WO2017069101A1 - Mécanisme de soupape variable - Google Patents

Mécanisme de soupape variable Download PDF

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Publication number
WO2017069101A1
WO2017069101A1 PCT/JP2016/080776 JP2016080776W WO2017069101A1 WO 2017069101 A1 WO2017069101 A1 WO 2017069101A1 JP 2016080776 W JP2016080776 W JP 2016080776W WO 2017069101 A1 WO2017069101 A1 WO 2017069101A1
Authority
WO
WIPO (PCT)
Prior art keywords
camshaft
variable valve
valve mechanism
magnetic field
cams
Prior art date
Application number
PCT/JP2016/080776
Other languages
English (en)
Japanese (ja)
Inventor
宏 角田
Original Assignee
いすゞ自動車株式会社
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 いすゞ自動車株式会社 filed Critical いすゞ自動車株式会社
Priority to CN201680058651.3A priority Critical patent/CN108138611B/zh
Publication of WO2017069101A1 publication Critical patent/WO2017069101A1/fr

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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/038—Measuring direction or magnitude of magnetic fields or magnetic flux using permanent magnets, e.g. balances, torsion devices
    • 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
    • F01L2013/0052—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 with cams provided on an axially slidable sleeve
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets

Definitions

  • the present disclosure relates to a variable valve mechanism, and more particularly, to a variable valve mechanism that can reliably and easily determine a combination of a cam and a valve that are currently switched.
  • a camshaft to which a plurality of cams having different cam profiles are fixed is slid in the axial direction according to operating conditions.
  • a variable valve mechanism that switches a combination of a cam and a valve is used (see, for example, Patent Document 1).
  • the sliding of the camshaft in the axial direction is performed by engaging a switching pin with a meandering slide groove formed on the outer peripheral surface of the camshaft.
  • a switching pin for example, in the case of two types of cams, in order to slide the cam shaft to the left and right, two slide grooves that curve in opposite directions and two switching pins that can be engaged with the respective slide grooves are required. become.
  • This switching pin is ejected toward the slide groove by the repulsive force of the electromagnetic coil through the hole guided to the engine side and engaged, and after sliding the camshaft in accordance with the rotation of the camshaft, the permanent magnet It is designed to return to its original position by the magnetic force.
  • the two switching pins may be simultaneously engaged with the slide groove.
  • the variable valve mechanism is damaged, and in the worst case, it is broken.
  • This disclosure provides a variable valve mechanism that can reliably and easily discriminate a combination of a cam and a valve that are currently switched.
  • variable valve mechanism includes an axially slidable camshaft, two types of cams that are fixed at a predetermined distance on an outer periphery of the camshaft and have different profiles, and the two types of cams And a switching means for switching a combination of the two types of cams and the valve by sliding the camshaft in the axial direction by the predetermined distance, and the switching means,
  • a variable valve mechanism comprising a meandering slide groove formed on the outer peripheral surface of the camshaft and a switching pin engageable with the slide groove, and a magnetic field changing means is provided on the outer peripheral surface of the camshaft.
  • the two magnetic sensors are arranged so as to face at least a part of the magnetic field changing means before and after sliding of the camshaft.
  • magnetic field changing means means a shape or member having a function of changing the state of the surrounding magnetic field or the state of the magnetic field generated by itself.
  • variable valve mechanism of the present disclosure the switching of the combination of the cam and the valve is detected in a non-contact manner as a magnetic field change by the two magnetic sensors and the magnetic field changing means. It is possible to reliably and easily determine the combination of the cam and the valve.
  • FIG. 1 is a partial cross-sectional view illustrating a configuration of a variable valve mechanism according to the first embodiment of the present disclosure.
  • FIG. 2 is a partial cross-sectional view showing a state at the start of the operation of the switching means.
  • FIG. 3 is a partial sectional view showing a state when the operation of the switching means is completed.
  • FIG. 4 is a configuration diagram of the magnetic sensor in FIG.
  • FIG. 5 is a partial cross-sectional view illustrating a configuration of a variable valve mechanism according to the second embodiment of the present disclosure.
  • FIG. 6 is a configuration diagram of the magnetic sensor in FIG.
  • FIG. 7 is a partial cross-sectional view showing a state in which one cam in FIG. 5 is combined with a valve.
  • FIG. 8 is a partial cross-sectional view showing a state where the other cam in FIG. 5 is combined with the valve.
  • FIG. 1 shows a variable valve mechanism according to the first embodiment of the present disclosure.
  • the variable valve mechanism 1X includes a camshaft 2 slidable in the axial direction, two types of cams 3A and 3B having different profiles and fixed to each other at a predetermined distance L on the outer periphery of the camshaft 2.
  • a valve 4 whose opening / closing operation is controlled by two types of cams 3A and 3B, and a switching means 5 for switching the combination of the cams 3A and 3B and the valve 4 by sliding the cam shaft 2 by a predetermined distance L in the axial direction are provided. ing.
  • the switching means 5 is formed on the outer peripheral surface of the camshaft 2 and has two slide grooves 6A and 6B that draw curves that move in the opposite directions by a distance L, and 2 that can be engaged with each slide groove 6A and 6B.
  • the outer circumferential surface of the camshaft 2 is formed with a narrow groove 10 that extends in the circumferential direction, which is a magnetic field changing means, and each of the narrow grooves 10 before and after the slide of the camshaft 2.
  • Two magnetoresistive sensors 11A and 11B are arranged at a distance L so as to face each other.
  • magnetoresistive sensors 11A and 11B are surrounded by a hollow permanent magnet 12 as shown in FIG.
  • the bias magnetic field by the hollow permanent magnet 12 is lowered, so that the resistance values of the magnetoresistive sensors 11A and 11B are reduced and the output voltage is lowered.
  • the bias magnetic field by the hollow permanent magnet 12 increases, so that the resistance values of the magnetoresistive sensors 11A and 11B increase and the output voltage increases.
  • the narrow groove 10 faces the magnetoresistive sensor 11A on the left side, so that the output voltage of the magnetoresistive sensor 11A becomes high. At the same time, the output voltage of the other magnetoresistive sensor 11B is lowered. Further, as shown in FIG. 3, when the camshaft 2 slides to the right and the other cam 3A and the valve 4 are combined, the narrow groove 10 faces the magnetoresistive sensor 11B on the right side. Therefore, the output voltage of the magnetoresistive sensor 11B increases and the output voltage of the other magnetoresistive sensor 11A decreases.
  • FIG. 5 shows a variable valve mechanism according to the second embodiment of the present disclosure.
  • symbol is attached
  • variable valve mechanism 1Y three permanent magnets 13A, 13B, and 13C are sequentially arranged so that adjacent magnetic poles are different from each other at a distance L along the axial direction on the outer peripheral surface of the camshaft 2 as a magnetic field changing means. It is arranged.
  • Two Hall IC sensors 14A and 14B are arranged so as to face two adjacent magnets among the permanent magnets 13A, 13B, and 13C before and after the camshaft 2 slides.
  • the method for fixing the three permanent magnets 13A, 13B, and 13C to the outer peripheral surface of the camshaft 2 is not particularly limited.
  • an aluminum thin cylindrical body 15 having three permanent magnets 13 ⁇ / b> A, 13 ⁇ / b> B, 13 ⁇ / b> C bonded to the surface is fixed by being externally fitted to the camshaft 2.
  • the magnetic poles of the three permanent magnets 13A, 13B, and 13C may be S poles, N poles, S poles in order, or N poles, S poles, and N poles in order.
  • the Hall IC sensors 14A and 14B are composed of a Hall element and an electronic circuit, and have a function of converting a magnetic field change into an electric signal by the Hall effect and outputting it.
  • variable valve mechanism 1Y As shown in FIG. 7, when one cam 3B and the valve 4 are combined, the permanent magnets 13B and 13C face the Hall IC sensors 14A and 14B, respectively. As shown in FIG. 8, when the camshaft 2 slides to the right and the other cam 3A and the valve 4 are combined, the permanent magnets 13A and 13B are applied to the Hall IC sensors 14A and 14B, respectively. opposite. The movement state of the camshaft 2 can be detected from changes in the output signals of the Hall IC sensors 14A and 14B at this time.
  • variable valve mechanisms 1X and 1Y can reliably and easily determine the currently switched cam and valve combination, and are preferably installed in an engine body of a diesel engine mounted on a vehicle. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

L'invention concerne un mécanisme de soupape variable (1X), dans lequel mécanisme des broches de commutation (7A et 7B) viennent en prise dans des rainures de coulissement en forme de méandre (6A et 6B) formées dans la surface périphérique externe d'un arbre à cames (2) qui est apte à coulisser dans la direction axiale et sur lesquelles deux types de cames (3A et 3B) ayant des profils différents sont fixés de manière à avoir une distance (L) entre ces derniers, et, en résultat de la prise, l'assemblage des cames (3A) et (3B) et d'une soupape (4) est commuté. Une rainure étroite (10) est formée dans la surface périphérique externe de l'arbre à cames (2), et deux capteurs magnéto-résistifs (11A et 11B) sont agencés de façon à s'opposer à cette rainure étroite (10) en alternance quand l'arbre à cames (2) coulisse vers l'avant et vers l'arrière.
PCT/JP2016/080776 2015-10-19 2016-10-18 Mécanisme de soupape variable WO2017069101A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680058651.3A CN108138611B (zh) 2015-10-19 2016-10-18 可变气门机构

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-205730 2015-10-19
JP2015205730A JP6672693B2 (ja) 2015-10-19 2015-10-19 可変動弁機構

Publications (1)

Publication Number Publication Date
WO2017069101A1 true WO2017069101A1 (fr) 2017-04-27

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PCT/JP2016/080776 WO2017069101A1 (fr) 2015-10-19 2016-10-18 Mécanisme de soupape variable

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JP (1) JP6672693B2 (fr)
CN (1) CN108138611B (fr)
WO (1) WO2017069101A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4403754A1 (fr) * 2023-01-19 2024-07-24 Ktm Ag Dispositif de commande de soupape

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019105938A1 (de) 2019-03-08 2020-09-10 Eto Magnetic Gmbh Elektromagnetische Stellvorrichtung mit adaptierbarer Stößelanordnung
DE102019106365A1 (de) * 2019-03-13 2020-09-17 Eto Magnetic Gmbh Elektromagnetische Stellanordnung
CN110017853A (zh) * 2019-05-13 2019-07-16 艾菲发动机零件（武汉）有限公司 基于gmr芯片的凸轮轴位置传感器电路结构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0742518A (ja) * 1993-08-03 1995-02-10 Yamaha Motor Co Ltd バルブタイミング可変装置
JPH07105809A (ja) * 1993-10-04 1995-04-21 Asa Denshi Kogyo Kk リニア変位センサ
JPH1172031A (ja) * 1996-11-19 1999-03-16 Toyota Motor Corp 内燃機関のバルブ特性制御装置
JP2011503426A (ja) * 2007-11-17 2011-01-27 ダイムラー・アクチェンゲゼルシャフト バルブトレイン装置
JP2013024141A (ja) * 2011-07-21 2013-02-04 Toyota Motor Corp 可変動弁機構の制御装置
JP2014052249A (ja) * 2012-09-06 2014-03-20 Tokai Rika Co Ltd ２軸ポジションセンサ及びそれを用いたシフトポジションセンサ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843080B1 (fr) * 1996-11-19 2002-10-16 Toyota Jidosha Kabushiki Kaisha Dispositif de commande variable pour soupapes de moteur à combustion interne

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0742518A (ja) * 1993-08-03 1995-02-10 Yamaha Motor Co Ltd バルブタイミング可変装置
JPH07105809A (ja) * 1993-10-04 1995-04-21 Asa Denshi Kogyo Kk リニア変位センサ
JPH1172031A (ja) * 1996-11-19 1999-03-16 Toyota Motor Corp 内燃機関のバルブ特性制御装置
JP2011503426A (ja) * 2007-11-17 2011-01-27 ダイムラー・アクチェンゲゼルシャフト バルブトレイン装置
JP2013024141A (ja) * 2011-07-21 2013-02-04 Toyota Motor Corp 可変動弁機構の制御装置
JP2014052249A (ja) * 2012-09-06 2014-03-20 Tokai Rika Co Ltd ２軸ポジションセンサ及びそれを用いたシフトポジションセンサ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4403754A1 (fr) * 2023-01-19 2024-07-24 Ktm Ag Dispositif de commande de soupape
AT526912A1 (de) * 2023-01-19 2024-08-15 Ktm Ag Ventiltriebvorrichtung

Also Published As

Publication number Publication date
CN108138611A (zh) 2018-06-08
JP2017078338A (ja) 2017-04-27
JP6672693B2 (ja) 2020-03-25
CN108138611B (zh) 2020-05-19

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