EP1974131A1 - Gas exchange valve actuating device - Google Patents
Gas exchange valve actuating deviceInfo
- Publication number
- EP1974131A1 EP1974131A1 EP07702753A EP07702753A EP1974131A1 EP 1974131 A1 EP1974131 A1 EP 1974131A1 EP 07702753 A EP07702753 A EP 07702753A EP 07702753 A EP07702753 A EP 07702753A EP 1974131 A1 EP1974131 A1 EP 1974131A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas exchange
- exchange valve
- actuating device
- engine brake
- valve actuating
- 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 claims abstract description 21
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000010705 motor oil Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 241000309551 Arthraxon hispidus Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil 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
- F01L13/06—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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
-
- 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
-
- 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
- F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
Definitions
- the invention relates to a
- Gas exchange valve actuator an engine brake unit.
- the engine brake unit is via a
- Hydraulic unit and coupled via a movably guided in a valve web valve pin with one of the gas exchange valves.
- the invention is in particular the object of providing a generic gas exchange valve actuating device, which allows a particularly compact design.
- the object is solved by the features of patent claim 1, wherein further embodiments of the invention can be taken from the subclaims.
- the invention is based on a
- Gas exchange valve actuating device with a lever for transmitting a drive movement to at least one gas exchange valve and with an internal combustion engine brake unit. It is suggested that the
- Internal combustion engine brake unit is coupled at least in a braking mode in terms of drive technology with the lever.
- the term "drive-coupled” should be understood to mean that the lever is used in at least one braking mode by the engine brake unit as a force transmission means in order to actuate at least one gas exchange valve.
- Existing components can be used advantageously, and it can be saved additional components, space, weight and installation costs, especially when the lever is provided to actuate at least two gas exchange valves. If the lever is provided to actuate at least two gas exchange valves, moreover, an advantageously identical stroke and equal control times of the corresponding gas exchange valves can be achieved.
- the lever may be formed by various levers that appear appropriate to those skilled in the art, which are pivotally guided with a fixed bearing axis or without space-fixed bearing axis, in particular tilt or rocker arms.
- the term "intended” should be understood to mean in particular specially equipped and / or designed.
- the engine brake unit comprises a hydraulic unit for transmitting a drive movement to the gas exchange valve, whereby particularly flexible and space-saving large forces can be transmitted structurally simple.
- other power transmission units which appear reasonable to the person skilled in the art are also conceivable, such as in particular purely mechanical, electromechanical and / or electromagnetic power transmission units, etc.
- the engine brake unit comprises a one-piece housing unit having at least one bearing point for a slave piston and at least one bearing point for a master piston of the hydraulic unit, and in particular if the housing unit at least in addition at least one bearing point for a Having valve means.
- the hydraulic unit of the engine brake unit could be partially or completely integrated in a camshaft housing and / or in a cylinder head.
- a stroke of the gas exchange valve desired for a brake mode can advantageously be designed to be particularly flexible and precisely adjustable.
- the engine brake unit has a roller follower comprising a cam follower, whereby a particularly low friction can be achieved, in particular during a braking mode.
- a cam follower with a sliding element for coupling to a cam.
- the friction and associated losses can be reduced by the engine brake unit decoupled from the lever in at least one operating mode and / or the engine brake unit is decoupled in at least one operating mode by a drive means, such as in particular a cam.
- a drive means such as in particular a cam.
- Internal combustion engine unit for driving the lever or a part of the internal combustion engine unit moved by a drive means is decoupled from the movement of the lever or from the movement of the drive means in the at least one mode different from the brake mode.
- the engine brake unit has a brake cam with at least two elevations
- Freedom of design of a braking mode increases and, in particular, a braking process can be optimized.
- the engine brake unit has at least one control and / or regulating means which is provided for actuating gas exchange valves associated with at least two differentiating engine cylinders, which in turn can save additional components, installation space, assembly costs and costs.
- FIG. 1 shows a detail of an internal combustion engine with an inventive Gas exchange valve actuating device obliquely from above
- Fig. 2 shows a housing unit of an internal combustion engine brake unit of the gas exchange valve actuator of Figure 1 with further stored therein
- FIG. 4 is a schematic diagram of the hydraulic circuit
- FIG. 5 shows a cross section through the
- FIG. 1 shows a detail of an internal combustion engine with an inventive system
- Gas exchange valve actuator obliquely from above.
- the gas exchange valve actuating device comprises a fork-shaped rocker arm 10 for transmitting a drive movement from an exhaust cam 25 arranged on an exhaust camshaft 28 to two gas exchange valves 11, 12 which form exhaust valves.
- the rocker arm 10 is pivotally mounted on a fixed bearing axis 26 and is coupled via a cam follower formed by a rolling element 27 with the exhaust cam 25.
- gas exchange valve actuating unit comprises a hydraulic unit comprehensive
- the engine brake unit 13 which in a braking mode is drivingly coupled to the rocker arm 10 (FIGS 2 to 6).
- the engine brake unit 13 has a one-piece housing unit 15, which has a bearing point 16 for a slave piston 17, a bearing point 18 for a master piston 19 and a bearing point 20 for a valve means 21 formed by a control valve.
- the slave piston 17 is along a movement axis 30, the master piston 19 is guided along a movement axis 31 and the valve means 21 is movable along a movement axis 32, the movement axes 30, 31, 32 each perpendicular to an axis 29 of the housing unit 15 and tilted towards each other are.
- the pistons 17, 19 and the valve means 21 are connected to each other via hydraulic channels 33 of the housing unit 15.
- the housing unit 15 has a supply channel 34, via which and via a central control means 24 formed by a magnetic valve, the valve means 21 and the pistons 17, 19 can be coupled to an engine oil circuit 35 and pressurized with engine oil (FIGS)
- the control means 24 is provided for the actuation of a plurality of gas turbine valves 11, 12 assigned to differing engine cylinders.
- the slave piston 17 When the brake mode is deactivated or in a drive mode of the internal combustion engine, the slave piston 17 is spaced from a brake cam 23 forming a drive means of the engine brake unit 13 and the master piston 17 is spaced from the rocker arm 10 or the engine brake unit 13 is in motion of the brake cam 23 and the movement of the rocker arm 10 decoupled ( Figures 4 to 6).
- control means 24 If the braking mode is activated, the control means 24 is moved from its blocking position shown in FIG. 4 by means of an electromagnet 43 against a spring force of a Spring element 44 connected in its flow position.
- Valve means 21 is pressurized and thereby switches due to its blocking position shown in Figure 4 against a spring force of a spring element 45 in its flow position, so that via a valve means 21 integrated check valve 36 pressure chambers 37, 38 of the housing unit 15 are acted upon by engine oil and the Slave piston 17 in the direction of the brake cam 23 and the master piston 19 in the direction of the rocker arm 10 are charged. As a result, the slave piston 17 applies a braking surface 39 to the brake cam 23, which has a plurality of elevations. Instead of a sliding surface 39, the
- Internal combustion engine brake unit 13 may also be formed with a roller follower comprising a cam follower 22, as indicated in FIG.
- the master piston 19 is partially in one piece with a hydraulic Hubbegrenzungsaku 14 of
- the Hubbegrenzungsussi 14 includes a return spring 40 which loads the master piston 19 in the direction away from the rocker arm 10 and the master piston 19 facing away with a rocker arm 10 end face against a side facing away from the rocker arm 10 side, spring-loaded in the direction of the rocker arm 10 closure means 41st suppressed.
- the closure means 41 closes a channel 42 in the master piston 19.
- the slave piston 17 slides on a base circle of the brake cam 23, the master piston 19 is held by the return spring 40 in its position facing away from the rocker arm 10. If the slave piston 17 is deflected by one of the elevations of the brake cam 23 in the direction away from the brake cam 23, the master piston 19 is displaced in the direction of the rocker arm 10 and bears against a joint head 46 of an adjusting screw 47 fastened in the rocker arm 10 (FIG. 6). About the adjusting screw 47, the engine unit 13 and a brake play can be adjusted. Subsequently, the rocker arm 10 is driven via the master piston 19 and the gas exchange valves 11, 12 are opened.
- the solenoid 43 is deactivated and the control means 24 is - driven by the spring force of the spring element 44 - moved to its blocking position. Due to the pressure drop at the valve means 21, the same is also displaced by the spring force of the spring element 45 in its blocking position. In the blocking position of the valve means 21, a connection between the engine oil circuit 35 and the pressure chambers 37, 38 is interrupted. Furthermore, the pressure chambers 37, 38 on the Valve means 21 connected to a tank 48, so that the
- Engine oil from the pressure chambers 37, 38 can flow.
- the slave piston 17 is displaced by the brake cam 23 in its the brake cam 23 remote end position and the master piston 19 is moved by the spring force of the return spring 40 in its the toggle lever 10 opposite end position.
- Control means 5 Exhaust cam 47 Adjustment screw 6 Bearing axis 48 Tank 7 Rolling element 8 Exhaust camshaft 9 Axis 0 Movement axis 1 Movement axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006002145A DE102006002145A1 (en) | 2006-01-17 | 2006-01-17 | Gas exchange valve actuating device |
PCT/EP2007/000281 WO2007082700A1 (en) | 2006-01-17 | 2007-01-13 | Gas exchange valve actuating device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1974131A1 true EP1974131A1 (en) | 2008-10-01 |
EP1974131B1 EP1974131B1 (en) | 2011-09-07 |
Family
ID=37904880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07702753A Active EP1974131B1 (en) | 2006-01-17 | 2007-01-13 | Gas exchange valve actuating device |
Country Status (7)
Country | Link |
---|---|
US (1) | US7827958B2 (en) |
EP (1) | EP1974131B1 (en) |
JP (1) | JP5184372B2 (en) |
KR (1) | KR101001809B1 (en) |
CN (1) | CN101371012B (en) |
DE (1) | DE102006002145A1 (en) |
WO (1) | WO2007082700A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7971569B2 (en) * | 2008-07-31 | 2011-07-05 | Jacobs Vehicle Systems, Inc. | Bias system for dedicated engine braking rocker arm in a lost motion system |
DE102014008378A1 (en) * | 2014-06-05 | 2015-12-17 | Daimler Ag | Engine braking device for an internal combustion engine |
CN107636267B (en) | 2015-05-18 | 2020-07-28 | 伊顿(意大利)有限公司 | Rocker arm with oil drain valve as accumulator |
DE102017009541A1 (en) * | 2017-10-13 | 2019-04-18 | Daimler Ag | Valve drive for an internal combustion engine of a motor vehicle |
EP3935271A4 (en) * | 2019-05-10 | 2022-12-14 | Cummins, Inc. | Valve train system for extended duration intake valve opening |
WO2023143874A1 (en) * | 2022-01-31 | 2023-08-03 | Eaton Intelligent Power Limited | Integrated rocker for high power engine braking |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4711210A (en) * | 1986-12-29 | 1987-12-08 | Cummins Engine Company, Inc. | Compression braking system for an internal combustion engine |
US5000145A (en) * | 1989-12-05 | 1991-03-19 | Quenneville Raymond N | Compression release retarding system |
US5036810A (en) * | 1990-08-07 | 1991-08-06 | Jenara Enterprises Ltd. | Engine brake and method |
US5540201A (en) * | 1994-07-29 | 1996-07-30 | Caterpillar Inc. | Engine compression braking apparatus and method |
JPH09133031A (en) * | 1995-11-13 | 1997-05-20 | Mitsubishi Motors Corp | Compression opening type engine auxiliary brake device |
JP3360533B2 (en) | 1996-07-10 | 2002-12-24 | 三菱自動車エンジニアリング株式会社 | Engine valve train |
JPH10110634A (en) * | 1996-10-08 | 1998-04-28 | Mitsubishi Motors Corp | Engine auxiliary braking device |
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 |
WO1999025970A1 (en) * | 1997-11-14 | 1999-05-27 | Diesel Engine Retarders, Inc. | Lost motion hydraulic overhead with integrated retarding |
US6647954B2 (en) * | 1997-11-17 | 2003-11-18 | Diesel Engine Retarders, Inc. | Method and system of improving engine braking by variable valve actuation |
US6386160B1 (en) * | 1999-12-22 | 2002-05-14 | Jenara Enterprises, Ltd. | Valve control apparatus with reset |
JP3411882B2 (en) * | 2000-04-04 | 2003-06-03 | 日野自動車株式会社 | Compression release type engine brake |
IT1320054B1 (en) * | 2000-04-18 | 2003-11-12 | Iveco Fiat | ASSEMBLY FOR THE CREATION OF A MOTOR BRAKE SYSTEM FOR AN ENDOTHERMAL ENGINE, IN PARTICULAR FOR AN INDUSTRIAL VEHICLE, AND |
US6854433B2 (en) * | 2002-04-05 | 2005-02-15 | Jacobs Vehicle Systems, Inc. | Integrated primary and auxiliary valve actuation system |
CN100420838C (en) * | 2002-04-08 | 2008-09-24 | 柴油发动机减震器有限公司 | Compact lost motion system for variable valve actuation |
US7152576B2 (en) * | 2002-04-08 | 2006-12-26 | Richard Vanderpoel | Compact lost motion system for variable value actuation |
US6694933B1 (en) * | 2002-09-19 | 2004-02-24 | Diesel Engine Retarders, Inc. | Lost motion system and method for fixed-time valve actuation |
DE10303567A1 (en) * | 2003-01-30 | 2004-08-12 | Daimlerchrysler Ag | Hydraulic driver rocker arm |
KR20060129345A (en) * | 2003-12-30 | 2006-12-15 | 자콥스 비히클 시스템즈, 인코포레이티드. | System and method for valve actuation |
US20050274341A1 (en) * | 2004-05-14 | 2005-12-15 | Usko James N | Rocker arm system for engine valve actuation |
-
2006
- 2006-01-17 DE DE102006002145A patent/DE102006002145A1/en not_active Withdrawn
-
2007
- 2007-01-13 KR KR1020087015843A patent/KR101001809B1/en not_active IP Right Cessation
- 2007-01-13 EP EP07702753A patent/EP1974131B1/en active Active
- 2007-01-13 WO PCT/EP2007/000281 patent/WO2007082700A1/en active Application Filing
- 2007-01-13 CN CN2007800025331A patent/CN101371012B/en active Active
- 2007-01-13 JP JP2008549843A patent/JP5184372B2/en active Active
-
2008
- 2008-07-16 US US12/218,622 patent/US7827958B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007082700A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101371012A (en) | 2009-02-18 |
US7827958B2 (en) | 2010-11-09 |
DE102006002145A1 (en) | 2007-07-19 |
JP2009529615A (en) | 2009-08-20 |
US20090071436A1 (en) | 2009-03-19 |
KR20080079660A (en) | 2008-09-01 |
EP1974131B1 (en) | 2011-09-07 |
KR101001809B1 (en) | 2010-12-15 |
WO2007082700A1 (en) | 2007-07-26 |
CN101371012B (en) | 2011-10-19 |
JP5184372B2 (en) | 2013-04-17 |
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