CN103742219A - Valve timing mechanism for engine and vehicle with the same - Google Patents
Valve timing mechanism for engine and vehicle with the same Download PDFInfo
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- CN103742219A CN103742219A CN201310745604.4A CN201310745604A CN103742219A CN 103742219 A CN103742219 A CN 103742219A CN 201310745604 A CN201310745604 A CN 201310745604A CN 103742219 A CN103742219 A CN 103742219A
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- valve
- roller
- cam
- camshaft
- distribution device
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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 valve timing mechanism for an engine and a vehicle with the same. The valve timing mechanism comprises a valve mechanism, a rocker component, a first, a second and a third roller, a first cam shaft, a second cam shaft, a press block and a phase regulating mechanism, wherein a drive molded surface which is used for driving the valve mechanism is formed at the bottom of the rocker component; the first, second and third rollers are pivotally mounted on the rocker component, and the first and third rollers are arrayed coaxially; the first cam shaft comprises a first cam, the second cam shaft comprises a second cam, and the first cam is propped against the first roller while the second cam is propped against the second roller; the press block is static relatively to the engine body and is formed with a circular arc camber, and the third roller is clung to the circular arm camber; the phase regulating mechanism is used for regulating the relative phases of the first cam shaft and the second cam shaft. The valve timing mechanism is capable of realizing the secondary open of the valve, prolonging the valve opening duration, realizing the asynchronous work of two valves at the same side of the same cylinder, is capable of changing the vortex and tumble in the combustion chamber, and is capable of improving the combustion.
Description
Technical field
The present invention relates to automobile construction field, especially relate to a kind of distribution device for motor and there is its vehicle.
Background technique
The distribution device of motor is for driving the switching of valve, and its port timing is the local optimum based on a certain narrow and small condition range of motor and determining generally, immobilize in the course of the work, and valve motion rule is determined by cam profile completely.But because cam profile is single, can not adjust valve motion rule according to motor actual conditions conditions of demand, can not the different operating conditions of simultaneous adaptation motor, oil consumption is higher, discharges poor, be unfavorable for improving the power performance of motor simultaneously, and general lift range variable technology can only change valve opening maximum lift, shifts gears more single, and complex structure, component 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 distribution device for motor, and this distribution device can be realized the secondary opening of valve, can also extend the lasting time of valve opening simultaneously, and simple in structure, and component are few.
Another object of the present invention is to propose a kind of vehicle with above-mentioned distribution device.
The distribution device for motor according to the embodiment of the present invention, 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; The first roller, the second roller and three rollers, described the first roller, described the second roller and described three rollers are all located on described rocker arm assembly pivotly, and 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 the second cam, and 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 motor, 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.
According to the distribution device for motor of the embodiment of the present invention, can realize the object of secondary opening of air valve and the increase of valve opening duration, when realizing secondary opening of air valve, can realize scavenging function or improve internal EGR, simultaneously simpler, compact according to its rocker arm assembly of the distribution device of the embodiment of the present invention, component are few, and cost is low.
In addition, according to the distribution device for motor 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 portion, in described rocking arm portion, be formed with hollow portion, described hollow portion opens wide respectively towards a side of described the first camshaft and towards a side of described the second camshaft, described the second roller is located in described hollow portion pivotly, described drive portion is located at the bottom of described rocking arm portion, and described drive portion is configured to laminar body 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, and described the first side plate and described the second side plate are oppositely arranged and are spaced apart from each other; Upper joint and lower joint, described upper joint is connected between described the first side plate and the top of described the second side plate, and described lower joint is connected between described the first side plate and 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 roller are respectively arranged with described three rollers, top, described first roller of described rocking arm portion are connected by the first bearing pin with described three rollers, 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 distribution device for motor 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 hydraulic 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, a side that deviates from described three rollers of described loss of weight cavity 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, the equal corresponding rocker arm assembly of valve and corresponding roller and briquetting described in each; Described the second camshaft comprises interior axle and the outer shaft of coaxial setting, 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, respectively corresponding two rocker arm assemblies of described interior axis cam and described outer shaft cam, described phase-regulating mechanism is also for regulating the relative phase of described interior axle and described outer shaft.
According to the distribution device of the embodiment of the present invention, owing to adopting the mechanism of concentric camshaft, (for example can also realize the same side of same cylinder, exhaust side) two asynchronous work of valve, change eddy current in firing chamber and roll stream, improve and burn, or for different operating modes and the valve lift characteristics of motion of each cylinder of Adaptive Control, thereby meet better the various operating modes of motor, improve emission performance and the fuel economy of motor.
According to some embodiments of the present invention, described phase-regulating mechanism is double rotor phase discriminator.
According to the vehicle of the embodiment of the present invention, also comprise according to the distribution device for motor in the above embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of the distribution device for motor of the embodiment of the present invention.
Fig. 2 is according to the side view of the distribution device for motor of the embodiment of the present invention.
Fig. 3 is according to the structural representation at the rocker arm assembly of the distribution device for motor of the embodiment of the present invention and valve rocker place.
Fig. 4 is according to the structural representation of second camshaft for motor of the embodiment of the present invention.
Reference character:
Valve mechanism 1, valve 11,
Rocker arm assembly 2,
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,
Valve rocker 61, valve rocker roller 611, hydraulic tappet 62
The first bearing pin 71, the second bearing pin 72,
Embodiment
Describe embodiments of the invention below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
The body group of motor is the support of motor, is the matrix of connecting rod, distribution device and the assembling of each system.In related domain, usually, body group is mainly comprised of cylinder block, cylinder head, cylinder head gasket and oil sump etc., oil sump is generally located at the bottom of cylinder block, cylinder head is located at the top of cylinder block, cylinder head gasket is located between the end face of cylinder block and the bottom surface of cylinder head, for sealing the gap between the two.
Cylinder head forms firing chamber together with cylinder with piston head, the top of firing chamber has suction port and relief opening, and the valve of valve mechanism is located in cylinder cap and sealing suction port and relief opening.For existing general motor, adopt the two valve forms of entering scene 2 more, minority also has the valve form that adopts one-in-and-one-out or three to enter scene 2.
For same motor, generally all there is multiple different operating mode, such as low speed small load condition, high speed high load working condition etc., when motor is under different operating modes, motor externally moment of torsion and the power of output is different, the content of the harmful gas of motor discharge is simultaneously also different, and the distribution device of motor, according to the requirement of the work cycle of carrying out in each cylinder and firing order, regularly opens and closes intake valve and exhaust valve.
Usually, distribution device can regulate the lift amount of valve, but regulative mode is single, can not meet well usage requirement.According to the distribution device of the embodiment of the present invention, can realize the secondary opening of valve, opening time that simultaneously also can proper extension valve, regulative mode is various, thereby meets better the requirement of different operating modes.
Being appreciated that can be for driving into the valve event of gas side according to the distribution device of the embodiment of the present invention, can certainly be for driving the valve event of exhaust side, or be used in air inlet side and exhaust side to drive corresponding valve event simultaneously.Preferably, according to the distribution device of the embodiment of the present invention, for driving the valve event of exhaust side, in the following description, take this distribution device is example for driving the valve of exhaust side.
Below with reference to Fig. 1-Fig. 4, describe in detail according to the distribution device 100 for motor of the embodiment of the present invention.
According to the distribution device 100 for motor of the embodiment of the present invention, comprise valve mechanism 1, rocker arm assembly 2, the first roller 31, the second roller 32, three rollers 33, the first camshaft 41 and the second camshaft 42, briquetting 5 and phase-regulating mechanism (scheming not shown).
Wherein, valve mechanism 1 has been prior art, and known by those skilled in the art, for example valve mechanism 1 can comprise valve 11, valve 11 can move back and forth up and down to open or close along the center line of valve 11 suction port or the relief opening of firing chamber in valve guide bushing, for these, can adopt the part of identical setting with prior art, be not described in detail here.
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 valve 11 to move 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.Should be appreciated that those skilled in the art can be according to actual needs and flexible design drives the concrete line style of profile 231, be not limited to above-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 roller 31 and three rollers 33 coaxially arranged.That is to say, the first roller 31 is located on rocker arm assembly 2 and can pivotable with respect to rocker arm assembly 2, 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 on 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 axis.
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 the common rocker arm assembly 2 that drives of the second camshaft 42.The first camshaft 41 has that the first cam 411, the second camshafts 42 have the second cam 421, the first cams 411 and the second cam 421 can be fitted in respectively on corresponding axle.According to some embodiments of the present invention, 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 is 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 when the first camshaft 41 and the second camshaft 42 rotation, the large basic circle of the first cam 411, little basic circle and changeover portion can contact with the first roller 31 respectively, similarly, the large basic circle of the second camshaft 42, little basic circle and changeover portion can contact with the second roller 32 respectively, when the diverse location of respective cams contacts with corresponding roller, the lift amount of rocker arm assembly 2 action rear driving valves 11 can change.
For example, when the large basic circle of two kinds of cams (i.e. the first cam 411 and the second cam 421) contacts with corresponding roller (i.e. the first roller 31 or the second roller 32), the lift amount of valve 11 can be maximum.While existing the little basic circle of at least one cam to contact with corresponding roller in two kinds of cams, valve 11 can be in closed condition, and the lift amount of valve 11 is minimum.And the changeover portion of two kinds of cams contact with corresponding roller or one for changeover portion, another is when contact with corresponding roller for large basic circle, valve 11 lift amount can be between zero lift and maximum lift.But, be to be understood that, the present invention is not limited to this, for a person skilled in the art, reading on the basis of specification content disclosed herein molded line that obviously can the above-mentioned two kinds of cams of flexible design, when the position contacting with corresponding roller at two kinds of cam profiles changes, the lift amount of valve 11 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 motor, on briquetting 5, is configured with circular arc camber, and three rollers 33 is close on circular arc camber.
Here described in said briquetting 5, the body group of motor is static, refers to that briquetting 5 fixes, and when the driven action of rocker arm assembly 2, three rollers 33 can roll along circular arc camber.That is to say, adopt briquetting 5 and three rollers 33 structures can limit the movement locus of rocker arm assembly 2, the while can keep the stability of rocker arm assembly 2 well, 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, briquetting 5 is interior can be formed with loss of weight cavity 51, a side that deviates from three rollers 33 of loss of weight cavity 51 is opened wide, and is provided with and strengthens structure to increase the intensity of briquetting 5 in loss of weight cavity 51, when reducing briquetting 5 overall weight, has also guaranteed that briquetting 5 has higher intensity.Strengthening structure can be stiffening plate, reinforcement convex tendon or the combination in any of strengthening the structures such as projection or above-mentioned several structures.
Phase-regulating mechanism is for regulating the relative phase of the first camshaft 41 and the second camshaft 42, thus the relative phase of change the first cam 411 and the second cam 421.According to an optional embodiment of invention, phase-regulating mechanism can be phase discriminator, phase discriminator can be single rotor phase discriminator, only has a rotor, rotor can be connected with one of second camshaft 42 with the first camshaft 41, to regulate this camshaft phase place of another camshaft relatively, is to be understood that, it has been prior art that phase discriminator regulates the relative phase of two camshafts, the specific works principle of the concrete structure of phase discriminator, phase discriminator and adjustment process is not made to specified otherwise here.
Be appreciated that, owing to driving homonymy valve 11 to adopt two camshafts (i.e. the first camshaft 41 and the second camshaft 42) according to the distribution device 100 of the embodiment of the present invention, therefore according to the distribution device 100 of the embodiment of the present invention, by phase discriminator, regulate after 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 drive by bent axle and the intermediate transmission parts of motor, 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 of the first camshaft 41 and the second camshaft 42 counterrotatings, there will be the large basic circle of two kinds of above-mentioned cams all to contact with corresponding roller, now the lift amount of valve 11 can be maximum, the situation that simultaneously also there will be a kind of large basic circle of cam and the changeover portion of corresponding roller contact and another kind of cam to contact with corresponding roller, now the relative maximum lift of valve 11 lift amount reduces to some extent, 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, realized the object of valve 11 secondary openings.
Further, when the interval of valve 11 secondary openings is larger, the valve-closing that approaches air inlet side as valve 11 secondary openings of exhaust side constantly time, can realize scavenging function.If the 11 secondary opening times of valve hour, the valve opening that approaches air inlet side as valve 11 secondary openings of exhaust side constantly time, can be realized the EGR of larger inside.In the concrete time lag of controlling valve 11 secondary openings, can realize by adaptability design cam profile, but be not limited to this.
At phase discriminator, regulate after the relative phase of two camshafts, the relative phase of the first cam 411 and the second cam 421 changes, now can realize and increase valve 11 open-interval objects, for example, after having regulated the relative phase of two camshafts, two situations that cams there will be lasting large basic circle to contact with corresponding roller, now can greatly extend valve 11 and open the endurance.
Thus, according to the distribution device 100 for motor of the embodiment of the present invention, can realize the object of valve 11 secondary openings and valve 11 unlatching durations increases, when realizing valve 11 secondary opening, can realize scavenging function or improve internal EGR, simultaneously simpler, compact according to distribution device 100 its rocker arm assemblies 2 of the embodiment of the present invention, component are few, and cost is low.
Below with reference to Fig. 1-Fig. 4, describe the distribution device 100 in diagram in detail:
In certain embodiments, rocker arm assembly 2 can comprise: rocking arm portion 22 and drive portion 23.In rocking arm portion 22, be formed with hollow portion 220, hollow portion 220 opens wide respectively towards a side of the second camshaft 42 towards a side and the hollow portion 220 of the first camshaft 41.Not only can loss of weight by hollow portion 220 is set, reduce the rotary inertia of rocker arm assembly 2, can also reduce mechanical loss, can increase the reliability and stability of distribution device 100.
The second roller 32 is located in hollow portion 220 pivotly, and drive portion 23 is located at the bottom of rocking arm portion 22, and drive portion 23 is configured to laminar body and bottom surface is that cambered surface drives profile 231 to form.The cambered surface here can be divided into multistage connected subarc face in turn, and this driving profile 231 can be configured to boot last, but is not limited to this.Preferably, rocking arm portion 22 can be integrally formed with drive portion 23, can reduce process step thus, and 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 joint 223 and lower joint 224.The first side plate 221 and the second side plate 222 are oppositely arranged and are spaced apart from each other.Limit thus the hollow portion 220 that the second roller 22 can be set.Upper joint 223 is connected between the first side plate 221 and the top of the second side plate 222, lower joint 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 top of rocking arm portion 22 is provided with the first roller 31; both sides of the first roller 31 are respectively arranged with three rollers 33; top of rocking arm portion 22, the first roller 31 are connected by the first bearing pin 71 with three rollers 33, and the second roller 32 is located between the first side plate 221 and the second side plate 222 pivotly by the second bearing pin 72.
In certain embodiments, as depicted in figs. 1 and 2, distribution device 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 tappet 62 coordinates with the other end of valve rocker 61, drives profile 231 to be resisted against on valve rocker roller 611.Thus, when rocker arm assembly 2 action, the driving profile 231 bottom it can promote valve rocker rollers 611 and drive valve rocker 61 actions, and valve rocker 61 and then drive valve 11 move to open valve 11.
At other, alternatively in embodiment, valve mechanism 1 can comprise two valves 11, and each valve 11 is corresponding rocker arm assembly 2 and corresponding roller and briquetting 5 all.Particularly, corresponding rocker arm assemblies 2 of valve 11 and be located at pivotly the first roller 31, the second roller 32 and the three rollers 33 on this rocker arm assembly 2.As shown in Figure 1, 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 the outer shaft 423 of coaxial setting, the second cam 421 comprises interior axis cam 4221 and outer shaft cam 4231, interior axis cam 4221 is fixed on interior axle 422, and outer shaft cam 4231 is fixed on outer shaft 423, interior axis cam 4221 and respectively corresponding two rocker arm assemblies 2 of outer shaft cam 4231, phase-regulating mechanism is also for regulating the relative phase of interior axle 422 and outer shaft 423.
The first camshaft 41 has a plurality of the first cams 411, and each first cam 411 is with corresponding the first roller 31 against coordinating, and in other words, the total amount of the first cam 411 is identical with the total amount of the first roller 31 and distinguishes correspondingly against cooperation.
According to some embodiments of the present invention, each in interior axis cam 4221, outer shaft cam 4231 and the first cam 411 all has large basic circle (the A section in Fig. 3), little basic circle (the B section in Fig. 3) and is connected to the changeover portion (the C section in Fig. 3) 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.
When the second camshaft 42 rotation, interior axis cam 4221 can contact with the second corresponding roller 32 respectively with each large basic circle, little basic circle and the changeover portion in outer shaft cam 4231.Equally, when the first camshaft 41 rotation, the large basic circle of the first cam 411, little basic circle and changeover portion all can contact with the first corresponding roller 31 respectively.Be to be understood that, for example, when the diverse location of respective cams contacts with corresponding roller; the lift amount of rocker arm assembly 2 action rear driving valves 11 can change, and can be high-lift amount, zero lift amount and the middle lift amount between high-lift amount and zero lift amount.
For example, when two kinds of cams on the second camshaft 42 (interior axis cam 4221 and outer shaft cam 4231) contact for large basic circle with corresponding the second roller 32, when the first cam 411 is little basic circle contact with corresponding the first roller 31, corresponding valve 11 is in closed condition.When two kinds of cams on the second camshaft 42 (interior axis cam 4221 and outer shaft cam 4231) contact for large basic circle with corresponding the second roller 32, when the first cam 411 is large basic circle contact with corresponding the first roller 31, corresponding valve 11 is in maximum opening state.When two kinds of cams on the second camshaft 42 (interior axis cam 4221 and outer shaft cam 4231) contact for little basic circle with corresponding the second roller 32, when the first cam 411 is large basic circle contact with corresponding the first roller 31, corresponding valve 11 is in closed condition.
But, the present invention is not limited to this, for a person skilled in the art, reading on the basis of specification content disclosed herein, obviously molded line that can the above-mentioned three kinds of cams of flexible design, when the position contacting with corresponding roller at three kinds of cam profiles changes, the lift amount of valve 11 also can adaptations, this should be that appearance is intelligible for a person skilled in the art.
Phase-regulating mechanism is for regulating the relative phase of outer shaft 423 and the first camshaft 41 and also for regulating the relative phase of outer shaft 423 and interior axle 422.In other words, in phase-regulating mechanism can only regulate, axle 422 is with respect to the relative phase of outer shaft 423, and now outer shaft 423 relative (the first camshaft 41) can keep transfixion.Or phase-regulating mechanism can only regulate the relative phase of relative the first camshaft 41 of outer shaft 423, now interior axle 422 relative (outer shaft 423) can keep transfixion.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.According to the abovementioned embodiments of the present invention, phase-regulating mechanism can be double rotor phase discriminator, there are two rotors of internal rotor and external rotor, wherein internal rotor can be connected with interior axle 422, external rotor can be connected with outer shaft 423, to regulate the relative phase of interior axle 422 and outer shaft 423 or the relative phase of adjusting outer shaft 423 and the first camshaft 41.Be to be understood that, it has been prior art that double rotor phase discriminator regulates outer shaft 423 and the principle of the relative phase of interior axle 422 and the relative phase of outer shaft 423 and the first camshaft 41, the specific works principle of the concrete structure of double rotor phase discriminator, double rotor phase discriminator and adjustment process is not made to specified otherwise here.
Be appreciated that, due to the distribution device 100 of other optional embodiments according to the present invention drive homonymy valves 11 adopt two camshafts (i.e. the first camshaft 41 and the second camshaft 42) and wherein the second camshaft 42 be concentric camshaft, therefore according to the distribution device 100 of the embodiment of the present invention, by double rotor phase discriminator, regulate after the relative phase of the outer shaft 423 of concentric camshaft and the outer shaft of the first camshaft 41 and concentric camshaft 423 and interior axle 422, can realize the secondary opening of valve 11 and extend 11 opening times of valve, variable and the same side of realizing same cylinder of valve 11 lifts (for example, exhaust side) two asynchronous work of valve 11, change eddy current in firing chamber, roll stream, improve the several functions such as burning, regulative mode is various, can meet better motor requirement to distribution under different operating modes.
Particularly, the first camshaft 41 and the second camshaft 42 can drive by bent axle and the intermediate transmission parts of motor, this first camshaft 41 and the second camshaft 42 can be realized reverse sync rotation (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 of the first camshaft 41 and the second camshaft 42 counterrotatings, the situation that there will be the large basic circle of three kinds of above-mentioned cams, little basic circle and changeover portion to contact respectively with corresponding roller, 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 external rotor phase place, interior axis cam 4221 and the first corresponding cam 411 can freely be controlled the valve 11 lift characteristics of motion of its corresponding valve 11, simultaneously outer shaft cam 4231 and the first corresponding cam 411 also can freely be controlled the valve 11 lift characteristics of motion of its corresponding valve 11, the accommodation of realization to each valve 11 characteristics of motion, thus engine power performance and fuel economy improved.
Meanwhile, the regulating action by double rotor phase discriminator can also realize the object of valve 11 secondary openings and extend the 11 lasting times of unlatching of valve.Further, when the interval of valve 11 secondary openings is larger, the valve-closing that approaches air inlet side as valve 11 secondary openings of exhaust side constantly time, can realize scavenging function.If the 11 secondary opening times of valve hour, the valve opening that approaches air inlet side as valve 11 secondary openings of exhaust side constantly time, can be realized the EGR of larger inside.In the concrete time lag of controlling valve 11 secondary openings, can realize by adaptability design cam profile, but be not limited to this.
Thus, distribution device 100 for motor according to the above embodiment of the present invention can realize valve 11 secondary openings and valve 11 is opened the object that the duration increases, when realizing valve 11 secondary opening, can realize scavenging function or improve internal EGR, simultaneously simpler, compact according to distribution device 100 its rocker arm assemblies 22 of the embodiment of the present invention, component are few, and cost is low.And, according to the distribution device 100 of the embodiment of the present invention, owing to adopting the mechanism of concentric camshaft, can also realize two asynchronous work of valve of the same side (for example, exhaust side) of same cylinder, change eddy current in firing chamber, roll stream, improve the object of burning, or for different operating modes and the valve lift characteristics of motion of each cylinder of Adaptive Control, thereby meet better the various operating modes of motor, improve emission performance and the fuel economy of motor.
Below simply describe according to the vehicle of the embodiment of the present invention.
According to the vehicle of the embodiment of the present invention, comprise according to the distribution device 100 for motor of describing in the above embodiment of the present invention.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 motor, speed changer, differential mechanism, braking system etc. be all prior art and being well known for ordinary skill in the art, therefore describe in detail no longer one by one here.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiments or example.In addition, those skilled in the art can engage the different embodiments that describe in this specification or example 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, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (10)
1. for a distribution device for motor, 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;
The first roller, the second roller and three rollers, described the first roller, described the second roller and described three rollers are all located on described rocker arm assembly pivotly, and 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 the second cam, and 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 motor, 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.
2. the distribution device for motor according to claim 1, is characterized in that, described rocker arm assembly comprises:
Rocking arm portion and drive portion, in described rocking arm portion, be formed with hollow portion, described hollow portion opens wide respectively towards a side of described the first camshaft and towards a side of described the second camshaft, described the second roller is located in described hollow portion pivotly, described drive portion is located at the bottom of described rocking arm portion, and described drive portion is configured to laminar body and bottom surface is that cambered surface is to form described driving profile.
3. the distribution device for motor 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 joint and lower joint, described upper joint is connected between described the first side plate and the top of described the second side plate, and described lower joint is connected between described the first side plate and the bottom of described the second side plate.
4. the distribution device for motor according to claim 3, it is characterized in that, the top of described rocking arm portion is provided with the first roller, the both sides of described the first roller are respectively arranged with described three rollers, top, described first roller of described rocking arm portion are connected by the first bearing pin with described three rollers, and described the second roller is located between described the first and second side plates pivotly by the second bearing pin.
5. the distribution device for motor according to claim 1, it is characterized in that, also comprise: 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 hydraulic tappet coordinates with the other end of described valve rocker, and described driving profile is resisted against on described valve rocker roller.
6. the distribution device for motor according to claim 1, is characterized in that, the side towards described three rollers of described briquetting forms described circular arc camber.
7. the distribution device for motor according to claim 1, is characterized in that, is formed with loss of weight cavity in described briquetting, and a side that deviates from described three rollers of described loss of weight cavity is opened wide, and in described loss of weight cavity, is provided with reinforcement structure.
8. according to the distribution device for motor described in any one in claim 1-7, it is characterized in that, described valve mechanism comprises two valves, the equal corresponding rocker arm assembly of valve and corresponding roller and briquetting described in each;
Described the second camshaft comprises interior axle and the outer shaft of coaxial setting, 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, respectively corresponding two rocker arm assemblies of described interior axis cam and described outer shaft cam, described phase-regulating mechanism is also for regulating the relative phase of described interior axle and described outer shaft.
9. the distribution device for motor according to claim 8, is characterized in that, described phase-regulating mechanism is double rotor phase discriminator.
10. a vehicle, is characterized in that, comprises according to the distribution device for motor described in any one in claim 1-9.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
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| CN103742219A true CN103742219A (en) | 2014-04-23 |
| CN103742219B CN103742219B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| 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 |
| EP3165724A1 (en) * | 2015-11-04 | 2017-05-10 | Pierburg GmbH | Mechanisch steuerbarer ventiltrieb |
| CN108637085A (en) * | 2018-05-29 | 2018-10-12 | 邵保贵 | A kind of punching pressure ring integration apparatus |
| CN117552852A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016122179A1 (en) * | 2016-11-18 | 2018-05-24 | Pierburg Gmbh | Mechanically controllable valve train |
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| EP1496211A1 (en) * | 2003-07-08 | 2005-01-12 | Bayerische Motoren Werke Aktiengesellschaft | Rocker arm for a variable lift valve drive |
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| 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 |
| EP3165724A1 (en) * | 2015-11-04 | 2017-05-10 | Pierburg GmbH | Mechanisch steuerbarer ventiltrieb |
| CN108637085A (en) * | 2018-05-29 | 2018-10-12 | 邵保贵 | A kind of punching pressure ring integration apparatus |
| CN117552852A (en) * | 2024-01-12 | 2024-02-13 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
| CN117552852B (en) * | 2024-01-12 | 2024-04-16 | 潍柴动力股份有限公司 | Engine and valve mechanism thereof |
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|---|---|
| CN103742219B (en) | 2016-05-11 |
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