EP1143121A2 - Motorbremseinrichtung mit verschiebbarer Kipphebelschwenkachse - Google Patents
Motorbremseinrichtung mit verschiebbarer Kipphebelschwenkachse Download PDFInfo
- Publication number
- EP1143121A2 EP1143121A2 EP01105766A EP01105766A EP1143121A2 EP 1143121 A2 EP1143121 A2 EP 1143121A2 EP 01105766 A EP01105766 A EP 01105766A EP 01105766 A EP01105766 A EP 01105766A EP 1143121 A2 EP1143121 A2 EP 1143121A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- piston
- shaft
- rocker
- engages
- 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
- 230000001419 dependent effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Images
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
- F01L1/26—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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- 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
- the invention relates to an engine brake device with a rocker arm arranged pivotably on a shaft, one in a piston chamber arranged piston, the position of one controlled by a pressure control device and on pressure is dependent on it, with a movement of the Piston shifting the pivot axis of the rocker arm causes.
- engine brake devices are known.
- One type of engine brake device is a freewheel element provided in one end of a rocker arm or in connections, that connect the rocker arm to a cam or valve, to allow a control mechanism to target an area react to the cam profile or ignore it.
- a another type of engine brake device is disclosed in US-A-5,647,319 and shown in US-A-3,367,312. Both engine braking devices have a braking mechanism in which a Swivel center of an outlet rocker arm through an eccentric is shifted or postponed, which with a Hydraulic piston / actuator is connected via a lever arm.
- an engine brake device is available which is simple in construction, since it is only a small one Has number of components. Most of these components need not have increased requirements regarding the Manufacturing tolerances meet and are not increased Loads particularly in the type of bending stress exposed. Such a system has a reduced Complexity and is therefore inexpensive and insensitive to errors. Due to the lower number of components and the waiver of additional levers or connections Height of a drive with an inventive Engine brake device not or only slightly increased.
- the projection has a convex Surface, which with an appropriately trained Surface of the piston, which is preferably concave is cooperating.
- the displacement of the rocker arm or its pivot axis can be achieved in that a hole in the rocker arm has a larger diameter than the shaft on which it is arranged.
- the relocation option is thereby limited that the rocker arm or its bore on at least in substantially opposite sides of the shaft in Depending on the position of the piston come to rest can.
- an engine brake device (compression braking system) 10 shown which a Exhaust valve rocker arm 12 pivotable via a rocker arm shaft or shaft 14, which is supported by a rocker arm shaft bore or a bore 15 is received.
- the shaft 14 has one Diameter, which by a small amount, like for example, 7.62 mm (0.030 inches), is smaller than that Hole 15.
- One end of rocker arm 12 carries a roller 16, which on a camshaft 18 with a molded Freewheel cam 20 attacks.
- the other end of the rocker arm 12 engages an exhaust valve stem assembly 22. Because of the bias of the springs of the valve stem assembly 22 the rocker arm 12 normally abuts a bottom the shaft 14 held, as can be seen from the figure can.
- the rocker arm 12 has a projection 24 which extends away from him.
- the projection 24 has one partially cylindrical convex outer surface 26.
- On Piston 28 engages the projection 24 and has one cylindrical concave surface 29, which with the convex Surface 26 of projection 24 is
- the piston 28 is displaceable in a piston bore 30 added, which is provided in a housing 32, which preferably part of a cylinder block of a diesel drive (not shown).
- the piston 28 and a wall of the Piston bore 30 enclose a pressure chamber 34.
- the pressure in the pressure chamber 34 is preferably by a Pressure control unit 36 controlled, which preferably also is arranged in the housing 32, as it is from "FAQs: Engine Brake Theory, "by Jacobs Vehicle Systems, in 1996.
- the pressure control unit 36 preferably has a solenoid valve not shown), and the application of the solenoid valve is controlled by a switch 46 operated by an operator can be operated, controlled, which preferably with a Vehicle battery 48 via a fuel pump switch 50, a clutch switch 52 and a fuse 54 is connected. Pressurization of the pressure chamber 34 causes the Piston 28 moves in the direction of the shaft 14 and thereby one central area of the rocker arm 12 moves until the wall of the Bore 15 engages an upper part of the shaft 14 so that the pivot axis of the rocker arm 12 is shifted.
- this engine brake device 10 uses electronically controlled hydraulic elements to the Pivot position of the rocker arm 12 for decelerating the drive or To control braking.
- a control of the swivel position of the Rocker arm 12 allows some or all of it Exhaust cam profile / movement of the camshaft 18 to the valve stem assembly 22 to be transmitted.
- the selected one Transmission of part or all of the exhaust cam movement to the valves determined in connection with the fuel supply level of the drive the ability of the drive positive Generate power or absorb (braking) power.
- Expansion of the piston 28 moves the rocker arm pivot point transversely to its axis so that the rocker arm 12 is selective react to the movement of the freewheel cam 20 or this can ignore.
- the pressure on the piston 28 can be controlled be so that the piston 28 selectively a light force or a very large force on the rocker arm 12, so that the The pivot point of the rocker arm 12 is controlled.
- a minor one Piston force allows the rocker arm 12 in its normal position to work when the drive (not shown) -under load located. This normal position prevents the rocker arm 12 to respond to the freewheel cam 20 and forces on the Valve stem assembly 22 to transfer because of the freewheel cam 20 is small enough to "lose" in the valve clearance.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims (5)
- Motorbremseinrichtung (10) mit einem schwenkbar auf einer Welle (14) angeordneten Kipphebel (12), sowie einem Kolben (28), dessen Stellung druckabhängig ist und durch eine Drucksteuerungseinrichtung (36) bestimmt wird, wobei der Kolben (28) derart wirksam mit dem Kipphebel (12) verbunden ist, daß eine Bewegung des Kolbens (28) eine Verlagerung der Schwenkachse des Kipphebels (12) bewirkt, dadurch gekennzeichnet, daß der Kolben (28) einen Endbereich (24) aufweist, welcher direkt an dem Kipphebel (12) angreift.
- Motorbremseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Kipphebel (12) einen Vorsprung (24) aufweist, der an dem Endbereich des Kolbens (28) angreift.
- Motorbremseinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Vorsprung (24) eine zumindest im wesentlichen konvex ausgebildete Oberfläche (26) aufweist, welche mit einer vorzugsweise wenigstens annähernd konkav ausgebildeten Oberfläche (29) des Kolbens (28) zusammenwirkt.
- Motorbremseinrichtung nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Kipphebel (12) in einem ersten Betriebsmodus in an einem ersten Bereich der Welle (14) anliegt und durch eine Bewegung des Kolbens (28) in Anlage mit einem zweiten, vorzugsweise zumindest im wesentlichen gegenüberliegenden Bereich der Welle (14) gelangen kann.
- Motorbremseinrichtung nach Anspruch 4, dadurch gekennzeichnet das der erste Bereich an einer Unterseite der Welle (14) und der zweite Bereich on einer Oberseite der Welle (14) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US528936 | 1990-05-25 | ||
| US09/528,936 US6213091B1 (en) | 2000-03-21 | 2000-03-21 | Engine compression brake system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1143121A2 true EP1143121A2 (de) | 2001-10-10 |
| EP1143121A3 EP1143121A3 (de) | 2001-10-24 |
| EP1143121B1 EP1143121B1 (de) | 2005-06-08 |
Family
ID=24107828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01105766A Expired - Lifetime EP1143121B1 (de) | 2000-03-21 | 2001-03-08 | Motorbremseinrichtung mit verschiebbarer Kipphebelschwenkachse |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6213091B1 (de) |
| EP (1) | EP1143121B1 (de) |
| AT (1) | ATE297499T1 (de) |
| CA (1) | CA2322988A1 (de) |
| DE (1) | DE50106426D1 (de) |
| ZA (1) | ZA200102329B (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723055A (zh) * | 2013-11-13 | 2016-06-29 | 戴姆勒股份公司 | 内燃机用发动机制动装置 |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743384B (zh) | 2007-06-01 | 2012-09-05 | 雅各布斯车辆系统公司 | 可变气门驱动系统 |
| US8746190B2 (en) | 2010-11-15 | 2014-06-10 | Achates Power, Inc. | Two stroke opposed-piston engines with compression release for engine braking |
| WO2013058802A1 (en) | 2011-02-23 | 2013-04-25 | Achates Power Inc. | Two stroke, opposed-piston engines with engine braking |
| CN103775154B (zh) * | 2014-01-26 | 2016-01-20 | 天津大学 | 一种液压式可变气门摇臂系统 |
| US10024247B2 (en) * | 2015-03-25 | 2018-07-17 | Cummins Inc. | Engine brake lever |
| US9429049B2 (en) | 2015-05-11 | 2016-08-30 | Caterpillar Inc. | Intake valve actuation system for dual fuel engine |
| CN107143394B (zh) * | 2017-05-27 | 2023-05-12 | 东风商用车有限公司 | 一种商用车重型柴油机分体式摇臂制动机构 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367312A (en) | 1966-01-28 | 1968-02-06 | White Motor Corp | Engine braking system |
| US5647319A (en) | 1995-06-15 | 1997-07-15 | Unisia Jecs Corporation | Decompression braking apparatus for diesel engine |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR52025E (fr) * | 1941-12-10 | 1943-06-30 | Daimler Benz Ag | Prélèvement d'air dans le cylindre de travail d'un moteur à combustion interne, en particulier pour freins à air comprimé et moteurs diesel |
| GB1250612A (de) * | 1968-03-01 | 1971-10-20 | ||
| US3809033A (en) | 1972-07-11 | 1974-05-07 | Jacobs Mfg Co | Rocker arm engine brake system |
| GB2105785B (en) * | 1981-09-10 | 1984-10-03 | Honda Motor Co Ltd | Controlling opening of multiple i c engine intake and exhaust valves |
| JPS5891316A (ja) * | 1981-11-27 | 1983-05-31 | Honda Motor Co Ltd | 頭上弁式動弁機構 |
| JPS59213914A (ja) * | 1983-05-18 | 1984-12-03 | Mazda Motor Corp | エンジンの弁不作動装置 |
| US4572114A (en) | 1984-06-01 | 1986-02-25 | The Jacobs Manufacturing Company | Process and apparatus for compression release engine retarding producing two compression release events per cylinder per engine cycle |
| JPH07109167B2 (ja) * | 1985-09-07 | 1995-11-22 | ヤマハ発動機株式会社 | エンジンの始動デコンプレツサ−装置 |
| US4723516A (en) | 1985-11-25 | 1988-02-09 | Slagley Michael W | Valve open duration and timing controller |
| US4643141A (en) | 1986-01-26 | 1987-02-17 | Bledsoe Phillip G | Internal combustion engine valve lift and cam duration control system |
| IT1255447B (it) | 1991-11-08 | 1995-10-31 | Iveco Fiat | Motore provvisto di un dispositivo di frenatura continua, particolarmente per un veicolo industriale. |
| US5645031A (en) * | 1996-01-18 | 1997-07-08 | Meneely; Vincent Allan | Compression release brake with hydraulically adjustable timing |
| US5611308A (en) * | 1996-02-06 | 1997-03-18 | Caterpillar Inc. | Apparatus for interconnecting an actuator and an exhaust valve opening member |
| US5809964A (en) * | 1997-02-03 | 1998-09-22 | Diesel Engine Retarders, Inc. | Method and apparatus to accomplish exhaust air recirculation during engine braking and/or exhaust gas recirculation during positive power operation of an internal combustion engine |
-
2000
- 2000-03-21 US US09/528,936 patent/US6213091B1/en not_active Expired - Lifetime
- 2000-10-06 CA CA002322988A patent/CA2322988A1/en not_active Abandoned
-
2001
- 2001-03-08 AT AT01105766T patent/ATE297499T1/de not_active IP Right Cessation
- 2001-03-08 DE DE50106426T patent/DE50106426D1/de not_active Expired - Fee Related
- 2001-03-08 EP EP01105766A patent/EP1143121B1/de not_active Expired - Lifetime
- 2001-03-20 ZA ZA200102329A patent/ZA200102329B/xx unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367312A (en) | 1966-01-28 | 1968-02-06 | White Motor Corp | Engine braking system |
| US5647319A (en) | 1995-06-15 | 1997-07-15 | Unisia Jecs Corporation | Decompression braking apparatus for diesel engine |
Non-Patent Citations (1)
| Title |
|---|
| JACOBS VEHICLE SYSTEMS: ""Engine Brake Theory".", FAQS, 1996 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105723055A (zh) * | 2013-11-13 | 2016-06-29 | 戴姆勒股份公司 | 内燃机用发动机制动装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2322988A1 (en) | 2001-09-21 |
| ZA200102329B (en) | 2002-09-20 |
| US6213091B1 (en) | 2001-04-10 |
| ATE297499T1 (de) | 2005-06-15 |
| EP1143121A3 (de) | 2001-10-24 |
| EP1143121B1 (de) | 2005-06-08 |
| DE50106426D1 (de) | 2005-07-14 |
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