WO2021144214A1 - Volant de véhicule avec dispositif de chauffage - Google Patents
Volant de véhicule avec dispositif de chauffage Download PDFInfo
- Publication number
- WO2021144214A1 WO2021144214A1 PCT/EP2021/050351 EP2021050351W WO2021144214A1 WO 2021144214 A1 WO2021144214 A1 WO 2021144214A1 EP 2021050351 W EP2021050351 W EP 2021050351W WO 2021144214 A1 WO2021144214 A1 WO 2021144214A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heating
- track
- steering wheel
- rim
- groove
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 124
- 239000000463 material Substances 0.000 description 10
- 239000004744 fabric Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 206010016334 Feeling hot Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
- B62D1/06—Rims, e.g. with heating means; Rim covers
- B62D1/065—Steering wheels with heating and ventilating means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/83—Steering input members
Definitions
- TITLE Vehicle Steering Wheel with Heating Device
- the present invention relates generally to a vehicle steering wheel comprising a heating device intended to heat a rim of the steering wheel.
- Document US7741581B2 discloses a heated steering wheel.
- Document US6838647B2 discloses a flexible heating element.
- Document DE102004053634A1 discloses a heated steering wheel for a motor vehicle.
- An object of the present invention is to respond to the drawbacks of the prior art mentioned above and in particular, first of all, to provide a steering wheel with a flexible heating device which does not affect the perceived quality by the customer touching the outer surface of the rim while driving the vehicle.
- a first aspect of the invention relates to a vehicle steering wheel comprising: a rim to be grasped by a driver of the vehicle, a trim sleeve, arranged to cover a body of the rim so as to at least partially form an outer surface of the rim, a flexible heating device, interposed between the trim sleeve and the body of the rim, comprising at least one heating track, characterized in that the heating track is a surface track deposited on the flexible heating device, and in that the rim body comprises at least one groove arranged for housing at least part of the flexible heating device, said at least part comprising a portion of the surface track.
- the flywheel according to the above implementation comprises a flexible heating device, and it is planned to provide at least one groove in the body of the rim (typically a foaming material) to accommodate a part of the device.
- flexible heating and in particular a part which comprises a portion of the heating track.
- a surface heating track which excludes, for example, (round) braided threads or linked to a flexible support. It may in particular be a surface track deposited on a flexible substrate of the flexible heating device, which may involve a thickness (e) that is much smaller than a width (I) of the heating track.
- the shape traversed by a surface profile significantly influences the heat produced.
- the invention is advantageous in that it proposes to position specifically in a groove the surface heating zones producing more heat than the rest of the track.
- the heating track can be painted or printed, or can be formed from a conductive fabric.
- the part of the flexible heating device housed in the groove may have a fold, that is to say a double thickness of the flexible heating device obtained by folding the flexible heating device on itself.
- the flexible heating device can be arranged to deliver a target surface heating power, and the part of the flexible heating device housed in the groove and comprising a portion of the surface track, can have at least one specific area wherein a specific area heating power may be different from the target area heating power.
- the flexible heating device which have a higher pfd than the rest are housed in the groove, to move them away from the outer surface of the covering sheath.
- At least one zone with a specific surface heating power is housed in the groove. It is possible, for example, to choose to house at least one zone with a specific surface heating power in a groove if said zone with a specific surface heating power is located in a particular gripping zone. However, it is possible to have another zone with a specific surface heating power (equivalent, similar or different) which is not housed in a groove, if for example this other zone is not disturbing (located for example away from steering wheel grip areas). However, at least at least one zone with a specific surface heating power is housed in the groove, so as to move said zone with a specific surface heating power away from the surface and to make the sensation of heat uniform in at least one place of the surface. flying.
- the target surface heating power can be defined by a total electric power of the heating track divided by a surface to be heated of the rim located opposite the heating track and delimited by an outer perimeter of the track of heating.
- the specific zone can have an area of between 100 mm 2 and 80 mm 2 , and preferably between 50 mm 2 and 25 mm 2 .
- a small area is easy to accommodate in a groove.
- the specific area heating power in the specific zone can be different from the target area heating power by 30% at the minimum, and preferably 40% at the minimum.
- the part of the flexible heating device housed in the groove and comprising a portion of the surface track can have at least one specific zone in which the heating track is tortuous.
- the tortuous zones or in bends or curves
- the shortest that is, on the side of the radius of curvature.
- the surface track in said specific zone housed in the groove can comprise at least one curvature of the heating track greater than 90 ° and preferably greater than 150 °.
- the Applicant has noticed that the phenomenon of concentration of the current and of the heating on the side of the radius of curvature was noticeable beyond these values of curvature.
- the surface track in said specific zone housed in the groove can comprise two curvatures of the heating track greater than 90 ° and preferably greater than 150 ° and facing each other. It is advantageous to lodge these areas in the throat, as the Specific heating powers "add up” and these areas are also more difficult to keep taut: any folds will also be lodged in the throat.
- the part of the flexible heating device housed in the groove can comprise a portion where a surface density of the heating track can be greater than an average surface density of the heating track.
- the surface density of the heating track in said at least part of said at least one specific zone can be greater than the average surface density of the heating track by at least 20%.
- the part of the flexible heating device housed in the groove can comprise a specific zone in which a distance between two portions of the heating track can be less than an average distance between portions of the heating track.
- the distance between two portions of the heating track in said at least part of said at least one specific zone arranged in the groove may be less than the average distance between portions of the heating track by at least 20% .
- the covering sheath may comprise at least two parts interconnected by a seam leaving the edges of the two parts free on a reverse side of the covering sheath, and the seam and / or the edges may be at less partially arranged in said groove of the body of the rim.
- the groove is also used to receive free edges, which also increases the perceived quality, with a well-stretched covering sheath, without excess thickness.
- the flexible heating device may be in the form of a flexible sheet arranged along the perimeter of the rim, the flexible sheet may have an extra length relative to the perimeter of the rim, and at least one end of the flexible sheet can be folded back on itself and arranged in a groove in the body of the rim.
- the end folded back on itself can comprise a specific zone.
- the covering sheath can comprise four seams oriented in a transverse direction of the rim, each seam leaving free edges of parts of the covering sheath on a reverse side of the covering sheath
- the body of the rim can comprise four transverse grooves each of which at least partially accommodate the seam and / or the edges of each seam
- the heating track can be arranged to define at least four specific zones each facing the seams of the covering sheath, so that each of the four specific zones can be arranged in a groove accommodating the edges and / or a seam.
- the covering sheath can comprise at least one piece of leather, natural or synthetic.
- the vehicle steering wheel can include a frame, said at least one groove is formed in a material overmolded around the frame, or in an attached part of the rim.
- the heating track can be:
- a track deposited or printed on the flexible heating device which may have a width within a range ranging from 2 to 10 mm, and preferably a width of at least 3 mm and more preferably at least 4 or 5 mm, and a thickness within a range of 10 ⁇ m to 150 ⁇ m, preferably 15 ⁇ m to 100 ⁇ m,
- a second aspect of the invention relates to a motor vehicle comprising a vehicle steering wheel according to the first aspect.
- FIG. 1 shows a steering wheel according to the present invention
- FIG. 2 shows part of a flexible heating device for a rim of the steering wheel of FIG. 1;
- FIG. 3 is a sectional detail showing a groove formed in the rim of the steering wheel of FIG. 1, in the direction III-III;
- FIG. 4 is a sectional detail showing another groove made in the rim of the steering wheel of FIG. 1 in direction IV-IV;
- FIG. 5 shows a detail of the heating device of FIG. 2;
- FIG. 6 shows a variant of the steering wheel of Figure 1, with more seams at the rim.
- Figure 1 shows a steering wheel comprising a rim 10, connected to a hub 20 by at least one branch 30.
- the rim 10 is covered by a covering sheath 11 , for example leather or any other decorative or covering material (leatherette, fabric, alcantara ).
- the flexible heating device 12 comprises in particular a flexible sheet 120 on which are deposited several heating tracks 121, connected to a connector 123 so as to be able to be connected to an on-board network of the vehicle.
- the heating tracks 121 are conductive and have a resistance to generate heat by the Joule effect.
- the heating tracks 121 are deposited on the flexible sheet 120, it is for example possible to provide a printing of a conductive ink, or then a chemical etching or even a bonding of adhesive tracks.
- heating tracks 121 flat, of flattened cross section The thickness is typically greater than 15 ⁇ m, and the width is typically between 2mm and 10mm. According to a particular example, it is possible to have a painted conductive track with a minimum thickness of 15 ⁇ m, and a width of 4 mm or 5 mm.
- the heating track can come from a thin conductive fabric, cut and deposited and glued or sewn onto the flexible sheet 120.
- the flexible sheet 120 is electrically insulating, it is possible to provide a fabric or a film of material. plastic.
- Figure 2 shows that the heating tracks 121 are tortuous, and have curves or bends 122.
- Figure 5 shows in detail these curves or bends 122, and the Applicant has noticed that in the curves or bend 122 , the current could preferentially pass "inside the bend", that is to say that the electric current follows the shortest path. As a result, the joule effect is greater in these areas, which can generate hot spots.
- these specific areas where the heating tracks 121 are tortuous may be less easy to stretch so as to have no folds, or more fragile to stretch.
- the invention proposes to house at least part of the flexible heating device 12 in a groove A, B or C of the body of the rim 10. This makes it possible to move away from the outer surface of the sheath of 'dressing 11 areas which may generate hot spots, or which may be less easy to strain.
- three grooves A, B and C are provided here, but we can consider providing more or less.
- the grooves A, B and C are provided at precise locations to accommodate the areas of the flexible heating device 12 in which the heating tracks 121 are tortuous (grooves A and B), or else where there may be an extra length to be bent (groove C).
- FIG. 3 shows a partial section of the rim 10, at the level of the line III-III of Figure 1, positioned on the groove C.
- the rim 10 is therefore covered by the covering sheath 11, the rim 10 comprises a frame 15, overmolded with an overmolding material 13 (for example polyurethane), in which is provided the groove C, reference 14.
- FIG. 3 shows the flexible heating device 12 interposed between the covering sheath 11 and the overmolding material 13, and a fold is formed in the reference groove C 14, in order to move away from the covering sheath 11 the tortuous zones of the tracks 121, visible at the top of FIG. 2.
- it does not there will be no hot spot, and no extra thickness that the driver could notice at the level of the covering sheath 11, which guarantees a good perceived quality.
- Figure 4 shows a partial section of the rim 10, at the level of line IV-IV of Figure 1, positioned on the groove B.
- FIG. 4 shows the flexible heating device 12 interposed between the covering sheath 11 and the overmolding material 13, and a fold is formed in the groove Reference B 14.
- a seam is also provided in the covering sheath 11 to unite two parts together, and provision is also made to accommodate at least partially the free edges of these parts in the reference groove B 14.
- reference groove B 14 can accommodate the ply or plies of the flexible heating device 12, and the seam of the covering sheath 11, or the free edges.
- Figure 6 shows an example of a steering wheel similar to that of Figure 1, but comprising four grooves A, B, C and D, with a seam of the covering sheath 11 facing each time and free edges partially housed in the grooves A, B, C, D of reference 14, as shown in the section of Figure 4.
- grooves are shown, but there may be more or less than this number. It is also possible to provide grooves oriented in the tangential direction of the rim, or even in the branches.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022542463A JP7451724B2 (ja) | 2020-01-16 | 2021-01-11 | 加熱デバイスを有する乗物用ステアリングホイール |
DE112021000310.0T DE112021000310T5 (de) | 2020-01-16 | 2021-01-11 | Lenkrad mit heizvorrichtung |
US17/758,945 US20230219613A1 (en) | 2020-01-16 | 2021-01-11 | Vehicle steering wheel with heating device |
CN202180010015.4A CN115038631A (zh) | 2020-01-16 | 2021-01-11 | 带加热装置的车辆方向盘 |
KR1020227027895A KR20220123307A (ko) | 2020-01-16 | 2021-01-11 | 가열 장치를 갖는 차량 스티어링 휠 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2000398A FR3106326B1 (fr) | 2020-01-16 | 2020-01-16 | Volant de véhicule avec dispositif de chauffage |
FRFR2000398 | 2020-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021144214A1 true WO2021144214A1 (fr) | 2021-07-22 |
Family
ID=71575428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/050351 WO2021144214A1 (fr) | 2020-01-16 | 2021-01-11 | Volant de véhicule avec dispositif de chauffage |
Country Status (7)
Country | Link |
---|---|
US (1) | US20230219613A1 (fr) |
JP (1) | JP7451724B2 (fr) |
KR (1) | KR20220123307A (fr) |
CN (1) | CN115038631A (fr) |
DE (1) | DE112021000310T5 (fr) |
FR (1) | FR3106326B1 (fr) |
WO (1) | WO2021144214A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023105693A (ja) * | 2022-01-19 | 2023-07-31 | 株式会社東海理化電機製作所 | ステアリング |
CN115716500B (zh) * | 2023-01-10 | 2023-04-07 | 深圳曦华科技有限公司 | 车辆赛道模式中方向盘智能加热方法及装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6838647B2 (en) | 2001-05-29 | 2005-01-04 | W.E.T. Automotive Systems Ag | Flexible heating element |
DE102004053634A1 (de) | 2004-11-02 | 2006-05-04 | Takata-Petri Ag | Beheizbares Lenkrad für ein Kraftfahrzeug |
US7741581B2 (en) | 2004-09-30 | 2010-06-22 | Trw Automotive Safety Systems Gmbh | Heatable steering wheel |
FR3061890A1 (fr) | 2017-01-19 | 2018-07-20 | Autoliv Development Ab | Procede et dispositif de chauffage d'un organe de vehicule |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100999246B1 (ko) | 2008-09-02 | 2010-12-07 | 현대자동차주식회사 | 차량용 스티어링 휠의 림 |
JP5115427B2 (ja) * | 2008-09-25 | 2013-01-09 | 豊田合成株式会社 | ステアリングホイール |
US20170079089A1 (en) * | 2014-06-06 | 2017-03-16 | Panasonic Intellectual Property Management Co., Ltd. | Electrostatic grip detection device |
JP2019196114A (ja) * | 2018-05-10 | 2019-11-14 | 株式会社東海理化電機製作所 | ステアリングホイール |
-
2020
- 2020-01-16 FR FR2000398A patent/FR3106326B1/fr active Active
-
2021
- 2021-01-11 JP JP2022542463A patent/JP7451724B2/ja active Active
- 2021-01-11 CN CN202180010015.4A patent/CN115038631A/zh active Pending
- 2021-01-11 KR KR1020227027895A patent/KR20220123307A/ko unknown
- 2021-01-11 US US17/758,945 patent/US20230219613A1/en active Pending
- 2021-01-11 WO PCT/EP2021/050351 patent/WO2021144214A1/fr active Application Filing
- 2021-01-11 DE DE112021000310.0T patent/DE112021000310T5/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6838647B2 (en) | 2001-05-29 | 2005-01-04 | W.E.T. Automotive Systems Ag | Flexible heating element |
US7741581B2 (en) | 2004-09-30 | 2010-06-22 | Trw Automotive Safety Systems Gmbh | Heatable steering wheel |
DE102004053634A1 (de) | 2004-11-02 | 2006-05-04 | Takata-Petri Ag | Beheizbares Lenkrad für ein Kraftfahrzeug |
FR3061890A1 (fr) | 2017-01-19 | 2018-07-20 | Autoliv Development Ab | Procede et dispositif de chauffage d'un organe de vehicule |
Also Published As
Publication number | Publication date |
---|---|
JP7451724B2 (ja) | 2024-03-18 |
FR3106326A1 (fr) | 2021-07-23 |
CN115038631A (zh) | 2022-09-09 |
JP2023510547A (ja) | 2023-03-14 |
KR20220123307A (ko) | 2022-09-06 |
US20230219613A1 (en) | 2023-07-13 |
FR3106326B1 (fr) | 2022-09-16 |
DE112021000310T5 (de) | 2022-10-27 |
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