EP1458956A1 - Vorrichtung zur variablen betätigung der ladungswechselventile in hubkolbenmotoren - Google Patents
Vorrichtung zur variablen betätigung der ladungswechselventile in hubkolbenmotorenInfo
- Publication number
- EP1458956A1 EP1458956A1 EP02799032A EP02799032A EP1458956A1 EP 1458956 A1 EP1458956 A1 EP 1458956A1 EP 02799032 A EP02799032 A EP 02799032A EP 02799032 A EP02799032 A EP 02799032A EP 1458956 A1 EP1458956 A1 EP 1458956A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate member
- housing
- joint
- curve
- cam
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title 1
- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 13
- 230000001133 acceleration Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
Definitions
- the invention specified in claim 1 is based on the object, the requirements placed on the engine by a variable
- Valve control better than the state of the art. These requirements are described on the one hand in the design of the individual valve lift profiles, the family of valve lift profiles that can be generated and on the other hand in the size of the mechanical losses due to friction when driving the valves.
- the individual valve lift profiles and the family of valve lift profiles that can be generated must be as free as possible with regard to Opening angle, closing angle, valve lift, valve acceleration curve and phase position to the crank angle can be designed.
- the losses due to mechanical friction should be kept as small as possible. As far as possible, these requirements are to be met without additional construction effort, in particular construction height.
- the gearbox consists of a driving shaft (W), which is guided in a rotatable joint (wg) in the housing (G) and which actuates an intermediate link (Z) via a cam joint (zw).
- This intermediate link (Z) is supported on the one hand via a cam joint (zg) in the housing (G), for example in the cylinder head, and is operatively connected to an output link (A).
- the cam joint (zg) between the intermediate member (Z) and the housing (G) consists of a section forming a catch and a control section. To change the valve stroke, it is provided that the position (a) of the control section relative to the swivel joint (wg) of the shaft (W) in the housing (G) can be changed during engine operation.
- the output member (A) is clearly in the housing (G), for example in a swivel joint (ag) and transmits the movement to at least one valve (V).
- the advantages achieved with the invention result from the fact that the intermediate member (Z) is connected to the output member (A) via a cam joint (za) and thereby the number of joint values on the intermediate member (Z) driven by the shaft (W) and at the same time the sum of the joint valency of the transmission is reduced.
- the transmission has an additional degree of freedom of movement, which involves a displacement of the intermediate link (Z) relative to the abrasion link (A) along the curve of the cam joint (za) between the intermediate link (Z) and the output link (A) and at the same time a rotation of the intermediate link (Z) relative to the abrasion member (A) around that
- the additional degree of freedom of movement causes the intermediate link (Z) to roll off the output link (A).
- This rotary movement causes a displacement flow of the lubricant, which in turn significantly supports the build-up of a load-bearing lubricating film in the contact between the intermediate link (Z) and the output link (A).
- the rotary movement partially reduces the sliding speed at the contact point by rolling. Each of these effects reduces the friction at the contact point mentioned.
- the design according to the invention also has the advantage of not requiring more space than in the prior art.
- the advantageous design of the contour (Kaz or / and Kza) of at least one of the two contact partners in the curved joint (za) between the intermediate member (Z) and the output member (A) is described as a circular arc.
- the contour determining the curve joint is assigned exclusively to one contact partner
- the contour of the other contact partner becomes an arc or a circle, which is advantageously designed as a rotatable roller.
- the contact partners roll on the shape determining the cam joint and the tangential movement is shifted onto the bearing of the rotatable roller. Due to the materials and lubrication conditions known from plain bearings and the use of a small friction radius, the friction in this cam joint is reduced.
- Claim 4 describes an embodiment of the transmission, in which the curve-joint-determining contour of the curve joint (zg) between the intermediate member (Z) and housing (G) is formed exclusively by the contour (Kzul) on the intermediate member (Z) and the contour (Kgzl) of the housing Support is a fit role ( Figure 2).
- Claim 5 describes an embodiment of the transmission, in which the curve-joint-determining contour of the curve joint (zg) between the intermediate member (Z) and the housing (G) is formed exclusively by the contour (Kgz2) on the housing (G) and the intermediate-side contour (Kzg2) is one viable role is (Figure 3).
- Claim 6 describes an embodiment of the transmission, in which the curve-joint-determining contour of the curve joint (zw) between the intermediate member (Z) and the shaft (W) is formed exclusively by the contour (Kwzl) on the shaft (W) and the link-side contour (Kzwl) is a fit role (Figure 4).
- Claim 7 describes an embodiment of the transmission, in which the curve-joint-determining contour of the curve joint (za) between the intermediate element (Z) and the output element (A) is formed exclusively by the contour (Kazl) on the output element (A) and the intermediate element-side contour (Kzal) Circular arc ( Figure 5) or a fit Rolie.
- Claim 10 describes the advantageous design of the intermediate member (Z), in which at least two of the curved joints on the intermediate member (Z) are represented on the intermediate member side by rotating bodies and at least two of the centers of rotation of these rotating bodies coincide. In this way, the installation space is minimized and the forces resulting from the rotational acceleration of the intermediate member (Z) are reduced.
- Claim 11 is carried out that by a joint actuation of several output members (Ai) and valves (Vi) of a cylinder by a cam (N) and an intermediate member (Z), the number of joints and the moving masses can be reduced, which is advantageous Reduced friction and, by reducing the number of components, also reduced the construction effort (Figure 7).
- the part (g2) forming the control area can be rotatably mounted in a sliding part (S) and the sliding part (S) can be slidably mounted in the housing (G).
- the displacement position (rs) of the sliding part (S) can be set, for example, by a cam (VNs) fastened in the housing (G).
- Rotational movement (rd) of the part (g2) forming the control area can be adjusted by a cam (VNd) fastened in the housing (G) or by a cam (VNd) fastened in the slant part (S).
- the rotary movement (rd) of the part (g2) forming the control area can be set independently of the displacement position (rs) of the sliding part (S).
- the rotary movement (rd) is controlled by a cam in the housing (G) by the displacement (rs) of the sliding part (S).
- the position (a) of the control curve can be displaced (rv) and rotated (rd) in the latching direction. This further increases the design freedom of the valve lift curve. A loss of contact of the transmission members does not occur.
- the valve acceleration and valve lift can also be changed ( Figure 8).
- the part (gl) forming the latching section in the housing (G) can be used to ensure the return movement of the intermediate link (Z) and thus the cam contact by being rotatably mounted in the housing (G) and exerting a force on the intermediate link (Z) exercises which moves this towards the cam (N).
- This force is generated, for example, via a spring force (KF).
- KF spring force
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10162797A DE10162797A1 (de) | 2001-12-20 | 2001-12-20 | Vorrichtung zur variablen Betätigung der Ladungswechselventile in Hubkolbenmotoren |
DE10162797 | 2001-12-20 | ||
PCT/DE2002/004666 WO2003054362A1 (de) | 2001-12-20 | 2002-12-19 | Vorrichtung zur variablen betätigung der ladungswechselventile in hubkolbenmotoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1458956A1 true EP1458956A1 (de) | 2004-09-22 |
EP1458956B1 EP1458956B1 (de) | 2008-05-07 |
Family
ID=7710069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02799032A Expired - Lifetime EP1458956B1 (de) | 2001-12-20 | 2002-12-19 | Vorrichtung zur variablen betätigung der ladungswechselventile in hubkolbenmotoren |
Country Status (7)
Country | Link |
---|---|
US (1) | US7137368B2 (de) |
EP (1) | EP1458956B1 (de) |
AT (1) | ATE394585T1 (de) |
AU (1) | AU2002364271A1 (de) |
DE (2) | DE10162797A1 (de) |
ES (1) | ES2306810T3 (de) |
WO (1) | WO2003054362A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10162797A1 (de) | 2001-12-20 | 2003-07-03 | Schoen Helmut | Vorrichtung zur variablen Betätigung der Ladungswechselventile in Hubkolbenmotoren |
DE10341702A1 (de) * | 2003-09-10 | 2005-04-28 | Bayerische Motoren Werke Ag | Ventiltrieb für eine Hubkolben-Brennkraftmaschine |
DE102004053206A1 (de) * | 2004-11-04 | 2006-06-14 | Schaeffler Kg | Variable mechanische Ventilsteuerung mit zusätzlichem Hubprofil |
DE102006003002B3 (de) * | 2006-01-23 | 2007-03-08 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Ventiltrieb für Ladungswechselventile von Verbrennungsmotoren |
KR100993381B1 (ko) * | 2007-12-14 | 2010-11-09 | 기아자동차주식회사 | 연속 가변 밸브 리프트 장치 |
US20100242961A1 (en) * | 2009-03-31 | 2010-09-30 | Nellcor Puritan Bennett Llc | Systems and methods for preventing water damage in a breathing assistance system |
US9631548B2 (en) | 2012-10-16 | 2017-04-25 | Ford Global Technologies, Llc | Internal combustion engine which can be operated with liquid and with gaseous fuel and a method for operating an internal combustion engine of this kind |
US10843244B2 (en) | 2016-08-23 | 2020-11-24 | Bulldog Green Remediation, Inc. | Methods for bioremediation of hydrocarbon-contaminated media |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2629554A1 (de) | 1976-07-01 | 1978-01-12 | Daimler Benz Ag | Lastregelung fuer gemischverdichtende brennkraftmaschinen mit ventilsteuerung |
DE3833540A1 (de) | 1988-10-01 | 1990-04-12 | Peter Prof Dr Ing Kuhn | Vorrichtung zur betaetigung der ventile an verbrennungsmotoren mit veraenderlicher ventilerhebungskurve |
JP2634496B2 (ja) * | 1991-02-28 | 1997-07-23 | エヌティエヌ株式会社 | エンジンのローラ付カムフォロア |
JP2944264B2 (ja) * | 1991-07-23 | 1999-08-30 | 株式会社ユニシアジェックス | 内燃機関の動弁装置 |
DE4322449C2 (de) | 1993-07-06 | 1995-06-22 | Kuhn Peter Prof Dr Ing | Vorrichtung zur Betätigung der Ventile an Verbrennungsmotoren mit veränderlicher Ventilerhebungskurve |
DE10031783A1 (de) | 2000-07-04 | 2002-01-24 | Iav Gmbh | Variabler Ventiltrieb mit einer indirekt von einem Nocken über einen Schwing- oder Kipphebel bewegten Ventilanordnung, vorzugsweise für Verbrennungsmotoren |
DE10162797A1 (de) | 2001-12-20 | 2003-07-03 | Schoen Helmut | Vorrichtung zur variablen Betätigung der Ladungswechselventile in Hubkolbenmotoren |
-
2001
- 2001-12-20 DE DE10162797A patent/DE10162797A1/de not_active Ceased
-
2002
- 2002-12-19 ES ES02799032T patent/ES2306810T3/es not_active Expired - Lifetime
- 2002-12-19 US US10/499,187 patent/US7137368B2/en not_active Expired - Lifetime
- 2002-12-19 AT AT02799032T patent/ATE394585T1/de not_active IP Right Cessation
- 2002-12-19 WO PCT/DE2002/004666 patent/WO2003054362A1/de active IP Right Grant
- 2002-12-19 AU AU2002364271A patent/AU2002364271A1/en not_active Abandoned
- 2002-12-19 DE DE50212244T patent/DE50212244D1/de not_active Expired - Lifetime
- 2002-12-19 EP EP02799032A patent/EP1458956B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03054362A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10162797A1 (de) | 2003-07-03 |
US7137368B2 (en) | 2006-11-21 |
ES2306810T3 (es) | 2008-11-16 |
DE50212244D1 (de) | 2008-06-19 |
WO2003054362A1 (de) | 2003-07-03 |
ATE394585T1 (de) | 2008-05-15 |
US20050028765A1 (en) | 2005-02-10 |
EP1458956B1 (de) | 2008-05-07 |
AU2002364271A1 (en) | 2003-07-09 |
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