EP3807510A1 - Klappenvorrichtung für eine brennkaftmaschine - Google Patents
Klappenvorrichtung für eine brennkaftmaschineInfo
- Publication number
- EP3807510A1 EP3807510A1 EP19729500.9A EP19729500A EP3807510A1 EP 3807510 A1 EP3807510 A1 EP 3807510A1 EP 19729500 A EP19729500 A EP 19729500A EP 3807510 A1 EP3807510 A1 EP 3807510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- flap
- sealing
- flow channel
- shaft
- 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- Withdrawn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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/106—Sealing of the valve shaft in the housing, e.g. details of the bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/72—Housings
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/224—Details of bearings for the axis of rotation
- F16K1/225—Details of bearings for the axis of rotation the axis of rotation having only one bearing
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
- F02M26/54—Rotary actuators, e.g. step motors
Definitions
- the invention relates to a valve device for an internal combustion engine with a flow housing, which delimits a flow channel, a valve body which is rotatably arranged in the flow channel, a valve shaft mounted on one side, to which the valve body is fastened, the valve shaft being drivable by means of an actuator, and a bearing receptacle which is formed on the flow housing, a first bearing and a second bearing being arranged in the bearing receptacle for one-sided mounting of the valve shaft.
- flap devices are known, for example, as throttle valves for regulating the air supply to the internal combustion engine or as exhaust gas recirculation flaps for regulating the amount of exhaust gas returned to the internal combustion engine, the available flow cross section being changed by rotating the flap arranged in the flow housing.
- valve device for example, by EP 0 972 975 B1.
- the valve device has a flow housing with a flow channel, a valve body being arranged in the flow channel.
- the valve body is attached to a valve shaft, which is connected in a rotationally fixed manner to an actuator.
- the flap shaft is supported on one side on the flow housing via two bearings arranged in a bearing receptacle.
- the bearing holder is arranged in an opening formed in the flow housing, the bearing holder not protruding into the flow channel, so that the Flow channel in the area of the bearing mount has a continuous, circular flow cross-section.
- the valve body is fastened to an axial end of the valve shaft which protrudes from the bearing receptacle and extends into the flow channel.
- a disadvantage of a valve device with a valve shaft mounted on one side is that a load acting on the valve body causes a high degree of deflection of the valve shaft, which reduces the service life of the bearings and thus the valve device.
- the invention is therefore based on the object of providing a flap device with a flap shaft mounted on one side, in which the deflection of the flap shaft is reduced under a load acting on the flap body and the service life of the bearings and the flap device is thereby increased.
- a flap device with the features of the main claim.
- the fact that the bearing receptacle projects into the flow channel and the second bearing is arranged within the flow channel reduces the deflection of the valve shaft.
- the amount of deflection and the resulting load on the bearings depend on the axial distance between the central axis of the flow channel and the first bearing.
- the displacement of the first bearing in the flow channel reduces the distance between the central axis of the flow channel and the first bearing, thereby reducing the deflection of the valve shaft. In this way, the load on the bearings caused by the deflection is reduced and the service life of the bearings and thus the flap device is increased.
- the bearing receptacle is preferably sleeve-shaped, with a constriction being formed on the first axial end projecting into the flow channel, against which the first bearing rests and through which the flap shaft projects. This fixes the first bearing in an axial direction. Fixation in the other axial direction is carried out, for example, by a locking ring. In this way, the first bearing is axially fixed simply and inexpensively.
- annular thrust washer is attached to the second axially opposite end of the bearing receptacle, through which the valve shaft protrudes.
- the inner space delimited by the sleeve-shaped bearing receptacle is closed by the thrust washer, so that penetration of moisture and dirt particles from the surroundings into the inner space is prevented and the service life of the bearings arranged in the inner space is increased.
- the bearing receptacle has a sealing device, the sealing device having a contour disk which is fastened to the flap shaft in a fluid-tight manner and an axially mounted sealing disk, a sealing surface of the contour disk abutting a counter-sealing surface of the sealing disk.
- the flap shaft extends through the bearing receptacle and moves relative to it, there is inevitably a gap between the flap shaft and the bearing receptacle, the exhaust gas flowing through the flow channel being able to flow out of the flow housing through the gap.
- the flow device can be reliably sealed by the sealing device and leakage of the exhaust gas through the bearing receptacle can be prevented.
- the sealing disk preferably bears axially on the second bearing.
- the sealing washer is pressed against the second bearing by the contour washer, which is axially resiliently preloaded together with the valve shaft. In this way, the sealing washer can be axially supported simply and inexpensively.
- the sealing surface of the contour disk and the counter-sealing surface of the sealing disk are preferably of conical or frustoconical design.
- the sealing washer is supported radially and axially only by the abutment on the second bearing and by the pressing of the contour washer over the sealing surface. Due to the conical or frustoconical design of the sealing and counter-sealing surface, the sealing washer can align itself radially. In addition, the effective sealing surface is increased by the conical or frustoconical configuration of the sealing and counter-sealing surface, thereby achieving an improved sealing effect.
- the contour disk is connected to the flap shaft via a press connection or a material connection. This creates a fluid-tight connection between the contour disk and the valve shaft, which prevents leakage through the gap between the contour disk and the valve shaft.
- the valve body has a recess corresponding to the contour of a channel-side section of the bearing receptacle projecting into the flow channel, so that the flow channel can be completely closed reliably by the valve body.
- the first bearing is preferably designed to be temperature-resistant, as a result of which the service life of the first bearing is increased and premature failure of the first bearing is prevented due to thermal overload.
- the first bearing can be designed, for example, as a plain bearing, in particular as a ceramic or graphite bearing.
- the actuator is arranged in a separate actuator housing, the actuator housing on the
- Flow housing is attached.
- the actuator can be replaced easily and inexpensively, for example if the actuator's electric motor is damaged
- the bearing housing is designed separately and attached to the flow housing. This allows the bearing device together with the valve shaft in one
- Pre-assembly step are pre-assembled and fixed to the flow housing in a subsequent step. In this way, the assembly of the flap device is simplified.
- a flap device is thus created with a flap shaft mounted on one side, in which the bending moments acting on the shaft are reduced and the service life of the bearings and the flap device is thereby increased.
- Figure 1 shows a perspective view of a valve device according to the invention.
- Figure 2 shows a side view of a valve device according to the invention in a sectional view.
- the figures show a flap device 10, which comprises a flow housing 12, in which a flow channel 14 is formed, the free flow cross section of which by means of a Flap body 16 arranged rotatably in the flow channel 14 can be regulated.
- the valve body 16 is fixedly connected to a valve shaft 18 rotatably mounted in the flow housing 12.
- a pot-shaped lever support 20 is fastened to an axial end of the flap shaft 18 facing away from the flow channel 14 and is rotatably connected to a drive shaft 24 of an actuator 22.
- the lever bracket 20 is attached to the flap shaft 18, for example, by welding
- the actuator 22 is arranged in a separately designed actuator housing 25 fastened to the flow housing 12 and has an electric motor 21 and a transmission 23 interposed between the electric motor 21 and the flap shaft 18.
- the cup-shaped lever support 20 is radially surrounded by a sleeve 26 which extends axially in the direction of the flow housing 12.
- the sleeve 26 serves as a guide for a return spring 30 which radially surrounds the sleeve 26.
- a first spring leg of the return spring 30 bears against a stop formed on the flow housing 12 and a second spring leg bears against a stop formed on the lever bracket 20, so that when the flap shaft 18 rotates, the return spring 30 is preloaded and stored in the return spring 30 Energy is a return of the flap shaft 18 to its starting position without applying any torque by the actuator 22 must become. In this way, a defined fail-safe position of the flap shaft 18 is approached if the actuator 22 fails.
- the flap shaft 18 is rotatably supported by a first bearing 42 and a second bearing 44, which are arranged in a common bearing seat 32. In this way, the valve shaft 18 is supported on one side on the flow housing 12.
- the bearing receptacle 32 is arranged in an opening 13 formed on the flow housing 12 and has a channel-side section 34 and an actuator-side section 36, the channel-side section 34 protruding into the flow channel 14 and the actuator-side section 36 protruding from the flow housing 12.
- the bearing receptacle 32 is designed like a sleeve and, together with a constriction 39 formed on the channel-side section 34 and a thrust washer 48 fastened on the actuator-side section 36, delimits an interior 40.
- the constriction 39 and the thrust washer 48 have a bore through which the flap shaft 18 runs.
- the first bearing 42 and the second bearing 44 are arranged in the interior 40.
- the first bearing 42 is arranged in the channel-side section 34 and thus according to the invention in the flow channel 14.
- Both bearings 42, 44 rest with their outer circumferential surface radially on an inner circumferential surface radially delimiting the inner space 40 of the bearing receptacle 32.
- this abuts the constriction 39 with a first axial end and is secured at the second axial end by a locking ring 46.
- the second bearing 44 rests with one axial end on the thrust washer 48 and with the other axial end on the sealing washer 52 of a sealing device 50, whereby the second bearing 44 is axially secured.
- the sealing device 50 is composed of the sealing washer 52 and a contour washer 54.
- the contour disk 54 is attached to the flap shaft 18 in a material-locking manner or via a press connection and rotates with the flap shaft 18.
- the sealing disk 52 abuts the second bearing 44 with an axial end and with a conical counter-sealing surface against a conical sealing surface of the contour disk 54.
- the sealing effect between the sealing surface and the counter-sealing surface takes place through an axial pressure caused by the return spring 30 between the two sealing surfaces.
- the return spring 30 bears axially with its first turn against an annular, radially extending extension 27 of the sleeve 26 and with its last turn against an annular, radially extending extension 29 of a spring support sleeve 28, the spring support sleeve 28 abutting the flow housing 12 and extends axially in the direction of the sleeve 26.
- an axial spring force acts on the lever carrier 20 and thus on the flap shaft 18 in the direction of the actuator 22, as a result of which the sealing surface of the contour disc 54 is pressed against the counter-sealing surface of the sealing disc 52 and the sealing disc 52 the second bearing 44 is pressed and the second bearing 44 is pressed against the fixed thrust washer 48.
- the flap shaft 18, the contour plate 54, the sealing plate 52 and the second bearing 44 are axially fixed, pressure pulsations and thermal expansion can be compensated for by such a structure.
- the sleeve 26 and the spring support sleeve 28 also serve together with the lever bracket 20 to encapsulate the bearing receptacle 32 to prevent water from entering the bearing receptacle 32 by splashing water.
- an axial gap is provided between the spring support sleeve 28 and the sleeve 26, as a result of which contact between the two sleeves 26, 28 in the event of thermal expansions or when the return spring 30 is contracted is avoided. If the flap device 10 is now exposed to spray water, the majority of the spray water is prevented by the sleeve 26 and the spring support sleeve 28 from penetrating into the storage area.
- the bearing receptacle 32 has a groove 60 with an asymmetrical cross section, so that the water can move without great resistance in the direction of the groove bottom, where it collects.
- the water resistance in the groove base increases the flow resistance and prevents the water from flowing further to the valve shaft 18.
- the exhaust gas flows through the flow channel 14, as a result of which a load acts on the valve body 16 in the longitudinal direction of the flow channel 14 and perpendicular to the axis of rotation of the valve shaft 18.
- This load is transmitted from the valve body 16 to the valve shaft 18, which results in a bending load and thus a bending of the valve shaft 18 due to the acting bending moment.
- a high deflection leads to premature failure of the bearings 42, 44, the deflection increasing with the increasing distance between the central axis of the flow channel 14 and the first bearing 42.
- the bearing receptacle 32 projects into the flow channel 14 and the first bearing 42 is arranged inside the flow channel 14, as a result of which the distance between the central axis of the flow channel 14 and the first bearing 42 is reduced and thereby the deflection of the flap shaft 18 is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lift Valve (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018114360.5A DE102018114360B4 (de) | 2018-06-15 | 2018-06-15 | Klappenvorrichtung für eine Brennkraftmaschine |
| PCT/EP2019/064625 WO2019238490A1 (de) | 2018-06-15 | 2019-06-05 | Klappenvorrichtung für eine brennkaftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3807510A1 true EP3807510A1 (de) | 2021-04-21 |
Family
ID=66810794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19729500.9A Withdrawn EP3807510A1 (de) | 2018-06-15 | 2019-06-05 | Klappenvorrichtung für eine brennkaftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3807510A1 (de) |
| DE (1) | DE102018114360B4 (de) |
| WO (1) | WO2019238490A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3080427B1 (fr) | 2018-04-24 | 2020-04-03 | Faurecia Systemes D'echappement | Vanne pour une ligne d'echappement |
| IT202100004703A1 (it) * | 2021-03-01 | 2022-09-01 | Marelli Europe Spa | Valvola a farfalla motorizzata per un condotto di scarico |
| IT202200004115A1 (it) | 2022-03-04 | 2023-09-04 | Marelli Europe Spa | Valvola a farfalla motorizzata e raffreddata per un condotto di scarico |
| DE102023108001B4 (de) * | 2023-03-29 | 2025-03-06 | Schaeffler Technologies AG & Co. KG | Luftklappeneinheit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0199838A1 (de) * | 1985-04-30 | 1986-11-05 | Asahi Glass Company Ltd. | Drosselklappe zur Steuerung eines Hochtemperaturfluids |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19630164C2 (de) * | 1996-07-26 | 1998-09-03 | Schmitz & Brill Gmbh & Co Kg | Absperrklappe in Abgassystemen von Brennkraftmaschinen |
| JP3116305B2 (ja) * | 1998-02-10 | 2000-12-11 | 日本鋼管株式会社 | 高温高圧流体の流量制御弁及びその弁軸の固着防止方法 |
| US6135415A (en) * | 1998-07-30 | 2000-10-24 | Siemens Canada Limited | Exhaust gas recirculation assembly |
| DE19934113A1 (de) * | 1999-07-21 | 2001-01-25 | Bosch Gmbh Robert | Klappenventil |
| US20020130287A1 (en) * | 2001-03-16 | 2002-09-19 | Smith Craig D. | Noise-suppressive valve assembly and method for use |
| DE202005017593U1 (de) * | 2005-11-10 | 2006-01-12 | Kohlhage Verbindungstechnik Gmbh & Co. Kg | Anordnung einer Klappe in einem Rohrstück |
| DE102011119139A1 (de) * | 2011-11-23 | 2013-05-23 | Gustav Wahler Gmbh U. Co. Kg | Ventil, insbesondere Niederdruckventil, zur Steuerung einer Abgasrückführung |
| DE102014104578B4 (de) * | 2014-04-01 | 2020-02-06 | Pierburg Gmbh | Klappenvorrichtung für eine Verbrennungskraftmaschine |
| DE102014104577B4 (de) * | 2014-04-01 | 2020-02-06 | Pierburg Gmbh | Abgasklappenvorrichtung für eine Verbrennungskraftmaschine |
| DE102014104579B4 (de) * | 2014-04-01 | 2017-05-11 | Pierburg Gmbh | Klappenvorrichtung für eine Verbrennungskraftmaschine |
| DE102014117675B4 (de) * | 2014-12-02 | 2017-10-26 | Pierburg Gmbh | Klappenvorrichtung für eine Verbrennungskraftmaschine |
| DE102014117987B4 (de) * | 2014-12-05 | 2017-10-26 | Pierburg Gmbh | Klappenvorrichtung für eine Verbrennungskraftmaschine |
-
2018
- 2018-06-15 DE DE102018114360.5A patent/DE102018114360B4/de active Active
-
2019
- 2019-06-05 EP EP19729500.9A patent/EP3807510A1/de not_active Withdrawn
- 2019-06-05 WO PCT/EP2019/064625 patent/WO2019238490A1/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0199838A1 (de) * | 1985-04-30 | 1986-11-05 | Asahi Glass Company Ltd. | Drosselklappe zur Steuerung eines Hochtemperaturfluids |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018114360A1 (de) | 2019-12-19 |
| DE102018114360B4 (de) | 2021-03-04 |
| WO2019238490A1 (de) | 2019-12-19 |
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