CN102278226B - Cylinder cover structure of internal combustion engine - Google Patents
Cylinder cover structure of internal combustion engine Download PDFInfo
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- CN102278226B CN102278226B CN201110195169.3A CN201110195169A CN102278226B CN 102278226 B CN102278226 B CN 102278226B CN 201110195169 A CN201110195169 A CN 201110195169A CN 102278226 B CN102278226 B CN 102278226B
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- cylinder head
- camshaft
- upper wall
- recess
- abutment wall
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Abstract
A cylinder cover structure of an internal combustion engine achieves lightness while maintaining rigidity and has excellent cooling performances. The cylinder cover comprises a pair of support walls for supporting a camshaft; an upper wall (67) connected with the support walls so as to cover camshaft; four bolt inserting holes (81) formed in a way to surround the camshaft by communicating the camshaft from the upper wall (67) side; and four bolt bosses (80) projecting from the upper wall (67) and provided with the bolt inserting holes (81) so as to make fastening bolts inserted into the bolt inserting holes and fixed on a crankcase. A recess (90) and a projection (91) are formed on the outer side of the upper wall (67). The edges (S1) of the recess (90) and the projection (91) are formed along two diagonal lines (L1, L2) connecting the bolt bosses (80).
Description
Technical field
The present invention relates to a kind of air cylinder head structure that is arranged on the internal-combustion engine on two-wheeled vehicle etc.
Background technique
In being provided with the cylinder head of the motor of horizontal cylinder body (internal-combustion engine), sidewall and the upper wall of cylinder head is integrally formed (for example,, referring to patent documentation 1).
[patent documentation 1] Japanese kokai publication hei 5-15617 communique
Summary of the invention
Require the cylinder head of this internal-combustion engine can make cooling reach well and can improve rigidity again.
The object of the present invention is to provide a kind of air cylinder head structure of internal-combustion engine, this structure, when guaranteeing the rigidity weight reduction of cylinder head, can make the cooling of cylinder head reach good.
As the solution of described problem, the cylinder head (21) of the described internal-combustion engine (17) of the invention that technological scheme 1 is recorded has: a pair of abutment wall (50,51) of supporting camshaft (44); Connect described abutment wall (50,51) to cover the upper wall (67) of described camshaft (44); Four screw jacks (81) that connect and form in the mode around described camshaft (44) from camshaft (44) side described in described upper wall (67) side direction; From described upper wall (67), give prominence to and offer four bolt boss (80) of described screw jack (81), and clamping bolt is fastened on crankcase (19) through described screw jack (81), it is characterized in that, in the outside of described upper wall (67), be formed with recess (90) and protuberance (91), described recess (90) forms along two diagonal (L1, L2) that are connected described bolt boss (80) with the border (S1) of protuberance (91).
The invention that technological scheme 2 is recorded is characterised in that: described recess (90) forms two diagonal (L1 that make two edges connect described bolt boss (80), L2) general triangular, in the outside of described upper wall (67), be formed with a pair of this leg-of-mutton recess (90), so that the summit (P1 of this leg-of-mutton recess (90), P2) across the intersection point (P3) of described diagonal (L1, L2) and face mutually.
The invention that technological scheme 3 is recorded is characterised in that: in the outside of described upper wall (67), be formed with the air cooling radiating fin (92) parallel with the straight line (L3) of described bolt boss (80) that connects adjacency, this air cooling radiating fin (92) is for air cooled engine (17) and be formed in described recess (90).
The invention that technological scheme 4 is recorded is characterised in that: between described camshaft (44) and described upper wall (67), configure intake rocker (41) and exhaust rocker arm (42) and for opening and closing air inlet and exhaust valve (39, 40) SOHC motor (17), in described abutment wall (50, 51) on, be formed with the pitman arm shaft support (84 of supporting air inlet side pitman arm shaft (82) and exhaust side pitman arm shaft (83), 85), described air inlet side pitman arm shaft (82) supports described intake rocker (41) swingably, described exhaust side pitman arm shaft (83) supports described exhaust rocker arm (42) swingably, with around described pitman arm shaft support (84, 85) mode forms described screw jack (81).
The invention that technological scheme 5 is recorded is characterised in that: as a side of described abutment wall (51), compare with this abutment wall (51), be positioned at the fastener hole (65) that is formed with spark plug (66) on the sidewall (62A) that more relies on described crankcase (19) side, making to there is the function for the oil feeding line (96) of oil supply from crankcase (19) with the described screw jack (81) of described fastener hole (65) adjacency.
The invention that technological scheme 6 is recorded is characterised in that: in the described abutment wall (51) of a described side, be formed with oil circuit in cylinder cap (93), in this cylinder cap, oil circuit extends along the straight line (L3) that connects the described bolt boss (80) of adjacency, and its one end is communicated with the described screw jack (81) with described oil feeding line (96) function, and, make its other end to the upper opening that holds the valve valve chamber (94) of described camshaft (44).
The invention that technological scheme 7 is recorded is characterised in that: in the described abutment wall (51) of a described side, be formed with along oil circuit (93) in described cylinder cap and extend and from the recessed sidewall recess (97) of oil circuit (93) side in cylinder cap described in the lateral of this abutment wall (51).
Invention effect
The invention that adopts technological scheme 1 to record, forms the border of recess, protuberance in the mode of connecting bolt boss by the upper wall in cylinder head, thereby without making the upper wall of cylinder head form heavy wall, just can improve the rigidity of cylinder head.Therefore,, when alleviating cylinder head weight, the thin-walled position by the upper wall that formed by recess, can make the cooling of cylinder head reach good.
The invention that adopts technological scheme 2 to record, by forming the recess of a pair of general triangular and making the border of recess and protuberance along the diagonal of bolt boss in the mode that the summit of the recess of general triangular arranges face-to-face, thereby can suppress recess shared ratio in upper wall, and strengthen bolt boss so that the bolt boss at diagonal angle interval each other can not widened, thereby can improve the rigidity of cylinder head.
The invention that adopts technological scheme 3 to record, by air cooling radiating fin, the bolt boss that can not make adjacency interval to each other is just widened and can be strengthened.In addition, can keep outward appearance and can make air cooling radiating fin realize maximizing.
The invention that adopts technological scheme 4 to record, due to have supporting camshaft abutment wall and in the outstanding bolt boss of upper wall, described bolt boss offers the screw jack forming in the mode around pitman arm shaft support, can improve the rigidity between screw jack, therefore, can make the opening/closing time of the valve that opened and closed by intake rocker and exhaust rocker arm reach good.
The invention that adopts technological scheme 5 to record, heat that can cooling spark plug periphery by the oil that flows through in the screw jack with spark plug adjacency, thus can make the cooling of cylinder head reach good.
The invention that adopts technological scheme 6 to record, oil in cylinder cap oil circuit, from valve valve chamber top, drip, thereby can make the lubricated of valve valve chamber reach good.
The invention that adopts technological scheme 7 to record, can make to reach well by the oily thermal diffusivity of oil circuit in cylinder cap, and promotion is supplied to the oily cooling of valve valve chamber.
Accompanying drawing explanation
Fig. 1 is the two-wheeled vehicle left side view that relates to the invention process form.
Fig. 2 is the left side view around of motor of two-wheeled vehicle.
Fig. 3 is the longitudinal sectional view along the engine cylinder cap of the A-A line of Fig. 2.
Fig. 4 is the plan view of cylinder head.
Fig. 5 is the left side view of cylinder head.
Fig. 6 is the right hand view of cylinder head.
Fig. 7 is the sectional view along the B-B line of Fig. 4.
Fig. 8 is the sectional view along the C-C line of Fig. 6.
Fig. 9 is the sectional view along the D-D line of Fig. 4.
Figure 10 is the plan view of cylinder head.
Figure 11 is the sectional view along the E-E line of Fig. 5.
The explanatory drawing that Figure 12 connects for the suction tude when the air inflow regulating device specification that changes two-wheeled vehicle is described, the left side view of two-wheeled vehicle.
[symbol description]
17 internal-combustion engines
19 crankcases
21 cylinder head
41 intake rockers
42 exhaust rocker arms
44 camshafts
50 left side abutment wall (abutment wall)
51 right side abutment wall (abutment wall)
62A sidewall
66 spark plugs
67 upper walls
80 bolt boss
81 screw jacks
82 air inlet side pitman arm shafts
83 exhaust side pitman arm shafts
84,85 pitman arm shaft supports
90 recesses
91 protuberances
92 air cooling radiating fin
Oil circuit in 93 cylinder caps
97 sidewall recesses
S1 border
L1, L2 diagonal
Embodiment
Below, with reference to the accompanying drawings form of implementation of the present invention is described.If do not do special record, below the direction such as all around in explanation is consistent with direction of traffic.In addition, in figure, arrow FR represents vehicle front, and arrow LH represents vehicle left side, and arrow UP represents vehicle top.
Fig. 1 is the left side view with the two-wheeled vehicle 1 of the structure that relates to the invention process form.Two-wheeled vehicle 1 is provided with so-called bending beam type vehicle frame 2, with the pairing left and right front fork 5 of axle supporting front-wheel 4 by deflecting bar 6 can turn to support in place in the head tube 3 of vehicle frame 2 front ends.On the top of deflecting bar 6, steering handle 7 is housed.
A main car frame 8 is tilted to the rear lower side from head tube 3 and extends, and pairing left and right pivot plate 9 extends downwards from the rearward end of this main car frame 8.The vertical intermediate portion that is bearing in swingably pivot plate 9 with the front end of the swing arm 11 of axle supporting wheels 10, the front end of the pairing left and right seat rail 12a in seat frame 12 and pairing left and right support column 12b is connected to respectively the rear portion of main car frame 8 and pivot plate 9.
Between the front and back of seat frame 12 intermediate portion and the rearward end of swing arm 11, be respectively arranged with pairing left and right vibration damper 13, above seat frame 12, be provided with occupant seat 14.The body cover 15 that the vehicle body of two-wheeled vehicle 1 is made by synthetic resin covers.In addition, in figure, symbol 14a represents to be arranged on the trunk of seat 14 lower front, and symbol 16 represents to be arranged on the fuel tank of seat 14 lower rear.
Below the main car frame 8 of vehicle frame 2, the air-cooled single-cylinder engine 17 with the structure that relates to this form of implementation is housed, motor 17 is the state configuration along left and right directions with spin axis (crank axle) C1 of its bent axle 18, and has cylinder block of making 20 from the front end approximate horizontal (being exactly slightly high) of crankcase 19 outstanding basic structure (horizontal cylinder body) forward above.In addition, in figure, symbol C2 represents the axis (cylinder body axis) along the projected direction of cylinder block 20 inner cylinder bodies.
In motor 17, cylinder block 20 is equipped with cylinder head 21 at its front end, and cylinder head 21 is trapezoidal shape from the side, and has the structure that valve mechanism cover and cylinder head are integrated.
One end of suction tude 22 is connected to the upside (air inlet side) of cylinder head 21, and the other end of suction tude 22 is connected to the downstream side of vaporizer 23.One end of connecting tube 24 is connected to the upstream side of vaporizer 23, and the other end of connecting tube 24 is connected to air cleaner box 25.
In addition, one end of outlet pipe 26 is connected to the downside (exhaust side) of cylinder head 21, and outlet pipe 26 extends towards the rear below motor 17, afterwards, its other end is connected to be configured in the silencing apparatus 27 on trailing wheel 10 right sides.In addition, air cleaner box 25 passes through unshowned bearing bracket on the top of main car frame 8.
Referring to Fig. 2, in cylinder block 20, along cylinder-bore axis C2, be formed with cylinder barrel 28, piston 29 is inlaid in this cylinder barrel 28 slidably.Piston 29 is connected with bent axle 18 via connecting rod 30.
The rotating power of bent axle 18 is via the unshowned clutch and the speed changer 31 that is arranged on crankcase 19 interior rear portions that are arranged on crankcase 19 interior right sides, output to the drive sprocket 32 that is configured in crankcase 19 left sides, rear portion, and via chain 33, from this drive sprocket 32, be transferred to the driven sprocket 34 (referring to Fig. 1) in trailing wheel 10 left sides.
In Fig. 2, symbol 35 represents to form the main shaft of speed changer 31, and symbol 36 represents to form the countershaft of speed changer 31.In addition, the top substantial middle of crankcase 19 is by being formed on engine lifting bracket 48 supportings on main car frame 8, and the rear portion of crankcase 19 is by being formed on upper and lower a pair of engagement portion 49 supportings on pivot plate 9.
On the top of cylinder head 21, be formed with the suction port 37 that connects vaporizer 23, in the bottom of cylinder head 21, be formed with the relief opening 38 that connects outlet pipe 26.Each mouthful 37,38 sidewall openings from cylinder head 21, and, the firing chamber 21A opening in cylinder head 21.The cylinder inside opening of each mouthful 37,38 (firing chamber 21A side opening) can pass through respectively suction valve 39, outlet valve 40 opens and closes.Can carry out by intake rocker 41, exhaust rocker arm 42, by single camshaft 44 on-off action of each mouthful 37,38 of being realized by each valve 39,40.
As shown in the longitudinal section of the cylinder head 21 of Fig. 2 A-A line showing along Fig. 3, along left and right directions (parallel with bent axle 18) the configuration camshaft 44 of its spin axis C3, and be configured in firing chamber 21A upside (take cylinder head 21 top side as on while observing).Motor 17 is SOHC motor.
As shown in Figure 3, camshaft 44 is supported with cylinder head 21 shape all-in-one-piece pairing left and right left side abutment wall 50, right side abutment wall 51, and, in left side abutment wall 50, connect the matching hole 53 of the ball bearing 52 of the left end side be provided with rotatably support camshaft 44, in right side abutment wall 51, be equipped with the embedding hole 55 of ball bearing 54 of the right part of rotatably support camshaft 44.
In the left side of left side abutment wall 50, be formed with cam chain chamber 56, the left in cam chain chamber 56 is exposed on outside left side sidewall 70 and is formed with for installing or hold the opening 57 of camshaft 44.Camshaft 44 after opening 57 inserts and passes through the matching hole 53 of left side abutment wall 50, in left and right abutment wall 50,51 via ball bearing 52,54 supportings.In left side abutment wall 50, be formed with bolt fastening hole 50A, and by the fastening plate 50B across left side abutment wall 50 and ball bearing 52 of bolt 50C.The position that thus, can complete camshaft 44 is fixed.
In the left part of camshaft 44, be coaxially fixed with the not shown cam driven sprocket 45 going out that diameter is larger, at this cam driven sprocket 45 be coaxially fixed on the cam driven sprocket 46 (referring to Fig. 2) that the diameter of bent axle 18 left sides is less and be arranged with ring-type cam chain 47.
By sprocket wheel 45,46 and cam chain 47, camshaft 44 connects and drives with bent axle 18, to carry out the switching of each valve 39,40.Camshaft 44 is the solid axis bodies that formed by casting and guarantees sufficient rigidity.In addition, by being fastened on from camshaft 44 left sides with the bolt 45A fixed bearing cam driven sprocket 45 a bolt fastening hole 44A who axially wears.
After camshaft 44 is bearing in cylinder head 21, at the left side wall of cylinder head 21, block 58 is installed with sealing opening 57 (also referring to Fig. 2).Block 58 is formed with the ring junction engaging with opening 57 inner circumference edges and combines harmoniously 59 at its back side, and, after this engaging wall 59 is engaged with opening 57, by screw thread combination, complete installation.In addition, at the outer circumferential side in conjunction with wall 59, be formed with groove 60, in groove 60, be provided with sealed member 61.
In cylinder head 21, left side abutment wall 50 and right side abutment wall 51 are arranged in parallel along the axially spaced-apart certain distance of camshaft 44, and one setting is arranged in the bottom wall portion 62 that is formed with firing chamber 21A.In bottom wall portion 62, be formed with from the air bag 63 of right side depression, it is crooked that the firing chamber 21A side of this air bag 63 forms firing chamber 21A outer rim.
In the bottom wall portion 62 being recessed to form because forming air bag 63, be formed with the spark plug fastener hole 65 being communicated with firing chamber 21A being positioned on the curved side sidewall 62A on right side.In spark plug fastener hole 65, be fastened with spark plug 66, by under motor 17 state loaded on the vehicle, this spark plug 66 makes terminal side point to right front.In addition, in the firing chamber of bottom wall portion 62 21A left side, be formed with the hollow sectors that forms cam chain chamber 56 parts.
The forward end of left side abutment wall 50 and right side abutment wall 51 is connected by the upper wall 67 arranging in covering camshaft 44 modes, herein, although when motor 17 is assembled onboard, described upper wall 67 directed forward, but still take when cylinder head 21 is considered as to monomer is benchmark, is called " upper wall ".In addition, below in the explanation of cylinder head 21, continue to utilize the direction of vehicle that the direction of cylinder head 21 is described.
Fig. 4 is from vehicle front, along cylinder-bore axis C2 direction, observes the plan view of cylinder head 21, and Fig. 5, Fig. 6 are respectively left side view and the right hand views of cylinder head 21.As shown in Fig. 4～Fig. 6, in cylinder head 21, make described left side sidewall 70, left side abutment wall 50 and right side abutment wall 51 and upper wall 67 combinations.The upside sidewall 71 that is positioned at upside while in addition, making to be loaded on vehicle combines with upper wall 67, left side sidewall 70, left side abutment wall 50 and right side abutment wall 51 with the downside sidewall 72 that is positioned at downside.In addition, right side abutment wall 51 doubles as being exposed at the wall portion in outside.
Cylinder head 21 is trapezoidal shape while observing in side as previously mentioned, due to upside sidewall 71 has while observing in side and cylinder-bore axis C2 almost parallel extends planar surface portion 73 with from the front end of planar surface portion 73 towards upper wall 67 and the anterior inclination face 74 extending that reduces, and the planar surface portion 75 that downside sidewall 72 has while observing in side and cylinder-bore axis C2 almost parallel extends and from the front end of planar surface portion 75 towards upper wall 67 and the anterior inclination face 76 that raises and extend, therefore, present this shape.
The handle hole 77,78 using when the face 74,76 that tilts forms respectively suction valve 39, outlet valve 40 assembly operation, these handle holes 77,78 seal with lid when assembly operation completes.
At four jiaos of upper wall 67, be near the region of upper wall 67 and 71 combinations of upside sidewall and near the region of upper wall 67 and 71 combinations of upside sidewall in detail, be formed with four bolt boss 80 outstanding from this upper wall 67 to cylinder-bore axis C2 direction ...
Fig. 7 is the sectional view along the B-B line of Fig. 4, and Fig. 8 is the sectional view along the C-C line of Fig. 6.In bolt boss 80, forming one end connects until the screw jack 81 of cylinder head 21 bottoms to camshaft 44 sides at the front-end face opening of bolt boss 80 and from upper wall 67 ...In addition, screw jack 81 ... around camshaft 44, form, and configure to form the mode of rectangle when connecting between each center.In addition, when observing bolt boss 80 with cylinder-bore axis C2 direction, extending axially in the mode around camshaft 44 of bolt boss 80 configures.
Cylinder head 21, by by the unshowned stud bolt inserting bolt jack 81 extending from crankcase 19 to cylinder-bore axis C2 direction and nut thread is combined in the front-end face of bolt boss 80, is fastened on crankcase 19 with this.
In addition, air inlet side pitman arm shaft support 84 and exhaust side pitman arm shaft support 85 in Fig. 8, have been shown, this air inlet side pitman arm shaft support 84 and exhaust side pitman arm shaft support 85 supporting air inlet side pitman arm shaft 82 and exhaust side pitman arm shafts 83, this air inlet side pitman arm shaft 82 and exhaust side pitman arm shaft 83 support intake rocker 41 and exhaust rocker arm 42 swingably.Air inlet side pitman arm shaft support 84 and exhaust side pitman arm shaft support 85 are the holes axially offered from left side abutment wall 50 along camshaft 44, as shown in Figure 8, the screw jack 81 that this air inlet side pitman arm shaft support 84 and exhaust side pitman arm shaft support 85 are also configured in place, four angles around.
Refer again to Fig. 4, in cylinder head 21, the surface of upper wall 67 (outside) is formed with a pair of recess 90 and set a pair of protuberance 91 higher than the face of this recess 90.Fig. 9 has shown along the part section of the upper wall 67 of the D-D line of Fig. 4.As shown in the drawing, the bottom surface of protuberance 91 is set as higher than recess 90.
The border S1 of recess 90 and protuberance 91 forms along two diagonal L 1, the L2 of connecting bolt boss 80, in detail, recess 90 so that two diagonal L 1 of two edge connecting bolt boss 80, the general triangular of L2 form, along summit P1, the P2 on two limits of diagonal L 1, L2 across the intersection point P3 of diagonal L 1, L2 and face-to-face and on upper wall 67, form a pair of.Therefore, protuberance 91 forms between the bolt boss 80 that connects along continuous straight runs and vertical direction arrangement, thereby has strengthened bolt boss 80.
In addition, at the upper wall 67 of cylinder head 21, form a plurality of with connect the parallel air cooling radiating fin 92 along the straight line L3 of the bolt boss 80 of the adjacent arrangement of vertical direction, described air cooling radiating fin 92 forms with recess 90, protuberance 91 and is connected.In addition, in the appropriate position of each sidewall of cylinder head 21, be also formed with air cooling radiating fin.
In addition, in Fig. 4, in the right side abutment wall 51 with spark plug 66 (spark plug fastener hole 65) adjacency, be formed with oil circuit 93 in the cylinder cap extending along the straight line L3 that connects the bolt boss 80 of the adjacent arrangement of Vertical direction.Referring to Fig. 8, in cylinder cap, one end of oil circuit 93 is communicated with the screw jack 81 that is formed on downside (relief opening 38 sides) in right side abutment wall 51, and, oriented cylinder head 21 inside bend of the other end band at the connection oil circuit 95 that holds valve valve chamber 94 upper openings of camshaft 44.Referring to Fig. 3, valve valve chamber 94 refers to the space being formed by bottom wall portion 62, left side abutment wall 50, right side abutment wall 51 and upper wall 67.
Herein, the screw jack 81 that in cylinder cap, oil circuit 93 is communicated with has from the function of the oil feeding line 96 of crankcase 19 fuel feeding, the oil that in from this oil feeding line 96 to cylinder cap, oil circuit 93 provides (lubricated with) is supplied to valve valve chamber 94 from connection oil circuit 95, to camshaft 44 grades are lubricated.In addition, referring to Fig. 6, Fig. 8, in right side abutment wall 51, be formed with and along oil circuit in cylinder cap 93, extend and from the sidewall recess 97 of oil circuit 93 sides depressions in the lateral cylinder cap of right side abutment wall 51.
, referring to Figure 10, it has shown the upside sidewall 71 of cylinder head 21, and the suction tude 22 of extending to cylinder head 21 sides from vaporizer 23 downstream sides shown in Fig. 2 is connected with the suction port 37 of planar surface portion 73 openings from upside sidewall 71.In the end of suction tude 22, be formed with the discoideus flange along external diameter Directional Extension, on this flange, be formed with pair of bolts jack (not shown), this is to form in relative mode on the straight line by suction tude 22 centers (open centre) to screw jack.Below, the linkage structure of suction tude 22 and suction port 37 is described.
The surrounding of the inlet side opening 100 of suction port 37 form from planar surface portion 73 protuberances arrange and with the seat surface portion 101 of the circular of the end face butt of suction tude 22, in addition, the surrounding at inlet side opening 100 is formed with: form continuously a plane with seat surface portion 101 and a pair of the 1st boss part 102 of relative configuration across center C 4 and roughly with the 1st straight line L4 of the center C 4 along by suction port 37.
The 1st boss part 102 forms from planar surface portion 73 protuberance, and, be positioned to the external diameter direction of seat surface portion 101 and give prominence to.In the 1st boss part 102, be formed with respectively bolt fastening hole 103, the front-end face of the 1st boss part 102 becomes the seat surface of the screw jack of the flange that is formed at suction tude 22, by the bolt 120 (Fig. 2) that inserts this screw jack is fastened on to bolt fastening hole 103, and connect suction tude 22.
Herein, straight line L5 represents vertical with cylinder-bore axis C2 and extends the straight line of (extending along general horizontal direction while being loaded on vehicle) with planar surface portion 73 almost parallels of upside sidewall 71.The 1st straight line L4 extends with respect to the straight line L5 several angle that tilts clockwise, and in detail, the 1st boss part 102 is formed on the 1st straight line L4.
And, herein, in cylinder head 21, surrounding at suction port 37 inlet side openings 100 is formed with the 2nd boss part 104, the formation interval of the 2nd boss part and form position different from the 1st boss part 102 (also referring to Fig. 5, Figure 11), the 2nd boss part 104 is roughly configured in relatively across center C 4 intersects with the 1st straight line L4 and passes through on the 2nd straight line L6 of center C 4 of suction port 37.
The 2nd boss part 104 is the same as with the 1st boss part 102 planar surface portion 73 protuberance, and, be positioned at the external diameter direction of seat surface portion 101, on the other hand, between present face 101 and the 2nd boss part 104, form groove 105 (Figure 10) and separated.Connect between the 2nd boss part 104 and the 2nd straight line L6 of the center C 4 by suction port 37 extends with respect to the straight line L5 several angle that tilts counterclockwise, although the angle θ 1 that the 1st straight line L4 and the 2nd straight line L6 form is 40 ° in this form of implementation, but, preferably below 45 °.In addition, just as indicated in the figure, the distance in figure between the 2nd boss part 104 is set as than the distance between the 1st boss part 102.
The 2nd boss part 104 is to be used to form for the heavy section of the bolt fastening hole of fastening air inlet pipe is set, although in this form of implementation, do not form fastener hole,, also can form as shown in figure 10 bolt fastening hole 106.In this form of implementation, although motor 17 is the device of vaporizer specification,, in specification, be the in the situation that of using fuel injection system (oil sprayer), be design the 2nd boss part 104 in order to form bolt fastening hole 106.
In detail, at Figure 12, shown the two-wheeled vehicle 111 that oil sprayer 110 is housed.This two-wheeled vehicle 111 has only replaced the air inflow regulating device of two-wheeled vehicle 1 with oil sprayer 110, vaporizer 23, and other structure is constant.Comparison diagram 2 and Figure 12 discovery, the suction tude 22 of two-wheeled vehicle 1 is different from suction tude 112 shapes of two-wheeled vehicle 111.In this case, as long as form bolt fastening hole 106 and fastening by bolt 121 and the 2nd boss part 104, just without the basic structure that changes cylinder head 21, and can be installed into tracheae 112.
In addition, referring to Fig. 5, Figure 10, Figure 11, the cylinder-bore axis C2 of suction port 37 of take is benchmark, in the 1st boss part 102 in left side with it between the 2nd boss part 104 of adjacency, forms the tubule support 113 that connects the 1st boss part 102 and the 2nd boss part 104.
Tubule support 113 is from the sidepiece of perimembranous and the 1st boss part 102 of seat surface portion 101, along vertical with cylinder-bore axis C2 and to extend the straight line L5 of (while being loaded on vehicle, roughly along continuous straight runs extends) outstanding with planar surface portion 73 almost parallels of upside sidewall 71, make its part and the 2nd boss part 104 in conjunction with upper.In tubule support 113, along straight line L5, be formed with for supporting the aperture 115 of the tubule 114 being communicated with suction port 37, tubule 114 is supported along straight line L5.That is, tubule 114 is with straight line L5 almost parallel perpendicular to cylinder-bore axis C2 and along planar surface portion 73 configurations that form the upside sidewall 71 of the 1st boss part 102 and the 2nd boss part 104.
Tubule 114 is isolated cylinder head 21 with end and is connected in the connecting hose 116 being connected with the fuel tank 16 that forms carburetion system.In carburetion system, contain valve body, by suitably opening and closing this valve body, make earth pressure release in fuel tank 16 to suction port 37.
In the form of implementation of recording, by the upper wall 67 in cylinder head 1, in the mode of connecting bolt boss 80, form the border S1 of recess 90, protuberance 91 in the above, thereby without making the upper wall 67 of cylinder head 21 form heavy wall, just can improve the rigidity of cylinder head 21.Therefore, can alleviate the weight of cylinder head 21, and the thin-walled position by the upper wall 67 that formed by recess 90, can make the cooling of cylinder head 21 reach good.In addition, by making the border of recess 90 and protuberance 91 along the diagonal L 1 of bolt boss 80, L2, can make outward appearance reach good.
In addition, by forming the recess 90 of a pair of general triangular and with the summit P1 of the recess 90 of general triangular, the mode that P2 is relative makes the border S1 of recess 90 and protuberance 91 along the diagonal L 1 of bolt boss 80, L2, thereby can suppress recess 90 shared ratio in upper wall 67, and so that the mode that the bolt boss 80 at diagonal angle interval to each other can not be widened strengthens bolt boss 80, thereby can improve the rigidity of cylinder head 21.
In addition, due on upper wall 67, be formed with the air cooling radiating fin 92 parallel with the straight line (L3) of bolt boss 80 that connects adjacency, and, at least make this air cooling radiating fin 92 be formed in recess 90, therefore,, by air cooling radiating fin 92, the bolt boss 80 that can not make adjacency interval to each other is just widened and can be strengthened.In addition, can keep outward appearance and air cooling radiating fin 92 is realized maximizing.
In addition, in described left side abutment wall 50, be formed with the pitman arm shaft support 84 of supporting air inlet side pitman arm shaft 82 and exhaust side pitman arm shaft 83,85, described air inlet side pitman arm shaft 82 supports intake rocker 41 swingably, exhaust side pitman arm shaft 83 supports exhaust rocker arm 42 swingably, and form screw jack 81 in the mode around pitman arm shaft support 84,85.
Like this, by the abutment wall of supporting camshaft 44 and in the outstanding bolt boss 80 of upper wall 67, can improve the rigidity between screw jack 81, described bolt boss offers with around pitman arm shaft support 84, the screw jack 81 that 85 mode forms, thereby can make the opening/closing time of the valve 39,40 that opened and closed by intake rocker 41 and exhaust rocker arm 42 reach good.
In addition, by making to there is the function for the oil feeding line 96 of oil supply from crankcase 19 with the screw jack 81 of spark plug 66 adjacency, the oil flowing through in the screw jack 81 with spark plug 66 adjacency can cooling spark plug 55 peripheries heat, thereby can make the cooling of cylinder head 21 reach good.In addition, form oil circuit 93 in cylinder cap, in this cylinder cap, oil circuit 93 makes its one end be communicated with screw jack 81, and, make the other end to the upper opening of valve valve chamber 94.Like this, oil oil circuit 93 in cylinder cap, drips from valve valve chamber 94 tops, to can make the lubricated of valve valve chamber 94 reach good.
In addition, in forming cylinder cap, in the right side abutment wall 51 of oil circuit 93, be formed with along oil circuit in cylinder cap 93 and extend and from the recessed sidewall recess 97 of oil circuit 93 sides in the lateral cylinder cap of this abutment wall 51.Like this, can make to reach well by the oily thermal diffusivity of oil circuit in cylinder cap 93, and can promote to be supplied to the oily cooling of valve valve chamber 94.
Claims (6)
1. an air cylinder head structure for internal-combustion engine, the cylinder head (21) of described internal-combustion engine (17) has: a pair of abutment wall (50,51) of supporting camshaft (44); Connect described abutment wall (50,51) to cover the upper wall (67) of described camshaft (44); Four screw jacks (81) that connect and form in the mode around described camshaft (44) from camshaft (44) side described in described upper wall (67) side direction; From described upper wall (67), give prominence to and offer four bolt boss (80) of described screw jack (81), and clamping bolt is fastened on crankcase (19) through described screw jack (81), it is characterized in that, in the outside of described upper wall (67), be formed with recess (90) and protuberance (91), described recess (90) is connected two diagonal (L1 of described bolt boss (80) with the edge, border (S1) of protuberance (91), L2) form
Described recess (90) forms two diagonal (L1 that make two edges connect described bolt boss (80), L2) general triangular, on the outside of described upper wall (67), be formed with a pair of this leg-of-mutton recess (90), so that the summit (P1 of this leg-of-mutton recess (90), P2) across the intersection point (P3) of described diagonal (L1, L2) and face mutually.
2. the air cylinder head structure of internal-combustion engine according to claim 1, it is characterized in that: the outside in described upper wall (67), be formed with the air cooling radiating fin (92) parallel with the straight line (L3) of described bolt boss (80) that connects adjacency, this air cooling radiating fin (92) is for air cooled engine (17), and is formed in described recess (90).
3. according to the air cylinder head structure of the internal-combustion engine described in any one in claim 1～2, it is characterized in that: between described camshaft (44) and described upper wall (67), configure intake rocker (41) and exhaust rocker arm (42) and for opening and closing air inlet and exhaust valve (39, 40) SOHC motor (17), in described abutment wall (50, 51) on, be formed with the pitman arm shaft support (84 of supporting air inlet side pitman arm shaft (82) and exhaust side pitman arm shaft (83), 85), described air inlet side pitman arm shaft (82) supports described intake rocker (41) swingably, exhaust side pitman arm shaft (83) supports described exhaust rocker arm (42) swingably, with around described pitman arm shaft support (84, 85) mode forms described screw jack (81).
4. the air cylinder head structure of internal-combustion engine according to claim 1 and 2, it is characterized in that: in a side of described abutment wall (51), compare with this abutment wall (51), being positioned at the sidewall (62A) that more relies on described crankcase (19) side and being formed with the fastener hole (65) of spark plug (66), make to there is the function for the oil feeding line (96) of oil supply from crankcase (19) with the described screw jack (81) of described fastener hole (65) adjacency.
5. the air cylinder head structure of internal-combustion engine according to claim 4, it is characterized in that: in the described abutment wall (51) of a described side, be formed with oil circuit in cylinder cap (93), in this cylinder cap, oil circuit extends and its one end is communicated with the described screw jack (81) with described oil feeding line (96) function along the straight line (L3) that connects the described bolt boss (80) of adjacency, and, make its other end to the upper opening that holds the valve valve chamber (94) of described camshaft (44).
6. the air cylinder head structure of internal-combustion engine according to claim 5, is characterized in that: in the described abutment wall (51) of a described side, be formed with along oil circuit (93) in described cylinder cap and extend and from the recessed sidewall recess (97) of oil circuit (93) side in cylinder cap described in the lateral of this abutment wall (51).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-134260 | 2010-06-11 | ||
| JP2010134260A JP5415363B2 (en) | 2010-06-11 | 2010-06-11 | Cylinder head structure of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102278226A CN102278226A (en) | 2011-12-14 |
| CN102278226B true CN102278226B (en) | 2014-08-13 |
Family
ID=45103890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110195169.3A Active CN102278226B (en) | 2010-06-11 | 2011-06-09 | Cylinder cover structure of internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5415363B2 (en) |
| CN (1) | CN102278226B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9194278B2 (en) * | 2013-03-15 | 2015-11-24 | Polaris Industries Inc. | Engine |
| JP7322514B2 (en) * | 2019-05-28 | 2023-08-08 | マツダ株式会社 | cylinder head |
| CN111173643B (en) * | 2019-12-31 | 2021-03-16 | 潍柴动力股份有限公司 | Cylinder head cover and engine with same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5918183Y2 (en) * | 1979-07-30 | 1984-05-26 | 日産デイ−ゼル工業株式会社 | Noise prevention wall material for structures |
| JPS5949748U (en) * | 1982-09-28 | 1984-04-02 | 本田技研工業株式会社 | Cylinder head cooling system |
| JPS6117162U (en) * | 1984-07-04 | 1986-01-31 | マツダ株式会社 | Cylinder head structure of DOHC engine |
| JPS61202603U (en) * | 1985-06-10 | 1986-12-19 | ||
| JPH0495643U (en) * | 1991-01-16 | 1992-08-19 | ||
| JPH09195845A (en) * | 1996-01-12 | 1997-07-29 | Honda Motor Co Ltd | Reciprocating internal combustion engine |
| JP3333375B2 (en) * | 1996-01-29 | 2002-10-15 | ヤマハ発動機株式会社 | Mold for cylinder body of engine |
| JP4265764B2 (en) * | 2002-09-24 | 2009-05-20 | 本田技研工業株式会社 | Air-cooled internal combustion engine |
-
2010
- 2010-06-11 JP JP2010134260A patent/JP5415363B2/en not_active Expired - Fee Related
-
2011
- 2011-06-09 CN CN201110195169.3A patent/CN102278226B/en active Active
Non-Patent Citations (5)
| Title |
|---|
| JP实开平4-95643U 1992.08.19 |
| JP昭59-49748U 1984.04.02 |
| JP昭61-202603U 1986.12.19 |
| JP特开2004-138053A 2004.05.13 |
| JP特开平9-195845A 1997.07.29 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102278226A (en) | 2011-12-14 |
| JP2011256836A (en) | 2011-12-22 |
| JP5415363B2 (en) | 2014-02-12 |
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