WO2019179191A1 - 一种用于内燃机凸轮轴的调整机构 - Google Patents

一种用于内燃机凸轮轴的调整机构 Download PDF

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Publication number
WO2019179191A1
WO2019179191A1 PCT/CN2018/123443 CN2018123443W WO2019179191A1 WO 2019179191 A1 WO2019179191 A1 WO 2019179191A1 CN 2018123443 W CN2018123443 W CN 2018123443W WO 2019179191 A1 WO2019179191 A1 WO 2019179191A1
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WIPO (PCT)
Prior art keywords
cam
camshaft
sleeve
spool
cam sleeve
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PCT/CN2018/123443
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English (en)
French (fr)
Inventor
张金伟
周强
张涛
李中林
王艳
Original Assignee
绵阳富临精工机械股份有限公司
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Application filed by 绵阳富临精工机械股份有限公司 filed Critical 绵阳富临精工机械股份有限公司
Priority to EP18910392.2A priority Critical patent/EP3770383A4/en
Publication of WO2019179191A1 publication Critical patent/WO2019179191A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • 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
    • F01L13/0047—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 the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • 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
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • 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
    • F01L2013/0078—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 by modification of cam contact point by axially displacing the camshaft
    • 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 invention relates to the field of camshaft adjustment mechanism design, and more particularly to an adjustment mechanism for a camshaft of an internal combustion engine.
  • the mainstream variable valve lift technology adopts the cam shifting method.
  • the cam sleeve is an integral spiral groove structure, and the spiral groove has an inconsistent radius on the circumference, and the spiral groove is set.
  • This structure accelerates the wear of the spool, and the camshaft is difficult to machine and the size is not easily ensured, which greatly increases the manufacturing cost of the camshaft sleeve.
  • the technical problem to be solved by the present invention is to provide a camshaft for an internal combustion engine which has a simple structure, high reliability, low manufacturing cost, and no need to provide a valve core ejection structure on a cam sleeve. Adjustment mechanism.
  • an adjustment mechanism for a camshaft of an internal combustion engine comprising a camshaft, a cam sleeve and a solenoid valve, wherein the cam sleeve is provided with a guiding protrusion portion
  • the valve core of the solenoid valve cooperates with the guiding protrusion for driving the cam sleeve to reciprocally move along the axial direction of the cam shaft, and the valve core is provided with an automatic return device connection, and after the solenoid valve is powered off, the valve core Return to the initial position under the action of the automatic return device.
  • the spool A and the spool B of the solenoid valve respectively cooperate with the side guiding groove surface A and the guiding groove surface B of the guiding protrusion, and the spool A and the spool B are respectively returned to the spool
  • the mechanism A is connected to the spool return mechanism B.
  • the cam sleeve is a unitary structure, and the high cam and the low cam on the cam sleeve move axially with the cam sleeve as a whole, and are axially restrained by the limiting mechanism after being moved into position.
  • the cam sleeve is a combined structure including a high cam, a low cam, a sleeve and a guiding protrusion, the high cam, the low cam and the guiding protrusion being fixed by riveting or interference pressing On the sleeve, and axially moving along with the guiding projection, and axially limiting by the limiting mechanism after moving into position.
  • the cam sleeve is of a split type structure, comprising a sleeve in the middle, a high and low cam set disposed at both ends of the sleeve, and guiding protrusions at both ends of the cam sleeve, the guiding protrusions respectively
  • the components of the cam sleeve of the split structure are relatively abutted, and move axially along the camshaft under the action of the solenoid valve, and after moving into position, the cam sleeve is two
  • the guiding projections of the ends are respectively axially restricted by corresponding limiting mechanisms.
  • the cam shaft and the cam sleeve are matched in a polygonal manner, and the number of sides of the cam shaft that cooperate with the cam sleeve is an integral multiple of the number of cylinders corresponding to the engine.
  • the number of sides of the cam shaft that cooperate with the cam sleeve is 3, or 6, or 9, or 12.
  • the automatic returning device is a spring, or an electromagnet, or a permanent magnet.
  • the invention has the beneficial effects that the guide groove provided by the cam sleeve is axially moved by the guide sleeve, and the guide groove does not need to be provided with the valve core ejection groove, and the solenoid valve spool is guided.
  • the slot can be returned to the initial position by the automatic returning device, and the cam guide groove and the solenoid valve are matched to realize the position adjustment of the camshaft, thereby changing the valve lift, which is not only simple in structure, good in reliability, and low in cost.
  • Fig. 1 is a schematic view showing the structure of a first embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a solenoid valve spool and a guide groove in Embodiment 1 of the present invention.
  • Figure 3 is a schematic view showing the structure of a cam sleeve in Embodiment 1 of the present invention.
  • Figure 4 is a cross-sectional view showing the integral cam sleeve in the first embodiment of the present invention.
  • Figure 5 is a cross-sectional view showing a combined cam sleeve in Embodiment 1 of the present invention.
  • Figure 6 is a schematic view showing the structure of a cam sleeve in Embodiment 2 of the present invention.
  • Figure 7 is a cross-sectional view showing a cam sleeve in a second embodiment of the present invention.
  • Figure 8 is a schematic view showing the structure of the mating face of the cam sleeve in the present invention.
  • Figure 9 is a schematic view showing the structure of a cam fitting surface in the present invention.
  • an adjustment mechanism for a camshaft of an internal combustion engine includes a camshaft 1, a cam sleeve 2, and a solenoid valve 3, and a guide boss 7 is disposed on the cam sleeve 2,
  • the spool of the solenoid valve 3 cooperates with the guiding boss 7 for driving the cam sleeve 2 to reciprocate axially along the camshaft 1, and the spool is provided with an automatic returning device connection when the solenoid valve spool is inserted
  • the cam sleeve moves along the axial direction of the cam shaft under the rotation of the cam shaft to adjust the cam position to realize the valve lift switching.
  • the cam sleeve and the cam sleeve are The camshaft is fixed by the limiting device, the solenoid valve 3 is de-energized, and the spool is returned to the initial position by the automatic returning device, and the ejector slot is not required to be disposed on the cam sleeve, and the guiding slot unit radius is set to be the same
  • the radius value has the same base circle, and the automatic return device may be a spring, an electromagnet suction, a permanent magnet suction, and the like.
  • valve core A12a and the valve core B12b of the solenoid valve 3 respectively cooperate with the side guide groove surface A7a and the guide groove surface B7b of the guide boss portion 7, and the guide groove may be a spiral groove
  • the valve core A12a and the valve core B12b may be connected to the spool returning mechanism A13a and the spool returning mechanism B13b, respectively;
  • the cam sleeve 2 is a unitary structure, and the cam sleeve 2 is The high cam 4 and the low cam 5 move axially with the cam sleeve 2 as a whole, and are axially restrained by the limit mechanism after being moved into position.
  • the cam sleeve 2 is of a combined structure including a high cam 4, a low cam 5, a sleeve 6 and a guide boss 7, the high cam 4, the low cam 5 and the guiding boss 7 is fixed to the sleeve 6 by riveting or interference pressing or other means, and moves axially along with the guiding boss 7, and is axially limited by the limiting mechanism after moving into position. Bit.
  • the working principle of the invention is: the solenoid valve is energized by the valve core A, and the cam sleeve is in contact with the valve core A under the rotation of the cam shaft, and the cam sleeve and the cam shaft are under the action of the valve core A.
  • the axial slip occurs.
  • the cam shaft enters the first slot A of the limiting device by the first slot B of the limiting device to perform the limit, and the switching between the low cam and the high cam is completed, and the electromagnetic valve is broken.
  • the spool A returns to the initial position under the action of the spool return mechanism A, and the cam position adjustment is completed.
  • the solenoid valve is energized, the spool B is extended, and the camshaft position is reversely adjusted.
  • the cam sleeve 2 is of a split type structure including a sleeve 6 in the middle, a high and low cam group disposed at both ends of the sleeve 6, and a guide boss at both ends of the cam sleeve 2.
  • the guiding protrusions 7 respectively cooperate with the valve core of the corresponding solenoid valve, the components of the cam sleeve 2 of the split structure are relatively abutted, and move axially along the cam shaft 1 under the action of the solenoid valve After being moved into position, the guiding protrusions 7 at both ends of the cam sleeve 2 are axially restricted by corresponding limiting mechanisms.
  • the working principle of the invention is: the solenoid valve is energized by the valve core A, and the cam sleeve is in contact with the valve core A under the rotation of the cam shaft, and the cam sleeve and the cam shaft are under the action of the valve core A.
  • the axial slip occurs.
  • the two slots A are limited, the high cam and the low cam are switched, the solenoid valve is de-energized, and the spool A automatically returns to the initial position under the action of the spool return mechanism A, and the cam position adjustment is completed.
  • the solenoid valve is energized, the spool B is extended, and the camshaft position is reversely adjusted.
  • the cam shaft 1 and the cam sleeve 2 are matched in a polygonal manner, and a sleeve fitting surface 10 is provided on the inner surface of the cam sleeve 2, on the outer surface of the cam shaft 1
  • the cam mating surface 11 is provided, and the number of sides of the cam shaft 1 and the cam sleeve 2 is an integral multiple of the number of cylinders corresponding to the engine cylinder.
  • the number of mating sides of the camshaft and the cam sleeve of the three-cylinder machine may be 3, 6, and 9. , 12, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

一种用于内燃机凸轮轴的调整机构，包括凸轮轴(1)、凸轮套筒(2)以及电磁阀(3)，在凸轮套筒(2)上设置有引导凸起部(7)，电磁阀(3)的阀芯与引导凸起部(7)配合，用于驱动凸轮套筒(2)沿凸轮轴(1)轴向往复移动，阀芯设有自动回位装置，在电磁阀(3)断电后，阀芯在自动回位装置作用下回到初始位置。

Description

一种用于内燃机凸轮轴的调整机构 技术领域
本发明涉及凸轮轴调整机构设计领域，尤其是涉及一种用于内燃机凸轮轴的调整机构。
背景技术
随着汽车行业的发展和石油资源的紧缺，油价不断地攀升和日益严格的环保标准出台，改善发动机的油耗、环保性能显得更为紧迫，各汽车厂家纷纷把目光投向可变气门升程技术来改善发动机性能。
目前主流的可变气门升程技术均是采用凸轮移位的方式，但是，目前的凸轮移位方式，凸轮套筒为整体式的螺旋槽结构，且螺旋槽在圆周上半径不一致，螺旋槽设置有推回电磁阀阀芯的斜坡，电磁阀不具备凸轮切换到位后自动收回功能。这种结构会加速阀芯的磨损，且凸轮轴加工难度大，尺寸不易保证，会大量增加凸轮轴套筒的制造成本。
发明内容
本发明要解决的技术问题是：针对现有技术存在的问题，提供一种结构简单、可靠性高、制造成本低、且在凸轮套筒上无需设置阀芯顶出结构的用于内燃机凸轮轴的调整机构。
本发明要解决的技术问题采用以下技术方案来实现：一种用于内燃机凸轮轴的调整机构，包括凸轮轴、凸轮套筒以及电磁阀，所述凸轮套筒上设置有引导凸起部，所述电磁阀的阀芯与引导凸起部配合，用于驱动凸轮套筒沿凸轮轴轴向往复移动，所述阀芯设有自动回位装置连接，在电磁阀断电后，所述阀芯在自动回位装置作用下回到初始位置。
优选地，所述电磁阀的阀芯A和阀芯B分别与引导凸起部的侧面引导槽面A和引导槽面B对应配合，所述阀芯A和阀芯B分别与阀芯回位机构A和阀芯回位机构B连接。
优选地，所述凸轮套筒为整体式结构，所述凸轮套筒上的高凸轮和低凸轮随凸轮套筒整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
优选地，所述凸轮套筒为组合式结构，包括高凸轮、低凸轮、套筒和引导凸起部， 所述高凸轮、低凸轮和引导凸起部通过铆接或过盈压装的方式固定在套筒上，并随着引导凸起部整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
优选地，所述凸轮套筒为分体式结构，包括中部的套筒、设置在套筒两端部的高低凸轮组以及位于凸轮套筒两端的引导凸起部，所述引导凸起部分别与对应电磁阀的阀芯配合，所述分体式结构的凸轮套筒中各部件相对抵靠，且在电磁阀作用下整体沿凸轮轴轴向移动，并在移动到位后，所述凸轮套筒两端的引导凸起部分别通过对应的限位机构进行轴向限位。
优选地，所述凸轮轴与凸轮套筒采用多边形方式进行配合，所述凸轮轴与凸轮套筒配合的边数为对应发动机缸数的整数倍。
优选地，所述凸轮轴与凸轮套筒配合的边数为3，或者为6，或者为9，或者为12。
优选地，所述的自动回位装置是弹簧，或者是电磁铁，或者是永磁铁。
与现有技术相比，本发明的有益效果是：通过凸轮套筒上设置的引导凸轮套筒轴向移动的引导槽，该引导槽不需要设置阀芯顶出槽，电磁阀阀芯通过引导槽后能够在自动回位装置作用下回到初始位置，通过凸轮引导槽与电磁阀的配合，实现凸轮轴的位置调整，从而改变气门升程，不仅结构简单、可靠性好，而且成本低廉。
附图说明
图1是本发明实施例1的结构示意图。
图2是本发明实施例1中电磁阀阀芯与引导槽配合的结构示意图。
图3是本发明实施例1中凸轮套筒的结构示意图。
图4是本发明实施例1中整体式凸轮套筒的剖视图。
图5是本发明实施例1中组合式凸轮套筒的剖视图。
图6是本发明实施例2中凸轮套筒的结构示意图。
图7是本发明实施例2中凸轮套筒的剖视图。
图8是本发明中凸轮套筒配合面的结构示意图。
图9是本发明中凸轮配合面的结构示意图。
图中标记：1-凸轮轴，2-凸轮套筒，3-电磁阀，4-高凸轮，5-低凸轮，6-套筒，7-引导凸起部，7a-引导槽面A，7b-引导槽面B，8a-限位装置第一槽A，8b-限位装置第一槽B，9a-限位装置第二槽A，9b-限位装置第二槽B，10-套筒配合面，11-凸轮配合面，12a-阀芯A，12b-阀芯B，13a-阀芯回位机构A，13b-阀芯回位机构B。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图和具体实施例对本发明进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例1
如图1-4所示，一种用于内燃机凸轮轴的调整机构，包括凸轮轴1、凸轮套筒2以及电磁阀3，在所述凸轮套筒2上设置有引导凸起部7，所述电磁阀3的阀芯与引导凸起部7配合，用于驱动凸轮套筒2沿凸轮轴1轴向往复移动，所述阀芯设有自动回位装置连接，当电磁阀阀芯伸入凸轮套筒引导槽内时，在凸轮轴旋转作用下，凸轮套筒沿着凸轮轴轴向方向移动，来调整凸轮位置，实现气门升程切换，当阀芯通过引导槽后，凸轮套筒与凸轮轴通过限位装置固定，电磁阀3断电，所述阀芯在自动回位装置作用下回到初始位置，而不需要凸轮套筒上设置顶出槽，该引导槽单元半径设置为相同的半径值，具有相同的基圆，所述自动回位装置可以是弹簧、电磁铁吸力、永磁铁吸力等其他回位方式。
在本实施例中，所述电磁阀3的阀芯A12a和阀芯B12b分别与引导凸起部7的侧面引导槽面A7a和引导槽面B7b对应配合，所述引导槽可以是螺旋槽，也可以是斜面形，所述阀芯A12a和阀芯B12b分别与阀芯回位机构A13a和阀芯回位机构B13b连接；所述凸轮套筒2为整体式结构，所述凸轮套筒2上的高凸轮4和低凸轮5随凸轮套筒2整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
如图5所示，作为另一种结构，所述凸轮套筒2为组合式结构，包括高凸轮4、低凸轮5、套筒6和引导凸起部7，所述高凸轮4、低凸轮5和引导凸起部7通过铆接或过盈压装或其他方式固定在套筒6上，并随着引导凸起部7整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
本发明的工作原理是：电磁阀通电阀芯A伸出，凸轮套筒在凸轮轴的旋转作用下，引导槽面A与阀芯A接触，在阀芯A的作用下凸轮套筒与凸轮轴产生轴向滑移，当引导槽面A通过阀芯A，凸轮轴由限位装置第一槽B进入到限位装置第一槽A进行限位，低凸轮与高凸轮切换完成，电磁阀断电，阀芯A在阀芯回位机构A作用下回到初始位置，凸轮位置调整完成。同理电磁阀通电，阀芯B伸出，凸轮轴位置进行反向调整。
实施例2
如图6和7所示，所述凸轮套筒2为分体式结构，包括中部的套筒6、设置在套筒6两端部的高低凸轮组以及位于凸轮套筒2两端的引导凸起部7，所述引导凸起部7 分别与对应电磁阀的阀芯配合，所述分体式结构的凸轮套筒2中各部件相对抵靠，且在电磁阀作用下整体沿凸轮轴1轴向移动，并在移动到位后，所述凸轮套筒2两端的引导凸起部7分别通过对应的限位机构进行轴向限位。
本发明的工作原理是：电磁阀通电阀芯A伸出，凸轮套筒在凸轮轴的旋转作用下，引导槽面A与阀芯A接触，在阀芯A的作用下凸轮套筒与凸轮轴产生轴向滑移，当引导槽面A通过阀芯A，凸轮轴限位装置第一槽B进入到限位装置第一槽A，凸轮轴限位装置第二槽B进入到限位装置第二槽A进行限位，高凸轮与低凸轮切换完成，电磁阀断电，阀芯A在阀芯回位机构A作用下自动回到初始位置，凸轮位置调整完成。同理电磁阀通电，阀芯B伸出，凸轮轴位置进行反向调整。
如图8和9所示，所述凸轮轴1与凸轮套筒2采用多边形方式进行配合，在所述凸轮套筒2内孔面设置有套筒配合面10，在所述凸轮轴1外表面设置有凸轮配合面11，所述凸轮轴1与凸轮套筒2配合的边数为对应发动机缸数的整数倍，如三缸机凸轮轴与凸轮套筒配合边数可以是3、6、9、12等。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，应当指出的是，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (8)

  1. 一种用于内燃机凸轮轴的调整机构，包括凸轮轴(1)、凸轮套筒(2)以及电磁阀(3)，其特征在于：在所述凸轮套筒(2)上设置有引导凸起部(7)，所述电磁阀(3)的阀芯与引导凸起部(7)配合，用于驱动凸轮套筒(2)沿凸轮轴(1)轴向往复移动，所述阀芯设有自动回位装置，在电磁阀(3)断电后，所述阀芯在自动回位装置作用下回到初始位置。
  2. 根据权利要求1所述的用于内燃机凸轮轴的调整机构，其特征在于：所述电磁阀(3)的阀芯A(12a)和阀芯B(12b)分别与引导凸起部(7)的侧面引导槽面A(7a)和引导槽面B(7b)对应配合，所述阀芯A(12a)和阀芯B(12b)分别与阀芯回位机构A(13a)和阀芯回位机构B(13b)连接。
  3. 根据权利要求2所述的用于内燃机凸轮轴的调整机构，其特征在于：所述凸轮套筒(2)为整体式结构，所述凸轮套筒(2)上的高凸轮(4)和低凸轮(5)随凸轮套筒(2)整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
  4. 根据权利要求2所述的用于内燃机凸轮轴的调整机构，其特征在于：所述凸轮套筒(2)为组合式结构，包括高凸轮(4)、低凸轮(5)、套筒(6)和引导凸起部(7)，所述高凸轮(4)、低凸轮(5)和引导凸起部(7)通过铆接或过盈压装的方式固定在套筒(6)上，并随着引导凸起部(7)整体轴向移动，且在移动到位后通过限位机构进行轴向限位。
  5. 根据权利要求2所述的用于内燃机凸轮轴的调整机构，其特征在于：所述凸轮套筒(2)为分体式结构，包括中部的套筒(6)、设置在套筒(6)两端部的高低凸轮组以及位于凸轮套筒(2)两端的引导凸起部(7)，所述引导凸起部(7)分别与对应电磁阀的阀芯配合，所述分体式结构的凸轮套筒(2)中各部件相对抵靠，且在电磁阀作用下整体沿凸轮轴(1)轴向移动，并在移动到位后，所述凸轮套筒(2)两端的引导凸起部(7)分别通过对应的限位机构进行轴向限位。
  6. 根据权利要求1至5中任意一项所述的用于内燃机凸轮轴的调整机构，其特征在于：所述凸轮轴(1)与凸轮套筒(2)采用多边形方式进行配合，所述凸轮轴(1)与凸轮套筒(2)配合的边数为对应发动机缸数的整数倍。
  7. 根据权利要求6所述的用于内燃机凸轮轴的调整机构，其特征在于：所述凸轮轴(1)与凸轮套筒(2)配合的边数为3，或者为6，或者为9，或者为12。
  8. 根据权利要求1至5中任意一项所述的用于内燃机凸轮轴的调整机构，其特征在于：所述的自动回位装置是弹簧，或者是电磁铁，或者是永磁铁。
PCT/CN2018/123443 2018-03-22 2018-12-25 一种用于内燃机凸轮轴的调整机构 WO2019179191A1 (zh)

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