WO2007057479A1 - Dispositivo variador del árbol de levas - Google Patents
Dispositivo variador del árbol de levas Download PDFInfo
- Publication number
- WO2007057479A1 WO2007057479A1 PCT/ES2005/000625 ES2005000625W WO2007057479A1 WO 2007057479 A1 WO2007057479 A1 WO 2007057479A1 ES 2005000625 W ES2005000625 W ES 2005000625W WO 2007057479 A1 WO2007057479 A1 WO 2007057479A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- component
- camshaft
- ring
- crankshaft
- reliefs
- Prior art date
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/34403—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using helically teethed sleeve or gear moving axially between crankshaft and camshaft
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/356—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate, e.g. non-homokinetic drive
Definitions
- the present invention is related to internal combustion engines, specifically it is a device to vary the position of the camshaft of an internal combustion engine.
- a typical internal combustion engine includes an engine block, a plurality of reciprocating pistons that alternately move within the engine cylinder block, a crankshaft attached to the pistons to be rotated by reciprocating movement of said pistons, and a shaft of cams moved by the crankshaft by means of a timing chain or belt.
- the profile of the cam attached to the camshaft pushes the valves, either intake valves or exhaust valves, causing these valves to open.
- said valve will return to its original position thanks to the action of a spring closing the valve.
- the design of the cam profile as well as the position determines among other things how long the valve will remain open. In a standard four-stroke engine, an operating cycle of
- camshafts Some internal combustion engines use two camshafts, one to operate the intake valves and the other to operate the exhaust valves. Both camshafts in a dual camshaft engine can be driven by a timing chain or belt.
- SUBSTITUTE SHEET (RULE 26)
- the efficiency of an internal combustion engine can be increased by changing the position of the camshaft relative to the crankshaft.
- the camshaft can be "delayed” by hugging the intake valve closure or "advanced” for early intake valve closure.
- retracting or advancing the camshaft can be accomplished by changing the position of one of the camshafts, usually the camshaft that operates the engine intake valves relative to the other camshaft and to the crankshaft.
- Retracting or advancing the camshaft varies the engine time in terms of the operation of the intake valves relative to the exhaust valves, or in terms of valve operation relative to the position of the crankshaft. This is what the device owned by me achieves Patent No: US 6,640,760
- the efficiency of an internal combustion engine can also be increased if the intake valve is able to remain open for a longer time in the intake cycle, allowing more air-fuel mixture input.
- the camshaft variator device 11 is designed to be used in combination with a typical internal combustion engine, that of an automobile for example.
- the internal combustion engine includes a crankshaft 13 and the camshaft 15 having a longitudinal axis 17.
- the camshaft variator device 11 includes a first component 19, preferably aligned with the longitudinal axis 17 of the camshaft 15, to be fixedly connected or joined to the camshaft 15, therefore the rotation of this will cause the cams 15 rotate; a second component 21, preferably aligned with the longitudinal axis 17 of the camshaft 15, to be rotated by the crankshaft 13; and a third component 23, preferably aligned with the longitudinal axis 17 of the camshaft 15, to join the first and second component 19, 21 to each other, so that the first component 19 rotates when the second component 21 is rotated by the crankshaft. 13 and to rotate the first component 19 with respect to the second component 21 in order to vary the position of the camshaft 15 with respect to the crankshaft 13.
- the camshaft variator device 11 is preferably designed so that the longitudinal movement of the third component 23 with respect to the first component 19 causes rotation of said first component 19 with respect to the second component 21 and preferably includes a fourth component 25 to produce the longitudinal movement of the third component 23.
- the fourth component 25 includes a component of driving force as electric motors 100 and 101 through a gear mechanism rotates in one direction or another the fourth component 25 by applying a longitudinal force and longitudinal alternatively about 3 or component 23 moving it longitudinally.
- the first component 19 preferably includes a first component drive mechanism 29 having one or more (preferably three) coiled teeth 31 and a third component 23 preferably including a drive mechanism 33 having one or more (preferably three so minus) spiral teeth 35 acting with the spiral teeth 31 of the first component drive mechanism 29 therefore longitudinal movement of the third component drive mechanism 33 relative to the first component drive mechanism 29 will cause rotation of the mechanism drive gear of the first component 29.
- the drive mechanism of the component 29 can be machined or if not built as a central shaft with teeth
- the third component drive mechanism 33 can be machined and constructed of carbon steel, like a ring with spiral teeth.
- the second component 21 preferably includes a wheel 37 formed by an external pulley with teeth that fits into a timing chain or belt39 which in turn is driven by a pulley with teeth 40, mounted on the crankshaft 13 (see for example Fig. 4.)
- gear 37 can have external teeth for use with a timing chain or external grooves for use with a timing belt.
- the second component 21 preferably includes a body or a ring 41 to which the timing gear is fixedly attached. Ring 41 can be machined and made of steel or a plastic like nylon or the like.
- the third component 23 is preferably secured to the second component 21 in a manner that prevents rotation of the third component33 drive mechanism relative to the second component 21 and this in turn allows longitudinal movement of the third component 33 drive mechanism relative to the second component 21.
- the third component 23 includes a plurality of bars or guides spaced from each other, male plug type 43, and the second component 21 must have a plurality of circular holes 45 spaced from each other (female plug type) in the ring 41 to serve as a sliding receiver for the bars or guides 43 of the third component 23 in order to secure the second and third components 21,23 together in such a way as to allow the longitudinal movement of the third component 23 with respect to the second component 21 while restricting or preventing the rotation of the third component 23 with respect to the second component 21.
- the guides or bars 43 can be r Machined and made of carbon steel can even be hollow to reduce weight (See Fig. 9A).
- the bushings 47 are preferably placed between the guides or bars 43 and the circular holes 45.
- the bushings 47 can be machined and made of bronze or a similar material.
- the third component 23 preferably includes a sliding block 49 to join the third component transmission mechanism 33 and the guides 43.
- the sliding block 49 must have holes 51 to receive the ends of the bars or guides 43 and said guides must be fixedly joined by screws and a central opening 53 to receive the third component transmission mechanism 33.
- Sliding block 49 must be machined and constructed of carbon steel or a similar material.
- the camshaft variator 11 preferably includes a first thrust bearing 55 positioned between the first component 19 and the second component 21 to allow unrestricted rotation between the first component 19 and the second component 21, and a second thrust bearing 57 positioned between the third component 23 and the fourth component 25 to allow unrestricted rotation between the third component 23 and the fourth component 25.
- the third component 23 preferably includes a projecting edge 59 belonging to the male-spaced bars 43 and another edge projection 61 belonging to the slide block 49, both protruding edges 59 and 61 serve to: permit longitudinal movement of the fourth component 25 integral with the third component 23 and in turn rotation allow for the fourth component 25 relative to the 3 or component 23.
- the third Component 23 preferably includes a plurality of screws 63 extending through the block.
- the fourth component 25 preferably includes a first and second container ring 71, 65 which are rigidly joined and attached to the outer race of the thrust bearing 57 to prevent or restrict longitudinal movement of the fourth component 25 with respect to the second thrust bearing 57 and therefore to the 3 or component 23.
- These two parts 71 and 65 wrapper can be made of nylon or similar material.
- the first container ring 65 presents on one of its faces a plurality (at least 2) of profiles or reliefs of variable height 65A so that when rotating said ring 65 it applies a longitudinal force at a determined contact point such as the plurality of profiles or rounded reliefs 69A belonging to ring 69.
- the fourth component 25 should include a plurality of screws extending through the first container ring 65 and the second container ring 71 to hold said pieces together.
- the second component 21 preferably includes a third and fourth container ring 75, 77 which are joined and serve to center the main thrust bearing 55 with respect to the ring 41 and rigidly join said thrust bearing 55 to the 2nd component 21 allowing rotation of both pieces together.
- the third and fourth container rings75, 77 must be machined and made of plastic such as nylon or other material such as carbon steel or a similar material.
- the second component 21 must include a plurality of screws to join the first container ring 75, the second container ring 77 and the ring 41 to secure these parts together.
- the first component drive mechanism 29 preferably consists of a shaft extension having one end 79 and the other end 81 where the spiral teeth 31 meet.
- the first component 19 preferably includes a first connector 83 that is attached to the end 79 of the first component drive 29 by means of a key 85 and keyway for key 85 at both both the end of the shaft 79 and the first connector 83; and a series of screws 86 that extend through the first connector 83 towards the key 85.
- the first connector 83 has a diameter section change 89 that is used to house the head of a screw that joins the third connector95 and the second connector 93 with the camshaft 15.
- the first connector 83 must be machined and constructed of carbon steel or a similar material.
- the first component 19 must include a third connector 95 that connects to the second connector 93 and said connector 93 connects to the first connector 83.
- the connectors 95, 93 and 83 must be made of carbon steel or a similar material.
- a pin 96 that passes through the second connector 93, and extends from the first connector 83 to the third connector 95.
- the first component 19 must include a plurality of screws to secure the first connector 83 with the second connector 93.
- the first connector 83, the second connector 93 and the third connector 95 are rigidly secured thanks to the pin 96 avoiding slippage between connectors 83, 93 and 95.
- the second and third connectors 93 and 95 joined together form a space to contain the thrust bearing 55 and restrict the longitudinal movement of the second component 21 with respect to the first component 19 while allowing rotation of the second component 21 regarding the first
- SUBSTITUTE SHEET (RULE 26) while it allows the rotation of the second component 21 with respect to the first component 19 and by means of the transmission mechanisms of the first component and third component 29 and 33.
- the second and third connectors 93, 95 have a central hole to be rigidly secured (that there is no rotation between the connectors 93, 95 and the camshaft) by means of a screw at one end of the camshaft 15 therefore the camshaft 15 will rotate or rotate when the crankshaft 13 causes the second component 21 to rotate by means of the union between the timing belt or chain 39 and the distribution gear 37, thereby causing the third component 23 to rotate by means of the union between the ring 41 and the guides 43, thus causing the first component 19 rotate by the interaction between the first and third transmission mechanisms 29, 33 as shown in the drawings.
- the drive of the camshaft may advance or atrazar the valve timing when various sensors installed in the motor give a signal that will turn the electric motor 100 by moving the fourth component 25 and it applies a longitudinal force on 3 or component 23 achieving that the I or component 19 rotates slightly with respect to the 2 or component 21 around the longitudinal axis 17 of the camshaft 15 by means of the interaction between the transmission mechanism of the first component and the third component 29, 33 and the interaction between the nylon ring41 and the guides 43.
- Another design of the guides 43 (see figure 9A) is that their central part has a hole which makes it lighter.
- 4 or component 25 is comprised of several parts and is intended to apply a longitudinal force component 3 or 23. It is the same as that used in the previous project (see Patent my property Patent No: US 6,640,760) but placed in another position and with additional pieces. Before he was in the find of 3 or component 23 and is now located between 2 and 3 or component 21 or component 23 in order to make the device more compact and achieve greater precision and setting an engine. 4 or said component is formed by:
- ring 65 that presents on one of its faces a plurality of profiles or reliefs of variable height 65A and on another of its faces presents a plurality of cavities
- ring 67 presenting on one of its faces a plurality of cavities where a plurality of profiles or reliefs of variable height 73B fit and act, additionally it presents on its opposite face a plurality (at least 4) profiles or reliefs of variable height 67A and has gear teeth 67B on its periphery.
- ring 73 that presents on one of its faces a semi-circular cavity 73A where the eccentric 91 acts and on its opposite face it presents a plurality of profiles or reliefs of variable height 73B
- ring 71 that has a change in section on one of its faces and together with the rear part of the ring 65 form a cavity to accommodate a thrust bearing 57 and rigidly join the outer race of said bearing of empuje57 .
- - bars 98 which are fixed rigidly motors 100 and 101, the ring with the plurality of extensions 69, the plurality of gears 106, 107 and 108 which are coupled and synchronized movement between 2 and 4 or or component (21,25) and the eccentrics 91 .
- - and two electric motors 100 and 101 where the electric motor 100 that by means of an endless screw 102 acts on the gear teeth 65B moves the ring 65 in both directions and the 2 or electric motor 101 that by means of an endless screw 103 acts on the gear teeth 67B moving the ring 67 in both directions.
- the ring with the plurality of extensions 69 with rounded profiles or reliefs 69A interact with the variable profiles or reliefs 65A of the ring 65, said ring with the
- SUBSTITUTE SHEET (RULE 26) they interact with the profiles or variable reliefs 65A of the ring 65, said ring with the plurality of extensions 69 is rigidly attached to the bars 98 through the holes 69B.
- the bars 98 are used to rigidly fix the ring with rounded extensions or reliefs 69 and the electric motor 100 and 101.
- the electric motor 100 whose gear 102 interacts with the straight teeth 65B of the ring 65.
- Said ring 65 is the existing part of the previous design but modified, since the existing connecting side pins have been removed and a plurality of gear teeth 65B have been placed on the outside of the part.
- Bearing empuje57 is enclosed between the edges 59 of the guide 43 and the edge 61 of the slide block 49 to restrict the longitudinal movement of the four or component 25 relative to the 3 or component 23 and allow rotation of said thrust bearing 57 relative to the 4 or component 25, ie allows rotation of the 4 or component 25 relative to the 3 or component 23. Then on turning the screw 102 of the electric motor 100 and interact with the teeth of spur gear 65B ring 65 will rotate said ring 65 about the axis and therefore the assembly attached to said ring 65 formed by ring 71 and thrust bearing 57 will rotate.
- the plurality of profiles or reliefs of variable height 65A will act on the plurality of profiles or reliefs rounded 69A of the ring with rounded extensions or reliefs 69 producing a longitudinal displacement of the ring 65 and also of the assembly integral to said ring 65 formed by: ring 71 and the thrust bearing 57 therefore will produce a longitudinal displacement of the 3 or component 23 relative to the I or component 19.
- This longitudinal displacement of the 3 or component 23 produced by the four or component 25 will cause the I or component 19 rotate slightly from the 2 or component 21 around the longitudinal axis 17 of the camshaft 15 by the interaction between the first and third transmission mechanism 29, 33 and the interaction between the ring 41 and the guides 43, as shown in the drawings.
- the design of the 4 or component 25 is as simple that the component parts (2 rings, the bearing and other) are not complex, however are very simple as it does not have internal slots intricate to operate or complex links with other parts, making them easy to manufacture parts and therefore makes 4 or a set component 25 without excessive production costs, on the other hand does not require high mechanical accuracy or intricate fo ⁇ nas to fulfill a correct working.
- SUBSTITUTE SHEET (RULE 26) Another improvement introduced in the 4 or component ring extensions or reliefs rounded 69 which is rigidly connected to the plurality of bars 98 and which in turn contains 4 or component 25 (formed jointly by the rings 65, 67, 71 and the thrust bearing 57), its function is to act with the ring of profiles or variable reliefs 65 and to decrease the vibrations of the device.
- the actuator or component 4 or 25 described above is that the height of the profiles or reliefs 65 A of the ring 65 can be varied and therefore the response of the device can be adapted to the particular needs of each motor. and in a determined range of specific rpm.
- the device can advance or retard the valve timing when the four or component 25 activates a longitudinal force that act on the 3 or component 23 and cause the I or component 19 to rotate slightly about 2 or component 21 around the longitudinal axis 17 of the camshaft 15 thanks to the interaction between the first and third transmission mechanisms 29, 33 and the interaction between the ring 41 and the guides 43, as shown in the drawings.
- the camshaft variator device of the present invention provides a mechanical device capable of varying the position of the camshaft of an internal combustion engine allowing high power and torque values at high revolutions per minute (rpm) and high values. of power and torque and a stable idle speed at low revolutions per minute and lower fuel consumption and less mechanical wear on the internal combustion engine. In other words, the device makes the motor more elastic (power delivery at a lower speed of revolutions per minute).
- the camshaft variator device is composed of a first part or I or component 19 to be connected or joined to the camshaft 15, a second part or 2 or component 21 in which the crankshaft timing belt or chain 13 goes.
- SUBSTITUTE SHEET (RULE 26) crankshaft 13 while the engine is running.
- One of the main purposes of varying the position of the camshaft 15 is to change the angle between the intake cam and the exhaust cam, since the angle between the intake and exhaust cam plays an important role in the amount of air mixture -fuel that enters the cylinder- piston.
- the cam opens the intake valve sooner or later, allowing more or less quantity of air-fuel mixture.
- an engine with a camshaft having an angle between the intake cam and exhaust cam of 114 ° has good low torque (rpm) power and torque and good vacuum speed.
- an engine with an angle between the intake and exhaust cam of 108 ° develops better values of torque and power at high rpm.
- the present invention causes the intake camshaft to rotate relative to the exhaust camshaft, changing the angle between the intake cam and the exhaust cam thus making it possible to achieve a better filling of air-fuel mixture of the cylinder-piston when the present device causes the intake valve to open prematurely, closing the angle between the intake and exhaust cam at high rpm.
- the present invention is preferably set at low rpm, which means that the angle between the intake and exhaust cam is adjusted with the "factory" arrangement at low rpm, with a relatively wide angle between the intake and exhaust cam, causing the intake valve to open later.
- the present invention allows the angle between the intake or intake cam and the exhaust cam to be changed simply by applying a longitudinal force improving torque and power over a wider range between
- SUBSTITUTE SHEET join a longitudinal force improving torque and power in a wider range between low rpm and high rpm, providing better values of torque and power, decrease fuel consumption and less mechanical wear on the engine.
- the new design of the 4 or component 25 and allows the variation of the valve timing allows a new additional function which is the variation of the duration of opening and closing valves accurately.
- camshaft 15 begins to close the valve, consequently bringing an additional delay of said camshaft 15 with respect to the crankshaft 13 and therefore delaying the closing of said valve, thus increasing the opening time of said valve called duration. This achieves that the valve remains longer open than the camshaft 15 can originally achieve and therefore a higher filling of air-fuel mixture of the cylinder is achieved.
- valve cam 91 Once the valve cam 91 is closed ceases to act on the 4 or component 25, the longitudinal movement alternate ends returning said four or component 25 and 3 or component 23 to its original position, thus the camshaft 15 returns to its initial lag (lag is produced by longitudinal movement of the four or component 25 by the action of the motor (100) on the gear teeth 65B of the ring 65.
- the entire device explained above and shown corresponding to the four or component 25 it does not have a high mechanical complexity, since its manufacture is simpler and, on the other hand, its design allows a new additional function such as the variation of duration of opening and closing of valves. Besides, the design allows the use of plastic materials instead of carbon steel which makes it lighter, cheaper and highly reliable. None of the systems on the market today has the ability to vary the duration of valve opening and closing.
- FIG. 1 is a side view of the camshaft variator device, where one half of the drawing shows a longitudinal section FIG. 2 It is a longitudinal section of the camshaft variator device
- FIG. 3 is a view of the longitudinal section of the camshaft variator device.
- FIG. 4 is a view taken on line 4-4 of FIG. 2 with parts added and omitted for better clarity
- FIG. 5 is a view taken on line 5-5 of FIG. 2 with parts omitted for better clarity
- FIG. 6 It is a view of the longitudinal section of the transmission mechanism of the I or component of the camshaft variator device
- FIG.7 is a perspective view of the transmission mechanism 3 or the drive component device camshaft.
- FIG. 8 is a perspective view of the sliding block 3 or the drive component device camshaft
- FIG. 9 is a perspective view of the guides within the component 3 or the inverter device camshaft
- FIG.10 is a front view of the ring 2 or the drive component device camshaft.
- FIG.11 is a perspective view of the component 4 or the drive device camshaft
- FIG.12 is a view taken on line 12-12 of FIG. 1 of the camshaft variator device.
- FIG. 13 is a view taken on line 13-13 of FIG. 12 of the camshaft variator device.
- FIG. 14 is a view taken on line 14-14 of FIG. 13 of the camshaft variator device.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/085,206 US8443774B2 (en) | 2005-11-16 | 2005-11-16 | Camshaft variator device |
PCT/ES2005/000625 WO2007057479A1 (es) | 2005-11-16 | 2005-11-16 | Dispositivo variador del árbol de levas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/ES2005/000625 WO2007057479A1 (es) | 2005-11-16 | 2005-11-16 | Dispositivo variador del árbol de levas |
Publications (1)
Publication Number | Publication Date |
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WO2007057479A1 true WO2007057479A1 (es) | 2007-05-24 |
Family
ID=38048313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/ES2005/000625 WO2007057479A1 (es) | 2005-11-16 | 2005-11-16 | Dispositivo variador del árbol de levas |
Country Status (2)
Country | Link |
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US (1) | US8443774B2 (es) |
WO (1) | WO2007057479A1 (es) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB347806A (en) * | 1929-03-30 | 1931-05-07 | Georges Boulet | Improvements in means for adjusting the valve gears of internal combustion engines |
US4976229A (en) * | 1990-02-12 | 1990-12-11 | Siemens Automotive L.P. | Engine camshaft phasing |
US5860328A (en) * | 1995-06-22 | 1999-01-19 | Chrysler Corporation | Shaft phase control mechanism with an axially shiftable splined member |
US6352060B1 (en) * | 1998-05-04 | 2002-03-05 | Paul Jospeh Bentley | Variable timing poppet valve apparatus |
US6640760B1 (en) * | 2002-05-17 | 2003-11-04 | Pedro A. Plasencia | Camshaft rearranging device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5326321A (en) | 1992-06-25 | 1994-07-05 | Chang Ping Lung | Adjusting device for adjusting the instantaneous relative angular difference between two rotating members |
JP3392514B2 (ja) | 1993-05-10 | 2003-03-31 | 日鍛バルブ株式会社 | エンジンのバルブタイミング制御装置 |
US5592909A (en) | 1994-03-18 | 1997-01-14 | Unisia Jecs Corporation | Camshaft phase changing device |
US5803030A (en) | 1997-01-10 | 1998-09-08 | Cole; Kenneth Wade | Phase adjustable cam drive |
US6167854B1 (en) | 1999-04-01 | 2001-01-02 | Daimlerchrysler Corporation | Two-part variable valve timing mechanism |
US6199522B1 (en) | 1999-08-27 | 2001-03-13 | Daimlerchrysler Corporation | Camshaft phase controlling device |
-
2005
- 2005-11-16 US US12/085,206 patent/US8443774B2/en active Active - Reinstated
- 2005-11-16 WO PCT/ES2005/000625 patent/WO2007057479A1/es active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB347806A (en) * | 1929-03-30 | 1931-05-07 | Georges Boulet | Improvements in means for adjusting the valve gears of internal combustion engines |
US4976229A (en) * | 1990-02-12 | 1990-12-11 | Siemens Automotive L.P. | Engine camshaft phasing |
US5860328A (en) * | 1995-06-22 | 1999-01-19 | Chrysler Corporation | Shaft phase control mechanism with an axially shiftable splined member |
US6352060B1 (en) * | 1998-05-04 | 2002-03-05 | Paul Jospeh Bentley | Variable timing poppet valve apparatus |
US6640760B1 (en) * | 2002-05-17 | 2003-11-04 | Pedro A. Plasencia | Camshaft rearranging device |
Also Published As
Publication number | Publication date |
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US20090223471A1 (en) | 2009-09-10 |
US8443774B2 (en) | 2013-05-21 |
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