CN100396892C - Engine - Google Patents
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- CN100396892C CN100396892C CNB2005800033625A CN200580003362A CN100396892C CN 100396892 C CN100396892 C CN 100396892C CN B2005800033625 A CNB2005800033625 A CN B2005800033625A CN 200580003362 A CN200580003362 A CN 200580003362A CN 100396892 C CN100396892 C CN 100396892C
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- air inlet
- intake
- inlet side
- exhaust side
- exhaust
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Abstract
An engine, wherein an intake valve openably driven by an intake side valve system having an intake side camshaft and an exhaust valve openably driven by an exhaust side valve system having an exhaust side camshaft are disposed in a cylinder head forming a part of an engine body. The intake side camshaft (30) is disposed at a position such that the distance thereof from a combustion chamber (17) is larger than that in the case of the exhaust side camshaft (35) along the axis (C) of the cylinder of the engine body (11) to position the intake side camshaft higher than the exhaust side camshaft (35). Thus, the exhaust side valve system can be efficiently lubricated and cooled by easily using a lubricating oil, used for lubricating and cooling the intake side valve system, for the exhaust side valve system.
Description
Technical field
The present invention relates to a kind of motor, it is equipped with on the cylinder head of a part that constitutes engine main body: drive intake valve that opens and closes and the exhaust valve that is opened and closed by the exhaust side valve device driving with exhaust side camshaft by the air inlet side valve device with intake-side camshaft.
Background technique
Such motor is by for example patent documentation 1 is known.
Patent documentation 1: Japanese patent gazette spy opens 2004-52708 number
In addition, compare with air inlet side valve device, lubricated and the cooling of exhaust side valve device must be carried out in the thermal environment of harshness, if the exhaust side valve device also can use the lower air inlet side valve device of temperature lubricated and cooled lubricant oil have been carried out, then can carry out the lubricated and cooling of exhaust side valve device efficiently, but, in above-mentioned patent documentation 1, the intake-side camshaft of air inlet side valve device and the exhaust side camshaft of exhaust side valve device, on the direction of the cylinder-bore axis of engine main body, be disposed at same position, thereby be difficult to the lubricant oil after the lubricated use of intake-side camshaft is used for the lubricated and cooling of exhaust side valve device.
Summary of the invention
The present invention is directed to the problems referred to above and propose, its purpose is to provide a kind of motor, lubricant oil after can easily lubricated the and cooling of air inlet side valve device being used is used for the exhaust side valve device, can carry out the lubricated and cooling of exhaust side valve device efficiently.
To achieve these goals, in accordance with a first feature of the invention, provide a kind of motor, on the cylinder head of a part that constitutes engine main body, be equipped with: drive the intake valve that opens and closes by air inlet side valve device with intake-side camshaft; With the exhaust valve that opens and closes by exhaust side valve device driving with exhaust side camshaft, intake-side camshaft is disposed at such position: along the cylinder-bore axis of engine main body, intake-side camshaft is apart from the distance of the firing chamber position greater than the distance of exhaust side cams wheelbase firing chamber, so that intake-side camshaft is in the position higher than exhaust side camshaft, air inlet side valve device has the lift changeable mechanism that lift amount changes of opening that can make intake valve, the exhaust side valve device has described exhaust side camshaft and exhaust side rocking arm, described exhaust side rocking arm is connected in linkage with exhaust valve, and be driven in described exhaust side camshaft and swing, it is characterized in that described air inlet side valve device constitutes and comprises: the intake-side camshaft with air inlet side valve driving cam; Air inlet side rocking arm, its mode with the power of giving the valve-closing direction is connected in linkage with intake valve, and has the cam abutting part with described air inlet side valve driving cam butt; And described lift changeable mechanism, this lift changeable mechanism comprises: first connecting rod arm, one end are connected with described air inlet side rocking arm rotationally, and a fixed pivot axis rotatably support is passed through in the fixed position of engine main body in its other end; With the second connecting rod arm, the one end is connected with air inlet side rocking arm rotationally, and its other end is by displaceable movable fulcrum rotatably support.
According to second feature of the present invention, a kind of motor is provided, on the basis of above-mentioned first feature structure, it is characterized in that the attitude of described engine main body is set for: make its cylinder-bore axis oblique to the inclination of described exhaust side valve device.
According to the 3rd feature of the present invention, a kind of motor is provided, on the basis of above-mentioned first feature structure, it is characterized in that the sense of rotation of described intake-side camshaft is set for: with the opposed side direction of described exhaust side valve device on rotate.
According to the 4th feature of the present invention, a kind of motor is provided, on the basis of above-mentioned first feature structure, it is characterized in that, described a fixed pivot axis and movable fulcrum are disposed at the inboard of the portion that is connected of described air inlet side rocking arm and intake valve, and the swinging mounting portion of the exhaust side rocking arm that described exhaust side valve device is had is disposed at the outside of the portion that is connected of exhaust side rocking arm and exhaust valve.
According to the 5th feature of the present invention, a kind of motor is provided, on the basis of above-mentioned the 4th feature structure, it is characterized in that, spark plug tube is inclined to along with towards the top and approaching with the exhaust side valve device gradually, spark plug tube is disposed between described air inlet side valve device and the described exhaust side valve device, and is installed on the cylinder head.
In accordance with a first feature of the invention, because intake-side camshaft is in the position higher than exhaust side camshaft, therefore, can easily make to the lower air inlet side valve device of temperature carried out lubricated and cooled flow of lubricant to the exhaust side valve device, thereby can carry out the lubricated and cooling of the exhaust side valve device in the harsh thermal environment efficiently.By the lift changeable mechanism lift amount of intake valve is changed, thereby do not need closure just can control air inflow, and the lift changeable mechanism can be configured in effectively than exhaust side valve device side and have in the space of air inlet side valve device side of surplus.Be directly connected in rocking arm rotationally by an end that makes first and second link arms that constitute the lift changeable mechanism, and the space that can reduce to dispose two link arms, can realize the miniaturization of air inlet side valve device, and owing to directly be passed to the cam abutting part of air inlet side rocking arm, so can guarantee good followability with respect to the valve driving cam from the power of air inlet side valve driving cam.
According to second feature of the present invention, cylinder-bore axis by making engine main body is oblique to the inclination of exhaust side valve device, carried out lubricated and cooled lubricant oil flows to exhaust side valve device side more efficiently to air inlet side valve device, thereby can further carry out the lubricated and cooling of exhaust side valve device efficiently.
According to the 3rd feature of the present invention, the rotation by intake-side camshaft makes lubricating oil splash to exhaust side valve device side, thereby can carry out the lubricated and cooling of exhaust side valve device more efficiently by the spittle of the lubricant oil that splashes.
According to the 4th feature of the present invention, the a fixed pivot axis of first and second link arms and movable fulcrum, be disposed at the inboard of the portion that is connected of air inlet side rocking arm and intake valve, the swinging mounting portion of the exhaust side rocking arm that the exhaust side valve device is had is disposed at the outside of the portion that is connected of exhaust side rocking arm and exhaust valve, even therefore make the firing chamber miniaturization set the angle of intake valve and exhaust valve less to obtain good burning, also can avoid the maximization of cylinder head, and can prevent the mutual interference of air inlet side and exhaust side valve device.
According to the 5th feature of the present invention, spark plug tube is configured to avoid the interference with air inlet side and exhaust side valve device, thereby helps to make the further miniaturization of cylinder head integral body.
Description of drawings
Fig. 1 is the partial longitudinal section of motor, is the sectional drawing along the 1-1 line among Fig. 2.(first embodiment)
Fig. 2 is the view along 2 directions of the arrow among Fig. 1.(first embodiment)
Fig. 3 is the sectional drawing along the 3-3 line among Fig. 2.(first embodiment)
Fig. 4 is the major component enlarged view of Fig. 1.(first embodiment)
Fig. 5 is the worm's eye view that arrow 5 directions from Fig. 4 are observed air inlet side rocking arm.(first embodiment)
Fig. 6 is the 6-6 line sectional drawing of Fig. 4.(first embodiment)
Fig. 7 is the stereogram of lift changeable mechanism.(first embodiment)
Fig. 8 is the sectional drawing along the 8-8 line among Fig. 4.(first embodiment)
Fig. 9 is the view along the 9-9 line direction among Fig. 2.(first embodiment)
Figure 10 is the stereogram that arrow 10 directions from Fig. 9 are seen.(first embodiment)
Label declaration
11: engine main body; 14: cylinder head; 17: the firing chamber; 20: intake valve; 21: exhaust valve; 28: air inlet side valve device; 29: air inlet side valve driving cam; 31: air inlet side rocking arm; 32: the lift changeable mechanism; 33: the exhaust side valve device; 34: exhaust side valve driving cam; 35: exhaust side camshaft; 36: the exhaust side rocking arm; 37: sense of rotation; 39: air inlet side cam; 43: the exhaust side pitman arm shaft; 50: as the roller of cam abutting part; 57: 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; 87: spark plug tube; C: cylinder-bore axis; E: motor.
Embodiment
One embodiment of the present of invention shown in reference to the accompanying drawings describe embodiments of the present invention below.
Fig. 1～Figure 10 represents one embodiment of the present of invention.
At first in Fig. 1, the engine main body 11 of the motor E of multi cylinder in upright arrangement comprises: inside is provided with the cylinder block 13 of cylinder thorax 12; The cylinder head 14 that engages with the end face of cylinder block 13; And the valve mechanism cover 15 that engages with the end face of cylinder head 14, chimeric slidably in each cylinder thorax 12 have a piston 16, is formed between cylinder block 13 and the cylinder head 14 towards the firing chamber 17 at the top of each piston 16.
Be provided with the suction port 18 and the relief opening 19 that can be communicated with each firing chamber 17 on cylinder head 14, each suction port 18 is opened and closed by a pair of intake valve 20 respectively, and each relief opening 19 is opened and closed by a pair of exhaust valve 21 respectively.Between spring seat 22 and cylinder head 14, be provided with the valve spring 23 of each intake valve 20 towards the valve closing direction application of force, this spring seat 22 is arranged at the upper end portion of the push rod 20a that intake valve 20 had.In addition, be provided with between spring seat 24 and cylinder head 14 valve spring 25 of each exhaust valve 21 towards the valve closing direction application of force, this spring seat 24 is arranged at the upper end portion of the push rod 21a that exhaust valve 21 had.
Drive the air inlet side valve device 28 that each intake valve 20 opens and closes, comprise 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 mechanism 32.The exhaust side valve device 33 that drives exhaust valve 21 switchings 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.
And the attitude of engine main body 11 is set for: make its cylinder-bore axis C and plumb line VL angulation θ be for example 20 degree, and oblique to 33 inclinations of exhaust side valve device.
In the lump with reference to Fig. 2 and Fig. 3, on cylinder head 14, be fastened with upper support 38 in the mode that is disposed at each cylinder both sides, on each upper support 38 from above be fastened with end cap 39,40, described end cap 39,40 is collaborative to constitute air inlet side cam supporting member 41 and exhaust side cams supporting members 42.And, rotatably mounted between the upper support 38 that constitutes air inlet side cam supporting member 39 and end cap 39 have an intake-side camshaft 30, and rotatably mounted between the upper support 38 of collaborative formation exhaust side cams supporting member 42 and end cap 40 have an exhaust side camshaft 35.
And the upper surface of upper support 38 forms has step, and the part that makes supporting intake-side camshaft 30 is 17 distance apart from the firing chamber, greater than the part of supporting exhaust side camshaft 35 apart from the firing chamber 17 distance.Thus, intake-side camshaft 30 is disposed at such position: along the cylinder-bore axis C of engine main body 11, intake-side camshaft 30 apart from the firing chamber 17 distance greater than the position of exhaust side camshaft 35 distance of 17, so that intake-side camshaft 30 is in the position higher than exhaust side camshaft 35 apart from the firing chamber.
In addition, intake-side camshaft 30 and exhaust side camshaft 35 are driven in rotation by the power with 1/2 reduction speed ratio transmission of illustrated crankshaft never, but being set on a side direction relative with exhaust side valve device 33, the sense of rotation 37 of intake-side camshaft 30 rotates, under the state of Fig. 1, the rotation of intake-side camshaft 30 clockwise directions.
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 upper support 38 supportings, be combined with a pair of adjusting screw 44,44, the upper end butt of the push rod 21a of this a pair of adjusting screw 44,44 and a pair of exhaust valve 21 in the other end of exhaust side rocking arm 36 can regulate advance and retreat position.In addition, be provided with the axle 45 parallel with exhaust side pitman arm shaft 36 at the intermediate portion of exhaust side rocking arm 36, with exhaust side valve driving cam 34 roll the roller 47 that contact between it is with described 45 insertion roller bearing 46 ground axle suspensions in exhaust side rocking arm 36.
Such exhaust side valve device 33 is equipped on cylinder head 14 as follows: with the swinging mounting portion of 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 adjusting screw 44.
In Fig. 4 and Fig. 5, be provided with valve joint 31a in an end of air inlet side rocking arm 31, this valve joint 31a is combined with adjusting screw 49,49 with going up can regulate advance and retreat position, and described adjusting screw 49,49 is from the upper end butt of the push rod 20a of top and a pair of intake valve 20.In addition, the other end at air inlet side rocking arm 31, be provided with the first support 31b that is connected with each other and be disposed at the second support 31c of first support 31b below, the first and second support 31b, 31c form the roughly U word shape that the opposition side to intake valve 20 opens wide.
On the first support 31b of air inlet side rocking arm 31, be supported with roller 50 by first coupling shaft 51 and 52 on roller bearing as the cam abutting part, this roller 50 rolls with the air inlet side valve driving cam 29 of intake-side camshaft 30 and contacts, and roller 50 is configured to by the roughly first support 31b clamping of U word shape.
In the lump with reference to Fig. 6, air inlet side rocking arm 31 is by the die formings such as casting of light alloy, central part at the upper surface of its valve joint 31a, be formed with for example weight saving portion 53 of general triangular, valve joint 31a, as the both sides of the lower surface of the face of the opposition side of described upper surface, be formed with a pair of weight saving portion 54,54, this a pair of weight saving portion 54,54 is configured to replace mutually with described weight saving portion 53.
In addition, described weight saving portion 53,54,54 are shaped when the die forming of air inlet side rocking arm 31 simultaneously, the pattern draft of the weight saving portion 53 of top is such direction: along with the upper surface towards valve joint 31a, make the opening area of weight saving portion 53 become big direction, relative therewith, the weight saving portion 54 of below, 54 pattern draft is such direction: along with the lower surface towards valve joint 31a, make weight saving portion 54,54 opening area becomes big direction, so the true dip direction and the weight saving portion 54 of the inner side surface of weight saving portion 53, the true dip direction of 54 inner side surface is identical, in weight saving portion 53 adjacent one another are, 54; 53, be formed at the 31d of wall portion of valve joint 31a, the thickness approximate equality of 31d between 54.
In the lump with reference to Fig. 7 and Fig. 8, lift changeable mechanism 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 engine main body 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; Control Shaft 61, it is connected with this movable fulcrum 60, and can make this movable fulcrum 60 around with the axis generation angular displacement of its parallel axes; And, actuator motor 62, it is connected with Control Shaft 61, so that angular displacement takes place movable fulcrum 60.
One end of first connecting rod arm 58 forms roughly U word shape, and from the first support 31b of sandwich air inlet side rocking arm 31, and be connected with the first support 31b rotationally by first coupling shaft 51, this first coupling shaft 51 is supported on air inlet side rocking arm 31 with 50 on roller.In addition, the air inlet side pitman arm shaft 57 of the other end of rotatably support first connecting rod arm 58 is supported by the upper support 38 that is anchored on cylinder head 14.
Be disposed at an end of the second connecting rod arm 59 of first connecting rod arm 58 belows, be configured to the second support 31c clamping, and be connected in the second support 31c rotationally by second coupling shaft 63 by air inlet side rocking arm 31.
Both sides in the other end of first connecting rod arm 58, the outstanding integratedly supporting convex 64,64 that is provided with on upper support 38,38, with supporting air inlet side pitman arm shaft 57, the other end of limiting first connecting rod arm 58 by these supporting convex 64 is moving on the direction of the axis of described air inlet side pitman arm shaft 57.
In addition, two intake valves 20 are applied elastic force by valve spring 23 to the direction of valve-closing, drive by when the valve-closing direction applies two intake valves 20 of elastic force when opening direction to valve by air inlet side rocking arm 31, the roller 50 of air inlet side rocking arm 31, by the effect of valve spring 23 with air inlet side valve driving cam 29 butts, and under intake valve 20 closing state, the elastic force of valve spring 23 can not act on air inlet side rocking arm 31, roller 50 leaves air inlet side valve driving cam 29, thereby might cause the control accuracy of the valve lift amount of intake valve 20 when opening slightly to reduce.Therefore, by the rocking arm force application spring 65 that is provided with separately with valve spring 23, air inlet side rocking arm 31 is by 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 engine main body 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 sticked in first coupling shaft 51 of hollow, and described first coupling shaft 51 moves 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, on the axial two ends of the other end of first connecting rod arm 58, give prominence to along the circumferentially spaced compartment of terrain respectively and be provided with a plurality of for example a pair of teats 66,67, described teat 66,67 is used to stop rocking arm force application spring 65 to swing to first connecting rod arm 58 sides.Therefore can avoid the maximization of the other end of first connecting rod arm 58, and can prevent that the described of rocking arm force application spring 65 from toppling over, thereby can improve the supporting rigidity of the other end of first connecting rod arm 58.
Therefore and the actuating range that described teat 66,67 is avoided second connecting rod arm 59 is configured, although teat 66,67 is arranged at the other end of first connecting rod arm 58, also can fully guarantee the actuating range of second connecting rod arm 59.
On the end cap 39 of the air inlet side cam supporting member 41 that is arranged at engine main body 11 oil ejector 68 is installed, this oil ejector 68 is towards the other end upper lateral part fuel feeding of air inlet side rocking arm 31.
In addition, be provided with passage 69 on one in a plurality of upper support 38, this passage 69 is used to guide the oil from 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 upper support 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 supporting member 41, on intake-side camshaft 30, be provided with intercommunicating pore 72, the inner of intercommunicating pore 72 is communicated with oily passage 71, lubrication oil between each air inlet side cam supporting member 41 and intake-side camshaft 30, supplied with by described intercommunicating pore 72 at the outer surface opening of intake-side camshaft 30 in the outer end of intercommunicating pore 72.
In addition, on the lower surface of the end cap 39 that constitutes air inlet side cam supporting member 41 with upper support 38, be provided with recess 73, this recess 73 its with the upper surface of upper support 38 between form the passage that is communicated with described recess 70, oil ejector 68 is installed on end cap 39, and link to each other with passage 74, and this passage 74 is arranged at end cap 39 and be communicated with recess 73.
Like this, air inlet side cam supporting member 46 modes with rotatably mounted intake-side camshaft 30 are arranged at engine main body 11, on the end cap 39 of this air inlet side cam supporting member 46, oil ejector 68 is installed, therefore can utilize to be used for the oil circuit that is lubricated between intake-side camshaft 30 and the air inlet side cam supporting member 41, from the oil of oil ejector 68 supply sufficiently high pressures and q.s.
And, first and second coupling shafts 51,63 are connected to an end of first and second link arms 58,59 on the air inlet side rocking arm 31, and from first coupling shaft, the 51 side fuel feeding of the top of oil ejector 68 to first and second coupling shafts 51,63, therefore to having carried out second connecting rod arm 59 sides of lubricated oil below flowing between first connecting rod arm 58 and the air inlet side rocking arm 31.
And, oil introduction hole 75,76 makes the intermediate portion of the part of the movable fulcrum 60 and second coupling shaft 63 towards described oily introduction hole 75,76, described oily introduction hole 75,76 with the direction of the straight line quadrature of the axis that is connected the movable fulcrum 60 and second coupling shaft 63 on be arranged at second connecting rod arm 59, 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 is imported between second connecting rod arm 59 and the movable fulcrum 60 and second coupling shaft 63 effectively, thereby can be by number of spare parts few and simple lubricating structure, air inlet side rocking arm 31 is lubricated between the joint of first and second link arms 58,59 and second connecting rod arm 59 and movable fulcrum 60, can guarantees smooth-going valve actuation.
Control Shaft 61 is the shared single axles of a plurality of cylinders by forming a line that are supported on engine main body 11, and it constitutes crank-like, and has respectively corresponding to each cylinder: the crankweb 61a, the 61a that are disposed at air inlet side rocking arm 31 both sides; Collar 61b, 61b, its base end part outer surface with two crankweb 61a, 61a at right angles is connected, and rotatably support is in engine main body 11; And connecting joint 61c between two crankweb 61a, the 61a, movable fulcrum 60 is connected with Control Shaft 61 in the mode that connects between two crankweb 61a, the 61a.
Each collar 61b rotatably support of Control Shaft 61 is between upper support 38 and lower part support 77, and this upper support 38 engages with the cylinder head 14 of engine main body 11, and this lower part support 77 engages with upper support 38 from the below.Lower part support 77 forms respectively with cylinder head 14, and is anchored on upper support 38, is provided with the recess 78 that is used to dispose lower part support 77 at the upper surface of cylinder head 14.
And between upper and lower supporting member 38,77 and collar 61b, be incorporated with roller bearing 79, this roller bearing 79 is between the collar 61b of the Control Shaft 61 of packing into and the upper and lower supporting member 38,77 and can dimidiation, this Control Shaft 61 is shared by a plurality of cylinders, and has a plurality of crankweb 61a, 61a and joint 61c.
In addition, on upper and lower supporting member 38,77, be formed with and be used to make Control Shaft that described collar 61a runs through with supporting convex portion 80, this Control Shaft is side-prominent towards the crankweb 61a of Control Shaft 61 with supporting convex portion 80.On the other hand, on for the collaborative upper support 38 and end cap 39 that constitutes air inlet side cam supporting member 41 and be bonded with each other, be formed with the camshaft supporting convex portion 81 that intake-side camshaft 30 is run through, this camshaft is outstanding towards air inlet side rocking arm 31 with supporting convex portion 81, on the upper support 38 outstanding integratedly be provided with connect Control Shaft with supporting convex portion 80 and camshaft with the rib 82 between the supporting convex portion 81.
Be provided with the passage 83 with oily guide roller bearing 79 sides in described rib 82, this passage 83 is communicated with the recess 70 of the upper surface of upper support 38.
In addition, exhaust side valve device 33 is equipped on cylinder head 14 by this way: make the swinging mounting portion of exhaust side rocking arm 36 be disposed at the outside of exhaust side rocking arm 36 and the portion that is connected of exhaust valve 21, relative therewith, above-mentioned air inlet side valve device 28 is equipped on cylinder head 14 by this way: make its air inlet side pitman arm shaft 57 and movable fulcrum 60 be disposed at the inboard of 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, the spark plug tube 87 that is used to insert spark plug 86 is installed on cylinder head 14,17 ground are installed on cylinder head 14 to this spark plug 86 towards the firing chamber, and these spark plug tube 87 tilted configuration become along with moving closer to exhaust side valve device 33 towards the top.
And, Control Shaft 61 in the air inlet side valve device 28 is configured to: make the outer surface of joint 61c and described spark plug tube 87 opposed between intake valve 20 and described spark plug tube 87, and be formed with the clearance groove 88 that is used to avoid with the interference of spark plug tube 87 on the outer surface of joint 61c.
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, be in the position coaxial with the collar 61b of Control Shaft 61, when Control Shaft 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.
In Fig. 9 and Figure 10, among the collar 61b that Control Shaft 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 of the outer wall that is installed on cylinder head 14.That is, on thread spindle 92, be engaged with nut part 93, an end of connecting rod 95 is arranged by pin 94 pivot suspensions on nut part 93, and the other end of this connecting rod 95 is connected with control arm 91 by pin 96,96 by 62 rotations of actuator motor.Therefore, when making 62 work of actuator motor, nut part 93 moves along the thread spindle 92 of rotation, and by the control arm 91 that is connected with nut part 93 through connecting rod 95, Control Shaft 61 is swung around collar 61b, thereby makes movable fulcrum 60 displacements.
On the outer wall of valve mechanism cover 15, be provided with for example such rotation angle sensor 97 of 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 the guide groove 99 of linearly extension alongst, 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 lift changeable mechanism 32, by actuator motor 62 make control arm 91 from position shown in Figure 9 when counter clockwise direction is rotated, the Control Shaft 61 that is connected in control arm 91 is also to counterclockwise rotating, thus movable fulcrum 60 descends.Under this state, during air inlet side valve driving cam 29 press-on roller 50 by 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 adjusting screw 49,49 pushing intake valves 20, intake valve 20 is opened with low lift.
When making control arm 91 turn to solid line position among Fig. 9 by actuator motor 62, the Control Shaft 61 that is connected in control arm 91 rotates to clockwise direction, thereby movable fulcrum 60 rises.Under this state, when passing through air inlet side valve driving cam 29 press-on roller 50 of admission cam shaft 30, described four joint connecting rods deform, and air inlet side rocking arm 31 is swung downwards, the push rod 20a of adjusting screw 49,49 pushing intake valves 20, intake valve 20 open with high lift.
Effect to this embodiment describes below, intake-side camshaft 30 is disposed at such position: along the cylinder-bore axis C of engine main body 11, intake-side camshaft 30 apart from the firing chamber 17 distance greater than the position of exhaust side camshaft 35 distance of 17 apart from the firing chamber, so that intake-side camshaft 30 is in the position higher than exhaust side camshaft 35, therefore, can easily make the flow of lubricant that the lower air inlet side valve device 28 of temperature has been carried out lubricated and cooling to exhaust side valve device 33 sides, thereby can carry out the lubricated and cooling of the exhaust side valve device 33 in the harsh thermal environment efficiently.
In addition, air inlet side valve device 28 has the valve that can make intake valve 20 and opens the lift changeable mechanism 32 that lift amount changes, and exhaust side valve device 33 has exhaust side camshaft 35, and exhaust side rocking arm 36, this exhaust side rocking arm 36 is connected in linkage with exhaust valve 21, and be driven in this exhaust side camshaft 35 and swing, therefore, by utilizing lift changeable mechanism 32 that the lift amount of intake valve 20 is changed, can control air inflow and not need closure, and can effectively lift changeable mechanism 32 be arranged at than exhaust side valve device 33 sides and have in the space of air inlet side valve device 28 sides of surplus.
And, the attitude of engine main body 11 is set for: make its cylinder-bore axis C oblique towards 33 inclinations of exhaust side valve device, therefore can make more efficiently to air inlet side valve device 28 carried out lubricated and cooled flow of lubricant to exhaust side valve device 33 sides, thereby can more efficiently exhaust side valve device 33 be lubricated and cool off.
In addition, the sense of rotation 37 of intake-side camshaft 30 is set for: rotate on a side direction relative with exhaust side valve device 33, thereby the rotation by intake-side camshaft 30 makes lubricating oil splash to exhaust side valve device 33 sides, can more efficiently exhaust side valve device 33 be lubricated by the spittle of the lubricant oil that splashed and cool off.
In addition, be used for making the valve of intake valve 20 open lift amount continually varying lift changeable mechanism 32, one end of first and second link arms 58,59 and being connected with air inlet side rocking arm 31 rotatably, this air inlet side rocking arm 31 has 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 engine main body 11, and the other end of second connecting rod arm 59 is by displaceable movable fulcrum 60 rotatably supports.
Therefore, be shifted continuously, the lift amount of intake valve 20 is infinitely changed by making movable fulcrum 60.And, one end of first and second link arms 58,59 directly is connected with air inlet side rocking arm 31 rotationally, thereby can reduce to dispose the space of two link arms 58,59, can make the valve device miniaturization, and owing to directly be passed to the roller 50 of air inlet side rocking arm 31, so can guarantee good followability with respect to air inlet side valve driving cam 29 from the power of air inlet side valve driving cam 29.And, can with 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, thereby can make air inlet side valve device 28 on the direction of the axis of intake-side camshaft 30, realize miniaturization.
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 can realize that an end of first connecting rod arm 58 is connected and the axle supporting of described roller 50 on air inlet side rocking arm 31 with the rotating of air inlet side rocking arm 31 by the first common coupling shaft 51, thereby can reduce number of components, and make the 28 further miniaturizations of air inlet side valve device.
At air inlet side and exhaust side valve device 28, in the air inlet side valve device 28 in 33 with lift changeable 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, and 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, therefore, even setting the angle α (with reference to Fig. 1) of intake valve 20 and exhaust valve 21 less so that can obtain good burning in order to make the firing chamber miniaturization, also can avoid the maximization of cylinder head 14, and can prevent air inlet side and exhaust side valve device 28,33 mutual interference.
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 supported on engine main body 11 swingably by exhaust side pitman arm shaft 43, and be connected in linkage with exhaust valve 21, so that being driven in exhaust side valve driving cam 35 swings, be disposed at air inlet side and exhaust side valve device 28, spark plug tube 68 between 33 is installed on cylinder head 14, and be inclined to along with moving closer to exhaust side valve device 33 towards the top, therefore spark plug tube 68 and air inlet side and exhaust side valve device 28 can avoided, configuration spark plug tube 68 under the situation of 33 interference helps cylinder head 14 whole further miniaturizations.
In addition, the Control Shaft 61 that the lift changeable mechanism 32 of air inlet side valve device 28 is had, be connected with movable fulcrum 60, and can make movable fulcrum 60 around with the axis generation angular displacement of its parallel axes, and, this Control Shaft 61 in engine main body 11, can improve the supporting rigidity of Control Shaft 61 by dual-supporting at the two-side supporting of air inlet side rocking arm 31, can critically carry out the variable control of lift amount of intake valve 20.
In addition, single described Control Shaft 61 is supported on engine main body 11 and shared by a plurality of cylinders that form a line, and has therefore avoided the increase of number of components, can make motor E miniaturization.
And Control Shaft 61 constitutes crank-like, and comprises: the crankweb 61a, the 61a that are disposed at the both sides of air inlet side rocking arm 31; Collar 61b, 61b, meeting at right angles with the base end part outer surface of two crankweb 61a, 61a is connected, and rotatably support is in engine main body 11; And connecting joint 61c between two crankweb 61a, the 61a, movable fulcrum 60 is connected with Control Shaft 61 in the mode that connects between two crankweb 61a, the 61a, thereby can increase the rigidity of the Control Shaft 61 that is driven the generation angular displacement.
The collar 61b rotatably support of described Control Shaft 61 is between upper support 38 and lower part support 77, this upper support 38 engages with the cylinder head 14 of engine main body 11, lower part support 77 engages with upper support 38 from the below, therefore can improve the assembling performance of Control Shaft 61 on engine main body 11, and owing to the lower part support 77 with cylinder head 14 splits is anchored on upper support 38, the design freedom of the cylinder head 14 in the time of therefore, can improving supporting Control Shaft 61.
In addition, at upper and lower supporting member 38,77, and be incorporated with between the collar 61b can dimidiation roller bearing 79, therefore can reduce the frictional loss of Control Shaft 61 at support, can improve the assembling performance of Control Shaft 61.
In addition, on upper support that is engaged with each other and lower part support 38,77, be formed with side-prominent Control Shaft supporting convex portion 80 to the crankweb 61a of Control Shaft 61, through Control Shaft with the collar 61b rotatably support of supporting convex portion 80 between upper support and lower part support 38,77, therefore can further improve the supporting rigidity of Control Shaft 61.
In addition, upper support 38 and from above the end cap 39 that engages with upper support 38 be formed with towards the outstanding camshaft of air inlet side rocking arm 31 with supporting convex portion 81, intake-side camshaft 30 runs through camshaft uses supporting convex portion 81 and rotatably support between upper support 38 and end cap 39, therefore can be with the restricted number of parts that is used to support intake-side camshaft 30 in minimum degree, and can improve the supporting rigidity of intake-side camshaft 30.
In addition, the connection Control Shaft is given prominence to the rib between the supporting convex portion 81 82 with supporting convex portion 80 and camshaft and is arranged at upper support 38, therefore can further improve the supporting rigidity of Control Shaft 61 and intake-side camshaft 30.
In addition, Control Shaft 61 is configured to: at intake valve 20 and be arranged at and make the outer surface of joint 61c and spark plug tube 87 opposed between the spark plug tube 87 of cylinder head 14, on the outer surface of described joint 61c, be formed with the clearance groove 88 that is used to avoid with the interference of spark plug tube 87, therefore spark plug tube 87 more is configured near air inlet side valve device 28 sides, thereby makes motor E miniaturization.
In the air inlet side rocking arm 31 of air inlet side valve device 28, on the face of the opposition side of itself and valve joint 61a, be formed with the weight saving portion 53,54,54 that replaces each other, thereby can make 31 lightweights of air inlet side rocking arm.
And, when air inlet side rocking arm 31 die 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 opposite directions, therefore weight saving portion 53,54 adjacent one another are; 53,54 inner side surface tilts in the same direction, therefore 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, thereby can keep the rigidity of air inlet side rocking arm 31 by the 31d of wall portion, the 31d of approximate equality thickness.
In addition, air inlet side valve device 28 has the lift amount continually varying lift changeable mechanism 32 that can make intake valve 20, even therefore have number of spare parts more, and become easily in the air inlet side valve device 28 of the lift changeable mechanism 32 that causes air inlet side valve device 28 weight cause of increased, by making 31 lightweights of air inlet side rocking arm, also can make 28 lightweights of air inlet side valve device, can increase limit speed.
More than embodiments of the invention are illustrated, but the invention is not restricted to the foregoing description, can carry out various design alterations in the scope of protection of present invention not breaking away from.
For example in the above-described embodiments, the situation that spark plug tube 87 is disposed between air inlet side and the exhaust side valve device 28,33 is illustrated, but the present invention also is applicable to the motor that disposes to the Fuelinjection nozzle of firing chamber 17 direct fuel injections between air inlet side and exhaust side valve device 28,33.
Claims (5)
1. a motor is equipped with on the cylinder head (14) of a part that constitutes engine main body (11): driven the intake valve (20) that opens and closes by the air inlet side valve device (28) with intake-side camshaft (30); With the exhaust valve (21) that opens and closes by exhaust side valve device (33) driving with exhaust side camshaft (35),
Intake-side camshaft (30) is disposed at such position: along the cylinder-bore axis (C) of engine main body (11), intake-side camshaft (30) apart from the firing chamber distance of (17) greater than the position of exhaust side camshaft (35) distance of (17) apart from the firing chamber, so that intake-side camshaft (30) is in than the high position of exhaust side camshaft (35)
Air inlet side valve device (28) has the lift changeable mechanism (32) that lift amount changes of opening that can make intake valve (20), exhaust side valve device (33) has described exhaust side camshaft (35) and exhaust side rocking arm (36), described exhaust side rocking arm (36) is connected in linkage with exhaust valve (21), and be driven in described exhaust side camshaft (35) and swing, it is characterized in that
Described air inlet side valve device (28) constitutes and comprises: the intake-side camshaft (30) with air inlet side valve driving cam (29); Air inlet side rocking arm (31), its mode with the power of giving the valve-closing direction is connected in linkage with intake valve (20), and has the cam abutting part (50) with described air inlet side valve driving cam (29) butt; And described lift changeable mechanism (32), this lift changeable mechanism (32) comprising: first connecting rod arm (58), the one end is connected with described air inlet side rocking arm (31) rotationally, and a fixed pivot axis (57) rotatably support is passed through in the fixed position of engine main body (11) in its other end; With second connecting rod arm (59), the one end is connected with air inlet side rocking arm (31) rotationally, and its other end is by displaceable movable fulcrum (60) rotatably support.
2. motor according to claim 1 is characterized in that,
Described engine main body (11) so that its cylinder-bore axis (C) be configured to the oblique attitude of described exhaust side valve device (33) inclination.
3. motor according to claim 1 is characterized in that,
The sense of rotation of described intake-side camshaft (30) is set for: with the opposed side direction of described exhaust side valve device (33) on rotate.
4. motor according to claim 1 is characterized in that,
Described a fixed pivot axis (57) and movable fulcrum (60) are disposed at the inboard of the portion that is connected of described air inlet side rocking arm (31) and intake valve (20), and the swinging mounting portion of the exhaust side rocking arm (36) that described 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).
5. motor according to claim 4 is characterized in that,
Spark plug tube (87) is inclined to along with towards the top and approaching with exhaust side valve device (33) gradually, spark plug tube (87) is disposed between described air inlet side valve device (28) and the described exhaust side valve device (33), and is installed on the cylinder head (14).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP023951/2004 | 2004-01-30 | ||
| JP2004023951 | 2004-01-30 | ||
| JP350754/2004 | 2004-12-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1914409A CN1914409A (en) | 2007-02-14 |
| CN100396892C true CN100396892C (en) | 2008-06-25 |
Family
ID=37722605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800033625A Expired - Fee Related CN100396892C (en) | 2004-01-30 | 2005-01-28 | Engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100396892C (en) |
Citations (6)
| 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 |
| JPH0539707A (en) * | 1991-08-02 | 1993-02-19 | Suzuki Motor Corp | Lubricating oil passage of four stroke 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 |
| JPH11107855A (en) * | 1997-09-30 | 1999-04-20 | Suzuki Motor Corp | Cylinder head structure of engine |
| JPH11350923A (en) * | 1998-06-12 | 1999-12-21 | Yamaha Motor Co Ltd | Engine valve train system |
| JP2003343228A (en) * | 2002-05-22 | 2003-12-03 | Toyota Motor Corp | Variable valve train and controller for intake-air volume of internal combustion engine |
-
2005
- 2005-01-28 CN CNB2005800033625A patent/CN100396892C/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| JPH0539707A (en) * | 1991-08-02 | 1993-02-19 | Suzuki Motor Corp | Lubricating oil passage of four stroke 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 |
| JPH11107855A (en) * | 1997-09-30 | 1999-04-20 | Suzuki Motor Corp | Cylinder head structure of engine |
| JPH11350923A (en) * | 1998-06-12 | 1999-12-21 | Yamaha Motor Co Ltd | Engine valve train system |
| JP2003343228A (en) * | 2002-05-22 | 2003-12-03 | Toyota Motor Corp | Variable valve train and controller for intake-air volume of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1914409A (en) | 2007-02-14 |
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