WO2015036329A1 - Dispositif d'entraînement linéaire et soupape de commande de recirculation de gaz d'échappement - Google Patents

Dispositif d'entraînement linéaire et soupape de commande de recirculation de gaz d'échappement Download PDF

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Publication number
WO2015036329A1
WO2015036329A1 PCT/EP2014/068954 EP2014068954W WO2015036329A1 WO 2015036329 A1 WO2015036329 A1 WO 2015036329A1 EP 2014068954 W EP2014068954 W EP 2014068954W WO 2015036329 A1 WO2015036329 A1 WO 2015036329A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive device
linear drive
transmission gear
wheel shaft
groove
Prior art date
Application number
PCT/EP2014/068954
Other languages
English (en)
Inventor
Xiangguang CAO
Longsheng ZHAO
Xiaolin DU
Jingjing SONG
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2015036329A1 publication Critical patent/WO2015036329A1/fr

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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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
    • 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
    • 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
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • 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
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • 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
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52408—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a lift valve
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • 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
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/48—EGR valve position sensors

Definitions

  • the present invention relates to a linear drive device, in particular a linear drive device for an exhaust gas recirculation control valve and a corresponding exhaust gas recirculation control valve.
  • valve devices which can be precisely controlled are often required, for instance exhaust gas recirculation control valves for use in engine exhaust gas recirculation systems.
  • linear drive devices which can be precisely controlled and should preferably be as lightweight and compact as possible are re- quired.
  • the technical problem to be solved by the present invention is to propose a linear drive device and an exhaust gas recirculation control valve, which at least overcome the above shortcomings.
  • a linear drive device comprising an electric motor, a speed reduction transmission stage and a linear transmission stage.
  • the speed reduction transmission stage comprises a small gear connected securely to an output shaft of the electric motor, and a transmission gear meshed with the small gear.
  • the linear transmission stage converts rotational motion of the trans ⁇ mission gear to linear motion of an output connecting rod, the output connecting rod being received in a sleeve and so only able to move in a straight line.
  • a spiral groove is provided on the transmission gear, with a follower capable of moving in the groove being received in the groove, the follower being connected to the output connecting rod.
  • the transmission gear is a sector gear.
  • a shape-matched structure exists between the transmission gear and a housing for enclosing the linear drive device.
  • the shape-matched structure comprises a pin fixed to the transmission gear, the pin co ⁇ operating with a limiting boss on the housing to act as a mechanical stop position.
  • the groove is in the shape of an involute.
  • Fur ⁇ thermore preferably, the center of the groove coincides with the center of the transmission gear.
  • the angle through which the groove extends in the circumferential direction of the transmission gear is 90 degrees to 320 degrees, and more preferably 180 degrees to 320 degrees.
  • the sector size of the sector gear is precisely adapted to the length of the spiral groove.
  • the linear drive device comprises a reset system for non-electrical resetting, the reset system comprising a spring which applies a resetting action to the transmission gear directly or indirectly, for example a torsion spring or a spiral spring.
  • the reset system further comprises a wheel shaft connected securely to the transmission gear, and the spring is a spiral spring fixed to the wheel shaft. The spiral spring has one end fixed to the housing, and another end fixed directly or indirectly to the wheel shaft.
  • the spiral spring in an initial position of the linear drive device, the spiral spring is in a pre-tensioned state and applies a restoring torque to the wheel shaft.
  • a spring bushing is used to fix the spiral spring to the wheel shaft, the spring bushing being fixed to the wheel shaft in such a way as to surround the wheel shaft and having a slot in which the other end of the spiral spring is received.
  • the wheel shaft and spring bushing are made as a single piece.
  • the wheel shaft has a non-circular cross section at least locally, preferably a D-shaped cross section.
  • the linear drive device comprises a sensor for detecting the position of the output connecting rod.
  • the sensor preferably comprises an inductive sensor, a Hall sensor, a magnetoresistive sensor or a contact sensor .
  • the linear drive device comprises a sealing system for enclosing.
  • the present invention also provides an exhaust gas recirculation control valve for use in an engine exhaust gas recirculation circuit, the exhaust gas recirculation control valve comprising a linear drive device according to the present invention.
  • Fig. 1 shows a three-dimensional drawing of a preferred em ⁇ bodiment of the linear drive device according to the present invention.
  • Fig. 2 shows another three-dimensional drawing of a preferred embodiment of the linear drive device according to the present invention, in which the external housing is not shown .
  • Fig. 3 shows a sectional view of a preferred embodiment of the linear drive device according to the present invention.
  • Fig. 4 shows a front view of a transmission gear together with a follower received in a groove thereof according to the present invention.
  • Fig. 5 shows a sectional view of an output assembly comprising an output connecting rod and a follower.
  • Fig. 6 shows a front view of a sector gear.
  • Fig. 7 shows a three-dimensional drawing of a spiral spring together with a wheel shaft.
  • Fig. 8 shows a front view of a spiral spring together with a wheel shaft.
  • linear drive device is explained below using a linear drive device for an exhaust gas recirculation control valve for engine exhaust gas recirculation as an example, but the present invention is by no means limited to this.
  • the linear drive device according to the present invention can be used for any apparatus which requires small, precise, linear control, such as actuators and valves of various types.
  • Figs. 1 - 3 show a preferred embodiment of the linear drive device according to the present invention.
  • the linear drive device 1 comprises an electric motor 2, a first transmission stage (a speed reduction transmission stage) and a second transmission stage (a linear transmission stage) .
  • the linear drive device realizes linear motion of an output con- necting rod 7 by means of the driving action of the electric motor 2.
  • a housing 11 and a corresponding sealing system are provided.
  • the first transmission stage i.e. the speed reduction transmission stage, comprises a small gear 5 connected securely to an output shaft of the electric motor, and a transmission gear 6 meshed with the small gear 5.
  • the electric motor 2 turns the small gear 5, and thereby turns the transmission gear 6 meshed with the small gear 5.
  • the second transmission stage is a linear transmission stage which converts rotational motion of the transmission gear 6 to linear motion of the output connecting rod 7.
  • the second transmission stage comprises a spiral groove 8 formed on the transmission gear 6, a follower 9 received in the groove 8, and the output connecting rod 7 which is connected securely to the follower 9.
  • the spiral groove 8 is for example in the shape of an involute.
  • the center of the spiral groove 8 coincides with the center of the transmission gear 6. Since the arc length rotated by the spiral groove 8 in one stroke of the linear transmission stage's motion may be very large, the pressure angle between the groove 8 and the linear transmission stage is reduced. For a fixed component of transmitted force required in the linear motion direction, a reduction in the pressure angle results in an increase in the cosine thereof, and in turn reduces the transmitted force between the groove 8 and the linear trans ⁇ mission stage. Therefore the angle through which the spiral groove 8 extends in the circumferential direction of the transmission gear 6 is 90 degrees to 320 degrees, preferably 90 degrees to 300 degrees, and more preferably 180 degrees to 300 degrees.
  • the follower 9 may comprise a roller or a roller bearing or a sliding bearing.
  • the follower 9 comprises a ball bearing as shown in Fig. 4. Frictional losses are reduced through the use of a ball bearing, improving efficiency.
  • the follower 9 comprises a ball bearing 91 and a shaft 92, the ball bearing 91 being supported in the groove 8 of the transmission gear 6 and being capable of rolling along the groove, while the shaft 92 has one end connected to an inner ring of the ball bearing 91 and another end supported in a connector 17.
  • Fig. 5 shows an output assembly comprising the follower 9 and the output connecting rod 7, wherein the output connecting rod is connected to the shaft 92 of the follower 9 by means of the connector 17.
  • the output connecting rod 7 is disposed in a sleeve 10 and is therefore only able to move in a straight line up or down (see Fig. 3) .
  • the follower 9 is displaced along the groove 8, and owing to the spiral shape of the groove 8, the follower 9 moves up or down, thereby driving the output connecting rod 7 in upward or downward movement.
  • the transmission gear 6 is a sector gear. With the unused part left out, material is saved and assembly is more convenient.
  • a shape-matched structure exists between the transmission gear 6 and the housing 11 for enclosing the linear drive device.
  • a pin 12 is fixed to the transmission gear 6 (see Fig. 4) ; the pin matches a limiting boss (not shown) on the housing 11 and can act as a mechanical stop position, to prevent the follower 9 from falling out of the groove
  • the sector size of the sector gear is precisely adapted to the length of the spiral groove 8. That is to say, the whole of the sector can be used for transmission.
  • the linear drive device preferably further comprises a reset system as shown in Figs.
  • the reset system comprises a wheel shaft 13 for supporting the transmission gear 6 and a spring.
  • the spring may be a torsion spring (such as a spiral torsion spring or a torsion bar spring) .
  • the spring may be a spiral spring 14 fixed to the wheel shaft 13 as shown in the figures.
  • the wheel shaft 13 is mounted at both ends on the housing 11 by means of bearings.
  • the wheel shaft 13 and transmission gear 6 are connected in such a way that they cannot rotate relative to one another.
  • the spiral spring 14 has one end fixed to the housing 11 of the device, and another end fixed directly or indirectly to the wheel shaft 13.
  • the spiral spring 14 When assembly is complete, the spiral spring 14 is in a pre-tensioned state and applies a torque to the wheel shaft 13 when the drive device is in its initial position, so that the linear transmission stage exhibits a tendency to move upwards. Since the spring is already in a pre-tensioned state in the initial position, the pre-tensioning force of the spring is greater when the valve opens to its maximum position.
  • the use of the spiral spring 14 allows the restoring force to be increased while saving space, with convenient fixing.
  • a spring bushing 15 may be used to fix the spiral spring 14 to the wheel shaft 13.
  • the spring bushing 15 is fixed to the wheel shaft 13 in such a way as to surround the wheel shaft 13, and has a slot 16 in which an end of the spiral spring 14 is received. Such a solution makes fixing of the spring more convenient and allows force to be transmitted more effectively onto the wheel shaft 13.
  • the wheel shaft 13 and the spring bushing 15 may also be made as a single piece, so that the spring is connected to the wheel shaft 13 directly.
  • ac ⁇ complishing a connection by providing the slot 16, which is for receiving an end of the spiral spring 14, directly in the wheel shaft 13.
  • the spiral spring may have inner ring rotation or outer ring rotation.
  • the wheel shaft 13 has a non-circular cross section at least locally, for instance a D-shaped cross section as shown in Figs. 7 and 8, or another shape such as a square.
  • This design allows the connection of the wheel shaft 13 to the transmission gear 6 in such a way that they cannot rotate relative to one another to be accomplished easily, by providing a corresponding through-hole of a matching shape in the trans ⁇ mission gear 6.
  • the linear drive device 1 may comprise a sensor (not shown) for detecting the position of the connecting rod.
  • the sensor may be an inductive sensor, a Hall sensor, a magnetoresistive sensor or a contact sensor. These sensors may be disposed at different positions, and different types of motion can be detected de ⁇ pending on the type of sensor. 1 Q
  • the linear drive device 1 may be used in a valve device, in particular an exhaust gas recirculation control valve in an engine exhaust gas recirculation system.
  • Engine exhaust gas recirculation systems are well known.
  • an exhaust gas recirculation control valve is used in an exhaust gas recirculation pipeline to control the volume of recirculated exhaust gas.
  • the output connecting rod 7 of the linear drive device is connected to a valve head 3; when the output connecting rod 7 moves, it drives movement of the valve head 3 and thereby changes the distance between the valve head and a valve seat (not shown) , and in this way achieves adjustment of the valve.
  • the electric motor 2 of the linear drive device 1 of the exhaust gas recirculation control valve is controlled, and drives the valve head 3 in upwards or downwards movement by means of the output connecting rod 7 of the linear drive device, thereby closing or opening the valve.
  • the fact that the spring is pre-tensioned means that the spring force acts on the wheel shaft 13 and makes the wheel shaft 13 turn, thereby turning the transmission gear 6; the groove 8 in the transmission gear

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

La présente invention concerne un dispositif d'entraînement linéaire, comprenant : • un moteur électrique (2); • un étage de transmission de réduction de vitesse comprenant un petit engrenage (5) relié solidement à un arbre de sortie du moteur électrique et un engrenage de transmission (6) engrené avec le petit engrenage; • un étage de transmission linéaire qui convertit le mouvement de rotation de l'engrenage de transmission en mouvement linéaire d'une bielle de sortie (7), la bielle de sortie étant reçue dans un manchon (10) et ne pouvant ainsi se déplacer qu'en ligne droite; • une rainure en spirale (8) est ménagée sur l'engrenage de transmission, un suiveur (9) susceptible de se déplacer dans la rainure étant reçu dans la rainure, le suiveur étant relié à la bielle de sortie.
PCT/EP2014/068954 2013-09-10 2014-09-05 Dispositif d'entraînement linéaire et soupape de commande de recirculation de gaz d'échappement WO2015036329A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201320559862.9 2013-09-10
CN201320559862.9U CN203442281U (zh) 2013-09-10 2013-09-10 直线驱动装置和排气再循环控制阀

Publications (1)

Publication Number Publication Date
WO2015036329A1 true WO2015036329A1 (fr) 2015-03-19

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Country Status (2)

Country Link
CN (1) CN203442281U (fr)
WO (1) WO2015036329A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017162672A1 (fr) * 2016-03-22 2017-09-28 Continental Automotive Gmbh Appareil d'entraînement linéaire

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204212877U (zh) 2014-11-10 2015-03-18 大陆汽车电子(芜湖)有限公司 密封系统及包括该密封系统的废气再循环阀
CN104455678A (zh) * 2014-11-28 2015-03-25 长城汽车股份有限公司 Egr阀驱动机构
CN204459364U (zh) * 2014-12-04 2015-07-08 大陆汽车电子(芜湖)有限公司 传感器、直线驱动装置、排气再循环控制阀及发动机
KR101875542B1 (ko) * 2016-06-18 2018-07-06 캄텍주식회사 모터 고정 플레이트를 구비하는 차량용 egr 밸브
CN107725223A (zh) * 2016-08-12 2018-02-23 大陆汽车电子(芜湖)有限公司 线性废气控制阀
CN107725224A (zh) * 2016-08-12 2018-02-23 大陆汽车电子(芜湖)有限公司 线性废气控制阀
CN107781450B (zh) * 2017-12-19 2023-12-15 苏州咖博士咖啡系统科技有限公司 一种夹管阀装置

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DE102006031028A1 (de) * 2006-07-05 2008-01-10 Gustav Wahler Gmbh U. Co. Kg Betätigungseinrichtung eines Ventils, insbesondere eines Abasrückführventil
CN201747485U (zh) * 2010-08-17 2011-02-16 无锡隆盛科技有限公司 一种电动egr阀
CN202561210U (zh) * 2012-05-11 2012-11-28 大陆汽车电子(芜湖)有限公司 线性驱动装置及包含该线性驱动装置的发动机
DE102012106281A1 (de) * 2011-07-14 2013-01-17 Stiwa Holding Gmbh Stellvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031028A1 (de) * 2006-07-05 2008-01-10 Gustav Wahler Gmbh U. Co. Kg Betätigungseinrichtung eines Ventils, insbesondere eines Abasrückführventil
CN201747485U (zh) * 2010-08-17 2011-02-16 无锡隆盛科技有限公司 一种电动egr阀
DE102012106281A1 (de) * 2011-07-14 2013-01-17 Stiwa Holding Gmbh Stellvorrichtung
CN202561210U (zh) * 2012-05-11 2012-11-28 大陆汽车电子(芜湖)有限公司 线性驱动装置及包含该线性驱动装置的发动机

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017162672A1 (fr) * 2016-03-22 2017-09-28 Continental Automotive Gmbh Appareil d'entraînement linéaire
US10738864B2 (en) 2016-03-22 2020-08-11 Continental Automotive Gmbh Linear drive apparatus

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