CN103362587A - Engine and actuating mechanism of variable valve lift device thereof - Google Patents
Engine and actuating mechanism of variable valve lift device thereof Download PDFInfo
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- CN103362587A CN103362587A CN2013103259920A CN201310325992A CN103362587A CN 103362587 A CN103362587 A CN 103362587A CN 2013103259920 A CN2013103259920 A CN 2013103259920A CN 201310325992 A CN201310325992 A CN 201310325992A CN 103362587 A CN103362587 A CN 103362587A
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Abstract
The invention discloses an engine and an actuating mechanism of a variable valve lift device thereof. The actuating mechanism comprises a first hydraulic valve block, a first driving rod, a second driving rod, an elastic resetting device and an elastic piece, wherein the first hydraulic valve block is internally provided with a first valve cavity and a second valve cavity which are the same in shape and are mutually communicated, and the first valve cavity and the second valve cavity are filled with liquid; one end of the first driving rod extends into the first valve cavity from one end of the first valve cavity, the first driving rod and the first valve cavity are in sealing fit and can relatively move, and a first shifting fork is arranged on the first driving rod; one end of the second driving rod extends into the second valve cavity, the second driving rod and the second valve cavity are in sealing fit and can relatively move, and a second shifting fork is arranged on the second driving rod; the elastic resetting device is positioned at the other end of the first driving rod; and the elastic piece is elastically abutted between a first cam and a second cam. The actuating mechanism disclosed by the invention has the advantages of simple structure, reliable control and high precision.
Description
Technical field
The present invention relates to the automobile construction technical field, especially relate to a kind of actuating mechanism of the variable air valve lift apparatus for motor.
Background technique
The valve actuating mechanism of conventional engines, its port timing immobilize in the course of the work, and the valve motion rule are determined by cam profile fully generally based on the local optimum of a certain narrow and small condition range of motor and determine.But the conventional gasoline engin cam profile is single, can not adjust air inflow according to engine load conditions.The valve Operational Limits of conventional engines distribution device also is changeless, the operating point of determining to depend on design of parameter.
Existing non-continuously variable valve lift structure lift mode is single, can not realize most of operating mode of motor, and oil-saving effect is not obvious.And existing continuously variable valve lift technology component cost is high, and complex structure is high to the reliability requirement of each component, the difficulty of engine cylinder cover design is larger, particularly the structure of actuating mechanism is more complicated, and its adjustment process is wayward, and degree of regulation is poor.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of above-mentioned technical problem of the prior art.
For this reason, one object of the present invention is to propose a kind of actuating mechanism of the variable air valve lift apparatus for motor, and this actuating mechanism is simple in structure, control is convenient.
Another object of the present invention is to propose a kind of motor, and this motor comprises the actuating mechanism of the above-mentioned variable air valve lift apparatus that is used for motor.
According to an aspect of the present invention, a kind of actuating mechanism of the variable air valve lift apparatus for motor has been proposed, described variable air valve lift apparatus comprises camshaft mechanism, described camshaft mechanism comprises camshaft, the first cam and the second cam, described actuating mechanism comprises: the first hydraulic valve block, described the first hydraulic valve block is suitable for being fixed on the cylinder cap of described motor, have the first valve pocket and the second valve pocket in described the first hydraulic valve block, one end of each in described the first valve pocket and described the second valve pocket all opens wide and the other end all seals, described the first valve pocket is identical with described second valve cavity shape and communicate with each other, and is full of liquid in described the first valve pocket and described the second valve pocket; The first driveshaft, an end of described the first driveshaft extend in described the first valve pocket from a described end of described the first valve pocket, and described the first driveshaft and described the first valve pocket are sealed and matched and can relatively move, and are provided with the first shift fork on described the first driveshaft; The second driveshaft, one end of described the second driveshaft extend in described the second valve pocket from a described end of described the second valve pocket, described the second driveshaft and described the second valve pocket are sealed and matched and can relatively move, be provided with the second shift fork on described the second driveshaft, the other end of described the second driveshaft is suitable for driving it by hydraulic oil and moves; Elasticity reset device, described elasticity reset device are positioned at the other end of described the first driveshaft and are suitable for flexibly compressing the other end of described the first driveshaft; Elastic component, described elastic component are suitable for flexibly being pressed between described the first cam and described the second cam.
Actuating mechanism according to the embodiment of the invention can be used in the variable air valve lift apparatus, the first cam in the driving cam axis mechanism and the second cam action, realize the continuous variable of valve lift, simple in structure, compact, convenient integrated being arranged in the cylinder head, and this actuating mechanism can be arranged on the residing height of camshaft, can additionally not increase the height of cylinder head.And this actuating mechanism adopts hydraulic control, and the driving process is more reliable and precision is high thereby make.
In addition, the actuating mechanism according to the variable air valve lift apparatus for motor of the present invention can also have following additional technical feature:
According to one embodiment of present invention, described actuating mechanism also comprises: the second hydraulic valve block, described the second hydraulic valve block is suitable for being fixed on the described cylinder cap, have the 3rd valve pocket and the 4th valve pocket in described the second hydraulic valve block, the other end of described the first driveshaft extend in described the 3rd valve pocket, described elasticity reset device is located in described the 3rd valve pocket, it is interior and removable with respect to described the 4th valve pocket that the other end of described the second driveshaft is engaged in described the 4th valve pocket hermetically, and wherein said hydraulic oil is suitable for entering in described the 4th valve pocket and moves to drive described the second driveshaft.
According to one embodiment of present invention, the entrance point of described the 4th valve pocket is provided with control valve.
According to one embodiment of present invention, be provided with the leakage hole that is communicated with described the 3rd valve pocket on described the second hydraulic valve block.
According to one embodiment of present invention, described actuating mechanism also comprises be used to the displacement measuring device of measuring described the first driveshaft and/or described the second driveshaft displacement.
According to one embodiment of present invention,
The cross section of a described end of described the first driveshaft is the limit number greater than three polygon facet, and the cross section of a described end of the cross section of described the first valve pocket and described the first driveshaft is adaptive to prevent that described the first driveshaft from rotating with respect to described the first valve pocket;
The cross section of a described end of described the second driveshaft is the limit number greater than three polygon facet, and the cross section of a described end of the cross section of described the second valve pocket and described the second driveshaft is adaptive to prevent that described the second driveshaft from rotating with respect to described the second valve pocket.
According to one embodiment of present invention, described elasticity reset device is spring.
According to one embodiment of present invention,
The free end of described the first shift fork is provided with the first roller, and described the first roller rollably pushes against described the first cam;
The free end of described the second shift fork is provided with the second roller, and described the second roller rollably pushes against described the second cam;
Wherein, described the first roller and described the second roller lay respectively at the outside of described the first cam and described the second cam.
According to one embodiment of present invention, described actuating mechanism also comprises clutch shaft bearing, described clutch shaft bearing be suitable for being enclosed within on the described camshaft and lay respectively at described the first cam and described the first shift fork and described the second cam and described the second shift fork between.
According to a further aspect in the invention, proposed a kind of motor, this motor comprises the actuating mechanism of the above-mentioned variable air valve lift apparatus that is used for motor.
Description of drawings
Fig. 1 is that variable air valve lift apparatus is assemblied in the interior schematic diagram of cylinder head according to an embodiment of the invention;
Fig. 2 is the plan view of variable air valve lift apparatus according to an embodiment of the invention;
Fig. 3-Fig. 4 is the schematic diagram of variable air valve lift apparatus when valve lift is zero lift according to an embodiment of the invention;
Fig. 5-Fig. 6 is the schematic diagram of variable air valve lift apparatus when valve lift is little lift according to an embodiment of the invention;
Fig. 7-Fig. 8 is the schematic diagram of variable air valve lift apparatus when valve lift is high-lift according to an embodiment of the invention;
Fig. 9 is the sectional view of the first hydraulic valve block according to an embodiment of the invention;
Figure 10 is the sectional view at another visual angle of the first hydraulic valve block according to an embodiment of the invention;
Figure 11 is the plan view of the first hydraulic valve block according to an embodiment of the invention;
Figure 12 is the sectional view of the second hydraulic valve block according to an embodiment of the invention;
Figure 13 is the sectional view at another visual angle of the second hydraulic valve block according to an embodiment of the invention;
Figure 14 is the schematic diagram of the first driveshaft, the first shift fork and the second driveshaft and the second shift fork according to an embodiment of the invention;
Figure 15 is the schematic diagram of the first driveshaft, the first shift fork according to an embodiment of the invention;
Figure 16 is the schematic diagram of the second driveshaft, the second shift fork according to an embodiment of the invention;
Figure 17 is the plan view of platen according to an embodiment of the invention;
Figure 18 is the sectional view of platen according to an embodiment of the invention;
Figure 19 is the sectional view of camshaft mechanism according to an embodiment of the invention;
Figure 20 is the stereogram of the first cam or the second cam according to an embodiment of the invention;
Figure 21 is the sectional view of the first cam or the second cam according to an embodiment of the invention;
Figure 22 is the plan view of rocker arm body according to an embodiment of the invention;
Figure 23 is the side view of rocker arm body according to an embodiment of the invention;
Figure 24 is the sectional view of roller according to an embodiment of the invention.
Embodiment
The below describes embodiments of the invention in detail, and described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center "; " vertically "; " laterally "; " length "; " width "; " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless clear and definite concrete restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in the terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected with, and also can be to removably connect, or be integral; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can indirectly link to each other by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, can comprise that also the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that the First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under the Second Characteristic and tiltedly, or only represent that the First Characteristic level height is less than Second Characteristic.
The engine body group is the support of motor, is the matrix of connecting rod, distribution device and the assembling of each system.The body group mainly is comprised of cylinder block, cylinder head, cylinder head gasket and oil sump etc., oil sump generally is located at the bottom of cylinder block, cylinder head is located at the top of cylinder block, and cylinder head gasket is located between the bottom surface of the end face of cylinder block and cylinder head, is used for the gap of sealing between the two.
Cylinder head forms the firing chamber with piston head and cylinder, and the top of firing chamber has suction port and relief opening, and valve mechanism is located in the cylinder head and sealing suction port and relief opening.For existing general motor, adopt two valve mechanisms that advance scene 2 more, minority also has the valve mechanism that adopts one-in-and-one-out or three to advance scene 2.
For same motor, generally all has multiple different operating mode, such as low speed small load condition, high speed high load working condition etc., when motor is under the low speed small load condition, the power of motor and the output of moment of torsion are relatively low, and the air that therefore enters in the firing chamber can be relatively less, and be under the high speed high load working condition at motor, the power of motor is relative with the output of moment of torsion higher, therefore needs more air to enter in the firing chamber and more oil inflame.
Variable air valve lift apparatus of the present invention can be realized the continuous variable of particularly air inlet side of valve lift valve lift, thereby can come intelligent adjusting valve lift according to the residing different operating modes of motor, guarantee that air and fuel oil in the firing chamber fully burn, and improve power performance and the fuel economy of motor.
Below with reference to the variable air valve lift apparatus 1000 that be used for motor of Fig. 1-Figure 24 detailed description according to the embodiment of the invention.
Variable air valve lift apparatus 1000 comprises valve mechanism 100, camshaft mechanism 200, rocker arm body 300 and actuating mechanism 400 according to an embodiment of the invention.
Wherein, such as Fig. 3-shown in Figure 8, valve mechanism 100 has been prior art, and known by those of ordinary skill in the art, for example valve mechanism 100 can comprise the gentle door of valve head bar section, valve mechanism 100 can move up and down to open or close along the center line of valve mechanism 100 suction port or the relief opening of firing chamber in valve guide bushing, for these parts that can adopt with prior art identical or close design, be not described in detail here.
Camshaft mechanism 200 is located at the top of valve mechanism 100, camshaft mechanism 200 comprises camshaft 201, the first cam 203 and the second cam 207, with reference to shown in Figure 2, the first cam 203 is set on the camshaft 201 and with camshaft 201 and rotates and can move axially, that is to say, but the first cam 203 is with the central axis synchronous rotary of camshaft 201 around camshaft 201, and the first cam 203 camshaft 201 axially on camshaft 201 is removable relatively.For example, camshaft 201 can be splined shaft or with the singly-bound axle of keyway, the keyways that the first cam 203 has and camshaft 201 axially cooperates.That is, cooperate with keyway between the camshaft 201 by the first cam 203, can realize the first cam 203 with camshaft 201 synchronous rotaries on the one hand, can also realize that on the other hand the first cam 203 relative camshafts 201 move axially.
Similarly, the second cam 207 is set on the camshaft 201 and with camshaft 201 and rotates and can move axially, that is to say, but the second cam 207 is with the central axis synchronous rotary of camshaft 201 around camshaft 201, and the second cam 207 camshaft 201 axially on camshaft 201 is removable relatively.For example, camshaft 201 can be splined shaft or with the singly-bound axle of keyway, the keyways that the second cam 207 has and camshaft 201 axially cooperates.That is, cooperate with keyway between the camshaft 201 by the second cam 207, can realize the second cam 207 with camshaft 201 synchronous rotaries on the one hand, can also realize that on the other hand the second cam 207 relative camshafts 201 move axially.
With reference to Fig. 2-shown in Figure 8, the first cam 203 and the second cam 207 is contiguous arranges to consist of the pair of cams group, this pair of cams group is used for driving rocker arm body 300.Wherein, the shape of the first cam 203 and the second cam 207 is the mirror image symmetry preferably, and after the first cam 203, the second cam 207 are finished with camshaft 201 assemblings, the first cam 203 and the second cam 207 also are the mirror image symmetries, in other words, will overlap fully with the second cam 207 after 180 ° of the first cam 203 counter-rotatings.
With reference to Fig. 2, Figure 19 and shown in Figure 21, be configured with the first drive surface 205 on the first cam 203, be configured with the second drive surface 209 on the second cam 207, the first drive surface 205 and the second drive surface 209 camshaft 201 axially on toward each other, namely the first drive surface 205 and the second drive surface 209 also are the mirror image symmetries.The first drive surface 205 and the second drive surface 209 all are configured to be suitable for obtaining required valve lift, because the first drive surface 205 and the second drive surface 209 also are the mirror image symmetric relations, therefore here only take the first drive surface 205 as the example explanation.
For example, this first drive surface 205 can precompute according to the different operating modes of motor the line style of this first drive surface 205, particularly, the line style of this first drive surface 205 can draw by the anti-mode that pushes away, such as the valve lift curve that should have according to valve mechanism 100 different air valve lifts and consider roller 301 and the first cam 203(and the second cam 207) position that contacts obtains corresponding the first drive surface 205(and the second drive surface 209) the shape line, obtained by numerous cam-shaped line scanning again, this all is that appearance is intelligible for the ordinary skill in the art.
Like this, when this motor turns round with a certain operating mode, have on the first drive surface 205 be suitable for this operating mode under be suitable for driving the line style part of the roller 301 of rocker arm body 300 most, thus by the roller 301 of change rocker arm body 300 and the cooperation position that contacts of this first drive surface 205, thereby so that the lift amount of valve mechanism 100 is suitable, guarantee to enter abundance and suitable air quantity in the firing chamber, in order to fully burn with fuel oil, improve power output and the fuel economy of motor.
More specifically, such as Figure 19 and shown in Figure 20, the first drive surface 205 and the second drive surface 209 all can comprise chamfered portion and planar section, when roller 301 cooperates with chamfered portion, the lift amount of valve mechanism 100 is less, particularly, roller 301 contacts the position of cooperation the closer to planar section with the inclined-plane, lift amount is larger, roller 301 contacts the position and the planar section that cooperate with the inclined-plane far away, to such an extent as to the less lift amount of lift amount is zero, roller 301 contacts with planar section when cooperating, and lift amount is maximum.Certainly, be understandable that, the present invention is not limited to this, in other embodiments of the present invention, the first drive surface 205 and the second drive surface 209 also can be inclined-plane or arc shaped surface or other profile, as long as the first drive surface 205 and the second drive surface 209 can be configured to be suitable for obtaining required valve lift, this all is that appearance is intelligible for the ordinary skill in the art.
Such as Fig. 3-shown in Figure 8, rocker arm body 300 is located between valve mechanism 100 and the camshaft mechanism 200, and rocker arm body 300 comprises roller 301, and roller 301 is suitable for respectively cooperating with the first drive surface 205 and the second drive surface 209.Namely, when camshaft 201 rotation, the first drive surface 205 and the second drive surface 209 can press down the non-zero lift situation of roller 301(), thus rocker arm body 300 is back and forth moved up and down around the central axis of valve mechanism 100 to drive valve mechanism 100 as fulcrum integral body to lower swing take fulcrum structure 341.
As shown in Figure 2, actuating mechanism 400 is used for driving the cooperation position that contacts that the first cam 203 is synchronized with the movement in opposite directions with the second cam 207 or is synchronized with the movement dorsad to change roller 301 and the first drive surface 205 and the second drive surface 209, regulate the lift of valve mechanism 100 with continuous variable ground, that is to say, actuating mechanism 400 drives the first cam 203 and the second cam 207 mirror movementses, thereby change the cooperation position that contacts of roller 301 and the first drive surface 205 and the second drive surface 209, thereby realize the purpose of adjusting valve lift amount.
Being understood that of value, above-mentioned " the first cam 203 and the second cam 207 are synchronized with the movement in opposite directions " can be understood as: the movement velocity equal and opposite in direction when the first cam 203 and 207 motions close to each other of the second cam and the first cam 203 and the 207 close motion of the second cam.Above-mentioned " the first cam 203 and the second cam 207 are synchronized with the movement dorsad " can be understood as: the first cam 203 and the second cam 207 move and the first cam 203 and the second cam 207 movement velocity equal and opposite in direction during away from motion away from each other.In brief, the first cam 203 and the second cam 207 mirror movementses.
Like this, because the first cam 203 and the second cam 207 mirror movementses, therefore roller 301 and the first drive surface 205 and roller 301 are that (mirror image) is relative with the cooperation position that contacts of the second drive surface 209, that is to say, suppose to remove this moment any one in the first cam 203 and the second cam 207, only by one of them driven roller 301, then the lift amount of valve mechanism 100 and two drive surface simultaneously during driven roller 301 lift amount of valve mechanism 100 be the same, this obviously is that appearance is intelligible for the ordinary skill in the art.
In addition, need to prove, in description of the invention, as do not have specified otherwise, preferably, take valve mechanism 100 as air inlet side valve mechanism 100 as example, shown in Figure 1 such as reference, in this embodiment, valve mechanism 100 is the valve mechanism 100 of air inlet side, and the valve mechanism 100 of exhaust side does not arrange according to an embodiment of the invention variable air valve lift apparatus 1000.Certainly, be understandable that, this valve mechanism 100 also can be exhaust valve, i.e. this variable air valve lift apparatus 1000 lift of also can be applicable to regulate exhaust valve.
Variable air valve lift apparatus 1000 according to the embodiment of the invention, solved well motor in the requirement to distribution of high speed high load working condition and low speed small load condition, reduce pumping loss, also realized simultaneously the continuous variable of valve lift, greatly improve the power performance and the economy performance of motor, reduced the discharging of the harmful gases such as HC, CO, CO2, NOx.
Below with reference to Fig. 1-Figure 24 detailed description actuating mechanism 400 according to some embodiments of the invention.
As shown in Figure 2, actuating mechanism 400 can comprise the first hydraulic valve block 401, the first driveshaft 411, the second driveshaft 441, elasticity reset device 431 and elastic component 421 according to an embodiment of the invention.
The first hydraulic valve block 401 is suitable for being fixed on the cylinder cap of motor, and for example the first hydraulic valve block 401 can removably be fastened on engine cylinder by bolt and covers, and certainly, the first hydraulic valve block 401 also can directly be welded on engine cylinder and cover.Such as Fig. 2, Fig. 9-shown in Figure 11, have the first valve pocket 402 and the second valve pocket 403 in the first hydraulic valve block 401, one end of each in the first valve pocket 402 and the second valve pocket 403 all opens wide and the other end all seals, in other words, such as Fig. 2 and shown in Figure 9, an end of the first valve pocket 402 opens wide and the other end sealing, and an end of the second valve pocket 403 opens wide and the other end sealing, the open end of the first valve pocket 402 and the second valve pocket 403 (for example, the right-hand member among Fig. 2 and Fig. 9) is towards the same side.
With reference to Fig. 2, Fig. 9-shown in Figure 11, the first valve pocket 402 is identical with the shape of the second valve pocket 403, in other words, the length of the first valve pocket 402 and the second valve pocket 403 is identical, shape of cross section is identical and sectional area equates, that is to say in the first valve pocket 402 and the second valve pocket 403 and (for example be full of liquid, hydraulic oil) time, the volume of its liquid equates.
The first valve pocket 402 and the second valve pocket 403 communicate with each other, for example according to a preferred embodiment of the present invention, such as Fig. 2 and shown in Figure 9, the bottom of the first valve pocket 402 and the second valve pocket 403 (left end among Fig. 2 and Fig. 9) communicates with each other, and liquid such as hydraulic oil in such two valve pockets can flow mutually.With reference to shown in Figure 2, (sign among Fig. 2 a), preferably, this liquid can be hydraulic oil to be full of liquid in the first valve pocket 402 and the second valve pocket 403.
With reference to shown in Figure 2, one end of the first driveshaft 411 (left end among Fig. 2) is that open end extend in the first valve pocket 402 from a described end of the first valve pocket 402, the first driveshaft 411 and the first valve pocket 402 are sealed and matched and can relatively move, that is to say, the operating principle of the operating principle of the first driveshaft 411 and the first valve pocket 402 and the injection cylinder of injector and injection putter is approximate, and namely the liquid of the first driveshaft 411 in interior removable and the first valve pocket 402 of the first valve pocket 402 can be from not leaking into the outside of the first hydraulic valve block 401 between the first driveshaft 411 and the first valve pocket 402.
As shown in Figure 2, be provided with the first shift fork 412 on the first driveshaft 411, preferably, the first shift fork 412 can be formed on the first driveshaft 411, as shown in Figure 2, the first shift fork 412 is arranged in the side away from the second cam 207 (Fig. 2 left side) of the first cam 203, and the first shift fork 412 is suitable for promoting the first cam 203 to the direction motion near the second cam 207.
Equally, one end of the second driveshaft 441 is that open end extend in the second valve pocket 403 from a described end of the second valve pocket 403, the second driveshaft 441 and the second valve pocket 403 are sealed and matched and can relatively move, that is to say, the operating principle of the second driveshaft 441 and the second valve pocket 403 is also approximate with the operating principle of injection cylinder and injection putter, and namely the liquid of the second driveshaft 441 in interior removable and the second valve pocket 403 of the second valve pocket 403 can be from not leaking into the outside of the first hydraulic valve block 401 between the second driveshaft 441 and the second valve pocket 403.Be provided with the second shift fork 442 on the second driveshaft 441, preferably, the second shift fork 442 can form on the second driveshaft 441, as shown in Figure 2, the second shift fork 442 is arranged in the side away from the first cam 203 (right side of Fig. 2) of the second cam 207, and the second shift fork 442 is suitable for promoting the second cam 207 to the direction motion near the first cam 203.
In brief, with reference to shown in Figure 2, the first shift fork 412 and the second shift fork 442 lay respectively at the outside of the first cam 203 and the second cam 207, and the first shift fork 412 and the second shift fork 442 are respectively applied to promote towards each other close direction synchronizing moving of the first cam 203 and the second cam 207.
Wherein, the other end of the second driveshaft 441 (right-hand member among Fig. 2) is suitable for driving it by hydraulic oil (b among Fig. 2) and moves.Particularly, hydraulic oil can drive the second driveshaft 441 to the direction motion of compression the second valve pocket 403, shown in Figure 2 such as reference, hydraulic oil can drive the second driveshaft 441 and be moved to the left, the second driveshaft 441 is moved to the left and can compresses the second valve pocket 403, since liquid for example hydraulic oil have can not compressed characteristic, therefore the liquid in the second valve pocket 403 can flow in the first valve pocket 402 by connectivity part, thereby increasing, the liquid in the first valve pocket 402 can promote the first driveshaft 411 towards the direction motion opposite with the second driveshaft 441 moving direction, and because the first valve pocket 402 is identical with the second valve pocket 403 shapes, therefore how many distances the second driveshaft 441 moves to the direction of compression the second valve pocket 403, then the first driveshaft 411 also mobile respective distance in the opposite direction.
In brief, with reference to shown in Figure 2, hydraulic oil drives the second driveshaft 441 and is moved to the left displacement L, and then the displacement that moves right of liquid driven the first driveshafts 411 in the first valve pocket 402 also is L.That is, the opposite but move distance of the moving direction of the moving direction of the first driveshaft 411 and the second driveshaft 441 equates, be appreciated that this moment the first driveshaft 411 and the second driveshaft 441 make mirror movements.In this process, can compress elasticity reset device 431 owing to the first driveshaft 411 moves right, thereby make elasticity reset device 431 accumulation of energys.
With reference to shown in Figure 2, elasticity reset device 431 is arranged in the other end (right-hand member of Fig. 2) of the first driveshaft 411 and is suitable for flexibly compressing the other end of the first driveshaft 411, thereby after above-mentioned driving process, if the first cam 203 and the second cam 207 need to do to deviate from motion to increase the distance between the first cam 203 and the second cam 207, and then change the first drive surface 205 and the second drive surface 209 and roller contact cooperation position the time, can reduce the total amount for the hydraulic oil that drives 441 actions of the second driveshaft, the elastic potential energy of deposit before thereby elasticity reset device 431 can discharge, reset to left movement to drive the first driveshaft 411, the second driveshaft 441 moves right and resets simultaneously.
As shown in Figure 2, elastic component 421 is arranged between the first cam 203 and the second cam 207, and elastic component 421 flexibly is pressed between the first cam 203 and the second cam 207.Preferably, elastic component 421 can be spring, and spring can be enclosed within the outside of camshaft 201, and the two ends of spring flexibly are pressed on respectively between the inner side surface of the first cam 203 and the second cam 207.
According to some embodiments of the present invention, as shown in Figure 2, actuating mechanism 400 comprises that also the second hydraulic valve block 451, the second hydraulic valve blocks 451 are suitable for being fixed on the cylinder cap, for example the second hydraulic valve block 451 can be bolted on the cylinder cap, can certainly be welded on the cylinder cap.Have the 3rd valve pocket 452 and the 4th valve pocket 453 in the second hydraulic valve block 451, with reference to Figure 12 and shown in Figure 13, an end of the 3rd valve pocket 452 and the 4th valve pocket 453 open wide and open end preferably towards the first hydraulic valve block 401.
As shown in Figure 2, the other end of the first driveshaft 411 extend in the 3rd valve pocket 452 from the open end of the 3rd valve pocket 452, elasticity reset device 431 is located in the 3rd valve pocket 452, elasticity reset device 431 can be spring, and the two ends of spring can be flexibly to be pressed on the end face of the other end of the first driveshaft 411 and on the bottom surface of the 3rd valve pocket 452, thereby spring can be laid in elastic potential energy when the first driveshaft 411 moves to the direction of compression the 3rd valve pocket 452, and provides elastic force when the first driveshaft 411 reverse reseting movement.
As shown in Figure 2, it is interior and removable with respect to the 4th valve pocket 453 that the other end of the second driveshaft 441 is engaged in the 4th valve pocket 453 hermetically, that is to say, the operating principle of the second driveshaft 441 and the 4th valve pocket 453 is also approximate with the operating principle of the injection cylinder of injector and injection putter, and namely the hydraulic oil of the second driveshaft 441 in interior removable and the 4th valve pocket 453 of the 4th valve pocket 453 can be from not leaking into the outside of the second hydraulic valve block 451 between the second driveshaft 441 and the 4th valve pocket 453.
Wherein hydraulic oil is suitable for entering in the 4th valve pocket 453 and moves to drive the second driveshaft 441, in other words, hydraulic oil is by entering the 4th valve pocket 453, thereby promote the second driveshaft 441 to the direction motion of compression the second valve pocket 403, and then drive the first cam 203 and the 207 close motions of the second cam.
And after engine operating condition changes, when needing the first cam 203 and the second cam 207 to deviate from motion, hydraulic oil in the 4th valve pocket 453 can partly flow out the 4th valve pocket 453, thereby under the driving of elasticity reset device 431 so that the first driveshaft 411 and the second driveshaft 441 move to initial position respectively, direction during namely with previous the first cam 203 and the 207 close motion of the second cam is opposite respectively, under the effect of elastic component 421, realize simultaneously the motion that deviates from of the first cam 203 and the second cam 207, and finally reach balance.
Wherein, need to prove, the initial position of above-mentioned the first driveshaft 411 and the second driveshaft 441 can be the position shown in Fig. 2, and this moment, the two ends of the first driveshaft 411 and the second driveshaft 441 were all concordant.
With reference to Fig. 2, Figure 12 and shown in Figure 13, the entrance point of the 4th valve pocket 453 is provided with control valve 461, this control valve 461 is used for the switching of control the 4th valve pocket 453, when control valve 461 is opened the 4th valve pocket 453, thereby hydraulic oil can by control valve 461 enter into promote in the 4th valve pocket 453 that the second driveshaft 441 moves or the 4th valve pocket 453 in hydraulic oil can flow out by the 4th valve pocket 453 parts, when control valve 461 was closed, the outer liquid force feed can't enter in the 4th valve pocket 453 and the hydraulic oil in the 4th valve pocket 453 also can't flow out the 4th valve pocket 453 by control valve 461 by control valve 461.
Preferably, according to one embodiment of present invention, control valve 461 can be two-position three way magnetic valve.Certainly, easily be understood that, control valve 461 of the present invention comprises two-position three way magnetic valve but is not limited to this, can realize opening and closing the 4th valve pocket 453 and be easy to be arranged in control valve structure in the 4th valve pocket 453 for other, all is applicable to the present invention.
Preferably, such as Fig. 2, Figure 12 and shown in Figure 13, be provided with the leakage hole 462 that is communicated with the 3rd valve pocket 452 on the second hydraulic valve block 451.By leakage hole 462 is set, when the first driveshaft 411 moves to the direction of compression the 3rd valve pocket 452, can avoid in the 3rd valve pocket 452 owing to sealing causes the air in the 3rd valve pocket 452 compressed, can improve thus the operation precision of actuating mechanism 400, the air of avoiding occurring in the 3rd valve pocket 452 is caused the first driveshaft 411 and the second driveshaft 441 to drive hard problem by excessive compression.
According to some embodiments of the present invention, actuating mechanism 400 also comprises displacement measuring device 463, the displacement that this displacement measuring device 463 is used for measuring the first driveshaft 411 and/or the second driveshaft 441.For example, preferably, because the first driveshaft 411 and the second driveshaft 441 are made mirror movements, the displacement that therefore is used for measuring one of the first driveshaft 411 and second driveshaft 441 by a displacement measuring device 463 is set just can obtain the displacement of another driveshaft indirectly.
By displacement measuring device 463 is set, can accurately obtain the displacement of the first driveshaft 411 and the second driveshaft 441, thereby obtain the information such as the moving direction of the first driveshaft 411 and the second driveshaft 441 and displacement distance, and then make things convenient for controller such as ECU by vehicle to control the total amount that hydraulic oil enters the 4th valve pocket 453, realize the accurate control of the first driveshaft 411 and 441 displacements of the second driveshaft, also can revise according to the result that displacement measuring device 463 records simultaneously the position of the first driveshaft 411 and the second driveshaft 441, make the position of the first driveshaft 411 and the second driveshaft 441 more accurate, thereby obtain the valve lift amount of required the best, improve the output of engine combustion efficiency and power.
Wherein, be understandable that, displacement measuring device 463 has been prior art, and is known by those of ordinary skill in the art, can be position transducer etc. such as displacement measuring device 463, not make specified otherwise for concrete structure and the working principle of displacement measuring device 463 here.
With reference to shown in Figure 2, according to one embodiment of present invention, the cross section of a described end of the first driveshaft 411 is the limit number greater than three polygon facet (the c part among Fig. 2), the cross section of a described end of the cross section of the first valve pocket 402 and the first driveshaft 411 is adaptive to prevent that the first driveshaft 411 from rotating with respect to the first valve pocket 402, in other words, take the cross section of the described end of the first driveshaft 411 as square as example, accordingly, the cross section of the first valve pocket 402 also corresponds to square, this end of such the first driveshaft 411 sealably is engaged in this first valve pocket 402 and can prevents that the first driveshaft 411 from rotating, thereby avoided guaranteeing that owing to the first driveshaft 411 rotates the generation that causes the situation that the first shift fork 412 separates with the first cam 203 actuating mechanism 400 is reliable.
Certainly, be understandable that, above-mentioned cross section take the first driveshaft 411 only is schematically to illustrate as square as example, can not be interpreted as it is to a kind of restriction of the present invention, apparently, for the ordinary skill in the art, on the basis of having read the above-mentioned disclosure of specification, can be pentagon, Hexagon etc. with the cross-sectional configuration of the described end of the first driveshaft 411 obviously.
Based on same reason, the cross section of a described end of the second driveshaft 441 is the limit number greater than three polygon facet (the c part among Fig. 2), and the cross section of a described end of the cross section of the second valve pocket 403 and the second driveshaft 441 is adaptive to prevent that the second driveshaft 441 from rotating with respect to the second valve pocket 403.Thus, can prevent that the second driveshaft 441 from freely rotating causes the second shift fork 442 to separate with the second cam 207 and affects actuating mechanism 400 normal operation.
Certainly, the present invention is not limited to this, in other embodiments of the present invention, actuating mechanism 400 also can arrange independent positioning part structure, be used for realization to the location of the first driveshaft 411 and the second driveshaft 441, prevent that the first driveshaft 411 and the second driveshaft 441 from freely rotating, as on the first driveshaft 411 and the second driveshaft 441, projection being set, the positioning part structure can be the long strip groove adaptive with projection, projection can be moved along the length direction of the first driveshaft 411 or the second driveshaft 441 in groove, but because the mating reaction of projection and groove can prevent that the first driveshaft 411 and the second driveshaft 441 from freely rotating.
According to a preferred embodiment of the present invention, such as Fig. 2, Figure 14-shown in Figure 16, the free end of the first shift fork 412 is provided with the first roller 471, the first roller 471 rollably pushes against the first cam 203, shown in Figure 2 such as reference, the outer circumferential face of the first roller 471 is the outside that rolling surface pushes against the first cam 203.The free end of the second shift fork 442 is provided with the second roller 472, the second rollers 472 and rollably pushes against the second cam 207, and shown in Figure 2 such as reference, the outer circumferential face of the second roller 472 is the outside that rolling surface pushes against the second cam 207.
By the first roller 471 and the second roller 472 being set to drive respective cams near motion, can reduce the wearing and tearing of roller and cam, make driving more reliable, increase the life-span of actuating mechanism 400.
Be appreciated that the first roller 471 and the second roller 472 can directly be pressed on respectively on the outer side surface of the first cam 203 and the second cam 207.Certainly, for the wearing and tearing that reduce the first cam 203 and the second cam 207, preferably, such as Fig. 2, Figure 17 and shown in Figure 180, the outside of the first cam 203 and the second cam 207 can be respectively arranged with platen 464, platen 464 is fixed on the outside of the first cam 203 or the second cam 207 and rotates with respective cams, the first roller 471 and the second roller 472 compress respectively the platen 464 of respective side accordingly, and be not directly to compress respective cams, can avoid like this roller directly to contact with respective cams and cause respective cams to be worn and torn aggravating, affect the life-span of cam.
According to other embodiments of the present invention, as shown in figure 19, actuating mechanism 400 also comprises clutch shaft bearing 221, clutch shaft bearing 221 be suitable for being enclosed within on the camshaft 201 and lay respectively at the first cam 203 and the first shift fork 412 and the second cam 207 and the second shift fork 442 between.That is to say, variable air valve lift apparatus comprises two clutch shaft bearings 221 according to an embodiment of the invention, one of them clutch shaft bearing 221 is located between the first cam 203 and the first shift fork 412, and another clutch shaft bearing 221 is located between the second cam 207 and the second shift fork 442.By between shift fork and cam (the first cam 203 and the second cam 207) clutch shaft bearing 221 being set, thereby it is mobile vertically to be convenient to the shift fork driving cam, avoids between shift fork and the cam directly contact friction to affect the life-span of cam.In brief, this embodiment is by arranging clutch shaft bearing 221, thereby compares with above-described embodiment, and platen 464 and the first roller 471 and the second roller 472 in above-described embodiment can be set.
Alternatively, as shown in figure 19, clutch shaft bearing 221 comprises inner ring 223 and outer ring 225, inner ring 223 is provided with roll structure between inner ring 223 and the outer ring 225 so that can rotate relatively with outer ring 225, inner ring 223 and the first cam 203 or the second cam 207 preferably fit tightly together, and outer ring 225 and the first shift fork 412 or the second shift fork 442 preferably fit tightly together.
As shown in figure 19, the relative inner of the first cam 203 and the second cam 207 all is formed with the locating slot 211 that is suitable for locating elastic component 421, in other words, the first cam 203 is provided with locating slot 211 towards a side of the second cam 207, the second cam 207 also is formed with locating slot 211 towards a side of the first cam 203, and these two locating slots 211 are used for installing location elastic component 421 such as spring.
Certainly, be understandable that, elastic component 421 also can directly be positioned on the camshaft 201, for example according to one embodiment of present invention, variable air valve lift apparatus can also comprise locating piece (scheming not shown), this locating piece is used for elastic component 421 is fixed on bent axle such as spring, and for example this locating piece can be screw or buckle structure, and its fixed position can be positioned at the axial centre of elastic component 421.
Below with reference to Fig. 1-Figure 24 the according to an embodiment of the invention course of action of actuating mechanism 400 is described simply.
With reference to shown in Figure 2, the position of the first driveshaft 411 shown in Fig. 2 and the second driveshaft 441 can be the initial position of the first driveshaft 411 and the second driveshaft 441, and this moment, the two ends of the first driveshaft 411 and the second driveshaft 441 were preferably concordant.But, should be appreciated that the present invention is not limited to this.
When needs are regulated the lift amount of valve mechanism, for example increase the lift amount of valve mechanism, this moment, the first cam 203 and the second cam 207 needed near the motion certain distance.
As shown in Figure 2, thus, control valve 461 is opened, the outer liquid force feed can enter in the 4th valve pocket 453 by control valve 461, because the other end of the second driveshaft 441 seals the 4th valve pocket 453, therefore along with the entering of hydraulic oil, the oil pressure in the 4th valve pocket 453 increase, and hydraulic oil will promote the second driveshaft 441 to left movement.
The space in the second valve pocket 403 is compressed in the second driveshaft 441 athletic meeting left, so that the liquid in the second valve pocket 403 enters in the first valve pocket 402 by connected part, lasting movement along with the second driveshaft 441, liquid in the second valve pocket 403 can continue to be transferred in the first valve pocket 402, such the first valve pocket 402 interior liquid constantly increase, this liquid can promote the first driveshaft 411 and move right, and this moment, the right-hand member of the first driveshaft 411 can promote elasticity reset device 431 accumulation of energys.
In this process, the second driveshaft 441 drives the second shift fork 442 and is moved to the left, the second shift fork 442 promotes the second cam 207 to left movement by its free-ended second roller 472, meanwhile, the first driveshaft 411 drives the first shift fork 412 and moves right, the first shift fork 412 promotes the first cam 203 by its free-ended first roller 471 and moves right, realize the move toward one another of the first cam 203 and the second cam 207, and elastic component 421 is compressed, when the first cam 203 and the second cam 207 move toward one another, the movement velocity of the first cam 203 and the second cam 207 is identical and moving direction is opposite, mirror movements relation.
On this basis, when the lift amount of needs change valve mechanism for example reduces lift amount, control valve 461 can be opened so that the hydraulic oil in the 4th valve pocket 453 partly releases, because the cause that the hydraulic oil in the 4th valve pocket 453 releases, so that the first driveshaft 411 and the second driveshaft 441 are in nonequilibrium state, the elastic potential energy of deposit before elasticity reset device 431 can discharge, promote the first driveshaft 411 to left movement (with moving direction is opposite before) thus make the first driveshaft 411 compress conversely the first valve pocket 402, liquid in the first valve pocket 402 comes back in the second valve pocket 403 by connected part, volume in the second valve pocket 403 will increase, thereby under the promotion of liquid, so that the second driveshaft 441 moves right (with moving direction is opposite before), and finally reach new balance.
In this process, the elastic potential energy of deposit before elastic component 421 will discharge, drive the first cam 203 and the second cam 207 moves dorsad, during motion the first cam 203 constantly (can by platen 464) compress the first roller 471, the second cam 207 constantly (can by platen 464) compresses the second roller 472, until the first driveshaft 411 and the second driveshaft 441 reach new state of equilibrium again.
In the process of regulating, the controller of vehicle such as ECU can select suitable valve lift amount according to the motor current working, the first driveshaft 411 and the 441 pairs of valve lift amount that should select of the second driveshaft have a specific activation point, enter the total amount realization of the hydraulic oil in the 4th valve pocket 453 to the accurate control of the first driveshaft 411 and the second driveshaft 441 positions by control, wherein displacement transducer can feed back the concrete displacement information of the first driveshaft 411 and the second driveshaft 441, ECU can adjust and/or revise the particular location of the first driveshaft 411 and the second driveshaft 441 according to this displacement information, thereby improves the accuracy of control.
1-Figure 24 describes cam rocker arm assembly according to some embodiments of the invention in detail with reference to the accompanying drawings.
According to one embodiment of present invention, the cam rocker arm assembly comprises above-mentioned camshaft mechanism 200 and rocker arm body 300.
With reference to Figure 22-shown in Figure 24, rocker arm body 300 comprises that also air valve bridge 311 and 321, two fixed plates of two fixed plates 321 are parallel and is located at relative to one another on the air valve bridge 311, and roller 301 is folded between two fixed plates 321 pivotly.
Owing to being provided with the cause of air valve bridge 311, so the bottom of each air valve bridge 311 can be provided with a plurality of valve mechanisms 100, and namely an air valve bridge 311 can drive a plurality of valve mechanisms 100 and moves simultaneously.In related domain, the intake and exhaust structures that at present many employings go with each other all the time, therefore preferably, each air valve bridge 311 preferably drives two valve mechanisms 100, more specifically, valve mechanisms 100 of two air inlet sides of each air valve bridge 311 preferred driving.
Like this, can simplify the structure of variable air valve lift apparatus 1000, make things convenient for variable air valve lift apparatus 1000 to be arranged in the cylinder cap 2000, and improve drive efficiency.Certainly, alternatively, an air valve bridge 311 also can only drive a valve mechanism 100, and perhaps an air valve bridge 311 drives three or more valve mechanisms 100, and these technological schemes all fall within the scope of protection of the present invention.
According to one embodiment of present invention, roller 301 is folded between two fixed plates 321 pivotly by the bearing pin 331 that passes two fixed plates 321.Preferably, be provided with the second bearing (scheming not shown) between roller 301 and the bearing pin 331, can reduce like this friction between roller 301 and the bearing pin 331, improve the life-span of roller 301.
In another embodiment of the present invention, roller 301 is folded between two fixed plates 321 pivotly by the bearing pin 331 that passes two fixed plates 321, roller 301 is integrally formed with bearing pin 331, preferably, can be provided with the 3rd bearing between bearing pin 331 and fixed plate 321.
Preferably, be provided with limit structure (scheming not shown) on the bearing pin 331, this limit structure is used for the axially restriction roller 301 at bearing pin 331, prevents that roller 301 from moving axially, and limit structure can be spacing preiection.
With reference to shown in Figure 22, two transverse sides and two fixed plates 321 of roller 301 are spaced apart respectively.Be understandable that, this laterally is the thickness direction of roller 301.Thus, roller 301 is spaced apart with fixed plate 321, can avoid the two to rub, and affects the life-span of roller 301.
According to one embodiment of present invention, be provided with the reinforcement structure on the air valve bridge 311, this reinforcement structure can be stiffening rib, and this stiffening rib can be a plurality of and be evenly distributed on the air valve bridge 311, to increase better the intensity of air valve bridge 311.Stiffening rib and air valve bridge 311 can be the one cast moldings, certainly, are understandable that, stiffening rib also can be welded on the air valve bridge 311.
With reference to Figure 22 and shown in Figure 24, be configured with the first roller cambered surface 303 adaptive with the first drive surface 205 on the roller 301, and also be configured with the second roller cambered surface 305 adaptive with the second drive surface 209 on the roller 301.Like this, cooperate with the chamfered portion of the first drive surface 205 and the second roller cambered surface 305 when cooperating with the chamfered portion of the second drive surface 209 in the first roller cambered surface 303, this moment, cam (the first cam 203 and the second cam 207) contacted for the line line with roller 301 in theory.Can be provided with arc surface 307 between the first roller cambered surface 303 and the second roller cambered surface 305, when this arc surface 307 cooperated with the planar section of the first drive surface 205 and the second drive surface 209, the lift amount of valve mechanism 100 was maximum.Certainly, the present invention is not limited to this, in other embodiments of the invention, on the roller 301 with the first drive surface 205 and the second drive surface 209 adaptive also can be inclined-plane or other profile.
The working procedure of variable air valve lift apparatus 1000 is in accordance with a preferred embodiment of the present invention described below with reference to Fig. 1-Figure 24.
At first with reference to Fig. 3 and Fig. 4, it is the zero lift position that the first cam 203 among these two figure, the second cam 207 contact with roller 301 that the position that cooperates can be understood as, this moment, camshaft 201 drive the first cams 203 and the second cam 207 rotated, the first cam 203 and the second cam 207 can press-on roller 301, be that rocker arm body 300 can wholely not swing around fulcrum structure 341, therefore the lift amount of valve mechanism 100 is zero at this moment, be the suction port of valve mechanism 100 airtight firing chambers, realize intelligent cylinder deactivation.
Secondly, with reference to Fig. 5 and shown in Figure 6, after engine operating condition changes, for example engine speed improves, this moment, motor needed less air inflow, hydraulic oil enters in the 4th valve pocket 453 with 441 actions of direct driving the second driveshaft by control valve 461, simultaneously Indirect driven the first driveshaft 411 actions (process that specifically drives is referring to above-mentioned description for actuating mechanism 400 course of action), so that the first shift fork 411 can certainly be a clutch shaft bearing 221 by a platen 464() pushing the first cam 203, the second shift fork 442 can certainly be another clutch shaft bearing 221 by another platen 464() pushing the second cam 207, so that these two cams are close, thereby change the cooperation position that contacts of roller 301 and the first drive surface 205 and the second drive surface 209.
With reference to Fig. 5 and shown in Figure 6, it is little lift location that the first cam 203 among these two figure, the second cam 207 can be understood as with the position that contacts cooperation of roller 301, this moment, camshaft 201 drive the first cams 203 and the second cam 207 rotated, the first cam 203 and the second cam 207 are with press-on roller 301, so that rocker arm body 300 integral body swing by a small margin around fulcrum structure 341, thereby drive valve mechanism 100 and open suction port, therefore the lift amount of valve mechanism 100 is less at this moment, is suitable for the low engine speed small load condition.
At last, with reference to Fig. 7 and shown in Figure 8, after engine operating condition further changes, for example the rotating speed of motor further improves, this moment, motor needed larger air inflow, more hydraulic oil enters in the 4th valve pocket 453 with 441 actions of direct driving the second driveshaft by control valve 461, simultaneously Indirect driven the first driveshaft 411 actions (concrete driving principle is with above-mentioned consistent), so that the first shift fork 411 can certainly be a clutch shaft bearing 221 by a platen 464() further push the first cam 203, the second shift fork 442 can certainly be another clutch shaft bearing 221 by another platen 464() further push the second cam 207, so that these two cams are more close, thereby change the cooperation position that contacts of roller 301 and the first drive surface 205 and the second drive surface 209.
With reference to Fig. 7 and shown in Figure 8, it is the high-lift position that the first cam 203 among these two figure, the second cam 207 can be understood as with the position that contacts cooperation of roller 301, this moment, camshaft 201 drive the first cams 203 and the second cam 207 rotated, the first cam 203 and the second cam 207 are with press-on roller 301, so that rocker arm body 300 integral body are around fulcrum structure 341 amplitude swings, thereby drive valve mechanism 100 and open suction port, therefore the lift amount of valve mechanism 100 is larger at this moment, is suitable for the high engine speeds high load working condition.
In this process, roller 301 can cooperate with the planar section of the first drive surface 205 and the planar section of the second drive surface 209, certainly, be understandable that, the invention is not restricted to this, the first drive surface 205 and the second drive surface 209 also can be the inclined-plane, and then in the above-mentioned whole adjustment process, roller 301 all contacts cooperation with inclined-plane (the first drive surface 205 and the second drive surface 209).
When the operating mode of motor becomes low speed or small load condition again again, hydraulic oil can release from the 4th valve pocket 453 interior parts by control valve 461, this moment is under the elastic force effect of elastic component 421 such as spring, the first cam 203 and the second cam 207 will move dorsad, increase the distance of the two, thereby what change roller 301 and the first drive surface 205 and the second drive surface 209 contacts cooperation position (for example becoming above-mentioned little lift location again), and then the lift of reduction valve mechanism 100, make valve lift corresponding with the operating mode of motor.
In brief, according to a preferred embodiment of the present invention, enter the oil mass of the hydraulic oil in the 4th valve pocket 453 by control, can realize the first cam 203 and the second cam 207 near or away from (cooperate with elastic component 421), the first cam 203 and the second cam 207 near or away from rear, the first drive surface 205 on roller 301 and the first cam 203 and the second cam 207 and the cooperation position that contacts of the second drive surface 209 change, thereby can obtain valve lift amount required and that adapt with the motor current working.
For the first drive surface 205 on the first cam 203, the second drive surface 209 and the first roller cambered surface 303 on the roller 301, the second roller cambered surface 305 and arc surface 307 on the second cam 207, can come its line style of adaptability design according to different motors, thereby be under the different operating modes at motor, by the contact cooperation position of change roller 301 with the first cam 203 and the second cam 207, realize the adaptability adjusting of valve lift, to satisfy the motor current working, this obviously is that appearance is intelligible for the ordinary skill in the art.
In addition, need to prove, in description of the invention, above-mentioned with a camshaft 201 take and on first cam 203 and the second cam 207 as example only is schematically to illustrate, can not be interpreted as it is to a kind of restriction of the present invention.Two air inlet side valve mechanisms 100 of an above-mentioned camshaft 201, first cam 203 and the second cam 207 preferred corresponding cylinders, those of ordinary skill in the art is on the basis of having read the above-mentioned disclosure of specification, conventional techniques means and common practise in conjunction with related domain, obviously can many group the first cams 203 and the second cam 207 be set at a camshaft 201, for example take the motor of four-cylinder as example, four pairs of the first cams 203 and the second cam 207 can be set obviously.
Generally speaking, be used for according to an embodiment of the invention the variable air valve lift apparatus 1000 of motor, can have following advantage:
1) variable air valve lift apparatus 1000 of the embodiment of the invention can be realized the continuous variable of valve lift;
2) variable air valve lift apparatus 1000 of the embodiment of the invention can be regulated valve opening duration and switching according to engine operating condition constantly, makes charging efficiency the best under each operating mode of motor, is of value to power character, Economy and the discharging of motor;
3) variable air valve lift apparatus 1000 of the embodiment of the invention is applicable to petrol engine and the diesel engine of any camshaft actuated valve mechanism 100, and is applied widely, is beneficial to Negative valve overlap, emptying supercharging, cylinder stopping technique and the HCCI technology of realizing;
4) variable air valve lift apparatus 1000 of the embodiment of the invention cooperates the VVT use can realize port timing and the full variable technique of valve lift;
5, the compact structure of the variable air valve lift apparatus 1000 of the embodiment of the invention does not increase the motor height, is convenient to arrange, cost is low.
Below the simple motor of describing according to the embodiment of the invention.
Motor comprises according to the actuating mechanism 400 of describing in the above embodiment of the present invention according to an embodiment of the invention.
Therefore the motor of the embodiment of the invention has the advantages such as power character is strong, fuel economy is good owing to adopting the cause of the actuating mechanism 100 of above-mentioned variable air valve lift apparatus 1000.
Need to prove, all be prior art according to other configuration example of the motor of the embodiment of the invention such as body group, connecting rod, cooling system, lubrication system etc., and known by those of ordinary skill in the art, can adopt the part identical or close with prior art for these, describe in detail no longer one by one herein.
Below the simple vehicle of describing according to the embodiment of the invention.
Vehicle comprises motor according to the above embodiment of the present invention according to an embodiment of the invention.
According to the vehicle of the embodiment of the invention owing to adopting the cause of above-mentioned motor, so good dynamic property, fuel economy is good, discharges low.
Need to prove, all be prior art according to other configuration example of the vehicle of the embodiment of the invention such as speed changer, braking system, transmission system, vehicle body etc., and known by those of ordinary skill in the art, can adopt the part identical or close with prior art for these, describe in detail no longer one by one herein.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiments or example.In addition, those skilled in the art can engage different embodiments or the example of describing in this specification and make up.
Although the above has illustrated and has described embodiments of the invention, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. actuating mechanism that is used for the variable air valve lift apparatus of motor, described variable air valve lift apparatus comprises camshaft mechanism, and described camshaft mechanism comprises camshaft, the first cam and the second cam, it is characterized in that, and described actuating mechanism comprises:
The first hydraulic valve block, described the first hydraulic valve block is suitable for being fixed on the cylinder cap of described motor, have the first valve pocket and the second valve pocket in described the first hydraulic valve block, one end of each in described the first valve pocket and described the second valve pocket all opens wide and the other end all seals, described the first valve pocket is identical with described second valve cavity shape and communicate with each other, and is filled with liquid in described the first valve pocket and described the second valve pocket;
The first driveshaft, an end of described the first driveshaft extend in described the first valve pocket from a described end of described the first valve pocket, and described the first driveshaft and described the first valve pocket are sealed and matched and can relatively move, and are provided with the first shift fork on described the first driveshaft;
The second driveshaft, one end of described the second driveshaft extend in described the second valve pocket from a described end of described the second valve pocket, described the second driveshaft and described the second valve pocket are sealed and matched and can relatively move, be provided with the second shift fork on described the second driveshaft, the other end of described the second driveshaft is suitable for driving it by hydraulic oil and moves;
Elasticity reset device, described elasticity reset device are positioned at the other end of described the first driveshaft and are suitable for flexibly compressing the other end of described the first driveshaft;
Elastic component, described elastic component are suitable for flexibly being pressed between described the first cam and described the second cam.
2. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 1, it is characterized in that, also comprise: the second hydraulic valve block, described the second hydraulic valve block is suitable for being fixed on the described cylinder cap, have the 3rd valve pocket and the 4th valve pocket in described the second hydraulic valve block, the other end of described the first driveshaft extend in described the 3rd valve pocket, described elasticity reset device is located in described the 3rd valve pocket, it is interior and removable with respect to described the 4th valve pocket that the other end of described the second driveshaft is engaged in described the 4th valve pocket hermetically, and wherein said hydraulic oil is suitable for entering in described the 4th valve pocket and moves to drive described the second driveshaft.
3. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that, the entrance point of described the 4th valve pocket is provided with control valve.
4. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that, is provided with the leakage hole that is communicated with described the 3rd valve pocket on described the second hydraulic valve block.
5. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that, also comprises be used to the displacement measuring device of measuring described the first driveshaft and/or described the second driveshaft displacement.
6. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that,
The cross section of a described end of described the first driveshaft is the limit number greater than three polygon facet, and the cross section of a described end of the cross section of described the first valve pocket and described the first driveshaft is adaptive to prevent that described the first driveshaft from rotating with respect to described the first valve pocket;
The cross section of a described end of described the second driveshaft is the limit number greater than three polygon facet, and the cross section of a described end of the cross section of described the second valve pocket and described the second driveshaft is adaptive to prevent that described the second driveshaft from rotating with respect to described the second valve pocket.
7. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that, described elasticity reset device is spring.
8. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2 is characterized in that,
The free end of described the first shift fork is provided with the first roller, and described the first roller rollably pushes against described the first cam;
The free end of described the second shift fork is provided with the second roller, and described the second roller rollably pushes against described the second cam;
Wherein, described the first roller and described the second roller lay respectively at the outside of described the first cam and described the second cam.
9. the actuating mechanism of the variable air valve lift apparatus for motor according to claim 2, it is characterized in that, also comprise clutch shaft bearing, described clutch shaft bearing be suitable for being enclosed within on the described camshaft and lay respectively at described the first cam and described the first shift fork and described the second cam and described the second shift fork between.
10. a motor is characterized in that, comprises according to claim 1 in-9 the actuating mechanism of each described variable air valve lift apparatus for motor.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07238820A (en) * | 1994-02-25 | 1995-09-12 | Ofic Co | Variable left quantity valve drive device |
| WO2003083269A1 (en) * | 2002-03-28 | 2003-10-09 | Stefan Battlogg | Device for converting a rotational displacement into a displacement back and forth |
| DE102007061353A1 (en) * | 2007-12-21 | 2009-06-25 | Audi Ag | Valve drive unit for improving the thermodynamics of combustion engines comprises units for axially moving cam supports on a camshaft and having a peripheral endless groove and a meshing element which moves along the groove |
| DE102010060649A1 (en) * | 2010-09-01 | 2012-03-01 | Hyundai Motor Co. | Variable valve lift |
| CN102720592A (en) * | 2012-06-30 | 2012-10-10 | 长城汽车股份有限公司 | Camshaft assembly of engine with variable valve opening duration |
| CN202810988U (en) * | 2012-09-05 | 2013-03-20 | 哈尔滨工程大学 | Continuously variable valve timing mechanism |
-
2013
- 2013-07-30 CN CN201310325992.0A patent/CN103362587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07238820A (en) * | 1994-02-25 | 1995-09-12 | Ofic Co | Variable left quantity valve drive device |
| WO2003083269A1 (en) * | 2002-03-28 | 2003-10-09 | Stefan Battlogg | Device for converting a rotational displacement into a displacement back and forth |
| DE102007061353A1 (en) * | 2007-12-21 | 2009-06-25 | Audi Ag | Valve drive unit for improving the thermodynamics of combustion engines comprises units for axially moving cam supports on a camshaft and having a peripheral endless groove and a meshing element which moves along the groove |
| DE102010060649A1 (en) * | 2010-09-01 | 2012-03-01 | Hyundai Motor Co. | Variable valve lift |
| CN102720592A (en) * | 2012-06-30 | 2012-10-10 | 长城汽车股份有限公司 | Camshaft assembly of engine with variable valve opening duration |
| CN202810988U (en) * | 2012-09-05 | 2013-03-20 | 哈尔滨工程大学 | Continuously variable valve timing mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103362587B (en) | 2015-08-05 |
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