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1554949A FR3036740B1 (fr) | 2015-06-01 | 2015-06-01 | Procede de compensation d’un couple maximal dans l’agrement preventif |
| PCT/FR2016/051284 WO2016193605A1 (fr) | 2015-06-01 | 2016-05-30 | Procede de compensation d'un couple maximal dans l'agrement preventif |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3303806A1 true EP3303806A1 (fr) | 2018-04-11 |
Family
ID=53541837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16733649.4A Withdrawn EP3303806A1 (fr) | 2015-06-01 | 2016-05-30 | Procede de compensation d'un couple maximal dans l'agrement preventif |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3303806A1 (fr) |
| CN (1) | CN107690518B (fr) |
| FR (1) | FR3036740B1 (fr) |
| WO (1) | WO2016193605A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3078746A1 (fr) * | 2018-03-08 | 2019-09-13 | Psa Automobiles Sa | Procede de pilotage d’un moteur thermique suite a des demandes de limitation des emissions d’oxydes d’azote et/ou de particules |
| FR3133569A1 (fr) * | 2022-03-17 | 2023-09-22 | Psa Automobiles Sa | Procédé de commande d'un systeme de trains roulants d'un véhicule automobile |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005050785A1 (de) * | 2005-10-10 | 2007-04-12 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine eines Kraftfahrzeugs |
| JP4464932B2 (ja) * | 2006-04-27 | 2010-05-19 | 日立オートモティブシステムズ株式会社 | エンジンの制御装置 |
| JP4765887B2 (ja) * | 2006-10-11 | 2011-09-07 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
| JP4872789B2 (ja) * | 2007-05-10 | 2012-02-08 | トヨタ自動車株式会社 | 車両駆動ユニットの制御装置 |
| JP5357852B2 (ja) * | 2010-09-17 | 2013-12-04 | 本田技研工業株式会社 | 内燃機関の制御装置 |
| DE102011084844A1 (de) * | 2011-10-20 | 2013-04-25 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum näherungsweisen Ermitteln des von einer Kupplung eines Antriebsstrangs eines Fahrzeugs tatsächlichen übertragenen Drehmoments |
| FR2998006B1 (fr) * | 2012-11-09 | 2015-01-02 | Peugeot Citroen Automobiles Sa | Procede de filtrage d'un couple de consigne moteur lors d'un passage des jeux moteur |
| FR2998332B1 (fr) * | 2012-11-22 | 2017-12-22 | Peugeot Citroen Automobiles Sa | Procede de gestion d'un couple moteur d'un vehicule automobile en fonction des conditions climatiques |
| FR3007074B1 (fr) * | 2013-06-12 | 2015-06-26 | Peugeot Citroen Automobiles Sa | Procede d’agrement preventif et systeme de commande d’un groupe motopropulseur hybride |
| FR3007367B1 (fr) * | 2013-06-20 | 2016-03-04 | Peugeot Citroen Automobiles Sa | Procede de filtrage d'un couple de consigne moteur lors d'un passage des jeux moteur tenant compte d'une precision du couple et calculateur moteur correspondant |
-
2015
- 2015-06-01 FR FR1554949A patent/FR3036740B1/fr not_active Expired - Fee Related
-
2016
- 2016-05-30 EP EP16733649.4A patent/EP3303806A1/fr not_active Withdrawn
- 2016-05-30 WO PCT/FR2016/051284 patent/WO2016193605A1/fr not_active Ceased
- 2016-05-30 CN CN201680032387.6A patent/CN107690518B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016193605A1 (fr) | 2016-12-08 |
| CN107690518A (zh) | 2018-02-13 |
| CN107690518B (zh) | 2020-12-01 |
| FR3036740A1 (fr) | 2016-12-02 |
| FR3036740B1 (fr) | 2017-06-09 |
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