EP4165322A1 - Procede de reduction de contraintes sur un tendeur accessoires - Google Patents
Procede de reduction de contraintes sur un tendeur accessoiresInfo
- Publication number
- EP4165322A1 EP4165322A1 EP21732413.6A EP21732413A EP4165322A1 EP 4165322 A1 EP4165322 A1 EP 4165322A1 EP 21732413 A EP21732413 A EP 21732413A EP 4165322 A1 EP4165322 A1 EP 4165322A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- electrical machine
- tensioner
- mel
- grad
- 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- Withdrawn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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H7/10—Means for varying tension of belts, ropes or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1209—Means for varying tension of belts, ropes or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
- F16H7/1245—Means for varying tension of belts, ropes or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the dissipating material type, e.g. elastomeric spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0865—Pulleys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0874—Two or more finally actuated members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0876—Control or adjustment of actuators
- F16H2007/0885—Control or adjustment of actuators the tension being a function of engine running condition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0891—Linear path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0897—External to internal direction
Definitions
- the present invention relates to a method of reducing stresses on an accessory tensioner.
- the invention finds a particularly advantageous, but not exclusive, application with a hybrid powertrain of a motor vehicle using at least an alternator-starter driven by a transmission belt. If necessary, another electric machine can start the heat engine.
- an accessories facade comprises a transmission belt cooperating with a pulley mounted on a crankshaft of the heat engine as well as with a pulley mounted on a shaft of a rotating electrical machine.
- the belt on the accessory facade can also drive other components, such as a water pump or an air conditioning compressor with which corresponding drive pulleys are associated.
- the reversible type rotating electric machine called an alternator-starter, is able to operate in a generator mode to ensure the recharging of a battery of the motor vehicle and in an engine mode to ensure a rotational drive of the crankshaft in order to start the heat engine or, if necessary, provide it with excess engine torque.
- the torque applied to the transmission belt changes sign.
- the torque applied is positive when the electric machine is driving because the electric machine then supplies a mechanical torque to the transmission belt.
- the torque applied is negative when the electric machine operates in generator mode in an electrical energy recovery mode, because the electrical machine then takes torque from the transmission belt.
- a pendulum tensioner comprising a first arm provided with a first roller capable of coming into contact with a first strand of the transmission belt and a second arm provided with a second roller capable of coming into contact with a second strand of the transmission belt.
- the arms are movable in rotation around pivot links.
- the arms are further connected by a tension spring.
- the pendulum tensioner is articulated so as to be able to selectively take a first operating state or a second operating state.
- first operating state corresponding to an operation of the electric machine in alternator mode
- the first arm bears against a corresponding stop, while the second arm can oscillate.
- second operating state corresponding to operation of the electric machine in motor mode
- the second arm bears against a corresponding stop while the first arm can oscillate.
- the tensioner will be able to maintain a constant tension in the belt regardless of the operating mode of the electric machine and the direction of the torque applied to the transmission belt.
- the distance between the two rollers depends on the acyclisms to be absorbed, as well as any wear and fatigue.
- the invention aims to effectively remedy this drawback by providing a method of controlling a rotating electrical machine comprising a pulley cooperating with a transmission belt of an accessory facade, - the transmission belt being kept taut by a pendulum tensioner comprising:
- said method comprising a step of controlling a torque gradient of the rotating electrical machine during a transient phase in which the tensioner passes from one operating state to another.
- the invention allows, by thus controlling the torque gradient of the electric machine during the transient phase, to reduce the stresses applied to the accessory tensioner during a change of state of the pendulum tensioner
- the invention makes it possible to reduce the impact forces when an arm of the tensioner comes into contact with its stop at the end of a transitional phase.
- the invention also makes it possible to preserve the performance of the rotating electrical machine in energy recovery mode or in mechanical energy input in order to limit carbon dioxide emissions.
- the invention is also economical in nature, insofar as it can be implemented by software implementation in a memory of a computer.
- said method comprises the step of imposing on the rotating electrical machine an absolute value of torque gradient during the transient phase less than an absolute value of gradient torque imposed after the pendulum tensioner has changed operating state.
- the absolute value of the torque gradient of the rotating electrical machine during the transient phase is constant.
- the absolute value of the torque gradient of the rotating electrical machine during the transient phase is of the order of 150 N. m / s.
- the absolute value of the torque gradient of the rotating electrical machine after the pendulum tensioner has changed state is of the order of 1000 N. m / s.
- a duration of the transient phase is of the order of 5 ms.
- a torque gradient setpoint change time is of the order of 10 ms.
- the subject of the invention is also a computer comprising a memory storing software instructions for implementing the method for controlling a rotating electrical machine as defined above.
- the invention further relates to a motor vehicle comprising a computer as defined above.
- FIG. 1 a is a schematic representation of a rotary electric machine comprising a pulley cooperating with a transmission belt of an accessories facade associated with a pendulum tensioner in a first operating state
- FIG. 1 b is a schematic representation of a rotating electric machine comprising a pulley cooperating with a transmission belt of an accessories facade associated with a pendulum tensioner in a second operating state
- FIG. 2 is a graphic representation of an evolution, as a function of time, of a current of the rotating electrical machine during a change of operating mode of the rotating electrical machine;
- FIG. 3 represents an evolution, as a function of time, of the forces applied to the arms of the pendulum tensioner during the various operating modes of the rotating electrical machine;
- FIG. 4 represents an evolution, as a function of time, of a torque gradient of the rotating electrical machine and of a position of an arm of the pendulum tensioner during a change in the operating state of the tensioner.
- Figures 1a and 1b show a rotating electrical machine 10 comprising a pulley 11 cooperating with a transmission belt 12 of an accessory facade.
- the transmission belt 12 also cooperates with a pulley (not shown) mounted on a crankshaft of the heat engine.
- the transmission belt 12 can also ensure the drive of other components, such as a water pump or an air conditioning compressor with which corresponding drive pulleys are associated.
- the electric machine 10 of the reversible type is able to operate in a generator mode to recharge a battery of the motor vehicle and in an engine mode to ensure a rotational drive of the crankshaft in order to start the heat engine or, if necessary, provide it with excess engine torque.
- the alternator-starter can operate at a voltage of 12V, 48V, or more.
- a pendulum tensioner 13 keeps the transmission belt 12 taut.
- the pendulum tensioner 13 comprises a first arm 14.1 provided with a first roller 15.1 adapted to come into contact with a first strand 12.1 of the transmission belt 12 and a second arm 14.2 provided with a second roller 15.2 capable of coming into contact with a second strand 12.2 of the transmission belt 12.
- the arms 14.1, 14.2 are movable in rotation about pivot links 16.1, 16.2.
- the arms 14.1, 14.2 are furthermore interconnected by a tension spring 17.
- the pendulum tensioner 13 is thus articulated so as to be able to selectively take a first operating state or a second operating state.
- first operating state corresponding to an operation of the electric machine 10 in alternator mode
- the first arm 14.1 bears against a corresponding stop 18.1 while the second arm 14.2 can oscillate, as shown in FIG. 1a.
- second operating state corresponding to an operation of the electric machine 10 in motor mode
- the second arm 14.2 bears against a corresponding stop 18.2 while the first arm 14.1 can oscillate, as shown in FIG. 1b.
- the tensioner 13 can ensure constant tension in the belt regardless of the operating mode of the electric machine 10 and the direction of the torque applied to the transmission belt 12.
- the distance between the two rollers 15.1, 15.2 depends on the acyclisms to be absorbed, as well as on possible wear and tear.
- a computer 20, for example the engine computer or a dedicated computer for controlling the electric machine 10, comprises a memory storing software instructions for implementing the method for controlling the electric machine 10 aimed at reducing the stresses on the pendulum tensioner 13.
- the curve C1 represents the evolution, as a function of time, of a current of the rotary electric machine 10 during a change of operating mode of the electric machine 10.
- the evolution of current of the electric machine 10 corresponds to that of the couple.
- Mb engine operating mode
- Mr energy recovery mode
- the electric machine 10 then operates in alternator mode.
- the electric machine 10 then returns to a motor operating mode Mb.
- the tensioner 13 selectively has an arm 14.1, 14.2 bearing against a corresponding stop 18.1, 18.2.
- to each operating mode of the electric machine 10 corresponds an operating state of the pendulum tensioner 13.
- FIG. 3 represents an evolution, as a function of time, of the forces applied to the arms of the tensioner 13 during the various operating modes of the electric machine 10 and therefore of changes of state of the pendulum tensioner 13.
- the curve C2 represents the forces applied to the stressed arm when the electric machine 10 operates in motor mode Mb.
- Curve C3 represents the forces applied to the requested arm when the electrical machine 10 operates in Mr.
- the computer 20 controls a Grad_mel torque gradient of the rotating electrical machine 10 during a transitional phase Trans in which the tensioner 13 passes from one operating state to another.
- FIG. 4 represents a change over time of the position of an arm of the Pos_br tensioner during a change of state. It is observed that the transient phase Trans can be measured between an instant t1 where an arm 14.1, 14.2 of the tensioner 13 is in a position P1 far from its stop 18.1, 18.2 and an instant t2 when the arm 14.1, 14.2 of the tensioner 13 is in a position P2 in which the arm bears against its corresponding stop 18.1, 18.2. This transient phase Trans therefore corresponds to the time it takes for the tensioner 13 to change state.
- the computer 20 imposes on the rotary electrical machine 10 an absolute value V1 of the torque gradient Grad_mel during the transient phase Trans less than an absolute value V2 of torque gradient Grad_mel imposed after the pendulum tensioner 13 has changed operating state.
- the absolute value V1 of the torque gradient Grad_mel of the rotary electrical machine 10 during the transient phase Trans is constant.
- the absolute value of the gradient of torque Grad_mel of the rotary electrical machine 10 during the transient phase is for example of the order of 150 N. m / s.
- By “of the order of” is meant a variation of plus or minus 10% around the target value.
- the absolute value of the gradient of torque Grad_mel could vary progressively in a linear or other manner.
- the absolute value V2 of Grad_mel torque gradient of the rotary electric machine 10 after the pendulum tensioner 13 has changed state is of the order of 1000N.m / s.
- a duration of the transient phase Trans is for example of the order of 5 ms.
- a torque gradient setpoint change duration Grad_mel is of the order of 10 ms. This means that after having sent a torque gradient change setpoint Grad_mel at time t2, it takes 10ms before the torque gradient setpoint is actually applied to the electric machine 10.
- the method according to the invention allows a gain in response time of 0.43 s to pass from an energy recovery mode Mr under a torque of -40 Nm to an engine operating mode Mb under a torque of +40 Nm Indeed, the time required is 0.53 s to switch from one mode to another with the standard strategy and 0.1 s to switch from one mode to another with the method according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2006268A FR3111402B1 (fr) | 2020-06-16 | 2020-06-16 | Procede de reduction de contraintes sur un tendeur accessoires |
| PCT/FR2021/050754 WO2021255351A1 (fr) | 2020-06-16 | 2021-05-03 | Procede de reduction de contraintes sur un tendeur accessoires |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4165322A1 true EP4165322A1 (fr) | 2023-04-19 |
Family
ID=73642956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21732413.6A Withdrawn EP4165322A1 (fr) | 2020-06-16 | 2021-05-03 | Procede de reduction de contraintes sur un tendeur accessoires |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4165322A1 (fr) |
| CN (1) | CN115917184A (fr) |
| FR (1) | FR3111402B1 (fr) |
| WO (1) | WO2021255351A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3542091A (en) | 1968-04-16 | 1970-11-24 | Cater Eng Co | Apparatus for filling containers in a vacuum environment |
| FR3026155B1 (fr) * | 2014-09-23 | 2017-12-08 | Peugeot Citroen Automobiles Sa | Procede de pilotage dynamique d'un tendeur de courroie d'une facade accessoires |
| DE102015211157A1 (de) * | 2015-06-17 | 2016-12-22 | Robert Bosch Gmbh | Verfahren zur Drehmomentbestimmung in einem Riementrieb |
| WO2017205976A1 (fr) * | 2016-05-30 | 2017-12-07 | Litens Automotive Partnership | Agencement d'entraînement sans fin et système de tensionnement pour celui-ci |
| KR20180134564A (ko) * | 2017-06-09 | 2018-12-19 | 현대자동차주식회사 | 엔진용 가변 벨트 텐셔너, 및 그 텐셔너를 이용한 마일드 하이브리드 차량의 제어 방법 |
| US10962092B2 (en) * | 2017-09-08 | 2021-03-30 | Gates Corporation | Tensioner and method |
| FR3077444B1 (fr) * | 2018-01-30 | 2020-01-10 | Valeo Equipements Electriques Moteur | Procede de gestion de coupure de couple moteur pour une machine electrique tournante |
-
2020
- 2020-06-16 FR FR2006268A patent/FR3111402B1/fr active Active
-
2021
- 2021-05-03 CN CN202180043196.0A patent/CN115917184A/zh active Pending
- 2021-05-03 WO PCT/FR2021/050754 patent/WO2021255351A1/fr not_active Ceased
- 2021-05-03 EP EP21732413.6A patent/EP4165322A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021255351A1 (fr) | 2021-12-23 |
| CN115917184A (zh) | 2023-04-04 |
| FR3111402A1 (fr) | 2021-12-17 |
| FR3111402B1 (fr) | 2022-06-24 |
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