+

US20070221154A1 - Anti-tipping roller follower - Google Patents

Anti-tipping roller follower Download PDF

Info

Publication number
US20070221154A1
US20070221154A1 US11/277,468 US27746806A US2007221154A1 US 20070221154 A1 US20070221154 A1 US 20070221154A1 US 27746806 A US27746806 A US 27746806A US 2007221154 A1 US2007221154 A1 US 2007221154A1
Authority
US
United States
Prior art keywords
roller follower
lash adjuster
valve
tipping
legs
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.)
Abandoned
Application number
US11/277,468
Inventor
Scott Smith
Blaine Lingenfelter
John Brune
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GENTEK TECHNOLOGIES MARKETING Inc
GenTek Tech Marketing Inc
Original Assignee
GenTek Tech Marketing 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 GenTek Tech Marketing Inc filed Critical GenTek Tech Marketing Inc
Priority to US11/277,468 priority Critical patent/US20070221154A1/en
Assigned to GENTEK TECHNOLOGIES MARKETING INC. reassignment GENTEK TECHNOLOGIES MARKETING INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRUNE, JOHN E., LINGENFELTER, BLAINE R., SMITH, SCOTT P.
Publication of US20070221154A1 publication Critical patent/US20070221154A1/en
Abandoned legal-status Critical Current

Links

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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-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
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/01—Absolute values

Definitions

  • This invention relates to a roller follower for a Type II internal combustion engine and more particularly to a roller follower devised with an anti-tipping feature placed at the socket end of the rocker arm.
  • a key factor for roller follower design is mass at the valve end. Reducing the amount of moving mass can improve engine performance by using more aggressive valve lift profiles, which in turn can improve engine power, raise limiting speed, and reduce hydrocarbon emissions. It is common knowledge a Type II valve train roller follower is configured to include a socket end to engage a lash adjuster, a valve pad end to engage a valve, and a bearing between the ends that contacts an over head cam. When the roller follower is placed in the head on the lash adjuster and valve, before the cam shaft is installed, there is a degree of freedom for the roller follower to tip side to side. The roller follower needs that side to side freedom for any misalignment that may have occurred when the bearing was installed into the roller follower.
  • rocker arm valve guide walls Another important function of the rocker arm valve guide walls is to prevent the roller follower from tipping over and falling into the engine head during the automated engine assembly process. Once the cam shaft is put into place during the assembly process the roller follower will be securely held on the lash adjuster and valve tip. To keep the roller follower from tipping the rocker arm valve guide walls need to be greater than about 3 mm in height. This provides enough valve stem to guide wall contact to limit how much the roller follower can tip and not fall off. By adding wall height to control tipping you also add additional moving mass which is undesirable for engine performance.
  • roller follower that combines using guide walls less then 3 mm to reduce valve pad end mass and still provide enough stability to not tip during engine assembly.
  • the anti-tipping arrangement of the invention comprises providing legs of a suitable height at the socket end of a Type II roller follower.
  • This anti-tipping feature of the invention is advantageously devised with legs that extend down around the lash adjuster plunger to provide stability for the roller follower.
  • the stability providing feature of the invention has no significant impact on, i.e., is not a detriment to, the mass at the valve end. Additional advantages of the invention will be apparent from the detailed description and drawings.
  • FIG. 1 is a diagrammatic representation of a valve train including an overhead camshaft with cam lobes, lash adjuster, valve and roller follower.
  • FIG. 2 is a perspective disassembled bottom view of the clip and roller follower with roller.
  • FIG. 3 is a perspective more detailed bottom view of the roller follower per se, i.e., with roller omitted.
  • FIG. 4 is a perspective view of the assembled roller follower with clip in place.
  • FIG. 5 is another perspective view of the assembled roller follower with clip in place.
  • FIG. 6 is a fragmentary cross-sectional view through the top of the lash adjuster with the roller follower of the invention in place.
  • FIG. 7 is a perspective view of the pivot clip of the invention provided with an outer socket clearance hole, a plunger body clearance hole and flat clip legs.
  • FIG. 8 is a fragmentary perspective view of the roller follower with the clip device of FIG. 7 in place.
  • FIG. 9 is a fragmentary perspective view of the roller follower with an alternative anti-tipping device comprising a wire clip in position on the roller follower.
  • FIG. 1 refers to a Type II Valve Train design which includes overhead camshaft 16 provided with cam 10 having a cam lobe 11 , lash adjuster 12 , valve 13 and roller follower 14 .
  • the roller follower 14 is in contact with the camshaft cam lobe 11 .
  • the roller follower 14 pivots, i.e., reciprocates on the lash adjuster 12 .
  • the lash adjuster is devised to maintain zero clearance between the cam, rocker arm and valve throughout the lift event so that there is no separation between the valve contact portion 22 of the rocker arm and valve 13 causing what is known as valve loss motion resulting in poor engine performance.
  • the roller follower 14 translates the rotating camshaft motion into linear motion which opens and closes the valve 13 .
  • the roller follower 14 comprises a main body 18 with side walls 20 generally comprising U-shape cross-section, pivot socket 19 which engages the lash adjuster 12 and valve contacting portion 22 .
  • An opening 21 is provided in the side walls 20 to mount a shaft 26 which passes through the roller follower body and is preferably surrounded by t multiple needle bearings 27 (shown in FIG. 1 ) and roller 17 .
  • Roller 17 is positioned between side walls 20 and pivot socket 19 and valve contacting portion, valve pad 22 .
  • the valve contact portion is provided with guide extensions 23 that are parallel to side walls 20 .
  • roller follower 14 is illustrated in accompaniment but not engaged with the anti-tipping clip 15 .
  • FIGS. 4 and 5 the anti-tipping clip 15 shown separate in FIG. 2 and FIG. 7 is engaged on the assembled roller follower 14 .
  • FIG. 6 illustrates a cross-section at the top of the lash adjuster 12 which engages the pivot socket 19 of the roller follower.
  • FIG. 7 the pivot clip 15 which contains socket clearance hole 24 , plunger body clearance hole 26 and clip leg 25 is shown.
  • FIG. 9 illustrates an alternated clip 30 with wire form legs 31 and 32 , secured to the roller follower body 18 a.
  • Reference numbers followed by the lower case “a” in FIG. 9 identify elements that function similar to the earlier mentioned elements bearing similar numbers.
  • rocker arm valve guide walls 23 or an additional part is added to the roller follower contiguous to the valve pad 22 end.
  • Another important function of the rocker arm valve guide walls is to prevent the roller follower from tipping over and falling into the engine head during automated engine assembly process, e.g., in order to keep the roller follower from tipping the rocker arm valve guide walls need to be greater than about 3 mm in height. This provides reasonable assurance that enough valve stem to guide wall contact is provided so that any occurring tipping of the roller follower will not result in a displacement of the roller follower. It is to be noted that adding wall height to control tipping also results in additional moving mass which is undesirable for engine performance.
  • a roller follower uses minimum necessary guide walls of the order of less than 3 mm to reduce valve pad end mass and still provide enough stability to prevent tipping during engine assembly.
  • the anti-tipping feature of the invention is advantageously devised with legs that extend down around the lash adjuster plunger to provide stability for the roller follower.
  • the stability providing anti-tipping adjunct of the invention does not introduce a significant impact on, i.e., is not a detriment to, the mass at the valve end of the roller follower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

An anti-tipping feature for a roller follower is provided that is positioned at the socket end of a Type II roller follower. The anti-tipping feature is designed to fit around the plunger of a lash adjuster. The feature has legs that extend down around the plunger to provide stability for the roller follower. Tipping of the roller follower is controlled by the formed legs that extend down the plunger. The length of the legs and clearance determine the amount of roller follower tipping. The valve guide wall height can be shortened enough to still provide valve containment and reduce moving mass which comprises a key component to engine performance.

Description

  • This invention relates to a roller follower for a Type II internal combustion engine and more particularly to a roller follower devised with an anti-tipping feature placed at the socket end of the rocker arm.
    • BACKGROUND OF THE INVENTION
  • A key factor for roller follower design is mass at the valve end. Reducing the amount of moving mass can improve engine performance by using more aggressive valve lift profiles, which in turn can improve engine power, raise limiting speed, and reduce hydrocarbon emissions. It is common knowledge a Type II valve train roller follower is configured to include a socket end to engage a lash adjuster, a valve pad end to engage a valve, and a bearing between the ends that contacts an over head cam. When the roller follower is placed in the head on the lash adjuster and valve, before the cam shaft is installed, there is a degree of freedom for the roller follower to tip side to side. The roller follower needs that side to side freedom for any misalignment that may have occurred when the bearing was installed into the roller follower. This misalignment allows the roller follower to still be functional and perform as designed. During engine operation if the bearing is not exactly parallel to the valve pad the roller follower, without any valve containment feature, can slide off the valve stem causing the cylinder to misfire and reducing engine performance. To keep the roller follower from sliding off the valve integral formed guide walls or an additional part is added to the roller follower at the valve pad end.
  • Another important function of the rocker arm valve guide walls is to prevent the roller follower from tipping over and falling into the engine head during the automated engine assembly process. Once the cam shaft is put into place during the assembly process the roller follower will be securely held on the lash adjuster and valve tip. To keep the roller follower from tipping the rocker arm valve guide walls need to be greater than about 3 mm in height. This provides enough valve stem to guide wall contact to limit how much the roller follower can tip and not fall off. By adding wall height to control tipping you also add additional moving mass which is undesirable for engine performance.
  • Consequently, there exists a need for a roller follower that combines using guide walls less then 3 mm to reduce valve pad end mass and still provide enough stability to not tip during engine assembly.
    • SUMMARY OF THE INVENTION
  • The anti-tipping arrangement of the invention comprises providing legs of a suitable height at the socket end of a Type II roller follower. This anti-tipping feature of the invention is advantageously devised with legs that extend down around the lash adjuster plunger to provide stability for the roller follower.
  • The stability providing feature of the invention has no significant impact on, i.e., is not a detriment to, the mass at the valve end. Additional advantages of the invention will be apparent from the detailed description and drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a diagrammatic representation of a valve train including an overhead camshaft with cam lobes, lash adjuster, valve and roller follower.
  • FIG. 2 is a perspective disassembled bottom view of the clip and roller follower with roller.
  • FIG. 3 is a perspective more detailed bottom view of the roller follower per se, i.e., with roller omitted.
  • FIG. 4 is a perspective view of the assembled roller follower with clip in place.
  • FIG. 5 is another perspective view of the assembled roller follower with clip in place.
  • FIG. 6 is a fragmentary cross-sectional view through the top of the lash adjuster with the roller follower of the invention in place.
  • FIG. 7 is a perspective view of the pivot clip of the invention provided with an outer socket clearance hole, a plunger body clearance hole and flat clip legs.
  • FIG. 8 is a fragmentary perspective view of the roller follower with the clip device of FIG. 7 in place.
  • FIG. 9 is a fragmentary perspective view of the roller follower with an alternative anti-tipping device comprising a wire clip in position on the roller follower.
    • DETAILED DESCRIPTION OF THE INVENTION
  • Referring to the figures of the drawings, FIG. 1 refers to a Type II Valve Train design which includes overhead camshaft 16 provided with cam 10 having a cam lobe 11, lash adjuster 12, valve 13 and roller follower 14. The roller follower 14 is in contact with the camshaft cam lobe 11. As the lobe camshaft 16 and cam 11 rotate the cam lobe 11 displaces the roller follower 14. The roller follower 14 pivots, i.e., reciprocates on the lash adjuster 12. The lash adjuster is devised to maintain zero clearance between the cam, rocker arm and valve throughout the lift event so that there is no separation between the valve contact portion 22 of the rocker arm and valve 13 causing what is known as valve loss motion resulting in poor engine performance. The roller follower 14 translates the rotating camshaft motion into linear motion which opens and closes the valve 13.
  • As shown in FIG. 2 and FIG. 3, elements of the roller follower are illustrated. The roller follower 14 comprises a main body 18 with side walls 20 generally comprising U-shape cross-section, pivot socket 19 which engages the lash adjuster 12 and valve contacting portion 22. An opening 21 is provided in the side walls 20 to mount a shaft 26 which passes through the roller follower body and is preferably surrounded by t multiple needle bearings 27 (shown in FIG. 1) and roller 17. Roller 17 is positioned between side walls 20 and pivot socket 19 and valve contacting portion, valve pad 22. The valve contact portion is provided with guide extensions 23 that are parallel to side walls 20. As shown in FIG. 2, roller follower 14 is illustrated in accompaniment but not engaged with the anti-tipping clip 15.
  • In FIGS. 4 and 5 the anti-tipping clip 15 shown separate in FIG. 2 and FIG. 7 is engaged on the assembled roller follower 14.
  • FIG. 6 illustrates a cross-section at the top of the lash adjuster 12 which engages the pivot socket 19 of the roller follower.
  • In FIG. 7 the pivot clip 15 which contains socket clearance hole 24, plunger body clearance hole 26 and clip leg 25 is shown.
  • In the enlarged fragmentary view of FIG. 8, the clip 15 in position is illustrated in greater detail.
  • FIG. 9 illustrates an alternated clip 30 with wire form legs 31 and 32, secured to the roller follower body 18a. Reference numbers followed by the lower case “a” in FIG. 9 identify elements that function similar to the earlier mentioned elements bearing similar numbers.
  • To keep the roller follower 14 from sliding off the valve 13 integral formed guide walls 23 or an additional part is added to the roller follower contiguous to the valve pad 22 end. Another important function of the rocker arm valve guide walls is to prevent the roller follower from tipping over and falling into the engine head during automated engine assembly process, e.g., in order to keep the roller follower from tipping the rocker arm valve guide walls need to be greater than about 3 mm in height. This provides reasonable assurance that enough valve stem to guide wall contact is provided so that any occurring tipping of the roller follower will not result in a displacement of the roller follower. It is to be noted that adding wall height to control tipping also results in additional moving mass which is undesirable for engine performance. It is thus seen that a roller follower is provided that uses minimum necessary guide walls of the order of less than 3 mm to reduce valve pad end mass and still provide enough stability to prevent tipping during engine assembly. The anti-tipping feature of the invention is advantageously devised with legs that extend down around the lash adjuster plunger to provide stability for the roller follower. The stability providing anti-tipping adjunct of the invention does not introduce a significant impact on, i.e., is not a detriment to, the mass at the valve end of the roller follower.
  • Although the invention has been described in terms of a specific embodiment, one skilled in the art can vary or substitute other obvious elements or embodiments and these are meant to be included herein. The invention is only to be limited by the scope of the appended claims.

Claims (3)

1. In a roller follower that pivots about a lash adjuster of internal combustion engines comprising a one-piece, cold-formed, elongate metal body having a generally U-shaped cross-section and having an intermediate portion, a first valve contact end portion, and a second lash adjuster contact end portion, said intermediate portion having two substantially parallel side walls and a large elongate upper opening, said first end portion having a top wall and two side walls extending downwardly therefrom generally inverted U-shaped recess to receive an end of a valve stem, said second end lash adjuster contact portion having a second top wall and side walls extending downwardly there from, the improvement comprises an anti-tipping clip secured to the lash adjuster end and having a pair of legs extended around the lash adjuster contact so as to afford stability for the assembly.
2. The roller follower of claim 1 wherein legs of the lash adjuster clip comprises a flat configuration.
3. The roller follower of claim 1 wherein the lash adjuster clip comprises a wire leg configuration.
US11/277,468 2006-03-24 2006-03-24 Anti-tipping roller follower Abandoned US20070221154A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/277,468 US20070221154A1 (en) 2006-03-24 2006-03-24 Anti-tipping roller follower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/277,468 US20070221154A1 (en) 2006-03-24 2006-03-24 Anti-tipping roller follower

Publications (1)

Publication Number Publication Date
US20070221154A1 true US20070221154A1 (en) 2007-09-27

Family

ID=38532017

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/277,468 Abandoned US20070221154A1 (en) 2006-03-24 2006-03-24 Anti-tipping roller follower

Country Status (1)

Country Link
US (1) US20070221154A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009154621A1 (en) * 2008-06-18 2009-12-23 The Timken Company Coupling device
US20110214527A1 (en) * 2004-02-06 2011-09-08 Guenthner Manfred Joining device for an actuating lever and supporting element of a valve operating mechanism of an internal combustion engine
US20150308300A1 (en) * 2014-04-28 2015-10-29 Schaeffler Technologies AG & Co. KG Rocker arm clip retention feature
CN110284936A (en) * 2013-02-22 2019-09-27 伊顿智能动力有限公司 Customization VVA rocker arm for left and right side orientation
DE102008052281B4 (en) * 2008-10-18 2020-01-16 Schaeffler Technologies AG & Co. KG Lever-like cam follower for actuating a gas exchange valve of an internal combustion engine
US11530630B2 (en) 2010-03-19 2022-12-20 Eaton Intelligent Power Limited Systems, methods, and devices for rocker arm position sensing
US11788439B2 (en) 2010-03-19 2023-10-17 Eaton Intelligent Power Limited Development of a switching roller finger follower for cylinder deactivation in internal combustion engines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6047675A (en) * 1998-11-10 2000-04-11 General Motors Corporation Retainer clip and valve actuator subassembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6047675A (en) * 1998-11-10 2000-04-11 General Motors Corporation Retainer clip and valve actuator subassembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110214527A1 (en) * 2004-02-06 2011-09-08 Guenthner Manfred Joining device for an actuating lever and supporting element of a valve operating mechanism of an internal combustion engine
US8434441B2 (en) * 2004-02-06 2013-05-07 Manfred Günthner Joining device for an actuating lever and supporting element of a valve operating mechanism of an internal combustion engine
WO2009154621A1 (en) * 2008-06-18 2009-12-23 The Timken Company Coupling device
US20110011361A1 (en) * 2008-06-18 2011-01-20 Koyo Bearings Usa Llc Coupling device
DE102008052281B4 (en) * 2008-10-18 2020-01-16 Schaeffler Technologies AG & Co. KG Lever-like cam follower for actuating a gas exchange valve of an internal combustion engine
US11530630B2 (en) 2010-03-19 2022-12-20 Eaton Intelligent Power Limited Systems, methods, and devices for rocker arm position sensing
US11788439B2 (en) 2010-03-19 2023-10-17 Eaton Intelligent Power Limited Development of a switching roller finger follower for cylinder deactivation in internal combustion engines
CN110284936A (en) * 2013-02-22 2019-09-27 伊顿智能动力有限公司 Customization VVA rocker arm for left and right side orientation
US20150308300A1 (en) * 2014-04-28 2015-10-29 Schaeffler Technologies AG & Co. KG Rocker arm clip retention feature
US9512744B2 (en) * 2014-04-28 2016-12-06 Schaeffler Technologies AG & Co. KG Rocker arm clip retention feature

Similar Documents

Publication Publication Date Title
US20070221154A1 (en) Anti-tipping roller follower
US4697473A (en) Rocker arm with cam-contacting roller
US6321705B1 (en) Roller finger follower for valve deactivation
US5016582A (en) Rocker arm
US5259346A (en) Rocker arm of the cam-follower type for operating two valves
US7878166B2 (en) Device and method for retaining a valve bridge
US20100313838A1 (en) Cam carrier assembly
CA2037870C (en) Rocker arm with rounded channel to engage a valve stem with semi-spherical end
US20070204826A1 (en) Engine and valvetrain with compact rocker arm and fulcrum assembly for internal combustion engines
US20180094553A1 (en) Valve bridge for valve systems
US5799546A (en) Compact roller follower
US4724803A (en) Rolling contact rocker arm with reaction member, rocker key and roller follower
CN111655978B (en) Mechanical retention member for a valve train component
US8813706B2 (en) Internal combustion engine having valve lifter assembly with misalignment limiting key pin
US20060231059A1 (en) Internal combustion engine
US20090078224A1 (en) Cam follower rocker arm
EP0570963A1 (en) A valve control system for a variable-timing internal combustion engine, particularly for an engine with several valves per cylinder
MY141693A (en) Internal combustion engine
JP6327018B2 (en) Engine valve structure
EP1279797B1 (en) A rocker arm mechanism for actuating valves in internal combustion engines
KR101241558B1 (en) Roller tappet of direct acting type of variable valve lift device for vehicle
JP4566071B2 (en) Internal combustion engine
EP1270882A3 (en) Four-stroke internal combustion engine with valve resting mechanism
KR101518950B1 (en) Cam shaft unit for vehicle
KR0131535Y1 (en) Rocker arm spring

Legal Events

Date Code Title Description
AS Assignment

Owner name: GENTEK TECHNOLOGIES MARKETING INC., NEW JERSEY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SMITH, SCOTT P.;LINGENFELTER, BLAINE R.;BRUNE, JOHN E.;REEL/FRAME:018248/0830

Effective date: 20060327

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载