WO2011056821A1 - Rocker shaft mounted engine brake - Google Patents

Rocker shaft mounted engine brake Download PDF

Info

Publication number
WO2011056821A1
WO2011056821A1 PCT/US2010/055214 US2010055214W WO2011056821A1 WO 2011056821 A1 WO2011056821 A1 WO 2011056821A1 US 2010055214 W US2010055214 W US 2010055214W WO 2011056821 A1 WO2011056821 A1 WO 2011056821A1
Authority
WO
WIPO (PCT)
Prior art keywords
lost motion
actuator piston
control valve
motion housing
hydraulic fluid
Prior art date
Application number
PCT/US2010/055214
Other languages
English (en)
French (fr)
Inventor
Zdenek S. Meistrick
Robert S. Perkins
Original Assignee
Jacobs Vehicle Systems, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jacobs Vehicle Systems, Inc. filed Critical Jacobs Vehicle Systems, Inc.
Priority to CN2010800496011A priority Critical patent/CN102597434A/zh
Priority to BR112012010498A priority patent/BR112012010498A2/pt
Priority to KR1020127014299A priority patent/KR20120088816A/ko
Priority to JP2012537959A priority patent/JP2013510266A/ja
Priority to EP10828999A priority patent/EP2496800A1/en
Publication of WO2011056821A1 publication Critical patent/WO2011056821A1/en

Links

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
    • F01L1/02—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
    • F01L13/06—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • 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
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • 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
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/10—Providing exhaust gas recirculation [EGR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/01—Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages

Definitions

  • the present invention relates to a system and method for providing engine braking in an internal combustion engine.
  • main intake and main exhaust valve events are required for positive power operation of an internal combustion engine. Additional auxiliary valve events, while not required, may be desirable. For example, it may be desirable to actuate the intake and/or exhaust valves during positive power or other engine operation modes for compression-release engine braking, bleeder engine braking, exhaust gas recirculation (EGR), or brake gas recirculation (BGR).
  • EGR exhaust gas recirculation
  • BGR brake gas recirculation
  • Brake gas recirculation (BGR) systems may allow a portion of the exhaust gases to flow back into the engine cylinder during engine braking operation.
  • Figure 1 is a pictorial view of an engine brake system having an articulated rocker arm and a rocker shaft mounted housing for master and slave pistons
  • Figure 7 is a cross-sectional side view of the engine brake system of Figures 2 and 3 showing the articulated rocker arm, rocker shaft mounted housing, and cam lobe as arranged in accordance with the first embodiment of the present invention when the engine brake system is turned off.
  • Figure 9 is a cross-sectional side view of the engine brake system of Figures 2 and 3 showing the articulated rocker arm, rocker shaft mounted housing, and cam lobe as arranged in accordance with the first embodiment of the present invention when the engine brake system is turned on and the rocker arm is contacting the cam compression-release bump.
  • Figure 15 is a cross-sectional side view of a rocker shaft mounted housing of Figures 13 and 14 which shows an alternative or additional flange for securing the rocker shaft mounted housing in a fixed position in accordance with an alternative embodiment of the present invention.
  • Figure 16 is a second cross-sectional side view of the rocker shaft mounted housing of Figures 13 and 14 which shows the control valve in hydraulic communication with the rocker shaft and the actuator piston as arranged in accordance with the second embodiment of the present invention.
  • Figure 22 is a cross-sectional view of an alternative actuator piston in accordance with an alternative embodiment of the present invention.
  • the rocker arm 200 may further include a cam roller 220, a lug 230, and a central collar 240.
  • the rocker arm return spring 210 may bias the rocker arm 200 towards the brake housing 300 such that the lug 230 contacts the master piston 340.
  • the brake housing 300 may further include an anti- rotation bolt boss 312, a control valve 320, a master piston 340, a slave piston 350 and rocker shaft collars 360 and 362.
  • a slave piston return spring 352 may bias the slave piston 350 up into a slave piston bore formed in the brake housing 300.
  • the rocker shaft collars 360 and 362 of the brake housing 300 may be mounted on the rocker shaft 400.
  • the brake housing may be secured in a fixed position relative to the rocker shaft 400 by the anti-rotation bolt 310 (not shown).
  • the brake housing 300 may include a master piston 340 slidably disposed in a master piston bore 302 and a slave piston 350 slidably disposed in a slave piston bore 304.
  • a master-slave hydraulic fluid passage 306 may extend between the master piston bore 302 and the slave piston bore 304.
  • the slave piston return spring 352 may bias the slave piston 350 upward and against a slave piston lash adjustment screw 354 which extends into the slave piston bore 304.
  • the rocker shaft 400 may include a first hydraulic passage 410 adapted to provide lower pressure hydraulic fluid to the rocker arm 200 (not shown in Fig. 4) for lubrication purposes.
  • the rocker shaft 400 may also include a second hydraulic passage 420, the purpose of which is explained in connection with Fig. 5.
  • FIG. 6 A front cross-sectional view of the brake housing 300 is shown in Fig. 6.
  • the control valve 320 is shown in a "brake off" position during which the control valve body 322 is biased into its lower most position by the control valve spring 326.
  • hydraulic fluid from the second hydraulic passage 420 in the rocker shaft 400 (shown in Fig. 5) may be supplied to the lower portion of the control valve body 322.
  • the supply of hydraulic fluid may cause the control valve body 322 to move upward until the annular opening provided in the mid- portion of the control valve body registers with the slave bore supply passage 309.
  • the bias of the rocker arm return spring 210 may be sufficient to rotate the rocker arm 200 such that the rocker arm lug 230 pushes the master piston 340 all the way into the master piston bore.
  • the rotation of the rocker arm 200 in this manner may create a lash space 106 between the cam roller 220 and the cam lobe 100.
  • the lash space 106 may be designed to have a magnitude x that is as great or greater than the height of the cam bumps 102 and 104.
  • the cam bumps 102 and 104 may not have any effect on the rocker arm 200 or the master and slave pistons 340 and 350.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)
PCT/US2010/055214 2009-11-03 2010-11-03 Rocker shaft mounted engine brake WO2011056821A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN2010800496011A CN102597434A (zh) 2009-11-03 2010-11-03 安装有摇臂轴的发动机制动器
BR112012010498A BR112012010498A2 (pt) 2009-11-03 2010-11-03 freio de motor instalado em eixo de braço oscilante
KR1020127014299A KR20120088816A (ko) 2009-11-03 2010-11-03 로커 축이 장착된 엔진 브레이크
JP2012537959A JP2013510266A (ja) 2009-11-03 2010-11-03 ロッカシャフトを搭載したエンジンブレーキ
EP10828999A EP2496800A1 (en) 2009-11-03 2010-11-03 Rocker shaft mounted engine brake

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/611,297 US20100108007A1 (en) 2007-03-16 2009-11-03 Rocker shaft mounted engine brake
US12/611,297 2009-11-03

Publications (1)

Publication Number Publication Date
WO2011056821A1 true WO2011056821A1 (en) 2011-05-12

Family

ID=43970302

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/055214 WO2011056821A1 (en) 2009-11-03 2010-11-03 Rocker shaft mounted engine brake

Country Status (7)

Country Link
US (1) US20100108007A1 (zh)
EP (1) EP2496800A1 (zh)
JP (1) JP2013510266A (zh)
KR (1) KR20120088816A (zh)
CN (1) CN102597434A (zh)
BR (1) BR112012010498A2 (zh)
WO (1) WO2011056821A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9109469B2 (en) 2013-06-17 2015-08-18 Hyundai Motor Company Apparatus for actuating valves in vehicles in variable valve control manner

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8528508B2 (en) * 2007-03-16 2013-09-10 Jacobs Vehicle Systems, Inc. Individual rocker shaft and pedestal mounted engine brake
CN103470329A (zh) * 2010-05-27 2013-12-25 上海尤顺汽车部件有限公司 发动机的阀门致动系统及产生发动机辅助阀升曲线的方法
WO2012067610A1 (en) 2010-11-17 2012-05-24 Mack Trucks, Inc. Hinged rocker arm and valve openning arrangement including a hinged rocker arm
CN102817667B (zh) * 2012-09-10 2016-02-03 浙江亿日气动科技有限公司 具有辅助摇臂应用辅助凸轮驱动的框架式气门执行装置
CN102828837B (zh) * 2012-09-10 2015-12-30 浙江亿日气动科技有限公司 一种应用辅助凸轮驱动的框架式气门执行装置
CN102937041A (zh) * 2012-11-23 2013-02-20 中国第一汽车股份有限公司 一种能实现发动机制动功能的摇臂体
CN103266927B (zh) * 2013-05-07 2014-11-26 天津大学 液压式无级可变气门摇臂系统
DE102013215946A1 (de) * 2013-08-12 2015-02-12 Avl List Gmbh Ventilbetätigungseinrichtung zur Veränderung des Ventilhubs
CN107636267B (zh) 2015-05-18 2020-07-28 伊顿(意大利)有限公司 具有用作蓄压器的卸油阀的摇臂
CN109661507B (zh) 2016-06-25 2021-04-16 伊顿智能动力有限公司 气门总成
US10907514B2 (en) * 2016-06-25 2021-02-02 Eaton Intelligent Power Limited Valve train assembly
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
CN111788369B (zh) * 2017-12-04 2022-08-05 伊顿智能动力有限公司 具有偏置构型的引擎制动摇臂
TR201720332A2 (tr) * 2017-12-14 2019-07-22 Ford Otomotiv Sanayi As Bi̇r külbütör mekani̇zmasi
CN110173314B (zh) * 2019-05-15 2023-07-18 浙江大学 一种可实现压缩释放式发动机制动的气门桥及其排气制动方法
CN115151711B (zh) * 2020-02-19 2024-03-01 伊顿智能动力有限公司 摇臂组件、顺应性囊盒、致动器和支撑结构
CN112211690B (zh) * 2020-12-02 2021-03-02 江苏卓联精密机械有限公司 分体摇臂与气门桥组合式发动机气门双活塞液压驱动装置
CN113732661B (zh) * 2021-09-01 2024-06-11 福鼎睿达自动化设备有限公司 一种用于膜片式化油器中摇臂组件的组装设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036810A (en) * 1990-08-07 1991-08-06 Jenara Enterprises Ltd. Engine brake and method
US6394050B1 (en) * 1999-09-15 2002-05-28 Diesel Engine Retarders, Inc. Actuator piston assembly for a rocker arm system
US20080223325A1 (en) * 2007-03-16 2008-09-18 Meistrick Zdenek S Engine brake having an articulated rocker arm and a rocker shaft mounted housing

Family Cites Families (5)

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US7152576B2 (en) * 2002-04-08 2006-12-26 Richard Vanderpoel Compact lost motion system for variable value actuation
SE526636C2 (sv) * 2004-02-23 2005-10-18 Volvo Lastvagnar Ab Avgasventilmekanism för en förbränningsmotor
CN100342123C (zh) * 2005-07-26 2007-10-10 马银良 排气门开启高度可变的发动机缓速器装置
US8528508B2 (en) * 2007-03-16 2013-09-10 Jacobs Vehicle Systems, Inc. Individual rocker shaft and pedestal mounted engine brake
KR100969377B1 (ko) * 2008-04-30 2010-07-09 현대자동차주식회사 연속 가변 밸브 리프트 장치

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036810A (en) * 1990-08-07 1991-08-06 Jenara Enterprises Ltd. Engine brake and method
US6394050B1 (en) * 1999-09-15 2002-05-28 Diesel Engine Retarders, Inc. Actuator piston assembly for a rocker arm system
US20080223325A1 (en) * 2007-03-16 2008-09-18 Meistrick Zdenek S Engine brake having an articulated rocker arm and a rocker shaft mounted housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9109469B2 (en) 2013-06-17 2015-08-18 Hyundai Motor Company Apparatus for actuating valves in vehicles in variable valve control manner

Also Published As

Publication number Publication date
BR112012010498A2 (pt) 2016-03-15
JP2013510266A (ja) 2013-03-21
EP2496800A1 (en) 2012-09-12
KR20120088816A (ko) 2012-08-08
CN102597434A (zh) 2012-07-18
US20100108007A1 (en) 2010-05-06

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