CN100395434C - Variable valve lift device of internal combustion engine - Google Patents
Variable valve lift device of internal combustion engine Download PDFInfo
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- CN100395434C CN100395434C CNB2004800391160A CN200480039116A CN100395434C CN 100395434 C CN100395434 C CN 100395434C CN B2004800391160 A CNB2004800391160 A CN B2004800391160A CN 200480039116 A CN200480039116 A CN 200480039116A CN 100395434 C CN100395434 C CN 100395434C
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- retainer
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Abstract
A variable valve lift device of an internal combustion engine, wherein a first link rocker arm (58) rotatably pivoted at the fixed position of an engine body is rotatably connected to a rocker arm (31). A movable pivot shaft (60) rotatably pivoting the other end part of a second link arm (59) having one end part rotatably connected to the rocker arm (31) comprises crank webs (61a) holding the second link arm (59) from both sides and connection parts (61c) integrally connecting both crank webs (61a) to each other at positions where the interference thereof with the second link arm (59) can be avoided, and is connected to a crank member (61) formed in a crank shape so that the crank member (61) can be drivingly rotated by a drive means. Thus, the lift amount of an engine valve can be steplessly varied, the torsional rigidity of the crank member can be secured while securing the assembling workability of the second link arm to the crank member, and the size of the device can be reduced.
Description
Technical field
The present invention relates to a kind of variable valve lift device of internal-combustion engine, it infinitely changes the lift amount as the engine valve of intake valve or exhaust valve.
Background technique
For the lift amount that makes engine valve infinitely changes, such valve device is disclosed in patent documentation 1: at a distolateral valve abutting part that has with the engine valve butt of rocking arm, the chimeric end that push rod (push rod) arranged in the other end of rocking arm is provided with linkage mechanism between the other end of push rod and valve driving cam.
But, in above-mentioned patent documentation 1 disclosed valve device, need between valve driving cam and rocking arm, guarantee to be used to dispose the bigger space of linkage mechanism and push rod, thereby valve device is maximized.And owing to be passed to rocking arm by linkage mechanism and push rod from the driving force of valve driving cam, thus rocking arm with respect to the followability of valve driving cam, be that the on-off action followability of engine valve is undesirable.
Therefore, the applicant has proposed the valve device of such internal-combustion engine in patent documentation 2: an end that is connected with first and second link arms on rocking arm rotationally, the other end rotatably support of first connecting rod arm is in body of the internal-combustion engine, and the other end of second connecting rod arm is moved by driver element, can realize the compactness of valve device according to this valve device, and will directly be passed to rocking arm from the power of valve driving cam, and can guarantee good followability with respect to the valve driving cam.
Patent documentation 1: Japanese patent gazette spy opens flat 8-74534 number
Patent documentation 2: Japanese patent gazette spy opens 2004-36560 number
But in the valve device of above-mentioned patent documentation 2, crank part has a pair of crankweb (crank web) of clamping the second connecting rod arm from both sides, and the movable fulcrum of the other end by supporting second connecting rod arm connects two crankwebs.But consider the assembling performance of second connecting rod arm with respect to crank part, at least one side's crankweb need be formed the parts that separate with movable fulcrum, after the end with movable fulcrum is installed on the opposing party's crankweb, make as and this movable fulcrum crankweb that is the parts of Different Individual be engaged in the other end of movable fulcrum.
Yet, in variable valve lift device,, having warping force and act on movable fulcrum owing to put on the driving torque of crankweb, the joining portion of therefore movable fulcrum and crankweb need have enough torsional rigids.In order to improve this torsional rigid, consideration is integrally formed by forging etc. with movable fulcrum and crankweb, but if the second connecting rod arm will be assembled on the crank part that movable fulcrum and crankweb are one, then must make the attachment hole that is arranged at the second connecting rod arm in order to insert movable fulcrum is two segmenting structures as the big end of connecting rod (connecting rod), can't avoid the maximization of second connecting rod arm thus.Promptly extremely difficult when the maximization that prevents variable valve lift device and guaranteeing the assembling performance of second connecting rod arm on crank part, guarantee the torsional rigid at the joining portion of movable fulcrum and crankweb.
Summary of the invention
The present invention is directed to the problems referred to above and propose, purpose is to provide a kind of variable valve lift device of internal-combustion engine, and it is guaranteed the torsional rigid of crank part, and can realize miniaturization when guaranteeing the assembling performance of second connecting rod arm on crank part.
To achieve these goals, proposed a kind of variable valve lift device of internal-combustion engine, in accordance with a first feature of the invention, it comprises: rocking arm, and it has the cam abutting part with valve driving cam butt, and is connected in linkage with engine valve; The first connecting rod arm, the one end is connected with this rocking arm rotationally, and a fixed pivot axis rotatably support is passed through in the fixed position of body of the internal-combustion engine in its other end; Second connecting rod arm, one end are connected with described rocking arm rotationally; Movable fulcrum, the other end of its rotatably support second connecting rod arm; Crank part, it is can making this movable fulcrum around being connected with described movable fulcrum with mode that the axis of its parallel axes carries out angular displacement, and rotatably support is in described body of the internal-combustion engine; And driver element, it is connected with described crank part, so that make described movable fulcrum generation angular displacement, described variable valve lift device is characterised in that, described crank part constitutes crank-like, and have the joint that from the crankweb of sandwich second connecting rod arm with in the position of avoiding interfering with the second connecting rod arm described two crankwebs is engaged to one, described movable fulcrum is connected with crank part to connect two modes between the crankweb.
Second feature according to the present invention, on described first feature base, the variable valve lift device of internal-combustion engine is characterised in that, the backing pin parallel with the rotation axis of described crank part is outstanding to be arranged at described crankweb, so that by coming the slewing area of described crank part is limited with engaging of described body of the internal-combustion engine side.
The 3rd feature according to the present invention, on described first or second feature base, the variable valve lift device of internal-combustion engine is characterised in that, described crank part at the two-side supporting of described rocking arm in described body of the internal-combustion engine.
The 4th feature according to the present invention, on described first feature base, the variable valve lift device of internal-combustion engine is characterised in that the single described crank part that a plurality of cylinders that form a line are shared is supported on body of the internal-combustion engine.
The 5th feature according to the present invention, on described first feature base, the variable valve lift device of internal-combustion engine is characterised in that, described crank part has the vertical collar that links to each other of outer surface with described crankweb, the top retainer and from below be engaged between the bottom retainer of top retainer, rotatably support has described collar, described top retainer constitutes the part of cam retainer and engages the rotatably mounted camshaft that is provided with described valve driving cam of this cam retainer with the cylinder head of body of the internal-combustion engine.
The 6th feature according to the present invention, on described the 5th feature base, the variable valve lift device of internal-combustion engine is characterised in that, with described cylinder head be that the described bottom retainer of Different Individual is anchored on described top retainer.
The 7th feature according to the present invention, on the described the 5th or the 6th feature base, the variable valve lift device of internal-combustion engine is characterised in that, at described upper and lower retainer, and be incorporated with between the described collar can be in two roller bearing.
The 8th feature according to the present invention, on described the 5th feature base, the variable valve lift device of internal-combustion engine is characterised in that, on the upper and lower retainer that is bonded with each other, form, run through this crank part and use the described collar rotatably support of supporting convex portion between the retainer of upper and lower towards the side-prominent crank part of described crankweb supporting convex portion.
The 9th feature according to the present invention, on described the 8th feature base, the variable valve lift device of internal-combustion engine is characterised in that, described top retainer and from above be engaged on the end cap of top retainer, be formed with towards the side-prominent camshaft of described rocking arm supporting convex portion, the camshaft with described valve driving cam runs through described camshaft with supporting convex portion and be rotatably supported between described top retainer and the end cap.
The tenth feature according to the present invention, on described the 9th feature base, the variable valve lift device of internal-combustion engine is characterised in that, connects described crank part and goes out to be arranged at described top retainer with supporting convex portion and described camshaft with the costal process between the supporting convex portion.
The 11 feature according to the present invention, on described first feature base, the variable valve lift device of internal-combustion engine is characterised in that, described crank part is at described engine valve and be arranged at and be configured to make the outer surface of described joint and described spark plug tube opposed between the spark plug tube of cylinder head, is formed with to be used to avoid the clearance groove of interfering with spark plug tube on the outer surface of described joint.
In accordance with a first feature of the invention, carry out angular displacement by the drive controlling axle, movable fulcrum infinitely is subjected to displacement, thereby the lift amount of engine valve is infinitely changed, one end of other first and second link arms directly is connected with rocking arm rotationally, can reduce the space of configuration two rocking arms, thereby can realize the compactness of valve device, owing to directly be passed to the cam abutting part of air inlet side rocking arm from the power of valve driving cam, so can guarantee with respect to good followability from the valve driving cam.And owing to connect as one by joint from the crankweb of sandwich second connecting rod arm, therefore even the required torque of the rotation of crank part is bigger, also can make the torsional strength burden of movable fulcrum less, and to make movable fulcrum and crank part be different individualities owing to constitute, under the state that the movable fulcrum portion of running through that makes a pair of crankweb and second connecting rod arm aims at, insert movable fulcrum by being pressed into to wait, therefore be easy to assemble.In addition, because the joint of crank part can not interfered with the second connecting rod arm, therefore can avoid the maximization of crank part and second connecting rod arm.
In addition according to second feature of the present invention, can be configured for limiting the structure of the slewing area of crank part compactly.
According to the 3rd feature of the present invention and since crank part at the two-side supporting of rocking arm in body of the internal-combustion engine, therefore can improve the supporting rigidity of crank part by dual-supporting, can critically carry out the variable control of lift amount of engine valve.
According to the 4th feature of the present invention, because the shared single crank part of a plurality of cylinders has been avoided the increase of number of spare parts, thereby can have been realized the compactness of internal-combustion engine.
According to the 5th feature of the present invention, can improve the assembling performance of crank part on body of the internal-combustion engine.
According to the 6th feature of the present invention, the design freedom of the cylinder head in the time of can improving the supporting crank part.
According to the 7th feature of the present invention, can reduce the frictional loss on the support of crank part, and can improve the assembling performance of crank part.
According to the 8th feature of the present invention, can further improve the supporting rigidity of crank part.
According to the 9th feature of the present invention, the number of spare parts that is used to support camshaft can be suppressed at inferior limit, and can improve the supporting rigidity of camshaft.
According to the tenth feature of the present invention, can further improve the supporting rigidity of crank part and camshaft.
And then, spark plug tube can be configured to make it more near the valve device side according to the 11 feature of the present invention, can realize the compactness of internal-combustion engine.
Description of drawings
Fig. 1 is the local longitudinal sectional drawing of internal-combustion engine, is the sectional drawing along the 1-1 line among Fig. 2.
(embodiment 1)
Fig. 2 is the sectional drawing along the 2-2 line among Fig. 1.(embodiment 1)
Fig. 3 is the sectional drawing along the 3-3 line among Fig. 2.(embodiment 1)
Fig. 4 is the major component enlarged view among Fig. 1.(embodiment 1)
Fig. 5 is the worm's eye view of the observed air inlet side of the arrow 5 directions rocking arm from Fig. 4.(embodiment 1)
Fig. 6 is the sectional drawing along the 6-6 line among Fig. 4.(embodiment 1)
Fig. 7 is the stereogram of lift changeable mechanism.(embodiment 1)
Fig. 8 is the sectional drawing along the 8-8 line among Fig. 4.(embodiment 1)
Fig. 9 is the observed view of direction of the 9-9 line from Fig. 2.(embodiment 1)
Figure 10 is the observed stereogram of arrow 10 directions from Fig. 9.(embodiment 1)
Label declaration
11: body of the internal-combustion engine; 14: cylinder head; 20: as the intake valve of engine valve; 29: the valve driving cam; 30: camshaft; 31: rocking arm; 32: variable valve lift device 38: the top retainer; 39: end cap 50: as the roller 57 of cam abutting part: as the air inlet side pitman arm shaft of a fixed pivot axis; 58: the first connecting rod arm; 59: the second connecting rod arm; 60: movable fulcrum; 61: crank part; 61a: crankweb; 61b: collar; 61c: joint; 62: as the actuator motor of driver element; 77: the bottom retainer; 79: roller bearing; 80: crank part supporting convex portion; 81: camshaft supporting convex portion; 82: rib; 87: spark plug tube; 88: clearance groove; 105: backing pin.
Embodiment
One embodiment of the present of invention shown in reference to the accompanying drawings describe embodiments of the present invention below.
Embodiment 1
Fig. 1～Figure 10 represents one embodiment of the present of invention.
At first in Fig. 1, comprise as the body of the internal-combustion engine 11 of the internal-combustion engine E of multi cylinder in upright arrangement: inside is provided with the cylinder block 13 of cylinder thorax 12 (cylinder bore); Be engaged in the cylinder head 14 of the end face of cylinder block 13; And the valve mechanism cover 15 that is engaged in the end face of cylinder head 14, chimeric slidably in each cylinder thorax 12 have a piston 16, and the firing chamber 17 relative with the top of each piston 16 is formed between cylinder block 13 and the cylinder head 14.
Be provided with the suction port 18 and the relief opening 19 that can communicate with each firing chamber 17 on cylinder head 14, each suction port 18 opens and closes respectively by a pair of intake valve 20 as engine valve, and each relief opening 19 opens and closes respectively by a pair of exhaust valve 21.Between the spring seat 22 of the upper end portion that is arranged at push rod (stem) 20a that intake valve 20 had and cylinder head 14, be provided with the valve spring 23 of each intake valve 20 to the closing direction application of force.In addition, between the spring seat 24 of the upper end portion that is arranged at the push rod 21a that exhaust valve 21 had and cylinder head 14, be provided with the valve spring 25 of each exhaust valve 21 to the closing direction application of force.
Drive the air inlet side valve device 28 that each intake valve 20 opens and closes, constitute according to the present invention, it comprises corresponding to each cylinder: the intake-side camshaft 30 that has air inlet side valve driving cam 29 corresponding to each cylinder; Air inlet side rocking arm 31, it is driven in air inlet side valve driving cam 29 and swings, and is connected in linkage jointly with a pair of intake valve 20 corresponding to each cylinder; And variable valve lift device 32.The exhaust side valve device 33 that drives each exhaust valve 21 switching comprises corresponding to each cylinder: the exhaust side camshaft 35 that has exhaust side valve driving cam 34 corresponding to each cylinder; And exhaust side rocking arm 36, it is driven in exhaust side valve driving cam 34 and swings, and is connected in linkage jointly with a pair of exhaust valve 21 corresponding to each cylinder.
Simultaneously with reference to Fig. 2 and Fig. 3, on cylinder head 14, be fastened with top retainer 38 in the mode that is disposed at each cylinder both sides, on each top retainer 38 from above be fastened with end cap 39,40, they constitute air inlet side cam retainer 41 and exhaust side cams retainer 42 jointly.And, rotatably mounted between the top retainer 38 that constitutes air inlet side cam retainer 41 and end cap 39 have an intake-side camshaft 30, and rotatably mounted between the top retainer 38 of common formation exhaust side cams retainer 42 and end cap 40 have an exhaust side camshaft 35.
One end of exhaust side rocking arm 36, support swingably by exhaust side pitman arm shaft 43, this exhaust side pitman arm shaft 43 has the axis parallel with exhaust side camshaft 35, and by 38 supportings of top retainer, on the other end of exhaust side rocking arm 36, screw togather to can regulate advance and retreat position a pair of tappet screw 44,44 with the upper end butt of the push rod 21a of a pair of exhaust valve 21.In addition, on the intermediate portion of exhaust side rocking arm 36, be provided with the axle 45 parallel with exhaust side rocking arm 36, with exhaust side valve driving cam 34 roll the roller 47 that contact and be incorporated with roller bearing 46 between described 45, and by 36 supportings of exhaust side rocking arm.
Such exhaust side valve device 33 is equipped on cylinder head 14 by this way: the swinging mounting portion that makes described exhaust side rocking arm 36 is that the portion of being connected that exhaust side pitman arm shaft 43 is disposed at exhaust side rocking arm 36 and exhaust valve 21 is the outside of tappet screw 44.
In Fig. 4 and Fig. 5, be provided with valve joint 31a in an end of air inlet side rocking arm 31, screw togather tappet screw 49,49 with the upper end butt of the push rod 20a of a pair of intake valve 20 in this valve joint 31a can regulate advance and retreat position.In addition, the other end at air inlet side rocking arm 31, conjointly be provided with the first support 31b mutually, and the second support 31c that is disposed at first support 31b below, the first and second support 31b, 31c form to the unlimited roughly U word shape of the opposition side of intake valve 20.
On the first support 31b of air inlet side rocking arm 31, by first coupling shaft 51 and roller bearing 52, axle is supported with roller 50, it is as the abutting part that rolls and contact with the air inlet side valve driving cam 29 of intake-side camshaft 30, and this roller 50 is configured to be clamped by the first support 31b of U word shape roughly.
Simultaneously with reference to Fig. 6, air inlet side rocking arm 31 is by light-alloy casting etc. and mould-forming, in the upper face center portion of its valve joint 31a, be formed with for example weight saving portion 53 of general triangular, both sides at the lower surface of the face of the opposition side of the described upper surface of conduct of valve joint 31a are formed with, with interconnected a pair of weight saving portion 54,54 of described weight saving portion 53.
In addition, described weight saving portion 53,54,54 form when air inlet side rocking arm 31 mould-formings simultaneously, the pattern draft of weight saving portion 53 of top be along with the big direction of opening area change towards the upper surface weight saving portion 53 of valve joint 31a, and it is relative therewith, the weight saving portion 54 of below, 54 pattern draft is along with the lower surface weight saving portion 54 towards valve joint 31a, 54 opening area becomes big direction, therefore, the true dip direction of the inner side surface of weight saving portion 53 and weight saving portion 54, the true dip direction of 54 inner side surface is identical, in weight saving portion 53 adjacent one another are, 54; 53, between 54, be formed at the 31d of wall portion of valve joint 31a, the thickness approximate equality of 31d.
Simultaneously with reference to Fig. 7 and Fig. 8, variable valve lift device 32 comprises: first connecting rod arm 58, the one end is connected with the first support 31b of described air inlet side rocking arm 31 rotationally, and its other end by as air inlet side pitman arm shaft 57 rotatably supports of a fixed pivot axis in the fixed position of body of the internal-combustion engine 11; Second connecting rod arm 59, one end are connected with the second support 31c of described air inlet side rocking arm 31 rotationally; Movable fulcrum 60, the other end of its rotatably support second connecting rod arm 59; Crank part 61, it is can make this movable fulcrum 60 around being connected with movable fulcrum 60 with mode that the axis of its parallel axes carries out angular displacement; And the actuator motor 62 that is connected with crank part 61 in order to make movable fulcrum 60 carry out angular displacement as driver element.
One end of first connecting rod arm 58 forms from the roughly U word shape of the first support 31b of sandwich air inlet side rocking arm 31, and is connected rotationally with the first support 31b by first coupling shaft 51 that 50 on roller is supported on air inlet side rocking arm 31.In addition, the air inlet side pitman arm shaft 57 of the other end of rotatably support first connecting rod arm 58 is by top retainer 38 supportings that are anchored on cylinder head 14.
An end that is disposed at the second connecting rod arm 59 of first connecting rod arm 58 belows is configured to, and is clamped by the second support 31c of air inlet side rocking arm 31, and is connected with the second support 31c rotationally by second coupling shaft 63.
Both sides in the other end of first connecting rod arm 58, on top retainer 38,38, be provided with supporting convex 64,64 so that the mode of supporting air inlet side pitman arm shaft 57 is outstanding integratedly, the other end of limiting first connecting rod arm 58 by these supporting convex 64 is moving on the axial direction of described air inlet side pitman arm shaft 57.
In addition, two intake valves 20 apply elastic force by valve spring 23 to closing direction, driving by when closing direction applies two intake valves 20 of elastic force to opening direction by air inlet side rocking arm 31, the roller 50 of air inlet side rocking arm 31 contacts with air inlet side valve driving cam 29 by the effect of valve spring 23, but, under intake valve 20 closing state, the elastic force of valve spring 23 does not act on air inlet side rocking arm 31, roller 50 leaves air inlet side valve driving cam 29, thereby the possibility that reduces of the control accuracy of the valve lift amount when existing intake valve 20 to open slightly.Therefore, by the rocking arm force application spring 65 different with valve spring 23, to air inlet side rocking arm 31 to the direction application of force that makes described roller 50 with air inlet side valve driving cam 29 butts.
Described rocking arm force application spring 65 is the spiral helicine torsion springs around described supporting convex 64, and it is arranged between body of the internal-combustion engine 11 and the air inlet side rocking arm 31.That is, an end of rocking arm force application spring 65 engages with described supporting convex 64, and the other end of rocking arm force application spring 65 inserts and is fastened in first coupling shaft 51 of the hollow of moving integratedly with air inlet side rocking arm 31.
The other end of first connecting rod arm 58 forms cylindric, its periphery is configured in the inboard of the periphery that is wound into spiral helicine described rocking arm force application spring 65 when side-looking, prevents that rocking arm force application spring 65 from swinging to a plurality of for example a pair of protuberance 66,67 of first connecting rod arm 58 sides giving prominence to be provided with respectively on the axial two ends of the other end of first connecting rod arm 58 with making progress devices spaced apart week.Therefore, can avoid the maximization of the other end of first connecting rod arm 58, can prevent that simultaneously the described of rocking arm force application spring 65 from toppling over, can improve the supporting rigidity of the other end of first connecting rod arm 58.
And described protuberance 66,67 is configured to avoid the actuating range of second connecting rod arm 59, although protuberance 66,67 is arranged at the other end of first connecting rod arm 58, but still can fully guarantee the actuating range of second connecting rod arm 59.
Be arranged on the end cap 39 of intake cam retainer 41 of body of the internal-combustion engine 11, the oil ejector 68 towards the other end upper lateral part fuel feeding of air inlet side rocking arm 31 is installed.
In addition, on one in a plurality of tops retainer 38, be provided with the passage 69 that is used to guide from the oil of not shown oil pump.In addition, with the Lower Half of intake-side camshaft 30 opposed to each other, be provided with circular-arc recess 70 on the top of each top retainer 38, one in described passage 69 and each recess 70 is communicated with.On the other hand, on intake-side camshaft 30, be provided with oily passage 71 coaxially, in part corresponding to each air inlet side cam retainer 41, on intake-side camshaft 30, be provided with and make the inner intercommunicating pore 72 that is communicated with oily passage 71, the outer end of intercommunicating pore 72 is towards the outer surface opening of intake-side camshaft 30, between each air inlet side cam retainer 41 and intake-side camshaft 30, supply with lubrication oil by described intercommunicating pore 72.
In addition, be provided with recess 73 constituting together on the lower surface of end cap 39 of air inlet side cam retainer 41 with top retainer 38, it is formed between the upper surface of described lower surface and top retainer 38 tunnel-shaped that is communicated with described recess 70, oil ejector 68 is installed on end cap 39, this oil ejector 68 is communicated with passage 74, passage 74 is communicated with recess 73, and is arranged at end cap 39.
Because oil ejector 68 is installed on the end cap 39 of intake cam retainer 41 that mode with rotatably mounted intake-side camshaft 30 is arranged at body of the internal-combustion engine 11, therefore, can utilize to be used for the oil circuit that is lubricated between intake-side camshaft 30 and the air inlet side cam retainer 41, supply with the abundant high pressure and the abundant oil of amount from oil ejector 68.
In addition, be connected in first coupling shaft, the 51 side fuel feeding of the top first and second coupling shafts 51,63 on the air inlet side rocking arm 31 from oil ejector 68 towards a end with first and second link arms 58,59, therefore, second connecting rod arm 59 sides below the oil after being lubricated between first connecting rod arm 58 and the air inlet side rocking arm 31 flows to.
And, make the oily introduction hole 75,76 of the part of the movable fulcrum 60 and second coupling shaft 63 towards intermediate portion, to be arranged at second connecting rod arm 59 with the direction of the straight line quadrature of the axis that is connected the movable fulcrum 60 and second coupling shaft 63, an end of each oily introduction hole 75,76 is towards first coupling shaft, 51 side openings.Therefore, the oil that flows to the below from first connecting rod arm 58 can import between second connecting rod arm 59 and the movable fulcrum 60 and second coupling shaft 63 effectively, thereby can be by simple and lubricating structure that part number is less joint to the air inlet side rocking arm 31 and first and second link arms 58,59, and be lubricated between second connecting rod arm 59 and the movable fulcrum 60, thereby can guarantee valve actuation stably.
Crank part 61, a plurality of cylinders single part shared, that be supported on body of the internal-combustion engine 11 of serving as reasons and forming a line, it constitutes crank shape, and has corresponding to each cylinder: the crankweb 61a, the 61a that are disposed at air inlet side rocking arm 31 both sides; With the cardinal extremity outer surface of two crankweb 61a, 61a vertical be connected and rotatably support in collar 61b, the 61b of body of the internal-combustion engine 11; And at the joint 61c that avoids and position that second connecting rod arm 59 is interfered connects as one between with two crankweb 61a, 61a.Movable fulcrum 60 is connected with crank part 61 in the mode that connects between two crankweb 61a, the 61a.
Each collar 61b of crank part 61, rotatably support is in the top retainer 38 that engages with the cylinder head 14 of body of the internal-combustion engine 11 with between below and the bottom retainer 77 that top retainer 38 engages.Bottom retainer 77 forms different individualities in the mode that is anchored on top retainer 38 with cylinder head 14, is provided with the recess 78 that is used to dispose bottom retainer 77 at the upper surface of cylinder head 14.
And, between upper and lower retainer 38,77 and collar 61b, be incorporated with roller bearing 79, between the collar 61b and upper and lower retainer 38,77 that this roller bearing 79 are encased in crank part 61, this roller bearing 79 can be in two, described crank part 61 has a plurality of crankweb 61a, 61a and joint 61c, and shared by a plurality of cylinders.
On upper and lower retainer 38,77, be formed with side-prominent crank part supporting convex portion 80, so that described collar 61a runs through towards the crankweb 61a of crank part 61.On the other hand, on for the common top retainer 38 and end cap 39 that constitutes air inlet side cam retainer 41 and be engaged with each other, to be formed with the camshaft supporting convex portion 81 that intake-side camshaft 30 is run through towards air inlet side rocking arm 31 outstanding modes, the outstanding integratedly rib 82 that is provided with on top retainer 38, its connecting crank parts are used between the supporting convex portion 81 with supporting convex portion 80 and camshaft.
In described rib 82, the passage 83 of oily guide roller bearing 79 sides is arranged to, communicate with the recess 70 of top retainer 38 upper surfaces.
In addition, exhaust side valve device 33 is arranged in such a way in cylinder head 14, be about to the swinging mounting portion of exhaust side rocking arm 36, be disposed at the outside of the portion that is connected of exhaust side rocking arm 36 and exhaust valve 21, relative therewith, above-mentioned air inlet side valve device 28 is arranged in such a way in cylinder head 14: the inboard that its air inlet side pitman arm shaft 57 and movable fulcrum 60 is disposed at the portion that is connected of air inlet side rocking arm 31 and intake valve 20.
And, between air inlet side and exhaust side valve device 28,33, on cylinder head 14, be equipped with to be used to make and relatively be installed on the spark plug tube 87 that the spark plug 86 of cylinder head 14 inserts, and this spark plug tube 87 is configured to obliquely along with moving closer to exhaust side valve device 33 towards the top with firing chamber 17.
And, the crank part 61 of air inlet side valve device 28, between intake valve 20 and described spark plug tube 87, so that joint 61c outer surface and described spark plug tube 87 opposed modes are configured, be used to avoid the clearance groove 88 of interfering with spark plug tube 87 and on the outer surface of joint 61c, be formed with.
In addition, when intake valve 20 is in closed condition, second connecting rod arm 59 is connected to second coupling shaft 63 on the air inlet side rocking arm 31, coaxial with the collar 61b of crank part 61, when crank part 61 during, move on the circular arc that movable fulcrum 60 is the center at the axis with collar 61b around the swing of the axis of collar 61b.
On described crank part 61, for example on one of the inblock cylinder column direction distolateral crankweb 61a, giving prominence to the rotation axis that is provided with crank part 61 is the backing pin 105 of the parallel axes of collar 61b, as shown in Figure 7, on the side wall inner surfaces of the valve mechanism cover 15 in body of the internal-combustion engine 11, the limiting holes 106 that is used to make the top of described backing pin 105 to insert forms, and is the circular-arc of center with the axis of described collar 61b.And the slewing area of crank part 61 is constrained to the scope that backing pin 105 can move in described limiting holes 106.That is, the backing pin 105 parallel with the rotation axis of crank part 61 given prominence to and is arranged at crankweb 61a, so that by limiting with the slewing area of coming crank part 61 that engages of body of the internal-combustion engine 11 sides.
In Fig. 9 and Figure 10, among the collar 61b that crank part 61 is had one, outstanding from the bearing hole 89 that is arranged at valve mechanism cover 15, be fixed with control arm 91 on the top of this collar 61b, this control arm 91 is driven by the actuator motor 62 that is installed on cylinder head 14 outer walls.That is, be engaged with nut part 93 on the thread spindle 92 that rotates by 62 drivings of actuator motor, on nut part 93, the other end of connecting rod 95 is connected with control arm 91 by pin 96,96 end of connecting rod 95 by pin 94 pivot suspensions.Therefore, when making 62 actions of actuator motor, nut part 93 moves along the thread spindle 92 of rotation, by the control arm 91 that is connected with nut part 93 through connection connecting rod 95, make crank part 61 around collar 61b swing, thereby make movable fulcrum 60 produce displacement.
On the outer wall of valve mechanism cover 15, be provided with for example rotation angle sensor 97 such as rotating coder, be fixed with an end of sensor arm 98 on the top of its sensor axis 97a.On control arm 91, be formed with along the guide groove 99 of the linearly extension of its length direction the chimeric slidably coupling shaft 100 that the sensor arm of being arranged at 98 the other ends are arranged in this guide groove 99.
In described variable valve lift device 32, when control arm 91 by actuator motor 62 from position shown in Figure 9 when counter clockwise direction is rotated, also to counterclockwise rotating, movable fulcrum 60 descends the crank part 61 that is connected in control arm 91.When under this state, passing through air inlet side valve driving cam 29 press-on roller 50 of intake-side camshaft 30, the four joint connecting rods that connect air inlet side pitman arm shaft 57, first coupling shaft 51, second coupling shaft 63 and movable fulcrum 60 deform, air inlet side rocking arm 31 is swung downwards, the push rod 20a of tappet screw 49,49 pushing intake valves 20, thus intake valve 20 is opened with low lift.
When control arm 91 rotated by the solid line position of actuator motor 62 in Fig. 9, the crank part 61 that is connected in control arm 91 rotated to clockwise direction, and movable fulcrum 60 rises.When under this state, passing through air inlet side valve driving cam 29 press-on roller 50 of admission cam shaft 30, described four joint connecting rods deform, air inlet side rocking arm 31 is swung downwards, the push rod 20a of tappet screw 49,49 pushing intake valves 20, thus intake valve 20 is opened with high lift.
Next, effect to this embodiment describes, open lift amount continually varying variable valve lift device 32 what be used for making intake valve 20, one end of first and second link arms 58,59 connects side by side and rotatably with the air inlet side rocking arm 31 with the valve joint 31a that is connected in linkage with a pair of intake valve 20, the other end of first connecting rod arm 58 is by air inlet side pitman arm shaft 57 rotatably supports that are supported on body of the internal-combustion engine 11, and movably movable fulcrum 60 rotatably supports are passed through in the other end of second connecting rod arm 59.
Therefore, can the lift amount of intake valve 20 infinitely be changed by movable fulcrum 60 is infinitely moved, and not need closure just can control air inflow.And, one end of first and second link arms 58,59 directly is connected with air inlet side rocking arm 31 rotationally, can reduce to dispose the space of two link arms 58,59, thereby can realize the valve device compactness, owing to directly be passed to the roller 50 of air inlet side rocking arm 31 from the power of air inlet side valve driving cam 29, so can guarantee good followability with respect to air inlet side valve driving cam 29.And can make air inlet side rocking arm 31, first and second link arms 58,59 in the position configuration on the direction of the axis of intake-side camshaft 30 in roughly the same position, can make air inlet side valve device 28 on the direction of the axis of intake-side camshaft 31, realize compactness.
In addition, one end of first connecting rod arm 58 is connected in air inlet side rocking arm 31 rotationally by first coupling shaft 51, roller 50 is supported on air inlet side rocking arm 31 by 51 of first coupling shafts, therefore realize an end of first connecting rod arm 58 and rotating connection of air inlet side rocking arm 31 by the first shared coupling shaft 51, and the axle supporting of described roller 50 on air inlet side rocking arm 31, thereby can reduce number of spare parts and make air inlet side valve device 28 compactness more.
At air inlet side and exhaust side valve device 28, in the air inlet side valve device 28 in 33 with variable linkage mechanism 32, air inlet side pitman arm shaft 57 and movable fulcrum 60 are disposed at the inboard of the portion that is connected of air inlet side rocking arm 31 and intake valve 20, the swinging mounting portion of the exhaust side rocking arm 36 that exhaust side valve device 33 is had is disposed at the outside of the portion that is connected of exhaust side rocking arm 36 and exhaust valve 21, even therefore in order to make firing chamber 17 compactnesss, to obtain good burning, and set the angle α (with reference to Fig. 1) of intake valve 20 and exhaust valve 21 less, also can avoid the maximization of cylinder head 14, and can prevent air inlet side and exhaust side valve device 28,33 interfere mutually.
In addition, exhaust side valve device 33 comprises: the exhaust side camshaft 35 with exhaust side valve driving cam 34; And exhaust side rocking arm 36, it is swung in order to be driven in exhaust side valve driving cam 35, and is supported on body of the internal-combustion engine 11 swingably by exhaust side pitman arm shaft 43, and is connected in linkage with exhaust valve 21.The spark plug tube 68 that is disposed between air inlet side and the exhaust side valve device 28,33 is installed on the cylinder head 14, and it is inclined to along with moving closer to exhaust side valve device 33 towards the top, therefore, spark plug tube 68 can be configured to prevent and the interference of air inlet side and exhaust side valve device 28,33, help to make cylinder head 14 integral body compactness more.
In addition, the crank part 61 that the variable linkage mechanism 32 of air inlet side valve device 28 is had constitutes crank-like, and has: from crankweb 61a, the 61a of sandwich second connecting rod arm 59; And will described two crankweb 61a, 61a in the position of avoiding interfering engage joint 61c into one with second connecting rod arm 59, movably fulcrum 63 is connected with crank part 61 to connect two modes between crankweb 61a, the 61a.Therefore, can strengthen the rigidity that is driven the crank part 61 that carries out angular displacement, even and the required torque of the rotation of crank part 61 is bigger, also can make the torsional strength burden of movable fulcrum 63 less, and make movable fulcrum 63 be different individualities with crank part 61 owing to can constitute, insert at the movable fulcrum that makes a pair of crankweb 61a, 61a and second connecting rod arm 59 under the state of logical portion alignment, insert movable fulcrum 63 by being pressed into to wait, thereby be easy to assemble.And, therefore can avoid the maximization of crank part 61 and second connecting rod arm 59 because the joint 61c of crank part 61 can not interfere with second connecting rod arm 59.
In addition, backing pin 105 outstanding the be arranged at crankweb 61as parallel with the rotation axis of crank part 61, so that by the slewing area to crank part 61 limits with body of the internal-combustion engine 11 engaging of side, therefore can be used in the compact structureization of the slewing area of restriction crank part 61.
In addition, crank part 61 is connected with movable fulcrum 60 around the mode of the axis generation angular displacement that is parallel to its axis can make movable fulcrum 60, and, crank part 61 at the two-side supporting of air inlet side rocking arm 31 in body of the internal-combustion engine 11, the rigidity of crank part 61 can be improved by dual-supporting, the variable control of lift amount of intake valve 20 can be critically carried out.
In addition, single described crank part 61 is supported on body of the internal-combustion engine 11 by a plurality of cylinder common lands that form a line, and therefore can avoid number of spare parts to increase, thereby can realize the compactness of internal-combustion engine E.
The collar 61b of described crank part 61, be rotatably supported between top retainer 38 and the bottom retainer 77, this top retainer 38 engages with the cylinder head 14 of body of the internal-combustion engine 11, this bottom retainer 77 engages with top retainer 38 from the below, can improve the assembling performance of crank part 61 on body of the internal-combustion engine 11, and since with cylinder head 14 for the bottom retainer 77 of Different Individual is fastened on the top retainer 38, therefore can improve the design freedom of the cylinder head 14 when supporting crank part 61.
In addition, between upper and lower retainer 38,77 and collar 61b, be incorporated with can be in two roller bearing 79, therefore can be reduced in the frictional loss on the support of crank part 61, can improve the assembling performance of crank part 61.
In addition, on interconnective upper and lower retainer 38,77, be formed with side-prominent crank part supporting convex portion 80 towards the crankweb 61a of crank part 61, therefore the collar 61b rotatably support that runs through crank part usefulness supporting convex portion 80 can further improve the supporting rigidity of crank part 61 between upper and lower retainer 38,77.
In addition, top retainer 38 with from above be engaged on the end cap 39 of top retainer 38, be formed with the camshaft supporting convex portion 81 of giving prominence to towards air inlet side rocking arm 31, intake-side camshaft 30 runs through camshaft supporting convex portion 81, can be rotated to support between top retainer 38 and the end cap 39, therefore the number of spare parts that is used to support intake-side camshaft 30 inferior limit can be suppressed at, the supporting rigidity of intake-side camshaft 30 can be improved.
In addition, the connecting crank parts are given prominence to the rib between the supporting convex portion 81 82 with supporting convex portion 80 and camshaft and are arranged at top retainers 38, therefore can further improve the supporting rigidity of crank part 61 and intake-side camshaft 30.
In addition, crank part 61, at intake valve 20 be arranged between the spark plug tube 87 of cylinder head 14 and be configured to, make outer surface and the spark plug tube 87 of joint 61c opposed, on the outer surface of described joint 61c, be formed with and be used to avoid produce the clearance groove 88 of interfering with spark plug tube 87, therefore, spark plug tube 87 can be configured to make it, can realize the compactness of internal-combustion engine E more near air inlet side valve device 28 sides.
In the air inlet side rocking arm 31 of air inlet side valve device 28, on the surface of the reciprocal side of its valve joint 61a, be formed with staggered weight saving portion 53,54,54, therefore can realize the lightweight of air inlet side rocking arm 31.
And, when air inlet side rocking arm 31 mould-formings, also form each weight saving portion 53,54,54, and weight saving portion 53,54 adjacent one another are, 53,54 pattern draft is reverse each other, so weight saving portion 53,54 adjacent one another are, 53,54 inner side surface tilts to same direction, so in weight saving portion adjacent one another are 53,54,53, be formed at the 31d of wall portion of air inlet side rocking arm 31, the thickness approximate equality of 31d between 54, can keep the rigidity of air inlet side rocking arm 31 by the 31d of wall portion, the 31d of thickness approximate equality.
In addition, air inlet side valve device 28, owing to have the variable valve lift device 32 that the lift amount that makes intake valve 20 infinitely changes, therefore number of spare parts is more, even in air inlet side valve device 28 with the variable valve lift device 32 that becomes the reason that causes the increase of air inlet side valve device 28 weight easily, by making 31 lightweights of air inlet side rocking arm, also can realize the lightweight of air inlet side valve device 28, can increase limit revolution.
More than embodiments of the invention are illustrated, but the invention is not restricted to the foregoing description, without departing from the scope of the invention, can carry out various design alterations.
Claims (11)
1. the variable valve lift device of an internal-combustion engine, it comprises: rocking arm (31), it has the cam abutting part (50) with valve driving cam (29) butt, and is connected in linkage with engine valve (20); First connecting rod arm (58), one end are connected with this rocking arm (31) rotationally, and a fixed pivot axis (57) rotatably support is passed through in the fixed position of body of the internal-combustion engine (11) in its other end; Second connecting rod arm (59), one end are connected with described rocking arm (31) rotationally; Movable fulcrum (60), the other end of its rotatably support second connecting rod arm (59); Crank part (61), it is can making this movable fulcrum (60) around being connected with described movable fulcrum (60) with mode that the axis of its parallel axes carries out angular displacement, and rotatably support is in described body of the internal-combustion engine (11); And driver element (62), it is connected with described crank part (61), so that make described movable fulcrum (60) that angular displacement take place, described variable valve lift device is characterised in that,
Described crank part (61) constitutes crank-like, and has crankweb (61a) from sandwich second connecting rod arm (59), with the joint (61c) that in the position of avoiding interfering with second connecting rod arm (59) described two crankwebs (61a) is engaged to one, described movable fulcrum (60) is connected with crank part (61) in the mode that connects between two crankwebs (61a).
2. the variable valve lift device of internal-combustion engine according to claim 1 is characterized in that,
The backing pin (105) parallel with the rotation axis of described crank part (61) is outstanding to be arranged at described crankweb (61a), so that by limiting with the slewing area of coming described crank part (61) that engages of described body of the internal-combustion engine (11) side.
3. the variable valve lift device of internal-combustion engine according to claim 1 and 2 is characterized in that,
Described crank part (61) at the two-side supporting of described rocking arm (31) in described body of the internal-combustion engine (11).
4. the variable valve lift device of internal-combustion engine according to claim 1 is characterized in that,
The single described crank part (61) that a plurality of cylinders that form a line are shared is supported on body of the internal-combustion engine (11).
5. the variable valve lift device of internal-combustion engine according to claim 1 is characterized in that,
Described crank part (61) has the vertical collar that links to each other of outer surface (61b) with described crankweb (61a), at top retainer (38) and be engaged in from the below between the bottom retainer (77) of top retainer (38), rotatably support has described collar (61b), described top retainer (38) constitutes the part of cam retainer (41) and engages the rotatably mounted camshaft (30) that is provided with described valve driving cam (29) of this cam retainer (41) with the cylinder head (14) of body of the internal-combustion engine (11).
6. the variable valve lift device of internal-combustion engine according to claim 5 is characterized in that,
Be anchored on described top retainer (38) with described cylinder head (14) for the described bottom retainer (77) of Different Individual.
7. according to the variable valve lift device of claim 5 or 6 described internal-combustion engines, it is characterized in that,
In described upper and lower retainer (38,77), and be incorporated with between the described collar (61b) can be in two roller bearing (79).
8. the variable valve lift device of internal-combustion engine according to claim 5 is characterized in that,
Go up formation towards the side-prominent crank part supporting convex portion (80) of described crankweb (61a) at the upper and lower retainer that is bonded with each other (38,77), run through this crank part and use described collar (61b) rotatably support of supporting convex portion (80) between upper and lower retainer (38,77).
9. the variable valve lift device of internal-combustion engine according to claim 8 is characterized in that,
At described top retainer (38) be engaged in from the top on the end cap (39) of top retainer (38), be formed with towards the side-prominent camshaft of described rocking arm (31) with supporting convex portion (81), the camshaft (30) with described valve driving cam (29) run through described camshaft with supporting convex portion (81) and be rotatably supported in described top retainer (38) and end cap (39) between.
10. the variable valve lift device of internal-combustion engine according to claim 9 is characterized in that,
Connect described crank part with supporting convex portion (80) and described camshaft with the outstanding described top retainer (38) that is arranged at of the rib (82) between the supporting convex portion (81).
11. the variable valve lift device of internal-combustion engine according to claim 1 is characterized in that,
Described crank part (61) is at described engine valve (20) and be arranged at and be configured to make the outer surface of described joint (61c) and described spark plug tube (87) opposed between the spark plug tube (87) of cylinder head (14), is formed with to be used to avoid the clearance groove (88) of interfering with spark plug tube (87) on the outer surface of described joint (61c).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP426069/2003 | 2003-12-24 | ||
| JP2003426069A JP4008411B2 (en) | 2003-12-24 | 2003-12-24 | Valve lift variable device for internal combustion engine |
| JP023952/2004 | 2004-01-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1902382A CN1902382A (en) | 2007-01-24 |
| CN100395434C true CN100395434C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800391160A Expired - Fee Related CN100395434C (en) | 2003-12-24 | 2004-12-21 | Variable valve lift device of internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4008411B2 (en) |
| CN (1) | CN100395434C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100926556B1 (en) * | 2007-12-14 | 2009-11-12 | 현대자동차주식회사 | Continuous variable valve lift apparatus |
| CN102678216B (en) * | 2011-03-08 | 2016-03-09 | 朱譞晟 | The full Variable Valve Time of variable linear chute and lift mechanisms |
| DE102013102231B4 (en) * | 2013-03-06 | 2016-02-25 | Uwe Eisenbeis | Variable valve train for actuating a valve of an internal combustion engine |
| JP6055709B2 (en) * | 2013-03-29 | 2016-12-27 | 本田技研工業株式会社 | Intake device for internal combustion engine |
| CN103775159B (en) * | 2014-01-23 | 2017-02-01 | 长城汽车股份有限公司 | Air distribution mechanism for engine and vehicle with same |
| JP2016035252A (en) * | 2014-08-04 | 2016-03-17 | トヨタ自動車株式会社 | Internal combustion engine valve gear device |
| DE102017009535A1 (en) * | 2017-10-13 | 2019-04-18 | Daimler Ag | Valve drive for an internal combustion engine of a motor vehicle |
| EP3623592A1 (en) * | 2018-09-17 | 2020-03-18 | Uwe Eisenbeis | Variable valvetrain having lubricant supply system |
| CN109653831A (en) * | 2019-01-03 | 2019-04-19 | 浙江大学 | A kind of continuous variable valve lift device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111781A (en) * | 1990-03-14 | 1992-05-12 | Suzuki Kabushiki Kaisha | Valve actuating mechanism in four-stroke cycle engine |
| JPH0571321A (en) * | 1991-09-11 | 1993-03-23 | Nissan Motor Co Ltd | Variable valve system for internal combustion engine |
| CN1203309A (en) * | 1997-06-24 | 1998-12-30 | 本田技研工业株式会社 | Valve operating system in internal combustion engine |
| JP2003113722A (en) * | 2001-10-03 | 2003-04-18 | Honda Motor Co Ltd | Engine with plurality of exhaust valves |
-
2003
- 2003-12-24 JP JP2003426069A patent/JP4008411B2/en not_active Expired - Fee Related
-
2004
- 2004-12-21 CN CNB2004800391160A patent/CN100395434C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5111781A (en) * | 1990-03-14 | 1992-05-12 | Suzuki Kabushiki Kaisha | Valve actuating mechanism in four-stroke cycle engine |
| JPH0571321A (en) * | 1991-09-11 | 1993-03-23 | Nissan Motor Co Ltd | Variable valve system for internal combustion engine |
| CN1203309A (en) * | 1997-06-24 | 1998-12-30 | 本田技研工业株式会社 | Valve operating system in internal combustion engine |
| JP2003113722A (en) * | 2001-10-03 | 2003-04-18 | Honda Motor Co Ltd | Engine with plurality of exhaust valves |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005180401A (en) | 2005-07-07 |
| CN1902382A (en) | 2007-01-24 |
| JP4008411B2 (en) | 2007-11-14 |
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