CN103742219B - For the valve actuating mechanism of engine and there is its vehicle - Google Patents
For the valve actuating mechanism of engine and there is its vehicle Download PDFInfo
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- CN103742219B CN103742219B CN201310745604.4A CN201310745604A CN103742219B CN 103742219 B CN103742219 B CN 103742219B CN 201310745604 A CN201310745604 A CN 201310745604A CN 103742219 B CN103742219 B CN 103742219B
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- valve
- roller
- cam
- camshaft
- actuating mechanism
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
Abstract
The invention discloses a kind of valve actuating mechanism for engine and there is its vehicle. This valve actuating mechanism comprises: valve mechanism; Substructure has the rocker arm assembly of the driving profile that drives valve mechanism; First to three rollers, and first is all located on rocker arm assembly pivotly to three rollers, first and three rollers coaxially arranged; Have the first camshaft of the first cam and have the second camshaft of the second cam, the first cam is against the first roller and the second cam against the second roller; Briquetting, briquetting is static with respect to the body group of described engine, is configured to circular arc camber on briquetting, and three rollers is close on circular arc camber; And for regulating the phase-regulating mechanism of the first camshaft and the second camshaft relative phase. 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, realizes two asynchronous work of valve of the same side of same cylinder, changes eddy current in combustion chamber, rolls stream, improves burning.
Description
Technical field
The present invention relates to automobile construction field, especially relate to a kind of valve actuating mechanism for engine and there is its vehicle.
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, one object of the present invention is to propose a kind of valve actuating mechanism for engine, and this valve actuating mechanism can be realizedThe secondary opening of valve, can also extend the lasting time of valve opening simultaneously, and simple in structure, and parts are few.
Another object of the present invention is to propose a kind of vehicle with above-mentioned valve actuating mechanism.
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; The first roller, the second roller and three rollers, described the first roller, described the second roller and the described the 3rdRoller is all located on described rocker arm assembly pivotly, and described the first roller and described three rollers are coaxially arranged; The first camAxle and the second camshaft, described the first camshaft has the first cam and described the second camshaft has the second cam, and describedOne cam is against described the first roller and described the second cam against described the second roller; Briquetting, described briquetting is with respect to describedThe body group of engine is static, on described briquetting, is configured with circular arc camber, and described three rollers is close on described circular arc camber;And for regulating the phase-regulating mechanism of described the first camshaft and described the second camshaft 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, simultaneously according to thisIts rocker arm assembly of the valve actuating mechanism of bright embodiment 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: rocking arm portion and drive division, form in described rocking arm portionHave hollow bulb, described hollow bulb is towards a side of described the first camshaft and spacious respectively towards a side of described the second camshaftOpen, described the second roller is located in described hollow bulb pivotly, and described drive division is located at the bottom of described rocking arm portion, described inDrive 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, described rocking arm portion comprises: the first side plate and the second side plate, described the first sideBoard and described the second side plate are oppositely arranged and are spaced apart from each other; Upper connecting portion and lower connecting portion, described upper connecting portion connectsBetween described the first side plate and the top of described the second side plate, described lower connecting portion be connected to described the first side plate withBetween the bottom of described the second side plate.
According to some embodiments of the present invention, the top of described rocking arm portion is provided with the first roller, the both sides of described the first rollerBe respectively arranged with described three rollers, top, described the first roller and the described three rollers of described rocking arm portion is by the first pinAxle is connected, and described the second roller is located between described the first and second side plates pivotly by the second bearing pin.
According to some embodiments of the present invention, the described valve actuating mechanism for engine also comprises: valve rocker and hydraulic tappet,On described valve rocker, be provided with valve rocker roller, the top of described valve coordinates with one end of described valve rocker, described inHydraulic tappet coordinates with the other end of described valve rocker, and described driving profile is resisted against on described valve rocker roller.
According to some embodiments of the present invention, the side towards described three rollers of described briquetting forms described circular arc camber.
According to some embodiments of the present invention, in described briquetting, be formed with loss of weight cavity, described loss of weight cavity deviate from describedOne side of three rollers is opened wide, and in described loss of weight cavity, is provided with reinforcement structure.
According to some embodiments of the present invention, described valve mechanism comprises two valves, and each described valve all one of correspondence shakesArm component and corresponding roller and briquetting; Described the second camshaft comprises interior axle and the outer shaft of coaxial setting, described second protrudingDescribed in wheel comprises that interior axis cam and outer shaft cam, described interior axis cam are fixed on described interior axle and described outer shaft cam is fixed onOn outer shaft, respectively corresponding two rocker arm assemblies of described interior axis cam and described outer shaft cam, described phase-regulating mechanism also forRegulate the relative phase of described interior axle and described outer shaft.
According to the valve actuating mechanism of the embodiment of the present invention, owing to adopting the mechanism of concentric camshaft, can also realize the same of same cylinderTwo asynchronous work of valve of one side (for example, exhaust side), change eddy current in combustion chamber and roll stream, improve burning, orFor different operating modes and the valve stroke characteristics of motion of each cylinder of Adaptive Control, thereby meet better the various of engineOperating mode, improves discharge performance and the fuel economy of engine.
According to some embodiments of the present invention, described phase-regulating mechanism is birotor phaser.
According to the vehicle of the embodiment of the present invention, also comprise according to the valve actuating mechanism for engine in the above embodiment of the present invention.
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 shows according to the structure at the rocker arm assembly of the valve actuating mechanism for engine of the embodiment of the present invention and valve rocker placeIntention.
Fig. 4 is according to the structural representation of second camshaft for engine of the embodiment of the present invention.
Reference numeral:
Valve actuating mechanism 100,
Valve mechanism 1, valve 11,
Rocker arm assembly 2,
Rocking arm portion 22, the first side plate and 221, the second side plate 222, upper connecting portion 223, lower connecting portion 224,
Hollow bulb 220,
Drive division 23, drive profile 231,
The first roller 31, the first roller 32, three rollers 33,
The first camshaft 41, the first cam 411,
The second camshaft 42, the second cam 421,
Interior axle 422, interior axis cam 4221, outer shaft 423, outer shaft cam 4231,
Briquetting 5, loss of weight cavity 51,
Valve rocker 61, valve rocker roller 611, hydraulic tappet 62
The first bearing pin 71, the second bearing pin 72,
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. 4.
Comprise that according to the valve actuating mechanism 100 for engine of the embodiment of the present invention valve mechanism 1, rocker arm assembly 2, first rollSon 31, the second roller 32, three rollers 33, the first camshaft 41 and the second camshaft 42, briquetting 5 and phase adjustedMechanism's (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.
The first roller 31, the second roller 32 and three rollers 33 are all located on rocker arm assembly 2 pivotly, and the first roller31 and three rollers 33 coaxially arranged. That is to say, the first roller 31 is located on rocker arm assembly 2 and with respect to rocker arm assembly2 can pivotable, and the second roller 32 is located on rocker arm assembly 2 and can pivotable with respect to rocker arm assembly 2, and three rollers 33 is located atOn rocker arm assembly 2 and can pivotable with respect to rocker arm assembly 2. The first roller 31 and three rollers 33 can be around same pivot axisPivotable.
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.
As depicted in figs. 1 and 2, the first cam 411 is against the first roller 31 and the second cam 421 against the second roller 32,Thus in the time that the first camshaft 41 and the second camshaft 42 rotate, the large basic circle of the first cam 411, little basic circle and transitionSection can contact with the first roller 31 respectively, and similarly, the large basic circle of the second camshaft 42, little basic circle and changeover portion can divideDo not contact with the second roller 32, in the time that the diverse location of respective cams contacts with corresponding roller, rocker arm assembly 2 moves rear driveThe lift amount of valve 11 can change.
For example, (first roll at large basic circle and the corresponding roller of two kinds of cams (i.e. the first cam 411 and the second cam 421)Son 31 or second roller 32) when contact, the lift amount of valve 11 can be maximum. In two kinds of cams, exist at least oneWhen the little basic circle of kind cam contacts with corresponding roller, valve 11 can be in closed condition, i.e. the lift amount minimum of valve 11.And the changeover portion of two kinds of cams contact with corresponding roller or one for changeover portion, another connects for large basic circle and corresponding rollerWhile touching, valve 11 lift amount can be between zero lift and maximum lift. But, should be appreciated that the present invention does not limitIn this, for a person skilled in the art, having read on the basis of description content disclosed herein, obviously canThe molded line of the above-mentioned two kinds of cams of flexible design, when the position contacting with corresponding roller at two kinds of cam profiles changes, valve11 lift amount also can adaptations, this for a person skilled in the art, should be hold intelligible.
Briquetting 5 is static with respect to the body group of described engine, on briquetting 5, is configured with circular arc camber, and three rollers 33 is close toOn circular arc camber.
Here described in said briquetting 5, the body group of engine is static, refers to that briquetting 5 fixes, when rocker arm assembly 2 quiltsWhen drive actions, three rollers 33 can roll along circular arc camber. That is to say, adopt briquetting 5 and three rollers 33 to tieStructure can limit the movement locus of rocker arm assembly 2, can keep well the stability of rocker arm assembly 2 simultaneously, and simple in structure.
As shown in Figure 2, the side towards three rollers 33 of briquetting 5 can form described circular arc camber. Further, pressPiece 5 is interior can be formed with loss of weight cavity 51, and a side that deviates from three rollers 33 of loss of weight cavity 51 is opened wide, loss of weight cavity 51Inside be provided with and strengthen structure to increase the intensity of briquetting 5, in reducing briquetting 5 overall weight, also ensured briquetting 5 toolsThere is higher intensity. Strengthening structure can be structure or above-mentioned several structures such as stiffener, reinforcement convex tendon or reinforcement projectionAny combination.
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 an optional embodiment of invention, phase-regulating mechanism can bePhaser, phaser can be single rotor phaser, only has a rotor, rotor can with the first camshaft 41 and secondOne of camshaft 42 is connected, and to regulate this camshaft phase place of another camshaft relatively, should be appreciated that phaser regulates twoThe relative phase of camshaft has been prior art, here the specific works principle of the concrete structure to phaser, phaser withAnd adjustment 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 equalWith the contact of corresponding roller, now the lift amount of valve 11 can be maximum, also there will be a kind of large basic circle of cam and right simultaneouslyAnswer the changeover portion of roller contact and another kind of cam and the situation of corresponding roller contact, now valve 11 lift amount rise higher relatively mostJourney reduces to some extent, and valve 11 has breakdown action twice like this, is wherein once opened into maximum lift, the liter of another this unlatchingThe relative maximum lift of journey reduces, and has realized the object of valve 11 secondary openings.
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 situations that cams there will be lasting large basic circle to contact with corresponding roller, now can greatly extend valve 11 unlatchings and holdThe continuous time.
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, simultaneously simpler, compact according to valve actuating mechanism 100 its rocker arm assemblies 2 of the embodiment of the present invention, parts are few, becomeThis is low.
Describe the valve actuating mechanism 100 in diagram in detail below with reference to Fig. 1-Fig. 4:
In certain embodiments, rocker arm assembly 2 can comprise: rocking arm portion 22 and drive division 23. In rocking arm portion 22, be formed with hollowPortion 220, hollow bulb 220 is the side towards the second camshaft 42 towards a side of the first camshaft 41 and hollow bulb 220Open wide respectively. Not only can loss of weight by hollow bulb 220 is set, reduce the rotary inertia of rocker arm assembly 2, can also reduce machineTool loses, and can increase the reliability and stability of valve actuating mechanism 100.
The second roller 32 is located in hollow bulb 220 pivotly, and drive division 23 is located at the bottom of rocking arm portion 22, drive division 23Being configured to plates and bottom surface is that cambered surface drives profile 231 to form. The cambered surface here can be divided into the son that multistage is connected in turnCambered surface, this driving profile 231 can be configured to boot last, but is not limited to this. Preferably, rocking arm portion 22 and drive division 23Can be integrally formed, can reduce thus processing step, intensity is high, and cost is low.
Further, as shown in Figure 3, rocking arm portion 22 can comprise the first side plate 221, the second side plate 222, upper companyConnect portion 223 and lower connecting portion 224. The first side plate 221 and the second side plate 222 are oppositely arranged and are spaced apart from each other. ByThis limits the hollow bulb 220 that the second roller 22 can be set. Upper connecting portion 223 is connected to the first side plate 221 and the second sideBetween the top of board 222, lower connecting portion 224 is connected between the first side plate 221 and the bottom of the second side plate 222,Strengthen thus the structural strength of rocking arm portion 22, increased the stability of rocker arm assembly 2.
Particularly, the both sides that the top of rocking arm portion 22 is provided with the first roller 31, the first rollers 31 are respectively arranged with the 3rd and rollSon 33, top, first roller 31 of rocking arm portion 22 are connected by the first bearing pin 71 with three rollers 33, the second roller 32Be located at pivotly between the first side plate 221 and the second side plate 222 by the second bearing pin 72.
In certain embodiments, as depicted in figs. 1 and 2, valve actuating mechanism 100 also comprises valve rocker 61 and hydraulic tappet 62,On valve rocker 61, be provided with valve rocker roller 611, the top of valve 11 coordinates with one end of valve rocker 61, hydraulic pressureTappet 62 coordinates with the other end of valve rocker 61, drives profile 231 to be 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 promote valve rocker roller 611 and drive valve rocker 61 movingDo, valve rocker 61 and then drive valve 11 move to open valve 11.
Hydraulic tappet 62 can be used for regulating valve 11 gaps, and the concrete structure of hydraulic tappet 62 and operation principle have been existing skillArt, and be widely used in this area, be for example applied in VVL technology, therefore do not do in detail for hydraulic tappet 62 hereThin description.
At other, alternatively in embodiment, valve mechanism 1 can comprise two valves 11, all corresponding one, each valve 11Rocker arm assembly 2 and corresponding roller and briquetting 5. Particularly, the corresponding rocker arm assembly 2 of valve 11 and canBe located at pivotally the first roller 31, the second roller 32 and three rollers 33 on this rocker arm assembly 2. As shown in Figure 1, oneIndividual valve 11 can be corresponding with first roller 31, two three rollers 33 and second roller 32. Wherein,Two three rollers 33 are all close on the circular arc camber of briquetting 5.
As shown in Figure 1 and Figure 4, the second camshaft 42 comprises interior axle 422 and outer shaft 423, the second cams 421 of coaxial settingComprise interior axis cam 4221 and outer shaft cam 4231, interior axis cam 4221 is fixed on interior axle 422, and outer shaft cam 4231Be fixed on outer shaft 423 interior axis cam 4221 and respectively corresponding two rocker arm assemblies 2 of outer shaft cam 4231, phase adjustedMechanism is also for regulating the relative phase of interior axle 422 and outer shaft 423.
Interior axle 422 is embedded in outer shaft 423 and interior axle 422 can rotate relatively with outer shaft 423, also can synchronous rotary. ReferenceShown in Fig. 1 and Fig. 4, interior axle 422 is provided with interior axis cam 4221 and outer shaft 423 is provided with outer shaft cam 4231, interior axleCam 4221 rotates with interior axle 422, and outer shaft cam 4231 is rotated with outer shaft 423. Wherein, outer shaft 423 is near interior crown of rollIn the part of wheel 4221, can be provided with limit sliding chutes, on interior axis cam 4221, can be provided with pin, pin can be in this limitIn the chute of position, slide, limit sliding chutes can limit the rotational angle of interior axis cam 4221 relative outer shafts 423, by spacing cunningThe position-limiting action of groove, interior axle 422 can be adjustable continuously in certain angle with the relative phase of outer shaft 423.
Interior axis cam 4221 is with second roller 32 against coordinating, and outer shaft cam 4231 is supported with another second roller 32By coordinating, in other words, interior axis cam 4221 is identical with the quantity sum of outer shaft cam 4231 and the total amount of the second roller 32.
The first camshaft 41 has multiple the first cams 411, and each the first cam 411 and corresponding the first roller 31 are against joiningClose, in other words, the total amount of the first cam 411 and the total amount of the first roller 31 are identical and respectively correspondingly against joiningClose.
According to some embodiments of the present invention, each in interior axis cam 4221, outer shaft cam 4231 and the first cam 411All there is large basic circle (the A section in Fig. 3), little basic circle (the B section in Fig. 3) and be connected between large basic circle and little basic circleChangeover portion (the C section in Fig. 3), but be not limited to this, for a person skilled in the art, can be according to actual needsAnd the molded line of adaptive settings cam.
In the time that the second camshaft 42 rotates, the large basic circle of each in interior axis cam 4221 and outer shaft cam 4231, little baseCircle and changeover portion all can contact with the second corresponding roller 32 respectively. Equally, in the time that the first camshaft 41 rotates, firstThe large basic circle of cam 411, little basic circle and changeover portion all can contact with the first corresponding roller 31 respectively. Should be appreciated thatWhen the diverse location of respective cams contacts with corresponding roller, it can be to become that rocker arm assembly 2 moves the lift amount of rear drive valve 11Changing, for example, can be high-lift amount, zero lift amount and the middle lift amount between high-lift amount and zero lift amount.
For example, two kinds of cams on the second camshaft 42 (interior axis cam 4221 and outer shaft cam 4231) roll with corresponding secondWhen son 32 is large basic circle contact, when the first cam 411 is little basic circle contact with corresponding the first roller 31, corresponding valve 11 placesIn closed condition. Two kinds of cams (interior axis cam 4221 and outer shaft cam 4231) on the second camshaft 42 are with corresponding secondWhen roller 32 is large basic circle contact, when the first cam 411 is large basic circle contact with corresponding the first roller 31, corresponding valve 11In maximum opening. Two kinds of cams (interior axis cam 4221 and outer shaft cam 4231) on the second camshaft 42 are with rightWhile answering the second roller 32 for little basic circle contact, when the first cam 411 is large basic circle contact with corresponding the first roller 31, correspondenceValve 11 is in closed condition.
But 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 three kinds of cams of flexible design, contacts with corresponding roller at three kinds of cam profilesPosition while changing, the lift amount of valve 11 also can adaptations, this for a person skilled in the art,Should be that appearance is intelligible.
Phase-regulating mechanism for regulate the relative phase of outer shaft 423 and the first camshaft 41 and also for regulate outer shaft 423 andThe relative phase of interior axle 422. In other words, phase-regulating mechanism can only regulate in axle 422 with respect to outer shaft 423 relativelyPhase place, now outer shaft 423 relative (the first camshaft 41) can keep transfixion. Or phase-regulating mechanism can only be adjustedThe relative phase of relative the first camshaft 41 of joint outer shaft 423, now interior axle 422 relative (outer shaft 423) can keep staticMoving. Or phase-regulating mechanism also can regulate interior axle 422 and outer shaft 423, i.e. integrated above-mentioned two kinds of regulative modes simultaneously. RootAccording to the above embodiment of the present invention, phase-regulating mechanism can be birotor phaser, has two of internal rotor and outer rotorsRotor, wherein internal rotor can be connected with interior axle 422, and outer rotor can be connected with outer shaft 423, to regulate interior axle 422 and outer shaftThe relative phase of 423 relative phase or adjusting outer shaft 423 and the first camshaft 41. Should be appreciated that birotor phaser tuneJoint outer shaft 423 with the principle of the relative phase of interior axle 422 and the relative phase of outer shaft 423 and the first camshaft 41 isPrior art, here specific works principle and the adjustment process of the concrete structure to birotor phaser, birotor phaserDo not make specified otherwise.
Be appreciated that because the valve actuating mechanism 100 of other optional embodiments according to the present invention drives homonymy valve 11 and adoptTwo camshafts (i.e. the first camshaft 41 and the second camshaft 42) and wherein the second camshaft 42 are concentric camshaft, because ofThis regulates the outer shaft 423 and first of concentric camshaft by birotor phaser according to the valve actuating mechanism 100 of the embodiment of the present inventionAfter the outer shaft 423 of camshaft 41 and concentric camshaft and the relative phase of interior axle 422, can realize the secondary of valve 11Open and extend 11 opening times of valve, valve 11 lifts are variable and realize the same side (for example, row of same cylinderGas side) two asynchronous work of valve 11, change eddy current in combustion chamber, roll stream, improve several functions such as burning grade, adjustingMode is various, can meet better engine requirement to distribution under different operating modes.
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 reverse sync rotation (being prior art), for example canTo realize by the identical meshed transmission gear of the number of teeth, but be not limited to this. At the first camshaft 41 and the second camshaft 42In the process of reverse rotation, there will be the large basic circle of three kinds of above-mentioned cams, little basic circle and changeover portion and corresponding roller differenceContact situation, valve 11 lift amount with three kinds of cams with the variation of the contact cooperation position of corresponding roller adaptations.
For example change internal rotor and outer rotor phase place, interior axis cam 4221 can freely be controlled it with the first corresponding cam 411The valve 11 lift characteristics of motion of corresponding valve 11, outer shaft cam 4231 also can be certainly with the first corresponding cam 411 simultaneouslyBy the valve 11 lift characteristics of motion of controlling its corresponding valve 11, realize the accommodation to each valve 11 characteristics of motion,Thereby improve engine power performance and fuel economy.
Meanwhile, can also realize object and the prolongation of valve 11 secondary openings by the regulating action of birotor phaserValve 11 is opened the lasting time. Further, when the interval of valve 11 secondary openings is larger, as the valve 11 2 of exhaust sideWhen inferior unlatching approaches the valve-closing moment of air inlet side, can realize scavenging function. If the 11 secondary opening times of valve are hour,While approaching the valve opening moment of air inlet side as valve 11 secondary openings of exhaust side, can realize the EGR of larger inside. ToolIn the time interval of body control valve 11 secondary openings, can realize by adaptability design cam profile, but be not limited to this.
Thus, the valve actuating mechanism 100 for engine according to the above embodiment of the present invention can be realized valve 11 secondary openingsAnd valve 11 open the duration increase object, in the time realizing valve 11 secondary opening, can realize scavenging function or raisingInternal EGR, simultaneously simpler, compact according to valve actuating mechanism 100 its rocker arm assemblies 22 of the embodiment of the present invention, partsFew, cost is low. And, according to the valve actuating mechanism 100 of the embodiment of the present invention, owing to adopting the mechanism of concentric camshaft, alsoCan realize two asynchronous work of valve of the same side (for example, exhaust side) of same cylinder, change eddy current in combustion chamber,Roll stream, improve the object of burning, or for different operating modes and the valve stroke characteristics of motion of each cylinder of Adaptive Control,Thereby meet better the various operating modes of engine, improve discharge performance and the fuel economy of engine.
Simply describe according to the vehicle of the embodiment of the present invention below.
Comprise according to the valve actuating mechanism for engine of describing in the above embodiment of the present invention according to the vehicle of the embodiment of the present invention100. Thus, good according to the vehicle power of the embodiment of the present invention, noxious gas emission is few, energy-conserving and environment-protective.
Should be understood that, according to other configuration example of the vehicle of the embodiment of the present invention as engine, speed changer, differential mechanism,Brakes etc. have been all prior art and have been well known for ordinary skill in the art, therefore no longer retouched in detail one by one hereState.
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 (9)
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 valve mechanismValve moves along the direction that is parallel to valve center line;
The first roller, the second roller and three rollers, described the first roller, described the second roller and described three rollers all canBe located at pivotally on described rocker arm assembly, described the first roller and described three rollers are coaxially arranged;
The first camshaft and the second camshaft, described the first camshaft has the first cam and described the second camshaft has secondCam, described the first cam is against described the first roller and described the second cam against described the second roller;
Briquetting, described briquetting is static with respect to the body group of described engine, on described briquetting, is configured with circular arc camber, described inThree rollers is close on described circular arc camber, is formed with loss of weight cavity in described briquetting, described in the deviating from of described loss of weight cavityOne side of three rollers is opened wide, and in described loss of weight cavity, is provided with reinforcement structure; 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:
Rocking arm portion and drive division, be formed with hollow bulb in described rocking arm portion, and described hollow bulb is towards one of described the first camshaftSide and unlimited respectively towards a side of described the second camshaft, described the second roller is located in described hollow bulb pivotly,Described drive division is located at the bottom of described rocking arm portion, and described drive division is configured to plates and bottom surface is that cambered surface is driven described in formingEjector half face.
3. the valve actuating mechanism for engine according to claim 2, is characterized in that, described rocking arm portion comprises:
The first side plate and the second side plate, described the first side plate and described the second side plate are oppositely arranged and are spaced apart from each other;
Upper connecting portion and lower connecting portion, described upper connecting portion is connected to the top of described the first side plate and described the second side plateBetween, described lower connecting portion is connected between described the first side plate and the bottom of described the second side plate.
4. the valve actuating mechanism for engine according to claim 3, is characterized in that, establish at the top of described rocking arm portionBe equipped with the first roller, the both sides of described the first roller are respectively arranged with described three rollers, the top of described rocking arm portion, described inThe first roller is connected by the first bearing pin with described three rollers, and described the second roller is located at pivotly by the second bearing pinBetween described the first and second side plates.
5. the valve actuating mechanism for engine according to claim 1, is characterized in that, also comprises: valve rocker andHydraulic tappet, is provided with valve rocker roller on described valve rocker, the top of described valve and one end of described valve rockerCoordinate, described hydraulic tappet coordinates with the other end of described valve rocker, and described driving profile is resisted against described valve rocker and rollsOn son.
6. the valve actuating mechanism for engine according to claim 1, is characterized in that, described briquetting towards describedThe side of three rollers forms described circular arc camber.
7. according to the valve actuating mechanism for engine described in any one in claim 1-6, it is characterized in that described valveMechanism comprises two valves, and each described valve is a corresponding rocker arm assembly and corresponding roller and briquetting all;
Described the second camshaft comprises interior axle and the outer shaft of coaxial setting, and described the second cam comprises interior axis cam and outer shaft cam,Described interior axis cam is fixed on described interior axle and described outer shaft cam is fixed on described outer shaft, described interior axis cam and described inOuter shaft cam is corresponding two rocker arm assemblies respectively, and described phase-regulating mechanism is also for regulating the phase of described interior axle and described outer shaftTo phase place.
8. the valve actuating mechanism for engine according to claim 7, is characterized in that, described phase-regulating mechanism isBirotor phaser.
9. a vehicle, is characterized in that, comprises according to the distribution for engine described in any one in claim 1-8Mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745604.4A CN103742219B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine and there is its vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745604.4A CN103742219B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine and there is its vehicle |
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| Publication Number | Publication Date |
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| CN103742219A CN103742219A (en) | 2014-04-23 |
| CN103742219B true CN103742219B (en) | 2016-05-11 |
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| CN201310745604.4A Active CN103742219B (en) | 2013-12-30 | 2013-12-30 | For the valve actuating mechanism of engine and there is its vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3324010A1 (en) * | 2016-11-18 | 2018-05-23 | Pierburg GmbH | Mechanically controllable valve drive |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382137A (en) * | 2015-07-31 | 2017-02-08 | 长城汽车股份有限公司 | Valve actuating mechanism for engine and cam of valve actuating mechanism |
| DE102015118884A1 (en) * | 2015-11-04 | 2017-05-04 | Pierburg Gmbh | Mechanically controllable valve train |
| CN108637085A (en) * | 2018-05-29 | 2018-10-12 | 邵保贵 | A kind of punching pressure ring integration apparatus |
| CN117552852B (en) * | 2024-01-12 | 2024-04-16 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10228022B4 (en) * | 2002-06-20 | 2009-04-23 | Entec Consulting Gmbh | Valve lifting device for stroke adjustment of the gas exchange valves of an internal combustion engine |
| JP3966147B2 (en) * | 2002-10-10 | 2007-08-29 | 三菱自動車工業株式会社 | Continuously variable valve operating device for internal combustion engine |
| EP1496211A1 (en) * | 2003-07-08 | 2005-01-12 | Bayerische Motoren Werke Aktiengesellschaft | Rocker arm for a variable lift valve drive |
| DE102008025781A1 (en) * | 2008-05-29 | 2009-12-10 | Thyssenkrupp Presta Teccenter Ag | Adjustable camshaft arrangement |
| JP2011127433A (en) * | 2009-12-15 | 2011-06-30 | Suzuki Motor Corp | Variable valve train of internal combustion engine |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3324010A1 (en) * | 2016-11-18 | 2018-05-23 | Pierburg GmbH | Mechanically controllable valve drive |
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| CN103742219A (en) | 2014-04-23 |
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