WO2017107626A1 - 连续可变气门升程系统及汽车 - Google Patents

连续可变气门升程系统及汽车 Download PDF

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Publication number
WO2017107626A1
WO2017107626A1 PCT/CN2016/102103 CN2016102103W WO2017107626A1 WO 2017107626 A1 WO2017107626 A1 WO 2017107626A1 CN 2016102103 W CN2016102103 W CN 2016102103W WO 2017107626 A1 WO2017107626 A1 WO 2017107626A1
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WO
WIPO (PCT)
Prior art keywords
connecting portion
swing arm
rings
valve lift
intermediate shaft
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/CN2016/102103
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English (en)
French (fr)
Inventor
林思聪
李钰怀
刘巨江
练海年
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Automobile Group Co Ltd
Original Assignee
Guangzhou Automobile Group 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 Guangzhou Automobile Group Co Ltd filed Critical Guangzhou Automobile Group Co Ltd
Priority to US15/752,561 priority Critical patent/US10392976B2/en
Priority to EP16877437.0A priority patent/EP3396127B1/en
Publication of WO2017107626A1 publication Critical patent/WO2017107626A1/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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F01L1/462—Valve return spring arrangements
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the 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
    • 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
    • F01L2013/0068—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 with an oscillating cam acting on the valve of the "BMW-Valvetronic" type

Definitions

  • the present invention relates to the field of vehicle engine technology, and in particular to a continuously variable valve lift system and a vehicle having the valve lift system.
  • the reciprocating internal combustion engine can periodically open and close the valve through the valve driving mechanism, so that the engine can effectively inhale fresh air or combustible mixture and eliminate exhaust gas burning in the cylinder.
  • the valve movement law is solidified, and the valve lift and valve opening duration cannot be adjusted according to the actual operation of the engine.
  • the engine of the vehicle is operated under full working conditions, and it is necessary to balance high-load dynamics and low-load economy in design.
  • the fixed law of valve movement makes the engine only in an optimal state under a certain working condition, and it is impossible to balance the power and economy in most cases.
  • variable valve lift system In order to overcome such defects of the engine, a variable valve lift system is increasingly being applied to the engine.
  • the existing variable valve lift system is complicated in mechanism, the manufacturing process is difficult, and the valve opening duration cannot be adjusted.
  • the present invention provides a continuously variable valve lift system and a vehicle having the valve lift system, which has a simple structure and can adjust the valve lift and the duration of the valve opening.
  • the present invention provides a continuously variable valve lift system including a drive swing arm, a camshaft and a valve mechanism, the valve mechanism including a roller rocker arm and a valve connected to the roller rocker arm, the drive swing arm having a driving surface, the driving surface is in contact with the roller rocker arm to drive the valve to reciprocate, and the continuously variable valve lift system further comprises an intermediate shaft, an adjusting block and an adjusting swing arm, the driving swing arm
  • the adjusting block and the adjusting swing arm are sleeved on the intermediate shaft and can each swing around the intermediate shaft
  • the driving swing arm is provided with a first connecting portion
  • the adjusting block is provided with a second connecting portion
  • the adjusting swing arm is provided with a third connecting portion, the first connecting portion, the second connecting portion and the
  • the third connecting portion is arranged along a circumferential direction of the intermediate shaft, the second connecting portion is located between the first connecting portion and the third connecting portion, and two sides of the second connecting portion are respectively associated with the The first connecting portion is in contact with
  • a width of the first end of the second connecting portion is smaller than a width of the second end of the second connecting portion, and a width of the first end of the third connecting portion is greater than a second portion of the third connecting portion
  • the width of the end, the edge of the contact portion of the second connecting portion and the third connecting portion is a spiral segment.
  • a contact between the second connecting portion and the third connecting portion forms a first contact surface
  • the first contact surface is a spiral surface
  • the contact forms a second contact surface which is a plane parallel to the axis of the intermediate shaft.
  • the adjusting swing arm is provided with a roller
  • the cam shaft is provided with a cam
  • the cam forms a rolling contact with the roller
  • the driving swing arm is provided with two first rings
  • the adjusting block is provided with two second rings
  • the adjusting swing arm is provided with two third rings
  • the first a connecting portion is connected between the two first rings
  • the second connecting portion is connected between the two second rings
  • the third connecting portion is connected to the two third circles
  • the driving swing arm is sleeved on the intermediate shaft through the two first rings
  • the adjusting block is sleeved on the intermediate shaft through the two second rings.
  • the adjusting swing arm is sleeved on the intermediate shaft through the two third rings.
  • each of the first circular rings is connected with one driving surface, and the number of the valve mechanisms is two, and each of the driving surfaces is disposed corresponding to one of the valve mechanisms and constitutes a valve adjusting device. .
  • the two first rings are located between the two second rings, and the two third rings are located between the two first rings.
  • the intermediate shaft includes an intermediate section and two sliding sections at both ends of the intermediate section, the intermediate section has a diameter smaller than a diameter of the sliding section, and the two second circular rings are respectively sleeved in the The two sliding segments are slidable on the two sliding segments, and the two first annular rings and the two third circular rings are sleeved on the intermediate segment.
  • the continuously variable valve lift system further includes a return spring, one end of the return spring is fixed on the body of the engine, and the other end is fixed on the driving swing arm.
  • the present invention also provides an automobile including the above-described continuously variable valve lift system.
  • the present invention can realize the adjustment of the linear motion of the adjustment block into the adjustment swing arm by setting the adjustment block, adjusting the swing arm and driving the swing arm, and setting the contact surface between the adjustment block and the adjustment swing arm as a spiral surface.
  • the swing by changing the angle between the adjusting swing arm and the driving swing arm, and then changing the amplitude of the swing of the driving swing arm, and finally achieving the purpose of adjusting the valve lift and the duration of the valve opening, therefore, the continuous provided by the present invention
  • the variable valve lift system is simple in structure and can simultaneously adjust the valve lift and the duration of valve opening.
  • FIG. 1 is a schematic structural diagram of a continuously variable valve lift system according to an embodiment of the present invention.
  • FIG. 2 is a side elevational view showing the continuously variable valve lift system of FIG. 1.
  • FIG. 3 is a schematic view showing the connection relationship of the intermediate shaft, the adjusting swing arm, the driving swing arm and the adjusting block shown in FIG. 1.
  • FIG. 4 is a schematic structural view of another angle of view shown in FIG. 3.
  • Figure 5 is a schematic exploded view of the structure shown in Figure 3.
  • FIG. 6 is a schematic view showing the comparison of the continuously variable valve lift system shown in FIG. 1 when adjusting the valve lift.
  • FIG. 7 is a schematic diagram showing the relationship between the valve lift and the valve timing of the continuously variable valve lift system shown in FIG. 1.
  • the present invention provides a continuously variable valve lift system.
  • 1 is a schematic structural view of a continuously variable valve lift system according to an embodiment of the present invention
  • FIG. 2 is a side view structural view of the continuously variable valve lift system of FIG. 1
  • FIG. 3 is a cross-shaft of FIG.
  • FIG. 4 is a schematic structural view of another viewing angle shown in FIG. 3
  • FIG. 5 is a schematic exploded view of the structure shown in FIG. 3
  • FIG. 6 is a continuous view of FIG.
  • the continuously variable valve lift system provided by the present invention includes a driving swing arm 10 , an adjusting block 20 , an adjusting swing arm 30 , and a schematic diagram of a throttle valve lift system.
  • the driving swing arm 10 is sleeved on the intermediate shaft 40 and swings around the intermediate shaft 40.
  • the driving swing arm 10 includes a first ring 11, a first connecting portion 12 and a driving surface 13, the first ring 11 is located at the top of the driving swing arm 10 and sleeved on the intermediate shaft 40, so that the driving swing arm 10 can swing about the intermediate shaft 40.
  • the number of the first circular rings 11 can be two, and the two first circular rings 11 are spaced apart from each other. It is provided that the first connecting portion 12 is disposed between the two first rings 11 and connected to the two first rings 11. The first connecting portion 12 is close to the edge of the side of the adjusting block 20 and is parallel to the axis of the intermediate shaft 40.
  • the bottom of the driving swing arm 10 is provided with a driving surface 13 for driving the valve mechanism 60.
  • Each of the first circular rings 11 is connected to a driving surface 13, and the left side of the driving surface 13 is a circular arc segment, and the left circular arc segment is
  • the center of the intermediate shaft 40 is a center of the hollow stroke forming section 131, and the right side of the driving surface 13 is a driving section 132 for driving the roller rocker arm 61, and each driving surface 13 is in contact with the roller 611 of a roller rocker arm 61, and
  • the driving valve 62 is reciprocated, that is, the valve mechanism 60 is also two.
  • Each driving surface 13 is disposed corresponding to a valve mechanism 60 and constitutes a set of valve adjusting devices.
  • the adjusting block 20 is sleeved on the intermediate shaft 40, and is rotatable about the intermediate shaft 40 and can slide along the axial direction of the intermediate shaft 40.
  • the adjusting block 20 includes the second ring 21 and the second connecting portion 22
  • the second ring 21 is sleeved on the intermediate shaft 40 so that the adjusting block 20 can rotate around the intermediate shaft 40 and can slide along the axial direction of the intermediate shaft 40.
  • the second ring 21 can be two, two second circles.
  • the rings 21 are spaced apart from each other, and the second connecting portion 22 is disposed between the two second rings 21 and connected to the two second rings 21.
  • the width of the first end 221 of the second connecting portion 22 is smaller than the width of the second end 222, and the side of the second connecting portion 22 close to the first connecting portion 12 is a straight line parallel to the axis of the intermediate shaft 40, and the opposite another side It is a spiral segment.
  • the adjusting swing arm 30 is sleeved on the intermediate shaft 40 and swings around the intermediate shaft 40.
  • the adjusting swing arm 30 includes a third ring 31, a third connecting portion 32 and a roller 33, and the third ring 31
  • the top of the adjusting swing arm 30 is sleeved on the intermediate shaft 40, so that the adjusting swing arm 30 can swing about the intermediate shaft 40.
  • the third ring 31 can be two, and the two third rings 31 are spaced apart from each other.
  • the three connecting portions 32 are disposed between the two third rings 31 and connected to the two third rings 31.
  • the width of the first end 321 of the third connecting portion 32 is greater than the width of the second end 322, and the side of the third connecting portion 32 that is in contact with the second connecting portion 22 of the adjusting block 20 is The same spiral segment on the second connecting portion 22.
  • the roller 33 is located at one end of the adjustment swing arm 30 away from the intermediate shaft 40 and is disposed between the two third rings 31 for contacting the cam shaft 50.
  • the adjusting block 20, the driving swing arm 10, the adjusting swing arm 30 are sleeved on the intermediate shaft 40, and each of them can rotate about the axis of the intermediate shaft 40.
  • the adjustment block 20 can also move linearly along the axial direction of the intermediate shaft 40.
  • the two sides of the second connecting portion 22 are in contact with the first connecting portion 12 and the third connecting portion 32, respectively, and the sides of the second connecting portion 22
  • the first contact surface 71 is formed in contact with the side of the third connecting portion 32, and the first contact surface 71 is a spiral surface, and the rotation axis of the adjustment swing arm 30 is the axis of the intermediate shaft 40.
  • the second connecting portion 22 is in contact with the side of the first connecting portion 12 by the other side thereof and is formed with a second contact surface 72 which is parallel to the axis of the intermediate shaft 40. The plane.
  • the intermediate shaft 40 includes an intermediate portion 41 and two sliding segments 42 at opposite ends of the intermediate portion 41.
  • the diameter of the intermediate portion 41 is smaller than the diameter of the sliding portion 42, and the two second annular rings 21 are respectively sleeved on the two sliding segments 42 and The two sliding segments 42 can be slid, and the two first rings 11 and the two third rings 31 are sleeved on the intermediate portion 41.
  • the cam shaft 50 is disposed in parallel with the intermediate shaft 40.
  • the cam shaft 50 is provided with a cam 51.
  • the cam 51 is in rolling frictional contact with the roller 33 of the adjusting swing arm 30, and a third contact surface 73 is formed.
  • the cam 51 on the cam shaft 50 drives the swing arm 30 to reciprocate around the intermediate shaft 40 through the third contact surface 73, and the swing arm is adjusted.
  • the adjusting block 20 is reciprocally oscillated around the intermediate shaft 40 through the first contact surface 71, and the adjusting block 20 drives the swing arm 10 to reciprocate around the intermediate shaft 40 through the second contact surface 72, and drives the swing arm 10 through the driving surface 13 and the roller.
  • the roller 611 of the rocker arm 61 contacts the driving valve 62 to reciprocate up and down.
  • the adjusting block 20 when the valve lift and the opening duration are adjusted, the adjusting block 20 is slid along the axial direction of the intermediate shaft 40 by a motor (not shown), because the adjusting block 20
  • the first contact surface 71 between the second connecting portion 22 and the third connecting portion 32 of the adjusting swing arm 30 is a helix surface, so that the adjusting block 20 is on the intermediate shaft 40 by the spiral surface of the first contact surface 71.
  • the linear motion can be converted into an adjustment of the swing of the swing arm 30 about the intermediate shaft 40, that is, the adjusting block 20 is rotated by the helical surface of the first contact surface 71 to adjust the swing arm 30 to rotate about the intermediate shaft 40, thereby adjusting the adjusting swing arm 30.
  • the swinging amplitude of the driving swing arm 10 is increased, the valve lift is increased, and the valve 62 is extended for a long time; when the adjusting block 20 is wider toward the second end of the second connecting portion 22, that is, toward the second connecting portion 22 When one end moves, the angle between the adjustment swing arm 30 and the drive swing arm 10 is reduced, the valve lift is reduced, and the valve 62 duration is shortened.
  • FIG. 7 is a schematic diagram showing the relationship between the valve lift and the valve timing of the continuously variable valve lift system shown in FIG. 1, as shown in FIG. 7, the abscissa indicates the valve timing, and the ordinate indicates the valve lift, when the ordinate When it is zero, the difference between the time values indicated by the two abscissas is the duration of the valve opening.
  • the timing of the highest point of the valve lift does not change (i.e., T1 and T2 represent the same time).
  • T1 and T2 represent the same time.
  • the continuously variable valve lift system provided by the embodiment of the present invention can adjust the swing arm 30 for position adjustment through the adjusting block 20, and can realize continuous operation of the valve lift, the valve opening duration, and the valve maximum lift corresponding phase. Adjustment, can balance engine power and economy, use atmospheric door lift in high load area to increase engine maximum torque and maximum power, use small valve lift to control air entering the combustion chamber in low load area, improve in-cylinder tumble Optimize combustion, reduce pumping losses, and improve fuel economy.
  • the continuously variable valve lift system provided by the embodiment of the invention further comprises a return spring (not shown) and one end of the return spring. It is fixed on the body of the engine, and the other end is fixed on the driving swing arm 10.
  • valve mechanism 60 further includes a hydraulic tappet 63 on each side of the roller rocker arm 61, and a hydraulic tappet 63 for automatically adjusting the clearance of the valve 62.
  • the present invention also provides a vehicle having the above-described continuously variable valve lift system.
  • vehicle having the above-described continuously variable valve lift system.
  • the continuously variable valve lift system provided by the invention has a simple structure, and the adjusting surface of the adjusting block and the adjusting swing arm are arranged, and the contact surface between the adjusting block and the adjusting swing arm is set as a spiral surface, and the linear motion of the adjusting block is adopted.
  • the angle between the adjusting swing arm and the driving swing arm can be changed to change the swinging amplitude of the driving swing arm, thereby changing the lift of the valve and the duration of the valve opening, so that the engine can be used in the high load region and the low load region.
  • Different valve lifts taking into account power and fuel economy.
  • the continuously variable valve lift system provided by the invention has a simple structure and is provided by adjusting a block and adjusting The arm swings and sets the contact surface between the adjusting block and the adjusting swing arm as a spiral surface.
  • the amplitude of the swing which in turn changes the lift of the valve and the duration of the valve opening, allows the engine to adopt different valve lifts in the high load region and the low load region, taking into account the power and fuel economy.

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

Abstract

一种连续可变气门升程系统，包括驱动摆臂（10）、凸轮轴（50）及气门机构（60）；气门机构（60）包括滚子摇臂（61）及与滚子摇臂（61）相连的气门（62），驱动摆臂（10）具有驱动面（13），驱动面（13）与滚子摇臂（61）接触以驱动气门（62）做往复运动；连续可变气门升程系统还包括中间轴（40）、调节块（20）及调节摆臂（30）；驱动摆臂（10）、调节块（20）和调节摆臂（30）套设于中间轴（40）上并且各自均可绕中间轴（40）摆动；驱动摆臂（10）上设有第一连接部（12），调节块（20）上设有第二连接部（22），调节摆臂（30）上设有第三连接部（32）；第二连接部（22）位于第一连接部（12）与第三连接部（32）之间，第二连接部（22）的两侧分别与第一连接部（12）和第三连接部（32）接触，第二连接部（22）与第三连接部（32）之间接触形成螺旋面；调节块（20）还可沿中间轴（40）的轴向滑动，凸轮轴（50）与调节摆臂（30）接触；还公开了一种具有连续可变气门升程系统的汽车。连续可变气门升程系统和具有该系统的汽车能够对气门升程和气门开启的持续时间进行调节。

Description

连续可变气门升程系统及汽车 技术领域
本发明涉及车辆发动机技术领域，特别是涉及一种连续可变气门升程系统及具有该气门升程系统的汽车。
背景技术
往复式内燃机在工作过程中，能够通过气门驱动机构定时开启和关闭气门，以使发动机能够有效吸入新鲜空气或可燃混合气及排除缸内燃烧的废气。传统的气门驱动机构在设计完成后，气门运动规律就固化下来，气门升程和气门开启的持续期不能根据发动机的实际运行情况进行调节。
车辆的发动机是全工况运行，在设计时就需要兼顾高负荷动力性及低负荷经济性。然而固定的气门运动规律使得发动机只能在某一特定的工况下处于最佳的状态，无法在大多的情况下兼顾动力性及经济性。
为了克服发动机的此种缺陷，可变气门升程系统正在越来越多地应用于发动机中，然而现有的可变气门升程系统机构复杂，制造工艺困难且气门开启持续时间不能调节。
发明内容
有鉴于此，本发明提供一种连续可变气门升程系统及具有该气门升程系统的汽车，其结构简单，可对气门升程及气门开启的持续时间进行调节。
本发明提供了一种连续可变气门升程系统，包括驱动摆臂、凸轮轴及气门机构，所述气门机构包括滚子摇臂及与滚子摇臂相连的气门，所述驱动摆臂具有驱动面，所述驱动面与所述滚子摇臂接触以驱动所述气门做往复运动，所述连续可变气门升程系统还包括中间轴、调节块及调节摆臂，所述驱动摆臂、所述调节块和所述调节摆臂套设于所述中间轴上并且各自均可绕所述中间轴摆动，所述驱动摆臂上设有第一连接部，所述调节块上设有第二连接部，所述调节摆臂上设有第三连接部，所述第一连接部、所述第二连接部和所述 第三连接部沿所述中间轴的圆周方向排列，所述第二连接部位于所述第一连接部与所述第三连接部之间，所述第二连接部的两侧分别与所述第一连接部和所述第三连接部接触，所述第二连接部与所述第三连接部之间接触形成螺旋面，所述调节块还可沿所述中间轴的轴向滑动，所述凸轮轴与所述调节摆臂接触。
进一步地，所述第二连接部的第一端的宽度小于所述第二连接部的第二端的宽度，所述第三连接部的第一端的宽度大于所述第三连接部的第二端的宽度，所述第二连接部及所述第三连接部相接触部分的边缘均为螺旋线段。
进一步地，所述第二连接部与所述第三连接部之间接触形成第一接触面，所述第一接触面为螺旋面，所述第二连接部与所述第一连接部之间接触形成第二接触面，所述第二接触面为与所述中间轴的轴线平行的平面。
进一步地，所述调节摆臂上设有滚轮，所述凸轮轴上设有凸轮，所述凸轮与所述滚轮形成滚动接触。
进一步地，所述驱动摆臂上设有两个第一圆环，所述调节块上设有两个第二圆环，所述调节摆臂上设有两个第三圆环，所述第一连接部连接在所述两个第一圆环之间，所述第二连接部连接在所述两个第二圆环之间，所述第三连接部连接在所述两个第三圆环之间，所述驱动摆臂通过所述两个第一圆环套设于所述中间轴上，所述调节块通过所述两个第二圆环套设于所述中间轴上，所述调节摆臂通过所述两个第三圆环套设于所述中间轴上。
进一步地，每一个第一圆环上连接有一个所述驱动面，所述气门机构的数量为两个，每一个所述驱动面与一个所述气门机构相对应设置并构成一套气门调节装置。
进一步地，在所述中间轴上，所述两个第一圆环位于所述两个第二圆环之间，所述两个第三圆环位于所述两个第一圆环之间。
进一步地，所述中间轴包括中间段和位于所述中间段两端的两个滑动段，所述中间段的直径小于所述滑动段的直径，所述两个第二圆环分别套设在所述两个滑动段上并可在所述两个滑动段上滑动，所述两个第一圆环和所述两个第三圆环均套设在所述中间段上。
进一步地，所述连续可变气门升程系统还包括回位弹簧，所述回位弹簧的一端固定在发动机的机体上，另一端固定于所述驱动摆臂上。
本发明还提供了一种汽车，包括上述的连续可变气门升程系统。
综上所述，本发明通过设置调节块、调节摆臂及驱动摆臂，并将调节块与调节摆臂之间的接触面设置成螺旋面，使调节块的直线运动能够转换为调节摆臂的摆动，通过改变调节摆臂与驱动摆臂之间的夹角，继而改变驱动摆臂摆动的幅度，最后达到调整气门升程及气门开启的持续时间的目的，因此，本发明所提供的连续可变气门升程系统结构简单，可同时对气门升程及气门开启的持续时间进行调节。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图，详细说明如下。
附图概述
图1为本发明实施例提供的连续可变气门升程系统的结构示意图。
图2为图1所示连续可变气门升程系统的侧视结构示意图。
图3为图1所示中间轴、调节摆臂、驱动摆臂及调节块的连接关系示意图。
图4为图3所示另一视角的结构示意图。
图5为图3所示的结构分解示意图。
图6为图1所示连续可变气门升程系统在调节气门升程时的对比示意图。
图7为图1所示连续可变气门升程系统的气门升程与气门正时的关系曲线示意图。
本发明的较佳实施方式
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效， 以下结合附图及较佳实施例，详细说明如下。
本发明提供了一种连续可变气门升程系统。图1为本发明实施例提供的连续可变气门升程系统的结构示意图，图2为图1所示连续可变气门升程系统的侧视结构示意图，图3为图1所示中间轴、调节摆臂、驱动摆臂及调节块的连接关系示意图，图4为图3所示另一视角的结构示意图，图5为图3所示的结构分解示意图，图6为图1所示连续可变气门升程系统在调节气门升程时的对比示意图，如图1至图6所示，本发明提供的连续可变气门升程系统包括驱动摆臂10、调节块20、调节摆臂30、中间轴40、凸轮轴50及气门机构60，其中气门机构60包括滚子摇臂61及与滚子摇臂61相连的气门62。
驱动摆臂10套设在中间轴40上并可绕中间轴40摆动，在本实施例中，驱动摆臂10包括第一圆环11、第一连接部12及驱动面13，第一圆环11位于驱动摆臂10的顶部并套设于中间轴40上，使驱动摆臂10可以绕中间轴40摆动，第一圆环11的数目可以为两个，两个第一圆环11相互间隔设置，第一连接部12设置于两个第一圆环11之间并与两个第一圆环11相连。第一连接部12靠近调节块20一侧的边缘并与中间轴40的轴线平行的直线。驱动摆臂10的底部设有用于驱动气门机构60的驱动面13，每一个第一圆环11都与一驱动面13相连，驱动面13的左边为一圆弧段，左边的圆弧段以中间轴40的中心为圆心形成空行程段131，驱动面13的右边为用于驱动滚子摇臂61的驱动段132，每一驱动面13与一滚子摇臂61的滚轮611接触，并驱动气门62做往复运动，即气门机构60也为两个，每一驱动面13与一气门机构60对应设置并构成一套气门调节装置。
调节块20套设于中间轴40上，既可绕中间轴40转动又可沿中间轴40的轴向滑动，在本实施例中，调节块20包括第二圆环21及第二连接部22，第二圆环21套设于中间轴40上使调节块20既可绕中间轴40转动又可沿中间轴40的轴向滑动，第二圆环21可以为两个，两个第二圆环21相互间隔设置，第二连接部22设于两个第二圆环21之间并与两个第二圆环21相连。第二连接部22的第一端221的宽度小于第二端222的宽度，第二连接部22靠近第一连接部12的一侧为与中间轴40的轴线平行的直线，而相对的另一侧 为螺旋线段。
调节摆臂30套设于中间轴40上并可绕中间轴40摆动，在本实施例中，调节摆臂30包括第三圆环31、第三连接部32及滚轮33，第三圆环31位于调节摆臂30的顶部并套设于中间轴40上，使调节摆臂30可以绕中间轴40摆动，第三圆环31可以为两个，两个第三圆环31相互间隔设置，第三连接部32设于两个第三圆环31之间并与两个第三圆环31相连。与第二连接部22相反的，第三连接部32的第一端321的宽度大于第二端322的宽度，第三连接部32与调节块20的第二连接部22接触的一侧为与第二连接部22上相同的螺旋线段。滚轮33位于调节摆臂30远离中间轴40的一端，并设于两个第三圆环31之间，滚轮33用于与凸轮轴50接触。
也就是说，在上述的连续可变气门升程系统中，调节块20、驱动摆臂10、调节摆臂30套设在中间轴40上，并且各自均可绕中间轴40的轴线做旋转运动，同时调节块20还可沿中间轴40的轴向做直线运动。当驱动摆臂10、调节块20及调节摆臂30安装于中间轴40上时，第一连接部12、第二连接部22及第三连接部32依次沿中间轴40的圆周方向排列，第二连接部22位于第一连接部12及第三连接部32之间，第二连接部22的两侧分别与第一连接部12及第三连接部32接触，第二连接部22的侧边与第三连接部32的侧边接触并形成有第一接触面71，该第一接触面71为螺旋面，调节摆臂30的旋转轴线为中间轴40的轴线。在本实施例中，第二连接部22通过其另一侧边与第一连接部12的侧边接触并形成有第二接触面72，该第二接触面72为与中间轴40的轴线平行的平面。
更具体地，请参图5和图6，在中间轴40上，两个第一圆环11位于两个第二圆环21之间，两个第三圆环31位于两个第一圆环11之间。中间轴40包括中间段41和位于中间段41两端的两个滑动段42，中间段41的直径小于滑动段42的直径，两个第二圆环21分别套设在两个滑动段42上并可在两个滑动段42上滑动，两个第一圆环11和两个第三圆环31均套设在中间段41上。
凸轮轴50与中间轴40平行间隔设置，凸轮轴50上设有凸轮51，凸轮51与调节摆臂30的滚轮33之间为滚动摩擦接触，并形成有第三接触面73。
本发明实施例所提供的连续可变气门升程系统在控制气门62开闭时，凸轮轴50上的凸轮51通过第三接触面73带动调节摆臂30绕中间轴40往复摆动，调节摆臂30通过第一接触面71带动调节块20绕中间轴40往复摆动，调节块20通过第二接触面72带动驱动摆臂10绕中间轴40往复摆动，驱动摆臂10通过驱动面13与滚子摇臂61的滚轮611接触带动气门62做上下往复运动。当滚子摇臂61经过驱动面13的驱动段132时，气门开启；当滚子摇臂61经过驱动段132的空行程段131时，气门62关闭。
本发明实施例提供的连续可变气门升程系统在进行气门升程与开启持续时间的调整时，通过电机(图未示)使调节块20沿中间轴40的轴向滑动，由于调节块20的第二连接部22与调节摆臂30的第三连接部32之间的第一接触面71为螺旋面，故通过第一接触面71的螺旋面作用，调节块20在中间轴40上的直线运动可以转变为调节摆臂30绕中间轴40的摆动，即调节块20通过第一接触面71的螺旋面作用带动调节摆臂30绕中间轴40做旋转运动，从而调整了调节摆臂30与驱动摆臂10之间的相对角度，当调节摆臂30与驱动摆臂10之间的相对角度发生变化时，在凸轮轴50转动一圈的周期内，驱动摆臂10的摆动幅度就会发生变化，从而实现对气门升程及气门开启持续时间的调整。在本发明中，当调节块20向第二连接部22的第一端，即朝向第二连接部22较窄的一端运动时，调节摆臂30与驱动摆臂10之间的夹角会增大，此时驱动摆臂10的摆动幅度会增大，气门升程增加，气门62持续时间延长；当调节块20向第二连接部22的第二端，即朝向第二连接部22较宽的一端运动时，调节摆臂30与驱动摆臂10之间的夹角会减小，气门升程减小，气门62持续时间缩短。
图7为图1所示连续可变气门升程系统的气门升程与气门正时的关系曲线示意图，如图7所示，横坐标标示气门正时，纵坐标标示气门升程，当纵坐标为零时，所对应的两个横坐标标示的时间值之差即为气门开启的持续时间。在本发明中，气门升程发生变化时，气门升程的最高点的时刻不会发生变化(即T1与T2代表的是同一时刻)。从图7可知，当调整气门升程使气门升程增加时，气门开启的持续时间也随之增加；当气门升程减小时，气门开启的持续时间也减小。
因此，本发明实施例提供的连续可变气门升程系统，通过调节块20可带动调节摆臂30进行位置调整，可以实现对气门升程、气门开启持续时间、气门最大升程对应相位的连续调节，可以兼顾发动机动力性及经济性，在高负荷区域采用大气门升程可以提升发动机最大扭矩和最大功率，在低负荷区域采用小气门升程控制进入燃烧室的空气，提高缸内滚流，优化燃烧，减小泵气损失，提高燃油经济性。
进一步地，为了保证驱动摆臂10、调节块20与调节摆臂30始终接触，本发明实施例提供的连续可变气门升程系统还包括回位弹簧(图未示)、回位弹簧的一端固定在发动机的机体上，另一端固定在驱动摆臂10上。
进一步地，气门机构60还包括液压挺柱63，气门62及液压挺柱63分别位于滚子摇臂61的两侧，液压挺柱63用于自动调节气门62的间隙。
本发明还提供了一种汽车，具有上述的连续可变气门升程系统，关于该汽车的其它特征，请参见现有技术，在此不再赘述。
因此，本发明提供的连续可变气门升程系统，结构简单，通过设置调节块及调节摆臂，并将调节块与调节摆臂之间的接触面设置成螺旋面，通过调节块的直线运动，可以改变调节摆臂与驱动摆臂之间的夹角，达到改变驱动摆臂的摆动幅度，继而改变气门的升程及气门开启的持续时间，使发动机在高负荷区域和低负荷区域可以采用不同的气门升程，兼顾动力性及燃油经济性。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。
工业实用性
本发明提供的连续可变气门升程系统，结构简单，通过设置调节块及调 节摆臂，并将调节块与调节摆臂之间的接触面设置成螺旋面，通过调节块的直线运动，可以改变调节摆臂与驱动摆臂之间的夹角，达到改变驱动摆臂的摆动幅度，继而改变气门的升程及气门开启的持续时间，使发动机在高负荷区域和低负荷区域可以采用不同的气门升程，兼顾动力性及燃油经济性。

Claims (10)

  1. 一种连续可变气门升程系统，包括驱动摆臂(10)、凸轮轴(50)及气门机构(60)，所述气门机构(60)包括滚子摇臂(61)及与滚子摇臂(61)相连的气门(62)，所述驱动摆臂(10)具有驱动面(13)，所述驱动面(13)与所述滚子摇臂(61)接触以驱动所述气门(62)做往复运动，其特征在于：所述连续可变气门升程系统还包括中间轴(40)、调节块(20)及调节摆臂(30)，所述驱动摆臂(10)、所述调节块(20)和所述调节摆臂(30)套设于所述中间轴(40)上并且各自均可绕所述中间轴(40)摆动，所述驱动摆臂(10)上设有第一连接部(12)，所述调节块(20)上设有第二连接部(22)，所述调节摆臂(30)上设有第三连接部(32)，所述第一连接部(12)、所述第二连接部(22)和所述第三连接部(32)沿所述中间轴(40)的圆周方向排列，所述第二连接部(22)位于所述第一连接部(12)与所述第三连接部(32)之间，所述第二连接部(22)的两侧分别与所述第一连接部(12)和所述第三连接部(32)接触，所述第二连接部(22)与所述第三连接部(32)之间接触形成螺旋面，所述调节块(20)还可沿所述中间轴(40)的轴向滑动，所述凸轮轴(50)与所述调节摆臂(30)接触。
  2. 如权利要求1所述的连续可变气门升程系统，其特征在于：所述第二连接部(22)的第一端(221)的宽度小于所述第二连接部(22)的第二端(222)的宽度，所述第三连接部(32)的第一端(321)的宽度大于所述第三连接部(32)的第二端(322)的宽度，所述第二连接部(22)及所述第三连接部(32)相接触部分的边缘均为螺旋线段。
  3. 如权利要求1所述的连续可变气门升程系统，其特征在于：所述第二连接部(22)与所述第三连接部(32)之间接触形成第一接触面(71)，所述第一接触面(71)为螺旋面，所述第二连接部(22)与所述第一连接部(12)之间接触形成第二接触面(72)，所述第二接触面(72)为与所述中间轴(40)的轴线平行的平面。
  4. 如权利要求1所述的连续可变气门升程系统，其特征在于：所述调节摆臂(30)上设有滚轮(33)，所述凸轮轴(50)上设有凸轮(51)，所述凸轮(51)与所述滚轮(51)形成滚动接触。
  5. 如权利要求1所述的连续可变气门升程系统，其特征在于：所述驱动摆臂(10)上设有两个第一圆环(11)，所述调节块(20)上设有两个第二圆环(21)，所述调节摆臂(30)上设有两个第三圆环(31)，所述第一连接部(12)连接在所述两个第一圆环(11)之间，所述第二连接部(22)连接在所述两个第二圆环(21)之间，所述第三连接部(32)连接在所述两个第三圆环(31)之间，所述驱动摆臂(10)通过所述两个第一圆环(11)套设于所述中间轴(40)上，所述调节块(20)通过所述两个第二圆环(21)套设于所述中间轴(40)上，所述调节摆臂(30)通过所述两个第三圆环(31)套设于所述中间轴(40)上。
  6. 如权利要求5所述的连续可变气门升程系统，其特征在于：每一个第一圆环(11)上连接有一个所述驱动面(13)，所述气门机构(60)的数量为两个，每一个所述驱动面(13)与一个所述气门机构(60)相对应设置并构成一套气门调节装置。
  7. 如权利要求5所述的连续可变气门升程系统，其特征在于：在所述中间轴(40)上，所述两个第一圆环(11)位于所述两个第二圆环(21)之间，所述两个第三圆环(31)位于所述两个第一圆环(11)之间。
  8. 如权利要求7所述的连续可变气门升程系统，其特征在于：所述中间轴(40)包括中间段(41)和位于所述中间段(41)两端的两个滑动段(42)，所述中间段(41)的直径小于所述滑动段(42)的直径，所述两个第二圆环(21)分别套设在所述两个滑动段(42)上并可在所述两个滑动段(42)上滑动，所述两个第一圆环(11)和所述两个第三圆环(31)均套设在所述中间段(41)上。
  9. 如权利要求1所述的连续可变气门升程系统，其特征在于：所述连续可变气门升程系统还包括回位弹簧，所述回位弹簧的一端固定在发动机的机体上，另一端固定于所述驱动摆臂(10)上。
  10. 一种汽车，其特征在于：包括如权利要求1至9中任意一项所述的连续可变气门升程系统。
PCT/CN2016/102103 2015-12-24 2016-10-14 连续可变气门升程系统及汽车 Ceased WO2017107626A1 (zh)

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