EP1072762B1 - Dispositif de commande d'une soupage et moteur à combustion interne muni de ce dispositif - Google Patents
Dispositif de commande d'une soupage et moteur à combustion interne muni de ce dispositif Download PDFInfo
- Publication number
- EP1072762B1 EP1072762B1 EP00402105A EP00402105A EP1072762B1 EP 1072762 B1 EP1072762 B1 EP 1072762B1 EP 00402105 A EP00402105 A EP 00402105A EP 00402105 A EP00402105 A EP 00402105A EP 1072762 B1 EP1072762 B1 EP 1072762B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- axis
- cam
- rotation
- regulating
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
Definitions
- the present invention relates to a control device of a valve and an internal combustion engine provided with this device.
- One of the main criteria for the design and development of an internal combustion engine is most often to increase the performance of the engine for a high rotational speed without degrading the performance, including available torque, low and medium speed.
- variable distribution systems it is known to use three-dimensional cams, that is to say whose profile is variable the along their axis of rotation.
- Such a design makes it possible, thanks displacement of the camshaft parallel to its axis of rotation, to obtain different distribution configurations.
- This design is particularly complex and leads to an increase in the longitudinal engine.
- FR-A-2,453,979 describes a device for controlling a valve of internal combustion engine, of the type comprising a rocker arm, mounted articulated on a support, around a fixed oscillation axis, provided with a first arm urging the free end of the tail of the valve and a second arm urged by a rotary control cam, and means for adjusting the lifting of the valve.
- the means for adjusting the valve lift described in this document comprising an eccentric associated with an axis of rotation of the rocker, are relatively complex.
- Also known from GB-A-12069 is a control device of an internal combustion engine valve according to the preamble of claim 1.
- the object of the invention is to propose a control device a simple and inexpensive valve, reduced longitudinal dimensions, this avoiding as much as possible the use of elements that are sensitive to wear, particular elements continuously or frequently urged in rotation.
- the subject of the invention is a control device valve, of the aforementioned type, characterized in that the contact surface of the adjusting cam with the second roller is delimited by a rectilinear ramp, and the adjustment cam is slidably mounted in a curvilinear guide secured to the support, so as to describe a curvilinear race centered on a guide axis substantially parallel to the fixed oscillation axis.
- the invention also relates to a combustion engine internal characterized in that it comprises a valve control device as defined above, the valve being preferably a valve intake.
- Figures 1 to 3 are similar elevational views showing a valve control device according to three embodiments of the invention respectively.
- FIG. 1 shows a device 10 according to a first embodiment of the invention for controlling a valve 12 of internal combustion engine.
- This control device 10 is arranged in a cylinder head 14 of the engine.
- valve 12 is movable between a closed position, such shown in FIG. 1, resting on a seat 16 formed in the yoke 14, and an open position (not shown). Valve 12 is resiliently biased back to its closed position using conventional means not shown.
- control device 10 is intended to actuate an engine intake valve.
- this same device 10 could be used to actuate a valve exhaust.
- the control device 10 comprises a rocker 18, mounted articulated on the yoke 14, about a fixed axis of oscillation F1.
- the rocker 18 is provided with a first arm 18A urging the free end of the tail 20 of the valve 12 and a second arm 18B biased by a cam of rotary control 22. It will be noted that the rocker arm 18 forms a lever of the first kind.
- the cam 22 is carried by a conventional camshaft 24 mounted rotating around a fixed axis of rotation F2 forming the axis of rotation of the cam 22.
- the control device 10 also comprises means adjusting the lift of the valve 12 having an adjusting member 28 of triangular general shape.
- the adjusting member 28 is articulated on the second arm 18B of the rocker arm around a mobile oscillation axis M1.
- the regulator 28 carries two rotary rollers 30, 32.
- a first roller 30 is in contact with the control cam 22.
- This first roller 30 is mounted articulated on the body adjusting 28 around a first mobile axis of rotation R1.
- the second pebble 32 is in contact with an adjusting cam 34.
- This second roller 32 is hingedly mounted on the adjusting member 28 around a second axis of rotation mobile R2.
- axes F1, F2, M1, R1 and R2 are substantially parallel to each other. It will also be noted that the three movable axes M1, R1 and R2 form, in a plane perpendicular to them, the three vertices of a triangle. All axes F1, F2, M1, R1 and R2 are distinct two by two.
- the adjustment cam 34 is displaceably mounted on the yoke 14 so that for a constant position of the control cam 22 corresponding to a position of the valve 12 where it is open, the displacements of this adjustment cam 34 vary the distance between the fixed oscillation axis F1 and the second mobile rotation axis R2.
- the contact surface of the adjustment cam 34 with the second roller 32 is delimited by a rectilinear ramp 36.
- the adjustment cam 34 is mounted sliding in a curvilinear guide 38 secured to the yoke 14, so as to describe a curvilinear race centered on a substantially guide axis G parallel to the fixed oscillation axis F1.
- the guide axis G coincides with the second axis of rotation mobile R2 when the valve 12 is in a reference position, namely the closed position as illustrated in Figure 1.
- the adjustment cam 34 is moved using means conventional devices including, for example, an electric or hydraulic actuator.
- the rotary cam 22 biases the adjustment member 28 by intermediate of the first roller 30.
- the cam is controlled adjustment device 34 so as to move it in contact with the curvilinear guide 38, which has the effect, for a constant position of the control cam 22 corresponding to a position of the valve where it is open, of change the distance between the fixed oscillation axis F1 and the second axis of R2 mobile rotation. Changing this distance causes a modification of valve lift 12.
- the adjustment of the lift of the valve can be realized continuously because the adjustment cam 34 can move continuously in the curvilinear guide 38.
- the engine comprises an associated crankshaft to the valve control device.
- the curve of the lifting of the valve depending on the rotation angle of the crankshaft conventionally has a shape general bell (see for example FR-A-2,453,979).
- the control device 10 comprises means for adjusting the angular setting of the control cam 22.
- the adjustment means of the setting comprises a pivot 40, materializing the first mobile axis of rotation R1, mounted movable in a curvilinear light 42 curving around the fixed axis of rotation F2 of the cam 22.
- the curvilinear light 42 is centered on an axis of setting C coinciding with the fixed axis of rotation F2 of the control cam 22 when the valve 12 is in a reference position, namely its closed position as shown in Figure 2.
- the pivot 40 is moved in the curvilinear lumen 42 with the aid of conventional means including, for example, an electric actuator or hydraulic. These means also make it possible to immobilize the pivot 40 in the light 42 in the desired adjustment setting position.
- the wedging means comprise conventional means. coupled to the camshaft 24.
- These conventional means include, for example, for example, a helical type coupling.
- the adjustment means calibration illustrated in Figures 2 and 3 allow to vary the delay or the advance of the opening and closing of the valve 12.
- the control device of a valve according to the invention allows the valve lift to be continuously adjusted by means of a adjustment cam 34 whose movements are limited, which reduces the risks of wear.
- the opening and closing of the valve are carried out in a progressive and silent way, this using means reduced space, especially in the longitudinal direction of the engine, namely the direction parallel to the fixed axis F1 oscillation of the rocker arm.
- the device of the invention can be used in an engine comprising one or two camshafts.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Fluid-Driven Valves (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
- l'axe de guidage coïncide avec le second axe de rotation mobile lorsque la soupape est dans une position de référence,
- il comprend des moyens de réglage du calage angulaire de la came de commande,
- les moyens de réglage du calage comprennent un pivot matérialisant le premier axe de rotation mobile, monté déplaçable dans une lumière curviligne s'incurvant autour d'un axe de rotation fixe de la came de commande,
- la lumière curviligne est centrée sur un axe de calage coïncidant avec l'axe de rotation fixe de la came de commande lorsque la soupape est dans une position de référence,
- les moyens de réglage du calage comprennent des moyens couplés à un arbre à cames portant la came de commande.
Claims (7)
- Dispositif de commande d'une soupape (12) de moteur à combustion interne, du type comprenant un culbuteur (18), monté articulé sur un support (14), autour d'un axe d'oscillation fixe (F1), muni d'un premier bras (18A) sollicitant l'extrémité libre de la queue (20) de la soupape (12) et d'un second bras (18B) sollicité par une came de commande rotative (22), et des moyens (28, 34) de réglage de la levée de la soupape comprenant un organe de réglage (28), monté articulé sur le second bras (18B) du culbuteur autour d'un axe d'oscillation mobile (M1), un premier galet (30) de contact avec la came de commande (22), lequel est monté articulé sur l'organe de réglage (28) autour d'un premier axe de rotation mobile (R1), et un second galet (32) de contact avec une came de réglage (34), lequel est monté articulé sur l'organe de réglage (28) autour d'un second axe de rotation mobile (R2), les axes d'oscillation (F1, M1) et de rotation (R1, R2) étant tous distincts et sensiblement parallèles entre eux, la came de réglage (34) étant montée déplaçable sur le support (14) de sorte que, pour une position constante de la came de commande (22) correspondant à une position de la soupape (12) où celle-ci est ouverte, les déplacements de cette came de réglage (34) fassent varier la distance entre l'axe d'oscillation fixe (F1) et le second axe de rotation mobile (R2), caractérisé en ce que la surface de contact de la came de réglage (34) avec le second galet (32) est délimitée par une rampe rectiligne (36) et la came de réglage (34) est montée coulissante dans un guide (38) curviligne solidaire du support (14), de façon à décrire une course curviligne centrée sur un axe de guidage (G) sensiblement parallèle à l'axe d'oscillation fixe (F1).
- Dispositif selon la revendication 1, caractérisé en ce que l'axe de guidage (G) coïncide avec le second axe de rotation mobile (R2) lorsque la soupape (12) est dans une position de référence.
- Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens (40, 42 ; 44) de réglage du calage angulaire de la came de commande (22).
- Dispositif selon la revendication 3, caractérisé en ce que les moyens de réglage du calage comprennent un pivot (40) matérialisant le premier axe de rotation mobile (R1), monté déplaçable dans une lumière curviligne (42) s'incurvant autour d'un axe de rotation fixe (F2) de la came de commande (22).
- Dispositif selon la revendication 4, caractérisé en ce que lumière curviligne (42) est centrée sur un axe de calage (C) coïncidant avec le l'axe de rotation fixe (F2) de la came de commande lorsque la soupape (12) est dans une position de référence.
- Dispositif selon la revendication 3, caractérisé en ce que les moyens de réglage du calage comprennent des moyens (44) couplés à un arbre à cames (24) portant la came de commande (22).
- Moteur à combustion interne, caractérisé en ce qu'il comprend un dispositif de commande de soupape selon l'une quelconque des revendications précédentes, la soupape étant de préférence une soupape d'admission.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9909810 | 1999-07-28 | ||
FR9909810A FR2796982B1 (fr) | 1999-07-28 | 1999-07-28 | Dispositif de commande d'une soupape et moteur a combustion interne muni de ce dispositif |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1072762A2 EP1072762A2 (fr) | 2001-01-31 |
EP1072762A3 EP1072762A3 (fr) | 2001-10-24 |
EP1072762B1 true EP1072762B1 (fr) | 2005-03-23 |
Family
ID=9548630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00402105A Expired - Lifetime EP1072762B1 (fr) | 1999-07-28 | 2000-07-21 | Dispositif de commande d'une soupage et moteur à combustion interne muni de ce dispositif |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1072762B1 (fr) |
AT (1) | ATE291680T1 (fr) |
DE (1) | DE60018856T2 (fr) |
FR (1) | FR2796982B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4083394A4 (fr) * | 2019-12-25 | 2024-01-17 | Kawasaki Heavy Ind Ltd | Mécanisme de soupape réglable |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10155007A1 (de) * | 2001-11-06 | 2003-05-15 | Herbert Naumann | Hubventilsteuerung |
GB0200936D0 (en) * | 2002-01-16 | 2002-03-06 | Lotus Car | Valve operating mechanisms |
DE10206465A1 (de) | 2002-02-16 | 2003-08-28 | Mahle Ventiltrieb Gmbh | Steuereinrichtung für Gaswechselventile eines Verbrennungsmotors |
DE10214802A1 (de) * | 2002-04-04 | 2003-10-16 | Thyssen Krupp Automotive Ag | Führungssysteme für variable Ventilsteuerungen |
GB2395229A (en) | 2002-11-16 | 2004-05-19 | Mechadyne Plc | Engine with variable valve lift and timing mechanism |
JP4381188B2 (ja) * | 2004-03-19 | 2009-12-09 | 三菱ふそうトラック・バス株式会社 | 内燃機関の可変動弁装置 |
DE112004001267B4 (de) | 2004-03-23 | 2010-06-24 | Mitsubishi Fuso Truck And Bus Corp. | Variabler Ventiltrieb eines Verbrennungsmotors |
CN100406689C (zh) * | 2004-04-27 | 2008-07-30 | 三菱扶桑卡客车公司 | 内燃机的可变气门机构 |
DE102006003002B3 (de) * | 2006-01-23 | 2007-03-08 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Ventiltrieb für Ladungswechselventile von Verbrennungsmotoren |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395783A2 (fr) | 1977-06-29 | 1979-01-26 | Lamort Ingenieurs Const E Et M | Perfectionnements au dispositif pour l'extraction des matieres cellulosiques ou analogues |
SE7907399L (sv) | 1979-09-05 | 1981-03-06 | Mo Och Domsjoe Ab | Anordning for att genom kombinerad krossning och rivning sonderdela avfallsmaterial |
FR2519375B1 (fr) * | 1981-12-31 | 1986-07-11 | Baguena Michel | Distribution variable pour moteur a quatre temps |
DE3438556A1 (de) * | 1984-10-20 | 1986-04-24 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | Ventilsteuerung einer aufgeladenen viertakt-brennkraftmaschine |
DE3833540A1 (de) * | 1988-10-01 | 1990-04-12 | Peter Prof Dr Ing Kuhn | Vorrichtung zur betaetigung der ventile an verbrennungsmotoren mit veraenderlicher ventilerhebungskurve |
DE4114780A1 (de) | 1991-05-06 | 1992-11-12 | Courtnay Commodity Ltd | Muellverwertungsverfahren und -einrichtung zum trennen von haerteren und weicheren muellbestandteilen |
FR2746410B1 (fr) | 1996-03-22 | 1998-04-24 | Sogea | Systeme de fermentation aerobie de dechets organiques |
-
1999
- 1999-07-28 FR FR9909810A patent/FR2796982B1/fr not_active Expired - Fee Related
-
2000
- 2000-07-21 EP EP00402105A patent/EP1072762B1/fr not_active Expired - Lifetime
- 2000-07-21 AT AT00402105T patent/ATE291680T1/de not_active IP Right Cessation
- 2000-07-21 DE DE60018856T patent/DE60018856T2/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4083394A4 (fr) * | 2019-12-25 | 2024-01-17 | Kawasaki Heavy Ind Ltd | Mécanisme de soupape réglable |
Also Published As
Publication number | Publication date |
---|---|
FR2796982B1 (fr) | 2001-10-26 |
EP1072762A3 (fr) | 2001-10-24 |
DE60018856T2 (de) | 2006-03-30 |
DE60018856D1 (de) | 2005-04-28 |
FR2796982A1 (fr) | 2001-02-02 |
EP1072762A2 (fr) | 2001-01-31 |
ATE291680T1 (de) | 2005-04-15 |
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