EP1526272B2 - Soupape de recirculation de gaz d'échappement - Google Patents
Soupape de recirculation de gaz d'échappement Download PDFInfo
- Publication number
- EP1526272B2 EP1526272B2 EP03024509A EP03024509A EP1526272B2 EP 1526272 B2 EP1526272 B2 EP 1526272B2 EP 03024509 A EP03024509 A EP 03024509A EP 03024509 A EP03024509 A EP 03024509A EP 1526272 B2 EP1526272 B2 EP 1526272B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- rotation
- valve
- exhaust gas
- gas recirculation
- 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.)
- Expired - Lifetime
Links
- 238000013461 design Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Images
Classifications
-
- 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
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
Definitions
- the invention relates to an exhaust gas recirculation valve according to the preamble of claim 1.
- valves For exhaust gas recirculation valves, various types of actuation are known to open and close the valve.
- a known principle is to release the valve element, for example a valve plate, from its valve seat by a translatory movement.
- it is from the EP 0 856 657 B1 known to provide a cam which is rotationally driven by a drive, and which is in engagement with a translationally movable valve stem such that the valve stem during a rotational movement of the cam is translationally moved and raised, for example, when opening from its valve seat.
- an exhaust gas recirculation valve according to the preamble of claim 1 is known.
- a rotational movement is transmitted by a suitable transmission device to the valve element, for example a hinged valve disk, which moves in rotation between an open and closed position and vice versa.
- the EP 1 103 715 A1 concerns an exhaust gas recirculation valve in which a valve stem is tilted slightly by a cam member and is moved substantially translationally to realize an opening and closing movement.
- the invention has for its object to provide an exhaust gas recirculation valve with a variety of characteristics for the valve opening and closing mechanism in a simple and compact design.
- the exhaust gas recirculation valve comprises a rotary drive and a valve element which is rotationally actuated between an open and closed position.
- the rotational movement of the rotary drive is suitably transmitted to the valve element such that it also rotates and is moved by a rotational movement between the open and closed positions.
- the term "rotary drive” used is to be understood as meaning any element from which a rotation is transmitted to the valve element by means of the elements explained in greater detail below.
- the rotary drive may be a rotary motor or a gear which is driven by a rotary motor.
- a cam element with a cam curve is provided for the first time, which transmits said rotational movement.
- the cam member may be both the driving and the driven element.
- the cam element in a suitable manner, optionally with the interposition of a transmission, for example with gears, connected to the rotary drive.
- the cam member is suitably driven by the rotary drive and is connected to the valve member so that the generated rotation of the cam member causes rotation of the valve member.
- a roller is provided which cooperates with the cam curve of the cam element in such a way that the described rotations can be generated. As explained in more detail below, the roller, which is attached to a lever, roll on the cam curve.
- the described cam element can, as explained in more detail below, an extremely compact design can be achieved.
- the drive with respect to the valve element and in particular its axis of rotation can be arranged such that it is almost aligned so that little space is needed.
- a variety of characteristics for the valve opening and closing mechanism can be advantageously realized by a cam member. For example, at the beginning of an opening process, a higher force can be applied than in the further course of the opening process.
- other, more elaborate gear forming means such as e.g. Lever mechanisms and gears are avoided. Overall, this results in an improved, simple and compact design of an exhaust gas recirculation valve.
- the angle which covers the cam curve, and which is accordingly passed through when opening can be adjusted in a suitable manner.
- favorable results have been obtained for angles in the range of about 70 ° to 360 °.
- both an over- and a reduction can be achieved in order to achieve certain, explained in more detail below effects.
- the cam curve starting from a closed state of the valve, initially runs flat.
- a rotation of the cam member by a certain angle generates a rotation of the valve member at a smaller angle than the rotational angle of the cam member.
- a translation takes place to the effect that with a comparatively large rotational movement of the rotary drive, a smaller, compared to, rotation of the valve element is generated, and because of the mechanical laws in this case a high force is transmitted.
- This can be used advantageously when opening a valve element in order to solve bonds that may have resulted.
- the application of a comparatively high force can be advantageous to open the valve element against a pending gas pressure.
- a high control quality is achieved, especially at small opening angles. This can be achieved in that the "actuator" describes a comparatively large angular range, while the valve element is rotated by a small angular range, and thus the angle of the valve element can be set exactly within the framework of the rotation of the "actuator".
- the cam element can be provided in any desired manner with a cam curve.
- it may be a cam in the narrower sense, on the circumference of the cam curve is formed.
- Particular advantages in terms of a compact design and a simultaneously reliable function, however, have been shown for a cam member in the form of a cam in which the cam curve is provided in the form of a recess.
- the recess may be designed as a groove with a bottom, or it may be formed continuously as an opening or opening.
- the cam member cooperates with the roller rotatably mounted on a lever.
- the role runs off to a certain extent on the cam curve and transmits the movement to the lever. In this way, the further transmission of the rotary movement between the rotary drive and the valve element can take place.
- exhaust gas recirculation valve 10 initially has a rotary drive 12, which may be provided for example in the form of a torque or rotary motor.
- a rotary drive 12 which may be provided for example in the form of a torque or rotary motor.
- the valve element is a flap valve, which may be designed substantially in accordance with the above-mentioned application of the Applicant.
- a valve disk 14 is moved in rotation about an axis 16 located outside the valve disk between an open and closed position.
- a rotation in the case shown away from the viewer, about the axis 16, which lifts the valve plate 14 from its valve seat and this here it effectively moves in a lateral edge region of the flowed through and closed with the valve plate 14 line.
- a lever 20 is fixedly mounted on the axis 18 of the rotary drive 12 on the one hand.
- a roller 22 is rotatably provided in the case shown. This roller 22 cooperates with a formed in the cam member 24 as a penetration cam curve 26.
- the cam member 24 is in turn fixedly connected to the axis 16 of the valve member 14.
- the roller 22 in the transmission of the rotational movement is the driving element, while the cam member 24 is driven.
- the lever 20 rotates with the roller 22 attached thereto to the viewer, and the roller 22 cooperates with the cam curve 26 in such a way that the cam element 24 is rotated away from the observer, viewed from above, in the clockwise direction.
- Fig. 2a the initial state is shown, in which the valve is closed.
- the lever 20 has already been rotated by 20 ° counterclockwise.
- the roller 22 in this case presses on the radially inner flank of the cam curve 26. Since the cam curve of the rotational axis 16 of the cam member approaches, thereby rotation of the cam member 24 can be generated in the clockwise direction.
- the cam curve is in this case chosen such that an exemplary rotation of the lever 20 by 20 ° only leads to a rotation of the cam element by (in the example shown) 11.7 °.
- a translation with respect to the transferable force takes place in that, at least in this part of the opening movement, the driving element describes a larger angle than the driven element.
- the force gain generated thereby can be used advantageously to solve possible adhesions of the valve element 14 at its seat, or to cause a reliable opening of the valve, even if a gas pressure acts on the valve.
- a high control quality can be achieved.
- accurate metering of small amounts of exhaust gas recirculation is possible, which can be adjusted by small valve opening angles.
- the characteristic can also be adapted in a suitable manner, and the cam curve 26 can in particular be designed so that towards the end of the opening movement by a relatively small rotation of the lever 20 causes a more extensive rotation of the cam member 24 and thus of the valve element 14 becomes.
- a rotation of the lever 20 by 50 ° takes place, while the cam member 24 has already moved by about 59 °, in a concrete case 58.7 °.
- a power boost was accordingly no longer used here.
- it is usually also not necessary since in this area of the opening movement no adhesions can occur more, and the gas pressure no longer appreciably acts on the already partially folded valve element 14.
- Fig. 2d is the final state, ie the fully open state of the valve element shown.
- the roller 22 on the lever 20 has reached the end of the cam curve 22, and the lever 20 has described here by way of example an angle of 70 °.
- the cam member 24 and thus the valve member 14 have been rotated by 90 °, so that the valve member 14 has been pivoted in such a way in a lateral region of the flow-through conduit that it no longer represents a significant flow resistance.
- the roller 22 rolls on the radially outer flank of the cam curve 26 and presses on its rotation, in this case in the clockwise direction, on this flank in such a way that the cam member 24 is moved back counterclockwise to the closed position of the valve element 14 ,
- the axis of rotation 16 of the cam member which corresponds to the axis of rotation of the valve element 14
- the rotary drive 12 can be arranged quasi aligned with the valve element 14 and its axis of rotation 16, which allows a compact design without the use of a complex geared forming device with gears.
- the cam member 24 is the driven member connected to the valve member 14, but rather the cam member 124 is the driving member.
- the actual rotary drive 112 is arranged a little laterally, and its rotational movement is transmitted in the case shown by way of gears on the cam member 124.
- the circumference of the substantially circular cam member 124 is provided with a gear contour 128.
- the cam member 124 has a cam curve 126 which, in the case shown, is penetrating, but could also be designed as a groove with a bottom.
- the cam curve 126 cooperates with a roller 122 in the cam curve 126 is arranged and is also rotatably mounted on a lever 120.
- the lever 120 is attached to the rotation axis 116 of the valve element 114, so that the lever 120 as a driven element transmits the rotational movement transmitted by the rotary drive 112 by means of the cam element 124 to the valve element 114.
- Fig. 4 is shown in a plan view in addition, as this rotational movement can be transmitted to form a special characteristic.
- the cam curve 126 covers an angle of approximately 360 ° in this case. It should be emphasized, however, that angles smaller or larger than 360 ° are possible, and the cam element 24 according to the embodiment of FIG Fig. 1 and 2 only has a cam curve with an angular range of 70 °.
- selected training of the cam curve 126 a particularly large power gain can be generated in certain phases of the opening process. This results for example from the fact that the cam curve 126 at its beginning, that is, starting from a closed position of the valve, is extremely flat.
- the effective for the opening movement inner edge of the cam curve 126 extends at the beginning of the cam curve 126 only to a small extent in the radial direction. Accordingly, also causes a comparatively extensive rotation of the cam member 124, in the Fig. 4 shown situation by 70 ° from the opening state, a comparatively small rotation of the lever 120. In the example shown was a rotation by only 6 °. Due to this extremely extensive translation, an extensive power boost can be achieved in this phase of the opening process. In particular, the applied force is able to release, if necessary, adhesions of the valve element 114 and to open this also against a pending gas pressure.
- the opening characteristic is such that the rotation of the cam member 124 by 360 ° leads to a rotation of the valve member by 90 °, so that an overall increase in the opening force can be achieved.
- a good dosage of the recirculated exhaust gas amounts is achieved by a high control quality can be ensured for small angles at the beginning of opening.
- the cam member 124 is rotated counterclockwise and the radially outer flank of the cam curve 126 progressively forces the roller 122 inward so that also the lever 120 and thus the valve element 114 is pushed back to the closed position. Also for this embodiment is based on Fig. 4 It can be seen that the axis of rotation 116 of the valve element and the axis of rotation 130 of the cam element can be arranged close to each other, so that a compact design can be realized.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanically-Actuated Valves (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Claims (5)
- Soupape de recyclage des gaz d'échappement (10, 110), comprenant :un entraînement rotatif (12, 112), etun élément de soupape (14, 114) actionnable par rotation entre une position d'ouverture et une position de fermeture,caractérisée en ce qu'il est prévu un élément à came (24, 124) comportant une came (26, 126) qui transmet le mouvement de rotation de l'entraînement rotatif (12, 112) à l'élément de soupape (14, 114), eten ce que l'élément à came (24, 124) coopère avec un galet (22, 122) qui est monté de manière à pouvoir être entraîné en rotation sur un levier (20, 120),l'élément à came (124) étant le cas échéant relié à l'entraînement rotatif (112) par intercalation d'un engrenage, et entraînable en rotation par celui-ci, et le levier (120) étant monté sur un axe de rotation (116) de l'élément de soupape (114), ou le levier (120) étant fixement monté sur un axe (18) de l'entraînement rotatif (12), et l'élément à came (24) étant fixement raccordé à l'axe (16) de l'élément de soupape (14).
- Soupape de recyclage des gaz d'échappement selon la revendication 1,
caractérisée en ce qu'au moins deux des axes de rotation (16, 116, 18, 118, 130) de l'entraînement rotatif (12, 112), de l'élément à came (24, 124) et de l'élément de soupape (14, 114) sont parallèles l'un à l'autre. - Soupape de recyclage des gaz d'échappement selon la revendication 1 ou la revendication 2,
caractérisée en ce que la came (26, 126) de l'élément à came (24, 124) couvre un angle compris entre 70° et 360°. - Soupape de recyclage des gaz d'échappement selon au moins une des revendications précédentes,
caractérisée en ce que la came (26, 126) partant de l'état de fermeture présente d'abord une forme plate, si bien qu'une rotation de l'entraînement rotatif (12, 112) autour d'un angle de rotation défini génère une rotation de l'élément de soupape (14, 114) suivant un angle inférieur à l'angle de rotation de l'entraînement rotatif (12, 112). - Soupape de recyclage des gaz d'échappement selon au moins une des revendications précédentes,
caractérisée en ce que l'élément à came (24, 124) est un disque à came, dans lequel la came (26, 126) est prévue sous la forme d'un évidement.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50306462T DE50306462D1 (de) | 2003-10-24 | 2003-10-24 | Abgasrückführventil |
ES03024509T ES2280668T5 (es) | 2003-10-24 | 2003-10-24 | Válvula de recirculación de gases de escape |
EP03024509A EP1526272B2 (fr) | 2003-10-24 | 2003-10-24 | Soupape de recirculation de gaz d'échappement |
PT03024509T PT1526272E (pt) | 2003-10-24 | 2003-10-24 | Válvula de recirculação de gases de escape |
AT03024509T ATE353400T1 (de) | 2003-10-24 | 2003-10-24 | Abgasrückführventil |
CNB200410095436XA CN100487236C (zh) | 2003-10-24 | 2004-10-24 | 废气再循环阀 |
KR1020040085409A KR100677942B1 (ko) | 2003-10-24 | 2004-10-25 | 배기가스 재순환 밸브 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03024509A EP1526272B2 (fr) | 2003-10-24 | 2003-10-24 | Soupape de recirculation de gaz d'échappement |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1526272A1 EP1526272A1 (fr) | 2005-04-27 |
EP1526272B1 EP1526272B1 (fr) | 2007-02-07 |
EP1526272B2 true EP1526272B2 (fr) | 2012-04-11 |
Family
ID=34384636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03024509A Expired - Lifetime EP1526272B2 (fr) | 2003-10-24 | 2003-10-24 | Soupape de recirculation de gaz d'échappement |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1526272B2 (fr) |
KR (1) | KR100677942B1 (fr) |
CN (1) | CN100487236C (fr) |
AT (1) | ATE353400T1 (fr) |
DE (1) | DE50306462D1 (fr) |
ES (1) | ES2280668T5 (fr) |
PT (1) | PT1526272E (fr) |
Families Citing this family (9)
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 |
PT1876348E (pt) * | 2006-07-06 | 2009-11-04 | Cooper Standard Automotive D | Válvula de recirculação de gases de escape |
DE102009053428A1 (de) * | 2009-11-19 | 2011-06-09 | Pierburg Gmbh | Stellvorrichtung zur Umwandlung einer rotatorischen Bewegung in eine lineare Bewegung |
DE102010025538B4 (de) | 2010-06-29 | 2013-07-18 | Pierburg Gmbh | Stellvorrichtung |
FR2962511B1 (fr) | 2010-07-12 | 2013-07-26 | Sonceboz Automotive Sa | Vanne perfectionnee, et application |
KR101011643B1 (ko) * | 2010-09-08 | 2011-01-28 | 주식회사 유니크 | 차량용 이지알 밸브 |
DE102010050784A1 (de) | 2010-11-10 | 2012-05-10 | Pierburg Gmbh | Stellvorrichtung |
FR2978998B1 (fr) * | 2011-08-08 | 2013-07-26 | Sonceboz Automotive Sa | Dispositif de dosage compact |
US20130269664A1 (en) * | 2012-04-12 | 2013-10-17 | Kamtec Inc. | Exhaust gas recirculation valve and method of manufacturing cam thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3417612A1 (de) † | 1984-05-23 | 1985-11-14 | Csongrád Megyei Víz- és Csatornamü Vállalat, Szentes | Gesteuerter durchflussregler |
US20030136930A1 (en) † | 2002-01-23 | 2003-07-24 | Dowden David E. | Non-coaxial rotary linkage |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1176433B (de) * | 1959-01-16 | 1964-08-20 | Paul Vulliez | Betaetigungseinrichtung fuer ein in zwei Stufen be-wegliches Kueken eines Hahns |
DE1750293B1 (de) * | 1968-04-19 | 1971-07-29 | Emil Haselhofer Feinmechanik E | Mischventil mit steuerkurvenscheiben |
DE19704091A1 (de) * | 1997-02-04 | 1998-08-06 | Wahler Gmbh & Co Gustav | Abgasrückführventil für eine Brennkraftmaschine |
LU90480B1 (en) * | 1999-11-29 | 2001-05-30 | Delphi Tech Inc | Exhaust gas re-circulation device for an internal combustion engine |
-
2003
- 2003-10-24 ES ES03024509T patent/ES2280668T5/es not_active Expired - Lifetime
- 2003-10-24 EP EP03024509A patent/EP1526272B2/fr not_active Expired - Lifetime
- 2003-10-24 DE DE50306462T patent/DE50306462D1/de not_active Expired - Lifetime
- 2003-10-24 AT AT03024509T patent/ATE353400T1/de active
- 2003-10-24 PT PT03024509T patent/PT1526272E/pt unknown
-
2004
- 2004-10-24 CN CNB200410095436XA patent/CN100487236C/zh not_active Expired - Fee Related
- 2004-10-25 KR KR1020040085409A patent/KR100677942B1/ko active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3417612A1 (de) † | 1984-05-23 | 1985-11-14 | Csongrád Megyei Víz- és Csatornamü Vállalat, Szentes | Gesteuerter durchflussregler |
US20030136930A1 (en) † | 2002-01-23 | 2003-07-24 | Dowden David E. | Non-coaxial rotary linkage |
Also Published As
Publication number | Publication date |
---|---|
KR100677942B1 (ko) | 2007-02-06 |
EP1526272B1 (fr) | 2007-02-07 |
ATE353400T1 (de) | 2007-02-15 |
DE50306462D1 (de) | 2007-03-22 |
KR20050039683A (ko) | 2005-04-29 |
EP1526272A1 (fr) | 2005-04-27 |
CN1641204A (zh) | 2005-07-20 |
PT1526272E (pt) | 2007-03-30 |
CN100487236C (zh) | 2009-05-13 |
ES2280668T5 (es) | 2012-10-15 |
ES2280668T3 (es) | 2007-09-16 |
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