CN104775866A - Driving device for suction and exhaust valve of internal combustion engine - Google Patents
Driving device for suction and exhaust valve of internal combustion engine Download PDFInfo
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- CN104775866A CN104775866A CN201510101924.5A CN201510101924A CN104775866A CN 104775866 A CN104775866 A CN 104775866A CN 201510101924 A CN201510101924 A CN 201510101924A CN 104775866 A CN104775866 A CN 104775866A
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- rocking arm
- limiting groove
- working surface
- horizontal limiting
- combustion engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides a driving device for a suction and exhaust valve of an internal combustion engine. The driving device for the suction and exhaust valve of the internal combustion engine comprises a cam (1) and a rocker arm (2), and is characterized by also comprising a horizontal adjustment mechanism (3) and a vertical adjusting mechanism (6), wherein the horizontal adjustment mechanism (3) comprises a horizontal adjusting piece (4) and a vertical limiting piece (5); the horizontal adjusting piece (4) is movably positioned between the vertical limiting piece (5) and the rocker arm (2); the vertical adjusting mechanism (6) comprises a vertical adjusting piece (9) and a horizontal limiting groove (7); the vertical adjusting piece (9) can be positioned in the horizontal limiting groove (7) in a relatively movable way.
Description
Technical field
The present invention relates to a kind of air inlet valve and air outlet valve of internal combustion engine drive unit, particularly a kind of drive unit with variable air inlet valve and air outlet valve of internal combustion engine stroke, this device comprises cam and rocking arm.
Background technique
For petrol engine, owing to operating under partial load condition of being everlasting, coefficient of residual gas is higher, therefore how to improve engine combustion working stability, and pumping loss during reduction sub load, organizes combustion process fast, improves combustion efficiency just very important.Therefore, wish when part load engine by less valve lift, improve intake pressure difference, increase the airspeed by valve, increase turbulence intensity, improve velocity of propagation of flame and velocity of combustion, organize combustion process fast.And need to adopt larger valve lift when high engine speeds high load, farthest to reduce flow resistance, improve the fill factor of cylinder, meet power character demand during high engine speeds.
Except regulating the air inflow demand of motor, in order to realize miller cycle on petrol engine or diesel engine, implement internal EGR, change effective compression ratio, improve combustion efficiency, realize part cylinder deactivation, realize low-temperature burning or HCCI burning with the demand of the discharge of the fuel economy and reduction exhaust pollutant that improve motor; Improve cold starting performance, realize powerful motor brake etc. and increase the demands such as the commodity of motors and can be realized by variable air valve lift range mechanism.Separately there is document to discuss about these application, be not repeated.
In the face of engines fuel-economizing and the requirement of discharging increasingly stringent, in order to meet motor under different rotating speeds and moment of torsion to current-controlled requirement, Under Different Work Condition of Engine to be optimized thus the demand such as fuel-economizing and emission performance improving motor is set out, occur as Japanese Patent Laid-Open 11-107725, German patent DE 10123186, US Patent No. 5365895, Japanese Patent Laid-Open 2001-263015 etc. can carry out the technological scheme of the maximum lift of internal combustion engine valve being carried out the mechanism regulated.
Disclose in Japanese Patent Laid-Open 2-221614 and a kind ofly on same camshaft, install 2 cams being applicable to different operating mode, such as one is at a high speed, and another is for low speed.In order to improve the adaptive capacity to different operating mode, also there is the situation of installation 3 cams in actual applications, switching in different operating modes and using different cams, belonging to discontinuous valve lift adjusting mechanism.But for the demand for control that current motor is day by day complicated, this technological scheme is just difficult to meet.
Wherein, Japanese Patent Laid-Open 11-107725 have employed 4 linkage type changeable mechanisms, with one of them node as driving, with another node as adjustment, can carry out continual continuous adjustment to the lift of engine valve.The feature of this structure is more effective for very cup type valve mechanism.But cause moving parts to increase owing to have employed 4 linkage mechanisms, friction pair is increased, causes surface friction drag to strengthen.System bulk increases, and system inertia is increased, causes driving power to increase.In order to meet the requirement of system accuracy, needing the accuracy of manufacturing improving each component, causing higher manufacture cost; Because the complexity of system is higher, also increase the cost realizing system reliability goal.
Wherein German patent DE 10123186 is a kind of changeable mechanisms of valve system for having rocking arm, is also continuous variable.Be characterized on master rocker, add a secondary-rocker, change cam Direct driver secondary-rocker into by the master rocker that actuated by cams is original, then regulated by adjusting axle and pass to the amount of exercise of master rocker from secondary-rocker thus reach and regulate the lift of valve, realize lift variable.This technological scheme is owing to adding secondary-rocker and accessory thereof, and inevitably make system motion part increase, friction pair increases, and causes surface friction drag to strengthen.Volume increases, and system inertia is increased, causes driving power to increase.The problem that this system equally also has cost component manufacture cost being increased and realize system reliability goal to increase.
Japanese Patent Laid-Open 2001-263015 is a kind of changeable mechanism of valve system for having rocking arm, is also continuous variable.Be characterized between rocking arm and cam, add two secondary-rockers, these two secondary-rockers are connected by the axle that has helical tooth, the axle having a helical tooth by push-and-pull changes the angle between two secondary-rockers, thus reach momental transmission ratio between adjustment cam to master rocker, realize the adjustment of valve lift.This technological scheme, owing to adding two secondary-rockers, equally inevitably makes system motion part increase, and volume increases, and causes system inertia large, needs larger driving power.When particularly using the axle with helical tooth to carry out regulating and controlling, because friction pair is numerous, when can make adjustment lift, required power increases considerably, and this can cause the increasing of drive system volume and the raising of cost.In addition, the processing cost of the axle and secondary-rocker with helical tooth is also be much higher than common rocking arm and pitman arm shaft.It is many that this technological scheme has moving parts equally, and volume is large, and friction pair is many, and surface friction drag is large, and system inertia is large, need larger driving power and component manufacture cost high and realize the high problem of the cost of system reliability goal.
US Patent No. 5365895 discloses a kind of variable air inlet and exhaust valve lift device for internal-combustion engine, and the maximum lift of its valve is also continuous variable.Technological scheme disclosed in this patent adopts the mode changing rocking arm oscillation center position to change the lift of air inlet valve and air outlet valve of internal combustion engine.According to this invention, adopt gear rack to cooperatively interact the oscillation center position changing rocking arm, change air inlet valve and air outlet valve of internal combustion engine lift thus.But gear rack processed complex, cost is high.In addition, when adopting gear rack work to pay, the part that controlling mechanism comprises is many, thus causes controlling mechanism complex structure, the difficulty that removing manufactures processing greatly outside, functional reliability also decreases.
Summary of the invention
The object of the present invention is to provide a kind of air inlet valve and air outlet valve of internal combustion engine drive unit, this device under the prerequisite of regulatory function keeping air inlet valve and air outlet valve of internal combustion engine, can realize the regulation and control of combustion motor air inlet and exhaust valve lift with simple structure.
For achieving the above object, according to the invention provides a kind of air inlet valve and air outlet valve of internal combustion engine drive unit, comprising cam, rocking arm, also comprising:
Level(l)ing mechanism, described level(l)ing mechanism comprises Level tune part and vertical bounding means, and described Level tune part is movably located between vertical bounding means and rocking arm; With
Vertically modulating mechanism, described vertically modulating mechanism comprises vertical adjusting part and Horizontal limiting groove, and described vertical adjusting part can be arranged in described Horizontal limiting groove relatively movably.
According to the present invention, described cam is positioned at the side of described rocking arm, and described level(l)ing mechanism is positioned at the opposite side of described rocking arm.
According to the present invention, described vertical adjusting part is a variable diameters cylindrical body, its mid diameter is greater than the diameter at two ends, described Horizontal limiting groove be one to be arranged among rocking arm or outside, close or the through slot of part opens, the middle part of described vertical adjusting part is rollably arranged in described Horizontal limiting groove.
According to the present invention, when Horizontal limiting groove is arranged among rocking arm, described rocking arm is a slender body, and its one end is provided with and drives working surface one end to be provided with bearing hole for supporting rollern, and described vertical adjusting part is movably located in described Horizontal limiting groove;
When Horizontal limiting groove is arranged on outside rocking arm, described rocking arm is a slender body, the downside of its one end is provided with driving working surface, its the other end is provided with the bearing hole for supporting described roller, described roller and described vertical adjusting part are coaxially arranged, described roller is rollably resisted against on described cam, and described vertical adjusting part is movably located in the Horizontal limiting groove be arranged at outside rocking arm.
Described vertical adjusting part is a cuboid, is wherein provided with through hole, described Horizontal limiting groove be one to be arranged among rocking arm or outside, close or the through slot of part opens, the vertical adjusting part of described rectangle is slidably located in described Horizontal limiting groove.
According to the present invention, described rocking arm is a slender body, and the downside of its one end is provided with driving working surface, and its other end is provided with the working surface with cam contact, and this other end is provided with through hole, and the vertical adjusting part of rectangle passes through bearing pin rotatably support in Horizontal limiting groove.
According to the present invention, described rocking arm is provided with supporting working surface, described vertical bounding means is provided with spacing working surface, and described Level tune part respectively described supporting working surface and described spacing working surface is arranged between described supporting working surface and described spacing working surface in contact.
According to the present invention, described Level tune part is variable diameters cylindrical body, and is movably located between described supporting working surface and described spacing working surface.
According to the present invention, described supporting working surface and described spacing working surface are the curved surface be parallel to each other.
According to the present invention, described Horizontal limiting groove is the curve bath bending towards Level tune part direction.This curve bath will avoid the relative sliding occurred in the course of the work between rocking arm and air inlet valve and air outlet valve of internal combustion engine valve rod effectively.Owing to avoiding slip, the wearing and tearing therefore between friction pair are effectively reduced, and surface friction drag reduces or avoids, and therefore reduces or eliminates friction power loss.
Regulate owing to present invention employs the simple kinematic pair relatively rolled or slide and limit position and the motion of rocking arm, instead of as prior art, adopt the gear rack of manufacturing complexity to realize regulating, thus enormously simplify the structure of drive unit.Can find out simultaneously, rolling of the present invention or sliding movement auxiliary structure simpler than gear & rack structure, therefore the functional reliability of whole device is high, failure rate is low.In addition, simply easy according to the manufacturing of device of the present invention.
It is few that mechanism of the present invention has part, and requisite space is little, and particularly moving parts is few, and friction pair is few, and thus movement inertia is little needs less driving power, and parts machining is low cost of manufacture simply thus, the advantage that reliability is high.Thus, can install on the engine easily, be conducive to total arrangement on the engine, increase the degrees of freedom of design.Meanwhile, because structure is simple, effectively can ensure that drive unit reliably moves and works, and can reduce manufacture cost effectively, and make to install and maintenance is more simple and easily, and greatly can improve the reliability of system.
Accompanying drawing explanation
Fig. 1 represents the schematic diagram according to the air inlet valve and air outlet valve of internal combustion engine drive unit of embodiment of the present invention;
Fig. 2 represents schematic perspective view according to another implementation of the invention, which show the Horizontal limiting groove of open type;
Fig. 3 represents the schematic perspective view according to another mode of execution of the present invention, wherein represents the Horizontal limiting groove be arranged at outside rocking arm;
Fig. 4 schematically shows the working principle according to drive unit of the present invention;
Fig. 5 represents the drive unit according to another mode of execution of the present invention, comprising the vertical adjusting part of rectangle.
Fig. 6 is according to another implementation of the invention, which show the diverse location of Horizontal limiting groove on rocking arm.
Embodiment
Pin specific description of embodiments of the present invention involved level, vertical, upper and lower, left and right are all with accompanying drawing below, the embodiment that especially shown in accompanying drawing 1, meaning property represents.That is, the substantially horizontal in Fig. 1 is the substantially horizontal in describing, and the Vertical direction in Fig. 1 is the Vertical direction in describing, and in Fig. 1, direction is upwards upper in describing, direction downward in Fig. 1 be in describing under.Level in description, vertical, upper and lower, left and right only clearly understand the specific embodiment of the present invention for convenience of understanding.
Fig. 1 schematically show a mode of execution according to air inlet valve and air outlet valve of internal combustion engine drive unit of the present invention.This drive unit is particularly useful for the motion driving air inlet valve and air outlet valve of internal combustion engine valve rod.
Air inlet valve and air outlet valve of internal combustion engine drive unit shown in Fig. 1 comprises cam 1, rocking arm 2, level(l)ing mechanism 3 and vertically modulating mechanism 6.In the mode of execution shown in Fig. 1, by regulating the lift size of Level tune part 4 in level(l)ing mechanism 3 displacement distance controlling combustion engine air inlet and exhaust valve in left-right direction in the drawings.After adjustment terminates, the position of Level tune part 4 is fixed.Now, when cam 1 rotates, such as, along when counterclockwise rotating in Fig. 1, upwards swing being driven rocking arm 2 right-hand member in FIG by roller 15 for fulcrum with Level tune part 4.And the other end of rocking arm 2, the one end namely with working surface 13 is then counterclockwise in the drawings to lower swing, thus actuate valve stem 16 moves down.Shown in Fig. 1 according to the embodiment of the present invention in, rocking arm 2 with Level tune part 4 for fulcrum is formed a lever.The position of Level tune part 4 is different, causes lever arm length different.Finally cause the stroke of the valve rod 16 corresponding to cam 1 angle of swing different, namely the lift of air inlet valve and air outlet valve of internal combustion engine is different.
In the mode of execution shown in Fig. 1, one end rotatably support of rocking arm 2 has roller 15, and roller 15 is with cam 1 Structure deformation and driven by cam 1, and its other end contacts also actuate valve stem 16 by working surface 13 with air inlet valve and air outlet valve of internal combustion engine valve rod 16.In this embodiment, cam 1 and valve rod 16 are positioned at the same side of rocking arm 2, such as, shown in Fig. 1, are positioned at the below of rocking arm 2.In the mode of execution shown in Fig. 1, the top of rocking arm 2 is provided with level(l)ing mechanism 3, and rocking arm 2 is provided with vertically modulating mechanism 6 near the adjacent one end of cam 1.
According to the embodiment of the present invention, level adjusting structure 3 comprises Level tune part 4 and vertical bounding means 5.The effect of vertical bounding means 5 is limit levels adjusting element 4 position in the vertical direction, i.e. limit levels adjusting element 4 any displacement in the vertical direction, and allows it according to driving instruction top offset in the horizontal direction.Therefore, in the present embodiment, the position of vertical bounding means 5 is fixing.Its lower surface is provided with spacing working surface 12.According to the present invention, spacing working surface 12 is straight, to arrange in the horizontal direction surfaces.And rocking arm 2 is provided with supporting working surface 11 corresponding with it.Be in off working state at device according to the present invention, when that is not driving air inlet valve and air outlet valve of internal combustion engine to work, the distance between supporting working surface 11 and spacing working surface 12 is fixing.Certainly, when device according to the present invention is in running order, because rocking arm 2 is swing in the course of the work, so the distance between above-mentioned supporting working surface 11 and spacing working surface 12 is change.Level tune part 4 is arranged between supporting working surface 11 and spacing working surface 12, roll between two working surfaces under the condition that can contact at two working surfaces when device according to the present invention is in off working state or slide, so that coordinate the constraint of supporting working surface 11 at spacing working surface 12 under, under the driving of the driving mechanism do not represented in the drawings, move along supporting working surface 11.The above-mentioned motion of Level tune part 4, finally realizes the adjustment of combustion motor air inlet and exhaust valve lift.
Mode of execution according to Fig. 1, is also provided with vertically modulating mechanism 6 at rocking arm 2 near one end of cam 1.In the present embodiment, vertically modulating mechanism 6 comprises the through Horizontal limiting groove of of being arranged on rocking arm 27 and is arranged in the vertical adjusting part 9 of this groove.The effect of Horizontal limiting groove 7 is to limit the displacement of vertical adjusting part 9 in FIG in substantially horizontal.In the present embodiment, Horizontal limiting groove 7 is an elongated slot; And vertical adjusting part 9 is a cylindrical body, the preferably cylindrical body of variable diameters, such as a Step Shaft.The part of the roughly intermediate portion of vertical adjusting part 9, preferably largest diameter is arranged in Horizontal limiting groove 7, and the width of its diameter and Horizontal limiting groove 7 matches.Therefore, relative movement in the substantially horizontal that Horizontal limiting groove 7 and vertical adjusting part 9 can not be shown in the figure, can only relative movement in the vertical direction.Due in structure according to the embodiment of the present invention, the position of vertical adjusting part 9 is fixing, so the position of Horizontal limiting groove 7 in FIG on left and right directions is also fixing.According to the present embodiment, again because Horizontal limiting groove 7 is the elongated slots being opened on rocking arm 2, therefore the position of rocking arm 2 in FIG in substantially horizontal is limited by vertical adjusting part 9.But because Horizontal limiting groove 7 is elongated slots, so rocking arm 2 can Vertical direction in the drawings move, namely both can relative movement.According to the present invention, Horizontal limiting groove 7 and vertical adjusting part 9 form a movable kinematic pair coordinated mutually.Realize thus rocking arm 2 location in the horizontal direction, and allow it to move in the vertical direction.Represent in accompanying drawing be one according to the preferred embodiment of the present invention, the function according to Horizontal limiting groove 7 can arrange its position flexibly on rocking arm 2.Under the prerequisite of function realizing Horizontal limiting groove 7, Horizontal limiting groove 7 can not be arranged on rocking arm 2 even, but be arranged on outside rocking arm 2 according to concrete structural condition.This mode specifically describes in mode of execution below.
As shown in Figure 1, owing to arranging Horizontal limiting groove 7 on rocking arm 2, so make the mechanical strength of rocking arm 2 corresponding site reduce.For this reason, stiffening rib can be added in the downside of rocking arm 2 as shown in figure and improve its intensity.In the mode of execution shown in Fig. 1, Horizontal limiting groove 7 is closed elongated slots.The advantage of this structure is that the intensity of whole rocking arm 2 is relatively high.Which thereby enhance the reliability of drive unit.
Fig. 2 further illustrates according to another embodiment of the present invention with the form of stereogram.In this embodiment, Horizontal limiting groove 7 is configured to the through slot that a local is opened wide, and namely its top is unlimited.Certainly, be understandable that, also can open wide towards local, direction downward shown in figure.The advantage of the structure of this mode of execution is that installation, maintenance is convenient.
Fig. 3 schematically illustrates according to another embodiment of the present invention.As shown in Figure 3, cuboid 17 wherein schematically shows and is positioned at outside rocking arm 2, is not namely integrative-structure with rocking arm 2, comprises the fixed block of Horizontal limiting groove 7.Whether practical structures is arranged or to comprise this cuboid 17 unimportant, and what represent is the situation that Horizontal limiting groove 7 is arranged at outside rocking arm 2 herein.In this embodiment, because Horizontal limiting groove 7 is arranged at outside rocking arm 2, so make manufacturing process simplify further, be more conducive to installing and maintenance simultaneously.
According to the present embodiment, roller 15 and vertical adjusting part 9 are coaxially arranged.Namely roller 15 is arranged at centre, and vertical adjusting part 9 arranges its both sides coaxially.This structure further simplify the structure according to air inlet valve and air outlet valve of internal combustion engine drive unit of the present invention, make apparatus structure according to the present invention compacter, manufacture simpler.Simultaneously because Horizontal limiting groove 7 and rocking arm 2 are two parts, it is easier therefore to install and keep in repair.
Fig. 4 schematically illustrates adjustment process according to the embodiment of the present invention further.As shown in Figure 4, the position of Level tune part 4 can be moved along substantially horizontal in figure under the driving of unshowned in the drawings drive unit, thus changes the ratio of lever arm.Equally, when cam 1 is along when counterclockwise rotating in figure, roller 15 also moves in Horizontal limiting groove 7.Different conditions when illustrating adjustment in the mode of dotted line and move in figure and position.Additional Returnning spring is also schematically shown in figure.This Returnning spring is only a kind of selection of optimization, and is not necessary structure.
Fig. 5 schematically illustrates according to another embodiment of the present invention.Can clearly find out from figure, supporting working surface 11 and spacing working surface 12 are not planes, but curved surface.As can be seen from the figure, two curved surfaces are arranged each other abreast.Arrange like this and can increase design freedom further, to facilitate the setting carrying out combustion motor air inlet and exhaust valve lift.Certain this curved surface can be bent upwards as shown by the solid line in the drawings, also can be bent downwardly as shown in phantom in FIG..
Equally as shown on the right side of Fig. 5, vertical adjusting part 9 also can be a rectangular-shaped piece, which is provided with through hole 18.A bearing pin 20 passes and provides supporting to it from through hole 18.Rectangular-shaped piece can rotate on bearing pin 20, realizes the kinematic constraint to rocking arm 2 thus.Although not represent in figure but certainly conceivable, when Horizontal limiting groove 7 is arranged on rocking arm 2, vertical adjusting part 9 still also can have the profile of rectangle.
Can also see from accompanying drawing 5, in this embodiment, one end that rocking arm 2 is close with cam 1 not arrange roller 15, but replaces a working surface 19.Working surface 19 is directly resisted against on cam 1.In the present embodiment, when cam 1 rotates, directly rocking arm 2 is driven to move by the working surface 19 on rocking arm 2.This structure is more simple undoubtedly, and therefore manufacture cost is lower, installs and keep in repair convenient, and the reliability of work is also correspondingly higher.
According to another preferred embodiment of the present invention as shown in Figure 6.In this embodiment, Horizontal limiting groove 7 and the vertical adjusting part 9 that coordinates with it are arranged left side in the drawings, namely near the side of air inlet valve and air outlet valve of internal combustion engine valve rod.In this embodiment, be identical according to the working principle of drive unit of the present invention and Principles of Regulation with other mode of executions above-described, difference is that the position of Horizontal limiting groove 7 on rocking arm 2 is different.As can be seen here, Horizontal limiting groove 7 can be arranged on the diverse location on rocking arm 2 as required, but its effect realized is identical with aforementioned embodiments with function.
According to another implementation of the invention, be no matter the Horizontal limiting groove 7 be arranged on rocking arm 2 according to Fig. 1 or Fig. 6, or the Horizontal limiting groove 7 be arranged on outside rocking arm 2 according to Fig. 3 or 4, be all a curve bath.That is, the inwall of groove is bending camber line, and relative inwall bends in parallel to each other.This bending curve bath, can avoid, when drive unit work according to the present invention, occurring sliding between the valve rod 16 of rocking arm 2 and air inlet and exhaust valve.Owing to avoiding slip, therefore significantly reduce wearing and tearing.This operating life that will effectively extend according to device of the present invention.
Claims (10)
1. an air inlet valve and air outlet valve of internal combustion engine drive unit, comprises cam (1), and rocking arm (2), is characterized in that, also comprise:
Level(l)ing mechanism (3), described level(l)ing mechanism (3) comprises Level tune part (4) and vertical bounding means (5), and described Level tune part (4) is movably located between vertical bounding means (5) and rocking arm (2); With
Vertically modulating mechanism (6), described vertically modulating mechanism (6) comprises vertical adjusting part (9) and Horizontal limiting groove (7), and described vertical adjusting part (9) can be arranged in described Horizontal limiting groove (7) relatively movably.
2. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 1, is characterized in that, described cam (1) is positioned at the side of described rocking arm (2), and described level(l)ing mechanism (3) is positioned at the opposite side of described rocking arm (2).
3. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 1 and 2, it is characterized in that, described vertical adjusting part (9) is a variable diameters cylindrical body, its mid diameter is greater than the diameter at two ends, described Horizontal limiting groove (7) be one to be arranged among rocking arm (2) or outside, close or the through slot of part opens, the middle part of described vertical adjusting part (9) is rollably arranged in described Horizontal limiting groove (7).
4. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 3, it is characterized in that, when Horizontal limiting groove (7) is arranged among rocking arm (2), described rocking arm (2) is a slender body, its one end is provided with and drives working surface (13), its the other end is provided with the bearing hole (14) for supporting rollern (15), and described vertical adjusting part (9) can be arranged in described Horizontal limiting groove (7) relatively movably;
When Horizontal limiting groove (7) is arranged on outside rocking arm (2), described rocking arm (2) is a slender body, the downside of its one end is provided with and drives working surface (13), its the other end is provided with the bearing hole (14) for supporting described roller (15), described roller (15) and described vertical adjusting part (9) are coaxially arranged, described roller (15) is rollably resisted against on described cam (1), and described vertical adjusting part (9) is movably located in the Horizontal limiting groove (7) be arranged at outside rocking arm (2).
5. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 1 and 2, it is characterized in that, described vertical adjusting part (9) is a cuboid, wherein be provided with through hole (18), described Horizontal limiting groove (7) be one to be arranged among rocking arm (2) or outside, close or the through slot of part opens, the vertical adjusting part (9) of described rectangle can be arranged in described Horizontal limiting groove (7) relative sliding.
6. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 5, it is characterized in that, described rocking arm (2) is a slender body, the downside of its one end is provided with and drives working surface (13), its the other end is provided with the working surface (19) contacted with cam (1), this the other end is provided with through hole (18), the vertical adjusting part (9) of rectangle by bearing pin (20) rotatably support in Horizontal limiting groove (7).
7. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 1 and 2, it is characterized in that, described rocking arm (2) is provided with supporting working surface (11), described vertical bounding means (5) is provided with spacing working surface (12), when described drive unit is in off working state, described supporting working surface (11) is oppositely arranged with constant spacing and described spacing working surface (12).
8. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 7, is characterized in that, described Level tune part (4) is variable diameters cylindrical body, and is movably located between described supporting working surface (11) and described spacing working surface (12).
9. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 7, is characterized in that, described supporting working surface (11) and described spacing working surface (12) curved surface for being parallel to each other.
10. air inlet valve and air outlet valve of internal combustion engine drive unit according to claim 1, is characterized in that, described Horizontal limiting groove (7) is the curve bath bending towards Level tune part (4) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101924.5A CN104775866A (en) | 2015-03-09 | 2015-03-09 | Driving device for suction and exhaust valve of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101924.5A CN104775866A (en) | 2015-03-09 | 2015-03-09 | Driving device for suction and exhaust valve of internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN104775866A true CN104775866A (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510101924.5A Pending CN104775866A (en) | 2015-03-09 | 2015-03-09 | Driving device for suction and exhaust valve of internal combustion engine |
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| CN (1) | CN104775866A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000885A1 (en) * | 2018-06-25 | 2020-01-02 | 常州机电职业技术学院 | Continuously variable valve lift device for piston internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020134329A1 (en) * | 2001-03-23 | 2002-09-26 | Entzminger William W. | Variable fulcrum rocker arm |
| GB2451448A (en) * | 2007-07-28 | 2009-02-04 | Anthony Edgar Blackburn | Variable fulcrum position for inlet valve actuation in 8-stroke engines |
| CN204663607U (en) * | 2015-03-09 | 2015-09-23 | 常州嵘驰发动机技术有限公司 | Air inlet valve and air outlet valve of internal combustion engine drive unit |
-
2015
- 2015-03-09 CN CN201510101924.5A patent/CN104775866A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020134329A1 (en) * | 2001-03-23 | 2002-09-26 | Entzminger William W. | Variable fulcrum rocker arm |
| GB2451448A (en) * | 2007-07-28 | 2009-02-04 | Anthony Edgar Blackburn | Variable fulcrum position for inlet valve actuation in 8-stroke engines |
| CN204663607U (en) * | 2015-03-09 | 2015-09-23 | 常州嵘驰发动机技术有限公司 | Air inlet valve and air outlet valve of internal combustion engine drive unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020000885A1 (en) * | 2018-06-25 | 2020-01-02 | 常州机电职业技术学院 | Continuously variable valve lift device for piston internal combustion engine |
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Application publication date: 20150715 |