WO2009152746A1 - 一种内燃机可变气门升程装置 - Google Patents

一种内燃机可变气门升程装置 Download PDF

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Publication number
WO2009152746A1
WO2009152746A1 PCT/CN2009/072252 CN2009072252W WO2009152746A1 WO 2009152746 A1 WO2009152746 A1 WO 2009152746A1 CN 2009072252 W CN2009072252 W CN 2009072252W WO 2009152746 A1 WO2009152746 A1 WO 2009152746A1
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WIPO (PCT)
Prior art keywords
rocker
rocker arm
pin
roller
internal combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2009/072252
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English (en)
French (fr)
Inventor
熊志江
赵辉
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to EP09765385A priority Critical patent/EP2309101B1/en
Priority to US12/997,971 priority patent/US8701608B2/en
Publication of WO2009152746A1 publication Critical patent/WO2009152746A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—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 rocker arm ratio
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2820/032—Electric motors

Definitions

  • the invention relates to a variable valve lift device for an internal combustion engine.
  • the present application claims priority to a Chinese patent application filed on June 16, 2008 by the Chinese Patent Office, application number 200810067764.7, and the invention titled “an internal valve variable valve lift mechanism” The entire contents of which are incorporated herein by reference.
  • the present invention relates to a control technology for variable valve lift of an internal combustion engine, and more particularly to a continuously variable valve lift device for an internal combustion engine. Background technique
  • valve lifts on existing gas trains of internal combustion engines are mostly fixed or non-continuously variable.
  • the internal combustion engine has different requirements for the gas distribution system under different working conditions and different rotational speeds.
  • the inertia of the gas is small.
  • the valve lift is too large, it is not conducive to the formation of the intake vortex.
  • the mixing of the fuel and the air will be uneven, which is not conducive to combustion.
  • the pumping gas is lost, and the internal energy consumption causes the internal combustion engine to partially reduce the working efficiency.
  • the internal combustion engine is running at a high speed, the gas flow rate is fast and the flow inertia is large.
  • the technical problem to be solved by the present invention is to remedy the above-mentioned deficiencies of the prior art, and to provide a continuously variable valve lift apparatus which can be used from a low speed to a high speed to obtain an optimum valve lift in a full speed range.
  • a device for variable valve lift of an internal combustion engine comprising a roller rocker lift mechanism and a drive mechanism, wherein the cam of the roller rocker lift mechanism cooperates with a roller
  • the drive mechanism may output a linear displacement driving force
  • the roller rocker lift mechanism further includes a second rocker arm, one end of which is connected to the output member of the drive mechanism via a rotating pin, so that a linear displacement is generated under the driving of the driving mechanism;
  • the second rocker arm has a sliding rail disposed along a linear displacement direction, and the roller rocker arm lifting mechanism
  • the rocker pin in the middle of the valve rocker arm is placed in the slide rail of the second rocker arm; the rocker pin can slide on the slide rail of the second rocker arm.
  • the driving mechanism includes a linear motor and an output shaft; the linear motor drives the output shaft, and the output shaft is coupled to the second rocker arm through the rotating pin.
  • the driving mechanism includes a control motor, an output shaft, a gear, and a rack; the control motor drives the output shaft to drive the gear to rotate, the gear meshes with the rack, and the rack passes The rotating pin is coupled to the second rocker arm.
  • the driving mechanism includes a control motor, a worm, a worm wheel, an output shaft, a gear, and a rack; the control motor drives the worm and the worm wheel, and the output shaft rotates coaxially with the worm wheel, and The gear is rotated by the output shaft, the gear meshes with the rack, and the rack is coupled to the second rocker arm by the rotating pin.
  • the device is for controlling the lift of two valves, the first valve rocker arm and the second valve rocker arm share a rocker pin, a roller and a cam;
  • the roller rocker lift mechanism further comprises a first rocker arm, one end of the first rocker arm is hinged with the rocker pin, the roller pin of the roller is hinged to the other end of the first rocker arm, and the roller pin is firstly shaken
  • the other end of the arm is passed out and placed in the slide rail of the second rocker arm; the roller pin is slidable in the slide rail of the second rocker arm.
  • first valve rocker arm and the second valve rocker arm are respectively connected to the first valve and the second valve, and the other ends of the two valve rocker arms are respectively jacked up by the first tappet and the second tappet;
  • the roller pin and the rocker pin slide on the slide rail of the second rocker arm.
  • variable valve lift device of the internal combustion engine of the present invention adopts a technical solution that the second rocker arm fulcrum is adjustable with respect to the position of the rocker arm, and the motor lifts the valve lift, the valve lifts Cheng can flexibly adjust according to the actual working conditions of the internal combustion engine, providing continuous variable valve lift from low speed to high speed, so that the internal combustion engine can provide the best valve lift in the whole working condition range, and improve the fuel economy and power of the internal combustion engine.
  • the structure of the invention and the control system are simple, and the response speed is fast.
  • FIG. 1 is a schematic structural view of a variable valve lift apparatus for an internal combustion engine according to a first embodiment
  • FIG. 2 is a schematic structural view of a variable valve lift apparatus for an internal combustion engine according to a second embodiment
  • 3 is a schematic structural view of a variable valve lift apparatus for an internal combustion engine according to a third embodiment
  • FIG. 4 is a discrete view of components of a variable valve lift apparatus for an internal combustion engine according to a third embodiment
  • Schematic diagram of the motion trajectory of the internal combustion engine lift device
  • FIG. 6 is a schematic diagram of a valve lift profile of the internal combustion engine lift apparatus of the present invention. detailed description
  • variable valve lift apparatus for an internal combustion engine of the present invention includes a drive mechanism and a roller rocker lift mechanism.
  • the following is a detailed description of the three embodiments. It should be noted that the composition and connection relationship of the roller rocker lift mechanisms of the three embodiments are basically the same, so only one roller lift is provided in this paper. Separate components of the organization to save space.
  • a driving mechanism of a variable valve lift apparatus for an internal combustion engine includes a linear motor 17, and an output shaft 4.
  • the linear motor 17 drives the output shaft 4 to drive the rotary pin 16 to move.
  • the linear motor 17 directly drives the rotary pin 16 to move, which can save a large number of intermediate transmission mechanisms, speed up the system reaction speed and improve system accuracy.
  • the roller rocker lift mechanism includes a cam 7, a roller 8, a first rocker arm 9, a second rocker arm 10 having a slide rail, a roller pin 11, a first valve 12, a second valve 12', and a first The column 13, the second tappet 13', the rocker pin 14, the first valve rocker arm 15, and the second valve rocker arm 15'.
  • the cam 7 drives a roller 8 disposed in the first rocker arm 9.
  • first rocker arm 9 is connected to the rocker arm pin 14, and the other end is connected to the second rocker arm 10 through the roller pin 11, the second rocker The arm 10, the first valve rocker arm 15 and the second valve rocker arm 15' are all connected by the rocker pin 14; one ends of the first valve rocker arm 15 and the second valve rocker arm 15' are respectively connected to the first valve 12, the second The valve 12' has the other end jacked up by the first tappet 13 and the second tappet 13'; the roller pin 11 and the rocker pin 14 slide on the slide rail of the second rocker arm 10.
  • the rocker pin 14 passes through the first valve rocker arm 15 and the second valve rocker arm 15' on both sides, so the rocker pin 14 moves with the movement of the first valve rocker arm 15 and the second valve rocker arm 15'. It is oscillated up and down around the apex of the first tappet 13 and the second tappet 13'.
  • the rocker pin 14 and the roller pin 11 are connected by the first rocker arm 9 and both slide synchronously on the slide rail of the second rocker arm 10, so that the axis of the roller pin 11 moves while rotating around the rotary pin 16
  • the relative position of the arm 14 is unchanged.
  • the first valve 12 and the second valve 12' are disposed on the cylinder, and are controlled by the first valve rocker arm 15 and the second valve rocker arm 15', respectively, to open and close the intake and exhaust valves in time, and to achieve an ideal lift of the internal combustion engine.
  • the first rocker arm 9 is integrally rotated with the axis of the rotating pin 16 and synchronized with the rocker pin 14 at the second
  • the slide rail 10 slides over the slide rails, thereby ensuring that the relative positions of the rollers 8 and the cams 7 are constant, so that they always maintain good contact.
  • the second rocker arm 10 rotates with the axis of the rotating pin 16 as a rotating shaft, and moves along the rack 6 to the left and right, and functions to provide a variable rocker arm, the variable range of which is shown in FIG.
  • Figure 5 is a schematic view showing the movement path of the variable valve lift apparatus of the internal combustion engine of the present invention, wherein: a is the center position of the rotary pin 16 when the air lift is maximum; b is the center movable range of the rotary pin 16; c is the rotation when the valve lift is minimum
  • the center position of the pin 16 d is the trajectory line of the rocker pin 14; e is the center starting point of the rocker pin 14; f is the end point of the center stroke of the rocker pin 14; g is the center starting point of the roller pin 11;
  • Figure 6 is a valve lift profile produced by the rocker pin 14 by driving the first valve rocker arm 15 and the second valve rocker arm 15'.
  • the opening and closing timings of the first valve 12 and the second valve 12' are unchanged.
  • the two profiles in the figure are valve lift profiles, wherein L1 is the minimum lift generated by the variable valve lift of the internal combustion engine of the present invention, L2 It is the maximum lift generated by the variable valve lift device of the internal combustion engine of the present invention. All valve lift profiles produced by the present invention are between the two lines, and L is an adjustable range of valve lift.
  • the lift corresponding to each moment between each profile line is in an equal proportional relationship, that is, the ratio of the lifts corresponding to any two time points of any two valve lift profiles is equal.
  • the working principle of the present invention is as follows: When the valve lift is constant, the cam 7 drives the roller 8 to swing around the rotating pin 16, and the roller 8 drives the second rocker arm 10 to rotate with the rotating pin 16 as a center of rotation through the roller pin 11.
  • the second rocker arm 10 drives the rocker pin 14 to drive the first valve rocker arm 15 and the second valve rocker arm 15' to rotate around the apex of the first tappet 13 and the second tappet 13' to drive the first valve.
  • the 12 and second valve 12' are periodically opened and closed with an appropriate lift.
  • the linear motor 17 is started by the ECU.
  • the linear motor 17 drives the output shaft 4 to move, and the output shaft 4 transmits the motion to the rotating pin 16, thereby causing the rotating pin 16 to move synchronously.
  • the adjustment range is as shown in Fig. 5.
  • the rotating pin 16 moves while the starting position of the rocker pin 14 and the roller pin 11 remains unchanged.
  • the center of the roller pin 11 corresponds to the lever control end
  • the center of the rotating pin 16 corresponds to the fulcrum
  • the center of the rocker pin 14 corresponds to the intermediate point. . That is, the position of the control end of the lever is unchanged, and the position of the fulcrum is adjustable. Then the maximum stroke of the intermediate point is changed, so that the rocker pin 14 produces an adjustable range of k as shown in FIG.
  • the moving mechanism includes a control motor 1, an output shaft 4, a control gear 5, and a rack 6.
  • the control motor 1 drives the output shaft 4 to drive the gear 5 to rotate, the gear 5 meshes with the rack 6, and the rack 6 and the second rocker arm 10 are coupled by the rotating pin 16 and are driven by the gear 5.
  • the roller rocker lift mechanism of the variable valve lift apparatus of the internal combustion engine of the second embodiment of the present invention is the same as that of the first embodiment, and its working principle is basically the same as that of the first embodiment.
  • the driving mechanism of the variable valve lift apparatus of the internal combustion engine according to the third embodiment of the present invention includes a control motor 1, a worm 2, a worm wheel 3, an output shaft 4, a control gear 5, a rack 6 and Rotating shaft 16.
  • the control motor 1 drives the worm 2 and the worm wheel 3, and drives the gear 5 to rotate through the output shaft 4, and the gear 5 meshes with the rack 6, and transmits the motion to the rotating pin 16, causing it to move.
  • the roller rocker lift mechanism of the variable valve lift apparatus for an internal combustion engine according to the third embodiment of the present invention is the same as that of the first embodiment, and its operation principle is the same as that of the first embodiment.
  • variable valve lift device of the internal combustion engine of the invention adopts a motor to control the valve lift, and the valve lift can be flexibly adjusted according to the actual working condition of the internal combustion engine, and provides a continuously variable valve lift from a low speed to a high speed, so that the internal combustion engine is in a full working condition range.
  • the principle, structure and control system of the invention have a fast response speed.

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

Description

一种内燃机可变气门升程装置 本申请要求于 2008 年 6 月 16 日提交中国专利局、 申请号为 200810067764.7、 发明名称为 "一种内燃机可变气门升程机构 "的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及一种内燃机可变气门升程的控制技术， 特别涉及一种内燃 机连续可变气门升程装置。 背景技术
现有的内燃机配气机构上的气门升程大都采用固定不变或非连续可变 的结构。 但是， 内燃机在不同工况、 不同转速下， 对配气系统有不同的要 求。 内燃机在低速运转时， 气体的流动惯性较小， 这时， 如果气门升程过 大则不利于形成进气涡流， 燃油与空气混合将不均匀， 不利于燃烧。 在这 种情况下， 又由于节气门的阻碍作用， 造成泵气损失， 内能的消耗使得内 燃机部分负荷工作效率降低。 而内燃机在高速运转时， 气体的流速较快， 流动惯性较大， 该情形下， 如果气门升程过小， 则会使进气产生强大的涡 流， 过强的涡流同样不利于燃烧。 故此时需要较大的气门升程， 以便减小 涡流比， 同时产生更多的进气 。 发明内容 本发明要解决的技术问题是弥补上述现有技术的不足， 提供一种可从 低速到高速的连续可变气门升程装置， 使内燃机在全转速范围内获得最佳 气门升程。
本发明的技术问题通过以下技术方案予以解决： 一种内燃机可变气门 升程的装置， 包括滚子摇臂升程机构和驱动机构， 所述滚子摇臂升程机构 的凸轮与滚子配合以便于控制气门升程， 所述驱动机构可以输出直线位移 的驱动力； 且所述滚子摇臂升程机构还包括第二摇臂， 其一端通过旋转销 与驱动机构的输出部件相连， 以便于在驱动机构的驱动下产生直线位移； 所述第二摇臂上具有沿直线位移方向设置的滑轨， 所述滚子摇臂升程机构 的气门摇臂中部的摇臂销置于所述第二摇臂的滑轨内； 所述摇臂销可在第 二摇臂的滑轨上滑动。
优选地， 所述驱动机构包括直线电机和输出轴； 所述直线电机驱动所 述输出轴， 所述输出轴通过所述旋转销与所述第二摇臂连接。
优选地， 所述驱动机构包括控制电机、 输出轴、 齿轮、 和齿条； 所述 控制电机驱动所述输出轴带动所述齿轮转动， 所述齿轮与所述齿条啮合， 所述齿条通过所述旋转销与所述第二摇臂连接。
优选地， 所述驱动机构包括控制电机、 蜗杆、 蜗轮、 输出轴、 齿轮、 和齿条； 所述控制电机驱动所述蜗杆和所述蜗轮， 所述输出轴与所述蜗轮 同轴转动， 并通过所述输出轴带动所述齿轮转动， 所述齿轮与所述齿条啮 合， 所述齿条通过所述旋转销与所述第二摇臂连接。
优选地， 该装置用于控制两个气门的升程， 第一气门摇臂和第二气门 摇臂共用一个摇臂销、 一个滚子和一个凸轮； 所述滚子摇臂升程机构还包 括第一摇臂， 所述第一摇臂的一端与所述摇臂销铰接， 所述滚子的滚子销 与所述第一摇臂的另一端铰接， 且该滚子销经第一摇臂的另一端穿出后置 于第二摇臂的滑轨内； 所述滚子销可在所述第二摇臂的滑轨内滑动。
优选地， 第一气门摇臂和第二气门摇臂的一端分别连接第一气门、 第 二气门， 两个气门摇臂的另一端分别由第一挺柱、 第二挺柱顶起； 所述滚 子销和摇臂销在第二摇臂的滑轨上滑动。
本发明与现有技术相比的有益效果是： 本发明的内燃机可变气门升程 装置采用第二摇臂支点相对摇臂销位置可调节的技术方案， 且由电机控制 气门升程， 气门升程可根据内燃机实际工况要求灵活调节， 提供从低速到 高速的连续可变气门升程，使内燃机在全工况范围内提供最佳的气门升程， 提高内燃机的燃油经济性和动力性。 本发明的结构以及控制系统筒单， 响 应速度快。 附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图 1是第一种实施方式所述内燃机可变气门升程装置的结构示意图； 图 2是第二种实施方式所述内燃机可变气门升程装置的结构示意图； 图 3是第三种实施方式所述内燃机可变气门升程装置的结构示意图； 图 4是第三种实施方式所述内燃机可变气门升程装置的元件分立图； 图 5是本发明所述内燃机升程装置的运动轨迹示意图；
图 6是本发明所述内燃机升程装置的气门升程型线示意图。 具体实施方式
本发明的内燃机可变气门升程装置包括驱动机构和滚子摇臂升程机 构。 下面以三种实施方式进行详细阐述， 需要说明的是， 三种实施方式的 滚子摇臂升程机构的组成和连接关系基本相同， 故本文中仅提供了一幅关 于滚子摇臂升程机构的元件分立图， 以节约篇幅。
如图 1所示， 本发明第一种实施方式的内燃机可变气门升程装置的驱 动机构包括直线电机 17、 输出轴 4。 请一并参见图 4, 直线电机 17驱动输 出轴 4带动旋转销 16运动。采用直线电机 17直接带动旋转销 16运动，可 省去大量中间传动机构， 加快系统反应速度， 提高系统精确度。
滚子摇臂升程机构包括凸轮 7、 滚子 8、 第一摇臂 9、 具有滑轨的第二 摇臂 10、 滚子销 11、 第一气门 12、 第二气门 12'、 第一挺柱 13、 第二挺柱 13'、 摇臂销 14、 第一气门摇臂 15和第二气门摇臂 15'。 所述凸轮 7驱动置 于第一摇臂 9中的滚子 8, 所述的第一摇臂 9一端连接摇臂销 14, 另一端 通过滚子销 11连接第二摇臂 10, 第二摇臂 10、第一气门摇臂 15和第二气 门摇臂 15'均通过摇臂销 14连接； 第一气门摇臂 15和第二气门摇臂 15'的 一端分别连接第一气门 12、 第二气门 12', 另一端分别由第一挺柱 13、 第 二挺柱 13'顶起；所述滚子销 11和摇臂销 14在第二摇臂 10的滑轨上滑动。 摇臂销 14贯通两侧的第一气门摇臂 15和第二气门摇臂 15', 故摇臂销 14 随着第一气门摇臂 15和第二气门摇臂 15'的运动而运动， 均是绕第一挺柱 13和第二挺柱 13'的顶点上下摆动。摇臂销 14与滚子销 11通过第一摇臂 9 连接， 都在第二摇臂 10的滑轨上同步滑动， 故滚子销 11轴线在绕着旋转 销 16运动的同时， 保持与摇臂 14相对位置不变。
第一气门 12和第二气门 12'设置在气缸上， 由第一气门摇臂 15、 第二 气门摇臂 15'分别控制以适时启闭进排气门， 并使内燃机达到理想升程。第 一摇臂 9 , 整体以旋转销 16轴线为旋转轴， 并同步随着摇臂销 14在第二 摇臂 10的滑轨上滑动，从而确保滚子 8与凸轮 7的相对位置不变，使其始 终保持良好的接触。 第二摇臂 10以旋转销 16轴线为旋转轴转动， 并随着 齿条 6左右移动， 其作用是提供可变化的摇臂， 其可变范围如图 5所示。
图 5 是本发明的内燃机可变气门升程装置运动轨迹示意图， 其中： a 为气升程最大时旋转销 16 中心位置； b为旋转销 16 中心可移动范围； c 为气门升程最小时旋转销 16中心位置； d为摇臂销 14运动轨迹线； e为摇 臂销 14中心起始点； f为摇臂销 14中心行程最小时终点； g为滚子销 11 中心起始点； h为滚子销 11运动轨迹； i滚子销 11中心终点； j为摇臂销 14中心行程最大时终点； k为摇臂销 14行程可调范围。
图 6是摇臂销 14通过驱动第一气门摇臂 15和第二气门摇臂 15'而产生 的气门升程型线。 第一气门 12和第二气门 12'的开闭时刻不变， 图中的两 条型线是气门升程型线， 其中 L1 为本发明内燃机可变气门升程装置产生 的最小升程， L2为本发明内燃机可变气门升程装置产生的最大升程。 本发 明产生的所有气门升程型线均在此两线之间， L为气门升程可调范围。 各 条型线之间所有时刻所对应的升程成等比例关系， 即任意两条气门升程型 线的任意两时刻点所对应的升程之比相等。
本发明的工作原理如下： 当气门升程一定时， 凸轮 7带动滚子 8绕旋 转销 16旋转摆动， 滚子 8通过滚子销 11带动第二摇臂 10以旋转销 16为 旋转中心摆动，第二摇臂 10则驱动摇臂销 14而带动第一气门摇臂 15和第 二气门摇臂 15'整体绕第一挺柱 13和第二挺柱 13'的顶点转动，从而驱动第 一气门 12和第二气门 12'以恰当的升程周期性地开闭。 当内燃机工况点发 生变化时， 通过 ECU发出指今， 直线电机 17启动。 直线电机 17带动输出 轴 4运动， 输出轴 4则将运动传递给旋转销 16, 从而使旋转销 16同步移 动， 其调节范围如图 5所示 b。 旋转销 16移动而摇臂销 14及滚子销 11起 始位置保持不变， 滚子销 11中心相当于杠杆控制端， 旋转销 16的中心相 当于支点，摇臂销 14中心相当于中间点。即相当于杠杆的控制端位置不变， 而支点位置可调。于是中间点最大行程发生改变，从而使摇臂销 14产生如 图 5所示 k的可调范围。
如图 2所示， 本发明第二种实施方式的内燃机可变气门升程装置的驱 动机构包括控制电机 1、 输出轴 4、 控制齿轮 5和齿条 6。 控制电机 1驱动 输出轴 4带动齿轮 5转动， 齿轮 5与齿条 6啮合， 齿条 6与第二摇臂 10 通过旋转销 16连接， 并由齿轮 5驱动。本发明第二种实施方式的内燃机可 变气门升程装置的滚子摇臂升程机构和第一种实施方式的相同， 其工作原 理和第一种实施方式的工作原理基本相同。
如图 3、 图 4所示， 本发明第三种实施方式的内燃机可变气门升程装 置的驱动机构包括控制电机 1、 蜗杆 2、 蜗轮 3、 输出轴 4、 控制齿轮 5、 齿条 6和旋转轴 16。 控制电机 1驱动蜗杆 2及蜗轮 3 , 并通过输出轴 4带 动齿轮 5转动， 齿轮 5与齿条 6啮合， 并将运动传递给旋转销 16, 带动其 产生移动。 本发明第三种实施方式的内燃机可变气门升程装置的滚子摇臂 升程机构和第一种实施方式的相同， 其工作原理和第一种实施方式的工作 原理相同。 本发明的内燃机可变气门升程装置采用电机控制气门升程， 气 门升程可根据内燃机实际工况要求灵活调节， 提供从低速到高速的连续可 变气门升程， 使内燃机在全工况范围内提供最佳的气门升程， 提高内燃机 的燃油经济性和动力性。 本发明的原理、 结构以及控制系统筒单， 响应速 度快。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说 明， 不能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术 领域的普通技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若 干筒单推演或替换， 都应当视为属于本发明的保护范围。

Claims

权 利 要 求
1、 一种内燃机可变气门升程的装置， 包括滚子摇臂升程机构， 该机构 的凸轮与滚子配合以便于控制气门升程， 其特征在于， 还包括：
驱动机构， 以输出直线位移的驱动力； 且
所述滚子摇臂升程机构还包括：
第二摇臂（ 10 ),其一端通过旋转销 ( 16 )与驱动机构的输出部件相连， 以便于在驱动机构的驱动下产生直线位移； 所述第二摇臂（10) 上具有沿 直线位移方向设置的滑轨， 所述滚子摇臂升程机构的气门摇臂中部的摇臂 销置于所述第二摇臂的滑轨内； 所述摇臂销 （14)可在第二摇臂（10) 的 滑轨上滑动。
2、根据权利要求 1所述的内燃机可变气门升程装置， 其特征在于， 所 述驱动机构机构包括直线电机（17)和输出轴 （4); 所述直线电机（17) 驱动所述输出轴（4), 所述输出轴（4)通过所述旋转销 ( 16)与所述第二 摇臂（10)连接。
3、根据权利要求 1所述的内燃机可变气门升程装置， 其特征在于， 所 述驱动机构机构包括控制电机（ 1 )、 输出轴（ 4 )、 齿轮（ 5 )、 和齿条（ 6 ); 所述控制电机（ 1 )驱动所述输出轴（4)带动所述齿轮（5)转动， 所述齿 轮（ 5 )与所述齿条（ 6 )啮合， 所述齿条（ 6 )通过所述旋转销（ 16 )与所 述第二摇臂（10)连接。
4、根据权利要求 1所述的内燃机可变气门升程装置， 其特征在于， 所 述驱动机构机构包括控制电机（1)、 蜗杆（2)、 蜗轮（3)、 输出轴 （4)、 齿轮（ 5 )、 和齿条（ 6 ); 所述控制电机（ 1 )驱动所述蜗杆（ 2 )和所述蜗 轮（3), 所述输出轴（4)与蜗轮（3) 同轴转动， 并通过所述输出轴 （4) 带动所述齿轮（ 5 )转动， 所述齿轮（ 5 )与所述齿条（ 6 )啮合， 所述齿条 (6)通过所述旋转销 ( 16)与所述第二摇臂（ 10 )连接。
5、 根据权利要求 1至 4中任意一项所述的内燃机可变气门升程装置， 其特征在于， 该装置用于控制两个气门的升程， 第一气门摇臂（15)和第 二气门摇臂（ 15' )共用一个摇臂销（ 14 )、 一个滚子（ 8 )和一个凸轮（ 7 ); 所述滚子摇臂升程机构还包括第一摇臂（9), 所述第一摇臂（9)的一端与 所述摇臂销（ 14 )铰接， 所述滚子（ 8 )的滚子销（ 11 )与所述第一摇臂（ 9 ) 的另一端铰接， 且该滚子销（11 )经第一摇臂（9)的另一端穿出后置于第 二摇臂（10) 的滑轨内； 所述滚子销 （11 )可在第二摇臂（10) 的滑轨内 滑动。
6、根据权利要求 5所述的内燃机可变气门升程装置， 其特征在于， 第 一气门摇臂（15)和第二气门摇臂（15')的一端分别连接第一气门 （12)、 第二气门 （12'), 两个气门摇臂的另一端分别由第一挺柱（13)、 第二挺柱 ( 13')顶起； 所述滚子销 （ 11 )和摇臂销 （ 14 )在第二摇臂（ 10 ) 的滑轨 上滑动。
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