EP1649148A1 - Control device for a valve, particularly a gas exchange valve of an internal combustion engine - Google Patents
Control device for a valve, particularly a gas exchange valve of an internal combustion engineInfo
- Publication number
- EP1649148A1 EP1649148A1 EP05766972A EP05766972A EP1649148A1 EP 1649148 A1 EP1649148 A1 EP 1649148A1 EP 05766972 A EP05766972 A EP 05766972A EP 05766972 A EP05766972 A EP 05766972A EP 1649148 A1 EP1649148 A1 EP 1649148A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve lift
- control device
- valve
- cam
- cam profiles
- 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 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract 3
- 230000010363 phase shift Effects 0.000 claims description 10
- 229920000136 polysorbate Polymers 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 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
- 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
- F01L1/08—Shape of cams
-
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- 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
-
- 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
-
- 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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Definitions
- Control device for a valve in particular a Gaswech ⁇ selventil an internal combustion engine
- the invention relates to a control device for actuating at least one valve, in particular a Gas sweepingven- tiles an internal combustion engine, wherein the Ventilhubbewe ⁇ movement of the at least one valve by a superposition of at least two synchronously rotating, mechanically acting on a Hubbetuschistselement cam profiles, namely a first cam profile and a generated second cam profile and can be changed by phase shift between these two cam profiles.
- hydraulically / mechanically operating combination devices from, for example, WO 00/31385 are known. With those devices, it is possible to produce various additional valve lift curves to a main valve lift curve.
- This combined mechanical / hydraulic device has an extremely complicated structure with a large number of functional elements and a high susceptibility to interference associated therewith.
- the invention is concerned with the problem of the control device according to the earlier mentioned patent application.
- PCT / DE 2004/000079 to form a device with at least the possibilities of the mechanical / hydraulic control device according to WO 00/31385.
- the device to be created according to the invention is intended to be used, for example, for the braking operation of a combustion engine of a motor vehicle as well as for a vehicle internal combustion engine for an internal engine charge by fresh air or exhaust gas or for displaying new combustion processes and for internal exhaust gas recirculation again the aforementioned internal combustion engines.
- a valve control device must be able to generate certain additional valve lifts for a main valve lift with reference to a full revolution of a cam profile.
- the invention is based on the general idea, in a control device in which the lifting movement of a valve is generated by a Hubbetuschistselement on the at least two synchronously rotating cam profiles ge together for a superposition of the cam profile curves einwir ⁇ ken, the cam profiles so with Profile curves to be superimposed on the lifting element with respect to its movement, such that each cam profile revolution, in addition to a main valve lifting curve determining the stroke movement, has additional valve lift curves of arbitrary shape and association with one another and opposite one another the main survey curve can be generated. It is thereby possible, starting from desired valve lift curves, to generate corresponding cam profile shapes by means of corresponding, conventional mathematical generation methods.
- FIG. 2 shows two synchronously rotating cam profiles (part b, part c) intended for the common actuation of a lifting actuating element, with a depiction of the profile curves of these two cam profiles (part d) superimposed on the lifting actuating element Phase position Po and the valve lift curve that can be achieved by these cam profiles with respect to the valve lift movement, with a main valve lift curve (HV) and an additional valve lift curve (ZV) (part a),
- HV main valve lift curve
- ZV additional valve lift curve
- FIG. 3 shows an identical illustration derived from FIG. 2 for phase-shifted cam signals. profile at a first phase shift by a value Pl,
- FIG. 4 shows an identical illustration derived from FIG. 2 for mutually phase-shifted cam profiles during a second phase shift by a value P2, FIG.
- FIGS. 2 to 4 are illustrations as in FIGS. 2 to 4 for an ⁇ dersartig shaped cam profiles with each shown in the same drawing under ⁇ different phase shift positions zwi ⁇ tween the two cam profiles,
- FIG. 6 shows a depiction corresponding to FIG. 5 for differently shaped cam profiles
- FIG. 7 shows a depiction corresponding to FIGS. 5, 6 for further different cam profile shapes.
- Fig. 8 is a consistent with Figs. 5, 6 and 7 representation for further different cam profile shapes.
- Valve control device Two synchronously rotating and mutually phase-adjustable camshaft having a first and second cam profile 1 and 2 actuate a designed as a lever with two contact rollers intermediate element in the form of Hubbet2011i ⁇ transmission element 4, which the resulting adjustment over a bearing axis on a power transmission lever 5 ü- transmits, the actuated via a lash adjuster 9 a valve.
- the lever 5 is pressed against a stop 8 when the valve 6 is closed.
- a spring 7 ensures that the Hubbetuschistselement 4 is always applied via a contact roller on the cam profile 1.
- the phase angle of the two Nockenpro ⁇ file 1 and 2 is mutually variable.
- valve movements achievable with the shapes of the cam profiles 1 and 2 shown in FIGS. 2 b and 2 c are explained on the basis of the illustrations in FIGS. 2 a to 4 a.
- FIGS. 2b and 2c show the two synchronously rotating nose profiles 1 and 2 in cross section.
- cam profiles 1, 2 have a basic shape for the generation of a valve stroke movement after a main valve lift curve and a superimposed shape for the Er ⁇ generation of an additional stroke movement after an additional valve lift curve.
- These additional forms in the cam profiles 1 and 2 are shown in FIG. 2b in the first cam profile 1 with 1 'and in FIG. 2c in the second cam profile 2 with 2 'registered.
- These two cam lobes 1 ', 2' are designed for a mutual superimposition with a resulting loading of the lifting actuating element 4 according to, for example, FIG. 1.
- the profile curves of the cam profiles 1 and 2 are shown together for a cam profile revolution in FIG. 2d and correspondingly denoted by 1 and 2 in a phase position Po of the cam profiles as indicated in FIG. 2c.
- FIGS. 3 and 4 each show a phase shift between the two cam profiles 1 and 2 by respectively one rotation of the second cam profile 2 relative to the first cam profile 1, specifically by the phase angle Pl in FIG and the phase angle P2 in FIG. 4, by means of which, according to the illustrations in FIGS. 3 and 4, different additional valve lift curves ZV are produced.
- the phase adjustment between the two cam profiles 1 and 2 is here only by way of example by the rotation of the second cam profile 2 with respect to the first cam profile. 1 and of course can also be realized by Verdre ⁇ hung the first cam profile 1 relative to the second No ⁇ ckenprofil 2 or by rotation of both cam profiles in the same direction or in opposite directions by the same or gar Kunststoffli ⁇ che adjustment angle. Any further adjustment not mentioned here should be applicable to a control device according to the invention.
- the main valve lift is generated by-in this example-the cam lift of the first cam profile 1 and the maximum stroke range of the cam profile 2.
- the main valve lift is independent of the phase position of the second cam profile 2 in relation to the first cam profile 1.
- the positive elevation 1 'of the first cam profile and the negatively inwardly directed recess 2' in the second cam profile 2 cancel each other by superposition, as can be seen from FIG. 3a.
- cam profile shapes of the two cam profiles 1, 2 are shown in which, taking into account a total of three different phase positions of the two cam profiles 1, 2 to each other, the three valve lift curves shown in Fig. 5a result, that is, a main valve lift curve HV and two Additional valve lift curves ZV.
- the profile curves of the cam profiles 1 and 2 in FIG. 5d result from the corresponding cam profile shapes from FIG. 5b and FIG. 5c.
- FIGS. 6, 7 and 8 are constructed in the same way as the representation in FIG. 5 and differ from FIG. 5 only by different shapes of the cam profiles 1, 2 and resulting different valve lift curves in Fig. ⁇ a, 7a and Fig. 8a.
- the type of generation of the valve lift curves by the two cam profiles 1, 2 described with reference to the examples according to FIGS. 6 and 8 is particularly advantageous. This means that in principle the increasing and decreasing cam profile areas of the two cam profiles 1 and 2 can be pulled up and in particular also intended to produce the main valve lift curve.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004034710 | 2004-07-17 | ||
PCT/DE2005/001218 WO2006007817A1 (en) | 2004-07-17 | 2005-07-12 | Control device for a valve, particularly a gas exchange valve of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1649148A1 true EP1649148A1 (en) | 2006-04-26 |
EP1649148B1 EP1649148B1 (en) | 2006-12-13 |
Family
ID=35134440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05766972A Active EP1649148B1 (en) | 2004-07-17 | 2005-07-12 | Control device for a valve, particularly a gas exchange valve of an internal combustion engine |
Country Status (6)
Country | Link |
---|---|
US (1) | US7311072B2 (en) |
EP (1) | EP1649148B1 (en) |
JP (1) | JP2008506878A (en) |
CN (1) | CN1839250B (en) |
DE (2) | DE502005000233D1 (en) |
WO (1) | WO2006007817A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2447466A (en) * | 2007-03-13 | 2008-09-17 | Mechadyne Plc | Variable valve system for an internal combustion engine |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006021933A1 (en) * | 2006-05-11 | 2007-11-15 | Schaeffler Kg | Drag lever system for use in cylinder head of internal combustion engine, has outer lever including side walls with supporting surfaces for respective opposing surfaces so that start-up unit of inner lever is held at distance to lifting cam |
GB2449096A (en) * | 2007-05-10 | 2008-11-12 | Mechadyne Plc | Variable valve actuating system for i.c. engines |
GB2456760B (en) | 2008-01-22 | 2012-05-23 | Mechadyne Plc | Variable valve actuating mechanism with lift deactivation |
CN101581238B (en) * | 2008-05-13 | 2013-07-17 | 麦加戴恩公共有限公司 | Variable valve driving system for internal combustion engine |
WO2010096437A2 (en) | 2009-02-17 | 2010-08-26 | Cummins Inc. | Variable valve actuation apparatus, system, and method |
GB0920152D0 (en) * | 2009-11-18 | 2009-12-30 | Camcon Ltd | Rotary electromagnetic actuator |
US9765658B2 (en) | 2011-03-02 | 2017-09-19 | Delphi Technologies, Inc. | Valve train system for an internal combustion engine |
CN103422923B (en) * | 2013-08-27 | 2015-10-28 | 上海理工大学 | There is the double peak cam design method of diesel exhaust recirculation function |
DE102016201499B4 (en) * | 2016-02-01 | 2021-03-11 | Mtu Friedrichshafen Gmbh | Valve drive for an internal combustion engine, internal combustion engine with such a valve drive, and method for operating a valve drive |
WO2018065053A1 (en) | 2016-10-06 | 2018-04-12 | Volvo Truck Corporation | An internal combustion engine and a method for controlling a braking torque of the engine |
SE541865C2 (en) * | 2017-03-22 | 2020-01-02 | Scania Cv Ab | Four-stroke internal combustion engine and thereto related vehicle and method |
DE102017205034B4 (en) * | 2017-03-24 | 2021-12-02 | Mtu Friedrichshafen Gmbh | Method for operating an internal combustion engine and an internal combustion engine |
Family Cites Families (21)
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US555860A (en) * | 1896-03-03 | Shampooing attachment for barbers chairs | ||
DE2638651A1 (en) | 1976-08-27 | 1978-03-02 | Franc Lopic | IC engine with additional exhaust valve cam - has exhaust valve re-activated during induction stroke |
DE3006619A1 (en) | 1980-02-22 | 1981-08-27 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Control mechanism for inlet valve to IC engine combustion chamber - has rocker arm acted on by two rotating cams with relatively adjustable angular positions |
GB2180597A (en) | 1985-09-13 | 1987-04-01 | Frederick Arthur Summerlin | Valve control |
JPS62203913A (en) * | 1986-02-28 | 1987-09-08 | Fuji Heavy Ind Ltd | Tappet valve device for automobile engine |
SE466320B (en) * | 1989-02-15 | 1992-01-27 | Volvo Ab | PROCEDURES AND DEVICE FOR ENGINE BRAKING WITH A FIREWORKS ENGINE |
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 |
US5555860A (en) * | 1991-04-24 | 1996-09-17 | Wride; Donald C. | Valve control mechanism |
JPH08170551A (en) * | 1994-12-16 | 1996-07-02 | Mitsubishi Motors Corp | Diesel engine |
DE19501386C2 (en) | 1995-01-18 | 1998-12-10 | Meta Motoren Energietech | Method for controlling a spark-ignited piston internal combustion engine equipped with a fuel injection system |
US6125828A (en) | 1995-08-08 | 2000-10-03 | Diesel Engine Retarders, Inc. | Internal combustion engine with combined cam and electro-hydraulic engine valve control |
DE19600536C2 (en) | 1996-01-09 | 2002-08-22 | Meta Motoren Energietech | Device for variably controlling an intake valve |
DE19733322A1 (en) | 1997-08-01 | 1999-02-04 | Mwp Mahle J Wizemann Pleuco Gm | Valve control of an internal combustion engine that can be switched as a drive or brake |
DE19802738A1 (en) * | 1998-01-26 | 1999-07-29 | Opel Adam Ag | Variable control device for valve of internal combustion engine |
JP2001090514A (en) * | 1999-09-24 | 2001-04-03 | Toyota Motor Corp | Internal combustion engine |
JP2001098913A (en) * | 1999-10-04 | 2001-04-10 | Hino Motors Ltd | Compression pressure reliesing type engine brake |
JP2002309918A (en) | 2001-04-17 | 2002-10-23 | Otics Corp | Variable valve system |
JP4046487B2 (en) | 2001-06-14 | 2008-02-13 | 株式会社オティックス | Variable valve mechanism |
JP3995913B2 (en) * | 2001-10-09 | 2007-10-24 | 株式会社オティックス | Variable valve mechanism |
DE10303601A1 (en) * | 2003-01-30 | 2004-08-12 | Mahle Ventiltrieb Gmbh | valve control |
-
2005
- 2005-07-12 EP EP05766972A patent/EP1649148B1/en active Active
- 2005-07-12 DE DE502005000233T patent/DE502005000233D1/en active Active
- 2005-07-12 US US10/574,000 patent/US7311072B2/en active Active
- 2005-07-12 DE DE112005000030T patent/DE112005000030D2/en not_active Expired - Fee Related
- 2005-07-12 CN CN2005800007809A patent/CN1839250B/en active Active
- 2005-07-12 WO PCT/DE2005/001218 patent/WO2006007817A1/en active IP Right Grant
- 2005-07-12 JP JP2007520657A patent/JP2008506878A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2006007817A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2447466A (en) * | 2007-03-13 | 2008-09-17 | Mechadyne Plc | Variable valve system for an internal combustion engine |
US7870841B2 (en) | 2007-03-13 | 2011-01-18 | Mechadyne Plc | Variable valve actuation system for an internal combustion engine |
GB2447466B (en) * | 2007-03-13 | 2011-11-16 | Mechadyne Plc | Variable valve actuation system for an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP1649148B1 (en) | 2006-12-13 |
DE112005000030D2 (en) | 2006-10-05 |
US7311072B2 (en) | 2007-12-25 |
WO2006007817A1 (en) | 2006-01-26 |
JP2008506878A (en) | 2008-03-06 |
US20070039577A1 (en) | 2007-02-22 |
CN1839250B (en) | 2011-01-05 |
DE502005000233D1 (en) | 2007-01-25 |
CN1839250A (en) | 2006-09-27 |
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