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WO2015122359A1 - 弁開閉時期制御装置 - Google Patents

弁開閉時期制御装置 Download PDF

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Publication number
WO2015122359A1
WO2015122359A1 PCT/JP2015/053321 JP2015053321W WO2015122359A1 WO 2015122359 A1 WO2015122359 A1 WO 2015122359A1 JP 2015053321 W JP2015053321 W JP 2015053321W WO 2015122359 A1 WO2015122359 A1 WO 2015122359A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotating body
adapter
driven
side rotating
camshaft
Prior art date
Application number
PCT/JP2015/053321
Other languages
English (en)
French (fr)
Inventor
野口祐司
朝日丈雄
Original Assignee
アイシン精機株式会社
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 アイシン精機株式会社 filed Critical アイシン精機株式会社
Priority to US15/118,197 priority Critical patent/US9938864B2/en
Priority to CN201580008500.2A priority patent/CN105980674B/zh
Publication of WO2015122359A1 publication Critical patent/WO2015122359A1/ja

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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/356—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate, e.g. non-homokinetic 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/34433—Location oil control 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34456—Locking in only one position
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34453—Locking means between driving and driven members
    • F01L2001/34469—Lock movement parallel to camshaft axis
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34479—Sealing of phaser 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/3445—Details relating to the hydraulic means for changing the angular relationship
    • F01L2001/34483—Phaser return springs
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/02—Camshaft drives characterised by their transmission means the camshaft being driven by 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/031—Electromagnets

Definitions

  • the present invention relates to a valve opening / closing timing control device equipped to control the opening / closing timing of an intake valve and an exhaust valve, for example, in an automobile internal combustion engine.
  • Patent Documents 1 and 2 a drive-side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, and a driven-side rotation that is disposed on the inner side of the drive-side rotating body so as to be relatively rotatable with a coaxial core with the drive-side rotating body.
  • An adapter disposed coaxially with the driven-side rotating body between the driven body-rotating body and the valve opening / closing camshaft of the internal combustion engine; and A screw member that clamps and fixes the driven-side rotating body and the camshaft together, and a phase change mechanism that can change a relative rotation phase between the driving-side rotating body and the driven-side rotating body.
  • a valve opening / closing timing control device is described.
  • valve timing control device If the accuracy (coaxial accuracy) with which the rotation axis of the driven side rotating body and the rotation axis of the camshaft coincide is low, the operation of the valve timing control device may be hindered.
  • the driven-side rotating body is assembled to the camshaft with a coaxial core via an adapter fitted on the screw member.
  • the coaxial accuracy of the driven side rotating body and the camshaft depends on the mounting accuracy of the driven side rotating body with respect to the adapter and the mounting accuracy of the adapter with respect to the screw member, and these mounting accuracy are related to each other. Therefore, it is difficult to improve the coaxial accuracy.
  • an adapter is press-fitted into the inner peripheral side of the driven-side rotator and assembled together, and the integrally assembled driven-side rotator and adapter are fastened to the camshaft with a screw member.
  • the driven rotary body is fixed and assembled to the camshaft with a coaxial core.
  • the coaxial accuracy of the driven side rotating body and the camshaft depends on the mounting accuracy of the driven side rotating body to the adapter and the mounting accuracy of the screw member of the driven side rotating body and the adapter assembled to the camshaft. Since the assembly accuracy is also related to each other, it is difficult to improve the coaxial accuracy.
  • the present invention has been made in view of the above circumstances, and it is desired to provide a valve opening / closing timing control device that can easily improve the coaxial accuracy between the driven-side rotating body and the camshaft.
  • a characteristic configuration of a valve opening / closing timing control device includes a driving side rotating body that rotates synchronously with a crankshaft of an internal combustion engine, and an inner side of the driving side rotating body that is relatively rotatable on the same axis as the driving side rotating body.
  • a driven-side rotating body, an adapter disposed coaxially with the driven-side rotating body between the driven-side rotating body and the valve opening / closing camshaft of the internal combustion engine, and a camshaft and coaxial core A fixing member that integrally fixes the driven-side rotator and the camshaft across the adapter, and a phase change mechanism that can change a relative rotation phase between the drive-side rotator and the driven-side rotator.
  • the driven-side rotating body has a portion that is crimped to the fixing member with a coaxial core, and is fixed to the adapter with a gap in the radial direction.
  • the driven-side rotator has a portion that is crimped to the fixing member with a coaxial core, and is fixed to the adapter with a gap in the radial direction.
  • the coaxial accuracy of the driven side rotating body and the camshaft can be set according to the mounting accuracy of the driven side rotating body with respect to the fixing member regardless of the mounting accuracy of the adapter with respect to the fixing member or the camshaft. Therefore, with the valve opening / closing timing control device of this configuration, it is easy to improve the coaxial accuracy between the driven rotary body and the camshaft.
  • Another characteristic configuration of the present invention is that a relative rotation restricting portion capable of restricting relative rotation between the driven-side rotator and the adapter is provided across the driven-side rotator and the adapter. .
  • the relative rotation of a driven side rotary body and an adapter can be controlled, and the relative rotation of an adapter and a drive side rotary body can be stabilized.
  • the phase can be set to a predetermined phase.
  • the relative rotation restricting portion is provided on a pin member fixed to one of the driven side rotating body and the adapter, and on the other side of the driven side rotating body and the adapter.
  • the pin member includes a recess inserted along a longitudinal direction of the camshaft, and the recess is formed in a long hole shape so that a gap is formed along the radial direction between the pin member and the pin member. It is in the point.
  • the driven-side rotator is formed of an aluminum material
  • the adapter is formed of a steel material
  • the pin member is fixed to the adapter
  • the concave portion is formed on the driven-side rotator. It is in the point provided.
  • Another feature of the present invention is that the adapter is fitted to the fixing member.
  • the adapter can be assembled with the camshaft with a coaxial core separately from the driven-side rotator, so that the rotational accuracy of the drive-side rotator supported by the adapter is increased. As a result, the driving side rotating body and the driven side rotating body can be smoothly relatively rotated.
  • FIG. 2 is a sectional view taken along line II-II in FIG. It is a disassembled perspective view which shows the structure of a valve opening / closing timing control apparatus.
  • FIGS. 1 and 2 show a valve timing control apparatus according to the present invention, which is provided in an automobile engine (an example of an internal combustion engine).
  • the valve opening / closing timing control device is disposed in a steel housing (drive-side rotator) 1 that rotates synchronously with the crankshaft 101 of the engine E, and is disposed inside the housing 1 so as to be rotatable relative to the housing 1 with a coaxial core X.
  • a steel housing drive-side rotator 1 that rotates synchronously with the crankshaft 101 of the engine E
  • the valve opening / closing timing control device is disposed in a steel housing (drive-side rotator) 1 that rotates synchronously with the crankshaft 101 of the engine E, and is disposed inside the housing 1 so as to be rotatable relative to the housing 1 with a coaxial core X.
  • a cylindrical steel adapter 3 having a support surface 3a on the outer peripheral side capable of supporting the housing 1 in a relatively rotatable manner, a phase changing mechanism 4 capable of changing the relative rotational phase between the housing 1 and the internal rotor 2, and an engine
  • a lock mechanism 5 is provided that restrains the relative rotational phase of the housing 1 and the internal rotor 2 to the most retarded phase when stopped.
  • the housing 1 is integrally assembled with a front plate 1a disposed on the side opposite to the side where the camshaft 102 is present, an external rotor 1b externally mounted on the internal rotor 2, and a rear plate 1c integrally provided with a timing sprocket 1d. Configured.
  • a fluid pressure chamber 7 is formed between the inner rotor 2 and the outer rotor 1b. is there.
  • a partition 8 that partitions the fluid pressure chamber 7 into an advance chamber 7a and a retard chamber 7b is formed in a portion of the outer peripheral portion of the internal rotor 2 facing the fluid pressure chamber 7.
  • the phase changing mechanism 4 is provided so that the relative rotational phase can be changed by supplying oil (working fluid) to one of the advance chamber 7a or the retard chamber 7b and discharging the oil from the other.
  • the inner rotor 2 and the adapter 3 are coaxial with the camshaft 102 by screwing a steel OCV bolt 9 fitted into the inner rotor 2 and the adapter 3 with a coaxial core X to the end of the camshaft 102. It is assembled so as to rotate integrally with the core X.
  • the OCV bolt 9 is disposed on the same axis X as the camshaft 102, and corresponds to a fixing member such as a screw member that can fix the inner rotor 2 and the camshaft 102 together by sandwiching the adapter 3 therebetween.
  • Each of the internal rotor 2 and the adapter 3 has a portion that is crimped with a coaxial core to the OCV bolt 9, cannot move in the radial direction with respect to the outer peripheral surface of the OCV bolt 9, and is in the direction of the axial core X. It is fitted and fixed separately for each movement. Since the adapter 3 is externally fixed to the OCV bolt 9 and assembled to the camshaft 102 with the coaxial core X, the rotational accuracy of the housing 1 supported by the adapter 3 is increased.
  • Each of the inner rotor 2 and the adapter 3 may be externally fitted and fixed to the outer peripheral surface of the OCV bolt 9 so as not to move in the radial direction and the direction of the axis X.
  • the end of the camshaft 102 is fitted with a coaxial core X into a concave surface portion 3 b formed in a cylindrical shape at the end of the adapter 3.
  • the adapter 3 includes a small-diameter portion 3c that forms the support surface 3a, and a large-diameter portion 3d that functions to prevent the rear plate 1c from coming off.
  • the outer peripheral surface of the large-diameter portion 3d is arranged so that the large-diameter portion 3d enters the concave surface portion 2a formed in a cylindrical shape at the end of the inner rotor 2 so that the inner rotor 2 does not contact the adapter 3 in the rotational radial direction.
  • a gap 10 is provided between them.
  • a relative rotation restricting portion 11 capable of restricting relative rotation between the inner rotor 2 and the adapter 3 is provided across the inner rotor 2 and the adapter 3.
  • the relative rotation restricting portion 11 fixes the columnar pin member 11a to the adapter 3 in a posture in which the pin axis is parallel to the rotation axis X, and allows the pin member 11a to move only in the radial direction.
  • the inner rotor 2 is provided with a recess 11b that engages with the inner rotor 2.
  • the recess 11b is formed in a long slot shape along the rotational radius direction.
  • the internal rotor 2 and the adapter 3 can be moved relative to each other in the rotational radial direction so as to be concentric, thereby improving the assemblability.
  • the relative rotational phase between the internal rotor 2 and the adapter 3 after the OCV bolt 9 is assembled can be set to a predetermined phase.
  • a circumferential groove that forms a supply annular oil passage 13 communicating with the supply oil passage 13 a connected to the pump P with the outer peripheral surface of the OCV bolt 9 is provided.
  • a circumferential groove is formed between the outer circumferential surface of the OCV bolt 9 and a relay annular oil passage 15 that relays so as to communicate with each other.
  • the advance oil passage 12a is provided so as to penetrate the internal rotor 2 in the radial direction for each advance chamber 7a.
  • the retard oil passage 14a is formed across the large diameter portion 3d of the adapter 3 and the internal rotor 2 for each retard chamber 7b.
  • the retarding annular oil passage 14 is provided along the inner peripheral side corner of the adapter 3 so as to face the outer peripheral surface of the OCV bolt 9 and the bottom surface of the concave portion 2a.
  • the groove side surface 14b that partitions the side of the retarding annular oil passage 14 near the camshaft 102 is formed in a conical surface shape that approaches the camshaft 102 side as the OCV bolt 9 is approached.
  • the OCV bolt 9 when the OCV bolt 9 is fitted into the internal rotor 2 and the adapter 3, the OCV bolt 9 is the retarded annular oil even if the axis of the adapter 3 is eccentric with respect to the rotation axis X. It is difficult to get caught in the circumferential groove portion forming the path 14.
  • the camshaft 102 is a rotating shaft of the cam 104 that opens and closes the intake valve 103 as shown in FIG. 1, and rotates in synchronization with the OCV bolt 9, the internal rotor 2, and the adapter 3.
  • the camshaft 102 is rotatably supported by a cylinder head (not shown) of the engine.
  • crankshaft 101 When the crankshaft 101 is rotationally driven, rotational power is transmitted to the timing sprocket 1d through the power transmission member 105, and the housing 1 is rotationally driven in the rotational direction S shown in FIG.
  • the housing 1 As the housing 1 is driven to rotate, the internal rotor 2 is driven to rotate in the rotational direction S to rotate the camshaft 102, and the cam 104 provided on the camshaft 102 pushes down the intake valve 103 to open it.
  • a torsion coil spring 16 that urges the rotational phase of the internal rotor 2 relative to the housing 1 in the advance angle direction S1 is mounted across the internal rotor 2 and the rear plate 1c.
  • the advance direction S1 is a direction in which the volume of the advance chamber 7a is increased
  • the retard direction S2 is a direction in which the volume of the retard chamber 7b is increased.
  • the relative rotation phase when the volume of the advance chamber 7a is maximum is the most advanced angle phase
  • the relative rotation phase when the volume of the retard chamber 7b is maximum is the most retarded phase.
  • the phase changing mechanism 4 moves the spool 17 attached to the inside of the OCV bolt 9 by the operation of the solenoid 4a, thereby supplying or discharging oil to the advance chamber 7a and the retard chamber 7b, or blocking the supply and discharge thereof.
  • the relative rotational phase is changed to the advance direction or the retard direction, or the desired relative rotational phase is maintained.
  • the lock mechanism 5 includes a lock member 5a attached to the internal rotor 2 so as to be able to move in and out of the rotation axis X toward the housing 1, a lock recess formed in the housing 1, and a lock that supplies oil for unlocking the lock. And a release oil passage 5c.
  • the unlocking oil passage 5c communicates with the advance angle annular oil passage 12.
  • the lock mechanism 5 engages the lock member 5a with the lock recess 5b by the biasing force of a biasing member such as a spring when the engine is stopped, and restrains the relative rotational phase of the housing 1 and the internal rotor 2 to the most retarded phase.
  • a biasing member such as a spring when the engine is stopped.
  • the valve timing control apparatus may include an adapter fixed so as not to contact the fixed member.
  • the valve opening / closing timing control apparatus may control the opening / closing timing of an exhaust valve equipped in an internal combustion engine.
  • valve opening / closing timing control device can be used for a valve opening / closing timing control device of an internal combustion engine for various applications such as automobiles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

　従動側回転体とカムシャフトの同軸精度の向上を図り易い弁開閉時期制御装置を提供する。クランクシャフトと同期回転する駆動側回転体と、駆動側回転体の内側に同軸芯で相対回転可能な従動側回転体と、従動側回転体とカムシャフトとの間に従動側回転体と同軸芯で配置されるアダプタと、カムシャフトと同軸芯で配置され、アダプタを挟んで従動側回転体とカムシャフトとを一体に固定する固定部材と、駆動側回転体と従動側回転体との相対回転位相を変更可能な位相変更機構とを備え、従動側回転体が、固定部材に対して同軸芯で圧着される部分を有し、アダプタに対して径方向に関して隙間を設けて固定されている。

Description

弁開閉時期制御装置
　本発明は、例えば自動車用内燃機関において、吸気弁や排気弁の開閉時期を制御するために装備される弁開閉時期制御装置に関する。
　特許文献１、２には、内燃機関のクランクシャフトと同期回転する駆動側回転体と、前記駆動側回転体の内側に当該駆動側回転体と同軸芯で相対回転可能に配置された従動側回転体と、前記従動側回転体と前記内燃機関の弁開閉用カムシャフトとの間に前記従動側回転体と同軸芯で配置されるアダプタと、前記カムシャフトと同軸芯で配置され、前記アダプタを挟んで前記従動側回転体と前記カムシャフトとを一体に締め付け固定するネジ部材と、前記駆動側回転体と前記従動側回転体との相対回転位相を変更可能な位相変更機構と、を備えている弁開閉時期制御装置が記載されている。
独国特許出願公開第１０２００８０５７４９２号明細書 特開２０１２－１７２５５９号公報
　従動側回転体の回転軸芯とカムシャフトの回転軸芯とが一致する精度（同軸精度）が低い場合は、弁開閉時期制御装置の作動に支障をきたすおそれがある。
　特許文献１の弁開閉時期制御装置は、ネジ部材に外嵌したアダプタを介して従動側回転体がカムシャフトに同軸芯で組み付けられている。
　このため、従動側回転体とカムシャフトとの同軸精度は、従動側回転体のアダプタに対する組み付け精度と、アダプタのネジ部材に対する組み付け精度とに依存しており、これらの組み付け精度は互いに関連し合っているので同軸精度の向上を図り難い。
　特許文献２の弁開閉時期制御装置は、従動側回転体の内周側にアダプタを圧入して互いに一体に組み付け、この一体に組み付けた従動側回転体とアダプタとをネジ部材でカムシャフトに締め付け固定して、従動側回転体がカムシャフトに同軸芯で組み付けられている。
　このため、従動側回転体とカムシャフトとの同軸精度は、従動側回転体のアダプタに対する組み付け精度と、一体に組み付けた従動側回転体とアダプタとのネジ部材によるカムシャフトに対する組み付け精度とに依存しており、これらの組み付け精度も互いに関連し合っているので同軸精度の向上を図り難い。
　本発明は上記実情に鑑みてなされたものであって、従動側回転体とカムシャフトとの同軸精度の向上を図り易い弁開閉時期制御装置を提供することが望まれている。
　本発明による弁開閉時期制御装置の特徴構成は、内燃機関のクランクシャフトと同期回転する駆動側回転体と、前記駆動側回転体の内側に当該駆動側回転体と同軸芯で相対回転可能に配置された従動側回転体と、前記従動側回転体と前記内燃機関の弁開閉用カムシャフトとの間に前記従動側回転体と同軸芯で配置されるアダプタと、前記カムシャフトと同軸芯で配置され、前記アダプタを挟んで前記従動側回転体と前記カムシャフトとを一体に固定する固定部材と、前記駆動側回転体と前記従動側回転体との相対回転位相を変更可能な位相変更機構と、を備え、前記従動側回転体が、前記固定部材に対して同軸芯で圧着される部分を有し、前記アダプタに対して径方向に関して隙間を設けて固定されている点にある。
　本構成の弁開閉時期制御装置は、従動側回転体が、固定部材に対して同軸芯で圧着される部分を有し、アダプタに対して径方向に関して隙間を設けて固定されている。
　このため、従動側回転体とカムシャフトとの同軸精度を、アダプタの固定部材やカムシャフトに対する組み付け精度にかかわらず、従動側回転体の固定部材に対する組み付け精度に応じて設定できる。
　したがって、本構成の弁開閉時期制御装置であれば、従動側回転体とカムシャフトとの同軸精度の向上を図り易い。
　本発明の他の特徴構成は、前記従動側回転体と前記アダプタとの相対回転を規制可能な相対回転規制部が、前記従動側回転体と前記アダプタとに亘って設けられている点にある。
　本構成であれば、従動側回転体とアダプタとの相対回転を規制して、アダプタと駆動側回転体との相対回転を安定させることができる。また、従動側回転体とアダプタとをそれらの位相を合わせて組み付ける際に好都合である。
　すなわち、従動側回転体とアダプタとに固定部材を通す前においては、両者が径方向に相対移動することを防止するものではない。これにより、径方向に隙間を介在させて組み付けられる従動側回転体とアダプタとに固定部材を通す際の組み付け性を向上させることができ、組み付け後は、従動側回転体とアダプタとの相対回転位相を所定の位相に設定できる。
　本発明の他の特徴構成は、前記相対回転規制部が、前記従動側回転体および前記アダプタのいずれか一方に固定されるピン部材と、前記従動側回転体および前記アダプタのいずれか他方に設けられ、前記ピン部材が前記カムシャフトの長手方向に沿って挿入される凹部とを備え、前記凹部は前記ピン部材との間に前記径方向に沿って隙間が形成されるよう長孔状に形成されている点にある。
　本構成であれば、ピン部材を凹部に係入するという簡単な構造で、従動側回転体とアダプタとの相対回転を規制することができる。
　本発明の他の特徴構成は、前記従動側回転体がアルミニウム材で形成され、前記アダプタが鋼材で形成されており、前記ピン部材が前記アダプタに固定され、前記凹部が前記従動側回転体に設けられている点にある。
　本構成であれば、ピン部材を鋼製のアダプタに固定してあるので、ピン部材のアダプタに対する固定に緩みが生じ難く、従動側回転体とアダプタとの相対回転を長期に亘って規制して、弁開閉時期を精度良く制御することができる。
　本発明の他の特徴構成は、前記アダプタが前記固定部材に嵌合される点にある。
　本構成であれば、従動側回転体とは別に、アダプタもカムシャフトに対して同軸芯で組み付けることができるため、アダプタに支持される駆動側回転体の回転精度が高まる。この結果、駆動側回転体と従動側回転体とを円滑に相対回転させることができる。
弁開閉時期制御装置の全体構成を示す断面図である。 図１におけるII－II断面図である。 弁開閉時期制御装置の構成を示す分解斜視図である。
　以下に本発明の実施の形態を図面に基づいて説明する。
　図１～図２は、自動車用エンジン（内燃機関の一例）に装備される本発明による弁開閉時期制御装置を示す。
　弁開閉時期制御装置は、エンジンＥのクランクシャフト１０１と同期回転する鋼製ハウジング（駆動側回転体）１と、ハウジング１の内側に当該ハウジング１と同軸芯Ｘで相対回転可能に配置され、エンジンの弁開閉用カムシャフト１０２と同期回転するアルミニウム合金製内部ロータ（従動側回転体）２と、内部ロータ２とカムシャフト１０２の端部との間に内部ロータ２と同軸芯Ｘで配置され、ハウジング１を相対回転自在に支持可能な支持面３ａを外周側に有する円筒状の鋼製アダプタ３と、ハウジング１と内部ロータ２との相対回転位相を変更可能な位相変更機構４と、エンジンの停止時にハウジング１と内部ロータ２との相対回転位相を最遅角位相に拘束するロック機構５とを備えている。
　ハウジング１は、カムシャフト１０２の存在側とは反対側に配置したフロントプレート１ａと、内部ロータ２に外装される外部ロータ１ｂと、タイミングスプロケット１ｄを一体に備えたリアプレート１ｃとを一体に組み付けて構成されている。
　外部ロータ１ｂの内周側に複数個の突出部６を回転軸芯Ｘの周りで間隔を隔てて形成することにより、内部ロータ２と外部ロータ１ｂとの間に流体圧室７を形成してある。
　内部ロータ２の外周部のうち流体圧室７に面する部分に、流体圧室７を進角室７ａと遅角室７ｂとに仕切る仕切部８を形成してある。
　位相変更機構４は、進角室７ａまたは遅角室７ｂの一方にオイル（作動流体）を供給すると共に他方からオイルを排出させることにより相対回転位相を変更可能に設けてある。
　内部ロータ２とアダプタ３は、内部ロータ２とアダプタ３との夫々に同軸芯Ｘで内嵌した鋼製のＯＣＶボルト９をカムシャフト１０２の端部に螺着することにより、カムシャフト１０２に同軸芯Ｘで一体回転するように組み付けてある。
　ＯＣＶボルト９が、カムシャフト１０２と同軸芯Ｘで配置され、アダプタ３を挟んで内部ロータ２とカムシャフト１０２とを一体に締め付け固定可能なネジ部材などの固定部材に相当している。
　内部ロータ２とアダプタ３の夫々は、ＯＣＶボルト９に対して同軸芯で圧着される部分を有し、ＯＣＶボルト９の外周面に対して径方向に移動不能、かつ、軸芯Ｘの方向に移動可能に各別に外嵌固定されている。
　アダプタ３はＯＣＶボルト９に外嵌固定してカムシャフト１０２に対して同軸芯Ｘで組み付けてあるので、アダプタ３に支持されるハウジング１の回転精度が高まる。
　なお、内部ロータ２とアダプタ３の夫々は、ＯＣＶボルト９の外周面に対して径方向および軸芯Ｘの方向に移動不能に外嵌固定されていてもよい。
　カムシャフト１０２の端部は、アダプタ３の端部に円筒状に形成した凹面部３ｂに同軸芯Ｘで嵌合している。
　アダプタ３は、支持面３ａを形成する小径部３ｃと、リアプレート１ｃからの抜け止め用として機能する大径部３ｄとを備えている。内部ロータ２の端部に円筒状に形成した凹面部２ａに大径部３ｄを入り込ませ、内部ロータ２がアダプタ３に対して回転径方向に関して当接しないように、大径部３ｄの外周面との間に隙間１０を設けてある。
　内部ロータ２とアダプタ３との相対回転を規制可能な相対回転規制部１１を、内部ロータ２とアダプタ３とに亘って設けてある。
　相対回転規制部１１は、円柱状のピン部材１１ａをピン軸芯が回転軸芯Ｘと平行な姿勢でアダプタ３に固定すると共に、ピン部材１１ａが回転径方向にのみ移動することを許容する状態で係入する凹部１１ｂを内部ロータ２に設けて構成してある。
　凹部１１ｂは、回転半径方向に沿って長い長孔状に形成してある。ピン部材１１ａがカムシャフト１０２の長手方向に沿って凹部１１ｂに挿入されると、凹部１１ｂとピン部材１１ａとの間には径方向に沿って隙間１１ｃが形成される。
　このため、内部ロータ２とアダプタ３とにＯＣＶボルト９を通す際には、内部ロータ２とアダプタ３を同芯になるように回転径方向に相対移動させて組み付け性を向上させることができ、ＯＣＶボルト９を組み付けた後の内部ロータ２とアダプタ３との相対回転位相を所定の位相に設定できる。
　内部ロータ２の内周面には、進角油路１２ａを介して進角室７ａに連通する進角用環状油路１２をＯＣＶボルト９の外周面との間に形成する周溝と、オイルポンプＰに接続される供給油路１３ａに連通する供給用環状油路１３をＯＣＶボルト９の外周面との間に形成する周溝とが設けられている。
　アダプタ３の内周面には、遅角油路１４ａを介して遅角室７ｂに連通する遅角用環状油路１４を形成する周溝と、供給油路１３ａと供給用環状油路１３とが連通するように中継する中継用環状油路１５をＯＣＶボルト９の外周面との間に形成する周溝とが設けられている。
　進角油路１２ａは、各進角室７ａ毎に内部ロータ２を径方向に貫通するように設けてある。遅角油路１４ａは、各遅角室７ｂ毎にアダプタ３の大径部３ｄと内部ロータ２とに亘って形成してある。
　遅角用環状油路１４は、ＯＣＶボルト９の外周面および凹面部２ａの底面に臨むようにアダプタ３の内周側角部に沿って設けてある。
　遅角用環状油路１４のカムシャフト１０２に近い側を仕切る溝側面１４ｂを、ＯＣＶボルト９に近づくほどカムシャフト１０２側に近づく円錐面状に形成してある。
　これにより、ＯＣＶボルト９を内部ロータ２とアダプタ３とに内嵌させる際に、アダプタ３の軸芯が回転軸芯Ｘに対して偏芯していても、ＯＣＶボルト９が遅角用環状油路１４を形成する周溝部分に引っ掛かり難い。
　カムシャフト１０２は、図１に示すように吸気弁１０３を開閉させるカム１０４の回転軸であり、ＯＣＶボルト９、内部ロータ２及びアダプタ３と同期回転する。カムシャフト１０２は、エンジンの図示しないシリンダヘッドに回転自在に支持されている。
　クランクシャフト１０１が回転駆動すると、動力伝達部材１０５を介してタイミングスプロケット１ｄに回転動力が伝達され、ハウジング１が図２に示す回転方向Ｓに回転駆動する。
　ハウジング１の回転駆動に伴い、内部ロータ２が回転方向Ｓに従動回転してカムシャフト１０２が回転し、カムシャフト１０２に設けられたカム１０４が吸気弁１０３を押し下げて開弁させる。ハウジング１に対する内部ロータ２の回転位相を進角方向Ｓ１に付勢する捩りコイルバネ１６を、内部ロータ２とリアプレート１ｃとに亘って装着してある。
　図２に示すように、進角方向Ｓ１は進角室７ａの容積が大きくなる方向であり、遅角方向Ｓ２は遅角室７ｂの容積が大きくなる方向である。進角室７ａの容積が最大となった時の相対回転位相が最進角位相であり、遅角室７ｂの容積が最大となった時の相対回転位相が最遅角位相である。
　位相変更機構４は、ＯＣＶボルト９の内側に装着したスプール１７をソレノイド４ａの作動で移動させることにより、進角室７ａ及び遅角室７ｂに対するオイルの供給、排出、又はその給排の遮断を制御して、相対回転位相を進角方向又は遅角方向へ変更し、或いは、所望の相対回転位相に保持する。
　ロック機構５は、ハウジング１に向けて回転軸芯Ｘの方向に出退可能に内部ロータ２に装着したロック部材５ａと、ハウジング１に形成したロック凹部と、ロック解除用のオイルを供給するロック解除油路５ｃとを備えている。
　ロック解除油路５ｃは進角用環状油路１２に連通されている。
　ロック機構５は、エンジンの停止時にロック部材５ａをバネなどの付勢部材の付勢力でロック凹部５ｂに嵌合させて、ハウジング１と内部ロータ２の相対回転位相を最遅角位相に拘束する。
　そして、相対回転位相を進角方向Ｓ１に変更するべく進角用環状油路１２にオイルを供給すると、ロック解除油路５ｃを通してロック凹部５ｂにオイルが供給され、ロック部材５ａが付勢力に抗してロック凹部５ｂから引退してロックを解除する。
〔その他の実施形態〕
１．本発明による弁開閉時期制御装置は、固定部材に接触しないように固定されたアダプタを備えていてもよい。
２．本発明による弁開閉時期制御装置は、内燃機関が装備する排気弁の開閉時期を制御するものであってもよい。
　本発明による弁開閉時期制御装置は、自動車その他の各種用途の内燃機関の弁開閉時期制御装置に利用することができる。
１  ハウジング（駆動側回転体）
２  内部ロータ（従動側回転体）
３　アダプタ
４　位相変更機構
９　固定部材（ＯＣＶボルト）
１０　隙間
１１　相対回転規制部
１１ａ　ピン部材
１１ｂ　係入部
１０１  クランクシャフト
１０２  カムシャフト
Ｘ　軸芯

Claims (5)

  1. 　内燃機関のクランクシャフトと同期回転する駆動側回転体と、
    　前記駆動側回転体の内側に当該駆動側回転体と同軸芯で相対回転可能に配置された従動側回転体と、
    　前記従動側回転体と前記内燃機関の弁開閉用カムシャフトとの間に前記従動側回転体と同軸芯で配置されるアダプタと、
    　前記カムシャフトと同軸芯で配置され、前記アダプタを挟んで前記従動側回転体と前記カムシャフトとを一体に固定する固定部材と、
    　前記駆動側回転体と前記従動側回転体との相対回転位相を変更可能な位相変更機構と、を備え、
    　前記従動側回転体が、前記固定部材に対して同軸芯で圧着される部分を有し、前記アダプタに対して径方向に関して隙間を設けて固定されている弁開閉時期制御装置。
  2. 　前記従動側回転体と前記アダプタとの相対回転を規制可能な相対回転規制部が、前記従動側回転体と前記アダプタとに亘って設けられている請求項１記載の弁開閉時期制御装置。
  3. 　前記相対回転規制部が、前記従動側回転体および前記アダプタのいずれか一方に固定されるピン部材と、前記従動側回転体および前記アダプタのいずれか他方に設けられ、前記ピン部材が前記カムシャフトの長手方向に沿って挿入される凹部とを備え、前記凹部は前記ピン部材との間に前記径方向に沿って隙間が形成されるよう長孔状に形成されている請求項２記載の弁開閉時期制御装置。
  4. 　前記従動側回転体がアルミニウム材で形成され、前記アダプタが鋼材で形成されており、
    　前記ピン部材が前記アダプタに固定され、前記凹部が前記従動側回転体に設けられている請求項３記載の弁開閉時期制御装置。
  5. 　前記アダプタが前記固定部材に嵌合される請求項１～４のいずれか１項記載の弁開閉時期制御装置。
PCT/JP2015/053321 2014-02-14 2015-02-06 弁開閉時期制御装置 WO2015122359A1 (ja)

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CN107191235A (zh) * 2016-03-14 2017-09-22 伊希欧1控股有限公司 凸轮相位器

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DE102018101972A1 (de) * 2017-03-21 2018-09-27 ECO Holding 1 GmbH Nockenwellenversteller für eine Nockenwelleneinrichtung und Nockenwelleneinrichtung
CN106837456A (zh) * 2017-03-27 2017-06-13 江苏海龙电器有限公司 可变气门正时系统
JP6954764B2 (ja) * 2017-05-12 2021-10-27 株式会社デンソー バルブタイミング調整装置
DE102019115084A1 (de) * 2019-06-05 2020-12-10 Schaeffler Technologies AG & Co. KG Nockenwelle mit Ölkanal, Nockenwellenversteller mit Nockenwelle sowie Montageverfahren für Nockenwellenversteller
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