WO2023141898A1 - 凸轮相位调节器 - Google Patents

凸轮相位调节器 Download PDF

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Publication number
WO2023141898A1
WO2023141898A1 PCT/CN2022/074422 CN2022074422W WO2023141898A1 WO 2023141898 A1 WO2023141898 A1 WO 2023141898A1 CN 2022074422 W CN2022074422 W CN 2022074422W WO 2023141898 A1 WO2023141898 A1 WO 2023141898A1
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Prior art keywords
grooves
stator
phase adjuster
cam phase
sprocket
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PCT/CN2022/074422
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English (en)
French (fr)
Inventor
李欣
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舍弗勒技术股份两合公司
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Application filed by 舍弗勒技术股份两合公司 filed Critical 舍弗勒技术股份两合公司
Priority to CN202280075434.0A priority Critical patent/CN118284738A/zh
Priority to PCT/CN2022/074422 priority patent/WO2023141898A1/zh
Publication of WO2023141898A1 publication Critical patent/WO2023141898A1/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
    • 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

Definitions

  • the invention relates to the technical field of vehicles.
  • the present invention relates to a cam phase adjuster.
  • variable valve timing Variable Valve Timing
  • the cam phase adjuster uses hydraulic fluid to drive the rotor to rotate relative to the stator, thereby adjusting the phase of the camshaft.
  • the stator is usually integrated with the sprocket and is used to engage the chain. As the sprocket is running, the chain is constantly contacting and colliding with the sprocket and stator, causing problems such as wear and noise.
  • a buffer washer can usually be provided on the stator to reduce the noise generated when the chain contacts the stator or the sprocket.
  • the buffer washer is adhesively bonded to the outer surface of the stator, and the bonding surface of the stator is usually a smooth surface. Since the adhesive has high requirements on the surface roughness of the bonding area, it is necessary to use a sandblasting process to increase the surface roughness of the bonding surface to ensure the bonding quality. After sandblasting, it is also necessary to increase the cleaning process to remove sandblasting residues to ensure the bonding quality. Sandblasting and additional cleaning processes add to the production costs of the cam phasers.
  • the technical problem to be solved by the present invention is to provide a cam phase adjuster that is easy to produce and has low manufacturing cost.
  • the above-mentioned technical problem is solved by a cam phase adjuster according to the invention.
  • the cam phase adjuster includes a stator, a sprocket and a buffer washer, the sprocket radially protrudes from the outer surface of the stator, and the buffer washer surrounds the outer surface of the stator.
  • the stator and/or the sprocket include a groove feature area formed on the surface, and a plurality of grooves extending obliquely with respect to the circumferential direction are formed in the groove feature area, and the buffer washer is bonded on the groove feature area.
  • the grooves in the grooved feature area can increase the surface roughness in this area and improve the bond strength between the bumper washer and the stator bonding surface, so it can replace the surface formed by sandblasting.
  • the grooves extend obliquely with respect to the circumferential direction so that the bonding surfaces have a higher resistance to relative movement in the tangential direction.
  • the grooves in the groove feature region can be formed by simple processes such as machining or integral molding, so that the manufacturing process can be simplified and the manufacturing cost can be reduced.
  • a groove feature may be formed on the radially outer surface of the stator axially adjacent to the sprocket.
  • the radially outer surface of the stator is the main surface where the bumper gasket is bonded.
  • groove features may alternatively or additionally be formed on a side surface of the sprocket extending perpendicularly to the axial direction and axially adjacent to the stator, against which the buffer washer may axially abut.
  • the above-mentioned plurality of grooves may respectively extend along the axial direction.
  • the groove extending in the axial direction is easy to process, and has higher resistance to relative movement in the tangential direction, thereby improving the bonding firmness between the buffer washer and the outer surface of the stator.
  • the above-mentioned plurality of grooves may be evenly spaced along the circumferential direction. This results in a uniform bonding effect over the entire circumference of the annular groove feature.
  • the groove feature may have a saw-tooth profile in a cross-section perpendicular to the axial direction. That is, the grooves have a triangular profile in cross-section and adjoin each other in the circumferential direction. This can effectively increase the density of grooves, so that higher surface roughness can be obtained in the groove feature area.
  • the above-mentioned plurality of grooves can be integrally formed with the stator by powder metallurgy process.
  • the grooves With the grooves extending in the axial direction, the entire product is easy to demould and thus easy to manufacture using powder metallurgy.
  • the groove feature area can be formed at one time, which greatly simplifies the processing technology.
  • the above-mentioned plurality of grooves may extend parallel to each other. Such grooves are easier to manufacture.
  • the plurality of grooves may also include a plurality of first grooves extending in parallel and a plurality of second grooves extending in parallel, and the extending directions of the plurality of first grooves and the plurality of second grooves are not parallel. This allows the grooved features to form a grid-like pattern.
  • the plurality of first grooves may be uniformly distributed along the circumferential direction, and/or the plurality of second grooves may be uniformly distributed along the circumferential direction.
  • the plurality of grooves can be formed by turning or knurling. More complex groove patterns can also be easily achieved using turning or knurling processes.
  • Figures 1a and 1b show a perspective view and details, respectively, of a cam phase adjuster according to an exemplary embodiment of the present invention.
  • FIGS. 2a and 2b show a perspective view of a cam phase adjuster and details thereof, respectively, according to an exemplary embodiment of the present invention.
  • a cam phase adjuster for a motor vehicle is provided.
  • the cam phaser is installed in a timing system of a motor vehicle.
  • Fig. 1a shows a perspective view of a cam phase adjuster according to an exemplary embodiment of the present invention.
  • the cam phase adjuster includes a stator 10 and a sprocket 20 .
  • the stator 10 is formed substantially in a hollow cylindrical shape.
  • the sprocket 20 is fixed on the radially outer side of the stator 10 and protrudes radially from the outer surface of the stator 10 .
  • the sprocket 20 has a plurality of teeth evenly spaced circumferentially for engaging a chain (not shown).
  • the sprocket 20 is preferably integrally formed with the stator 10 . However, the sprocket 20 can also be fixed on the stator 10 by other means such as welding.
  • the cam phaser also includes a buffer washer 30 .
  • the buffer washer 30 is an annular part made of rubber or other elastic materials.
  • the buffer washer 30 surrounds the outer surface of the stator 10 and is bonded to the outer surface of the stator 10 by adhesive.
  • the cushion washer 30 is axially adjacent to the sprocket 20 . When the chain is engaged with the sprocket 20 , the chain abuts generally radially against the bumper washer 30 .
  • the buffer washer 30 can buffer the vibration of the chain and reduce wear. Although only one buffer washer 30 is shown in FIG. 1a, two buffer washers 30 respectively located on both axial sides of the sprocket 20 may be provided on the same stator 10.
  • FIG. 2 a shows a perspective view of the cam phase adjuster with the buffer washer 30 removed.
  • the groove feature 11 is an annular region extending circumferentially around the outer surface of the stator 10 and axially adjacent to the sprocket 20 .
  • two groove feature areas 11 can also be formed on both axial sides of the sprocket 20; If one axial side of the sprocket 20 is provided with a buffer washer 30 , then only the groove feature area 11 needs to be formed on the corresponding axial side of the sprocket 20 .
  • Figure 2b shows a detail of the trench feature 11 in Figure 2a.
  • a plurality of grooves extending on the outer surface of the stator 10 are formed in the groove feature area 11 .
  • these grooves are all formed as grooves extending in the axial direction.
  • the shape and size of each groove in a cross-section perpendicular to the axial direction remain constant in the axial direction, thereby facilitating demolding.
  • the stator 10 can thus preferably be produced using a powder metallurgy process, and the grooved features 11 on the outer side are formed in one go during this process.
  • the sprocket 20 is integrally formed with the stator 10, the sprocket 20 is also formed at one time in the process. This makes the overall process of the cam phaser fairly simple.
  • such grooves can also be subsequently formed by machining methods such as turning or knurling.
  • each of these grooves may have the same profile in a cross-section perpendicular to the axial direction. Since the contact portion of the chain with the sprocket 20 and the groove feature area 11 will change with the rotation position, the above design is beneficial to make the buffer washer 30 have a uniform adhesive firmness in the entire circumferential direction.
  • each groove may have a triangular profile in a cross section perpendicular to the axial direction, and these grooves may be adjacent to each other along the circumferential direction. This makes the trench feature 11 have a saw-tooth profile in a cross-section perpendicular to the axial direction. This design can effectively increase the density of the grooves and increase the overall roughness of the groove feature area, thereby obtaining greater bonding firmness.
  • the grooves in the grooved feature region 11 may not extend in the axial direction, but extend obliquely with respect to the axial direction. But these grooves cannot extend in the circumferential direction, that is to say must be inclined with respect to the circumferential direction (extending axially means perpendicular to the circumferential direction, that is to say inclined at 90 degrees with respect to the circumferential direction). As long as the extending direction of the groove is not parallel to the circumferential direction, the shape of the groove can produce effective tangential resistance to the buffer washer 30 bonded on the surface, preventing the buffer washer 30 from sliding along the circumferential direction.
  • the grooves do not extend parallel to the axial direction, there are various ways of arranging the grooves.
  • all grooves may run parallel to each other.
  • the grooves may preferably be evenly spaced in the circumferential direction.
  • all the grooves can be divided into two groups with different extension directions, wherein one group of grooves is a plurality of first grooves extending in parallel along the first direction, and the other group is a plurality of first grooves extending in parallel along the second direction.
  • a plurality of second grooves extending in parallel are directions inclined with respect to the circumferential direction but not parallel to the axial direction.
  • the first direction is not parallel to the second direction, so that the first groove and the second groove can intersect on the outer surface, thereby forming a grid pattern.
  • these first grooves may be evenly spaced along the circumferential direction.
  • these second grooves may also be evenly spaced along the circumferential direction.
  • the grid-like groove pattern can effectively improve the surface roughness of the groove feature region 11 and increase the adhesive force.
  • a groove feature region 11 can be formed on the manufactured blank of the stator 10 by machining such as turning or knurling. These machining processes are mature in technology, easy to use, and still cost-effective.
  • the groove feature area may alternatively or additionally be formed on the side surface of the sprocket 20 extending perpendicular to the axial direction and adjacent to the stator 10 in the axial direction, and the buffer washer 30 may be formed in the axial direction abuts and adheres to the side surface.
  • the buffer washer is arranged on the groove feature area, the structure of the groove feature area is simple, and the manufacture is convenient, not only can obtain better bonding firmness, but also is easy to manufacture, thereby improving the cost-effectiveness .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gears, Cams (AREA)

Abstract

一种凸轮相位调节器，包括定子（10）、链轮（20）和缓冲垫圈（30），链轮（20）从定子（10）的外侧面沿径向突起，缓冲垫圈（30）环绕在定子（10）的外侧面上。定子（10）和/或链轮（20）包括形成在表面上的沟槽特征区（11），在沟槽特征区（11）中形成有关于周向倾斜延伸的多个沟槽，缓冲垫圈（30）粘接在沟槽特征区（11）上。本申请中的凸轮相位调节器易于生产且制造成本低。

Description

凸轮相位调节器 技术领域
本发明涉及车辆技术领域。具体地，本发明涉及一种凸轮相位调节器。
背景技术
为了获得内燃机的最佳燃烧效率，通常需要随着发动机的运行状态而改变燃烧室中的进气量，于是出现了可变气门正时(Variable Valve Timing，VVT)技术。实现可变气门正时的主要部件是凸轮相位调节器。凸轮相位调节器通过液压流体来驱动转子相对于定子转动，从而调节凸轮轴的相位。定子通常与链轮集成在一起，用于接合链条。在链轮运转时，链条持续地接触和碰撞链轮和定子，从而造成磨损和噪声等问题。
在现有技术中，通常可以在定子上设置缓冲垫圈来减少链条与定子或链轮接触时发出的噪音。在现有技术中，缓冲垫圈以胶黏的方式粘接到定子的外侧面上，而定子的粘接表面通常是光滑的表面。由于胶黏对粘接区域表面粗糙度要求较高，因此需要采用喷砂工艺来提高粘接表面的表面粗糙度，以确保粘接质量。在喷砂之后，还需要增加清洗工艺来清除喷砂残留物，以确保粘接质量。喷砂和额外的清洁工艺增加了凸轮相位调节器的生产成本。
发明内容
因此，本发明需要解决的技术问题是，提供一种易于生产且低制造成本的凸轮相位调节器。
上述技术问题通过根据本发明的一种凸轮相位调节器而得到解决。该凸轮相位调节器包括定子、链轮和缓冲垫圈，链轮从定子的外侧面沿径向突起，缓冲垫圈环绕在定子的外侧面上。其中，定子和/或链轮包括形成在表面上的沟槽特征区，在沟槽特征区中形成有关于周向倾斜延伸的多个沟 槽，缓冲垫圈粘接在沟槽特征区上。沟槽特征区中的沟槽可以增加该区域的表面粗糙度，提高缓冲垫圈与定子粘接表面之间的粘接牢固度，因此可以替代喷砂形成的表面。沟槽关于周向倾斜延伸使得粘接表面对于沿切向的相对运动具有较高的阻力。同时，沟槽特征区中的沟槽可以通过机加工或一体成型等简单的工艺来形成，从而可以简化制造工艺，降低制造成本。
根据本发明的一个优选实施例，沟槽特征区可以形成在定子的径向外侧表面上并且与链轮沿轴向相邻。定子的径向外侧表面是粘结缓冲垫圈的主要表面。此外，沟槽特征区也可以替代地或者另外地形成在链轮的垂直于轴向延伸并且与定子沿轴向相邻的侧表面上，缓冲垫圈可以沿轴向抵接该侧表面。
根据本发明的另一优选实施例，上述多个沟槽可以分别沿轴向延伸。沿轴向延伸的沟槽易于加工，并且对于沿切向的相对运动具有更高的阻力，从而可以提高缓冲垫圈与定子外侧面之间的粘接牢固度。优选地，上述多个沟槽可以沿周向均匀地间隔分布。这使得环形的沟槽特征区在整个周向上具有均一的粘接效果。
根据本发明的另一优选实施例，沟槽特征区可以在垂直于轴向的横截面中具有锯齿状轮廓。也就是说，这些沟槽的横截面具有三角形轮廓，并且彼此沿周向邻接。这可以有效提高沟槽的密度，使得沟槽特征区可以获得较高的表面粗糙度。
根据本发明的另一优选实施例，上述多个沟槽可以通过粉末冶金工艺与定子一体形成。在沟槽沿轴向延伸的情况下，整个产品易于脱模，因此便于利用粉末冶金工艺来制造。使用粉末冶金工艺制造定子，可以一次性地形成沟槽特征区，从而大大简化加工工艺。
根据本发明的另一优选实施例，上述多个沟槽可以相互平行地延伸。这种沟槽更易于制造。替代地，上述多个沟槽也可以包括平行延伸的多个第一沟槽和平行延伸的多个第二沟槽，多个第一沟槽与多个第二沟槽的延伸方向不平行。这使得沟槽特征区可以形成网格状的图案。优选地，多个第一沟槽可以沿周向均匀地间隔分布，和/或，多个第二沟槽可以沿周向均匀地间隔分布。
根据本发明的另一优选实施例，上述多个沟槽可以通过车削或滚花工艺形成。采用车削或滚花工艺也便于实现更复杂的沟槽图案。
附图说明
以下结合附图进一步描述本发明。图中以相同的附图标记来代表功能相同的元件。其中：
图1a和图1b分别示出根据本发明的示例性实施例的凸轮相位调节器的立体图及细节；和
图2a和图2b分别示出根据本发明的示例性实施例的凸轮相位调节器的立体图及其细节。
具体实施方式
以下将结合附图描述根据本发明的凸轮相位调节器的具体实施方式。下面的详细描述和附图用于示例性地说明本发明的原理，本发明不限于所描述的优选实施例，本发明的保护范围由权利要求书限定。
根据本发明的实施例，提供了一种用于机动车辆的凸轮相位调节器。该凸轮相位调节器安装在机动车辆的正时系统中。
图1a示出了根据本发明的示例性实施例的凸轮相位调节器的立体图。如图1a所示，该凸轮相位调节器包括定子10和链轮20。定子10大致形成为中空圆柱形。链轮20固定在定子10的径向外侧，并且从定子10外侧面沿径向突起。链轮20具有沿周向均匀地间隔分布的多个齿，用于接合链条(未示出)。链轮20与定子10优选地一体形成。但链轮20也可以通过焊接等其他方式固定在定子10上。
该凸轮相位调节器还包括缓冲垫圈30。缓冲垫圈30是由橡胶或其他弹性材料制成的环形部件。缓冲垫圈30环绕在定子10的外侧面上，并且通过粘合剂粘接在定子10的外侧面上。缓冲垫圈30在轴向上与链轮20相邻。当链条与链轮20接合时，链条大致沿径向抵接在缓冲垫圈30上。缓冲垫圈30可以缓冲链条的振动并且降低磨损。虽然图1a中仅示出了一个缓冲垫圈30，但是在同一个定子10上可以设置有分别位于链轮20的轴向 两侧的两个缓冲垫圈30。
如图1b所示，为了提高缓冲垫圈30与定子10的外侧面之间的粘接牢固度，在定子10的外侧面上形成有沟槽特征区11，缓冲垫圈30粘接在沟槽特征区11上。图2a示出了去除缓冲垫圈30后的凸轮相位调节器的立体图。如图2a所示，沟槽特征区11是围绕定子10的外侧面沿周向延伸的环形区域，并且与链轮20沿轴向相邻。当凸轮相位调节器在链轮20的轴向两侧都设置有缓冲垫圈30时，在链轮20的轴向两侧也可以分别形成两个沟槽特征区11；如果凸轮相位调节器仅在链轮20的轴向一侧设置有缓冲垫圈30，则只需要在链轮20的相应的轴向一侧形成沟槽特征区11。
图2b示出了图2a中的沟槽特征区11的细节。如图2b所示，沟槽特征区11中形成有在定子10的外侧面上延伸的多条沟槽。在本实施例中，这些沟槽都形成为沿轴向延伸的沟槽。每个沟槽在垂直于轴向的横截面中的形状和尺寸在轴向上保持恒定，从而便于脱模。由此优选地可以使用粉末冶金工艺来制造定子10，并且在该过程中一次性地形成外侧面上的沟槽特征区11。此外，当链轮20与定子10一体形成时，链轮20也在该过程中一次性地形成。这使得凸轮相位调节器的整体工艺相当简单。当然，这种沟槽也可以通过车削或滚花等机加工方式来后续形成。
优选地，上述的沟槽可以沿周向均匀地间隔分布。此外，这些沟槽中的每一个都可以在垂直于轴向的横截面中具有相同的轮廓。由于链条与链轮20及沟槽特征区11的接触部分会随着转动位置而变化，因此上述设计有利于使缓冲垫圈30在整个周向上具有均一的粘接牢固度。进一步优选地，每个沟槽可以在垂直于轴向的横截面中具有三角形的轮廓，并且这些沟槽可以沿周向相互邻接在一起。这使得沟槽特征区11在垂直于轴向的横截面中具有锯齿状的轮廓。这种设计可以有效提高沟槽的密度，增加沟槽特征区的整体粗糙度，从而获得更大的粘接牢固度。
在替代的实施例中，沟槽特征区11中的沟槽也可以不沿轴向延伸，而是关于轴向倾斜延伸。但是这些沟槽不能沿周向延伸，也就是说必须关于周向倾斜(沿轴向延伸意味着垂直于周向，也就是说关于周向倾斜90度)。只要沟槽的延伸方向不平行于周向，沟槽的形状就可以对粘接在该表面上 的缓冲垫圈30产生有效的切向阻力，防止缓冲垫圈30沿周向滑动。
当沟槽不平行于轴向方向延伸时，有多种方式来布置这些沟槽。例如，在第一种情况下，所有沟槽可以相互平行地延伸。在这种情况下，这些沟槽优选地可以沿周向均匀地间隔分布。
在第二种情况下，所有的沟槽可以分为延伸方向不同的两组，其中一组沟槽是沿第一方向平行地延伸的多个第一沟槽，另一组是沿第二方向平行地延伸的多个第二沟槽。如上所述，第一方向与第二方向都是关于周向倾斜但不平行于轴向的方向。第一方向与第二方向不平行，使得第一沟槽与第二沟槽能够在外侧面上相交，从而构成网格状的图案。优选地，这些第一沟槽可以沿周向均匀地间隔分布。类似地，这些第二沟槽也可以沿周向均匀地间隔分布。网格状的沟槽图案能够有效提高沟槽特征区11的表面粗糙度，增加粘接力。
在上述的替代实施例中，由于沟槽的延伸方向不平行于轴向，不利于脱模，因此不便于使用粉末冶金工艺来制造。但是，可以在制造好的的定子10的坯件上通过车削或滚花等机加工方式来形成这种沟槽特征区11。这些机加工工艺的技术成熟，使用方便，仍然具有较好的成本效益。
在另外的实施例中，沟槽特征区也可以替代地或者附加地形成在链轮20的垂直于轴向延伸并且与定子10沿轴向相邻的侧表面上，缓冲垫圈30可以沿轴向抵接并且粘接在该侧表面上。
根据本发明的凸轮相位调节器将缓冲垫圈设置在沟槽特征区上，沟槽特征区的结构简单，制造方便，不仅可以获得较好的粘接牢固度，而且便于制造，从而提高了成本效益。
虽然在上述说明中示例性地描述了可能的实施例，但是应当理解到，仍然通过所有已知的和此外技术人员容易想到的技术特征和实施方式的组合存在大量实施例的变化。此外还应该理解到，示例性的实施方式仅仅作为一个例子，这种实施例绝不以任何形式限制本发明的保护范围、应用和构造。通过前述说明更多地是向技术人员提供一种用于转化至少一个示例性实施方式的技术指导，其中，只要不脱离权利要求书的保护范围，便可以进行各种改变，尤其是关于所述部件的功能和结构方面的改变。
附图标记表
10  定子
11  沟槽特征区
20  链轮
30  缓冲垫圈

Claims (10)

  1. 一种凸轮相位调节器，包括定子(10)、链轮(20)和缓冲垫圈(30)，所述链轮(20)从所述定子(10)的外侧面沿径向突起，所述缓冲垫圈(30)环绕在所述定子(10)的外侧面上，
    其特征在于，
    所述定子(10)和/或所述链轮(20)包括形成在表面上的沟槽特征区(11)，在所述沟槽特征区(11)中形成有关于周向倾斜延伸的多个沟槽，所述缓冲垫圈(30)粘接在所述沟槽特征区(11)上。
  2. 根据权利要求1所述的凸轮相位调节器，其特征在于，所述沟槽特征区(11)形成在所述定子(10)的径向外侧表面上并且与所述链轮(20)沿轴向相邻。
  3. 根据权利要求2所述的凸轮相位调节器，其特征在于，所述多个沟槽分别沿轴向延伸。
  4. 根据权利要求3所述的凸轮相位调节器，其特征在于，所述多个沟槽沿周向均匀地间隔分布。
  5. 根据权利要求4所述的凸轮相位调节器，其特征在于，所述沟槽特征区(11)在垂直于轴向的横截面中具有锯齿状轮廓。
  6. 根据权利要求3至5中任一项所述的凸轮相位调节器，其特征在于，所述多个沟槽通过粉末冶金工艺与所述定子(10)一体形成。
  7. 根据权利要求2所述的凸轮相位调节器，其特征在于，所述多个沟槽相互平行地延伸。
  8. 根据权利要求2所述的凸轮相位调节器，其特征在于，所述多个沟槽包括平行延伸的多个第一沟槽和平行延伸的多个第二沟槽，所述多个第一沟槽与所述多个第二沟槽的延伸方向不平行。
  9. 根据权利要求8所述的凸轮相位调节器，其特征在于，所述多个第一沟槽沿周向均匀地间隔分布，和/或，所述多个第二沟槽沿周向均匀地间隔分布。
  10. 根据权利要求7至9中任一项所述的凸轮相位调节器，其特征在于， 所述多个沟槽通过车削或滚花工艺形成。
PCT/CN2022/074422 2022-01-27 2022-01-27 凸轮相位调节器 WO2023141898A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080011255A1 (en) * 2006-07-12 2008-01-17 Hitachi, Ltd. Variable valve timing control apparatus of internal combustion engine
CN102089501A (zh) * 2008-07-07 2011-06-08 谢夫勒科技有限两合公司 凸轮轴调节器
CN103867246A (zh) * 2012-12-18 2014-06-18 日立汽车系统株式会社 内燃机的阀门正时控制装置
CN105980670A (zh) * 2014-01-30 2016-09-28 舍弗勒技术股份两合公司 凸轮轴调节器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080011255A1 (en) * 2006-07-12 2008-01-17 Hitachi, Ltd. Variable valve timing control apparatus of internal combustion engine
CN102089501A (zh) * 2008-07-07 2011-06-08 谢夫勒科技有限两合公司 凸轮轴调节器
CN103867246A (zh) * 2012-12-18 2014-06-18 日立汽车系统株式会社 内燃机的阀门正时控制装置
CN105980670A (zh) * 2014-01-30 2016-09-28 舍弗勒技术股份两合公司 凸轮轴调节器

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