JP5100474B2 - 4サイクルエンジンにおけるロッカシャフト支持構造 - Google Patents
4サイクルエンジンにおけるロッカシャフト支持構造 Download PDFInfo
- Publication number
- JP5100474B2 JP5100474B2 JP2008092717A JP2008092717A JP5100474B2 JP 5100474 B2 JP5100474 B2 JP 5100474B2 JP 2008092717 A JP2008092717 A JP 2008092717A JP 2008092717 A JP2008092717 A JP 2008092717A JP 5100474 B2 JP5100474 B2 JP 5100474B2
- Authority
- JP
- Japan
- Prior art keywords
- rocker shaft
- camshaft
- rocker
- shaft support
- cam
- 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.)
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Classifications
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- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- 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
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- 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
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0535—Single overhead camshafts [SOHC]
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20882—Rocker arms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
41・・・機関弁である排気弁
53・・・排気側動弁カム
54・・・カムシャフト
56・・・ロッカシャフト
57・・・ロッカアーム
64,65・・・カムシャフトホルダ
66,67・・・カムキャップ
76,77・・・ロッカシャフト支持部
78・・・支持孔
80・・・ロッカシャフト中央支持部
82,83・・・第1補強リブ
84・・・第2補強リブ
85,86・・・第3補強リブ
Claims (3)
- カムシャフト(54)に設けられる動弁カム(53)および機関弁(41)間に介設されるロッカアーム(57)が、前記カムシャフト(54)と平行な軸線を有するロッカシャフト(56)に揺動可能に支承され、前記ロッカアーム(57)を相互間に配置するようにして前記ロッカシャフト(56)の両端部を揺動可能に支持する一対のロッカシャフト支持部(76,77)が、前記カムシャフト(54)及び前記ロッカシャフト(56)の軸線方向から見て前記機関弁(41)および前記カムシャフト(54)間に配置されるようにしてシリンダヘッド(19)に一体に設けられる4サイクルエンジンにおいて、
前記ロッカシャフト支持部(76,77)の前記カムシャフト(54)とは反対側の側面に、前記ロッカシャフト(56)の軸線に直交する平面に配置される第1補強リブ(82,83)が一体に突設され、
少なくとも一方の前記ロッカシャフト支持部(76)の、前記ロッカアーム(57)とは反対側の側面には、前記ロッカシャフト(56)の軸線と平行な平面に配置される第2補強リブ(84)が一体に突設され、
前記第2補強リブ(84)は、前記少なくとも一方のロッカシャフト支持部(76)に形成されて前記ロッカシャフト(56)を嵌合、支持するための支持孔(78)の開口縁に該第2補強リブ(84)の側縁が接するように、且つその支持孔(78)の中心と該第2補強リブ(84)の上端が同じ高さとなるように形成されることを特徴とする、4サイクルエンジンにおけるロッカシャフト支持構造。 - 前記ロッカシャフト支持部(76,77)に一体に連なるカムシャフトホルダ(64,65)が前記シリンダヘッド(19)に一体に設けられ、前記カムシャフトホルダ(64,65)と協働して前記カムシャフト(54)を回転自在に支承するカムキャップ(66,67)が前記カムシャフトホルダ(64,65)に締結され、前記カムキャップ(66,67)の前記カムシャフトホルダ(64,65)への締結部から前記カムシャフト(54)の軸線に沿う方向に突出して前記ロッカシャフト支持部(76,77)に当接する第3補強リブ(85,86)が前記カムキャップ(66,67)に一体に突設されることを特徴とする請求項1記載の4サイクルエンジンにおけるロッカシャフト支持構造。
- 前記ロッカシャフト(56)の軸方向中央部を支持するロッカシャフト中央支持部(80)が、前記両ロッカシャフト支持部(76,77)間で前記シリンダヘッド(19)に一体に設けられることを特徴とする請求項1または2記載の4サイクルエンジンにおけるロッカシャフト支持構造。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008092717A JP5100474B2 (ja) | 2008-03-31 | 2008-03-31 | 4サイクルエンジンにおけるロッカシャフト支持構造 |
US12/394,981 US8251031B2 (en) | 2008-03-31 | 2009-02-27 | Rocker shaft support structure in four-cycle engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008092717A JP5100474B2 (ja) | 2008-03-31 | 2008-03-31 | 4サイクルエンジンにおけるロッカシャフト支持構造 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009243402A JP2009243402A (ja) | 2009-10-22 |
JP5100474B2 true JP5100474B2 (ja) | 2012-12-19 |
Family
ID=41115230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008092717A Active JP5100474B2 (ja) | 2008-03-31 | 2008-03-31 | 4サイクルエンジンにおけるロッカシャフト支持構造 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8251031B2 (ja) |
JP (1) | JP5100474B2 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8857417B2 (en) * | 2009-12-30 | 2014-10-14 | Kawasaki Jukogyo Kabushiki Kaisha | Engine for vehicle |
DE102010019129A1 (de) * | 2010-04-30 | 2011-11-03 | Mahle International Gmbh | Lagerbock einer Nockenwelle |
JP5586087B2 (ja) * | 2010-05-10 | 2014-09-10 | 本田技研工業株式会社 | 内燃機関の可変動弁機構 |
US9816405B2 (en) | 2015-09-29 | 2017-11-14 | Caterpillar Inc. | Rocker base for valve actuation system |
US10006317B2 (en) | 2015-09-29 | 2018-06-26 | Caterpillar Inc. | Valve actuation system |
US9915355B2 (en) | 2015-10-06 | 2018-03-13 | Caterpillar Inc. | Valve having open-center spool with separated inserts |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0352966Y2 (ja) * | 1985-09-04 | 1991-11-19 | ||
JPH0240241Y2 (ja) * | 1985-09-25 | 1990-10-26 | ||
JPH0232845Y2 (ja) * | 1985-10-16 | 1990-09-05 | ||
JPH07305652A (ja) * | 1994-05-10 | 1995-11-21 | Yamaha Motor Co Ltd | 内燃機関用シリンダヘッド |
JP3535432B2 (ja) * | 1999-12-28 | 2004-06-07 | 本田技研工業株式会社 | 内燃機関の動弁装置 |
JP3652598B2 (ja) * | 2000-11-22 | 2005-05-25 | 本田技研工業株式会社 | 内燃機関 |
JP2004100651A (ja) * | 2002-09-12 | 2004-04-02 | Honda Motor Co Ltd | 4サイクル式エンジン |
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2008
- 2008-03-31 JP JP2008092717A patent/JP5100474B2/ja active Active
-
2009
- 2009-02-27 US US12/394,981 patent/US8251031B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20090241880A1 (en) | 2009-10-01 |
JP2009243402A (ja) | 2009-10-22 |
US8251031B2 (en) | 2012-08-28 |
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