EP0909881A2 - Dispositif de commande variable des soupapes d'un moteur à combustion interne - Google Patents

Dispositif de commande variable des soupapes d'un moteur à combustion interne Download PDF

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Publication number
EP0909881A2
EP0909881A2 EP98117123A EP98117123A EP0909881A2 EP 0909881 A2 EP0909881 A2 EP 0909881A2 EP 98117123 A EP98117123 A EP 98117123A EP 98117123 A EP98117123 A EP 98117123A EP 0909881 A2 EP0909881 A2 EP 0909881A2
Authority
EP
European Patent Office
Prior art keywords
inlet
cam
cams
camshaft
transmission lever
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Withdrawn
Application number
EP98117123A
Other languages
German (de)
English (en)
Other versions
EP0909881A3 (fr
Inventor
Alexander Hiereth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0909881A2 publication Critical patent/EP0909881A2/fr
Publication of EP0909881A3 publication Critical patent/EP0909881A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0047—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other

Definitions

  • the invention relates to a device for variable valve control for an internal combustion engine according to the generic term of claim 1.
  • Such a device is known from DE 196 00 536 A1. With this device it is possible to remove pollutants to reduce in the exhaust gas or an increase in torque to reach. By reducing the charge exchange losses consumption can be reduced when controlling the internal combustion engine on a throttle valve in the intake duct.
  • the device comprises two camshafts, one of which Camshafts the opening function of the intake valves as well of the exhaust valve and the other camshaft the closing function the intake valves takes over.
  • the inlet cams an intake-open cam on the first camshaft and an intake-close cam on the second camshaft, that work together like an adder.
  • the Adjustment movement of the inlet cam is by means of a transmission lever transferred to the inlet valve.
  • the actuating movement the exhaust cam is by means of another transmission lever transferred to the exhaust valve.
  • the relative angle can be used to change the phase position be adjusted between the two camshafts the opening stroke and the opening time of the intake valve influence.
  • the outlet cam and the inlet-open cam are in the axial direction one behind the other on the first camshaft, so that at least one of the cams is laterally spaced to one of the valves in the middle is.
  • the lateral distance between the cam and the relevant one Valve must be bridged by the transmission lever. This creates the problem that the pivot point between the relevant cam and the transmission lever outside the plane of movement of the lever. Has this asymmetry Torsional forces that accelerate the aging process and impair precise transmission of motion can.
  • the invention is based on the problem of a small construction Generic device with high functional reliability to train.
  • the centrally arranged exhaust cam enables the formation of a short transmission lever to the exhaust valve; Exhaust cam, transmission lever and exhaust valve are in a common plane and there are only relatively small forces. In particular with a symmetrical arrangement of the two inlet-open cams on both sides of the outlet cam, the inlet transmission lever is also loaded uniformly while avoiding additional torsional forces. Overall, a small-sized device can be realized.
  • the cylinder head 16 shown in FIGS. 1 and 2 has one Device 1 for the variable control of the valves of an internal combustion engine on.
  • the device 1 comprises two axially parallel Camshafts 2 and 3 on the top of the cylinder head 16 with inlet cams 4a, b, 5a, b arranged thereon and an outlet cam 6.
  • the camshafts 2, 3 are in bearings 30, 31, the are formed in a support section 32, rotatably held.
  • the actuating movement of the inlet and outlet cams is via a Inlet transmission lever 9 and outlet transmission lever 10 on transmit two inlet valves 7a, b and one outlet valve 8.
  • inlet channels 33a, b are shown, the the inlet valves 7a, b are to be closed.
  • the inlet cams comprise four individual cams. On the first Camshaft 2 are two inlet-open cams 4a, b and on the second camshaft 3 two inlet-closing cams 5a, b are provided. Via the inlet-open cams 4a, b, the opening function, the closing function via the inlet-closing cams 5a, b of the intake valves 7a, b controlled.
  • the actuating movement the inlet-open cam and the inlet-close cam overlap is like an adder and is accessed by a tap 14 scanned.
  • the tap device 14 transmits the actuating movement to the inlet transmission lever 9.
  • the tap 14 includes one roller axis 25 and several arranged on the roller axis 25, parallel rollers 23. Each roller 23 lies on the contour one of the inlet cams 4a, b, 5a, b.
  • the tap device 14 is acted upon by spring elements 15a, b which a defined system of the tap on the inlet cam guarantee.
  • the spring elements 15a, b are supported Support elements 26a, b, which are held on a shaft 27.
  • the inlet transmission lever 9 is also on the shaft 27 stored and rotates about the shaft axis of rotation 13, which is parallel runs to the longitudinal axes 12, 19 of the camshafts 2, 3.
  • a device, not shown, for changing the phase position between the two camshafts 2, 3 is a variable Control of the opening stroke and duration of the intake valves 7a, b reached.
  • This facility allows on a throttle valve in the intake duct of the internal combustion engine dispense.
  • the device is useful as a coupling gear formed between the two camshafts over which the relative Angle of rotation of the second camshaft 3 with respect to the first Camshaft 2 changed over a wide angular range can be.
  • the exhaust cam 6 for controlling the exhaust valve 8 is open the same camshaft 2 as the inlet-open cams 4a, b educated.
  • the actuating movement is directly from the outlet transmission lever 10 tapped and on the exhaust valve 8th transfer.
  • the outlet transfer lever 10 is like that Inlet transmission lever 9 rotatably supported on the shaft 27.
  • the inlet-open cams 4a, b are in the direction of the longitudinal axis 12 of the first camshaft 2 seen at a distance from the exhaust cam 6 arranged.
  • spark plug shafts 18a, b are for double ignition intended.
  • the cylinder head 16 is over screw brackets 17 attached to the engine block.
  • the outlet cam 6 is in the center of the first camshaft 2 arranged so that the center bisector the exhaust cam 6 with the central plane 20 of the cylinder head 16 coincides.
  • the central plane 20 is identical to the movement plane 22 of the outlet transmission lever 10 for actuation of the exhaust valve 8, which is also in the central plane 20 lies, is moved up and down in the movement plane 22.
  • the Plane of movement 22 or central plane 20 also forms a plane of symmetry for the two inlet channels 33a, b and the two spark plug shafts 18a, b in the cylinder head 16.
  • the total four inlet cams, two inlet-open cams 4a, b each the first camshaft 2 and two inlet-closing cams 5a, b on the second camshaft 3, are symmetrical to the central plane 20th
  • the arrangement of the outlet cam 6 in the plane of movement 22 of the outlet transmission lever 10 can simplify the device be designed. It is a reduction in particular the friction of the exhaust transmission lever 10 on the shaft 27 possible because the outlet transmission lever 10 has only one bearing is held on the shaft 27. All forces to be transferred between Exhaust cam 6 and exhaust valve 8 are in the plane of movement 22; Torsional forces are avoided.
  • the simple one Design allows the moving masses to be reduced, thereby a further reduction in strength is achieved.
  • the distance between the inlet-open cam 4a, b and the outlet cam 6 so dimensioned that the inlet-closing cams 5a, b in the space between the inlet-open cams and the outlet cams can register. Due to the large distance between the inlet-open cams and the exhaust cam is the manufacture of the camshaft 2 relieved.
  • the tap device 14 is provided.
  • the two inner roles 23 are the inlet-closing cam 5a, b on the second Assigned camshaft 3
  • the two outer rollers 23 are the Inlet-open cams 4a, b assigned on the first camshaft.
  • the tap 14 is from the spring elements 15a, b in contact with the inlet and outlet cams.
  • the shaft 27, the longitudinal axis of which is also the axis of rotation 13 for the inlet transmission lever 9 and the outlet transmission lever 10 forms, is also the carrier of the support elements 26a, b, on which the spring elements 15a, b are supported.
  • the inlet transmission lever 9 is approximately U-shaped and comprises two longitudinal webs 34a, b, which are parallel to the central plane 20 extend, and a crossbar 35. In the corner areas between the two longitudinal webs 34a, b and the transverse web 35 are the approximately cylindrical actuating sections 9a, b for actuation of the inlet valves 7a, b are formed. At the free ends the longitudinal webs 34a, b bearings are formed over which the Inlet transmission lever 9 rotatably supported on the shaft 27 is.
  • the double bearing and the middle plane 20 Reduce the symmetrical design of the inlet transmission lever 9 the forces acting on the lever; it occurs in particular no torsional forces acting around the longitudinal axis of the lever on.
  • the longitudinal webs 34a, b form slide rails for the Tapping device 14, the roller axis 25 each in the area between the outer and inner rollers 23 rests on the longitudinal webs 34a, b.
  • the tap 14 is shown in section.
  • the tap device 14 comprises 23 in addition to the rollers on the roller axis 25 also a roller carriage 36 on which attack the spring elements 15a, b.
  • FIG. 7 shows that the Cams on camshafts 2 and 3 are mounted on shaft 27 Adjust transmission lever 9 and 10. The actuating movement is from the transmission levers to the intake and exhaust valves transfer.
  • the example of exhaust valve 8 shows that the valve is guided in a valve guide 29 and by a Valve spring 28 is urged in the direction of its closed position is.
  • Fig. 8 is the first inlet duct 33a without an inlet valve and the second inlet duct 33b with an inlet valve 7b drawn.
  • the exhaust and intake transmission levers can be constructed made of a light material such as aluminum be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP98117123A 1997-10-16 1998-09-10 Dispositif de commande variable des soupapes d'un moteur à combustion interne Withdrawn EP0909881A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19745716A DE19745716A1 (de) 1997-10-16 1997-10-16 Vorrichtung zur variablen Ventilsteuerung für eine Brennkraftmaschine
DE19745716 1997-10-16

Publications (2)

Publication Number Publication Date
EP0909881A2 true EP0909881A2 (fr) 1999-04-21
EP0909881A3 EP0909881A3 (fr) 1999-06-09

Family

ID=7845714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117123A Withdrawn EP0909881A3 (fr) 1997-10-16 1998-09-10 Dispositif de commande variable des soupapes d'un moteur à combustion interne

Country Status (3)

Country Link
US (1) US6009842A (fr)
EP (1) EP0909881A3 (fr)
DE (1) DE19745716A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1050669A3 (fr) * 1999-05-05 2001-05-16 Adam Opel Ag Dispositif de commande de soupape à levée variable pour moteur à combustion interne
WO2007138354A1 (fr) * 2006-05-31 2007-12-06 Mechadyne Plc Moteur équipé d'un mécanisme de commande de soupape variable

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3799944B2 (ja) 2000-03-21 2006-07-19 トヨタ自動車株式会社 内燃機関の可変動弁機構および吸気量制御装置
WO2002029214A1 (fr) * 2000-09-29 2002-04-11 Edward Charles Mendler Systeme de commande de soupapes
JP4057855B2 (ja) * 2002-07-05 2008-03-05 本田技研工業株式会社 内燃機関の動弁装置
JP2006307765A (ja) * 2005-04-28 2006-11-09 Honda Motor Co Ltd 内燃機関のリフト可変動弁装置
JP4702574B2 (ja) * 2009-11-06 2011-06-15 三菱自動車工業株式会社 内燃機関の可変動弁装置
DE102015200597A1 (de) * 2015-01-16 2016-07-21 Ford Global Technologies, Llc Fremdgezündete Brennkraftmaschine mit variablem Ventiltrieb und Verfahren zum Betreiben einer derartigen Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19600536A1 (de) 1996-01-09 1997-07-10 Meta Motoren Energietech Vorrichtung zur variablen Steuerung eines Einlaßventils

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
DE3217203A1 (de) * 1981-05-15 1982-12-02 Honda Giken Kogyo K.K., Tokyo Variable ventilsteuerung
US4546735A (en) * 1984-01-23 1985-10-15 Southwest Research Institute Valve actuator
US4862845A (en) * 1988-05-10 1989-09-05 Borg-Warner Transmission And Engine Components Corporation Variable camshaft timing system
AT404864B (de) * 1989-10-25 1999-03-25 Avl Verbrennungskraft Messtech Brennkraftmaschine mit mehr als zwei ventilen je zylinder
GB9018558D0 (en) * 1990-08-23 1990-10-10 Ricardo Group Plc Valve gear for internal combustion engines
US5052350A (en) * 1990-11-02 1991-10-01 King Brian T Device to combine the motions of two camlobes differentially phased
AU664547B2 (en) * 1991-04-24 1995-11-23 Donald Charles Wride Valve control mechanism
US5241928A (en) * 1992-03-13 1993-09-07 Suzuki Motor Corp. Movable valve device for engine
DE4236600C2 (de) * 1992-10-29 1999-03-11 Audi Ag Ventilbetätigungsmechanismus für eine Mehrzylinder-Brennkraftmaschine
US5263739A (en) * 1992-12-28 1993-11-23 General Motors Corporation Air bag module
EP0677139A1 (fr) * 1992-12-30 1995-10-18 Meta Motoren- Und Energie-Technik Gmbh Dispositif permettant de commander les soupapes de moteurs a combustion, et notamment de commander sans papillon le circuit de puissance de moteurs a essence
DE4322480C2 (de) * 1993-07-06 1996-05-02 Meta Motoren Energietech Vorrichtung zur variablen Ventilsteuerung von Brennkraftmaschinen
US5590906A (en) * 1993-10-13 1997-01-07 Trw Vehicle Safety Systems Inc. Vehicle occupant restraint inflator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19600536A1 (de) 1996-01-09 1997-07-10 Meta Motoren Energietech Vorrichtung zur variablen Steuerung eines Einlaßventils

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1050669A3 (fr) * 1999-05-05 2001-05-16 Adam Opel Ag Dispositif de commande de soupape à levée variable pour moteur à combustion interne
WO2007138354A1 (fr) * 2006-05-31 2007-12-06 Mechadyne Plc Moteur équipé d'un mécanisme de commande de soupape variable
CN101490369B (zh) * 2006-05-31 2011-09-14 麦加戴恩公共有限公司 具有可变气门致动机构的发动机
US8113158B2 (en) 2006-05-31 2012-02-14 Mechadyne Plc Engine with variable valve actuating mechanism

Also Published As

Publication number Publication date
DE19745716A1 (de) 1999-04-22
US6009842A (en) 2000-01-04
EP0909881A3 (fr) 1999-06-09

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