US20040200447A1 - Supporting structure for engine timing chain - Google Patents

Supporting structure for engine timing chain Download PDF

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Publication number
US20040200447A1
US20040200447A1 US10/738,291 US73829103A US2004200447A1 US 20040200447 A1 US20040200447 A1 US 20040200447A1 US 73829103 A US73829103 A US 73829103A US 2004200447 A1 US2004200447 A1 US 2004200447A1
Authority
US
United States
Prior art keywords
timing chain
chain
assembly
camshaft
chain guide
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
US10/738,291
Other languages
English (en)
Inventor
Gyu-Wan Kim
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.)
Hyundai Motor Co
Original Assignee
Hyundai Motor Co
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 Hyundai Motor Co filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIM, GYU-WAN
Publication of US20040200447A1 publication Critical patent/US20040200447A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • 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
    • F01L1/022—Chain drive
    • 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
    • F01L2001/0537—Double overhead camshafts [DOHC]

Definitions

  • the present invention relates to a supporting structure for an engine timing chain and, more particularly, to a chain guide for guiding movement of a timing chain.
  • the interaction between a crankshaft and a camshaft that allows an intake and exhaust valve of an engine to open and close periodically causes the driving force to vary periodically because the driving force transmitted from the crankshaft to the camshaft is maximized when a cam lobe of the camshaft pushes against the intake or exhaust valve.
  • a driving torque is periodically varied during a periodic opening and closing of intake and exhaust valves. The periodic variation of the driving torque forces the timing chain to move vertically (approximately 3-4 mm) in close proximity to the camshaft sprocket.
  • Embodiments of the present invention provide an engine having a timing chain adapted to artificially restrict vertical movement of a timing chain in close proximity to a camshaft sprocket, thereby reducing any abnormal engagement between the camshaft sprocket and timing chain, decreasing noise, and increasing the life of components.
  • a supporting structure for an engine timing chain comprises a timing chain installed around a crankshaft sprocket and a camshaft sprocket to allow the camshaft to interact with the crankshaft for periodically opening and closing an intake and an exhaust valve.
  • a chain guide guides movements of the timing chain in close proximity to the camshaft sprocket, such that the timing chain is restricted in vertical movement.
  • the chain guide preferably further comprises a body part having a guide groove at its rear portion for allowing the timing chain to be inserted therein.
  • a mounting boss part is integrally formed at a lower portion of the body part for fixing the chain guide.
  • the chain guide is further preferably secured at a cam cap mounted on a journal part of the cylinder head, wherein the cam cap is integrally formed for simultaneously fixing the intake and exhaust camshafts at the journal part of the cylinder head.
  • FIG. 1 is a schematic drawing of a chain guide mounted on an engine timing chain according to an embodiment of the present invention
  • FIGS. 2 ( a ) and ( b ) respectively illustrate front and rear perspective views of the chain guide of FIG. 1;
  • FIG. 3 is a perspective view illustrating a configuration and installation state of a cam cap for mounting a chain guide thereto according to the embodiment of the present invention.
  • FIGS. 4 and 5 respectively illustrate front and rear perspective views of the cam cap of FIG. 3.
  • a timing chain 14 is installed around a crankshaft sprocket 10 and a camshaft sprocket 12 .
  • a chain guide 16 is mounted adjacent to the camshaft sprocket 12 to restrict any vertical movement of the timing chain 14 .
  • the chain guide 16 is preferably installed between an intake camshaft sprocket 12 a and an exhaust camshaft sprocket 12 b.
  • the chain guide 16 is formed with a mounting boss part 16 a at its lower portion for fixing the chain guide 16 to an engine cylinder head or the like.
  • a body part 16 b having a guide groove 16 c for fixing and supporting the timing chain 14 is formed at an upper portion of the mounting boss part 16 a.
  • the chain guide 16 may be preferably installed at a cam cap 24 as shown in FIG. 3.
  • the cam cap 24 is designed to fix an intake and an exhaust camshaft 20 and 22 at a journal part 18 a of a cylinder head 18 .
  • the cam cap 24 is, therefore, installed on the journal part 18 a of the cylinder head 18 in close proximity to the camshaft sprocket 12 .
  • a detailed configuration of the integral cam cap 24 is illustrated in FIGS. 4 and 5, respectively.
  • the cam cap 24 is formed with receptive grooves 24 a at both ends of the journal part so as to support the intake and exhaust camshafts 20 and 22 .
  • a mounting boss part 24 b is disposed at a front center of the cam cap 24 to be correspondingly secured to the mounting boss part 16 a of the chain guide 16 .
  • a cut-out portion 24 c is formed at a rear part of the mounting boss part 24 b of the cam cap 24 to reduce the weight of the components.
  • the chain guide 16 may be integrally manufactured with the cam cap 24 .
  • the crankshaft sprocket 10 and camshaft sprocket 12 interact with each other via the timing chain 14 for periodically opening and closing an intake and exhaust valve of an engine.
  • the chain guide 16 for restricting the vertical movement of the timing chain 14 , is installed either at an adjacent portion of the camshaft sprocket 12 or between the intake camshaft sprocket 12 a and the exhaust camshaft sprocket 12 b , such that vertical movement of the timing chain 14 according to the driving torque variation periodically generated from the camshaft sprocket 12 can be forcibly restricted.
  • timing chain 14 is restricted in vertical movement via the chain guide 16 , the camshaft sprocket 12 and timing chain 14 uniformly engage with each other, so that noise emitted during the engagement is reduced. Furthermore, wear and tear on the components due to an uneven engagement is prevented, contributing to an increase in durability of the components.
  • cam cap assembled at the journal part 18 a of the cylinder head 18 thus described for fixing the intake and exhaust camshaft 20 and 22 may be replaced by a cam cap 24 which fixes the intake and exhaust camshaft 20 and 22 at the same time, resulting in a reduction of the number of cam caps required during an engine assembly in comparison with the typical decoupled cam cap, and facilitation of maintaining the components.
  • the cam cap 24 used for installing the chain guide 16 is formed with the cut-out portion 24 c at the rear portion of the mounting boss part 24 b , thus reducing the weight of the cam cap integrally manufactured.
  • the supporting structure of the engine timing chain includes the chain guide 16 and the timing chain 14 , which transmits power between the crankshaft sprocket 10 and the camshaft sprocket 12 , thereby restricting vertical movement of the timing chain 14 in conjunction with the periodic change of the driving torque from the camshaft sprocket 12 , reducing noise generated by an abnormal meshing between the camshaft sprocket 12 and timing chain 14 , and optimizing the life of components.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US10/738,291 2003-04-10 2003-12-16 Supporting structure for engine timing chain Abandoned US20040200447A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020030022621A KR20040088657A (ko) 2003-04-10 2003-04-10 엔진의 타이밍 체인 지지구조
KR2003-22621 2003-04-10

Publications (1)

Publication Number Publication Date
US20040200447A1 true US20040200447A1 (en) 2004-10-14

Family

ID=33129002

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/738,291 Abandoned US20040200447A1 (en) 2003-04-10 2003-12-16 Supporting structure for engine timing chain

Country Status (4)

Country Link
US (1) US20040200447A1 (ko)
JP (1) JP2004316636A (ko)
KR (1) KR20040088657A (ko)
CN (1) CN1536246A (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647738A1 (en) * 2004-10-15 2006-04-19 Morse Tec Europe S.R.L. Guide device for the chain of the timing system of an internal combustion engine, in particular of a V-engine
CN101737216A (zh) * 2008-11-25 2010-06-16 现代自动车株式会社 配备燃油泵的汽油直喷式发动机
DE102013211917A1 (de) * 2013-06-24 2014-12-24 Schaeffler Technologies Gmbh & Co. Kg Riementrieb einer Brennkraftmaschine
JP2018105134A (ja) * 2016-12-22 2018-07-05 トヨタ自動車株式会社 カムシャフト支持部材

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363335B (zh) * 2008-09-03 2013-03-27 奇瑞汽车股份有限公司 正时链传动及机油泵驱动系统
JP5853808B2 (ja) * 2012-03-26 2016-02-09 スズキ株式会社 内燃機関のタイミングチェーンガイド装置
JP5873381B2 (ja) * 2012-04-24 2016-03-01 富士重工業株式会社 エンジンのチェーンガイド構造
CN107461465A (zh) * 2017-07-14 2017-12-12 江苏永钢集团有限公司 一种路轨式链条防滑轨装置及其安装方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030013362A1 (en) * 2001-07-10 2003-01-16 Suzuki Kabushiki Kaisha Four-stroke-cycle engine of an outboard motor
US6662771B2 (en) * 2000-09-18 2003-12-16 Honda Giken Kogyo Kabushiki Kaisha Timing chain lubricating system for engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6662771B2 (en) * 2000-09-18 2003-12-16 Honda Giken Kogyo Kabushiki Kaisha Timing chain lubricating system for engine
US20030013362A1 (en) * 2001-07-10 2003-01-16 Suzuki Kabushiki Kaisha Four-stroke-cycle engine of an outboard motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647738A1 (en) * 2004-10-15 2006-04-19 Morse Tec Europe S.R.L. Guide device for the chain of the timing system of an internal combustion engine, in particular of a V-engine
US20060084539A1 (en) * 2004-10-15 2006-04-20 Morse Tec Europe, S.R.L. Guide device for a chain of a timing system of an internal combusion engine
CN101737216A (zh) * 2008-11-25 2010-06-16 现代自动车株式会社 配备燃油泵的汽油直喷式发动机
DE102013211917A1 (de) * 2013-06-24 2014-12-24 Schaeffler Technologies Gmbh & Co. Kg Riementrieb einer Brennkraftmaschine
JP2018105134A (ja) * 2016-12-22 2018-07-05 トヨタ自動車株式会社 カムシャフト支持部材

Also Published As

Publication number Publication date
CN1536246A (zh) 2004-10-13
KR20040088657A (ko) 2004-10-20
JP2004316636A (ja) 2004-11-11

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Date Code Title Description
AS Assignment

Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KIM, GYU-WAN;REEL/FRAME:014809/0245

Effective date: 20031208

STCB Information on status: application discontinuation

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