EP3601019A1 - Aerodynamic blade actuated by an energy storage device - Google Patents
Aerodynamic blade actuated by an energy storage deviceInfo
- Publication number
- EP3601019A1 EP3601019A1 EP18715209.5A EP18715209A EP3601019A1 EP 3601019 A1 EP3601019 A1 EP 3601019A1 EP 18715209 A EP18715209 A EP 18715209A EP 3601019 A1 EP3601019 A1 EP 3601019A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flap
- aerodynamic blade
- vehicle
- torsion spring
- aerodynamic
- 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- Withdrawn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
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D35/00—Vehicle bodies characterised by streamlining
-
- 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
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/08—Air inlets for cooling; Shutters or blinds therefor
- B60K11/085—Air inlets for cooling; Shutters or blinds therefor with adjustable shutters or blinds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
- B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
Definitions
- the invention relates to the field of motor vehicles, and more particularly aerodynamic devices arranged at specific locations of a vehicle to reduce the aerodynamic drag generated by the vehicle traveling at high speed or to open or close a duct d arrival of air.
- these flaps are driven in translation or in rotation about an axis, by electric actuators. These relatively flexible means allow to open or close at will flaps of the aerodynamic blade depending on the running configuration of the vehicle. The flaps then alternate between an open position and a closed position and, in a few rarer cases, between one or two intermediate positions.
- the actuators have the disadvantage of being energy-hungry, particularly when the movements to be performed require significant torque.
- the flaps are mounted so that their axes of rotation are located substantially in the immediate vicinity of the surface of the vehicle body in order to reduce the size of the aerodynamic blade. This arrangement has the effect of creating an additional torque generated by the aerodynamic forces acting on the surface of the flaps when the vehicle is traveling at high speed, which adds to the opening or closing torque.
- the object of the invention is to propose an original solution to the problem mentioned above.
- the aerodynamic blade according to the invention is intended to equip a vehicle to engine. It comprises a flap mounted on an axle carrying shaft XX ', which is connected to a chassis of the vehicle by at least one bearing, and which is rotated about said axis between an open position and a closed position by a motor assembly .
- This aerodynamic blade is characterized in that said motor assembly comprises mechanical energy accumulation means whose accumulated energy level is adjustable to deliver on demand a sufficient torque allowing the flap to change position in one almost instantaneous time, understood here as less than 1 second.
- mechanical energy accumulator is understood to mean a mechanical means whose potential energy is variable and adaptable, and which is capable of delivering this energy in the form of a mechanical work product of a force and of a displacement, in this case a torque and a rotation, under the solicitation of a given order.
- a water reservoir for example, a water reservoir, a mass disposed at the end of a beam, or a spring, as will be seen later, are mechanical energy accumulators.
- the energy accumulator can be recharged using low power means for a given duration, in the period of time preceding the passage of the flap from the open position to the closed position or the closed position. in the open position.
- the accumulated energy level is variable and will depend, using the examples mentioned above, the water level, the height of the mass or the spring tension. This energy level can also be adjustable, so that the amount of work delivered on demand remains limited to just necessary to ensure the passage of the shutter from one position to another.
- the torque delivered by the energy accumulator is an opening torque or a closing torque according to the initial open or closed position in which the flap is located.
- the device according to the invention may also comprise in isolation, or in combination, the following characteristics:
- the mechanical energy accumulation means are formed by a spring of twisting axis XX '.
- the motor assembly comprises a locking assembly provided with an interlocking finger movable in translation between a first and a second position, and configured so that, when the engagement finger is in the first position the rotation of the carrier shaft is blocked when the flap is in the open or closed position, and when the locking finger is in the second position the carrier shaft is free to rotate.
- the locking assembly comprises a locking disc of axis XX ', mounted integral with the carrier shaft, comprising a first and a second housing for receiving the engagement finger in the first position, when the flap is respectively in position open or in closed position.
- the motor assembly comprises a main actuator fixed to the chassis of the vehicle driving in rotation a motor pinion of a given diameter, coaxial with the axis of the carrier shaft, and engaged with a drive pinion mounted to rotate freely on the carrier tree.
- the diameter of the drive pinion is greater than or equal to the diameter of the drive pinion.
- a first axial extension of the torsion spring is mounted in an insertion disposed on an edge of the flap and a second axial extension of the torsion spring is mounted in an insertion disposed on a face of the drive pinion, so that the rotation of the motor pinion in one direction of rotation or in another, causes the tension of the torsion spring when the engagement finger is in the first position.
- the motor assembly comprises fluidic damping means for braking the rotation of the carrier shaft.
- the motor assembly includes a position sensor for determining the open or closed position of the shutter.
- the aerodynamic blade is associated with a central unit comprising algorithms in the form of coded instructions which, when executed, control:
- the central unit includes an algorithm for controlling the main actuator so as to adjust the tension of the torsion spring according to vehicle parameters.
- the central unit includes an algorithm for controlling the locking assembly to control the passage of the flap from one position to another depending on a given threshold of said vehicle parameters.
- Said vehicle parameters comprise a vehicle speed, and / or a cooling water temperature, and / or a detection of an imminent need such as an impact or the safety of the vehicle.
- the central unit comprises an algorithm allowing a single change of position of the flap in a given time interval, preferably between 5 and 30 seconds.
- the central unit comprises an algorithm for controlling the main actuator so as to adjust in successive stages according to said vehicle parameters, and when the engagement finger is in the first position, the tension of the torsion spring so that , in the event of a request to change the position of the flap, the addition of the torque delivered by the torsion spring and the torque generated by the aerodynamic forces acting on the flap remain between two predetermined limits.
- the central unit comprises an algorithm making it possible to drive the main actuator so as to reduce the tension of the spring to a value close to zero when the vehicle engine is stationary.
- Figure 1 is a schematic representation in front view of an aerodynamic blade according to the invention.
- Figure 2 is a schematic side view of the lock assembly.
- FIGS. 3a, 3b, 3c are diagrammatic representations in front view and in side view of the position sensor
- FIG. 4 represents the diagrams making it possible to follow the evolution of the pretension imposed on the torsion spring as a function of time and of the speed of the vehicle as a function of time.
- the aerodynamic blade 1 illustrated in Figure 1 is the assembly of a flap 10 and a motor assembly 2.
- the flap 10 is mounted on a bearing shaft 27 of axis XX '.
- This carrier shaft is secured to the chassis of the vehicle (not shown) by a bearing 270.
- the bearing 270 represented by dotted lines, is located in the housing of an actuator 23 main, itself attached to the chassis of the vehicle.
- the carrier shaft 27 can also be connected to the frame by two bearings located axially on either side of the flap 10.
- the main actuator 23 comprises an electric motor (not visible) rotating a motor shaft 220 supporting a motor pinion 22 diameter ⁇ given.
- the axis of the motor pinion 22 and the drive shaft 220 is parallel to the axis XX 'of the bearing shaft 27.
- the drive gear 220 is engaged with a drive pinion 21 of axis XX 'mounted free to rotate on the carrier shaft 27.
- the drive gear 21 has a diameter ⁇ 2, preferably greater than or equal to the diameter ⁇ 1 of the drive gear 22.
- This torsion spring 20 comprises a first axial extension 201 for anchoring the first end of the torsion spring 20 in an insertion 11 arranged on the edge of the flap 10, and a second axial extension 202 for anchoring the second end of the torsion spring 20 in an insertion 210 arranged in a face of the drive pinion 21.
- a locking assembly 25 completes the above mechanism by allowing rotation or blocking of the carrier shaft 27. Also visible in Figure 2, the locking assembly 25 comprises a locking disc 254 secured to the bearing shaft 27.
- the locking disc 254 comprises a first and a second housing, respectively 255 and 256, disposed on the periphery of the disc 254.
- a locking finger 251 is driven in translation between a first and a second position by an electromagnet 250 secured to the chassis of the vehicle.
- the engagement finger 251 In first position, the engagement finger 251 enters one of the housings 255, 256, and prevents the rotation of the carrier shaft 27.
- the circumferential position of the housings 255 and 256 is adjusted to correspond angularly respectively to the open position and to the the closed position of the flap 10. When the engagement finger 251 is in first position, the flap 10 is thus locked in the open position or in the closed position.
- the engagement finger 251 slides on the circumference of the locking disc 254, and allows the rotation of the carrier shaft 27 about the axis XX 'to allow the flap 10 to move from the open position to the closed position and vice versa.
- the locking assembly 25 also comprises a return spring 253 coaxial with a guide rod 252 supporting at its end the engagement finger 251 itself.
- a return spring 253 coaxial with a guide rod 252 supporting at its end the engagement finger 251 itself.
- the guide rod 252 is free to translate axially in the body of the electromagnet 250.
- the latching finger 251 is then held in its position in one of the housings (255 256) by the action of the return spring 253 interposed between the body of the electromagnet 250 and the locking finger.
- the engagement finger 251 has a substantially rounded shape or having a slope, complementary to the substantially concave or sloping form of the first and second housing 255, 256. Also, when a torque greater than a predetermined threshold s' exerts on the carrier shaft, the engagement finger 251 can disengage from the housing (255, 256) to allow the flap 10 to rotate.
- the adjustment of the threshold can be done by adjusting the compression of the return spring 253. This arrangement allows for example to fold the flap 10 when the latter is in the open position and hits an obstacle or is under too much stress likely to engage its ruin .
- the torque exerted by the torsion spring on the shaft 27 remains below the predetermined threshold of disengagement of the engagement finger 251 of the housing 255 or 256.
- the electromagnet 250 is able to compress the return spring 253 to pass the engagement finger 251 from the first to the second position.
- the spring 20 By rotating the drive pinion 21 in one direction the spring 20 is compressed so that it generates an opening torque of the flap 10 and, when the drive pinion 21 is rotated in the opposite direction , the spring 20 is compressed so that it generates a closing torque of the flap 10.
- the torque at the motor shaft 220 is usefully between 1 to 8 Nm and the rotational speed of the motor pinion 22 is between 4 to 20 revolutions per minute. The lower the rotation speed of the motor shaft, the greater the gain in torque at equal power.
- the motor assembly 2 of the aerodynamic blade 1 may also comprise a fluid damper 24 acting on the carrier shaft 27 so as to reduce the impact of the flap 10 against the stroke limiter during the closing movement or 10.
- a position sensor 26 formed for example of a non-contact sensor, or a cam 260 and a contact 261, as shown. in detail in Figures 3a, 3b and 3c.
- the tensioning of the spring is not instantaneous and can therefore last several seconds. On the order of ten seconds in the case of power and gear ratios mentioned above.
- the control of the aerodynamic blade 1 can then usefully be achieved using a central unit 4 disposed at a suitable location of the vehicle.
- the central unit 4 includes in its memory coded instructions which, when executed, allow to implement the algorithms described below.
- the central unit is thus connected, via an appropriate power electronics, to the main actuator 23, to the electromagnet 250, to the contact 261, and to the control unit of the vehicle controlling the main parameters of the vehicle.
- the central unit 4 driver according to said vehicle parameters, such as the speed of the vehicle, the temperature of the cooling water or an imminent need such as a shock or the safety of the vehicle, and by anticipation, the level of mechanical energy accumulated by the tensioning of the torsion spring 20, or the movement of the engagement finger 251 allowing the passage of the flap 10 from one position to another.
- vehicle parameters such as the speed of the vehicle, the temperature of the cooling water or an imminent need such as a shock or the safety of the vehicle, and by anticipation, the level of mechanical energy accumulated by the tensioning of the torsion spring 20, or the movement of the engagement finger 251 allowing the passage of the flap 10 from one position to another.
- FIG. 4 illustrates, in the case of an aerodynamic blade placed under underbase, the evolution of the tension of the torsion spring 20 as a function of the speed of the vehicle during a cycle of rolling.
- the vehicle is stopped, and the tension of the torsion spring is zero.
- the flap 10 is in the closed position, and the engagement finger 251 is in first position in the second housing 256.
- the main actuator is rotated so as to cause the drive gear to travel an angular stroke equivalent to the full opening of the blade, and the tension in the torsion spring increases. up to a predetermined maximum level.
- the vehicle reaches and exceeds a given threshold speed Vs, for example the speed of 60Km / h.
- Vs a given threshold speed
- the engagement finger 251 then moves from the first to the second position and releases the potential mechanical energy accumulated as an opening torque in the torsion spring 20.
- the flap 10 then rotates instantly by one quarter. turn around the axis XX ', and goes into open position.
- the engagement finger 251 slides on the peripheral portion of the locking disk 254 and comes, under the action of the return spring 253, to be in the first position in the first housing 255.
- the rotation of the carrier shaft 27 is blocked and the flap 10 is kept in the open position.
- the main actuator 23 is then restarted, in the opposite direction, to return the torsion spring 20 in compression so as to release a torque capable of generating the closing the shutter 10 in anticipation of a closing order.
- the aerodynamic forces applying to the flap 10 also increase and are likely to add to the closing torque generated by the torsion spring 20, in case a closing order of the part 10 would be given.
- the main actuator 23 then adjusts the tension of the torsion spring 20, decreasing it when the speed remains high, as is the case between t.2 and t3, or increasing it if necessary, as it is the case to h, so that, in the event of a request to change the position of the flap, the addition of the torque delivered by the torsion spring and the torque generated by the aerodynamic forces acting on the flap 10, remains between two predetermined limits.
- this adjustment can be usefully in increments of 20Km / h.
- the vehicle speed drops below the threshold Vs.
- the engagement finger then passes to the second position and the flap 10 closes immediately.
- the engagement finger 251 returns to the first position and is placed in the second housing 256.
- This cycle can then start again if necessary as described above.
- the main actuator 23 When the vehicle is stopped at time ts, and when the ignition is switched off, the main actuator 23 continues to reduce the tension of the torsion spring 20, until it returns, at time t &, at a null value.
- the central unit comprises an algorithm allowing a single change of position of the flap in an interval of given time that can usefully be between 5 and 30 seconds.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Wind Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1752259A FR3063967B1 (en) | 2017-03-20 | 2017-03-20 | AERODYNAMIC BLADE ACTIVATED BY AN ENERGY ACCUMULATION DEVICE |
PCT/FR2018/050650 WO2018172675A1 (en) | 2017-03-20 | 2018-03-16 | Aerodynamic blade actuated by an energy storage device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3601019A1 true EP3601019A1 (en) | 2020-02-05 |
Family
ID=58779176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18715209.5A Withdrawn EP3601019A1 (en) | 2017-03-20 | 2018-03-16 | Aerodynamic blade actuated by an energy storage device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20210276633A1 (en) |
EP (1) | EP3601019A1 (en) |
CN (1) | CN110691731A (en) |
FR (1) | FR3063967B1 (en) |
MA (1) | MA48985A (en) |
WO (1) | WO2018172675A1 (en) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5096156A (en) * | 1991-04-22 | 1992-03-17 | Beutler Heating & Air Conditioning, Inc. | Motorized damper apparatus |
JP4678499B2 (en) * | 2005-06-27 | 2011-04-27 | アイシン精機株式会社 | Movable grill shutter device |
JP2007191085A (en) * | 2006-01-20 | 2007-08-02 | Toyota Motor Corp | Straightening device for vehicle |
DE102008013420A1 (en) * | 2008-03-10 | 2009-09-17 | Röchling Automotive AG & Co. KG | Motor vehicle vent device has changeable air flow cross section for changing air flow in vehicle interior, particularly engine compartment, and control unit as cross flowable unit is movably arranged relative to base unit |
EP2621747A2 (en) * | 2010-09-27 | 2013-08-07 | SRG Global, Inc. | Shutter system for vehicle grille |
KR101272912B1 (en) * | 2010-11-10 | 2013-06-11 | 현대자동차주식회사 | Active air flap apparatus |
JP5843609B2 (en) * | 2011-12-28 | 2016-01-13 | 株式会社ミクニ | Shutter device |
US9573458B2 (en) * | 2012-10-03 | 2017-02-21 | Magna, International Inc. | Spring operated back-up/fail-safe module for active grille shutter systems |
NL2010428C2 (en) * | 2013-03-11 | 2014-09-16 | Mci Mirror Controls Int Nl Bv | ADJUSTMENT DEVICE, METHOD OF ADJUSTING, MOTOR VEHICLE. |
GB2518829A (en) * | 2013-10-01 | 2015-04-08 | Johnson Electric Sa | Actuator and Grille Incorporating the Actuator |
KR101532976B1 (en) * | 2014-09-01 | 2015-07-01 | 현대모비스 주식회사 | Air flap device for vehicle |
JP6236381B2 (en) * | 2014-12-25 | 2017-11-22 | 株式会社ファルテック | Vehicle grill shutter, vehicle flap member, and actuator |
JP6101665B2 (en) * | 2014-09-30 | 2017-03-22 | 株式会社ファルテック | Grill shutter for vehicle |
EP3002145B1 (en) * | 2014-09-30 | 2017-10-18 | Faltec Company Limited | Vehicle grill shutter, vehicle flap member, and actuator |
CN104842751B (en) * | 2014-10-23 | 2017-09-15 | 北汽福田汽车股份有限公司 | Ventilation device for automobile and automobile |
DE102015101213A1 (en) * | 2015-01-28 | 2016-07-28 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Front part of a motor vehicle |
FR3037871B1 (en) * | 2015-06-26 | 2018-12-07 | Valeo Systemes Thermiques | AIR INTAKE SHUTTER AND FRONT FACE MODULE |
CN105015466A (en) * | 2015-08-15 | 2015-11-04 | 苏州黄章妹族工业设计有限公司 | Self-rotating air inlet grid for automobile |
US10100707B2 (en) * | 2016-02-29 | 2018-10-16 | Montaplast of North America, Inc. | Active grille shutter and shutter subassembly for use with active grill shutters |
FR3050404B1 (en) * | 2016-04-22 | 2019-08-02 | Compagnie Plastic Omnium | DEVICE FOR OPENING AND CLOSING SHUTTERS |
EP3707022A1 (en) * | 2018-01-19 | 2020-09-16 | Valeo Systemes Thermiques | Louvre-control device, in particular for a motor vehicle, and frame comprising such a device |
-
2017
- 2017-03-20 FR FR1752259A patent/FR3063967B1/en not_active Expired - Fee Related
-
2018
- 2018-03-16 US US16/496,036 patent/US20210276633A1/en not_active Abandoned
- 2018-03-16 EP EP18715209.5A patent/EP3601019A1/en not_active Withdrawn
- 2018-03-16 WO PCT/FR2018/050650 patent/WO2018172675A1/en unknown
- 2018-03-16 MA MA048985A patent/MA48985A/en unknown
- 2018-03-16 CN CN201880018242.XA patent/CN110691731A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210276633A1 (en) | 2021-09-09 |
MA48985A (en) | 2020-02-05 |
CN110691731A (en) | 2020-01-14 |
FR3063967A1 (en) | 2018-09-21 |
WO2018172675A1 (en) | 2018-09-27 |
FR3063967B1 (en) | 2019-05-10 |
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