CN102400733B - Variable Air Valve System For Combustion Motor - Google Patents
Variable Air Valve System For Combustion Motor Download PDFInfo
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- CN102400733B CN102400733B CN201110259801.6A CN201110259801A CN102400733B CN 102400733 B CN102400733 B CN 102400733B CN 201110259801 A CN201110259801 A CN 201110259801A CN 102400733 B CN102400733 B CN 102400733B
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- transmission lever
- connecting pin
- central axis
- rocking arm
- push rod
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Abstract
Provided is a variable air valve system for a combustion motor. In the variable air valve system, a pressing force transmission member at least comprises a push rod. A housing of a pressing force producing source is installed to an engine body. The pressing force transmission member is designed for slidingly connected with one end of one of the connecting pins located at one end along the axial direction. The connecting pins are pressed by a side spring toward the axial direction in a tilted manner and are mutually contacted, thereby allowing axial motion between the connecting position where adjacent rocker arms are connected and the breaking position where the connection is broken. A pressing force transmission device includes: a push rod supported on the housing; and a transmission rod slidingly supported on the engine body or a support member. One end of the transmission rod is contacted with the push rod, and the transmission rod is arranged to be slindingly contacted with one end of the connecting pins which are arranged at one end side in the axial direction. The contact surface of the pressing portion used for contacting with the sliding contact surface of the side end portion of the pressing port formed at the rod form a spherical shape.
Description
The cross reference of related application
This application claims the preference of the Japanese patent application No.2010-221406 that the Japanese patent application No.2010-199666 and 2010 that submits on September 7th, 2010 submits 30, on September, their full content is incorporated to this paper by reference.
Technical field
The present invention relates to a kind of variable valve system for internal-combustion engine, wherein, multiple connecting pin is slidably assemblied in multiple rocking arm, described multiple connecting pin is carried out spring-biased towards side axially and is contacted with each other, thus allow the link position that adjacent rocking arm is connected and for remove described connection off position between along described axial motion, described multiple rocking arm is arranged adjacent to each other and is comprised and is connected and the rocking arm operation associated with engine valve with engine valve, and pressing force transfer unit is configured to one end sliding contact with the described connecting pin of end side axially described in being positioned in described multiple connecting pin, the pressing force from pressing force occurring source is made to be applied on described multiple connecting pin towards described opposite side axially, described pressing force transfer unit at least comprises push rod, this push rod forms a part for described pressing force occurring source, described pressing force occurring source has the housing being installed to engine body.
In addition, the present invention relates to a kind of variable valve system for internal-combustion engine, wherein, multiple connecting pin comprises specific connecting pin, this specific connecting pin is slidably assembled to the rocking arm being positioned at one end place in arranged direction in multiple rocking arms disposed adjacent one another, described multiple connecting pin is slidably assemblied in described multiple rocking arm and also contacts each other, thus allow to move with for removing between the described off position be connected at the link position for making adjacent rocking arm connect, and coaxially to connect with described specific connecting pin and the shaft-like press part operation associated with it is caused and contacts with a bar, described bar is for transmitting the pressing force from actuator, described actuator is along the direction operation parallel with the direction of operating of described connecting pin.
Background technique
Known in the variable valve system of internal-combustion engine, solenoidal push rod as the pressing force occurring source being installed to engine body is configured to directly contact with the connecting pin of the end side be positioned at axially in multiple connecting pin, thus directly promotes connecting pin by push rod.For example, see Japanese Patent Laid-Open 4-292526.
Connecting pin is the parts swung together with rocking arm.In the structure that push rod and connecting pin directly contact in variable valve system disclosed in Japanese Patent Laid-Open 4-292526 as above, one end sliding contact of push rod and the connecting pin swung together with rocking arm.Due to the friction between push rod and connecting pin, this can cause being used on push rod along the masterpiece of bending direction, and this power is applied on pressing force generating means.Therefore, the supporting structure of the push rod in pressing force generating means can be very complicated.
In addition, disclosed in Japanese Patent Laid-Open 4-292526 in the variable valve system of internal-combustion engine, arrange actuator being slidably assembled on the extension being positioned at the axis of the connecting pin of the rocking arm at one end place in arranged direction in multiple rocking arm.The pressing force produced from actuator is applied to connecting pin by bar, switches the connection of multiple rocking arm whereby and removes this connection, thus changes the operating characteristics of engine valve.
But although the connecting pin being slidably assembled to rocking arm swings along with the swing of rocking arm, it is along fixing with the position in the direction of the axis vertical take-off of the bar for transmitting the pressing force from actuator, thus the end face sliding contact of connecting pin and bar.As a result, the maintenance operation cycle of connecting pin may shorten because of wearing and tearing (abrasion), or amount of actuator travel becomes not enough, thus causes controlling the switching between the connection of rocking arm and disconnection unfavourably.
Summary of the invention
Consider above-mentioned situation and make the present invention.Therefore, the object of embodiments of the present invention is to provide a kind of variable valve system for internal-combustion engine, to simplify the supporting structure of push rod in pressing force generating means.
To achieve these goals, according to the embodiment of the present invention, for a kind of variable valve system for internal-combustion engine, wherein, multiple connecting pin is slidably assemblied in multiple rocking arm, described multiple connecting pin is carried out spring-biased towards side axially and is contacted with each other, thus allow the link position that adjacent rocking arm is connected and for remove described connection off position between along described axial motion, described multiple rocking arm is arranged adjacent to each other and is comprised and is connected and the rocking arm operation associated with engine valve with engine valve, and pressing force transfer unit is configured to one end sliding contact with the described connecting pin of end side axially described in being positioned in described multiple connecting pin, the pressing force from pressing force occurring source is made to be applied on described multiple connecting pin towards described opposite side axially, described pressing force transfer unit at least comprises push rod, this push rod forms a part for described pressing force occurring source, described pressing force occurring source has the housing being installed to engine body, wherein said pressing force transfer unit comprises: supporting described push rod on the housing, and transmission lever, this transmission lever is slidably supported on described engine body or described supporting part, one end of this transmission lever contacts with described push rod, and described transmission lever be configured to be positioned at described in one end sliding contact of described connecting pin of end side axially.
According to the embodiment of the present invention, bar supporting portion and cylinder head for slidably supporting described transmission lever are integrally formed, described cylinder head forms a part for described engine body and supports described engine valve, thus described engine valve can be opened and closed.
According to the embodiment of the present invention, described bar supporting portion and described cylinder head are integrally formed, wherein said transmission lever be positioned at described housing side relative to the fitting surface between described cylinder head and the housing being connected to this cylinder head at least partially.
According to the embodiment of the present invention, described bar supporting portion and holding part one are formed continuously, and described holding part and described cylinder head are integrally formed for assembling and supporting the end of pitman arm shaft, and described pitman arm shaft is for supporting described rocking arm in swingable mode.
According to the embodiment of the present invention, be extruded with rib integratedly from the internal surface of described housing, described rib be used for towards the area side between adjacent described rocking arm and described transmission lever be positioned at described in the contact surface side oil dripping of described connecting pin of end side axially.
According to the embodiment of the present invention, the described transmission lever length be supported on described engine body is greater than the sliding stroke of the described transmission lever of operation along with described pressing force occurring source.
According to the embodiment of the present invention, cover for covering described housing is installed to described engine body, one end place of described push rod is provided with lip part, this lip part by with described body contact and limit described push rod along the stroke promoted towards described opposite side axially on the direction of described multiple connecting pin, and be fixed with damping material on the surface towards described lip part of described cover, when making described push rod move towards the side making described lip part away from described housing, described damping material contacts with described lip part.
According to the embodiment of the present invention, described pressing force transfer unit comprises: supporting described push rod on the housing; Transmission lever, this transmission lever is slidably supported on described engine body or described supporting part, and be configured to be positioned at described in one end sliding contact of described connecting pin of end side axially; And damping material, this damping material is folded between described transmission lever and described push rod.
In addition, intake valve 23 in the following embodiments corresponds to described engine valve, the first air inlet side rocking arm 32 in mode of execution and the second air inlet side rocking arm correspond to described rocking arm, air inlet side pitman arm shaft 39 in mode of execution corresponds to described pitman arm shaft, the first holding part 45 in mode of execution corresponds to described holding part, and solenoid 62A and 62B in mode of execution corresponds to described pressing force occurring source.
According to the embodiment of the present invention, the intermediate portion of described pressing force transfer unit be slidably supported on described engine body or be supported on be fixed on described engine body supporting part on.Therefore, guarantee that the power along bending direction produced because of one end sliding contact with the connecting pin swung together with rocking arm can not be applied in the supporting structure of the push rod in the housing of described pressing force occurring source, the supporting structure of the push rod in described housing can be simplified whereby.
According to the embodiment of the present invention, the transmission lever be slidably supported on described engine body or on described supporting part be folded in the described push rod of described pressing force occurring source and described multiple connecting pin between the connecting pin of described end side axially.Therefore, the connecting pin swung together with described rocking arm and described transmission lever sliding contact, thus can not act on described push rod along the power of bending direction.Therefore, it is possible to be reduced at the supporting structure of the described push rod in the described housing of described pressing force occurring source, and the positional accuracy be arranged on by described pressing force occurring source on described engine body can be reduced.
According to the embodiment of the present invention, described transmission lever is slidably supported on the bar supporting portion that is integrally formed with described cylinder head.Therefore, without the need to the particular elements for supporting described transmission lever, the quantity of parts can be reduced whereby.Therefore, it is possible to strengthen the machining accuracy of the bar supporting portion for supporting transmission lever.
According to the embodiment of the present invention, described bar supporting portion and described cylinder head are integrally formed, and what make described transmission lever is positioned at described housing side relative to the fitting surface between described cylinder head and described housing at least partially.Therefore, it is possible to be convenient to assemble described transmission lever when described housing is dismantled from described cylinder head, drillability rate can be strengthened whereby.
According to the embodiment of the present invention, the end of pitman arm shaft is assembled and is supported in the holding part that is integrally formed with described cylinder head, and described bar supporting portion and described holding part one are formed continuously.Therefore, for assemble and the periphery supporting the pilot hole of described pitman arm shaft can be strengthened by described bar supporting portion.
According to the embodiment of the present invention, oil from the outstanding rib of the internal surface of described housing one towards the region between adjacent rocking arm and described transmission lever low with the surface of contact of the described connecting pin being positioned at one end axially.Therefore, it is possible to oil is caused the region between adjacent rocking arm and causes transmission lever and the contact surface of connecting pin being positioned at one end place axially, and without the need to configuring complicated oil channel structures.Therefore, it is possible to realize alleviating of the weight of cylinder head and housing.
According to the embodiment of the present invention, the sliding stroke that slided by the operation of pressing force occurring source than described transmission lever by the length of described engine body or described support member supports of described transmission lever is long.Therefore, it is possible to guarantee to support transmission lever, guarantee to prevent from, between described transmission lever and described engine body or described supporting part, scratching occurs simultaneously.
According to the embodiment of the present invention, in one end through housing of described push rod, axially movable mode is provided with lip part, this lip part is for limiting described push rod along the stroke promoting the direction of described multiple connecting pin towards described opposite side axially, and be fixed with damping material on the described cover covering described pressing force occurring source, described damping material can contact with described lip part.Therefore, contacted with described damping material by the described push rod promoted from described connecting pin side, prevent described push rod from rebounding in opposite direction whereby, and in addition, the gimp produced with described pushrod movement can be suppressed.
According to the embodiment of the present invention, described damping material is folded between described push rod and described transmission lever.This guarantees to suppress to produce gimp between described push rod and described transmission lever.
According to the embodiment of the present invention, provide the variable valve system for internal-combustion engine, to strengthen the abrasion resistance of the area of contact between press part and bar.
To achieve these goals, embodiments of the present invention provide a kind of variable valve system for internal-combustion engine, wherein, multiple connecting pin comprises specific connecting pin, this specific connecting pin is slidably assembled to the rocking arm being positioned at one end place in arranged direction in multiple rocking arms disposed adjacent one another, described multiple connecting pin is slidably assemblied in described multiple rocking arm and also contacts each other, thus allows to move with for removing between the described off position be connected at the link position for making adjacent rocking arm connect.Coaxially to connect with described specific connecting pin and the shaft-like press part operation associated with it is caused and contacts with a bar, described bar is for transmitting the pressing force from actuator, described actuator along the direction operation parallel with the direction of operating of described connecting pin, wherein said press part be formed as spherical for the surface of contact contacted with the sliding contact surface being formed in the end of side, described press part of described bar.
According to the embodiment of the present invention, the central axis of described press part is arranged to offset from the central axis of described bar.
According to the embodiment of the present invention, the distance between the central axis of described pitman arm shaft and the central axis of described bar is set to be greater than for the distance slidably supported between the central axis of the pitman arm shaft of described multiple rocking arm and the central axis of described press part.
According to the embodiment of the present invention, described bar is supported on the bar supporting portion that is arranged on engine body, thus can to rotate and can axial motion, described bar supporting portion is provided with oilhole, and this oilhole is used for the region supplying lubricating oil between described bar supporting portion and described bar.
According to the embodiment of the present invention, be integrally formed with flange shape contacting part in the described end being positioned at side, described press part of described bar in the mode that radially outward is outstanding, this flange shape contacting part is formed with described sliding contact surface.
According to the embodiment of the present invention, described sliding contact surface is formed as even shape.
According to the embodiment of the present invention, described sliding contact surface is formed, make in the projection in the plane orthogonal with the central axis of described press part and the central axis of described bar, the described press part swung together with the rocking arm at one end place in described arranged direction in described multiple rocking arm is given prominence to from described sliding contact surface in a part for its hunting range.
According to the embodiment of the present invention, the output shaft that described actuator has is caused the end contact with the opposition side of described sliding contact surface, and the central axis of described output shaft is arranged to offset from the central axis of described bar, and offset direction is identical with the direction that the central axis of described bar offsets from the central axis of described press part.
In addition, the first connecting pin 55 in mode of execution is corresponding with the specific connecting pin in the present invention.Solenoid 62 in mode of execution is corresponding with the actuator in the present invention, and the transmission lever 66 in mode of execution should with the pole pair in the present invention.
According to the embodiment of the present invention, the shape for the surface of contact contacted with the sliding contact surface of bar of press part is spherical, thus described press part utilizes described surface of contact to form point cantact, and area of contact is reduced.This makes it possible to the area reducing sliding contact surface, thus the size of bar and weight can be made to reduce.And even if the central axis of described press part tilts relative to the central axis of described bar, peripheral collision also can not be carried out with described sliding contact surface in described press part, thus can strengthen abrasion resistance.In addition, the bar side end face of the press part swung relative to described rocking arm is formed as sphere, can alleviate the weight of described rocking arm whereby, strengthen its abrasion resistance simultaneously.
According to the embodiment of the present invention, the central axis of described press part is arranged to offset from the central axis of described bar.This guarantees that the power for making bar rotate is applied in described bar from the press part swung together with described rocking arm.Therefore, it is possible to prevent concentrated wear, reduce the wearing and tearing of sliding contact surface simultaneously.
According to the embodiment of the present invention, the distance between the central axis of pitman arm shaft and the central axis of press part is greater than the distance between the central axis of rocking arm and the central axis of bar.Therefore, the central axis of described press part is through the circular arc in the outside of the central axis of bar relative to the swinging track of the described sliding contact surface of described bar.Thus by effectively utilizing the space of sliding contact surface, this press part contacts with sliding contact surface, the area of sliding contact surface can be reduced whereby further, and the size of described bar and weight can be made to reduce.In addition, the power for making described bar rotate can being increased further, the rotation of bar can be promoted whereby further.
According to the embodiment of the present invention, for enable described bar rotate and the bar supporting portion that mode supports described bar is in axial sliding provided with for the oilhole to the region supplying lubricating oil between bar supporting portion and bar.Therefore, it is possible to strengthen the rotation of bar further.
According to the embodiment of the present invention, the flange shape contacting part being formed with sliding contact surface is arranged on bar in the mode that the end radially outward being arranged in side, press part from bar is outstanding.Therefore, it is possible to the anti-stopping bar simultaneously that alleviates realizing the weight of bar, from the slippage of bar supporting portion, increases the area of sliding contact surface simultaneously.
According to the embodiment of the present invention, the shape of sliding contact surface is smooth.Therefore, no matter how rotating of bar can make the path increment of bar constant, and can guarantee the machinability of sliding contact surface better.
According to the embodiment of the present invention, sliding contact surface is formed press part is given prominence to from sliding contact surface in a part for its hunting range.Therefore, it is possible to reduce the area of sliding contact surface further, guarantee that press part contacts really with sliding contact surface simultaneously.
In addition, according to the embodiment of the present invention, the central axis of the described output shaft of described actuator is configured to offset from the central axis of bar, and offset direction is identical with the direction that the central axis of described bar offsets from the central axis of described press part.Therefore, the rotation of described bar is facilitated.In addition, when described actuator and described bar supporting portion being arranged in the state departed from towards the side of engine body, the space for effectively arranging other parts can be guaranteed.
Will clearer other application area of the present invention from detailed description provided below.But, although should be understood that and show the preferred embodiment of the present invention, detailed description and specific embodiment only provide by way of illustration, because from this detailed description, those skilled in the art will know the variations and modifications in the spirit and scope of the present invention.
Accompanying drawing explanation
From detailed description provided below and accompanying drawing by comprehend the present invention, accompanying drawing only provides by way of illustration, does not therefore limit the present invention, in accompanying drawing:
Fig. 1 is the longitudinal section of the major component of internal-combustion engine according to first embodiment of the invention;
Fig. 2 is the planimetric map taken along the line 2-2 of the band arrow of Fig. 1;
Fig. 3 be when air inlet side rocking arm is in off state along the sectional view of the line 3-3 of Fig. 1;
Fig. 4 is the enlarged view of the part represented by the arrow 4 of Fig. 3;
Fig. 5 is the sectional view corresponding with Fig. 3, shows the second mode of execution;
Fig. 6 is the planimetric map taken along the line 2-2 of the band arrow of Fig. 1;
Fig. 7 be when air inlet side rocking arm is in off state along the sectional view of the line 3-3 of Fig. 1;
Fig. 8 is the enlarged view of the major component represented by the arrow 4 of Fig. 7;
Fig. 9 is the sectional view taken along the line 5-5 of Fig. 8; And
Figure 10 is the sectional view corresponding with Fig. 9, shows another mode of execution.
Embodiment
Now, with reference to the accompanying drawings embodiments of the present invention are described hereinafter.
With reference to Fig. 1 to Fig. 4, the first mode of execution of the present invention is described.First, in FIG, this internal-combustion engine such as can be mounted in the mini engine on motorcycle.The engine body 10 of this internal-combustion engine comprises: cylinder block 11, and this cylinder block has cylinder-bore 12, and piston 13 is assemblied in this cylinder-bore slidably; Cylinder head 15, this cylinder head is connected with cylinder block 11, makes to limit firing chamber 14 between this cylinder head and cylinder block 11, and the top surface of piston 13 is to this firing chamber; And housing 16, this housing is connected with cylinder head 15, makes to limit valve cage 17 between this housing and cylinder head 15.
Cylinder head 15 is provided with the suction port 18 and relief opening 19 that are communicated with firing chamber 14.The gas handling system 21 with Fuelinjection nozzle 20 is connected with suction port 18, and vent systems (not shown) is connected with relief opening 19.
With reference to Fig. 2, single exhaust valve 24 and a pair intake valve 23,23 as engine valve is arranged in cylinder head 15, make these valves can the opening and closing by operating, this switches between cutting off relative to the connected sum of firing chamber 14 at suction port 18 intake valve 23,23, and exhaust valve 24 switches between cutting off relative to the connected sum of firing chamber 14 at relief opening 19.Intake valve 23 by valve spring 25 along valve-closing direction bias voltage, and exhaust valve 24 by valve spring 26 along valve-closing direction bias voltage.In addition, cylinder head 15 is equipped with a pair spark plug 27 and 28, and the front-end face of spark plug 27 and 28 is to firing chamber 14.
Also with reference to Fig. 3, accommodate valve system 30 in the valve cage 17 limited between cylinder head 15 and housing 16, this valve system is for driving intake valve 23 and exhaust valve 24 thus making these valves open and close.
Valve system 30 comprises: single camshaft 31, this cam shaft arrangement between intake valve 23 and exhaust valve 24, as the camshaft of intake valve 23 and the public use of exhaust valve 24; Be folded in the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33 between described a pair intake valve 23 and camshaft 31; And the exhaust side rocking arm 34 be folded between exhaust valve 24 and camshaft 31.
The intermediate portion of exhaust side rocking arm 34 is supported swingably by exhaust side pitman arm shaft 35, and the axis being parallel of this exhaust side pitman arm shaft is in camshaft 31.Roller 37 and exhaust side cams 36 Structure deformation be arranged on camshaft 31, this roller is rotatably supported on an end of exhaust side rocking arm 34.The tappet screw 38 contacted with the rod end 24a of exhaust valve 24 engages with another end thread of exhaust side rocking arm 34, thus can regulate the advance and retreat position of tappet screw.
First air inlet side rocking arm 32 and the second air inlet side rocking arm 33 juxtaposition adjacent to each other on the axial direction of camshaft 31, and supported swingably by air inlet side pitman arm shaft 39, the axis being parallel of this air inlet side pitman arm shaft is in exhaust side pitman arm shaft 35.The tappet screw 40,40 contacted with the rod end 23a of intake valve 23 engages with the side end thread of the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33, thus can regulate the advance and retreat position of tappet screw 40,40.In addition, be rotatably supported in the end side of the first air inlet side rocking arm 32 with the roller 41 of teat 43 Structure deformation that stops be arranged on camshaft 31.In addition, be rotatably supported in the end side of the second air inlet side rocking arm 33 with the roller 42 of air inlet side cam 44 Structure deformation be arranged on camshaft 31.
Camshaft 31 is rotatably supported on from the first outstanding holding part 45 of cylinder head 15 one and the second holding part 46 by ball bearing 47 and 48, and the first holding part and the second holding part are in along under the state that the direction of the axis of camshaft 31 is arranged in isolated position.Driven sprocket 50 is firmly attached to the end outstanding from the second holding part 46 in two ends of camshaft 31, this driven sprocket forms a part for timing transfer mechanism 49, and the rotating power for the bent axle (not shown) by being connected to piston 13 is delivered to camshaft 31 with 1/2 speed reducing to raw velocity.In addition, the cam chain 51 of a part for timing transfer mechanism 49 is formed around driven sprocket 50.
In addition, air inlet side pitman arm shaft 39 and exhaust side pitman arm shaft 35 are arranged in the both sides of camshaft 31.Two each ends in air inlet side pitman arm shaft 39 and exhaust side pitman arm shaft 35 are assembled to the first holding part 45 and the second holding part 46 respectively and are supported by this first holding part and the second holding part respectively.
In addition, air inlet side cam 44 comprises: circular arc basic circle portion 44a, and this circular arc basic circle portion is along the imaginary circle on the central axis being centrally located at camshaft 31; And cam protrusion 44b, the two end part in the circumference of this cam protrusion and basic circle portion 44a protrude outwardly into outside imaginary circle continuously.On the other hand, it is such parts that body stops teat 43, this part can by two intake valves 23,23 be connected with the first air inlet side rocking arm 32 and the intake valve 23 operation associated with this first air inlet side rocking arm is placed in valve closure dormant state.Body stops teat 43 and is formed with such outer circumferential face, this outer circumferential face is essentially roughly along the circle of imaginary circle, but be configured to intake valve 23 to open to minimum degree, thus prevent that fuel accumulates when intake valve 23 is placed in complete valve closure state of rest.In other words, the cam 43 that stops forms the cam configuration different from the cam configuration of air inlet side cam 44, can be placed in valve closure state of rest simultaneously.
First air inlet side rocking arm 32 and the second air inlet side rocking arm 33 are provided with air door operation characteristic change device 54, this air door operation characteristic change device is for switching between the state when state when the low-speed handing of internal-combustion engine and the high speed operation at internal-combustion engine, when the low-speed handing of internal-combustion engine, roller 41 and the body of the first air inlet side rocking arm 32 stop teat 43 and keep Structure deformation, and have nothing to do with the second air inlet side rocking arm 33 swung with air inlet side cam 44, thus guarantee that the intake valve 23 of side is placed in valve closure state of rest, and the intake valve 23 of opposite side opens and closes under the operator scheme of the cam configuration according to air inlet side cam 44, when the high speed operation of internal-combustion engine, the first air inlet side rocking arm 32 is connected with the second air inlet side rocking arm 33 thus guarantees that two intake valves 23 open and close under the operator scheme of the cam configuration according to air inlet side cam 44.
With reference to Fig. 4, air door operation characteristic change device 54 is arranged on the top place of the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33, between air inlet side pitman arm shaft 39 and camshaft 31.Air door operation characteristic change device 54 has the first connecting pin 55 and the second connecting pin 56, this first connecting pin and the second connecting pin are slidably assembled to the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33 also contacts with each other in the following manner, that is, allow the link position for making the first air inlet side rocking arm 32 and the second rocking arm 33 connect and for remove connection off position between axial motion.
First air inlet side rocking arm 32 is provided with the first bullport 57 being formed as Bottom Shape, and this first bullport has end wall 57a in the side contrary with the second air inlet side rocking arm 33, and the axis being parallel of the first bullport 57 is in air inlet side pitman arm shaft 39.Second air inlet side rocking arm 33 is provided with the second bullport 58 being formed as Bottom Shape, and this second bullport ends at end wall 58a in the side contrary with the first air inlet side rocking arm 32, and the axis being parallel of the second bullport 58 is in air inlet side pitman arm shaft 39.And the first bullport 57 and the second bullport 58 are formed as equal diameters, thus continuous coaxially to each other when intake valve 23 is in closed condition.
The first connecting pin 55 being formed as short solid post shape is assemblied in the first bullport 57 slidably, and a part for this first connecting pin can be assembled in the second bullport 58.The axle portion 55a be assemblied in slidably in the through hole 59 in the central part being arranged at end wall 57a is arranged to be integrally formed with the first connecting pin 55 and coaxial with this first connecting pin 55 continuously.
The first connecting pin 55 as specific connecting pin is slidably assemblied in the first air inlet side rocking arm 32 being arranged in one end place in arranged direction in the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33.The first connecting pin 55 being formed as solid cylindrical is assemblied in the first bullport 57 slidably, and a part for this first connecting pin can be assembled in the second bullport 58.In addition, treat to be connected with the first connecting pin 55 by the shaft-like press part 55a in the through hole 59 that is assemblied in slidably in the central part being formed at end wall 57a, and operation associated with this first connecting pin 55.In this embodiment, press part 55a and the first connecting pin 55 one are continuously and formed coaxially.
In addition, the second connecting pin 56 has been formed as bottom tube-like, and this has bottom tube-like to open wide in the end wall 58a side of the second bullport 58.The first connecting pin 55 contacted with each other for court's side (right side of Fig. 3 and 4) bias voltage vertically and the spring 60 of the second connecting pin 56 are folded in end wall 58a and are assemblied in slidably between the second connecting pin 56 in the second bullport 58.End wall 58a is provided with perforate 61.
A part for first connecting pin 55 is assemblied in the second bullport 58 by the elastic force overcoming spring 60 and the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33 is interconnected by air door operation characteristic change device 54.In addition, air door operation characteristic change device 54 by making the first connecting pin 55 and the second connecting pin 56 move vertically by the elastic force of spring 60 until the contact surface of the first connecting pin 55 and the second contact pin 56 is disposed between the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33, thus removes the connection between the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33.
For the one end being positioned at the axle portion 55a of the first connecting pin 55 of end side vertically in the first connecting pin 55 and the second connecting pin 56, pressing force transfer unit 65A at least comprises push rod 64A, this push rod 64A forms the part as the solenoid 62A of pressing force occurring source, solenoid 62A has the housing 63 being installed to engine body 10, this pressing force transfer unit 65A is configured to and one end sliding contact being positioned at the axle portion 55a of the first connecting pin 55 of end side vertically in the first connecting pin 55 and the second connecting pin 56, pressing force from solenoid 62A is applied on the first connecting pin 55 and the second connecting pin 56 towards opposite side vertically.
The housing 63 of solenoid 62A is installed to cylinder head 15 and the housing 16 of engine body 10 by mounting plate 67.Housing 63 and mounting plate 67 pass through jointly fastening by multiple bolt 68 and are installed to cylinder head 15 and housing 16.
In the cylinder head 15 that the intermediate portion of pressing force transfer unit 65A is supported on engine body 10 slidably or be supported on slidably be fixed on cylinder head 15 supporting part on.In this first mode of execution, the intermediate portion of pressing force transfer unit 65A is supported on the 45a of bar supporting portion slidably, and the first holding part 45 one of this bar supporting portion 45a and cylinder head 15 is formed continuously.
In the first embodiment, pressing force transfer unit 65A comprises: push rod 64A, and this push rod forms a part of solenoid 62A, and is bearing on housing 63; And transmission lever 66, this transmission lever is supported on the 45a of bar supporting portion slidably, and one end contacts with push rod 64A, and is configured to one end sliding contact with the axle portion 55a of the first connecting pin 55.
And bar supporting portion 45a and cylinder head 15 form, what make transmission lever 66 is positioned at housing 16 side relative to the fitting surface 69 between cylinder head 15 and housing 16 at least partially.In this first mode of execution, the first holding part 45 of bar supporting portion 45a and cylinder head 15 forms, and the axis of transmission lever 66 is positioned on fitting surface 69 in side view.In addition, the first holding part 45 has been provided with end pilot hole 70(see Fig. 3), an end of air inlet side pitman arm shaft 39 is assembled and is supported in this pilot hole.Bar supporting portion 45a is integrally formed continuously in the upside of pilot hole 70 and the first holding part 45.In addition, the bearing length of transmission lever 66 on the bar supporting portion 45a of engine body 10 is configured to than transmission lever 66 along with the sliding stroke of the operation of solenoid 62A is long.
One end of transmission lever 66 and push rod 64A axial contact, and axle portion 55a contacts with the other end of transmission lever 66, and from the journal offset of transmission lever 66.More specifically, transmission lever 66 the other end one and be provided with discoid contact plate portion 66a coaxially, this contact plate portion 66a gives prominence to from the other end radially outward, and the axle portion 55a of the first connecting pin 55 contacts with contact plate portion 66a in the position at the center of departing from contact plate portion 66a.
In addition, as best seen in figure 3, a pair rib 71 and 72 is given prominence to integratedly from the internal surface of housing 16, and this is used for the contact surface side oil dripping towards the area side between the first adjacent air inlet side rocking arm 32 and the second air inlet side rocking arm 33 and the first connecting pin 55 and transmission lever 66 to rib.
In addition, push rod 64A is arranged through the housing 63 of solenoid 62A.Push rod 64A is provided with lip part 73 in its one end, and this lip part 73 limits push rod 64A edge for promoting the stroke in the direction of the first connecting pin 55 and the second connecting pin 56 towards the other end side axially by contacting with housing 63.In addition, the cover 74 for covering shell 63 is installed to engine body 10 by mounting plate 67, and covers 74 and be attached to mounting plate 67 by bolt 75.And, on the surface of lip part 73, damping material 76 is fixed with at cover 74, this damping material is formed by rubber, resin-elastomer, damping metal etc., and when towards the side mobile putter 64A making lip part 73 away from housing 63, this damping material contacts with lip part 73.
The operation of the first mode of execution is below described.For the one end being positioned at the axle portion 55a of the first connecting pin 55 of end side vertically in the first connecting pin 55 and the second connecting pin 56, pressing force transfer unit 65A is configured to one end sliding contact with the axle portion 55a of the first connecting pin 55 in the first connecting pin 55 and the second connecting pin 56, the pressing force from solenoid 62A is made to be applied on the first connecting pin 55 and the second connecting pin 56 towards the opposite side of axis, pressing force transfer unit 65A at least comprises push rod 64A, this push rod 64A forms a part of solenoid 62A, the housing 63 of solenoid 62A is installed to engine body 10.In addition, the intermediate portion of pressing force transfer unit 65A is supported in the cylinder head 15 of engine body 10 slidably.Therefore, for supporting the supporting structure of push rod 64A in the housing 63 preventing the masterpiece along bending direction produced due to one end sliding contact with the first connecting pin 55 swung together with the first air inlet side rocking arm 32 to be used in solenoid 62A.Therefore, the supporting structure of push rod 64A in housing 63 can be simplified.
In addition, pressing force transfer unit 65A comprises: push rod 64A, and this push rod forms a part of solenoid 62A, and is bearing on housing 63; And transmission lever 66, this transmission lever is supported on the 45a of bar supporting portion slidably, and one end contacts with push rod 64A, and is configured to one end sliding contact with the axle portion 55a of the first connecting pin 55.This guarantees the first connecting pin 55 and transmission lever 66 sliding contact swung together with the first air inlet side rocking arm 32, thus prevents the masterpiece along bending direction to be used on push rod 64A.Be used in the supporting structure of the housing 63 inner support push rod 64A of solenoid 62A therefore, it is possible to simplify, and the positional accuracy that solenoid 62A installs on engine body 10 can be reduced.
In addition, the transmission lever 66 forming the intermediate portion of pressing force transfer unit 65A is slidably supported on the 45a of bar supporting portion, and the first holding part 45 one of this bar supporting portion and cylinder head 15 is formed continuously.Therefore, it is possible to without the need to the particular component for supporting transmission lever 66, the quantity of parts can be reduced whereby.And, the machining accuracy of the bar supporting portion 45a for supporting transmission lever 66 can be strengthened.
In addition, bar supporting portion 45a and cylinder head 15 form, and what make transmission lever 66 is positioned at housing 16 side relative to the fitting surface 69 between cylinder head 15 and housing 16 at least partially.Therefore, so that assemble transmission lever 66 when housing 16 is separated with cylinder head 15, thus assembling performance can be strengthened.
In addition, for bar supporting portion 45a, this bar supporting portion 45a and the first holding part 45 form as one continuously, and the first holding part 45 is integrally formed with cylinder head 15, thus is assembled air inlet side pitman arm shaft 39 end and be supported on the 45a of bar supporting portion.Therefore, it is possible to by bar supporting portion 45a strengthen arrange in the first holding part 45 for assembling and supporting the periphery of the pilot hole 70 of an end of air inlet side pitman arm shaft 39.And the sliding stroke that the bearing length of transmission lever 66 on the 45a of bar supporting portion is configured to operate with solenoid 62A than transmission lever 66 is long.Therefore, it is possible to guarantee to support transmission lever 66, prevent from, between transmission lever 66 and bar supporting portion 45a, scratching occurs.
In addition, a pair rib 71 and 72 is given prominence to integratedly from the internal surface of housing 16, and this is used for the contact surface side oil dripping towards the area side between the first adjacent air inlet side rocking arm 32 and the second air inlet side rocking arm 33 and the first connecting pin 55 and transmission lever 66 to rib.This guarantees that oil drips from rib 71,72.Therefore, it is possible to oil to be caused the region between the first adjacent air inlet side rocking arm 32 and the second air inlet side rocking arm 33, and oil can be caused the contact surface of the first connecting pin 55 and transmission lever 66, and without the need to configuring complicated oil channel structures.Therefore, it is possible to realize alleviating of the weight of cylinder head 15 and housing 16.
In addition, the cover 74 for the housing 63 covering solenoid 62A is installed to engine body 10.In addition, one end place of push rod 64A is provided with lip part 73, this lip part 73 by contacting with housing 63 for limit push rod 64A along the stroke for promoting the direction of the first connecting pin 55 and the second connecting pin 56 towards the other end side axially.In addition, be fixed with damping material 76 at cover 74 on the surface of lip part 73, when towards the side mobile putter 64A making lip part 73 away from housing 63, this damping material contacts with lip part 73.Therefore, contacted with damping material 76 by the push rod 64A promoted from the first connecting pin 55 side, this guarantees that anti-throw-out lever 64A rebounds in opposite direction, can limit the motion of adjoint push rod 64A and the gimp that produces simultaneously.
In addition, the axle portion 55a of the first connecting pin 55 contacts with this contact plate portion 66a in the position at center of the discoid contact plate portion 66a departing from the other end place being arranged on transmission lever 66 coaxially.Therefore, along with the swing of the first air inlet side rocking arm 32, for making transmission lever 66 be used in transmission lever 66 around the masterpiece that its axis rotates, the contact position between the axle portion 55a of the first connecting pin 55 and contact plate portion 66a can be changed whereby, thus these components can be suppressed to shorten the life-span due to wearing and tearing.
With reference to Fig. 5, the second mode of execution of the present invention is described.Parts corresponding with the parts in the first mode of execution shown in Fig. 5 are by the identical reference character be marked by with use above.Detailed description to these parts will be omitted.
Pressing force transfer unit 65B is configured to and one end sliding contact being positioned at the axle portion 55a of first connecting pin 55 at one end place vertically in the first connecting pin 55 of air door operation characteristic change device 54 and the second connecting pin 56, the pressing force from solenoid 62B is made to be applied on one end of the end side vertically of the first connecting pin 55 in the first connecting pin 55 and the second connecting pin 56, pressing force transfer unit 65B at least comprises push rod 64B, this push rod 64B forms the part as the solenoid 62B of pressing force occurring source, the housing 63 of solenoid 62B is installed to engine body 10.
Pressing force transfer unit 65B comprises: push rod 64B, and this push rod is bearing on housing 63; Transmission lever 66, this transmission lever is supported on the bar supporting portion 45a of engine body 10 slidably, and one end sliding contact of axle portion 55a with the first connecting pin 55; And damping material 77, this damping material is folded between transmission lever 66 and push rod 64A.Damping material 77 assembles and is fixed on the end being positioned at transmission lever 66 side of push rod 64B.
According to the second mode of execution, owing to being folded with damping material 77 between push rod 64B and transmission lever 66, therefore, it is possible to produce gimp between restriction push rod 64B and transmission lever 66.
Although be described above embodiments of the present invention, the invention is not restricted to above-mentioned mode of execution, therefore not departing from situation of the present invention as claimed in claim, can various Change In Design be carried out.
Such as, although be illustrated such variable valve system in the above embodiment, wherein, by make a pair rocking arm of adjacent layout connect with remove this be connected between carry out switching the operator scheme changing engine valve, but the present invention also can be applicable to by connect at three or more the rocking arms making to arrange adjacent to each other with remove this be connected between carry out switching the variable valve system of the operator scheme changing engine valve.In addition, the present invention can carry out for exhaust valve.
Fig. 7 and Fig. 8 and Fig. 3 and Fig. 4 is similar.The reference character identical with Fig. 3 with Fig. 4 is used to refer to identical parts in figures 7 and 8.As shown in Figure 7, solenoid 62 as actuator is connected to the one end being positioned at the press part 55a of the first connecting pin 55 one of end side vertically in the first connecting pin 55 and the second connecting pin 56 and operation associated with one end of this press part 55a, and the housing 63 of solenoid 62 is installed to engine body 10.Pressing force from solenoid 62 can be applied on the 55a of press part along making the first connecting pin 55 and the second connecting pin 56 move to be connected the direction of the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33.
The housing 63 of solenoid 62 is installed to cylinder head 15 and the housing 16 of engine body 10 by mounting plate 67.Housing 63 and mounting plate 67 are installed to cylinder head 15 and housing 16 by multiple bolt 68 by jointly fastening.
Solenoid 62 has the output shaft 64 be supported on housing 63, and output shaft is moved vertically by this solenoidal excitation.Output shaft 64 is connected to the press part 55a of the first connecting pin 55 by transmission lever 66, transmission lever 66 can rotate and can state lower support is on the 45a of bar supporting portion in axial sliding, and the first holding part 45 of bar supporting portion 45a and cylinder head 15 is formed integratedly continuously.And bar supporting portion 45a is provided with oilhole 77, this oilhole 77 is opened in upside, for the region supplying lubricating oil between bar supporting portion 45a and transmission lever 66.
Meanwhile, output shaft 64 is arranged through the housing 63 of solenoid 62.Output shaft 64 is provided with lip part 73 in its one end, and this lip part 73 limits the edge of output shaft 64 for promoting the stroke in the direction of the first connecting pin 55 and the second connecting pin 56 towards the other end side axially by contacting with housing 63.In addition, the cover 74 for covering shell 63 is installed to engine body 10 by mounting plate 67, and covers 74 and be attached to mounting plate 67.And, on the surface of lip part 73, damping material 76 is fixed with at cover 74, this damping material is formed by rubber, resin-elastomer, damping metal etc., and when towards the side mobile putter 64A making lip part 73 away from housing 63, this damping material contacts with lip part 73.This guarantees that the output shaft 64 by promoting from the first connecting pin 55 side contacts with damping material 76, prevents output shaft 64 from rebounding in opposite direction whereby, and in addition, adjoint output shaft 64 can also be suppressed to move and the gimp that produces.
As shown in Figure 7, a pair rib 71 and 72 is given prominence to integratedly from the internal surface of housing 16, and this is used for the contact surface side oil dripping towards the area side between the first adjacent air inlet side rocking arm 32 and the second air inlet side rocking arm 33 and the first connecting pin 55 and transmission lever 66 to rib.Therefore, it is possible to oil to be caused the region between the first air inlet side rocking arm 32 and the second air inlet side rocking arm 33, and oil can be caused the contact surface of the first connecting pin 55 and transmission lever 66, and without the need to configuring complicated oil channel structures.Therefore, it is possible to realize alleviating of the weight of cylinder head 15 and housing 16.
As shown in Figure 8, sliding contact surface 78 is formed in the end of the 55a side, press part of transmission lever 66.In addition, press part 55a be formed as spherical for the surface of contact 79 contacted with sliding contact surface 78.
And the central axis C1 of press part 55a is arranged to offset from the central axis C2 of transmission lever 66.More specifically, the distance L1 between the central axis CL of air inlet side the pitman arm shaft 39 and central axis C1 of press part 55a is set to be greater than the distance L2 between the central axis CL of air inlet side the pitman arm shaft 39 and central axis C2 of transmission lever 66.
The flange shape contacting part 66a being formed with sliding contact surface 78 is arranged on the end of the 55a side, press part of transmission lever 66 integratedly in the mode that radially outward is given prominence to.Sliding contact surface 78 is formed as smooth.
In addition, as shown in Figure 6, the central axis C3 of the output shaft 64 that solenoid 62 has is arranged to offset from the central axis C2 of transmission lever 66, and offset direction is identical with the direction that the central axis C2 of transmission lever 66 offsets from the central axis C1 of press part 55a.
Arrange under the state by departing from towards the side of cylinder head 15 solenoid 62 and produce space in, be furnished with water-cooling tube 82, this water-cooling tube extends from the thermostat accommodating part 81 being arranged on cylinder head 15.
The operation of Fig. 6 to Figure 10 will be described.Be formed as contacting with shaft-like press part 55a for the transmission lever 66 transmitted from the pressing force of solenoid 62, transmission lever 66 is by along the direction operation parallel with the direction of operating of the second connecting pin 56 with the first connecting pin 55, and shaft-like press part 55a is continuous coaxially with the first connecting pin 55 one be assemblied in slidably in the first air inlet side rocking arm 32.In addition, the surface of contact 79 of press part 55a is formed as spherical, and this surface of contact 79 is for contacting with the sliding contact surface 78 of end of the 55a side, press part being formed in transmission lever 66.As a result, press part 55a and surface of contact 78 form point cantact, thus reduce area of contact, and this makes it possible to the area reducing surface of contact 78, and the size of transmission lever 66 and weight can be made to reduce.In addition, even if the central axis C1 of press part 55a tilts relative to the central axis C2 of transmission lever 66, press part 55a also can not form peripheral collision on sliding contact surface 78, thus can strengthen abrasion resistance.The bar side end face of press part 55a is formed as spherical so as to the structure of sliding relative to the first air inlet side rocking arm 32, and this makes it possible to the weight alleviating the first air inlet side rocking arm 32, strengthens abrasion resistance simultaneously.
In addition, the central axis C1 of press part 55a is arranged to offset from the central axis C2 of transmission lever 66.Therefore, as shown in Figure 9, the central axis C1 of the press part 55a swung together with the first air inlet side rocking arm 32 moves along arc-shaped track LT in the position that the central axis C2 with the transmission lever 66 being positioned at fixed position place departs from, being centrally located on the central axis CL of air inlet side pitman arm shaft 39 of this circular arc.As a result, the power for making transmission lever 66 rotate is applied to transmission lever 66 from press part 55a.The rotation of transmission lever 66 changes the point of contact of press part 55a and sliding contact surface 78, thus can prevent concentrated wear, reduces the wearing and tearing (abrasion) of sliding contact surface 78 simultaneously.
In addition, the distance L1 between the central axis CL of air inlet side the pitman arm shaft 39 and central axis C1 of press part 55a is greater than the distance L2 between the central axis CL of air inlet side the pitman arm shaft 39 and central axis C2 of transmission lever 66.Therefore, the central axis C1 of press part 55a is circular arcs relative to the swinging track LT of sliding contact surface 78, and this circular arc is through the outside of the central axis C2 of transmission lever 66.Therefore, press part 55a is contacted with sliding contact surface 78, effectively utilizes the space of sliding contact surface 78 simultaneously.As a result, the area of sliding contact surface 78 reduces further, the size of transmission lever 66 and weight can be made whereby to reduce, and can increase the power for making transmission lever 66 rotate further, the rotation of Faciliated diffusion bar 66 thus.
Transmission lever 66 is supported on the bar supporting portion 45a that is arranged in the cylinder head 15 of engine body 10, thus can rotate and slide axially.Bar supporting portion 45a is provided with oilhole 77, and this oilhole is used for the region supplying lubricating oil between supporting portion 45a and transmission lever 66.Therefore, it is possible to the rotation of further Faciliated diffusion bar 66.
In addition, the flange shape contacting part 66a being formed with sliding contact surface 78 is wholely set the end of the 55a side, press part in transmission lever 66 in the mode that radially outward is given prominence to.Therefore, it is possible to realize the weight saving of transmission lever 66, prevent transmission lever 66 from the 45a slippage of bar supporting portion simultaneously and increase the area of sliding contact surface 78.
And sliding contact surface 78 is formed as smooth.Therefore, the path increment of transmission lever 66 can be made constant, and have nothing to do with the rotation of transmission lever 66, it is hereby ensured the better machinability of sliding contact surface 78.
In addition, as shown in Figure 2, the central axis C3 of output shaft 64 that solenoid 62 has is arranged to offset along the direction identical from the direction that the central axis C1 of press part 55a offsets with the central axis C2 of transmission lever 66 from the central axis C2 of transmission lever 66.Thus can the rotation of Faciliated diffusion bar 66 further.Wherein solenoid 62 and the bar supporting portion 45a structure be disposed under the state departed from the side towards cylinder head 15 makes it possible to the space of other component guaranteed for effectively arranging such as water-cooling tube 82.
With reference to Figure 10, another embodiment of the invention is described.Figure 10 illustrates the parts corresponding with the parts in Fig. 9, use simultaneously and identify with above identical reference character used.
Sliding contact surface 78 is formed to make, in projection in the plane orthogonal to the central axis C1 of press part 55a and the central axis C2 of transmission lever 66, the press part 55a swung together with the first air inlet side rocking arm 32 gives prominence to from sliding contact surface 78 in a part for its hunting range.
According to this mode of execution, the area of sliding contact surface 78 can be reduced further, guarantees that press part 55a contacts really with sliding contact surface 78 simultaneously.
Although be described above embodiments of the present invention, the invention is not restricted to above-mentioned mode of execution, therefore not departing from situation of the present invention as described in the accompanying claims, can various amendment be carried out.
The present invention such as can also use for exhaust valve.
As described herein the present invention, the change can carrying out many forms to the present invention should be known.These change should not be considered as disengaging the spirit and scope of the present invention, and all these modification that it will be apparent to those skilled in the art ought to comprise within the scope of the appended claims.
Claims (17)
1. the variable valve system for the internal-combustion engine of automatic two-wheeled cycle, in this variable valve system, multiple connecting pin is slidably assemblied in multiple rocking arm, described multiple connecting pin is carried out spring-biased towards side axially and is contacted with each other, thus allow the link position that adjacent rocking arm is connected and for remove described connection off position between along described axial motion, described multiple rocking arm is arranged adjacent to each other and is comprised and is connected and the rocking arm operation associated with engine valve with engine valve, and pressing force transfer unit is configured to and the press part sliding contact being placed continuously into the shaft-like coaxial with the described connecting pin of end side axially described in being positioned in described multiple connecting pin, make to be applied on described multiple connecting pin from solenoidal pressing force towards described opposite side axially, described pressing force transfer unit at least comprises push rod, this push rod forms a described solenoidal part, described solenoid has the housing being installed to engine body, wherein,
Described pressing force transfer unit comprises: supporting described push rod on the housing; And transmission lever, this transmission lever is slidably supported on described engine body or is fixed on the supporting part of this engine body, one end of this transmission lever contacts with described push rod, and described transmission lever be configured to be positioned at described in one end sliding contact of described connecting pin of end side axially
The central axis of described press part is arranged to offset from the central axis of described transmission lever,
Further, the central axis of described push rod is arranged to: relative to the central axis of described transmission lever, offsets to the direction identical relative to the offset direction of the central axis of described press part with the central axis of described transmission lever.
2. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 1, wherein, bar supporting portion and cylinder head for slidably supporting described transmission lever are integrally formed, described cylinder head forms a part for described engine body and supports described engine valve, thus described engine valve can be opened and closed.
3. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 2, wherein, described bar supporting portion and described cylinder head are integrally formed, wherein said transmission lever be positioned at described housing side relative to the fitting surface between described cylinder head and the housing being connected to this cylinder head at least partially.
4. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 3, wherein, described bar supporting portion and holding part one are formed continuously, described holding part and described cylinder head are integrally formed for assembling and supporting the end of pitman arm shaft, and described pitman arm shaft is used for supporting described rocking arm in swingable mode.
5. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 3, wherein, be extruded with rib integratedly from the internal surface of described housing, described rib be used for towards the area side between adjacent described rocking arm and described transmission lever be positioned at described in the contact surface side oil dripping of described connecting pin of end side axially.
6. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 1, wherein, the described transmission lever length be supported on described engine body is greater than the sliding stroke along with the described transmission lever of described solenoidal operation.
7. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 2, wherein, the described transmission lever length be supported on described engine body is greater than the sliding stroke along with the described transmission lever of described solenoidal operation.
8. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 1, wherein, cover for covering described housing is installed to described engine body, one end place of described push rod is provided with lip part, this lip part by with described body contact and limit described push rod along the stroke promoted towards described opposite side axially on the direction of described multiple connecting pin, and be fixed with damping material on the surface towards described lip part of described cover, when making described push rod move towards the side making described lip part away from described housing, described damping material contacts with described lip part.
9. the variable valve system of the internal-combustion engine for automatic two-wheeled cycle according to claim 1, is folded with damping material between described transmission lever and described push rod.
10. the variable valve system for the internal-combustion engine of automatic two-wheeled cycle, in this variable valve system, multiple connecting pin comprises specific connecting pin, this specific connecting pin is slidably assembled to the rocking arm being positioned at one end place in arranged direction in multiple rocking arms disposed adjacent one another, described multiple connecting pin is slidably assemblied in described multiple rocking arm and also contacts each other, thus allow to move with for removing between the described off position be connected at the link position for making adjacent rocking arm connect, and coaxially to connect with described specific connecting pin and the shaft-like press part operation associated with it is caused and contacts with a transmission lever, described transmission lever is used for transmitting from solenoidal pressing force, described solenoid is along the direction operation parallel with the direction of operating of described connecting pin, wherein,
The following surface of contact of described press part is formed as spherical, and this surface of contact is used for contacting with the sliding contact surface being formed in the end of side, described press part of described transmission lever,
This variable valve system has: push rod, and this push rod forms a described solenoidal part with housing, and wherein, described housing is installed on engine body; And described transmission lever, this transmission lever is slidably supported on described engine body or is fixed on the supporting part of this engine body, one end of this transmission lever contacts with described push rod, and described transmission lever be configured to be positioned at described in one end sliding contact of described connecting pin of end side axially
The central axis of described press part is arranged to offset from the central axis of described transmission lever,
Further, the central axis of described push rod is arranged to: relative to the central axis of described transmission lever, offsets to the direction identical relative to the offset direction of the central axis of described press part with the central axis of described transmission lever.
The variable valve system of 11. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, the distance between the central axis of described pitman arm shaft and the central axis of described transmission lever is set to be greater than for the distance slidably supported between the central axis of the pitman arm shaft of described multiple rocking arm and the central axis of described press part.
The variable valve system of 12. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, described transmission lever is supported on the bar supporting portion that is arranged on engine body, thus can to rotate and can axial motion, described bar supporting portion is provided with oilhole, and this oilhole is used for the region supplying lubricating oil between described bar supporting portion and described transmission lever.
The variable valve system of 13. internal-combustion engines for automatic two-wheeled cycle according to claim 12, wherein, be integrally formed with flange shape contacting part in the described end being positioned at side, described press part of described transmission lever in the mode that radially outward is outstanding, this flange shape contacting part is formed with described sliding contact surface.
The variable valve system of 14. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, described sliding contact surface is formed as even shape.
The variable valve system of 15. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, described sliding contact surface is formed as even shape.
The variable valve system of 16. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, described sliding contact surface is formed, in projection wherein in the plane orthogonal with the central axis of described press part and the central axis of described transmission lever, the part with the described press part that being positioned in described multiple rocking arm swings together with the rocking arm at one end place in described arranged direction in its hunting range is given prominence to from described sliding contact surface.
The variable valve system of 17. internal-combustion engines for automatic two-wheeled cycle according to claim 10, wherein, described sliding contact surface is formed, in projection wherein in the plane orthogonal with the central axis of described press part and the central axis of described transmission lever, the part with the described press part that being positioned in described multiple rocking arm swings together with the rocking arm at one end place in described arranged direction in its hunting range is given prominence to from described sliding contact surface.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-199666 | 2010-09-07 | ||
| JP2010199666 | 2010-09-07 | ||
| JP2010-221406 | 2010-09-30 | ||
| JP2010221406A JP5513339B2 (en) | 2010-09-30 | 2010-09-30 | Variable valve operating device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102400733A CN102400733A (en) | 2012-04-04 |
| CN102400733B true CN102400733B (en) | 2015-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110259801.6A Expired - Fee Related CN102400733B (en) | 2010-09-07 | 2011-09-05 | Variable Air Valve System For Combustion Motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102400733B (en) |
| BR (1) | BRPI1104775A2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5771494B2 (en) * | 2011-09-28 | 2015-09-02 | 本田技研工業株式会社 | Variable valve operating device for internal combustion engine |
| CN109779715B (en) * | 2019-02-26 | 2020-01-17 | 浙江大学 | Variable gas distribution timing-lift device and control method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5269270A (en) * | 1991-03-20 | 1993-12-14 | Honda Giken Kogyo Kabushiki Kaisha | Four-stroke cycle internal-combustion engine |
| CN1301912A (en) * | 1999-12-28 | 2001-07-04 | 本田技研工业株式会社 | Valve operation system in IC engine |
| CN1308179A (en) * | 1999-12-28 | 2001-08-15 | 本田技研工业株式会社 | Air valve controlling system for internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226216A (en) * | 1983-06-06 | 1984-12-19 | Honda Motor Co Ltd | Valve gear equipped with deactivating function for internal-combustion engine |
| JPS6415415A (en) * | 1987-07-10 | 1989-01-19 | Honda Motor Co Ltd | Tappet valve system for internal combustion engine |
| JPH01305113A (en) * | 1988-06-01 | 1989-12-08 | Honda Motor Co Ltd | Valve system device for internal combustion engine |
| JPH0612057B2 (en) * | 1990-08-31 | 1994-02-16 | 本田技研工業株式会社 | Valve drive for internal combustion engine |
| JP3299363B2 (en) * | 1993-12-24 | 2002-07-08 | 本田技研工業株式会社 | Valve train for internal combustion engine |
| JP3396412B2 (en) * | 1997-11-11 | 2003-04-14 | 株式会社オティックス | Variable valve mechanism |
-
2011
- 2011-09-05 CN CN201110259801.6A patent/CN102400733B/en not_active Expired - Fee Related
- 2011-09-05 BR BRPI1104775 patent/BRPI1104775A2/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5269270A (en) * | 1991-03-20 | 1993-12-14 | Honda Giken Kogyo Kabushiki Kaisha | Four-stroke cycle internal-combustion engine |
| CN1301912A (en) * | 1999-12-28 | 2001-07-04 | 本田技研工业株式会社 | Valve operation system in IC engine |
| CN1308179A (en) * | 1999-12-28 | 2001-08-15 | 本田技研工业株式会社 | Air valve controlling system for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102400733A (en) | 2012-04-04 |
| BRPI1104775A2 (en) | 2013-02-13 |
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