WO2005019609A1 - 内燃機関の動弁機構 - Google Patents
内燃機関の動弁機構 Download PDFInfo
- Publication number
- WO2005019609A1 WO2005019609A1 PCT/JP2004/012192 JP2004012192W WO2005019609A1 WO 2005019609 A1 WO2005019609 A1 WO 2005019609A1 JP 2004012192 W JP2004012192 W JP 2004012192W WO 2005019609 A1 WO2005019609 A1 WO 2005019609A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- cam
- valve
- rocker arm
- swing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2305/00—Valve arrangements comprising rollers
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- 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
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- the present invention relates to a valve mechanism for an internal combustion engine that opens and closes an intake valve or an exhaust valve of the internal combustion engine.
- a rotary cam that is linked to a crankshaft of the internal combustion engine and is rotationally driven via a camshaft is used.
- a swing cam that swings back and forth in a predetermined range in conjunction with its rotary cam
- a rocker arm that opens and closes an intake valve or exhaust valve in conjunction with this swing cam.
- the rocker arm is provided with a roller
- the rocking cam is provided with a contact surface with which the roller comes into contact.
- the swing cam swings a rocker arm via a roller to drive each valve to open and close.
- each valve In a conventional valve train of an internal combustion engine, if the rocker arm and each valve are always in contact with each other, when each valve thermally expands due to a rise in the temperature of the internal combustion engine, each valve may be expanded. Causes the valve to push up the rocker arm toward the swing cam, making the closing of the valve uncertain, causing gas leakage and lowering the output. Therefore, in order to prevent the valve from being pushed up, a predetermined valve is provided between the rocker arm and each valve.
- a rocker arm is swingably supported by a hydraulic lash adjuster, so that the hydraulic lash adjuster can be used.
- the position between the rocker arm roller and the contact surface of the swing cam can be corrected by properly correcting the rocker arm support position.
- the oscillating cam and the roller can be always in contact with each other, so that the oscillating direction of the oscillating cam and the rotation direction of the roller are not reversed.
- adhesive wear between the contact surface and the roller can be prevented (for example, see Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-263015 (page 10, paragraph number 0089, FIG. 24). Disclosure of the invention
- the hydraulic lash adjuster uses oil for lubricating the internal combustion engine as its working fluid, so that air can be sucked into the oil particularly when the internal combustion engine rotates at high speed, and the viscosity of the oil at the oil temperature can be increased. , There is a problem that reliable operation cannot be performed.
- the present invention has been made in order to solve the above-described conventional problems, and has a simple structure, and even when the internal combustion engine is rotating at a high speed, the roller and the contact surface are hardly condensed. It is an object of the present invention to provide a valve mechanism for an internal combustion engine that prevents wear and tear and realizes high reliability by reliable operation. Means for solving the problem
- the invention according to claim 1 includes a cam having a cam surface having a base circle portion and a lift portion, and a roller rotating in contact with the cam surface.
- a cam having a cam surface having a base circle portion and a lift portion
- a roller rotating in contact with the cam surface.
- the invention described in claim 2 is the configuration according to claim 1, further comprising a roller support member that reciprocates while supporting the roller, a valve pressing unit that presses the intake valve or the exhaust valve, and A valve pressing member that reciprocates so as to interlock with the roller support member via the contact portion, the spring member including the roller support member; It is provided between the valve pressing member and the valve pressing member, and urges the contact portion between them in a direction to open.
- the valve pressing member is a rocker arm pivotally supported by a pivot shaft, and the roller support member is the rocker arm. It is a roller arm pivotally supported on a shaft.
- the pivot axis of the roller arm is eccentric with respect to the pivot axis of the rocker arm, and the rocker arm By rotating the pivot shaft about the axis thereof, the position of the contact portion between the rocker arm and the mouth arm can be changed, thereby making it possible to change the lift amount of the valve. It is characterized by.
- the invention according to claim 5 is the invention according to claim 3 or 4, wherein the spring member is
- a leaf spring for urging the roller arm and the rocker arm in a direction of expanding about the pivot shaft.
- the invention according to claim 6 is a shuffle that is rotationally driven by a crankshaft of an internal combustion engine. And a driving force transmitting means provided on the shaft, a swinging shaft provided coaxially or parallel to the shaft, and supported by the swinging shaft, and capable of swinging by the driving force transmitting means.
- a valve mechanism for an internal combustion engine having an oscillating cam and a roller follower reciprocated by the oscillating cam to open and close an intake valve or an exhaust valve of the internal combustion engine, wherein the oscillating cam includes the oscillating cam.
- the roller follower reciprocates in a predetermined range around the moving shaft, and the roller follower reciprocates in a predetermined range in conjunction with the rocking cam, and either the rocking force or the roller follower
- One is provided with a roller for interlocking the swing of the swing cam with the roller follower, and the other is provided with a contact surface with which the roller contacts, and the roller is located at a base circular portion of the contact surface.
- the gap for absorbing the error and thermal expansion of each part of the valve train is set to a position other than the roller that reciprocates relatively in the force transmission path based on the contact position between the roller and the contact surface.
- a valve mechanism for an internal combustion engine having a spring member that constantly contacts the roller and the contact surface during reciprocating operation of the swing cam and the roller follower. I do.
- the spring member is fitted to a rocker arm shaft that swingably supports a rocker arm having the roller, and has one end. Are locked to the rocker arm, the other end is locked to the cylinder head main body, and a screw spring for urging the rocker arm toward the swing cam is provided.
- the spring member is provided between a rocker arm having the roller and a cylinder head main body, and the rocker arm swings the rocker arm. It is characterized by having a coil spring biasing the moving cam.
- the invention according to claim 9 includes a cam having a cam surface having a base circle portion and a lift portion, and a roller rotating in contact with the cam surface, and these reciprocate relatively.
- a cam having a cam surface having a base circle portion and a lift portion
- a roller rotating in contact with the cam surface, and these reciprocate relatively.
- a valve mechanism for an internal combustion engine provided with a brake means for preventing the roller from continuing to rotate due to inertia.
- the invention according to claim 10 provides a shaft rotatably driven by a crankshaft of an internal combustion engine, a driving force transmitting means provided on the shaft, and a swinging shaft provided coaxially or parallel to the shaft.
- the roller reciprocates within a predetermined range in conjunction with the roller, and one of the rocking power unit and the roller follower is provided with a roller for linking the rocking of the rocking cam with the roller follower, and the other is provided with a roller.
- a contact surface with which a roller comes in contact is provided, and the contact surface and the roller come into contact with each other during the reciprocating operation of the swing cam and the roller follower.
- a valve mechanism for an internal combustion engine having brake means for suppressing rotation due to inertial force.
- the invention according to claim 11 is the locker according to claim 9 or 10, wherein the brake means is the roller and the swing cam or the roller follower provided with the roller.
- the brake member is disposed between the arm and the brake member and suppresses rotation of the roller due to inertial force.
- the roller reciprocates on the upper surface of the rocker arm by rotating the rotary cam, and the rocker arm swings due to the pressing force of the roller during the reciprocating movement.
- a valve operating mechanism of an internal combustion engine which is operated to open and close an intake valve or an exhaust valve, when the valve is in a closed state, a gap for absorbing errors and thermal expansion of various parts of the valve operating system is formed.
- An internal combustion engine provided between a rocker arm and the valve, and provided with a spring member that always contacts the roller and the rocker arm upper surface during relative reciprocating motion between the rocker arm upper surface and the roller. It is characterized by the valve operating mechanism.
- a gap for absorbing errors and thermal expansion of various parts of the valve train is formed between the roller and the cam surface. Downstream of the force transmission path other than the relatively reciprocating rollers, based on the contact area
- the conventional hydraulic lash adjuster does not require the use of a conventional hydraulic lash adjuster, and therefore has a simple structure and allows the roller to contact the contact surface even when the internal combustion engine is running at high speed. Adhesive wear can be prevented, and high reliability can be achieved by reliable operation.
- the roller supporting member that supports the roller and reciprocates, the valve pressing portion that presses the intake valve or the exhaust valve, and the contact portion that contacts the roller supporting member are provided.
- the spring member is provided between the roller supporting member and the valve pressing member, and the spring member is provided between the roller pressing member and the valve pressing member.
- the spring member should be compact if it has a stroke corresponding to the clearance provided between the roller support member and the valve pressing member. Can be configured.
- valve pressing member is a rocker arm pivotally supported by a pivot shaft
- roller supporting member is a roller arm pivotally supported by the pivot shaft. Therefore, the rocker arm and the roller arm are separate parts, and the number of parts is increased. Since these are pivotally supported by a common pivot shaft, the configuration in the support structure can be simplified.
- the pivot axis of the roller arm is eccentric with respect to the pivot axis of the rocker arm, and the pivot axis of the rocker arm is centered on the axis.
- the spring member is a leaf spring that urges the roller arm and the rocker arm in the direction of expanding about the pivot shaft. Therefore, it can be configured with a simple structure.
- the swing cam swings around the swing shaft in a predetermined range and reciprocates, and the roller follower moves in a predetermined range in conjunction with the swing cam.
- the roller is linked to the roller, and the other is provided with a contact surface with which the roller comes in contact. When the roller is located at the base circular portion of the contact surface, it absorbs errors and thermal expansion of various parts of the valve train.
- a gap is provided between downstream parts other than the roller that reciprocates relatively in the force transmission path with respect to the contact area between the roller and the contact surface when the swing cam and the roller follower operate reciprocally.
- the spring member is fitted to the rocker arm shaft having the roller, one end is locked to the rocker arm, and the other end is locked to the cylinder head body.
- the rocker arm has a torsion spring for urging the rocker arm toward the swing cam, the valve operating mechanism can have a simple configuration, so that the cost can be reduced.
- the torsion spring is fitted to the rocker arm shaft and provided in the valve operating mechanism, the assembling work process is simplified, and the valve operating mechanism can be configured compactly.
- the spring member is provided between the rocker arm and the cylinder head main body and has a coil spring that biases the rocker arm toward the swing cam side. It is only necessary to dispose a coil spring between the valve head and the cylinder head body, so that the assembling work process of the valve operating mechanism can be simplified.
- the roller when the roller is positioned at the base circle, a gap is provided between the reciprocating roller and the cam surface, and the roller is prevented from continuing to rotate due to inertia. Since the brake means is provided, there is no need to use a hydraulic lash adjuster as in the past, so that even with a simple structure, even when the internal combustion engine is running at high speed, adhesion wear between the rollers and the contact surface is reduced. Can be suppressed.
- the swing cam swings around the swing shaft in a predetermined range and reciprocates, and the roller follower moves in the predetermined range in conjunction with the swing cam.
- a roller for interlocking the swing of the swing cam with the roller follower is provided on one of the swing cam and the roller follower, and a contact surface with which the roller is in contact with the other.
- the conventional hydraulic lash adjuster is not used. With a simple structure, even when the internal combustion engine is rotating at a high speed, it is possible to suppress the adhesive wear between the roller and the contact surface.
- the brake means is provided between the roller and the rocker arm which is a swing cam or a roller follower provided with the roller, and is rotated by the inertial force of the roller.
- the valve mechanism can have a simpler configuration, and thus cost can be reduced.
- the assembly operation process is simplified, and the valve operating mechanism can be compactly configured.
- FIG. 1 is a vertical cross-sectional view of a main part of an internal combustion engine according to Embodiment 1 of the present invention, showing a valve operating mechanism with an intake valve closed.
- FIG. 2 is a vertical cross-sectional view of a main part of the internal combustion engine according to Embodiment 1 in a state where an intake valve is opened, showing a valve mechanism.
- FIG. 3 is a longitudinal sectional view of a main part of an internal combustion engine according to Embodiment 2 of the present invention, showing a valve operating mechanism with an intake valve closed.
- FIG. 4 is a vertical cross-sectional view of a main part showing a modification of the valve train of the internal combustion engine according to Embodiment 2, with the intake valve closed.
- FIG. 5 is a view showing a valve operating mechanism of an internal combustion engine according to Embodiment 3 of the present invention. It is a principal part longitudinal cross-sectional view in the state where the valve was closed.
- FIG. 6 is a longitudinal sectional view of a main part of an internal combustion engine according to Embodiment 4 of the present invention, showing a valve mechanism with an intake valve closed.
- FIG. 7 is a longitudinal sectional view of a main part of an internal combustion engine according to Embodiment 5 of the present invention, showing a valve mechanism with an intake valve closed.
- FIG. 8 is a fragmentary longitudinal sectional view showing a valve mechanism of an internal combustion engine according to Embodiment 6 of the present invention, with the intake valve closed.
- FIG. 9 is a longitudinal sectional view of a main part of an internal combustion engine according to Embodiment 7 of the present invention, showing a valve train with an intake valve closed.
- FIG. 10 is a longitudinal sectional view of a main part of an internal combustion engine according to Embodiment 8 of the present invention, showing a valve mechanism with an intake valve closed.
- FIG. 11 is an enlarged view of a main part of the rocker arm, viewed from the direction of arrow B in FIG. 10, according to Embodiment 8.
- FIGS. 1 and 2 are diagrams according to Embodiment 1 of the present invention.
- FIG. 1 is a longitudinal sectional view of a main part of an internal combustion engine showing a valve operating mechanism with an intake valve closed.
- FIG. 2 is a longitudinal sectional view of a main part of the internal combustion engine showing a valve operating mechanism in a state where an intake valve is opened.
- reference numeral 1 denotes a valve operating mechanism of an intake valve 11 of an internal combustion engine, and the valve operating mechanism 1 is rotationally driven by a crankshaft (not shown) of the internal combustion engine.
- a camshaft 2 as a “shaft”
- a rotating cam 3 as a “driving force transmitting means” provided on the camshaft 2
- an oscillating shaft 4 provided in parallel with the camshaft 2
- the swing cam 5 supported by the rotary cam 3 and swingable by the rotary cam 3 and swingable (reciprocally movable) by the swing cam 5 to open and close the intake valve 11 of the internal combustion engine.
- It has a rocker arm 6 as a "la follower”.
- the first embodiment shows the mechanism on the intake valve side, and the mechanism on the exhaust valve side will be described. Ministry Abbreviate.
- the camshaft 2 is arranged with its longitudinal direction facing the front and back in FIG. 1 (the direction perpendicular to the paper surface). It is driven to rotate at half the speed of the crankshaft of the internal combustion engine.
- the rotating cam 3 is fixed to the outer peripheral surface of the camshaft 2, and the outer peripheral portion protrudes from the base surface 3 a having an arc shape in plan view, as shown in FIG. Nose surface 3b.
- the central axis ⁇ 2 of the swing shaft 4 is parallel to the central axis ⁇ 1 of the camshaft 2. That is, the swing shaft 4 is arranged at a position different from and parallel to the camshaft 2.
- the oscillating cam 5 is fitted on the outer peripheral surface of the oscillating shaft 4 and is supported so as to be able to oscillate about the central axis ⁇ 2 of the oscillating shaft 4.
- a contact surface 5a which is concavely curved toward the swing shaft 4 and on which a roller 14 provided on the rocker arm 6 described later can roll is formed.
- a through hole 5c is formed in an intermediate portion of the swing cam 5, and this through hole 5c has a center axis 03 parallel to the center axis ⁇ 2 of the swing shaft 4.
- a roller shaft 7 is provided rotatably.
- the roller shaft 7 is provided with a roller 8 that contacts and interlocks with the base surface 3a or the nose surface 3b of the rotating cam 3.
- the roller 8 is formed in a circular shape in a side view, and is disposed on the outer peripheral surface of the roller shaft 7.
- the outer peripheral surface of the roller 8 is formed on the base surface of the rotary cam 3. 3a and nose surface 3b are slidable.
- a torsion spring 15 for urging the swing cam 5 toward the rotary cam 3 is fitted to the swing shaft 4. Specifically, one end of the torsion spring 15 is locked to the swing cam 5, and the other end is locked to the cylinder head body 19. As a result, the swing cam 5 is urged toward the rotating cam 3 by the urging force of the torsion spring 15, and the outer peripheral surface of the roller 8 always contacts the base surface 3a or the nose surface 3b of the rotating cam 3, thereby causing the swing cam 5 to swing.
- the cam 5 swings in a predetermined range in conjunction with the rotating cam 3 to reciprocate.
- the rocker arm 6 is swingably supported by a rocker arm shaft 12 having a center axis 05 parallel to the center axis ⁇ 2 of the swing shaft 4. hand It is arranged.
- the rocker arm 6 has a valve pressing portion 6a formed at the distal end thereof for pressing the upper surface of a shim 23 mounted on the intake valve 11, which will be described later.
- An aperture shaft 13 having a central axis 06 parallel to the central axis 05 of the rocker arm shaft 12 is rotatably provided.
- a roller 14 is rotatably disposed on the roller shaft 13, and the outer peripheral surface of the roller 14 is slidable by contacting the cam surface 5 a of the swing cam 5.
- the cam surface 5a has a base circle portion 5e, a lift portion 5f, and a ramp portion 5g connecting them.
- the rocker arm shaft 12 has a torsion spring 17 as a “spring member” for bringing the roller 14 into contact with the cam surface 5a.
- the torsion spring 17 is fitted to the rocker arm shaft 12, one end 17 a of which is engaged with the lower surface 6 b of the mouth arm 6, and the other end 17 b of which is engaged with the cylinder head body 19.
- the arm 6 is biased toward the swing cam 5 side.
- the spring force of the torsion spring 17 urges the roller arm 6 toward the swing cam 5 to press the roller 14 against the cam surface 5a of the swing cam 5, and when the swing cam 5 swings.
- the rocker arm 6 is set to such an extent that it can swing together. As a result, the rocker arm 6 is urged toward the swing cam 5 by the urging force of the torsion spring 17, and the outer peripheral surface of the roller 14 always contacts the cam surface 5a of the swing cam 5, so that the rocker arm 6 swings. It is configured to swing in a predetermined range and reciprocate in conjunction with the cam 5.
- the intake valve 11 pressed by the valve pressing portion 6a is thermally expanded due to a rise in the temperature of the internal combustion engine, and the intake valve 11 is closed. In order to prevent the uncertainty from being uncertain, it is vertically disposed at a position where a predetermined gap A is provided.
- the gap A is too large, abnormal noise is generated or the intake valve 11 cannot be reliably opened. If the clearance A is too small, the intake valve 11 cannot be reliably closed due to the valve being pushed up.Therefore, the clearance A is set in consideration of the swing range of the rocker arm 6 and the thermal expansion of the intake valve 11. T
- the intake valve 11 is provided with a collet 20 and an upper retainer 21 at an upper part, and a valve spring 22 below the upper retainer 21.
- the intake valve 11 is biased toward the rocker arm 6. Further, a shim 23 for adjusting valve clearance is mounted on the upper end of the intake valve 11.
- the rocker arm 6 is interlocked with the rocking of the rocking cam 5, and the rocking of the rocker arm 6 allows the intake valve 11 to move up and down, so that the intake valve 11 can be opened and closed. Become.
- valve train 1 configured as described above will be described in detail with reference to FIGS.
- valve train 1 In order for the intake valve 11 to change from the closed state to the open state, the valve train 1 operates as follows.
- the camshaft 2 is rotated by the crankshaft of the internal combustion mechanism at half the rotation speed of the crankshaft, and the rotation of the camshaft 2 causes the rotational force mu 3 to be increased.
- the camshaft 2 is rotationally driven in the direction of the arrow in FIG.
- the rotating cam 3 is rotationally driven by the crankshaft of the internal combustion engine via the camshaft 2, and as shown in FIG.
- the swing cam 5 is pressed, and the swing cam 5 is swung counterclockwise in FIG. 1 against the urging force of the torsion spring 15.
- valve operating mechanism 1 operates as follows to change the intake valve 11 from the open state to the closed state.
- the roller 8 is pressed by the nose surface 3b of the rotary cam 3, and the intake valve 11 is opened.
- the roller 8 of the oscillating power unit 5 moves from the nose surface 3 b of the rotary cam 3 to the base surface as shown in FIG. Slide 3a.
- the swinging direction of the swing cam 5 is reversed while the roller 8 is in contact with the rotary cam 3 by the urging force of the torsion spring 15, and the swing cam 5 swings clockwise in FIG.
- the roller 14 is constantly pressed against the cam surface 5a of the swing cam 5 by the torsion spring 17, so that the swing direction of the swing cam 5 and the rotation direction of the roller 14 are always in the same direction. Have Therefore, it is possible to prevent the occurrence of cohesive wear caused when the swing direction of the swing cam 5 and the rotation direction of the roller 14 are reversed.
- roller 14 is provided on the rocker arm 6, and the force forming the cam surface 5a with which the roller 14 contacts the lower end of the swing cam 5 is not limited to this. Even if the roller 14 is provided and the cam surface 5a with which the roller 14 comes into contact is formed at the upper end of the rocker arm 6, the rocker arm 6 and the rocker arm 6 do not adhere and wear between the roller 14 and the cam surface 5a. Can swing S.
- the roller 14 comes into contact with the swing cam 5 that swings around the swing shaft 4 within a predetermined range and reciprocates.
- a rocker arm 6 that reciprocates by swinging within a predetermined range in conjunction with the swing cam 5 is provided with a roller 14 that links the swing of the swing cam 5 with the rocker arm 6.
- the torsion spring 17 is fitted to a rocker arm shaft 12 that swingably supports the rocker arm 6, one end 17a is locked to the rocker arm 6, and the other end 17b is connected to the cylinder head body. Since the locker arm 19 is locked to the rocker arm 19 and urges the rocker arm 6 toward the swing cam 5, the valve mechanism can have a simpler configuration, so that the cost can be reduced. Further, since the torsion spring 17 is fitted to the rocker arm shaft 12 and provided in the valve operating mechanism 1, the assembling work process is simplified, and the valve operating mechanism 1 can be compactly constructed.
- the rotating cam 3 of the camshaft 2 is used as the "driving force transmitting means".
- the present invention is not limited to this. It is also possible to transmit the swing cam 5 via a link.
- the rocker arm 6 is used as a “roller follower”, the driving force from the swing cam 5 is transmitted directly to the valve 11 via the roller 8 without using the rocker arm 6. You can also.
- FIGS. 3 and 4 are longitudinal cross-sectional views of a main part of the internal combustion engine according to Embodiment 2 with the intake valve force S closed.
- a coil spring 26 provided between the rocker arm 6 and the cylinder head main body 19 allows the rocker arm 6 to swing the rocking cam 5. To bring the roller 14 provided on the rocker arm 6 into contact with the cam surface 5a of the swing cam 5.
- the coil spring 26 is disposed so as to be substantially parallel to the intake valve 11, and one end 26 a of the coil spring 26 is engaged with the lower surface 6 b of the rocker arm 6. The other end 26b is locked to the cylinder head main body 19, and urges the rocker arm 6 toward the swing cam 5. Further, the spring force of the coil spring 26 is set to When the roller 14 is pressed against the cam surface 5a of the oscillating cam 5 by urging the oscillating cam 5 and the oscillating cam 5 is oscillated, the rocker arm 6 is set to such an extent that the rocker arm 6 can oscillate in conjunction therewith. Has been. Thus, the rocker arm 6 is urged toward the swing cam 5 by the urging force of the coil spring 26, and the outer peripheral surface of the roller 14 is always in contact with the cam surface 5a of the swing cam 5.
- a coil spring 26 is provided between the lower surface 6 b of the rocker arm 6 and the cylinder head body 19 so that the outer peripheral surface of the roller 14 contacts the cam surface 5 a of the swing cam 5.
- the rocking force is not limited to this, and as shown in FIG. 4, the rocker arm 6 is formed into a seesaw shape that swings around the rocker arm shaft 12, and one end 6c of the rocker arm 6 has the above-described shape.
- the valve pressing portion 6a is formed at the distal end, and the roller shaft 13 and the roller 14 are provided between the valve pressing portion 6a and the rocker arm shaft 1.
- a coil spring 26 is provided between the upper surface of the other end 6d and the cylinder body 19, one end 26a of which is locked by the upper surface of the rocker arm 6, and the other end 26b is connected to the cylinder head body 19.
- the rocker arm 6 can be urged toward the swing cam 5 to bring the roller 14 provided on the rocker arm 6 into contact with the cam surface 5a of the swing cam 5.
- the force roller 14 configured by using a coil spring 26 different from the spring member of the first embodiment is different from that of the first embodiment. Since the urging force is acting in the same direction as that of the first embodiment, the operation is the same as that of the first embodiment, and the description of the operation of the second embodiment is omitted.
- the spring member is provided between the rocker arm 6 and the cylinder body 19 and has a coil spring 26 for urging the rocker arm 6 toward the swing cam 5, so that the rocker arm 6 and the cylinder head 19 Since the roller 14 and the cam surface 5a can be brought into contact with each other simply by disposing the coil spring 26 between the main body 19, the assembly process of the valve train 1 can be simplified.
- FIG. 5 shows the valve operating mechanism of the internal combustion engine according to Embodiment 3 in which the intake valve is closed. It is a principal part longitudinal sectional view of a state.
- the third embodiment is a valve mechanism 1 for an internal combustion engine that is capable of adjusting the lift amount of each valve by allowing the swing shaft 4 to move to a predetermined position.
- a roller 33 is provided on the outer peripheral surface of the oscillating shaft 4, and the roller 33 oscillates the oscillating shaft 4 formed on the cylinder head body 19. It is in contact with the guide portion 19a which is located at a predetermined position. Further, when the swing cam 5 is pressed by the control cam 34 described below, the swing shaft 4 can move in a range from a solid line in FIG. 5 to a range shown by a two-dot chain line in FIG. Is provided on the cylinder head main body 19.
- the control cam 34 is fixed to an outer peripheral surface of a control shaft 35 provided in parallel with the camshaft 2. Further, the outer peripheral portion of the control cam 34 is formed into a shape capable of guiding the swing shaft 4 to a predetermined position by contacting the swing cam 5 and rotating the control cam 34 at a predetermined angle.
- One end of the control shaft 35 is connected to an actuator (not shown) for driving the control shaft 35 to rotate around a central axis 08 of the control shaft 35 within a predetermined angle range.
- Control means (not shown) for controlling the angle of the actuator according to the operating state of the internal combustion engine is connected to the actuator.
- the rocker arm 6, which reciprocates by swinging in a predetermined range in conjunction with the swing cam 5, has the same configuration as that of the first embodiment, and has a valve pressing portion 6a formed thereon and a roller shaft.
- a rocker arm shaft 12 is provided so as to be swingable.
- a torsion spring 17 is provided on the rocker arm shaft 12 as a spring member for keeping the roller 14 in contact with the cam surface 5a.
- the control cam 34 is rotated by a predetermined angle about the central axis # 8 of the control shaft 35. Further, when the control cam 34 is rotated by a predetermined angle, the roller 33 slides on the guide portion 19a of the cylinder body via the swing cam 5 by the control cam 34, for example, from the position shown by the solid line in FIG.
- the swing shaft 4 is moved to a predetermined position as shown by a two-dot chain line in FIG.
- the position of the cam surface 5a of the swing cam 5 changes.
- the swing amount of the rocker arm 6 can be changed, and the lift amount of the intake valve 11 moved up and down by the rocker arm 6 can be adjusted.
- the roller 14 and the cam surface 5a are brought into contact with each other by a torsion spring 17 similar to the first embodiment as a spring member.
- a torsion spring 17 similar to the first embodiment as a spring member.
- the present invention is not limited to this. It is possible to make the roller 14 and the cam surface 5a come into contact with each other by using a coil spring 26 as a spring member similar to the second embodiment.
- the rocker arm 6 also uses the torsional spring 17 to swing the rocking cam 5. Side, the swing shaft 4 is moved to a predetermined position, and even if the position of the cam surface 5a of the swing cam 5 changes, the cam surfaces of the rollers 14 of the rocker arm 6 and the swing cam 5 are changed. Since 5a is in contact, it is possible to prevent adhesive wear.
- FIG. 6 is a vertical cross-sectional view of a main part of an internal combustion engine according to Embodiment 4 in a state where an intake valve is closed.
- the rotating cam 3 is tapered, and the rotating cam 3 is moved in the direction of the central axis ⁇ 1 of the camshaft 2 so that the outer peripheral portion of the rotating cam 3 and the swing cam 5
- the valve mechanism 1 of the internal combustion engine is capable of adjusting the lift amount of each valve by changing the contact position of the valve.
- the rotating cam 3 is fixed to the outer peripheral surface of the camshaft 2, and the outer peripheral portion of the rotating cam 3 has an arc-shaped base surface 3a in plan view.
- the nose surface 3b protrudes from the base surface 3a. Also, it is formed in a tapered shape in the front and back direction in FIG. 6 (the direction perpendicular to the paper surface). That is, the base surface 3a and the nose surface 3b of the outer peripheral surface of the rotary cam 3 are inclined with respect to the center axis Ol of the camshaft 2.
- an actuator (not shown) for moving the camshaft 2 in a predetermined range in the direction of the central axis ⁇ ⁇ 1 is connected.
- Control means (not shown) for controlling the movement of the actuator according to the operating state of the fuel engine is connected.
- the outer peripheral surface of the roller 8 provided on the oscillating cam 5 oscillated by the rotating cam 3 can slide on the base surface 3a and the base surface 3b of the rotating cam 3 formed in a tapered shape. The outer surface.
- the rocker arm 6, which reciprocates by swinging in a predetermined range in conjunction with the swing cam 5, has the same configuration as that of the first embodiment, and has a valve pressing portion 6a formed thereon and a roller shaft.
- a rocker arm shaft 12 is provided so as to be swingable.
- a torsion spring 17 as a spring member for constantly bringing the roller 14 into contact with the cam surface 5a is provided on the rocker arm shaft 12.
- the rotary cam 3 is moved in the predetermined direction in the direction of the central axis Ol of the camshaft 2. Further, when the rotating cam 3 is moved within a predetermined range, the rotating cam 3 is formed in a tapered shape.
- the swing cam 5 is moved from the position shown to a predetermined position shown by a two-dot chain line in FIG.
- the position of the cam surface 5a of the swing cam 5 changes, so that the swing amount of the rocker arm 6 can be changed, and the rocker arm 6 can be moved up and down.
- the lift amount of the intake valve 11 to be adjusted can be adjusted.
- the roller 14 and the cam surface 5a are brought into contact with each other by a torsion spring 17 similar to the first embodiment as a spring member.
- a torsion spring 17 similar to the first embodiment as a spring member.
- the present invention is not limited to this. It is possible to make the roller 14 and the cam surface 5a come into contact with each other by using a coil spring 26 as a spring member similar to the second embodiment.
- FIG. 7 is a vertical cross-sectional view of a main part of an internal combustion engine according to Embodiment 5 in a state where the intake valve is closed, showing the valve mechanism.
- the roller shaft 7 provided on the swing cam 5 and provided with the roller 8 that comes into contact with the rotating cam 3 is moved in a predetermined range to move the center axis ⁇ 3 of the roller shaft 7
- the valve mechanism 1 of the internal combustion engine is capable of adjusting the lift amount of each valve by varying the relative distance between the swing shaft 4 and the center axis 02.
- a through hole 5 c through which the roller shaft 7 of the swing cam 5 penetrates is formed so as to guide a predetermined distance along the longitudinal direction of the roller shaft 7.
- the guide direction is formed so as to be inclined with respect to the radial direction of the camshaft 2.
- the valve mechanism 1 is provided with a roller variable mechanism for guiding the roller shaft 7 passed through the through hole 5c for a predetermined distance.
- the variable roller mechanism has an eccentric shaft 9 fixed to the swing shaft 4 and one end 10a connected to the roller shaft 7, and the other end 10b connected to the eccentric shaft 9. Arm 10.
- the eccentric shaft 9 is provided on the oscillating shaft 4 such that the central axis 04 is parallel to the central axis ⁇ 2 of the oscillating shaft 4 and at an eccentric position.
- an actuator (not shown) that drives the swing shaft 4 to rotate around the central axis 02 within a predetermined angle range is connected to one end of the swing shaft 4.
- Control means (not shown) for controlling the angle of the actuator according to the operating state of the internal combustion engine is connected to the actuator.
- the arm 10 is formed in such a shape that the distance between the central axis ⁇ 3 of the roller shaft 7 and the central axis 04 of the eccentric shaft 9 can be kept constant.
- the rocker arm 6, which reciprocates by swinging in a predetermined range in conjunction with the swing cam 5, has the same configuration as that of the first embodiment, and has a valve pressing portion 6a formed thereon and a roller shaft.
- a rocker arm shaft 12 is provided so as to be swingable.
- the rocker arm shaft 12 is provided with a torsion spring 17 as a spring member for always bringing the roller 14 into contact with the cam surface 5a.
- the relative distance between the central axis 03 of the roller shaft 7 and the central axis ⁇ 2 of the swing shaft 4 is varied, for example, as shown by a solid line in FIG.
- the swing cam 5 is moved from the position shown to a predetermined position shown by a two-dot chain line in FIG.
- the rocking cam 5 moves to a predetermined position, the position of the cam surface 5a of the rocking cam 5 changes, so that the rocking amount of the rocker arm 6 can be changed. It is possible to adjust the lift amount and the like of the intake valve 11.
- the roller 14 and the cam surface 5a are brought into contact with each other by a torsion spring 17 similar to the first embodiment as a spring member.
- a torsion spring 17 similar to the first embodiment as a spring member.
- the present invention is not limited to this. It is possible to make the roller 14 and the cam surface 5a come into contact with each other by using a coil spring 26 as a spring member similar to the second embodiment.
- each valve By moving the roller shaft 7 configured as described above in a predetermined range and changing the relative distance between the central axis 03 of the roller shaft 7 and the central axis ⁇ 2 of the swing shaft 4, each valve can be controlled. Also in the valve mechanism 1 for varying the lift amount, the rocker arm 6 is urged to the swing cam 5 side by the torsion spring 17, so that the swing shaft 4 is moved to a predetermined position, and the swing cam 5 Even if the position of the cam surface 5a changes, the roller 14 of the rocker arm 6 and the cam surface 5a of the swing cam 5 are in contact with each other, so that it is possible to prevent cohesive wear. [0116] Other configurations and operations are the same as those of the first embodiment of the invention, and a duplicate description will be omitted.
- FIG. 8 is a longitudinal cross-sectional view of a main part of an internal combustion engine according to Embodiment 6 with the intake valve closed, showing the valve mechanism.
- a roller 14 is provided in which a rocker arm 6 as a “valve pressing member” contacts a force surface 5 a of a swing cam 5, and the rocker arm 6 is interlocked with the swing of the swing cam 5. It has a roller arm 6c as a “roller support member”, and a rocker arm body 6d that swings in conjunction with the roller arm 6c to move the intake valve 11 up and down. Further, unlike the spring member of the first embodiment, the roller arm 6c is urged toward the swing cam 5 by the leaf spring 28 so that the roller 14 comes into contact with the cam surface 5a of the swing cam 5.
- roller arm 6c freely movable to a predetermined position and changing the contact position between the roller 14 provided on the roller arm 6c and the cam surface 5a of the swing cam 5, the lift amount of each valve can be reduced.
- This is a valve mechanism 1 of an internal combustion engine that can be adjusted.
- a center axis ⁇ 7 is parallel to a center axis ⁇ 5 of the rocker arm shaft 12 as a “pivot shaft”.
- An eccentric shaft 29 is fixedly provided at an eccentric position, and the roller arm 6c of the rocker arm 6 is rotatably locked to the eccentric shaft 29 by a leaf spring 28. .
- the roller arm 6c is formed at one end with an engaging portion 6e that engages with the outer peripheral surface of the eccentric shaft 29 and is slidable on the outer peripheral surface of the eccentric shaft 29. Further, a fitting portion 6f is formed at a position adjacent to the engaging portion 6e so that a leaf spring 28 for integrally locking the roller arm 6c and the eccentric shaft 29 is not detached. At the other end, a through-hole 6g into which a roller shaft 13 for supporting a roller 14 sliding on the cam surface 5a of the swinging power unit 5 is formed, and a through-hole 6g is formed below the through-hole 6g.
- rocker arm body 6d of the rocker arm 6 swings around the rocker arm shaft 12.
- a valve pressing portion 6a that is movably supported and disposed and that presses the upper surface of a shim 23 mounted on the intake valve 11 is formed at the distal end.
- a contact surface 6i with which a distal end portion 28b of a leaf spring 28 described later contacts is formed above the valve pressing portion 6a, and a pressing portion formed on the roller arm 6c is formed above the contact surface 6i.
- a pressing surface 6j pressed by 6h is formed.
- the leaf spring 28 as a spring member is formed in a predetermined shape by bending a flat spring at a plurality of locations. More specifically, a locking portion 28a that is bent into a shape fitted to the fitting portion 6f of the roller arm 6c and a shape fitted to the eccentric shaft 29, and that integrally locks the roller arm 6c and the eccentric shaft 29. Is formed.
- the tip 28b of the roller arm 6c extends toward the rocker arm body 6d and is in contact with a contact surface 6i formed on the rocker arm body 6d. Furthermore, when the roller arm 6c and the eccentric shaft 29 are integrally stopped by the lock system lock 28a, the leaf spring 28 is urged in a direction in which the roller arm 6c and the rocker arm body 6d expand. It is formed in a shape.
- a predetermined gap A is provided between the valve pressing portion 6a of the roller arm 6c and the pressing surface 6j of the rocker arm body 6d. This gap A is the same as the gap A between the valve pressing portion 6a and the intake valve 11 of the first embodiment.
- roller arm 6c Since the roller arm 6c is integrally locked to the eccentric shaft 29 by the plate spring 28 so that the roller arm 6c can slide on the outer peripheral surface of the eccentric shaft 29, the swing cam 5 When is pivoted, the roller arm 6c is pivoted toward the intake valve 11 via the roller 14 and the roller shaft 13 against the urging force of the leaf spring 28. Further, when the roller arm 6c is swung toward the intake valve 11, the pressing portion 6h of the roller arm 6c presses the pressing surface 6j of the rocker arm main body 6d, and the rocker arm main body 6d is swung toward the intake valve 11 side. As a result, the intake valve 11 can be opened and closed.
- roller arm 6c is urged toward the swing cam 5 by the leaf spring 28,
- the outer peripheral surface of the roller 14 provided on 6c is always in contact with the cam surface 5a of the swing cam 5.
- an actuator that drives the rocker arm shaft 12 to rotate around a central axis ⁇ 5 within a predetermined angle range is connected to one end of the rocker arm shaft 12.
- the actuator is provided with an actuator according to the operating state of the internal combustion engine.
- Control means (not shown) for controlling the angle of the eta is connected.
- the roller arm 6c thus configured is movable to a predetermined position, and the contact position between the roller 14 provided on the roller arm 6c and the cam surface 5a of the oscillating cam 5 is changed to change each valve.
- the roller arm 6c is urged by the leaf spring 28 toward the swing cam 5, so that the roller arm 6c is positioned at a predetermined position. Even if the contact position between the roller 14 and the cam surface 5a changes, the roller 14 of the rocker arm 6 and the cam surface 5a of the oscillating cam 5 are in contact with each other. Is possible.
- the leaf spring 28 can be configured as a compact one that has a stroke corresponding to the gap A provided between the roller arm 6c and the rocker arm 6, and can be formed as well. By using, it can be configured with a simple structure.
- roller arm 6c and the rocker arm 6 are separate parts, and the number of parts is increased. However, since they are pivotally supported by the common rocker arm shaft 12, the configuration in the support structure can be simplified.
- FIG. 9 is a view according to Embodiment 7 of the present invention, and is a longitudinal sectional view of an essential part showing a valve mechanism of an internal combustion engine with an intake valve closed.
- Embodiment 7 is an embodiment corresponding to claim 12, in which the rocker arm 6 is disposed vertically movable with respect to the cylinder head body 19 via the rocker arm shaft 12, and The pressing portion 6a of the arm 6 presses the shim 23 provided at the upper end of the intake valve 11 so that the intake valve 11 is pushed down and opened against the urging force of the valve spring 22. I have.
- a lower end portion 6b of the rocker arm 6 is in contact with a distal end portion 40b of a pressing spring 40 as a "spring member" having a base end portion 40a fixed to the cylinder head main body 19, and has an opening.
- the rocker arm 6 is biased to rotate counterclockwise.
- a first roller 41a as a small-diameter “roller” of the roller member 41 is in contact with the upper surface 6c of the rocker arm 6, and the first roller 41a and the upper surface 6c relatively reciprocate. It is configured to The large-diameter second roller 41b of the roller member 41 is in contact between the rotary cam 3 and the control member 42.
- the control member 42 has a cam surface 42a having a ramp portion and a lift portion, and a base circle 42b, and the upper surface 6c is formed concentrically with the base circle 42b.
- the first and second rollers 41a and 41b are configured to rotate about a shaft 41c.
- the roller member 41 is disposed between the rocker arm 6, the rotary cam 3, and the control member 42, and the rocker arm 6 is urged upward by the pressing spring 40, whereby The roller member 41 is always held between the three members.
- the second roller 41b of the roller member 41 comes into contact with the base surface 3a of the rotary cam 3 and the base circle 42b of the control member 42.
- the gap A is formed between the pressing portion 6a of the rocker arm 6 and the intake valve 11 with the first roller 41a of the roller member 41 in contact with the upper surface 6c of the rocker arm 6. I have.
- roller member 41 is urged by the return spring 43 to 41 is pressed against the rotating cam 3 and the control member 42.
- the return spring 43 has a base end 43a attached to the intake valve 11 side and a distal end 43b abutting against the roller member 41, whereby the roller member 41 is urged by the return spring 43. Then, the rotary cam 3 and the control member 42 come into contact with each other.
- the pressing spring 40 for always bringing the first roller 41a of the mouthpiece member 41 into contact with the upper surface 6c of the rocker arm 6 during the relative reciprocating motion between the rocker arm 6 and the roller member 41 is provided.
- FIGS. 10 and 11 are diagrams according to the eighth embodiment, and FIG. 10 is a vertical cross-sectional view of a main part of an internal combustion engine showing a valve operating mechanism with an intake valve closed.
- FIG. 11 is an enlarged view of a main part of the rocker arm viewed from the direction of arrow B in FIG.
- the rocker arm 6 has the cam surface 5a of the rocking cam 5 and the roller 14 when the rocking cam 5 and the rocker arm 6 are not reciprocated by the spring member of the first embodiment.
- a brake means is provided for suppressing the rotation of the roller 14 provided on the rocker arm 6 due to the inertial force when the and are not in contact with each other.
- a wave washer 37 as a suppressing member is provided between the roller 14 and the rocker arm 6 provided with the roller 14. .
- the wave washer 37 is disposed between the rocker arm 6 and the roller 14 by being fitted on the outer peripheral surface of the roller shaft 13 and disposed on the side surface of the roller 14.
- the wave washer 37 is provided as a suppressing member by the roller shaft 1.
- the force that suppresses the rotation of the roller 14 due to the inertial force by fitting to the member 3 is not particularly limited as long as it is a suppressing member capable of suppressing the rotation of the roller 14 due to the inertial force.
- the roller 14 comes into contact with the swing cam 5 that swings around the swing shaft 4 within a predetermined range and reciprocates. And a rocker arm 6 that reciprocates by swinging within a predetermined range in conjunction with the swing cam 5, a roller 14 that swings the swing cam 5 with the rocker arm 6.
- the roller 14 is prevented from rotating due to the inertial force when the cam surface 5a of the swing cam 5 is not in contact with the roller 14.
- the brake means is provided between the roller 14 and the swing cam 5 or the mouth arm 6 provided with the roller 14, and serves as a suppressing member for suppressing rotation of the roller 14 due to inertial force. Since the wave washer 37 is used, the valve operating mechanism can have a simpler configuration, so that the cost can be reduced. Further, since the wave washer 37 is merely fitted to the roller shaft 13, the assembly work process is simplified, and the valve mechanism 1 can be compactly constructed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP04772153A EP1666702B1 (en) | 2003-08-25 | 2004-08-25 | Valve gear of internal combustion engine |
AT04772153T ATE485440T1 (de) | 2003-08-25 | 2004-08-25 | Ventiltrieb für verbrennungsmotor |
CA002537166A CA2537166A1 (en) | 2003-08-25 | 2004-08-25 | Valve mechanism for an internal combustion engine |
DE602004029693T DE602004029693D1 (de) | 2003-08-25 | 2004-08-25 | Ventiltrieb für verbrennungsmotor |
US11/363,457 US7308874B2 (en) | 2003-08-25 | 2006-02-27 | Valve mechanism for an internal combustion engine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2003-208537 | 2003-08-25 | ||
JP2003208537 | 2003-08-25 | ||
JP2004011380A JP4237643B2 (ja) | 2003-08-25 | 2004-01-20 | 内燃機関の動弁機構 |
JP2004-011380 | 2004-01-20 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/363,457 Continuation US7308874B2 (en) | 2003-08-25 | 2006-02-27 | Valve mechanism for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
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WO2005019609A1 true WO2005019609A1 (ja) | 2005-03-03 |
Family
ID=34220641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/012192 WO2005019609A1 (ja) | 2003-08-25 | 2004-08-25 | 内燃機関の動弁機構 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7308874B2 (ja) |
EP (1) | EP1666702B1 (ja) |
JP (1) | JP4237643B2 (ja) |
AT (1) | ATE485440T1 (ja) |
CA (1) | CA2537166A1 (ja) |
DE (1) | DE602004029693D1 (ja) |
WO (1) | WO2005019609A1 (ja) |
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DE10006018B4 (de) | 2000-02-11 | 2009-09-17 | Schaeffler Kg | Variabler Ventiltrieb zur Laststeuerung einer fremdgezündeten Brennkraftmaschine |
JP3799944B2 (ja) | 2000-03-21 | 2006-07-19 | トヨタ自動車株式会社 | 内燃機関の可変動弁機構および吸気量制御装置 |
DE10123186A1 (de) * | 2001-05-12 | 2002-11-14 | Bayerische Motoren Werke Ag | Ventiltrieb-Vorrichtung zur variablen Hubverstellung eines Gaswechselventils einer Brennkraftmaschine |
JP4108295B2 (ja) * | 2001-06-14 | 2008-06-25 | 株式会社オティックス | 可変動弁機構 |
JP4362249B2 (ja) | 2001-09-28 | 2009-11-11 | 株式会社オティックス | 可変動弁機構 |
US20030121484A1 (en) * | 2002-01-03 | 2003-07-03 | Yushu Wang | Continuously variable valve timing, lift and duration for internal combustion engine |
JP2003239713A (ja) | 2002-02-18 | 2003-08-27 | Toyota Motor Corp | 内燃機関の動弁機構 |
EP1515008B1 (en) | 2002-05-17 | 2013-07-10 | Yamaha Hatsudoki Kabushiki Kaisha | Engine valve driver |
US6659053B1 (en) | 2002-06-07 | 2003-12-09 | Eaton Corporation | Fully variable valve train |
WO2004081351A1 (ja) | 2003-03-11 | 2004-09-23 | Yamaha Hatsudoki Kabushiki Kaisha | 内燃機関の可変動弁機構 |
JP4248344B2 (ja) | 2003-05-01 | 2009-04-02 | ヤマハ発動機株式会社 | エンジンの動弁装置 |
JP4248343B2 (ja) | 2003-05-01 | 2009-04-02 | ヤマハ発動機株式会社 | エンジンの動弁装置 |
JP4247529B2 (ja) | 2003-08-22 | 2009-04-02 | ヤマハ発動機株式会社 | 内燃機関の動弁機構 |
JP2005069014A (ja) | 2003-08-25 | 2005-03-17 | Yamaha Motor Co Ltd | 内燃機関の動弁機構 |
JP4237643B2 (ja) | 2003-08-25 | 2009-03-11 | ヤマハ発動機株式会社 | 内燃機関の動弁機構 |
-
2004
- 2004-01-20 JP JP2004011380A patent/JP4237643B2/ja not_active Expired - Fee Related
- 2004-08-25 CA CA002537166A patent/CA2537166A1/en not_active Abandoned
- 2004-08-25 AT AT04772153T patent/ATE485440T1/de not_active IP Right Cessation
- 2004-08-25 WO PCT/JP2004/012192 patent/WO2005019609A1/ja active Application Filing
- 2004-08-25 DE DE602004029693T patent/DE602004029693D1/de not_active Expired - Lifetime
- 2004-08-25 EP EP04772153A patent/EP1666702B1/en not_active Expired - Lifetime
-
2006
- 2006-02-27 US US11/363,457 patent/US7308874B2/en not_active Expired - Fee Related
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JPS634313U (ja) * | 1986-06-27 | 1988-01-12 | ||
JPS63309707A (ja) * | 1987-06-11 | 1988-12-16 | Fuji Heavy Ind Ltd | ロッカア−ムの可変バルブリフト装置 |
JPH09268907A (ja) * | 1996-04-01 | 1997-10-14 | Mitsubishi Motors Corp | 内燃機関の動弁機構 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7469669B2 (en) | 2003-03-11 | 2008-12-30 | Yamaha Hatsudoki Kabushiki Kaisha | Variable valve train mechanism of internal combustion engine |
US7584730B2 (en) | 2003-05-01 | 2009-09-08 | Yamaha Hatsudoki Kabushiki Kaisha | Valve train device for engine |
US7398750B2 (en) | 2003-08-22 | 2008-07-15 | Yamaha Hatsudoki Kabushiki Kaisha | Valve mechanism for internal combustion engine |
US7308874B2 (en) | 2003-08-25 | 2007-12-18 | Yamaha Hatsudoki Kabushiki Kaisha | Valve mechanism for an internal combustion engine |
US7503297B2 (en) | 2005-05-26 | 2009-03-17 | Yamaha Hatsudoki Kaisha | Valve drive mechanism for engine |
US7578272B2 (en) | 2005-05-30 | 2009-08-25 | Yamaha Hatsudoki Kabushiki Kaisha | Multiple cylinder engine |
US7980210B2 (en) | 2006-12-20 | 2011-07-19 | Yamaha Hatsudoki Kabushiki Kaisha | Variable valve drive system for engine |
Also Published As
Publication number | Publication date |
---|---|
ATE485440T1 (de) | 2010-11-15 |
EP1666702A4 (en) | 2008-12-10 |
US20060243233A1 (en) | 2006-11-02 |
DE602004029693D1 (de) | 2010-12-02 |
EP1666702A1 (en) | 2006-06-07 |
US7308874B2 (en) | 2007-12-18 |
CA2537166A1 (en) | 2005-03-03 |
EP1666702B1 (en) | 2010-10-20 |
JP4237643B2 (ja) | 2009-03-11 |
JP2005098279A (ja) | 2005-04-14 |
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