CN103742220B - For the valve actuating mechanism of engine - Google Patents
For the valve actuating mechanism of engine Download PDFInfo
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- CN103742220B CN103742220B CN201310749723.7A CN201310749723A CN103742220B CN 103742220 B CN103742220 B CN 103742220B CN 201310749723 A CN201310749723 A CN 201310749723A CN 103742220 B CN103742220 B CN 103742220B
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- slide block
- push rod
- valve
- rod
- actuating mechanism
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Abstract
The invention discloses a kind of valve actuating mechanism for engine. This valve actuating mechanism comprises: valve mechanism; Drive valve and on it, be provided with the rocker arm assembly of roller; First end is connected with rocker arm assembly and the second end is located at the linking arm in the body group of engine; Be located on rocker arm assembly and be limited with the slide block group of chute; The first and second camshafts; Push-rod assembly comprises the push-rod assembly of push rod and elastic component, the two ends of push rod are located on rocker arm assembly around pivot axis, on push rod, be provided with push rod projection and push rod slide block, push rod slide block is engaged in rotationally push-rod assembly in chute and in the time that push rod slide block is resisted against one end of chute around pivot axis and is suitable for and rocker arm assembly synchronization action, one end of elastic component flexibly compress that push rod projection and the other end and slide block assembly close so that the first cam against roller and the second cam against push rod; And phase-regulating mechanism. Valve actuating mechanism of the present invention can be realized the secondary opening of valve, can also extend the lasting time of valve opening simultaneously.
Description
Technical field
The present invention relates to automobile construction field, especially relate to a kind of valve actuating mechanism for engine.
Background technology
The valve actuating mechanism of engine is for driving the switching of valve, and its port timing is generally based on a certain narrow and small operating mode model of engineThe local optimum of enclosing and determining, immobilize in the course of the work, and valve motion rule is determined by cam profile completely. ButBe because cam profile is single, can not adjust valve motion rule according to engine actual condition conditions of demand, can not be simultaneouslyAdapt to engine different operating condition, oil consumption is higher, discharges poorly, is unfavorable for improving the power performance of engine simultaneously,And general lift range variable technology can only change valve opening maximum lift, shifts gears more single, and complex structure,Parts are many, control loaded down with trivial details.
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, of the present inventionAn object is to propose a kind of secondary opening that can realize valve, can also extend the lasting time of valve opening simultaneously,And the valve actuating mechanism for engine simple in structure, parts are few.
According to the valve actuating mechanism for engine of the embodiment of the present invention, comprising: valve mechanism; Rocker arm assembly, described rocking armThe substructure of assembly has driving profile, and described driving profile is suitable for driving the valve of valve mechanism along being parallel to valve center lineDirection motion, on described rocker arm assembly, be provided with roller; Linking arm, the first end of described linking arm and described rocker arm assemblyBe connected pivotly, the second end of described linking arm is located in the body group of described engine pivotly; Slide block group, described inSlide block group is located on described rocker arm assembly, in described slide block group, is limited with chute; The first camshaft and the second camshaft, described inThe first camshaft has the first cam and described the second camshaft has the second cam; Push-rod assembly, described push-rod assembly comprisesPush rod and elastic component, the two ends of described push rod are located on described rocker arm assembly pivotly around pivot axis, on described push rod, establishBe equipped with push rod projection and push rod slide block, described push rod slide block in described pivot axis is engaged in described chute rotationally andDescribed in when described push rod slide block is resisted against one end of described chute, push-rod assembly is suitable for and described rocker arm assembly synchronization action, described inOne end of elastic component flexibly compress that described push rod projection and the other end and described slide block assembly close so that described the first cam againstDescribed roller and described the second cam are against described push rod; And for regulating described the first camshaft and described the second camshaftThe phase-regulating mechanism of relative phase.
Can realize secondary opening of air valve and valve opening duration according to the valve actuating mechanism for engine of the embodiment of the present inventionThe object increasing, in the time realizing secondary opening of air valve, can realize scavenging function or improve internal EGR, described in passing through simultaneouslyCooperatively interacting of rocker arm assembly, described slide block group and described push-rod assembly eliminated between described the first cam and described rollerGap, described the second cam and described push rod between gap and valve clearance, avoided described valve actuating mechanism to moveIn journey, there is slip phenomenon, further promoted stability. In addition, according to its rocking arm set of the valve actuating mechanism of the embodiment of the present inventionPart is simpler, compact, and parts are few, and cost is low.
In addition, according to the valve actuating mechanism for engine of the embodiment of the present invention, can also there is following additional technical feature:
According to some embodiments of the present invention, described rocker arm assembly comprises: two rocking arm portions and middle arm portions, described twoIndividual rocking arm portion be located at respectively described in the middle of the two ends of arm portions, described two rocking arm portions are oppositely arranged and along described first and theAxially being spaced apart from each other of two camshafts.
According to some embodiments of the present invention, described rocking arm portion also comprises: drive division, described drive division is located at described in each and shakesThe bottom of arm, described drive division is configured to plates and bottom surface is that cambered surface is to form described driving profile.
According to some embodiments of the present invention, the two ends of described middle arm portions are respectively arranged with described roller and described centreTwo rollers of arm portions and this are connected by the first bearing pin.
According to some embodiments of the present invention, described push rod comprises: the base portion body of rod and the end body of rod, the described end body of rod respectivelyBe located at the two ends of the described base portion body of rod, the relative inner of described two end bodies of rod is respectively arranged with described push rod projection and instituteState push rod slide block, between each described end body of rod and corresponding rocking arm portion, be provided with a described slide block group, described slide blockThe free end of group, the described end body of rod and described rocking arm portion are connected by the second bearing pin.
According to some embodiments of the present invention, described slide block group comprises: the first sub-slide block being oppositely arranged and the second sub-slide block,The two ends of described the first sub-slide block respectively with the two ends of described the second sub-slide block spaced apart with the two ends at described the first sub-slide block withBetween the two ends of described the second sub-slide block, limit respectively a described chute; Described push rod slide block comprises two sub-push rod slide blocks,Two sub-push rod slide blocks of each described push rod slide block are located at respectively in two chutes that respective slide group limits accordingly.
According to some embodiments of the present invention, the shape of described the first and second sub-slide blocks is identical and about described the second bearing pin footpathTo being arranged symmetrically with, the distance between described the first sub-slide block and described the second sub-slide block and the equal diameters of described the second bearing pin.
According to some embodiments of the present invention, the two ends enlarged-diameter of described the second bearing pin is to form enlarged-diameter portion, Qi ZhongrenThe described enlarged-diameter portion that anticipates is located in the slide block group of this side between this enlarged-diameter portion and this side rocking arm portion; Or described inSlide block bond pads is fixed in described rocking arm portion; Or described slide block group is fixed on described rocking arm by bolt, pin or rivetIn portion.
According to some embodiments of the present invention, described elastic component is spring, and one end of described spring is bent into described push rod protrudingThe circular arc hook portion of post adaptation, described ring spring around the other end of at least one circle of described the second bearing pin and described spring be bent intoThe shape of described slide block group adaptation with clip at least a portion outer peripheral face of described slide block group.
According to some embodiments of the present invention, described phase-regulating mechanism is phaser.
Brief description of the drawings
Fig. 1 is according to the structural representation of the valve actuating mechanism for engine of the embodiment of the present invention.
Fig. 2 is according to the side view of the valve actuating mechanism for engine of the embodiment of the present invention.
Fig. 3 is according to the structural representation of the rocker arm assembly of the valve actuating mechanism for engine of the embodiment of the present invention and slide block group.
Fig. 4 is according to the structural representation of the push-rod assembly of the valve actuating mechanism for engine of the embodiment of the present invention.
Fig. 5 is according to the structural representation of the push rod of the valve actuating mechanism for engine of the embodiment of the present invention.
Fig. 6 is according to the structural representation of the elastic component of the valve actuating mechanism for engine of the embodiment of the present invention.
Fig. 7 is the partial sectional view of the valve actuating mechanism shown in Fig. 1 in the time that push rod slide block is resisted against one end of chute.
The partial sectional view of Fig. 8 when to be the valve actuating mechanism shown in Fig. 1 spaced apart in one end of push rod slide block and chute
Reference numeral:
Valve actuating mechanism 100,
Valve mechanism 1, valve 11,
Rocker arm assembly 2, rocking arm portion 22, middle arm portions 24, drive division 23, drive profile 231,
Roller 31,
The first camshaft 41, the first cam 411,
The second camshaft 42, the second cam 421,
Linking arm 5,
Valve rocker 61, valve rocker roller 611,
Slide block group 7, the first sub-slide block 71, the second sub-slide block 72, push-rod assembly 8,
Push rod 81, the base portion body of rod 801, the end body of rod 802,
Push rod projection 811, push rod slide block 812, sub-push rod slide block 8121,
Elastic component 82, circular arc hook portion 821,
The first bearing pin 91, the second bearing pin 92, enlarged-diameter portion 921,
Support 10,
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, wherein identical from start to finishOr similarly label represents same or similar element or has the element of identical or similar functions. Below by retouching with reference to accompanying drawingThe embodiment stating is exemplary, is 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 ", " longitudinally ", " laterally ", " length ", " width "," thickness ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ",Orientation or position relationship that " outward ", " clockwise ", " counterclockwise " etc. indicate are based on orientation shown in the drawings or position relationship,Be only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specificOrientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importanceOr the implicit quantity that indicates indicated technical characterictic. Thus, the feature that is limited with " first ", " second " can be expressedOr impliedly comprise one or more these features. In description of the invention, the implication of " multiple " is two or twoAbove, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing "Should be interpreted broadly Deng term, for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can beMechanical connection can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be twoThe interaction relationship of the connection of individual element internal or two elements. For the ordinary skill in the art, Ke YigenUnderstand above-mentioned term concrete meaning in the present invention according to concrete condition.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D scoreCan comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but logicalCross the other feature contact between them. And, First Characteristic Second Characteristic " on ", " top " and " onFace " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher thanTwo features. First Characteristic Second Characteristic " under ", " below " and " below " comprise that First Characteristic is the second spyUnder levying and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
The body group of engine is the support of engine, is the matrix of toggle, valve actuating mechanism and the assembling of each system.In this area, usually, body group is mainly made up of cylinder block, cylinder head, cylinder head gasket and oil sump etc., oilDrain pan is generally located at the bottom of cylinder block, and cylinder head is located at the top of cylinder block, the end face that cylinder head gasket is located at cylinder block withBetween the bottom surface of cylinder head, for sealing the gap between the two.
Cylinder head forms combustion chamber together with cylinder with top land, the top of combustion chamber has air inlet and exhaust outlet, valveThe valve of mechanism is located in cylinder cap and sealing air inlet and exhaust outlet. For existing general engine, adopt two moreEnter the valve form of scene 2, minority also has the valve form that adopts one-in-and-one-out or three to enter scene 2.
For same engine, generally all there is multiple different operating mode, for example low speed small load condition, high speed load greatlyOperating modes etc., when engine is under different operating modes, engine externally moment of torsion and the power of output is different, simultaneously engineThe content of the pernicious gas of discharge is also different, and the valve actuating mechanism of engine is according to the working cycles of carrying out in each cylinder and ignitingThe requirement of order, timing opens and closes inlet valve and exhaust valve.
Usually, valve actuating mechanism can regulate the lift amount of valve, but regulative mode is single, can not meet well useRequirement. Can realize the secondary opening of valve according to the valve actuating mechanism of the embodiment of the present invention, simultaneously also can proper extension valveOpening time, regulative mode is various, thereby meets better the requirement of different operating modes.
Be appreciated that according to the valve actuating mechanism of the embodiment of the present invention and can, for driving into the valve event of gas side, certainly also canFor driving the valve event of exhaust side, or be used in air inlet side and exhaust side to drive corresponding valve event simultaneously. PreferablyGround,, in the following description, joins with this for driving the valve event of exhaust side according to the valve actuating mechanism of the embodiment of the present inventionMechanism of qi structure is example for driving the valve of exhaust side.
Describe in detail according to the valve actuating mechanism 100 for engine of the embodiment of the present invention below with reference to Fig. 1-Fig. 8.
Can comprise valve mechanism 1, rocker arm assembly 2, the first camshaft 41 according to the valve actuating mechanism 100 of the embodiment of the present inventionWith the second camshaft 42, linking arm 5, slide block group 7, push-rod assembly 8 and phase-regulating mechanism (scheming not shown).
Wherein, valve mechanism 1 has been prior art, and is known by those skilled in the art, and for example valve mechanism 1 canTo comprise valve 11, valve 11 can move back and forth up and down to open or close along the center line of valve 11 in valve guide bushingThe air inlet of combustion chamber or exhaust outlet, the part that can adopt with prior art identical setting for these, retouches here no longer in detailState.
As shown in Figures 2 and 3, the substructure of rocker arm assembly 2 has the profile 231 of driving, drives profile 231 to be suitable for driving gasDoor 11 moves along the direction that is parallel to valve 11 center lines, and driving profile 231 can be boot last face, but is not limited to this. ShouldWork as understanding, those skilled in the art can be according to actual needs and flexible design drives the concrete line style of profile 231, is not limited toAbove-mentioned boot last face. On rocker arm assembly 2, be provided with roller 31. Roller 31 is located on rocker arm assembly 2 pivotly, changes speechIt, roller 31 is located on rocker arm assembly 2 and can pivotable with respect to rocker arm assembly 2.
As depicted in figs. 1 and 2, the first camshaft 41 and the second camshaft 42 be arranged in parallel, the first camshaft 41 and secondThe common rocker arm assembly 2 that drives of camshaft 42. The first camshaft 41 has the first cam 411, the second camshafts 42 and hasTwo cam 421, the first cams 411 and the second cam 421 can be fitted in respectively on corresponding axle. According to more of the present inventionEmbodiment, each in the first cam 411 and the second cam 421 all has large basic circle (the A section in Fig. 2), little basic circle(the B section in Fig. 2) and be connected to the changeover portion (the C section in Fig. 2) between large basic circle and little basic circle, but be not limited to this,For a person skilled in the art, can be according to actual needs and the molded line of adaptive settings cam.
The first end (F end in Fig. 2) of linking arm 5 is connected pivotly with rocker arm assembly 2, the second end (figure of linking arm 5E end in 2) be located at pivotly in the body group of engine. Employing linking arm 5 structures can limit rocker arm assembly 2Movement locus, the while can keep the stability of rocker arm assembly 2 well, and simple in structure.
Here, need explanation a bit, in this area, body group mainly comprise cylinder block, cylinder head, cylinder head gasket withAnd the parts such as oil sump, but in the present invention, body group should be made broad understanding, can be understood as this body group not onlyComprise the included parts of above-mentioned traditional sense upper machine body group, can also comprise some attached installing components etc. For example,, upperIn the description of face, " the second end of linking arm 5 is located in the body group of engine pivotly ", can be understood as linking arm 5The second end directly pivotly (for example, by the second linking arm bearing pin 52) be located at body group as in cylinder head, or cylinderCover and can be fixedly installed intermediate member, the second end of linking arm 5 is located on this intermediate member pivotly, here inBetween parts to can be understood as be a part for body group.
Slide block group 7 is located on rocker arm assembly 2, in slide block group 7, is limited with chute. Push-rod assembly 8 comprises push rod 81 and elasticityPart 82, the two ends of push rod 81 are located on rocker arm assembly 2 pivotly around pivot axis, are provided with push rod projection on push rod 81811 and push rod slide block 812, push rod slide block 812 is engaged in chute rotationally around described pivot axis, and at push rod slide block812 push-rod assemblies 8 while being resisted against one end of chute are suitable for and rocker arm assembly 2 synchronization actions. In other words, push-rod assembly 8 nowAs a molar behavior, one end of elastic component 82 flexibly compresses push rod projection 811, and elastic component 82 with rocker arm assembly 2The other end coordinate with slide block group 7 so that the first cam 411 against roller 31 and the second cam 421 against push rod 81.
As shown in Figure 7, in the time that push rod slide block 812 is resisted against one end of chute, push-rod assembly 8 and rocker arm assembly 2 are as oneIndividual molar behavior, the first cam 411 is against roller 31 and the second cam 421 against push rod 81, thus at the first camshaft41 and second camshaft 42 while rotating, the large basic circle of the first cam 411, little basic circle and changeover portion can be respectively and roller 31Contact, similarly, the large basic circle of the second camshaft 42, little basic circle and changeover portion can contact with push rod 81 respectively, in phaseWhile answering the diverse location of cam to contact with corresponding roller 31 or push rod 81, rocker arm assembly 2 moves the lift of rear drive valve 11Amount can change.
For example,, at large basic circle and corresponding roller 31 or the push rod of two kinds of cams (i.e. the first cam 411 and the second cam 421)When 81 contact, the lift amount of valve 11 can be maximum. The little basic circle that has at least one cam in two kinds of cams withWhen corresponding roller 31 or push rod 81 contact, valve 11 can be in closed condition, i.e. the lift amount minimum of valve 11. AndThe changeover portion of two kinds of cams and corresponding roller 31 or push rod 81 contacts or one for changeover portion, another for large basic circle withWhen corresponding roller 31 or push rod 81 contact, valve 11 lift amount can be between zero lift and maximum lift. But,Should be appreciated that the present invention is not limited to this, for a person skilled in the art, read description disclosed herein inOn the basis holding, molded line that obviously can the above-mentioned two kinds of cams of flexible design, at two kinds of cam profiles and corresponding roller 31 orWhen the position that push rod 81 contacts changes, the lift amount of valve 11 also can adaptations, and this is for the skill of this areaArt personnel should be that appearance is intelligible.
Below with reference to Fig. 1-Fig. 8, the course of work of valve actuating mechanism 100 once is simply described: elastic component 82 drives push rod 81 to transportMoving makes push rod slide block 812 rotate in the chute of slide block group 7 around pivot axis.
When valve 11 is during in lift, that is to say when valve 11 is in an open position, for example the transition of the first cam 411Section contacts with roller 31 and the changeover portion of the second cam 421 contacts time or the changeover portion of the first cam 411 with push rod 81Contact with roller 31 and when the large basic circle of the second cam 421 contacts with push rod 81, push rod slide block 81 is against one end of chute,Namely push rod slide block 81 is in the position shown in Fig. 7, the at this moment angle minimum between push rod 81 and rocker arm assembly 2, fromAnd push-rod assembly 8 and rocker arm assembly 2 moves as a whole, thereby the first cam 411 and roller 31, second protruding are ensuredWheel 421 contacts and does not separate all the time with push rod 81, and can adjust valve clearance, thereby avoids valve actuating mechanism 100 to occurSlip phenomenon and affect the stability of valve actuating mechanism 100.
In the time that valve 11 is closed, for example, when the little basic circle of the first cam 411 contacts with roller 31 or will contact at once, and theWhen the little basic circle of two cams 421 contacts with push rod 81 or will contact at once, elastic component 82 drives push rod 81 from as shown in Figure 7Position move to position as shown in Figure 8, push rod slide block 81 is from the position of the one end against chute to the other end of chuteWhen mobile, the angle between push rod 81 and rocker arm assembly 2 increases gradually.
Along with the continuation rotation of the first camshaft 41 and the second camshaft 42, push rod slide block 81 is again gradually from the other end of chuteMove one end to chute.
Here be understandable that, in the time that push rod slide block 81 is resisted against the other end of chute, push rod 81 and rocker arm assembly 2 itBetween angle maximum, along with the rotation of the first camshaft 41 and the second camshaft 42, when push rod slide block 81 is not resisted against chuteThe other end time just start to move to described one end of chute.
Phase-regulating mechanism is for regulating the relative phase of the first camshaft 41 and the second camshaft 42, thereby change first is protrudingThe relative phase of wheel 411 and the second cam 421. According to one embodiment of present invention, phase-regulating mechanism can be phase placeDevice, phaser can be single rotor phaser, only has a rotor, rotor can with the first camshaft 41 and the second camOne of axle 42 is connected, and to regulate this camshaft phase place of another camshaft relatively, should be appreciated that phaser regulates two camsThe relative phase of axle has been prior art, here specific works principle and the tune of the concrete structure to phaser, phaserJoint process is not made specified otherwise.
Be appreciated that owing to driving homonymy valve 11 to adopt two camshafts (according to the valve actuating mechanism 100 of the embodiment of the present inventionThe first camshaft 41 and the second camshaft 42), therefore regulate by phaser according to the valve actuating mechanism 100 of the embodiment of the present inventionAfter the relative phase of these two camshafts, can realize the secondary opening of valve 11 and extend 11 opening times of valve.
Particularly, the first camshaft 41 and the second camshaft 42 can pass through bent axle and the intermediate transmission parts of engineDrive, this first camshaft 41 and the second camshaft 42 can be realized oppositely (example explanation can certainly be in the same way)Synchronous rotary (being prior art), for example, can realize by the identical meshed transmission gear of the number of teeth, but be not limited to this.In the process that the first camshaft 41 and the second camshaft 42 counter-rotate, there will be the large basic circle of two kinds of above-mentioned cams equalContact with corresponding roller 31 or push rod 81, now the lift amount of valve 11 can be maximum, also there will be a kind of cam simultaneouslyLarge basic circle with corresponding roller 31 or push rod 81 contacts and the changeover portion of another kind of cam connects with corresponding roller 31 or push rod 81Tactile situation, now the relative maximum lift of valve 11 lift amount reduces to some extent, and valve 11 has breakdown action twice like this,Wherein once be opened into maximum lift, the relative maximum lift of lift of another this unlatching reduces, and has realized valve and has opened for 11 2 timesThe object opening.
Further, when the interval of valve 11 secondary openings is larger, as valve 11 secondary openings of exhaust side approach air inlet sideWhen the valve-closing moment, can realize scavenging function. If the 11 secondary opening times of valve hour, as the valve of exhaust sideWhen 11 secondary openings approach the valve opening moment of air inlet side, can realize the EGR of larger inside. The concrete valve 11 2 of controllingIn the time interval of inferior unlatching, can realize by adaptability design cam profile, but be not limited to this.
Regulate at phaser after the relative phase of two camshafts, the relative phase of the first cam 411 and the second cam 421 is sent outRaw change, now can realize and increase valve 11 open-interval objects, for example, at the relative phase that has regulated two camshaftsAfter, two cams there will be lasting large basic circle and the situation that corresponding roller 31 or push rod 81 contact, and now can greatly extendValve 11 is opened the duration.
Thus, can realize valve 11 secondary openings and gas according to the valve actuating mechanism 100 for engine of the embodiment of the present inventionDoor 11 is opened the object that the duration increases, and in the time realizing valve 11 secondary opening, can realize scavenging function or improve innerEGR, has been eliminated the first cam 411 and has been rolled by cooperatively interacting of rocker arm assembly 2, slide block group 7 and push-rod assembly 8 simultaneouslyGap and valve clearance between gap, the second cam 421 and push rod 81 between son 31, avoided valve actuating mechanism 100In motion process, there is slip phenomenon, further promoted stability. In addition, according to the valve actuating mechanism 100 of the embodiment of the present inventionIts rocker arm assembly 2 is simpler, compact, and parts are few, and cost is low.
Describe the valve actuating mechanism 100 in diagram in detail below with reference to Fig. 1-Fig. 8.
As shown in Figure 3, rocker arm assembly 2 comprises two rocking arm portions 22 and middle arm portions 24,22 points, these two rocking arm portionsThe two ends of arm portions 24 in the middle of not being located at, two rocking arm portions 22 are oppositely arranged and along the first camshaft 41 and the second camshaft42 be axially spaced apart from each other, preferably, two rocking arm portions 22 can be integrally formed with middle arm portions 24, thus canReduce processing step, intensity is high, and cost is low.
Further, as shown in Figure 3, rocker arm assembly 2 also comprises drive division 23, and drive division 23 is located at each rocking arm portion 22Bottom, drive division 23 can be configured to plates and bottom surface is that cambered surface drives profile 231 to form. The cambered surface equally, hereCan be divided into the subarc face that multistage is connected in turn, this driving profile 231 can be configured to boot last, but is not limited to this.
Further, as shown in Figure 3, the two ends of middle arm portions 24 are respectively arranged with roller 31, and middle linking armTwo rollers 31 of portion 24 and this are connected by the first bearing pin 91.
As shown in Figure 4 and Figure 5, push rod 81 can comprise the base portion body of rod 801 and the end body of rod 802. The end body of rod 802 canTo be located at respectively the two ends of the base portion body of rod 801, the relative inner of two end bodies of rod 802 is respectively arranged with push rod projection 811And push rod slide block 812. Between each end body of rod 802 and corresponding rocking arm portion 22, be provided with a slide block group 7, slidingThe free end of piece group 7, the end body of rod 802 and rocking arm portion 22 are connected by the second bearing pin 92. Further simplify and join thusThe structure of mechanism of qi structure 100, makes more easily arranging and taking up room little of push-rod assembly 8, slide block group 7.
Further, slide block group 7 can comprise the first sub-slide block 71 and the second sub-slide block 72 that are oppositely arranged. The first sub-slide block71 two ends are spaced apart with the two ends at the first sub-slide block 71 and the second sub-slide block 72 with the two ends of the second sub-slide block 72 respectivelyTwo ends between limit respectively a chute. In other words, the first end of the first sub-slide block 71 (G1 end as shown in Figure 8)Be spaced apart from each other with the first end at the first sub-slide block 71 with the first end (H1 end as shown in Figure 8) of the second sub-slide block 72And between the first end of the second sub-slide block 72, limit a chute, the second end of the first sub-slide block 71 (as shown in Figure 8G2 end) be spaced apart from each other with at the first sub-slide block 71 with second end (H2 end as shown in Figure 8) of the second sub-slide block 72The second end and the second end of the second sub-slide block 72 between limit another chute.
Correspondingly, push rod slide block 812 can comprise two sub-push rod slide blocks 8121, and two sons of each push rod slide block 812 push awayBar slide block 8121 can be located at respectively in two chutes that respective slide group 7 limits accordingly. In other words, two sons push awayOne in bar slide block 8121 is located between the first end of the first sub-slide block 71 and the first end of the second sub-slide block 72 and limits oneIn individual chute, another in two sub-push rod slide blocks 8121 is located at the second end and the second sub-slide block 72 of the first sub-slide block 71The second end between limit in a chute. Thus, push rod 81 makes a sub-pusher slide under the driving of elastic component 82Piece 8121 is in the second bearing pin 92 is engaged in a chute rotationally, and another sub-pusher slide piece 8121 is around the second bearing pin92 are engaged in another chute rotationally.
Further, the shape of the first sub-slide block 71 and the second sub-slide block 72 is identical and about the second bearing pin 92 radial symmetric clothPut the distance between the first sub-slide block 71 and the second sub-slide block 72 and the equal diameters of the second bearing pin 92. Thus, slide block group7 structure is simpler, and processing cost is low and easy to manufacture, simultaneously the first sub-slide block 71 and the second sub-slide block 72 and the second pinThe cooperation gapless of axle 92, thus can be fixed on more firmly in the rocking arm portion 22 of rocker arm assembly 2.
In order to make slide block group 7 more firm and simple in structure with fixing of rocker arm assembly 2, in some optional embodiments, theThe two ends enlarged-diameter of two bearing pins 92 to be to form enlarged-diameter portion 921, and wherein any one enlarged-diameter portion 921 is by this sideSlide block group 7 is located between this enlarged-diameter portion 921 and this side rocking arm portion 22. In other optional embodiments, slide blockGroup 7 can be weldingly fixed in rocking arm portion 22. In this some other optional embodiment, slide block group 7 can pass through bolt,Pin or rivet are fixed in rocking arm portion 22.
Alternatively, elastic component 82 can be spring, and one end of spring can be bent into the circular arc with push rod projection 811 adaptationsHook portion 821, ring spring around the other end of at least one circle of the second bearing pin 82 and spring be bent into the shape of slide block group 7 adaptations withClip is at least a portion outer peripheral face of slide block group 7. Thereby one end of elastic component is fixed and is made elastic component 82 produce driving thusThe power that push rod 81 rotates around the second bearing pin 92.
In these some embodiment, as depicted in figs. 1 and 2, valve actuating mechanism 100 also comprises valve rocker 61, valve rockerOn 61, be provided with valve rocker roller 611, the top of valve 11 coordinates with one end of valve rocker 61, drives profile 231Be resisted against on valve rocker roller 611. Thus, in the time that rocker arm assembly 2 moves, the driving profile 231 of its bottom can promoteValve rocker roller 611 drives valve rocker 61 to move, and valve rocker 61 and then drive valve 11 move to open valve11。
Further, as depicted in figs. 1 and 2, can also comprise support 10 for the valve actuating mechanism 100 of engine. ?Hold portion 10 for supporting the first camshaft 41 and the second camshaft 42. It is tabular that support 10 can be configured to rectangle, andSupport 10 is provided with first clamp port corresponding with the first camshaft 41 and second clamping corresponding with the second camshaft 42Mouthful, simple in structure thus, easy to process, cost is low, takes up room little, convenient layout.
In brief, can realize the secondary opening of valve 11 according to the valve actuating mechanism 100 of the embodiment of the present invention, simultaneously all rightExtend valve 11 and open the lasting time, and in the course of the work can eliminate roller 31 and the first cam 411 and push rod 81And the gap between the second cam 421.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " specifically showExample " or the description of " some examples " etc. the specific features that means to describe in conjunction with this embodiment or example, structure, material orFeature is contained at least one embodiment of the present invention or example. In this manual, the schematic statement to above-mentioned termNot must for be identical embodiment or example. And specific features, structure, material or the feature of description canIn any one or more embodiment or example with suitable mode combination. In addition, those skilled in the art can be byDifferent embodiment or the example in this description, described engage and combine.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary,Can not be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodimentChange, amendment, replacement and modification.
Claims (10)
1. for a valve actuating mechanism for engine, it is characterized in that, comprising:
Valve mechanism;
Rocker arm assembly, the substructure of described rocker arm assembly has driving profile, and described driving profile is suitable for driving the valve of valve mechanism to move along the direction that is parallel to valve center line, on described rocker arm assembly, is provided with roller;
Linking arm, the first end of described linking arm is connected pivotly with described rocker arm assembly, and the second end of described linking arm is located in the body group of described engine pivotly;
Slide block group, described slide block group is located on described rocker arm assembly, in described slide block group, is limited with chute;
The first camshaft and the second camshaft, described the first camshaft has the first cam and described the second camshaft has the second cam;
Push-rod assembly, described push-rod assembly comprises push rod and elastic component, the two ends of described push rod are located on described rocker arm assembly pivotly around pivot axis, on described push rod, be provided with push rod projection and push rod slide block, described push rod slide block in described pivot axis is engaged in described chute rotationally and described in the time that described push rod slide block is resisted against one end of described chute push-rod assembly be suitable for and described rocker arm assembly synchronization action, one end of described elastic component flexibly compress that described push rod projection and the other end and described slide block assembly close so that described the first cam against described roller and described the second cam against described push rod, and
For regulating the phase-regulating mechanism of described the first camshaft and described the second camshaft relative phase.
2. the valve actuating mechanism for engine according to claim 1, is characterized in that, described rocker arm assembly comprises:
Two rocking arm portions and middle arm portions, described two rocking arm portions are located at respectively the two ends of described middle arm portions, and described two rocking arm portions are oppositely arranged and being axially spaced apart from each other along described the first and second camshafts.
3. the valve actuating mechanism for engine according to claim 2, it is characterized in that, described rocking arm portion also comprises: drive division, and described drive division is located at the bottom of each described rocking arm portion, and described drive division is configured to plates and bottom surface is that cambered surface is to form described driving profile.
4. the valve actuating mechanism for engine according to claim 3, is characterized in that, the two ends of described middle arm portions are respectively arranged with described roller and described middle arm portions is connected by the first bearing pin with these two rollers.
5. the valve actuating mechanism for engine according to claim 2, it is characterized in that, described push rod comprises: the base portion body of rod and the end body of rod, the described end body of rod is located at respectively the two ends of the described base portion body of rod, the relative inner of described two end bodies of rod is respectively arranged with described push rod projection and described push rod slide block, between each described end body of rod and corresponding rocking arm portion, be provided with a described slide block group, the free end of described slide block group, the described end body of rod and described rocking arm portion are connected by the second bearing pin.
6. the valve actuating mechanism for engine according to claim 5, it is characterized in that, described slide block group comprises: the first sub-slide block being oppositely arranged and the second sub-slide block, the two ends of described the first sub-slide block respectively and the two ends of described the second sub-slide block spaced apart to limit respectively a described chute between the two ends at described the first sub-slide block and the two ends of described the second sub-slide block;
Described push rod slide block comprises two sub-push rod slide blocks, and two sub-push rod slide blocks of each described push rod slide block are located at respectively in two chutes that respective slide group limits accordingly.
7. the valve actuating mechanism for engine according to claim 6, it is characterized in that, the shape of described the first and second sub-slide blocks is identical and arrange the distance between described the first sub-slide block and described the second sub-slide block and the equal diameters of described the second bearing pin about described the second bearing pin radial symmetric.
8. the valve actuating mechanism for engine according to claim 6, it is characterized in that, the two ends enlarged-diameter of described the second bearing pin is to form enlarged-diameter portion, and wherein described in any one, enlarged-diameter portion is located in the slide block group of this side between this enlarged-diameter portion and this side rocking arm portion; Or described slide block bond pads is fixed in described rocking arm portion; Or described slide block group is fixed in described rocking arm portion by bolt, pin or rivet.
9. the valve actuating mechanism for engine according to claim 6, it is characterized in that, described elastic component is spring, one end of described spring is bent into the circular arc hook portion with described push rod projection adaptation, and described ring spring is bent into the shape of described slide block group adaptation with clip at least a portion outer peripheral face in described slide block group around the other end of at least one circle of described the second bearing pin and described spring.
10. according to the valve actuating mechanism for engine described in any one in claim 1-9, it is characterized in that, described phase-regulating mechanism is phaser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749723.7A CN103742220B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310749723.7A CN103742220B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine |
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| Publication Number | Publication Date |
|---|---|
| CN103742220A CN103742220A (en) | 2014-04-23 |
| CN103742220B true CN103742220B (en) | 2016-05-11 |
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| CN201310749723.7A Active CN103742220B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364341A (en) * | 1980-06-13 | 1982-12-21 | Teodoro Holtmann | Valve control device for an internal combustion engine |
| CN101457665A (en) * | 2007-12-14 | 2009-06-17 | 现代自动车株式会社 | Continuous variable valve lift system |
| JP4469341B2 (en) * | 2005-09-15 | 2010-05-26 | 株式会社オティックス | Variable valve mechanism |
-
2013
- 2013-12-30 CN CN201310749723.7A patent/CN103742220B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364341A (en) * | 1980-06-13 | 1982-12-21 | Teodoro Holtmann | Valve control device for an internal combustion engine |
| JP4469341B2 (en) * | 2005-09-15 | 2010-05-26 | 株式会社オティックス | Variable valve mechanism |
| CN101457665A (en) * | 2007-12-14 | 2009-06-17 | 现代自动车株式会社 | Continuous variable valve lift system |
Non-Patent Citations (1)
| Title |
|---|
| 发动机配气机构的配气定时研究与应用;于兴芝等;《武汉理工大学学报》;20081031;第30卷(第10期);147-151 * |
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| CN103742220A (en) | 2014-04-23 |
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