WO2006137379A1 - エンジンの動弁装置 - Google Patents
エンジンの動弁装置 Download PDFInfo
- Publication number
- WO2006137379A1 WO2006137379A1 PCT/JP2006/312286 JP2006312286W WO2006137379A1 WO 2006137379 A1 WO2006137379 A1 WO 2006137379A1 JP 2006312286 W JP2006312286 W JP 2006312286W WO 2006137379 A1 WO2006137379 A1 WO 2006137379A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- cylinder head
- camshaft
- engine
- bearing
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/024—Belt drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/20—SOHC [Single overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20882—Rocker arms
Definitions
- the present invention supports a camshaft via a bearing on a cylinder head provided with an intake valve and an exhaust valve, and a camshaft and an intake valve on a rocker shaft supported by the cylinder head in parallel with the camshaft.
- the present invention relates to an improvement in the valve operating system of an engine, which is provided with an intake rocker arm and an exhaust port arm that are connected to each other with an exhaust valve.
- Patent Document 1 As disclosed in Patent Document 1, a valve operating device for an engine with a high power is already known.
- Patent Document 1 Japanese Patent Application Laid-Open No. 1-222883
- the present invention has been made in view of powerful circumstances.
- the means for restricting the movement of the camshaft and the rocker shaft in the thrust direction is made common to reduce the number of parts and simplify the structure. It is another object of the present invention to provide a compact valve operating apparatus for the engine. Means for solving the problem
- the present invention provides a rocker that is supported by a cylinder head in parallel with the cam shaft by supporting the cam shaft via a bearing on a cylinder head provided with an intake valve and an exhaust valve.
- a valve operating device for an engine in which an intake cam and exhaust valve arm connected to each of the camshaft and the intake and exhaust valves are attached to the shaft, the cylinder head is in contact with the end of the rocker shaft.
- the fixing member that restricts the movement in the thrust direction is fixed to contact, and the fixing member that contacts the one side surface of the bearing and restricts the movement in the thrust direction is formed integrally with the fixing member. It is characterized by.
- the present invention is configured such that the fixing member is screwed to the cylinder head.
- the second feature is that it is composed of a fixing bolt and the above-mentioned holding part is composed of a flange seat formed on the head of this fixing bolt.
- the present invention is such that one end portion of the rocker shaft is formed by a bag-like first support hole formed in the cylinder head, and the other end portion is formed by the cylinder head.
- a third feature is that each is supported by a through hole-like second support hole, and a fixing bolt is screwed to the outer end of the second support hole.
- one end of the camshaft is supported by a bag-like bearing hole formed in the cylinder head, and the other end is interposed via the bearing.
- the fourth feature is that it is supported by the cylinder head and the flange seat is brought into contact with the outer surface of the bearing.
- the single fixing member is involved in the movement restriction in the thrust direction of both the rocker shaft and the cam shaft, the number of parts of the valve operating device can be reduced and the structure It can be simplified and contribute to its compactness.
- the movement of the rocker shaft in the thrust direction can be easily and reliably prevented by the bag-like first support hole and the fixing bolt of the cylinder head.
- the movement of the cam shaft in the thrust direction can be easily and surely prevented by the bag-shaped bearing hole of the cylinder head and the flange seat of the fixing bolt.
- FIG. 1 is a longitudinal plan view of a general-purpose four-cycle engine according to the present invention. (First example)
- FIG. 2 is a sectional view taken along line 2-2 of FIG. (First example)
- FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. (First example)
- FIG. 4 is an enlarged view of the periphery of the crankshaft in FIG. (First example)
- FIG. 5 is a view taken in the direction of arrow 5 in FIG. (First example)
- FIG. 6 is a sectional view taken along line 6-6 of FIG. (First example)
- FIG. 7 is a sectional view taken along line 7-7 of FIG. (First example)
- FIG. 8 is a sectional view taken along line 8-8 in FIG. (First example)
- FIG. 9 is a cross-sectional view taken along line 9 9 in FIG. (First example)
- FIG. 10 is a view taken in the direction of arrow 10 in FIG. (First example)
- Fig. 11 is a diagram corresponding to Fig. 10 with the driven pulley removed. (First example)
- FIG. 12 is a diagram for explaining how to attach the driven pulley to the camshaft. (First embodiment) Explanation of symbols
- Example 1 [0016] First, in FIGS. 1 to 4, the engine body 1 of the general-purpose four-cycle engine E is integrally connected to the crankcase 2 having a mounting seat 2a at the lower portion and the crankcase 2 and is inclined upward.
- a cylinder block 3 having a cylinder bore 3a and a cylinder head 5 joined to the upper end surface of the cylinder block 3 via a gasket 4 are constituent elements.
- the crankcase 2 is open on one side, and the opening surface force is also on the inner wall on the inner side, and there are a plurality of steps 8, 8,.
- the bearing bracket 10 is fixed to these stepped parts 8, 8 ... by a plurality of bolts 11, 11 ....
- the bearing bracket 10 and the other side wall of the crankcase 2 support the opposite ends of the crankshaft 12 in a horizontal position via bearings 13 and 13 '. Further, the force at both ends of the balancer shaft 14 arranged adjacent to and parallel to the crankshaft 12 is also supported by the bearing bracket 10 and the other side wall of the crankcase 2 via bearings 15 and 15.
- a continuous reinforcing rib 16 is formed on the outer peripheral surface of the crankcase 2 so as to surround the plurality of stepped portions 8, 8, and so on.
- the end of the rib 16 is integrally connected to the outer wall of the cylinder block 3 integrated with the crankcase 2.
- the reinforcing rib 16 connects the plurality of step portions 8, 8 ... on the outer peripheral surface of the crankcase 2 to each other.
- the support rigidity of the supported bearing bracket 10 and thus the support rigidity of the crankshaft 12 by the bearing bracket 10 can be effectively strengthened.
- the crankcase 2 can be made thinner and lighter. it can.
- the reinforcing function of the reinforcing rib 16 is enhanced, and the support rigidity of the bearing bracket 10 can be further enhanced.
- a side cover 17 that closes an open surface on one side is joined to the crankcase 2 by a plurality of bolts 24, 24,.
- One end of the crankshaft 12 protrudes outward as an output shaft through the side cover 17, and an oil seal 18 closely attached to the outer peripheral surface of the output shaft is attached to the side cover 17.
- the other end portion of the crankshaft 12 penetrates the other side wall of the crankcase 2, and an oil seal 19 that is in close contact with the other end portion of the crankshaft 12 is provided on the outer side of the bearing 13 ⁇ . Is attached to the other side wall of the crankcase 2 adjacent to.
- a flywheel 21 that also serves as a rotor of the generator 20 is fixed to the other end of the crankshaft 12, and a cooling fan 22 is attached to the outer surface of the flywheel 21. Further, a recoil type starter 23 supported by the crankcase 2 is placed at the other end of the crankshaft 12.
- the crankshaft 12 is connected via a piston 25 force S connecting rod 26 fitted to the cylinder bore 3a.
- the cylinder head 5 is formed with a combustion chamber 27 connected to the cylinder bore 3a, and an intake port 28i and an exhaust port 28e that open to the combustion chamber 27.
- the combustion chamber 27 of the intake and exhaust ports 28i and 28e An intake valve 29i and an exhaust valve 29e are attached to open and close the open ends.
- the intake and exhaust valves 29i and 29e are respectively provided with valve springs 30i and 30e for urging them in the closing direction.
- the intake and exhaust valves 29i and 29e are driven to open and close by a valve gear 35 that cooperates with the valve springs 30i and 30e.
- valve gear 35 will be described with reference to FIGS. 3, 4, and 6 to 12.
- the valve operating device 35 includes a camshaft 36 that is supported by the cylinder head 5 in parallel with the crankshaft 12 and includes an intake cam 36i and an exhaust cam 36e, and a crankshaft 12 And the timing transmission 37 that connects the camshaft 36, the intake rocker arm 38i that links the intake cam 36i and the intake valve 29i, and the exhaust rocker arm 38e that links the exhaust cam 36e and the exhaust valve 29e.
- the camshaft 36 includes a bag-shaped bearing hole 39 formed in one side wall 5a of the cylinder head 5 and a ball bearing 41 fitted in the bearing mounting hole 40 of the partition wall 5b in the middle of the cylinder head 5. Both ends are supported. Further, a common single stopper shaft 42 for swinging the intake and exhaust outlet arm 38i, 38e is provided in the first and second support holes 43 'formed in the one side wall 5a and the partition wall 5b, respectively. , 43 support both ends.
- the first support hole 43 ′ of the one side wall 5 a has a bag shape, and the second support hole 43 of the partition wall 5 b has a through hole shape.
- the outer end of the stopper shaft 42 is formed at the outer end of the second support hole 43.
- a fixing bolt 44 for abutting the tip thereof is screwed to the partition wall 5b. Therefore, the stopper shaft 42 is moved in the thrust direction by the bag-like first support hole 43 ⁇ and the fixing bolt 44. Being blocked is a bit different.
- the fixing bolt 44 is integrally provided with a relatively large-diameter flange seat 44a in contact with the outer end surface of the outer race 41a of the ball bearing 41 that supports the camshaft 36 on the head.
- the timing transmission device 37 includes a toothed drive pulley 45 fixed to the crankshaft 12 and a toothed drive pulley 45 fixed to the camshaft 36, the number of teeth of which is twice that of the drive pulley 45. 46 and an endless timing belt 47 wound around these driving and driven pulleys 45 and 46.
- the rotation of the crankshaft 12 is decelerated to 1 Z2 by the timing transmission device 37 and transmitted to the camshaft 36.
- the intake and exhaust cams 36i, 36e force intake and exhaust outlet cover arms 38i, 38e are swung against the urging forces of the valve springs 30i, 30e, respectively.
- Each 29e can be opened and closed.
- This timing transmission 37 includes a lower chamber 48a defined between the bearing bracket 10 and the side cover 17, an intermediate chamber 48b formed in the cylinder block 3 on one side of the cylinder bore 3a, and a cylinder head 5 It is accommodated in a timing transmission chamber 48 formed by sequentially connecting an upper chamber 48c formed on one side. That is, the driving pulley 45 is disposed in the lower chamber 48a, the driven pulley 46 is disposed in the upper chamber 48c, and the timing belt 47 is disposed so as to pass through the intermediate chamber 48b.
- the engine E can be made compact.
- the cylinder head 5 is formed with a valve chamber 49 having an open upper surface between the one side wall 5a and the partition wall 5b, and the intake and exhaust cams 36i of the cam shaft 36 are formed in the valve chamber 49. , 36e, intake And exhaust outlet arm 38i, 38e and the like are accommodated.
- the open upper surface of the valve operating chamber 49 is closed by a head cover 52 joined to the cylinder head 5 with bolts 53.
- the upper chamber 48c and the valve operating chamber 49 of the timing transmission chamber 48 are connected to an oil passage hole 75 provided in the partition wall 5b.
- the outer end surface 5c of the cylinder head 5 is provided with a working window 55 that opens the upper chamber 48c so that the outer surface of the driven pulley 46 faces, and the driven pulley is passed through the working window 55.
- 46 is inserted into the timing belt 47, and the driven pulley 46 is attached to the camshaft 36.
- a lid body 57 for closing the work window 55 is joined to the outer end surface 5c by a plurality of bolts 58 via a seal member 56.
- the outer end surface 5c of the cylinder head 5 to which the lid 57 is joined has at least a part of the outer periphery of the driven pulley 46 on the side opposite to the drive pulley 45.
- the inclined surface 5c is preferably inclined so as to be exposed from the working window 55 over a half circumference opposite to the driving pulley 45 of the driven pulley 46.
- the driven pulley 46 includes a bottomed cylindrical hub 46a, a web 46b extending in a radial direction from the hub 46a, and a toothed rim formed on the outer periphery of the web 46b.
- the hub 46a is fitted to the outer periphery of the outer end of the camshaft 36 protruding toward the upper chamber 48c.
- the end wall of the hub 46a is provided with a bolt hole 60 that occupies a position where the central force is also eccentric, and a positioning groove 61 that extends from one side of the bolt hole 60 to the opposite side to the eccentric direction.
- a first mark 62a is engraved on the outer surface of the rim 46c, and a second mark 62b corresponding to the first mark 62a is engraved on the outer end surface 5c of the cylinder head 5.
- the web 46b is provided with a plurality of through holes 64, 64 penetrating therethrough.
- a screw hole 66 corresponding to the bolt hole 60 and a positioning pin 67 corresponding to the positioning groove 61 are provided at the outer end of the cam shaft 36. It is done.
- crankshaft 12 is at a predetermined rotation position corresponding to a specific position (eg, top dead center) of the piston 25, and the camshaft 36 is at a predetermined phase relationship position with respect to the crankshaft 12.
- the first and second marks 62a and 62b, bolt hole 60 and screw hole 66, positioning groove 61 and The positioning pins 67 are aligned with each other on a straight line L passing through the centers of both axes 12, 36.
- the crankshaft 12 is fixed at a rotational position corresponding to the specific position of the piston 25.
- the timing belt 47 that is already hung on the drive pulley 45 while the first pulley 62a of the rim 46c is aligned with the second drum 62b of the cylinder head 5 is aligned. Insert inside.
- the positioning pin 67 of the camshaft 36 is received in the bolt hole 60 of the driven pulley 46, and the driven pulley 46 is guided so as to guide the positioning pin 67 to the positioning groove 61.
- the positioning pin 67 received in the bolt hole 60 is guided to the positioning groove 61, thereby performing the first and second alignment on the straight line L passing through the centers of the crankshaft 12 and the camshaft 36.
- the marks 62a and 62b, the bolt hole 60 and the screw hole 66, the positioning groove 61 and the positioning pin 67 are arranged all at once. By visually observing this state, it can be easily confirmed that the crankshaft 12 and the camshaft 36 are in a predetermined phase relationship.
- the hub 46 a is fixed to the camshaft 36 by passing the mounting bolt 68 through the bolt hole 60 and screwing it into the screw hole 66 and tightening.
- the timing transmission 37 is attached to the crankshaft 12 and the camshaft 36 that are previously mounted on the crankcase 2 and the cylinder head 5 in the predetermined phase relationship.
- the screw hole 66 and the positioning pin 67 are formed on the narrow end wall of the hub 46a of the driven pulley 46 because the central force of the camshaft 36 is also arranged at a position eccentric to each other in the opposite direction. A sufficient amount of eccentricity can be imparted to each of the bolt hole 60 and the positioning groove 61, whereby the positioning effect of the positioning groove 61 on the positioning pin 67 and the torque capacity of the mounting bolt 68 can be increased.
- the outer end surface of the cylinder head 5 in which the work window 55 opens becomes the inclined surface 5c! /, So that a part of the outer periphery of the driven pulley 46 is exposed from the work window 55. Therefore, a part of the driven pulley 46 exposed outside the work window 55 can be easily grasped with a tool or the like without being obstructed by the cylinder head 5, and the cam of the driven pulley 46 is thereby It can be easily attached to the shaft 36 and can be easily removed. Therefore, it can contribute to the improvement of assembly and maintenance.
- the outer end surface 5c of the cylinder head 5, that is, the side wall 73 of the lid 57 joined to the inclined surface 5c is formed so as to be inclined along the inclined surface 5c.
- the head of the engine body 1 is shaped so that its lateral width narrows toward the tip side, and the engine E can be made compact.
- the cylinder head 5 is formed with a pair of projecting portions 70 and 70 projecting outward from the work window 55 below the work window 55.
- the portions 70 and 70 are overlapped on the upper end surface of the cylinder block 3 outside the intermediate chamber 48b through the gasket 4 and fastened to the cylinder block 3 by auxiliary connecting bolts 7 and 7.
- the surface of the cylinder block 3 and the cylinder head 5 with respect to the gasket 4 is located outside the intermediate chamber 48b accommodating the timing belt 47!
- the pressure can be increased sufficiently.
- the presence of the inclined surface 5c above the auxiliary connecting bolts 7 and 7 ensures a sufficient space for receiving the tool for operating the auxiliary connecting bolts 7 and 7. Can be easily performed. This also means that the amount of overhanging of the projecting portions 70, 70 to the outside of the work window 55 can be reduced, which also contributes to the compactness of the engine E.
- auxiliary connecting bolts 7 and 7 The operation of the auxiliary connecting bolts 7 and 7 is performed before the lid 57 is attached.
- the lower chamber 48a of the timing transmission chamber 48 passes through a plurality of step portions 8, 8 ... of the inner wall of the crankcase 2 that supports the bearing bracket 10.
- the crankcase 2 communicates with the inside of the crankcase 9, that is, with the crankcase 9, and a common amount of lubricating oil 71 is stored in the crankcase 9 and the lower chamber 48a.
- an impeller-type oil slinger 72 driven from the crankshaft 12 through gears 74, 74 ' is partly partly stored in the lower chamber 48a. It is arranged so as to be immersed in.
- the oil slinger 72 causes the oil 71 to scatter to the surroundings by its rotation.
- the oil guiding wall 73 forces the oil slinger 72 and the drive pulley 45 side to guide the scattered oil to the timing belt 47 side.
- the timing belt 47 is integrally formed on the outer surface of the bearing bracket 10 so as to surround the periphery thereof. Since the bearing bracket 10 is a relatively small part, it can be easily fabricated together with the oil guide wall 73. Also, the bearing bracket 10 has the oil guide wall 73 integrally therewith, so that its rigidity is strengthened and effective in increasing the support rigidity of the crankshaft 12.
- the scattered oil from the oil slinger 72 is guided to the timing belt 47 side by the oil guiding wall 73, and the oil adhering to the timing belt 47 is transferred to the upper chamber by the belt 47.
- the timing belt 47 reaches the driven pulley 46, the timing belt 47 is swung off by the centrifugal force and scattered around, and collides with the surrounding wall to generate oil mist.
- This oil mist passes through the upper chamber 48c.
- the ball bearing 41 of the camshaft 36 can be lubricated as well as the entire timing transmission 37.
- the bottom of the valve operating chamber 49 is connected to the crank chamber via a series of oil return passages 77 formed in the cylinder head 5 and the cylinder block 3 along one side of the cylinder bore 3a. Communicated with 9
- the oil return passage 77 has oil from the valve operating chamber 49 to the crank chamber 9. Is going down toward the crank chamber 9 so that it flows down.
- the oil accumulated in the valve operating chamber 49 flows down the oil return passage 77 and returns to the crank chamber 9.
- the oil accumulated in the upper chamber 48c flows down through the intermediate chamber 48b and returns to the lower chamber 48a.
- the belt type timing transmission 37 can be replaced with a chain type.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES06766947T ES2380572T3 (es) | 2005-06-23 | 2006-06-20 | Sistema operativo de válvula de motor |
EP06766947A EP1895112B1 (en) | 2005-06-23 | 2006-06-20 | Engine valve operating system |
BRPI0611994-8A BRPI0611994A2 (pt) | 2005-06-23 | 2006-06-20 | sistema de operação de válvula de motor |
CA2611611A CA2611611C (en) | 2005-06-23 | 2006-06-20 | Engine valve operating system |
US11/921,016 US7878165B2 (en) | 2005-06-23 | 2006-06-20 | Engine valve operating system |
AU2006260302A AU2006260302B2 (en) | 2005-06-23 | 2006-06-20 | Engine valve operating system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-183606 | 2005-06-23 | ||
JP2005183606A JP4382010B2 (ja) | 2005-06-23 | 2005-06-23 | エンジンの動弁装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006137379A1 true WO2006137379A1 (ja) | 2006-12-28 |
Family
ID=37570408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/312286 WO2006137379A1 (ja) | 2005-06-23 | 2006-06-20 | エンジンの動弁装置 |
Country Status (15)
Country | Link |
---|---|
US (1) | US7878165B2 (ja) |
EP (1) | EP1895112B1 (ja) |
JP (1) | JP4382010B2 (ja) |
KR (1) | KR100947517B1 (ja) |
CN (1) | CN100564814C (ja) |
AR (1) | AR054145A1 (ja) |
AU (1) | AU2006260302B2 (ja) |
BR (1) | BRPI0611994A2 (ja) |
CA (1) | CA2611611C (ja) |
ES (1) | ES2380572T3 (ja) |
MY (1) | MY143511A (ja) |
PA (1) | PA8682501A1 (ja) |
PE (1) | PE20070131A1 (ja) |
TW (1) | TWI315366B (ja) |
WO (1) | WO2006137379A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008052402A1 (fr) * | 2006-10-28 | 2008-05-08 | Wuxi Kipor Power Co., Ltd. | Moteur à quatre temps à arbre à cames en tête |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009009665A1 (de) * | 2009-02-19 | 2010-08-26 | Mahle International Gmbh | Brennkraftmaschine mit wenigstens einer Nockenwelle |
JP5391381B2 (ja) * | 2010-04-12 | 2014-01-15 | 和子 杉田 | 圧縮空気往復機関 |
JP5538082B2 (ja) | 2010-06-17 | 2014-07-02 | 株式会社マキタ | 4サイクルエンジン及びこれを用いた作業機 |
JP6105410B2 (ja) * | 2013-06-28 | 2017-03-29 | ヤマハ発動機株式会社 | エンジン |
DE102014201247A1 (de) * | 2014-01-23 | 2015-07-23 | Schaeffler Technologies AG & Co. KG | Trägermodul für einen Ventiltrieb einer Brennkraftmaschine |
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JPS5666003U (ja) * | 1979-10-25 | 1981-06-02 | ||
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JPS5818004U (ja) * | 1981-07-29 | 1983-02-03 | マツダ株式会社 | エンジンのカムシヤフト保持装置 |
JPS5877101U (ja) * | 1981-11-20 | 1983-05-25 | マツダ株式会社 | エンジンのカムシヤフトスラスト受け装置 |
JPS59135308U (ja) * | 1983-03-02 | 1984-09-10 | 三菱自動車工業株式会社 | カム軸支持構造 |
JPH0714103U (ja) * | 1993-08-06 | 1995-03-10 | 株式会社クボタ | 頭上カム式エンジンの動弁装置 |
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JPS5951723B2 (ja) | 1979-10-31 | 1984-12-15 | 日本電信電話株式会社 | サ−ミスタ |
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JPS5818004A (ja) | 1981-07-24 | 1983-02-02 | 株式会社荏原製作所 | ボイラ系における缶水濃縮度計測装置 |
JPS58173888A (ja) * | 1982-04-05 | 1983-10-12 | 松下電工株式会社 | プリント配線板のスルホ−ル接続法 |
JPS5945202U (ja) | 1982-09-18 | 1984-03-26 | 本田技研工業株式会社 | カム軸取付装置 |
JPS59135308A (ja) * | 1983-01-21 | 1984-08-03 | Canon Inc | 距離測定装置 |
JP3369036B2 (ja) | 1995-12-26 | 2003-01-20 | ヤマハ発動機株式会社 | 頭上カム式エンジン |
JP3526836B2 (ja) * | 2001-09-14 | 2004-05-17 | 本田技研工業株式会社 | 内燃機関の動弁装置におけるロッカアームシャフトの回り止め装置 |
JP3966778B2 (ja) * | 2002-07-03 | 2007-08-29 | 本田技研工業株式会社 | エンジンにおける組付け用開口部閉塞構造 |
JP4025667B2 (ja) * | 2003-03-18 | 2007-12-26 | 本田技研工業株式会社 | 頭上カム型エンジン |
JP4052964B2 (ja) * | 2003-03-19 | 2008-02-27 | 本田技研工業株式会社 | ロッカーアーム軸の回り止め装置 |
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2005
- 2005-06-23 JP JP2005183606A patent/JP4382010B2/ja not_active Expired - Fee Related
-
2006
- 2006-05-25 TW TW095118586A patent/TWI315366B/zh not_active IP Right Cessation
- 2006-06-15 MY MYPI20062830A patent/MY143511A/en unknown
- 2006-06-20 CN CNB2006800223840A patent/CN100564814C/zh not_active Expired - Fee Related
- 2006-06-20 ES ES06766947T patent/ES2380572T3/es active Active
- 2006-06-20 EP EP06766947A patent/EP1895112B1/en active Active
- 2006-06-20 AU AU2006260302A patent/AU2006260302B2/en not_active Ceased
- 2006-06-20 WO PCT/JP2006/312286 patent/WO2006137379A1/ja active Application Filing
- 2006-06-20 KR KR1020077029897A patent/KR100947517B1/ko not_active IP Right Cessation
- 2006-06-20 US US11/921,016 patent/US7878165B2/en active Active
- 2006-06-20 BR BRPI0611994-8A patent/BRPI0611994A2/pt not_active IP Right Cessation
- 2006-06-20 CA CA2611611A patent/CA2611611C/en not_active Expired - Fee Related
- 2006-06-21 PE PE2006000704A patent/PE20070131A1/es not_active Application Discontinuation
- 2006-06-22 AR ARP060102676A patent/AR054145A1/es active IP Right Grant
- 2006-06-23 PA PA20068682501A patent/PA8682501A1/es unknown
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JPS5666003U (ja) * | 1979-10-25 | 1981-06-02 | ||
JPS5670103U (ja) * | 1979-11-01 | 1981-06-10 | ||
JPS5818004U (ja) * | 1981-07-29 | 1983-02-03 | マツダ株式会社 | エンジンのカムシヤフト保持装置 |
JPS5877101U (ja) * | 1981-11-20 | 1983-05-25 | マツダ株式会社 | エンジンのカムシヤフトスラスト受け装置 |
JPS59135308U (ja) * | 1983-03-02 | 1984-09-10 | 三菱自動車工業株式会社 | カム軸支持構造 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2008052402A1 (fr) * | 2006-10-28 | 2008-05-08 | Wuxi Kipor Power Co., Ltd. | Moteur à quatre temps à arbre à cames en tête |
Also Published As
Publication number | Publication date |
---|---|
CA2611611C (en) | 2010-09-21 |
CN101203661A (zh) | 2008-06-18 |
JP4382010B2 (ja) | 2009-12-09 |
EP1895112A4 (en) | 2011-02-23 |
EP1895112B1 (en) | 2012-02-29 |
KR20080014882A (ko) | 2008-02-14 |
MY143511A (en) | 2011-05-31 |
US7878165B2 (en) | 2011-02-01 |
PE20070131A1 (es) | 2007-02-09 |
KR100947517B1 (ko) | 2010-03-12 |
AR054145A1 (es) | 2007-06-06 |
CN100564814C (zh) | 2009-12-02 |
AU2006260302A1 (en) | 2006-12-28 |
AU2006260302B2 (en) | 2010-04-08 |
TW200704870A (en) | 2007-02-01 |
CA2611611A1 (en) | 2006-12-28 |
TWI315366B (en) | 2009-10-01 |
ES2380572T3 (es) | 2012-05-16 |
BRPI0611994A2 (pt) | 2010-10-13 |
PA8682501A1 (es) | 2007-01-17 |
EP1895112A1 (en) | 2008-03-05 |
US20090020083A1 (en) | 2009-01-22 |
JP2007002749A (ja) | 2007-01-11 |
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