EP1143121B1 - Motorbremseinrichtung mit verschiebbarer Kipphebelschwenkachse - Google Patents
Motorbremseinrichtung mit verschiebbarer Kipphebelschwenkachse Download PDFInfo
- Publication number
- EP1143121B1 EP1143121B1 EP01105766A EP01105766A EP1143121B1 EP 1143121 B1 EP1143121 B1 EP 1143121B1 EP 01105766 A EP01105766 A EP 01105766A EP 01105766 A EP01105766 A EP 01105766A EP 1143121 B1 EP1143121 B1 EP 1143121B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- piston
- shaft
- engine braking
- rocker
- 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.)
- Expired - Lifetime
Links
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 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
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003993 interaction 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 pivotally mounted on a shaft tilting lever, one in a piston chamber arranged piston whose position of a controlled by a pressure control device and on pressure applied to it, with a movement of the Piston a displacement of the pivot axis of the rocker arm causes.
- engine braking devices are known.
- a freewheeling element provided in one end of a rocker arm or in connections, which connect the rocker arm to a cam or a valve, to allow a control mechanism on an area to respond to the cam profile or ignore it.
- a another type of engine braking device is disclosed in US-A-5,647,319 and shown in US-A-3,367,312. Both engine braking devices have a brake mechanism in which a Pivoting center of an outlet rocker arm through an eccentric is shifted or shifted, which with a Hydraulic piston / actuator is connected via a lever arm.
- an engine braking device is available that is simple in construction, since it is only a small one Number of components. Most of these components do not have increased requirements regarding the Fulfill manufacturing tolerances and are also no increased Loads, in particular in the nature of bending stresses exposed. Such a system has a reduced Complexity and is therefore cost effective and error-insensitive. Due to the lower number of components and a waiver of additional levers or compounds is the Overall height of a drive with an inventive Motor brake device not or only slightly increased.
- the piston directly on the rocker arm or on an at least substantially flat surface / surface of the Kipphebels acts or in a designated there, suitably formed recess engages the rocker arm. It is particularly easy to assemble when it is on the rocker arm a projection is provided on which an end portion of the piston can attack. That way, beyond that ensures that a permanent interaction of the piston and the rocker arm is ensured.
- the projection has a convex Surface on, which with a trained accordingly Surface of the piston, which is preferably concave is, cooperates.
- the displacement of the rocker arm or its pivot axis can be achieved by a hole in the rocker arm a larger diameter than the shaft on the he is arranged.
- the possibility of relocation is thereby limited, that the rocker arm or its bore at least in essential opposite sides of the shaft in Depending on the position of the piston come to rest can.
- the side of the shaft at which the rocker arm is applied when the piston is loaded by pressure is around the top of the shaft and accordingly around the shaft Bottom, when the piston is not loaded, as this is the Direction of the bias of the operated by the rocker arm Valves or valve stem assemblies corresponds.
- an engine braking device is used (compression braking system) 10, which shows a Exhaust valve rocker arm 12 pivotally via a rocker arm shaft or shaft 14 supported by a rocker shaft hole or a bore 15 is received.
- the shaft 14 has a Diameter up, which by a small amount, like 7.62 mm (0.030 inches), for example, is smaller than that Bore 15.
- One end of the rocker arm 12 carries a roller 16, which on a camshaft 18 with an integrally formed Freewheel cam 20 attacks.
- the other end of the rocker arm 12th engages an outlet valve stem assembly 22.
- the rocker arm 12 normally in abutment with a bottom held the shaft 14, 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 a partially cylindrical convex outer surface 26 on.
- One Piston 28 engages the projection 24 and has a cylindrical concave surface 29 on which with the convex Surface 26 of the projection 24 is engaged.
- the piston 28 is displaceable in a piston bore 30th received, which is provided in a housing 32, which preferably part of a cylinder block of a diesel engine (not shown).
- the piston 28 and a wall of Piston bore 30 enclose a pressure chamber 34.
- the pressure in the pressure chamber 34 is preferably through a Pressure control unit 36 controlled, which preferably also is arranged in the housing 32, as it is "FAQs: Engine Brake Theory ", by Jacobs Vehicle Systems, 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 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 while a moved central area of the rocker arm 12 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 moved.
- this engine brake device 10 uses electronically controlled hydraulic elements to the Pivoting position of the rocker arm 12 to the drive delay or To control braking.
- a control of the pivot position of Rocker arm 12 allows a part or the / the whole Exhaust cam profile / movement of the camshaft 18 to the valve stem assembly 22 to be transferred.
- the selected Transmission of part or all of the exhaust cam movement to the valves determined in conjunction with the fuel supply level drive the ability of the drive positive Generating power or absorbing (braking) power.
- An extension of the piston 28 moves the Kipphebelschwenkddling transversely to its axis, so that the rocker arm 12 selectively respond 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, applies, so that the Pivot point of the rocker arm 12 is controlled.
- a small 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 12th to react to the freewheel cam 20 and forces on the Valve stem assembly 22 to transmit, as the freewheel cam 20 is small enough to "lose” in the valve play.
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)
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 (29) 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 EP1143121A2 (de) | 2001-10-10 |
| EP1143121A3 EP1143121A3 (de) | 2001-10-24 |
| EP1143121B1 true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2162600B1 (de) * | 2007-06-01 | 2013-09-04 | Jacobs Vehicle Systems, Inc. | Variables ventilsteuersystem |
| EP2640934B1 (de) | 2010-11-15 | 2019-01-09 | Achates Power, Inc. | Zweitakt-gegenlaufverbrennungsmotor mit entspannung der kompression zur motorbremsung |
| WO2013058802A1 (en) | 2011-02-23 | 2013-04-25 | Achates Power Inc. | Two stroke, opposed-piston engines with engine braking |
| DE102013019000A1 (de) * | 2013-11-13 | 2015-05-13 | Daimler Ag | Motorbremsvorrichtung für eine Brennkraftmaschine |
| 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 |
Family Cites Families (16)
| 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 |
| US3367312A (en) | 1966-01-28 | 1968-02-06 | White Motor Corp | Engine braking system |
| 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. |
| JPH08338215A (ja) | 1995-06-15 | 1996-12-24 | Unisia Jecs Corp | デコンプレッションブレーキ装置 |
| 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
Also Published As
| Publication number | Publication date |
|---|---|
| EP1143121A3 (de) | 2001-10-24 |
| CA2322988A1 (en) | 2001-09-21 |
| US6213091B1 (en) | 2001-04-10 |
| ATE297499T1 (de) | 2005-06-15 |
| EP1143121A2 (de) | 2001-10-10 |
| DE50106426D1 (de) | 2005-07-14 |
| ZA200102329B (en) | 2002-09-20 |
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