EP2397660A2 - Structure d'élément de commande de soupape de moteur - Google Patents

Structure d'élément de commande de soupape de moteur Download PDF

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Publication number
EP2397660A2
EP2397660A2 EP11167016A EP11167016A EP2397660A2 EP 2397660 A2 EP2397660 A2 EP 2397660A2 EP 11167016 A EP11167016 A EP 11167016A EP 11167016 A EP11167016 A EP 11167016A EP 2397660 A2 EP2397660 A2 EP 2397660A2
Authority
EP
European Patent Office
Prior art keywords
driving member
valve
intake
engine according
exhaust
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.)
Granted
Application number
EP11167016A
Other languages
German (de)
English (en)
Other versions
EP2397660B1 (fr
EP2397660A3 (fr
Inventor
Jung-Feng Ting
Yeu-Jou Lin
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.)
Industrial Technology Research Institute ITRI
Kwang Yang Motor Co Ltd
Original Assignee
Industrial Technology Research Institute ITRI
Kwang Yang Motor Co Ltd
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 Industrial Technology Research Institute ITRI, Kwang Yang Motor Co Ltd filed Critical Industrial Technology Research Institute ITRI
Publication of EP2397660A2 publication Critical patent/EP2397660A2/fr
Publication of EP2397660A3 publication Critical patent/EP2397660A3/fr
Application granted granted Critical
Publication of EP2397660B1 publication Critical patent/EP2397660B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F01L1/267—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 with means for varying the timing or the lift of the valves
    • 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
    • F01L1/12—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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction

Definitions

  • the present invention generally relates to a. driving member of valve of engine, and more particularly to a structure of valve driving member of engine that simplifies engineering of variable lift of an engine valve.
  • FIG 1 of the attached drawings shows a conventional structure of valve variable-lift: mechanism for an engine, 1, wherein first and second driving members 21, 22 are arranged above an engine valve 2.
  • the second driving member 22 is a multiple-link assembly.
  • the first and second driving members 21., 22 may individually drive the engine valve 2 to realize variation of lift stroke of the engine valve 2.
  • the engine valve 2 is driven by the first driving member 21, the engine valve 2 is of a small lift opening condition, while when the engine valve 2 is driven by the second driving member 22, the engine valve 2 is of a large lift opening condition.
  • switching of intake and exhaust valves can be realized for different lifts of engine valve 2 according to rotational, speeds of the engine 1.
  • valve variable-lift mechanism for the engine 1 described above uses the first and second driving members 21, 22 arranged above the engine valve 2 to individually drive the engine valve 2. Although this is effective to realize switching of intake and exhaust valves for different lifts of engine valve 2 according to the rotational speeds of the engine i, yet the second driving member 22 is of a multiple-link assembly, which is complicated in structure and requires quite an amount of space for operation. Thus, the cylinder head 1 a of the engine 1 must be enlarged in order to provide a sufficient amount of space for the operation of the second driving member 22. Enlarging the cylinder head 1 a of the engine 1 will ce inly increase the cost of the engine 1 and also increase complication of engineering for the engine 1.
  • the primary objective of the present invention is to provide a structure of driving member of valve of engine, wherein the engine comprises a crankcase, a cylinder block mounted on the crankcase, and a cylinder head mounted on the cylinder block.
  • the cylinder head comprises an intake port and an intake valve and an exhaust port and an exhaust valve, and an oil control valve.
  • a cams seat is arranged between the intake valve and the exhaust valve.
  • the camshaft seat comprises a camshaft that is driven by a timing chain.
  • the camshaft comprises a first intake cam, a second intake cam, and an exhaust cam mounted thereto.
  • the intake valve driving member comprises a first driving member and a second driving member.
  • the first driving member forms a positioning hole, a bore, and a push roller and the second driving member forms a positioning hole, a bore, a push roller, and a pressing section.
  • the push roller of the first driving member is in engagement with the first cam and the push roller of the second driving member is in engagement with the second intake cam. Further, the pressing section of the second driving member is in engagement with the intake valve.
  • the bore of the first driving member and the bore of the second driving member are in communication with each other to form a hydraulic cylinder.
  • the hydraulic cylinder has two ends respectively closed by closure caps. ⁇ fho hydraulic cylinder receives therein a spring and first and second pistons.
  • the first driving member and the second driving member can be selectively driven to operate independent of each other or in combination with each other to vary the lift of an engine intake valve thereby sin1plifying the engineering of variable lift for engine intake vale.
  • Another objective of the present invention is to provide a structure of driving member of valve of engine, wherein a position-constraining mechanism is arranged above the cylinder head and the position-constraining mechanism comprises a position-constraining rod, a spring, and a pressure relief hole, whereby with the position-constraining mechanism being in pushing engagement with the first driving member and the second driving member the positioning bar, it is ensured that the bores of the first and second driving members can be set at predetermined locations.
  • a further objective of the present invention is to provide a structure of driving member of valve of engine, wherein the first driving member and the second driving member comprise positioning bars that are located between the positioning holes and the pressing section and the bores of the first and second driving members are located between, the push rollers and the positioning holes and located above a center-connection line connecting between centers of the push rollers and the positioning holes whereby the overall height of the cylinder head is effectively reduced.
  • the present invention provides an engine 3, which comprises a crankcase 31, a cylinder block 32 that is mounted on the crankcase 31, and a cylinder head 33 that is mounted on the cylinder block 32.
  • the crankcase 31 comprises a crankshaft (not shown) arranged therein.
  • the crankcase 31 comprises an oil pump 31 arranged therein.
  • the oil pump 311 pumps oil to a primary oil supply passage 312.
  • the primary oil supply passage 312 extends from the crankcase 31 through the cylinder block 32 to communicate an oil control valve 4 that is mounted to the cylinder head 33.
  • the cylinder block 32 is mounted on the crankcase 31 and receives a timing chain 5 to extend therethrough.
  • the cylinder block 32 comprises a timing chain tensioner 5 that is arranged at a side corresponding to an intake port 331 of the cylinder head 33.
  • the cylinder head 33 comprises the intake port 331 that is arranged at an intake side and an intake valve 332 and an exhaust port 333 that is arranged at an exhaust side and an exhaust valve 334.
  • the cylinder head 33 comprises a camshaft seat 335 that is integrally formed between the intake valve 332 and the exhaust valve 334.
  • the camshaft seat 335 comprises a camshaft 336 that is driven by the timing chain 5.
  • the camshaft 336 comprises a first intake cam (high lift cam) 3361, a second intake cam (low lift cam) 3362, and an exhaust cam 3363 mounted thereto.
  • the camshaft 336 when in rotation, may drive an intake valve driving member 6 and an exhaust valve driving member 7 of the intake valve 332 and the exhaust valve 334.
  • the exhaust valve driving member 7 has an end forming a pressing section 71, which is in engagement with the exhaust valve 334 and has an end forming a gap adjusting member 711, and an opposite end forming a push roller 72, which is in engagement with the exhaust cam 3363.
  • a bearing sleeve 73 extends sideways from a side of the exhaust valve driving member 7 for receiving the extension of a shaft rod 74 therethrough.
  • the exhaust valve driving member 7 is securely positioned, on the camshaft seat 335, whereby the exhaust cam 3363 of the camshaft 336 may drive the push roller 72 to have the pressing section 7 pressing the exhaust valve 334 for opening the exhaust valve to discharge exhaust gas.
  • a gap between the pressing section 71 and the exhaust valve 334 can be adjusted through the gap adjusting member 711 in order to ensure the exhaust valve 334 has a desired lift stroke.
  • the intake valve driving member 6 comprises a first driving member 61 and a second driving member 62.
  • the first driving member 61 forms in a front portion thereof a positioning hole 611, a positioning bar 612 being arranged to project from a front lower side of the positioning hole 611, and also forms a through bore 613 at a location behind the positioning hole 61 I , a push roller 614 being arranged behind the bore 613 .
  • the second driving member 62 forms, in sequence, a positioning hole 621, a positioning bar 622, a through bore 623, and a push roller 624.
  • the second driving member 62 comprises a pressing section 625 extending from a front side of the positioning hole 621 and the pressing section 625 has a front end forming a gap adjusting member 6251.
  • the push roller 614 of the first driving member 61 is set in engagement with the first intake cam 336 of the camshaft 336, while the push roller 624 of the second driving member 62 is in with the second intake cam 3362 of the camshaft 336. Further, the pressing section 625 of the second driving member 62 is in engagement with the intake valve 332. A gap between the pressing section 625 and the intake valve 332 can be adjusted through the gap adjusting member 6251 in order to ensure that the intake valve 332 has a desired lift stroke.
  • the first driving member 61 and the second driving member 62 are securely positioned on the camshaft seat 335, whereby the first driving member 61 and the second driving member 62 are reciprocally rotatable about a center defined by the shaft rod 63.
  • the positioning bars 612, 622 of the first driving member 61 and the second driving member 62 are respectively arranged at locations between the positioning holes 611, 621 and the pressing section 625.
  • the bores 613, 623 of the first driving member 61 and the second driving member 62 are located between the push rollers 614, 624 and the positioning holes 611, 621 and are located above a center-connection line A connecting between centers of the push roller 614, 624 and the positioning holes 611, 621 so as to effectively reduce the overall height of the cylinder head 33.
  • the bore 613 of the first driving member 61 and the bore 623 of the second driving member 62 are arranged to connect to and communicate each other to collectively form a hydraulic cylinder 64.
  • the hydraulic cylinder 64 has opposite ends that are respectively closed and sealed by closure caps 641a, 641b.
  • Each of the closure caps 641a,641b forms a projecting peg 6411a, 6411b extending inward of the hydraulic cylinder 64.
  • the hydraulic cylinder 64 receives therein a spring 642 and a first piston 643 and a second piston 644, which are hydraulically movable by oil pressure.
  • the hydraulic cylinder 64 is connected through driving oil passages 65,66 to the oil control valve 4 in order to receive hydraulic power therefrom.
  • the first piston 643 has two ends respectively forming a first recess 6431 and a second recess 6432 for the purposes of reducing weight of the first piston 643 and thus enhancing movability of the first piston 643 within the hydraulic cylinder 64.
  • the first recess 6431 is shaped to receive the projecting peg 6411a of the closure cap 641a therein and the projecting peg 6411b of the closure cap 641b is engageable with an end of the second piston 644, whereby the first piston 643 and the second piston 644 are spaced from the ends of the hydraulic cylinder 64 by distances to allow oil flowing through the driving oil passages 65, 66 into the hydraulic cylinder 64 may reliably move the first piston 643 and the second piston 644.
  • the first piston 643 and the second piston 644 are positionable at predetermined locations during their operations so as to ensure the movability of the first piston 643 and the second piston 644 within the hydraulic cylinder 64.
  • the cylinder head 33 is provided, at a location below the positioning bars 612,622, with a position-constraining mechanism 337.
  • the position-constraining mechanism 337 comprises a position-constraining rod 3371, a spring 3372, and a pressure relief hole 3373.
  • the position-constraining mechanism 337 is provided for supporting pushing engagement of the positioning bars 612, 622 in order to ensure that the bore 613 of the first driving member 6 and the bore 623 of the second driving member 62 can be set at predetermined locations. Further, when the position-constraining mechanism 337 is acted upon by undue pushing forces applied by the positioning bars 612, 622, the pressure relief hole 3373 is timely opened to release pressure in order to ensure the movability of the first piston 643 and the second piston 644 within the hydraulic cylinder 64.
  • the oil pump 31 arranged in the crankcase 31 pumps oil to the primary oil supply passage 312, which extends from the crankcase 3 through the cylinder block 32 to communicate the oil control valve 4 that is mounted to the cylinder head 3, wherein the oil control valve 4 supplies the oil into the driving oil passages 65,66 of the cylinder head 33 to feed into the hydraulic cylinder 64.
  • the oil pump 31 arranged in the crankcase 31 pumps oil to the primary oil supply passage 312, which extends from the crankcase 3 through the cylinder block 32 to communicate the oil control valve 4 that is mounted to the cylinder head 3, wherein the oil control valve 4 supplies the oil into the driving oil passages 65,66 of the cylinder head 33 to feed into the hydraulic cylinder 64.
  • the oil after flowing through the driving oil passage 65 into the bore 621 of the second driving member 62, is guided by the projecting peg 6411 of the closure cap 641a and the first piston 643 into the recess 643 of the first piston 643, and at the same time, the oil contained in the first driving member 61 is forced to discharge through the driving oil passage 66, whereby the second piston 644 is moved to locate within the first driving member 61 and is positioned at a predetermined location by the projecting peg 6411b of the closure cap 6411b at the side corresponding to the first driving member 61 and the first piston 643 is located in the second driving member 62. Under this condition, the first driving member 6 and the second driving member 62 are allowed to rotate independent of each other.
  • the intake valve 332 of the engine 3 is set in a low lift opening condition.
  • the ECU of the engine 3 instructs the oil control valve 4 to feed oil through the driving oil passage 66 into the hydraulic cylinder 64, as shown in FIG 9 , whereby the oil flows through the driving oil passage 66 into the bore 613 of the first driving member 6 and at the same time, the oil contained in the bore 623 of the second driving member 62 is discharged.
  • the first piston 643 and the second piston 644 are moved in a direction toward the second driving member 62 to have the first piston 643 located in the second driving member 62 and through the constrain imposed by the projecting peg 641 a of the closure cap 641a of the second driving member 62, the first piston 643 and the second piston 644 are located at predetermined locations where the second piston 644 is set between the first driving member 61 and the second driving member 62, whereby the first driving member 6 and the second driving member 62 are coupled to each other.
  • the second driving member 62 is moved by the first driving member 61 to set the intake valve 332 to a desired high lift opening condition according to the lift of the first intake cam (high lift cam) 3361. As such, variable valve lift of the engine 3 can be realized.
  • the camshaft 336 is provided with the first intake cam 3361, the second intake cam 3362, and the exhaust 3363
  • the intake valve driving member 6 comprises the first driving member & and the second driving member 62, and er
  • the bore 613 of the first driving member 61 and the bore 623 of the second driving member 62 are in communication with each other to form the hydraulic cylinder 64
  • the spring 642 and the first piston 643 and the second piston 644 that are movable hydraulically and by the spring 642 being contained within the hydraulic cylinder 64
  • the first driving member 61 and the second driving member 62 are selectively rotatable independent of each other or in combination with each other to vary lift stroke of the valve 332 of the engine 3, and thus simplifying engineering of variable lift for the engine valve 332 of the engine 3.
  • the positioning bars 612, 622 of the first driving ember 6 and the second driving member 62 located between the positioning holes 611, 621 and the pressing section 625 and with the bores 613, 623 of the first driving member 61 and the second driving member 62 located between the push rollers 613, 6232 and the positioning holes 611, 621 and located above the center-connection line At connecting between centers of the push rollers 614, 624 and the positioning holes 611, 621, the overall height of the cylinder head 33 is effectively reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP11167016.2A 2010-06-15 2011-05-23 Structure d'élément de commande de soupape de moteur Not-in-force EP2397660B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW099119479A TW201144574A (en) 2010-06-15 2010-06-15 Structure of driving member of engine valve

Publications (3)

Publication Number Publication Date
EP2397660A2 true EP2397660A2 (fr) 2011-12-21
EP2397660A3 EP2397660A3 (fr) 2012-04-25
EP2397660B1 EP2397660B1 (fr) 2016-02-10

Family

ID=44483946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11167016.2A Not-in-force EP2397660B1 (fr) 2010-06-15 2011-05-23 Structure d'élément de commande de soupape de moteur

Country Status (5)

Country Link
US (1) US20110303168A1 (fr)
EP (1) EP2397660B1 (fr)
JP (1) JP2012002222A (fr)
KR (1) KR101258793B1 (fr)
TW (1) TW201144574A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345477A (zh) * 2010-08-04 2012-02-08 光阳工业股份有限公司 引擎汽门推动件构造
EP2634386A1 (fr) * 2012-03-01 2013-09-04 Kwang Yang Motor Co., Ltd. Structure de soupape de commande d'huile pour levage variable de soupape de moteur
DE102012204367A1 (de) * 2012-03-20 2013-09-26 Man Diesel & Turbo Se Schaltbarer Schwinghebel

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
DE102014100748B4 (de) * 2014-01-23 2017-04-27 Pierburg Gmbh Übertragungsanordnung für einen mechanisch steuerbaren Ventiltrieb sowie mechanisch steuerbarer Ventiltrieb
TWI624586B (zh) * 2014-09-30 2018-05-21 光陽工業股份有限公司 雙缸引擎進氣偵測裝置及偵測方法
TWI580859B (zh) * 2015-07-23 2017-05-01 Kwang Yang Motor Co The rocker structure for the engine cylinder head
DE112022000552T5 (de) * 2021-03-11 2023-11-23 Eaton Intelligent Power Limited Verstellbare ventilhub-kipphebelbaugruppe

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345477A (zh) * 2010-08-04 2012-02-08 光阳工业股份有限公司 引擎汽门推动件构造
CN102345477B (zh) * 2010-08-04 2015-10-07 光阳工业股份有限公司 引擎汽门推动件构造
EP2634386A1 (fr) * 2012-03-01 2013-09-04 Kwang Yang Motor Co., Ltd. Structure de soupape de commande d'huile pour levage variable de soupape de moteur
DE102012204367A1 (de) * 2012-03-20 2013-09-26 Man Diesel & Turbo Se Schaltbarer Schwinghebel

Also Published As

Publication number Publication date
TWI379941B (fr) 2012-12-21
US20110303168A1 (en) 2011-12-15
KR20110136697A (ko) 2011-12-21
KR101258793B1 (ko) 2013-04-26
EP2397660B1 (fr) 2016-02-10
EP2397660A3 (fr) 2012-04-25
JP2012002222A (ja) 2012-01-05
TW201144574A (en) 2011-12-16

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