WO2014110968A1 - Appareil d'entraînement pour levée de soupape variable - Google Patents

Appareil d'entraînement pour levée de soupape variable Download PDF

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Publication number
WO2014110968A1
WO2014110968A1 PCT/CN2013/090809 CN2013090809W WO2014110968A1 WO 2014110968 A1 WO2014110968 A1 WO 2014110968A1 CN 2013090809 W CN2013090809 W CN 2013090809W WO 2014110968 A1 WO2014110968 A1 WO 2014110968A1
Authority
WO
WIPO (PCT)
Prior art keywords
swing arm
adjustment frame
valve
rotation center
drive
Prior art date
Application number
PCT/CN2013/090809
Other languages
English (en)
Chinese (zh)
Inventor
刘涛
刘胜强
林文
赵国东
尹吉
王忠宁
王龙
Original Assignee
长城汽车股份有限公司
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
Priority claimed from CN201310014477.0A external-priority patent/CN103925032B/zh
Priority claimed from CN201310014388.6A external-priority patent/CN103925031B/zh
Application filed by 长城汽车股份有限公司 filed Critical 长城汽车股份有限公司
Publication of WO2014110968A1 publication Critical patent/WO2014110968A1/fr

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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
    • 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
    • F01L1/12—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
    • F01L13/0063—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
    • 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

Definitions

  • variable valve lift driving device is claimed in the Chinese Patent Office on January 15, 201, and the application number is 201 31 0014388. 6, the invention name is "a variable valve lift driving device", and Priority of Chinese Patent Application No. 201 31 0014477. 0, entitled “Variable Valve Lift Driving Device”, filed on January 15, 2013, the entire contents of which are incorporated by reference. In this application.
  • the present invention relates to engine components, and more particularly to a variable valve lift drive.
  • valve lift refers to the height at which the valve moves from just opening to fully opening, that is, the opening height of the valve.
  • the cam profile of the camshaft used in the engine is different, and the valve lift obtained is also different.
  • the valve lift of a conventional engine is fixed, that is, there is only one cam profile of the camshaft, and the lift design is a balance selection of the engine under full working conditions, so the lift is impossible to make the engine Both the high-speed zone and the low-speed zone are well-received. As a result, the engine does not get the best high-speed efficiency, and the optimal low-speed torque is not obtained, but the performance is balanced under all working conditions.
  • Variable valve lift can change the valve lift according to different operating conditions of the engine, so that the engine can get good response in both high-speed and low-speed areas, thus improving the engine's high-speed power and low-speed torque.
  • the existing variable valve lift technology can be divided into a segmented variable valve lift and a continuously variable valve lift according to its control effect. Compared with the segmented variable valve lift, the continuously variable valve lift can better match the combustion system of the engine and has certain advantages. In the existing variable valve lift drive device, most of the cam profile by changing the camshaft To get different valve lifts.
  • the specific method is to use a combined camshaft, wherein the combined camshaft is provided with a plurality of cams having different profiles, and the different cam profiles on the combined camshaft drive the valve links to reciprocate, thereby
  • the valve lift is variable.
  • the camshaft, the valve connecting rod and the like are subjected to different degrees of impact loads, thereby reducing the service life of the components.
  • the combined camshaft is more complex and of higher quality than the conventional camshaft, which increases the machining cost and fuel consumption of the engine.
  • Embodiments of the present invention provide a variable valve lift driving device to improve the service life of components and reduce the processing cost and fuel consumption of the engine.
  • a variable valve lift driving device comprising: a valve, a valve connecting rod connected to the valve, a valve rocker arm connected to the valve connecting rod, and a driving valve
  • the cam shaft that is opened or closed is characterized in that: a swing arm and a swing arm adjusting frame are arranged between the valve rocker arm and the cam shaft, and the swing arm is provided with a first rotation center and a second rotation center, and the cam shaft is rotated.
  • the swing arm swings around the first rotation center to drive the valve link to linearly reciprocate to realize opening or closing of the valve;
  • the swing arm adjustment frame has a rotating portion and a driving portion, and the driving portion is movably connected with the first rotating center of the swing arm
  • the swing arm adjustment frame rotates around the rotating portion to drive the swing arm to rotate around the second rotation center while adjusting the position of the first rotation center;
  • the swing arm adjustment frame further has a gap, and the gap is used for connecting the power a driving mechanism;
  • the power driving mechanism is configured to drive the swing arm adjusting frame to rotate around the rotating portion to drive the swing arm to rotate around the second rotating center Simultaneously adjust the position of the first center of rotation.
  • the second rotation center is disposed coaxially with the middle ' ⁇ axis of the rotating portion.
  • the surface shape of the gap is U-shaped
  • the power driving mechanism includes an eccentric shaft and a power source for driving the eccentric shaft to rotate, and the gap is engaged with the eccentric wheel on the eccentric shaft.
  • variable valve lift driving device further includes a fixed on the engine cylinder head a bearing housing, the bearing housing is coupled to the rotating portion and supports the cam shaft.
  • variable valve lift driving device further includes a return spring sleeved on the driving portion, and one end of the return spring is fixedly connected with the swing arm adjusting frame, and the other end is opposite to the pendulum The arm is fixedly connected.
  • the first rotation center is a first through hole, and the first through hole is provided with a first pin shaft, and the swing arm is movably connected to the driving portion on the swing arm adjustment frame through the first pin shaft;
  • the second rotation The center is a second through hole, and the second through hole is provided with a second pin shaft, and the second pin shaft is provided with a swing arm roller that cooperates with the cam shaft.
  • the driving portion includes a third through hole provided on the swing arm adjusting frame and a driving shaft disposed in the third through hole, and the driving shaft is movably connected to the first pin shaft.
  • the valve includes a first valve and a second valve
  • the valve link includes a first valve link connected to the first valve and a second valve link connected to the second valve
  • the valve rocker a first valve rocker arm connected to the first valve link and a second valve rocker arm connected to the second valve link
  • the swing arm including a first swing arm and a second swing arm
  • the first swing arm adjuster and the second swing arm adjuster are disposed, the first swing arm and the first swing arm adjustment frame are disposed between the first valve rocker arm and the cam shaft, the second swing arm and a second swing arm adjustment frame is disposed between the second valve rocker arm and the cam shaft, and the first swing arm adjustment frame and the second swing arm adjustment frame respectively have the first rotation center and the second rotation center
  • the first swing arm adjustment frame has a first rotating portion and
  • the first rotating portion is disposed coaxially with the second rotating center on the first swing arm adjusting frame.
  • the second rotating portion is disposed coaxially with the second rotation center on the second swing arm adjustment frame.
  • the variable valve lift driving device further includes the cam shaft and the first swing arm adjusting frame. And a bearing seat between the second swing arm adjusting frame, the bearing seat has a connecting portion, and the first rotating portion and the second rotating portion are movably connected to the connecting portion.
  • the surface shape of the first gap is different from the surface shape of the second gap.
  • the power transmission mechanism includes a crankshaft and a servo motor that drives the crankshaft rotation;
  • the crankshaft includes two coaxially disposed a straight portion and a bell crank portion between the two straight portions and fixedly connecting the two straight portions, the axes of the two straight portions being parallel to the axis of the crank portion and having a specified distance therebetween, The first gap and the second gap are respectively engaged with the crank portion.
  • the first driving portion is disposed on the first swing arm a fourth through hole on the adjusting frame and a first driving shaft disposed in the fourth through hole, the first driving shaft is movably connected with a first rotating center on the first swing arm adjusting frame;
  • the second Drive package a fifth through hole provided in the second swing arm adjusting frame and a second driving shaft disposed in the fifth through hole, the second driving shaft and the second swing arm adjusting frame
  • the first rotating center is connected to the activity.
  • the second rotation center on the first swing arm adjustment frame is a sixth through hole provided in the first swing arm, and the second rotation center on the second swing arm adjustment frame is set in the second a seventh through hole of the swing arm; a first swing arm roller is mounted in the sixth through hole, the first swing arm roller is in contact with the first cam on the cam shaft; and the seventh through hole is mounted therein a second swing arm roller, the second swing arm roller being in contact with a second cam on the camshaft.
  • the variable valve lift driving device provided by the embodiment of the present invention, when the cam shaft rotates, the swing arm is swung around the first rotating center to drive the valve link to linearly reciprocate to realize the opening or closing of the valve, and the swing arm adjusting frame rotates.
  • variable valve lift When the swing arm is rotated around the second rotation, ⁇ rotates to adjust the position of the first rotation center, so that when the first rotation center is at a position, a valve lift can be realized, when the first rotation is adjusted by the swing arm adjustment frame
  • the center allows it to achieve a different valve lift when it is located at a different location, so the valve lift can be changed depending on the operating conditions of the engine.
  • the manner in which the variable valve lift is implemented in the embodiment of the present invention is different from the prior art in that the combined camshaft is used to realize the variable valve lift, and the valve link motion is not driven by changing the cams having different profiles.
  • the camshaft used in the swing arm of the embodiment of the invention has a simple structure and small mass, and reduces the processing cost and fuel consumption of the engine.
  • the swing arm adjustment frame also has a slit, so that the components in the driving mechanism can be accommodated in the gap, saving space and making the structure of the variable valve lift driving device tighter.
  • FIG. 1 is a variable valve provided in Embodiment 1 of a variable valve lift driving device of the present invention
  • FIG. 2 is an exploded perspective view showing another modified valve lift driving device of the variable valve lift driving device provided in FIG. 1
  • FIG. 3 is a schematic diagram of a variable valve lift of the present invention
  • FIG. 4 is a schematic structural view of the power driving mechanism of FIG. 3
  • FIG. 5 is a schematic structural view of the first swing arm adjusting frame of FIG. 3
  • FIG. 6 is a schematic structural view of the second swing arm adjusting frame of FIG. 3.
  • FIG. 1 is a variable valve provided in Embodiment 1 of a variable valve lift driving device of the present invention
  • FIG. 2 is an exploded perspective view showing another modified valve lift driving device of the variable valve lift driving device provided in FIG. 1
  • FIG. 3 is a schematic diagram of a variable valve lift of the present invention
  • FIG. 4 is a schematic structural view of the power driving mechanism of FIG. 3
  • FIG. 5 is a schematic structural view of
  • variable valve lift driving device provided by the embodiment of the invention includes: a valve, a valve connecting rod connected to the valve, a valve rocker arm connected to the valve connecting rod, and a cam shaft driving the valve to open or close, wherein A swing arm and a swing arm adjusting frame are arranged between the valve rocker arm and the cam shaft.
  • the swing arm is provided with a first rotation center and a second rotation center. When the cam shaft rotates, the swing arm swings around the first rotation center to drive the valve.
  • the linear reciprocating movement of the connecting rod realizes opening or closing of the valve;
  • the swing arm adjusting frame has a rotating portion and a driving portion, and the driving portion is movably connected with the first rotating center of the swing arm;
  • the swing arm adjusting frame rotates around the swinging arm Rotating to rotate the swing arm about the second center of rotation while adjusting the position of the first center of rotation;
  • the swing arm adjuster further has a gap for connecting the power drive mechanism;
  • the power drive mechanism is for driving
  • the swing arm adjustment frame rotates around the rotating portion to drive the swing arm to rotate around the second rotation center while adjusting the position of the first rotation center.
  • the manner of realizing the variable valve lift in the embodiment of the present invention is different from the manner of using the combined camshaft to realize the variable valve lift in the prior art, and does not have a change due to the change.
  • cam drives the valve linkage to impact the camshaft, valve linkage and other components, prolonging the service life of the camshaft, valve linkage and other related components; and because it is not set on the camshaft
  • a plurality of cams having different profiles so that the camshaft used in conjunction with the swing arm in the embodiment of the present invention has a simple structure and a small mass, which reduces the processing cost and fuel consumption of the engine.
  • the swing arm adjuster also has a slit, so that the components in the drive mechanism can be accommodated in the gap, saving space and making the structure of the variable valve lift drive more compact.
  • FIG. 1 is an exploded perspective view showing a variable valve lift driving device according to Embodiment 1 of the variable valve lift driving device of the present invention. As shown in FIG.
  • variable valve lift driving device includes: a valve 1 1 , a valve connecting rod 12 connected to the valve 1 1 , a valve rocker arm 13 connected to the valve connecting rod 12 , and a driving valve 1 1 open or
  • the closed camshaft 14 is provided with a swing arm 15 and a swing arm adjusting frame 16 between the valve rocker arm 13 and the cam shaft 14.
  • the swing arm 15 is provided with a first rotation center 151 and a second rotation center 152, and the cam shaft 14 When the rotation swings the swing arm 15 around the first rotation center 151 to drive the valve link 12 to linearly reciprocate to realize the opening or closing of the valve 1 1 ;
  • the swing arm adjustment frame 16 has the rotating portion 161 , the driving portion 162 , the driving portion 162 and the pendulum
  • the first rotation center 151 of the arm 15 is movably connected;
  • the swing arm adjustment frame 16 rotates around the rotating portion 161 to drive the swing arm 15 to rotate around the second rotation center 152 while adjusting the position of the first rotation center 151;
  • the swing arm adjustment frame 16 further
  • the opening 163 is configured to connect the power driving mechanism 17;
  • the power driving mechanism 17 is configured to drive the swing arm adjusting frame 16 to rotate around the rotating portion to drive the swing arm 15 to rotate around the second rotating center 152 while adjusting the first rotating center 151.
  • the components in the power drive mechanism 17 can be housed in the recess 163, saving space and making the structure of the variable valve lift drive more compact.
  • a valve lift can be realized.
  • the power driving mechanism drives the swing arm adjustment frame 16 to rotate around the rotating portion 161 to drive the swing arm 15 to rotate around the second rotation center 152, the adjustment is performed.
  • the first rotation center 151 can realize another different valve lift when it is located at another different position. Therefore, the embodiment of the present invention provides The variable valve lift drive can continuously adjust the valve lift.
  • the variable valve lift driving device realizes the variable valve lift in a manner different from the prior art in that the combined camshaft realizes the variable valve lift, and does not have different profiles due to the change.
  • the cam drives the valve link movement to impact the camshaft, the valve connecting rod and the like, and prolongs the service life of the camshaft, the valve connecting rod and the like, and does not have a plurality of camshafts.
  • the cams of different profiles, therefore, the camshaft used in combination with the swing arm in the embodiment of the present invention has a simple structure and a small mass, which reduces the processing cost and fuel consumption of the engine.
  • the swing arm adjusting frame 16 is hinged on the fixed component of the engine, for example, hinged on the cover of the engine, and the swing arm adjusting frame 16 can rotate around the hinge. Therefore, the central axis of the rotating portion 161 is the hinge, and the central shaft is fixed. When the first center of rotation 151 is in the first position, the swing arm adjuster 16 is rotated about the center of the rotating portion 161 by an angle such that the first center of rotation 151 is located at another second position different from the first position.
  • the second rotation center 152 may be coaxial with the central axis of the rotating portion 161 of the swing arm adjustment frame 16, such that if the first rotation center 151 is known from the first position to the second position, the swing arm adjustment frame
  • the angle value of the swing arm 15 about the second rotation center 152 can also be known by the angle value of the rotation around the central axis of the rotating portion 161.
  • the angle value of the swing arm adjustment frame 16 about the central axis of the rotation portion 161 can be known.
  • the surface shape of the cutout 163 may be U-shaped, and the power driving mechanism 17 may include an eccentric shaft 31 and a power source for driving the rotation of the eccentric shaft 31, if When the eccentric 31 1 rotates relative to the U-shaped opening 163, a part of the energy is lost, and the efficiency of transmitting power is low.
  • the notch 163 is engaged with the eccentric 31 1 on the eccentric shaft 31. That is, there is no relative movement between the eccentric 31 1 and the U-shaped opening 163, so that the eccentric 31 1 directly transmits power to the swing arm adjustment frame 16, which has less energy loss and high transmission efficiency.
  • the variable valve lift driving device provided by the above embodiment as shown in FIG.
  • the bearing housing 32 is fixed to the engine head, and the bearing housing 32 is connectable to the rotating portion 161 and supports the cam shaft 14 so that the central shaft of the rotating portion 161 is fixed, so that the bearing capacity of the cam shaft 14 is better.
  • the central axis of the rotating portion 161 is fixed, so that it is easier to know the angle by which the swing arm adjusting frame 16 is rotated about the central axis of the rotating portion 161 when the position of the swing arm adjusting frame 16 is changed.
  • variable valve lift driving device may further include: a return spring 33 sleeved on the driving portion, the return spring 33-end is fixedly connected with the swing arm adjusting frame 16, and the other end and the swing arm 15 fixed connection.
  • the first rotating center 151 is a first through hole 41, and the first through hole 41 is provided with a first pin shaft 411, and the swing arm 15 passes through
  • the first pin 411 is movably connected to the driving portion 162 of the swing arm adjusting frame 16;
  • the second rotating center 152 is a second through hole 42, and the second through hole 42 is provided with a second pin 421, and the second pin 421
  • a swing arm roller 43 that cooperates with the cam shaft 14 is provided thereon.
  • the first rotating center 151 may be a first through hole 41
  • the second rotating center 152 may be a second through hole 42.
  • the first through hole 41 may be provided with a first pin 411, and the swing arm 15 is movably connected to the driving portion 162 of the swing arm adjusting frame 16 through the first pin shaft 411; the second rotating center 152 may be a second through hole 42, and the second pin shaft 421 may be provided with a cooperative movement with the cam shaft 14
  • the swing arm roller 43 drives the swing arm roller 43 to swing the swing arm 15 around the first pin shaft 411 to open or close the valve 11.
  • the swing arm adjuster 16 rotates to swing the swing arm 15 around the second pin 421.
  • the shaft is rotated to adjust the position of the first pin shaft 411.
  • first rotation center 151 and the second rotation center 152 are not limited to the through holes.
  • the swing arm 15 may be integrally formed with the first pin 411 or may be integrally formed with the second pin 421. Forming, in this form, the swing arm 15 does not rotate about the first pin shaft 411 or the second pin shaft 412 which is integrally formed, but rotates therewith.
  • the swing arm roller 43 can temporarily fix the position of the second rotation center 152 to drive the pendulum
  • the arm 15 rotates about a second center of rotation 152.
  • the swing arm roller 43 can be fixed against the other components in contact with the swing arm roller 43 , for example, against the cam of the camshaft 14 , and then the swing arm 15 is driven to rotate.
  • the second pin 421 rotates relative to the swing arm roller 43, so that the swing arm 15 can rotate about the second center of rotation 152.
  • the cam shaft 14 is rotated, the large end of the cam on the cam shaft 14 abuts against the swing arm roller 43 and the swing arm roller 43 drives the second pin shaft 421.
  • the second pin 421 drives the swing arm 15 to swing around the first rotation center 151.
  • the driving portion 162 may include a third through hole 44 disposed on the swing arm adjusting frame 16 and a driving shaft 45 disposed in the third through hole 44, and the driving shaft 45 It is movably connected to the first rotation center 151.
  • the swing arm 15 can be rotated about the drive shaft 45, and the drive shaft 45 shares a shaft with the first rotation center 151, which greatly reduces the difficulty of ensuring that the drive shaft 45 is coaxial with the first rotation center 151 during assembly.
  • the drive shaft 45 can directly transmit power on the swing arm mount 16 to the swing arm 15 with its active link without the need to provide additional power transmitting components.
  • a bearing 46 may be disposed between the first pin 41 1 and the first through hole 41, and the first pin 41 1 and the first through hole 41 may be With better relative motion, the bearing 46 can be a needle bearing, which has a small radial thickness and is suitable for being placed in a narrow space between the first pin 41 1 and the first through hole 41.
  • the number of the bearings 46 is two, and the two bearings are sleeved on the first pin 41 1 and are in clearance with the first pin 41 1 , so that the bearing is prevented from being generated on the first pin 41 1 .
  • a bushing (not shown) of the 4-way bearing 46 may be sleeved on the first pin 41 1 between the two bearings 46. It should be clear that the number of needle bearings may not be limited to two. One.
  • the both ends of the first pin 41 1 may be engaged with a retaining spring for preventing axial sway of the first pin 41 1 .
  • variable valve lift driving device provided in the above embodiment, the two ends of the second pin shaft 421 may be engaged with a retaining spring for preventing axial sway of the second pin shaft 421.
  • Embodiment 2 of variable valve lift driving device
  • Fig. 3 is a schematic exploded view showing the structure of the variable valve lift driving device of the present invention.
  • the variable valve lift driving device includes: a first valve 1-11 and a second valve 1-1, a first valve link 1-12 connected to the first valve 1-11, and a second valve link 1-12' connected to the second valve 1-1, a first valve rocker 1-13 connected to the first valve link 1-12, and a second valve link 1-12' a second valve rocker arm 1-13', and a camshaft 1-14 that drives the first valve 1-11 and the second valve 1-1 to open or close, at the first valve rocker arm 1-13 and the camshaft 1-14
  • the second swing arm adjusting frame 1-16' the first swing arm 1-15 is provided with a first rotation center 1-151 and a second rotation center 1-152, and the second swing arm 1-15' is provided with a first a rotation center 1-15 and a second rotation center 1-152', the first swing arm adjustment frame 1-16 is provided with a first driving portion 1-162 movably connected to the first rotation center 1-151, and the second pendulum
  • the arm adjustment bracket 1-16' is provided with a second drive movably connected to the first rotation center 1-15 Department 1-162'.
  • the first swing arm 1-15 When the camshaft 1-14 rotates, the first swing arm 1-15 is swung around the first rotation center 1-151 to drive the first valve link 1-12 to linearly reciprocate to open or close the first valve 1-11, and When the camshaft 1-14 rotates, the second swing arm 1-15' is swung around the first rotation center 1-15 to drive the second valve link 1-12' to linearly reciprocate to open or close the second valve 1-1. .
  • the first swing arm adjusting frame 1-16 rotates around its first rotating portion 1-161 to drive the first driving portion 1-162 to rotate around the first rotating portion 1-161 while adjusting the position of the first rotating center 1-151.
  • the second swing arm adjusting frame 1-16' rotates around its second rotating portion 1-161' to drive the second driving portion 1-162' to rotate around the second rotating portion 1-161' while adjusting the first rotating center 1- 15 position;
  • the first swing arm adjustment frame 1-16 is provided with a first gap 1-163, and the second swing arm adjustment frame 1-16' is provided with a second gap 1-163', the first gap 1-163 and the second gap 1-163' is used to connect the power drive mechanism 1-17, so that the components in the power drive mechanism 1-17 can be accommodated in the first gap 1-163 and the second gap 1-163', saving space and making it variable Valve lift drive
  • the structure is more compact.
  • valve lift when the first rotation center 1-151 is located at one position, a valve lift can be realized, and when the first rotation center 1-151 is adjusted to be at another different position, another different valve lift can be realized.
  • a valve lift can be achieved when the first center of rotation 1-15 is at a position, and another different valve lift can be achieved when the first center of rotation 1-15 is adjusted to be at a different position.
  • the valve lift of the first valve may be the same as or different from the valve lift of the second valve. Therefore, the valve lift of the first valve and the second valve can be changed depending on the operating conditions of the engine.
  • the manner of realizing the variable valve lift in the embodiment of the present invention is different from the manner in which the combined camshaft is used to realize the variable valve lift in the prior art, and the movement of each valve link is not driven by changing the cams having different profiles.
  • the impact on the camshaft and the valve connecting rods, etc. prolongs the service life of the camshafts, valve links and other related components; and because there are no cams with different profiles on the camshaft Therefore, the cam shaft used in combination with each swing arm in the embodiment of the present invention has a simple structure and a small mass, and reduces the processing cost and fuel consumption of the engine.
  • the first swing arm adjusting frame 1-16 is hinged to the fixed position component of the engine, for example, hinged on the cover of the engine, and the first swing arm adjusting frame 1
  • the -16 is rotatable about the hinge, so that the center of the first rotating portion 1-161 is the hinge, and the center is fixed.
  • the first rotation center 1-151 is in the first position
  • the first swing arm adjustment frame 1-16 is rotated about the first rotation portion 1-161 by an angle such that the first rotation center 1 - 151 is located at the other Different from the second position of the first position.
  • the second rotation center 1-152 may be disposed coaxially with the first rotation portion 1-161 of the first swing arm adjustment frame 1-16, such that if the first rotation center 1-151 is known from the first position to the second During the position, the first swing arm adjusting frame 1-16 is rotated around the first rotating portion 1-161, and the first swing arm 1-15 is also known to be around the second rotating center 1-152. The angle value of the turn. Of course, if the angle value of the first swing arm 1-15 rotated around the second rotation center 1-152 is known, it can be known that the first swing arm adjustment frame 1-16 surrounds the first rotating portion 1-161. The angle value that was rotated.
  • the second swing arm adjusting frame 1-16' Hinged to the fixed position of the engine, for example hinged on the cover of the engine, the second swing arm adjuster 1-16' can rotate around the hinge, so the center of the second rotating portion 1-161' is Hinged, and the center is fixed.
  • the first rotation center 1-15 is in the first position
  • the second swing arm adjustment frame 1-16' is rotated around the second rotation portion 1-161' so that the first rotation center 1-15 is located. Another second location that is different from the first location.
  • the second rotation center 1 - 152' may be disposed coaxially with the second rotation portion 1-161' of the second swing arm adjustment frame 1-16', so that if the first rotation center 1-15 is known from the first During the position to the second position, the angle of the second swing arm 1-16' rotated around the second rotating portion 1-161' can also be known that the second swing arm 1-15' The angle value of the two rotation centers 1-152'. Of course, if the angle value of the second swing arm 1-15' rotated around the second rotation center 1-152' is known, it can be known that the second swing arm adjustment frame 1-16' surrounds the second rotation portion. 1-16 The angle value that was rotated. As shown in FIG.
  • variable valve lift driving device may further include a cam shaft 1-14, a first swing arm adjusting frame 1-16, and a second swing arm adjusting frame 1-16'.
  • the bearing housing 1-21 has a connecting portion 1-211, and the first rotating portion 1-161 and the second rotating portion 1-16 are movably connected to the connecting portion 1-211.
  • the bearing housing 1-21 can support the cam shaft 1-14, so that the bearing capacity of the cam shaft is better.
  • the bearing housing is connected to the engine cylinder head, so that the first rotating portion 1-161 and the second rotating portion 1-16 which are movably connected to the upper connecting portion 1-211 are fixed in position, so that the first swing arm adjusting frame 1 -
  • the position of the 16 and second swing arm adjustment brackets 1-16' is fixed, so that the structure of the variable valve lift driving device is simpler and more compact.
  • the power driving mechanism 1-17 can also be included, and the power driving mechanism 1-17 can drive the first swing arm adjusting frame 1-16 around itself.
  • a rotating portion 1-161 is rotated to drive the first driving portion 1-162 to rotate around the first rotating portion 1-161 while adjusting the position of the first rotating center 1-151, and is also capable of driving the second swing arm adjusting frame 1-16' Rotating around its own second rotating portion 1-16 to drive the second driving portion 1-162' to rotate around the second rotating portion 1-16 while adjusting the position of the first rotating center 1-15, so that the first swing arm adjusting frame 1 -16,
  • the second swing arm adjustment frame 1-16' has better rotation effect.
  • the surface shapes of the first gap 1-163 and the second gap 1 - 163' may both be U-shaped. The U-shaped gap is easy to process, and it is also convenient to set the power drive mechanism 1-17.
  • the surface shape of the first gap 1-163 and the second gap 1-163' is not limited to the U shape, and may be other shapes that are easy to process.
  • the surface shape of the first gap 1-163 may be different from the surface shape of the second gap 1-163'.
  • the first The positions of the first driving portion 1-162 and the second driving portion 1-162' on the swing arm adjusting frame 1-16 and the second swing arm adjusting frame 1-16' are different from each other to thereby make the first valve 1-11 It is different from the valve lift of the second valve 1-1. That is to say, different opening degrees of the first valve 1-11 and the second valve 1-1 can be achieved.
  • variable valve lift driving device in the embodiment of the present invention can make the first valve and the second valve lift in the same cylinder different under different working conditions, and can be adjusted under certain working conditions.
  • the opening of the two valves is inconsistent to improve the combustion efficiency of the engine under this condition, thereby providing the engine's power, economy and idle stability. At the same time, it can also reduce the emissions of engine exhaust.
  • the power driving mechanism 1-17 includes a crank shaft 1-31 and a servo motor that drives the crank shaft 1-31 to rotate (not shown)
  • the crank shaft 1-31 includes two straight portions 1-311 disposed coaxially and a crank portion 1-312 located between the two straight portions 1-311 and fixedly connecting the two straight portions, two straight lines
  • the axis of the portion 1-311 is parallel to the axis of the crank portion 1-312 and has a specified distance therebetween, and the first gap 1-163 and the second gap 1 - 163' are all engaged with the crank portion 1-312.
  • the crank portion 1-312 is rotated relative to the first gap 1-163 or the second gap 1-163', a part of the energy will be lost, and the efficiency of transmitting power is low.
  • the first gap 1-163 and the second gap 1-163' are all engaged with the crank portion 1-312 on the crank shaft 1-31. That is, there is no relative movement between the crank portion 1-312 and the first gap 1-163 or the second gap 1-163', so that the crank portion 1-312 can directly transmit power to the first swing arm adjustment frame 1 -16 and the second swing arm adjustment frame 1-16' have less energy loss and higher transmission efficiency.
  • the variable valve lift driving device provided by the above embodiment, referring to FIG. 5 and FIG.
  • the first driving portion 1-162 may further include a fourth through hole 1 - 1 disposed on the first swing arm adjusting frame 1-16 41 and a first driving shaft 1-42 disposed in the fourth through hole 1-41, the first driving shaft 1-42 is movably connected to the first rotating center 1-151; the second driving portion 1-162' is included in a fifth through hole 1-51 on the second swing arm adjusting frame 1-16' and a second driving shaft 1-52 disposed in the fifth through hole 1-51, the second driving shaft 1-52 and the first rotation Center 1-15 active connection.
  • the first swing arm 1-15 can rotate about the first drive shaft 1-42, and the first drive shaft 1-42 shares one axis with the first rotation center 1-151, which greatly reduces the first drive shaft 1 during assembly.
  • the second swing arm 1-15' can rotate about the second drive shaft 1-52, and the second drive shaft 1-52 shares a shaft with the second rotation center 1-152', which greatly reduces the second time during assembly.
  • the first drive shaft 1-42 can directly transmit power on the first swing arm mount 1-16 to the first swing arm 1-15 with its active link without the need to provide additional power transmitting components. It is not difficult to see that the second drive shaft 1-52 is the same.
  • the variable valve lift driving device provided by the above embodiment, referring again to FIG.
  • the second rotation center 1-152 may be a sixth through hole 1-153 disposed on the first swing arm 1-15, and the second rotation center 1 -152' may be a seventh through hole 1-153' provided in the second swing arm; a first swing arm roller 1-154 is installed in the sixth through hole 1-153, the first swing arm roller 1-154 Contacting the first cam 1-141 on the camshaft 1-14; installing the second swing arm roller 1-154' in the seventh through hole 1-153', the second swing arm roller 1-154' and The second cams 1-142 on the camshafts 1-14 are in contact.
  • first swing arm roller 1-154 and the second swing arm roller 1-154' can skillfully fix the positions of the second rotation center 1-152 and the second rotation center 1-152' to drive the first The swing arm 1-15 rotates about the second rotation center 1-152, and the second swing arm 1-15' rotates about the second rotation center 1-152'.
  • first swing arm roller 1-154 and the second swing arm roller 1-154' are abutted against other components in contact with the first swing arm roller 1-154 and the second swing arm.
  • Sub 1-154' is fixed.
  • the first swing arm roller 1-154 can be in contact with the first cam 1-141 on the camshaft 1-14.
  • the second swing arm roller 1-154' is in contact with the second cam 1-142 on the camshaft 1-14.
  • the first swing arm 1-15 and the second swing arm 1-15' are then driven to rotate so that the first swing arm 1-15 can rotate about the second rotation center 1-152, and the second swing arm 1-15' can surround the first The second rotation center 1-152' rotates.
  • the cam shaft 1-14 rotates, the cam The large end of the first cam 1-141 on the shaft 1-14 abuts against the first swing arm roller 1-154, and the large end of the second cam 1-142 abuts against the second swing arm roller 1-154', thereby
  • the first swing arm roller 1-154 drives the first swing arm 1-15 to swing around the first rotation center 1-151, and the second swing arm 1-15' swings around the first rotation center 1-15.

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

Abstract

La présente invention concerne un appareil d'entraînement pour une levée de soupape variable, et se rapporte à des pièces de moteur, en vue d'augmenter la durée de vie des pièces et de réduire le coût de traitement et la consommation en carburant du moteur. L'appareil d'entraînement comprend une soupape, une tige de liaison de soupape, un bras oscillant de soupape, et un arbre à cames entraînant la soupape à ouvrir ou à fermer. Un bras oscillant et un cadre de réglage de bras oscillant sont disposés entre le bras oscillant de soupape et l'arbre à cames, un premier centre de rotation et un second centre de rotation sont disposés sur le bras oscillant, et lorsque l'arbre à cames tourne, l'arbre à cames entraîne le bras oscillant de sorte à osciller autour du premier centre de rotation, de façon à entraîner la tige de liaison de soupape en vue d'effectuer un mouvement de va-et-vient linéaire pour ouvrir ou fermer la soupape. Le cadre de réglage de bras oscillant comporte une partie tournante et une partie d'entraînement, et la partie d'entraînement se trouve en liaison flexible avec le premier centre de rotation du bras oscillant. Le cadre de réglage de bras oscillant tourne autour de la partie tournante de sorte à entraîner le bras oscillant à tourner autour du second centre de rotation et à régler la position du premier centre de rotation, et le cadre de réglage de bras oscillant présente en outre un espace utilisé pour être relié à un mécanisme à entraînement électrique. La présente invention est utilisée pour la mise en œuvre de la variabilité continue d'une levée des soupape.
PCT/CN2013/090809 2013-01-15 2013-12-28 Appareil d'entraînement pour levée de soupape variable WO2014110968A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201310014388.6 2013-01-15
CN201310014477.0 2013-01-15
CN201310014477.0A CN103925032B (zh) 2013-01-15 2013-01-15 一种可变气门升程驱动装置
CN201310014388.6A CN103925031B (zh) 2013-01-15 2013-01-15 一种可变气门升程驱动装置

Publications (1)

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WO2014110968A1 true WO2014110968A1 (fr) 2014-07-24

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070295292A1 (en) * 2006-06-27 2007-12-27 Otics Corporation Variable valve mechanism
CN101260818A (zh) * 2007-03-05 2008-09-10 皮亚乔公司 用于连续地改变内燃机中气门的升程和相位的系统
US20090126666A1 (en) * 2005-09-08 2009-05-21 Mitsuru Sugimoto Engine valve operating system
CN101490369A (zh) * 2006-05-31 2009-07-22 麦加戴恩公共有限公司 具有可变气门致动机构的发动机
CN101529057A (zh) * 2006-10-24 2009-09-09 丰田自动车株式会社 内燃发动机的气门机构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090126666A1 (en) * 2005-09-08 2009-05-21 Mitsuru Sugimoto Engine valve operating system
CN101490369A (zh) * 2006-05-31 2009-07-22 麦加戴恩公共有限公司 具有可变气门致动机构的发动机
US20070295292A1 (en) * 2006-06-27 2007-12-27 Otics Corporation Variable valve mechanism
CN101529057A (zh) * 2006-10-24 2009-09-09 丰田自动车株式会社 内燃发动机的气门机构
CN101260818A (zh) * 2007-03-05 2008-09-10 皮亚乔公司 用于连续地改变内燃机中气门的升程和相位的系统

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