(19)
(11) EP 3 244 041 B1

(12) EUROPEAN PATENT SPECIFICATION

(45) Mention of the grant of the patent:
12.07.2023 Bulletin 2023/28

(21) Application number: 17169845.9

(22) Date of filing: 08.05.2017
(51) International Patent Classification (IPC): 
F02D 9/10(2006.01)
F02D 11/10(2006.01)
(52) Cooperative Patent Classification (CPC):
F02D 9/10; F02D 9/1035; F02D 9/1075; F02D 9/108; F02D 11/10

(54)

THROTTLE

DROSSEL

PAPILLON DES GAZ


(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 12.05.2016 CN 201620433790 U

(43) Date of publication of application:
15.11.2017 Bulletin 2017/46

(73) Proprietor: Vitesco Technologies GmbH
93055 Regensburg (DE)

(72) Inventors:
  • Zhu, Wei
    Jinghu Zone / Wuhu, 241004 (CN)
  • Wang, Qin
    Dangtu, 243100 (CN)
  • Cheng, Dong
    Jiu Jiang Zone, 241009 (CN)

(74) Representative: Vitesco Technologies 
Landsberger Str. 187, Haus D
80687 München
80687 München (DE)


(56) References cited: : 
DE-A1-102011 085 048
DE-A1-102013 101 938
US-A1- 2009 205 611
DE-A1-102012 202 507
JP-A- 2007 278 123
US-A1- 2014 261 307
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present device relates to a motor vehicle spare part product, in particular to a throttle for use in a motor vehicle motive power assembly.

    Background Art



    [0002] A throttle device is generally provided in an internal combustion engine, arranged upstream of the air intake manifold and in communication with the air intake pipeline. It is used to control the flow rate of air supplied to the air intake manifold, and thereby control the flow rate of air entering the engine cylinders.

    [0003] A throttle in common use on the market at present comprises a throttle housing, an electric machine located inside the throttle housing, a torque transfer apparatus meshed with an output end of the electric machine, a throttle shaft connected in a fixed manner to the torque transfer apparatus, a butterfly valve mounted on the throttle shaft and located inside a throttle throat, and a cover mated with the throttle housing. The throttle housing has a chamber for accommodating the electric machine, the chamber being located on one side of the throttle throat.

    [0004] The following drawbacks are associated with having the electric machine installed in the throttle housing: 1) Since the housing material is metal, generally an aluminum alloy, a considerable amount of aluminum alloy must be consumed to form the chamber which accommodates the electric machine, so material costs are high. 2) To install the electric machine in the housing, it is necessary to machine the housing to form the chamber and screw holes for fixing the electric machine, so processing costs are high. 3) The chamber is located at one side of the throttle throat, making the transverse dimension of the throttle large, so that specific space demands cannot be met.

    [0005] US 2014/261307 A1 relates to an engine intake control apparatus. A cover is made of synthetic resin, a motor support plate is made of metal.

    SUMMARY OF THE INVENTION



    [0006] The object of the present device is to provide a throttle capable of reducing manufacturing costs effectively.

    [0007] The invention relates to a throttle with the features of claim 1.

    [0008] The throttle provided by the present device comprises: a housing, having a throttle throat; a cover mated with the housing, the material of the cover being plastic; an electric machine; a torque transfer apparatus meshed with an output end of the electric machine; a throttle shaft connected in a fixed manner to the torque transfer apparatus, the throttle shaft passing through the throttle throat, and being supported by being inserted into a first mounting hole and a second mounting hole in the throttle housing; a butterfly valve mounted on the throttle shaft and located inside the throttle throat; the electric machine being located in the cover. Preferably, the cover has a body and a chamber which is formed as an extension from the body and used for accommodating the electric machine, the electric machine being mounted in the chamber by means of screws.

    [0009] An inside wall of the chamber is provided with a ridge which presses against the electric machine.

    [0010] Preferably, the electric machine has a top; a wave washer and a flat washer are provided between the top and a top wall of the chamber; the wave washer presses against the top end of the electric machine, and the flat washer is located between the wave washer and the top wall of the chamber.

    [0011] Preferably, an outside wall of the chamber is provided with a rib extending to the body.

    [0012] Preferably, the electric machine is fixed in the chamber by means of glue.

    [0013] Preferably, the electric machine is fixed in the cover by injection molding.

    [0014] Preferably, thermally conductive adhesive is provided between the housing and the cover.

    [0015] Preferably, the torque transfer apparatus is two-stage transmission, comprising a first gear and a second gear meshed with each other, the first gear being mounted on an axle and meshed with the output end of the electric machine, and the second gear being connected in a fixed manner to the throttle shaft.

    [0016] Preferably, the torque transfer apparatus is one-stage transmission; the torque transfer apparatus is a single gear connected in a fixed manner to the throttle shaft, with the gear being meshed with the output end of the electric machine.

    [0017] Compared with the prior art, since the electric machine is located in the plastic cover, there is no need for a chamber for accommodating the electric machine to be provided in the housing made of metal material, so material costs are reduced, and there is no need for the chamber and screw holes for fixing the electric machine to be formed in the cover by machining, so processing costs are reduced.

    Description of the accompanying drawings



    [0018] The accompanying drawings, which form part of the present application, are used to furnish further understanding of the present device. The schematic embodiments of the present device and the explanations thereof are intended to explain the present device, without constituting an inappropriate limitation thereof.

    [0019] Drawings:

    Fig. 1 is a schematic perspective view of the throttle of the present device after assembly;

    Fig. 2 is a schematic sectional view of the throttle of the present device after assembly;

    Fig. 3 is an enlarged schematic view of part A of the throttle shown in Fig. 2;

    Fig. 4 is a schematic perspective view of the cover of the throttle shown in Fig. 1;

    Fig. 5 is a schematic perspective view of another embodiment of the throttle of the present device, wherein the cover has been removed.


    PARTICULAR EMBODIMENTS



    [0020] Referring to Figs. 1 and 2, the throttle comprises: a housing 1, the material thereof being metal, and the housing 1 having a throttle throat; a cover 8 mated with the housing 1, the material of the cover 8 being plastic, and an electric machine 2 located in the cover 8; a torque transfer apparatus 3 meshed with an output end 20 of the electric machine 2; a throttle shaft 4 connected in a fixed manner to the torque transfer apparatus 3, the throttle shaft 4 passing through the throttle throat, and being supported by being inserted into a first mounting hole (not shown in the figures) and a second mounting hole (not shown in the figures) in the housing 1; and a butterfly valve 5 mounted on the throttle shaft 4 and located inside the throttle throat.

    [0021] Since the electric machine 2 is located in the cover 8, there is no need for a chamber for accommodating the electric machine 2 to be provided in the housing 1 made of metal material, so material costs are reduced. Furthermore, the cover 8 may be injection molded first, wherein the cover 8 has a body 81, a chamber 82 which is formed as an extension from the body 81 and used for accommodating the electric machine 2, and screw holes (not shown in the figures) for fixing the electric machine, and then the electric machine 2 may be fixed in the chamber 82 by means of screws. Thus, there is no need for the chamber 82 and screw holes for fixing the electric machine 2 to be formed in the cover 8 by machining; injection molding may be used, so processing costs are reduced. Referring to Fig. 4, and according to the invention, ridges 821 are provided on an inside wall of the chamber 82; the ridges 821 press against the electric machine 2, thereby avoiding transverse vibration of the electric machine 2 during operation, and at the same time helping to dissipate heat. Referring to Fig. 3, the electric machine 2 has a top 21; a wave washer 6 and a flat washer 7 are provided between the top 21 and a top wall 822 of the chamber 82. The wave washer 6 presses against the top 21 of the electric machine 2, thereby reducing axial vibration of the electric machine 2; the flat washer 7 is located between the wave washer 6 and the top wall 822 of the chamber 82, to prevent stress caused by the wave washer 6 from damaging the cover 8. An outside wall of the chamber 82 is provided with ribs 823 which extend to the body 81; the ribs can increase the rigidity of the cover 8, reduce transverse deformation, and thereby reduce transverse vibration of the electric machine 2. To dissipate heat better, a thermally conductive adhesive may be provided between the housing 1 and the cover 8.

    [0022] Referring to Fig. 2, the torque transfer apparatus 3 is two-stage transmission, comprising a first gear 31 and a second gear 32 meshed with each other, the first gear 31 being mounted on an axle and meshed with the output end 20 of the electric machine 2, and the second gear 32 being connected in a fixed manner to the throttle shaft 4. The throttle also comprises a return spring 12 with two ends fixed to the housing 1 and the second gear 32 respectively. The return spring 12 is mounted on the housing 1 and second gear 32 with a certain preload. Due to the action of the preload, one end of the return spring 12 will pull the second gear 12 and fix it to the housing 1; this position is an initial position of the second gear 32. When a break in current is encountered, under the action of the preload the return spring 12 can pull the second gear 32 to rotate, thereby impelling the throttle shaft 4 to rotate and pull the butterfly valve 5 back to an initial position.

    [0023] Referring to Figs. 1 and 4, the cover 8 has an electrical connection port 84 and a position sensor 86 located therein. The position sensor 86 senses a rotation angle of the butterfly valve 5 through a change in a magnetic field of a magnet (not shown in the figures), and provides feedback to an electronic control unit.

    [0024] Referring to Fig. 5, optionally, the torque transfer apparatus 3 is one-stage transmission; the torque transfer apparatus 3 is a single gear 30 connected in a fixed manner to the throttle shaft 4, with the gear 30 being meshed with the output end 20 of the electric machine 2, and at the same time being connected in a fixed manner to the throttle shaft 4. In this embodiment, the gear 30 is meshed internally with the output end 20 of the electric machine 2, but could also be meshed externally. Thus the number of components is small, the assembly process is more simple, and the space occupied is smaller.

    [0025] Optionally, after the cover 8 has been injection molded, the electric machine 2 is fixed in the chamber by means of glue. The electric machine 2 could also be fixed in the cover 8 directly by injection molding. These two methods of fixing the electric machine solve the problems of vibration and heat dissipation very well.


    Claims

    1. A throttle, comprising:

    a housing (1), having a throttle throat;

    a cover (8) mated with the housing, the material of the cover being plastic;

    an electric machine (2);

    a torque transfer apparatus (3) meshed with an output end (20) of the electric machine;

    a throttle shaft (4) connected in a fixed manner to the torque transfer apparatus, the throttle shaft passing through the throttle throat, and being supported by being inserted into a first mounting hole and a second mounting hole in the throttle housing;

    a butterfly valve (5) mounted on the throttle shaft and located inside the throttle throat;

    characterised in that

    the electric machine is located in a chamber (82) of the cover and an inside wall of the chamber is provided with ridges (821) which press against the electric machine in a transverse direction to damp transverse vibration of the electric machine during operation.


     
    2. The throttle as claimed in claim 1, wherein the cover has a body (81) and the chamber is formed as an extension from the body, the electric machine being mounted in the chamber by means of screws.
     
    3. The throttle as claimed in claim 2, wherein the electric machine has a top (21) ; a wave washer (6) and a flat washer (7) are provided between the top and a top wall (822) of the chamber; the wave washer presses against the top end of the electric machine, and the flat washer is located between the wave washer and the top wall of the chamber.
     
    4. The throttle as claimed in claim 2, wherein an outside wall of the chamber is provided with a rib (823) extending to the body.
     
    5. The throttle as claimed in claim 2, wherein the electric machine is fixed in the chamber by means of glue.
     
    6. The throttle as claimed in claim 1, wherein the electric machine is fixed in the cover by injection molding.
     
    7. The throttle as claimed in claim 1, wherein thermally conductive adhesive is provided between the housing and the cover.
     
    8. The throttle as claimed in any one of claims 1 - 7, wherein the torque transfer apparatus is two-stage transmission, comprising a first gear (31) and a second gear (32) meshed with each other, the first gear being mounted on an axle and meshed with the output end of the electric machine, and the second gear being connected in a fixed manner to the throttle shaft.
     
    9. The throttle as claimed in any one of claims 1 - 7, wherein the torque transfer apparatus is one-stage transmission; the torque transfer apparatus is a single gear (30) connected in a fixed manner to the throttle shaft, with the gear being meshed with the output end of the electric machine.
     


    Ansprüche

    1. Drossel, umfassend:

    ein Gehäuse (1), das einen Drosseldurchlass aufweist;

    eine Abdeckung (8), die mit dem Gehäuse gekoppelt ist, wobei das Material der Abdeckung Kunststoff ist;

    eine elektrische Maschine (2);

    eine Drehmomentübertragungseinrichtung (3), die mit einem Ausgangsende (20) der elektrischen Maschine in Eingriff steht;

    eine Drosselwelle (4), die in einer festen Weise mit der Drehmomentübertragungseinrichtung verbunden ist, wobei die Drosselwelle durch den Drosseldurchlass verläuft und gelagert ist, indem sie in eine erste Montageöffnung und eine zweite Montageöffnung in dem Drosselgehäuse eingesetzt ist;

    eine Drosselklappe (5), die an der Drosselwelle montiert ist und sich in dem Drosseldurchlass befindet;

    dadurch gekennzeichnet, dass

    sich die elektrische Maschine in einer Kammer (82) der Abdeckung befindet und eine Innenwand der Kammer mit Wülsten (821) versehen ist, die in einer Querrichtung gegen die elektrische Maschine drücken, um eine Querschwingung der elektrischen Maschine während eines Betriebs zu dämpfen.


     
    2. Drossel nach Anspruch 1, wobei die Abdeckung einen Körper (81) aufweist und die Kammer als eine Verlängerung von dem Körper ausgebildet ist, wobei die elektrische Maschine in der Kammer mittels Schrauben montiert ist.
     
    3. Drossel nach Anspruch 2, wobei die elektrische Maschine eine Oberseite (21) aufweist; wobei eine Wellenscheibe (6) und eine Beilagscheibe (7) zwischen der Oberseite und einer oberen Wand (822) der Kammer bereitgestellt sind; wobei die Wellenscheibe gegen das obere Ende der elektrischen Maschine drückt und sich die Beilagscheibe zwischen der Wellenscheibe und der oberen Wand der Kammer befindet.
     
    4. Drossel nach Anspruch 2, wobei eine Außenwand der Kammer mit einer Rippe (823) versehen ist, die sich zu dem Körper erstreckt.
     
    5. Drossel nach Anspruch 2, wobei die elektrische Maschine in der Kammer mittels Klebstoff befestigt ist.
     
    6. Drossel nach Anspruch 1, wobei die elektrische Maschine in der Abdeckung durch Spritzgießen befestigt ist.
     
    7. Drossel nach Anspruch 1, wobei ein wärmeleitender Klebstoff zwischen dem Gehäuse und der Abdeckung bereitgestellt ist.
     
    8. Drossel nach einem der Ansprüche 1-7, wobei die Drehmomentübertragungseinrichtung ein zweistufiges Getriebe ist, das ein erstes Zahnrad (31) und ein zweites Zahnrad (32) umfasst, die miteinander in Eingriff stehen, wobei das erste Zahnrad auf einer Achse montiert ist und mit dem Ausgangsende der elektrischen Maschine in Eingriff steht und das zweite Zahnrad in einer festen Weise mit der Drosselwelle verbunden ist.
     
    9. Drossel nach einem der Ansprüche 1-7, wobei die Drehmomentübertragungseinrichtung ein einstufiges Getriebe ist; wobei die Drehmomentübertragungseinrichtung ein einzelnes Zahnrad (30) ist, das in einer festen Weise mit der Drosselwelle verbunden ist, wobei das Zahnrad mit dem Ausgangsende der elektrischen Maschine in Eingriff steht.
     


    Revendications

    1. Papillon des gaz, comprenant :

    un logement (1) ayant un rétrécissement de papillon des gaz ;

    un couvercle (8) accouplé au logement, le matériau du couvercle étant un plastique ;

    une machine électrique (2) ;

    un appareil de transfert de couple (3) engrené avec une extrémité de sortie (20) de la machine électrique ;

    un axe de papillon (4) relié de manière fixe à l'appareil de transfert de couple, l'axe de papillon passant à travers le rétrécissement de pavillon des gaz et étant supporté par son insertion dans un premier trou de montage et un second trou de montage dans le logement du papillon des gaz ;

    un volet obturateur (5) monté sur l'axe de papillon et situé à l'intérieur du rétrécissement de papillon des gaz ;

    caractérisé en ce que

    la machine électrique est située dans une chambre (82) du couvercle et une paroi interne de la chambre est munie de stries (821) qui se pressent contre la machine électrique dans une direction transversale pour amortir des vibrations transversales de la machine électrique pendant son fonctionnement.


     
    2. Papillon des gaz selon la revendication 1, dans lequel le couvercle a un corps (81) et la chambre est formée en tant qu'extension à partir du corps, la machine électrique étant montée dans la chambre au moyen de vis.
     
    3. Papillon des gaz selon la revendication 2, dans lequel la machine électrique a un sommet (21) ; une rondelle ondulée (6) et une rondelle plate (7) sont placées entre le sommet et une paroi supérieure (822) de la chambre ; la rondelle ondulée se presse contre l'extrémité supérieure de la machine électrique, et la rondelle plate est située entre la rondelle ondulée et la paroi supérieure de la chambre.
     
    4. Papillon des gaz selon la revendication 2, dans lequel une paroi extérieure de la chambre est munie d'une nervure (823) s'étendant vers le corps.
     
    5. Papillon des gaz selon la revendication 2, dans lequel la machine électrique est fixée dans la chambre au moyen de colle.
     
    6. Papillon des gaz selon la revendication 1, dans lequel la machine électrique est fixée dans le couvercle par moulage par injection.
     
    7. Papillon des gaz selon la revendication 1, dans lequel un adhésif thermo-conducteur est placé entre le logement et le couvercle.
     
    8. Papillon des gaz selon l'une quelconque des revendications 1 à 7, dans lequel l'appareil de transfert de couple est une transmission à deux étages, comprenant un premier engrenage (31) et un second engrenage (32) engrenés l'un avec l'autre, le premier engrenage étant monté sur un essieu et engrené avec l'extrémité de sortie de la machine électrique, et le second engrenage étant relié de manière fixe à l'axe de papillon.
     
    9. Papillon des gaz selon l'une quelconque des revendications 1 à 7, dans lequel l'appareil de transfert de couple est une transmission à un étage ; l'appareil de transfert de couple est constitué d'un seul engrenage (30) relié de manière fixe à l'axe de papillon, l'engrenage étant engrené avec l'extrémité de sortie de la machine électrique.
     




    Drawing




















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description