CN112096474A - Variable wrap angle combined camshaft, engine and automobile - Google Patents
Variable wrap angle combined camshaft, engine and automobile Download PDFInfo
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- CN112096474A CN112096474A CN202010820927.5A CN202010820927A CN112096474A CN 112096474 A CN112096474 A CN 112096474A CN 202010820927 A CN202010820927 A CN 202010820927A CN 112096474 A CN112096474 A CN 112096474A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0203—Variable control of intake and exhaust valves
- F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0471—Assembled camshafts
- F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention relates to a combined camshaft with a variable wrap angle, an engine and an automobile, wherein the combined camshaft with the variable wrap angle comprises a camshaft structure, a combined cam structure and a cam rotation driving structure, wherein the camshaft structure comprises a cam inner shaft and a cam sleeve movably sleeved outside the cam inner shaft; the combined cam structure comprises a plurality of fixed cams arranged on the cam sleeve and a rotating cam structure movably sleeved outside the cam sleeve, the rotating cam structure is connected with the inner shaft of the cam, and the rotating cam structure is positioned between two adjacent fixed cams; the cam rotation driving structure comprises a driving shell arranged at one end of the cam sleeve and a hydraulic rotation driving main body arranged in the driving shell, and the hydraulic rotation driving main body is connected with the cam inner shaft and used for driving the cam inner shaft to rotate relative to the cam sleeve so as to drive the rotating cam structure to rotate; therefore, the valve opening duration can be automatically adjusted, and the actual gas distribution requirement of the engine can be fully met.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a combined camshaft with a variable wrap angle, an engine and an automobile.
Background
At present, the camshaft of a gasoline engine is designed into a fixed wrap angle structure, and the fixed wrap angle represents the fixed valve opening duration and the fixed valve overlap angle; with the further tightening of the requirements on the oil consumption and the emission of the traditional gasoline engine, the technical trends of Atkinson Miller circulation and the like are gradually developed; the engine adopts an Atkinson cycle at medium and low rotating speed and load, and the closing time of the intake valve can be delayed and the expansion ratio of the intake valve can be changed by the larger opening duration of the intake valve; and at high load, the Otto cycle needs to be realized to ensure the dynamic property, and the closing time of the intake valve is required to be advanced.
However, in the related art, the existing camshaft is a single cam, the valve opening duration cannot be automatically adjusted, the requirements of the two cycles cannot be met simultaneously, and meanwhile, the actual gas distribution requirement of an engine cannot be fully met.
Disclosure of Invention
The embodiment of the invention provides a variable wrap angle combined camshaft, an engine and an automobile, which can automatically adjust the starting duration of a valve through switching of a large wrap angle cam and a small wrap angle cam, and can fully meet the actual gas distribution requirement of the engine.
On one hand, the embodiment of the invention provides a combined camshaft with a variable wrap angle, which comprises a camshaft structure, a combined cam structure and a cam rotation driving structure, wherein the camshaft structure comprises a cam inner shaft and a cam sleeve movably sleeved outside the cam inner shaft; the combined cam structure comprises a plurality of fixed cams arranged on the cam sleeve and a rotating cam structure movably sleeved outside the cam sleeve, the rotating cam structure is connected with the inner shaft of the cam, and the rotating cam structure is positioned between two adjacent fixed cams; the cam rotation driving structure comprises a driving shell arranged at one end of the cam sleeve and a hydraulic rotation driving main body arranged in the driving shell, and the hydraulic rotation driving main body is connected with the cam inner shaft and used for driving the cam inner shaft to rotate relative to the cam sleeve so as to drive the rotation cam structure to rotate.
In some embodiments, the rotating cam structure includes a rotating sleeve movably sleeved outside the cam sleeve, and rotating cams disposed at two ends of the rotating sleeve, the rotating sleeve is connected with the inner shaft of the cam, and the rotating cams are in one-to-one correspondence with the fixed cams.
In some embodiments, the cam sleeve has a rotation slot along its circumference, and the rotation sleeve is connected to the inner cam shaft by a connection pin, and the connection pin is located in the rotation slot.
In some embodiments, the connecting pin is inserted through the inner cam shaft, and both ends of the connecting pin are connected to the rotating sleeve.
In some embodiments, the combined cam structure includes a plurality of rotating cam structures movably sleeved outside the cam sleeve, and each rotating cam structure is located between two adjacent fixed cams.
In some embodiments, the hydraulic rotary drive body includes a drive rotor structure disposed in the drive housing, the drive rotor structure being connected with the in-cam shaft; and a hydraulic driving cavity is formed between the driving rotor structure and the driving shell and is used for filling or discharging hydraulic oil so as to drive the driving rotor structure to rotate.
In some embodiments, the hydraulic rotary driving body further comprises a plurality of housing protrusions protruding from the inner side wall of the driving housing in the circumferential direction, and one hydraulic driving cavity is formed between every two adjacent housing protrusions; the driving rotor structure comprises a rotor main body connected with the cam inner shaft and a plurality of stator protrusions protruding from the circumferential direction of the outer wall surface of the rotor main body, and each stator protrusion correspondingly extends into one hydraulic driving cavity.
In some embodiments, the other end of the cam sleeve is sleeved with a support journal, and an oil sealing plug is arranged in the end of the cam sleeve sleeved with the support journal and is positioned at the end of the inner cam shaft.
In another aspect, an embodiment of the present invention provides an engine, including the above-mentioned variable-wrap-angle assembled camshaft, and a cylinder head connected to the variable-wrap-angle assembled camshaft; and an oil inlet oil duct is arranged on the cylinder cover and communicated with an oil feeding oil duct on the combined cam shaft with the variable wrap angle, and the oil inlet oil duct on the cylinder cover is used for conveying hydraulic oil to the driving shell to drive the hydraulic rotation driving main body to rotate.
In another aspect, an embodiment of the present invention provides an automobile including the engine as described above.
The technical scheme provided by the invention has the beneficial effects that: when the hydraulic rotation driving main body drives the inner shaft of the cam to rotate, the inner shaft of the cam connected with the hydraulic rotation driving main body rotates relative to the cam sleeve, and the rotating cam structure is connected with the inner shaft of the cam, so that the rotating cam structure can be driven to rotate by the rotation of the inner shaft of the cam, a plurality of fixed cams arranged on the cam sleeve are kept still, and the rotating cam structure can rotate relative to the fixed cams; at the moment, the rotating cam structure and the fixed cam are staggered by a certain angle, and the state can be regarded as a large-wrap-angle cam state; when the rotating cam structure rotates to coincide with the fixed cam, the state can be regarded as a small wrap angle cam state. Therefore, the variable wrap angle combined camshaft can automatically adjust the valve opening duration through the change of the large and small wrap angle cams, and can fully meet the actual gas distribution requirement of an engine.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic perspective view of a large wrap angle rotation angle according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a small wrap angle rotation angle according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of an explosive structure according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a camshaft structure and a connecting pin according to an embodiment of the present invention;
fig. 6 is a schematic sectional view of a cam rotation driving structure according to an embodiment of the present invention.
In the figure: 1. a camshaft structure; 10. an inner cam shaft; 11. a cam sleeve; 110. rotating the slotted hole; 2. a combination cam structure; 20. a fixed cam; 21. rotating the cam structure; 210. rotating the sleeve; 211. rotating the cam; 3. a cam rotation drive structure; 30. a drive housing; 31. a hydraulic rotation drive body; 310. a hydraulic drive chamber; 311. a rotor body; 312. a stator projection; 4. a connecting pin; 5. a support journal; 50. an oil sealing plug; 6. and (4) an oil feeding channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
See fig. 1, 2; the embodiment of the invention provides a combined camshaft with a variable wrap angle, which comprises a camshaft structure 1, a combined cam structure 2 and a cam rotation driving structure 3; the camshaft structure 1 comprises a cam inner shaft 10 and a cam sleeve 11 movably sleeved outside the cam inner shaft 10; the combined cam structure 2 comprises a plurality of fixed cams 20 arranged on the cam sleeve 11 and a rotating cam structure 21 movably sleeved outside the cam sleeve 11, the rotating cam structure 21 is connected with the cam inner shaft 10, and the rotating cam structure 21 is positioned between two adjacent fixed cams 20; the cam rotation driving structure 3 comprises a driving shell 30 arranged at one end of the cam sleeve 11 and a hydraulic rotation driving body 31 arranged in the driving shell 30, wherein the hydraulic rotation driving body 31 is connected with the cam inner shaft 10 and is used for driving the cam inner shaft 10 to rotate relative to the cam sleeve 11 so as to drive the rotation cam structure 21 to rotate.
Referring to fig. 3 and 4, when the hydraulic rotation driving body 31 drives the cam inner shaft 10 to rotate, so that the cam inner shaft 10 connected with the hydraulic rotation driving body 31 rotates relative to the cam sleeve 11, since the rotating cam structure 21 is connected with the cam inner shaft 10, the rotation of the cam inner shaft 10 can drive the rotating cam structure 21 to rotate, the plurality of fixed cams 20 arranged on the cam sleeve 11 are kept still, and at this time, the rotating cam structure 21 can rotate relative to the plurality of fixed cams 20; meanwhile, as shown in fig. 1, the rotating cam structure 21 is staggered from the fixed cam 20 by a certain angle, and this state can be regarded as a large-wrap-angle cam state; referring also to fig. 2, when the rotating cam structure 21 is rotated to coincide with the fixed cam 20, this state may be considered a small wrap angle cam state. Therefore, the combined camshaft with the variable wrap angle can automatically adjust the starting duration of the valve through switching of the large and small wrap angle cams, and can fully meet the actual gas distribution requirement of an engine.
Optionally, the rotating cam structure 21 includes a rotating sleeve 210 movably sleeved outside the cam sleeve 11, and rotating cams 211 disposed at two ends of the rotating sleeve 210, the rotating sleeve 210 is connected to the cam inner shaft 10, and the rotating cams 211 are in one-to-one correspondence with the fixed cams 20; the rotating sleeve 210 is movably sleeved outside the cam sleeve 11, the rotating sleeve 210 is connected with the cam inner shaft 10, when the cam inner shaft 10 rotates to drive the rotating cam structure 21 to rotate, the rotating sleeve 210 can rotate along with the rotation of the cam inner shaft 10, the rotating cams 211 arranged at two ends of the rotating sleeve 210 can rotate relative to the fixed cams 20, and at the moment, the rotating cams 211 and the fixed cams 20 can be in a mutually staggered and overlapped state.
Referring to fig. 5, in the embodiment of the present application, the cam sleeve 11 is provided with a rotation slot 110 along the circumferential direction thereof, the rotation sleeve 210 is connected with the inner cam shaft 10 through a connecting pin 4, and the connecting pin 4 is located in the rotation slot 110; in order to limit the rotation angle of the rotating cam 211 relative to the fixed cam 20, a rotating slot 110 may be formed in the cam sleeve 11 along the circumferential direction thereof, and the rotating slot 110 may serve as a limit for the rotation of the rotating cam 211; meanwhile, the rotating sleeve 210 is connected with the inner cam shaft 10 through the connecting pin 4, so that the rotating cam 211 can rotate along with the rotation of the inner cam shaft 10, and the connecting pin 4 is positioned in the rotating groove hole 110, so that the rotating angle of the rotating cam 211 can be limited.
Optionally, in order to make the rotation state of the rotating cam 211 rotating along with the rotation of the cam inner shaft 10 smoother, the connecting pin 4 may be inserted into the cam inner shaft 10, and both ends of the connecting pin 4 are connected to the rotating sleeve 210, so that the connecting action of the connecting pin 4 may drive the rotating cam to rotate.
Optionally, the combined cam structure includes a plurality of rotating cam structures 21 movably sleeved outside the cam sleeve 11, and each rotating cam structure 21 is located between two adjacent fixed cams 20; in order to save the production cost and simplify the structure of the combined camshaft with the variable wrap angle, a rotating cam structure 21 can be generally arranged, and then two fixed cams matched with the rotating cam structure 21 are arranged; meanwhile, a plurality of rotating cam structures 21 can be arranged according to needs, and each rotating cam structure 21 is arranged between two adjacent fixed cams 20, so that the design is modularized, and the number of the rotating cam structures 21 and the number of the fixed cams 20 can be changed according to actual requirements.
Referring also to fig. 6, in the present embodiment, the hydraulic rotary drive body 31 includes a drive rotor structure disposed in the drive housing 30, the drive rotor structure being connected to the cam inner shaft 10; a hydraulic driving chamber is formed between the driving rotor structure and the driving housing 30, and the hydraulic driving chamber is used for filling or discharging hydraulic oil to drive the driving rotor structure to rotate.
When hydraulic oil is filled into or drained from the hydraulic driving cavity 310, the driving rotor structure can be driven to rotate, and the driving rotor structure is connected with the cam inner shaft 10, so that the cam inner shaft 10 can be driven to rotate, and further the cam inner shaft 10 can be driven to rotate relative to the cam sleeve 11 to drive the rotating cam structure 21 to rotate, and the states that the rotating cam 211 and the fixed cam 20 are staggered and overlapped with each other are realized.
Optionally, the hydraulic rotation driving body 31 further includes a plurality of housing protrusions protruding from the inner side wall of the driving housing, and a hydraulic driving cavity 310 is formed between every two adjacent housing protrusions; the driving rotor structure comprises a rotor body 311 connected with the cam inner shaft 10, and a plurality of stator protrusions 312 protruding from the circumferential direction of the outer wall surface of the rotor body 311, wherein each stator protrusion 312 correspondingly extends into one hydraulic driving cavity 310; as the hydraulic driving cavity 310 is filled with or drained of hydraulic oil, the hydraulic driving cavity 310 can be formed between every two adjacent shell bulges, so that the hydraulic driving cavity 310 is filled with or drained of hydraulic oil; because the stator bulge 312 is connected with the cam sleeve 11, the rotor body 311 is connected with the cam inner shaft 10, when hydraulic oil is flushed into or discharged from the hydraulic drive cavity 310, the pressure of the hydraulic oil pushes the rotor body 311 to rotate, at the moment, the rotor body 311 rotates relative to the stator bulge 312, the cam inner shaft 10 is further driven to rotate relative to the cam sleeve 11, at the moment, the rotating cam 211 rotates along with the rotation of the cam inner shaft 10, the state that the rotating cam 211 and the fixed cam 20 are mutually staggered and overlapped is realized, and the switching of the large and small wrap angle cams is realized.
Optionally, in order to make the interaction between the camshaft structure 1 and the combined cam structure 2 more stable, a supporting journal 5 may be sleeved at the other end of the cam sleeve 11, an oil sealing plug 50 is disposed in an end of the cam sleeve 11, where the supporting journal 5 is sleeved, the oil sealing plug 50 is located at an end of the cam inner shaft 10, and the oil sealing plug 50 is used to reduce leakage of hydraulic oil.
The combined camshaft with variable wrap angle of the invention is connected with the cam sleeve 11 through the stator bulge 312, the rotor body 311 is connected with the inner shaft 10 of the cam, when the hydraulic driving chamber 310 is filled with or drained of hydraulic oil, the pressure of the hydraulic oil pushes the rotor body 311 to rotate, at this time, the rotor body 311 rotates relative to the stator protrusion 312, thereby driving the cam inner shaft 10 to rotate relative to the cam sleeve 11, and meanwhile, by movably sleeving the rotating sleeve 210 outside the cam sleeve 11, the rotating sleeve 210 is connected with the cam inner shaft 10 through the connecting pin 4, when the rotation of the cam inner shaft 10 can drive the rotation of the rotating cam structure 21, the rotating sleeve 210 can rotate along with the rotation of the cam inner shaft 10, the rotating cams 211 arranged at the two ends of the rotating sleeve 210 can rotate relative to the plurality of fixed cams 20, and at this time, the rotating cams 211 and the fixed cams 20 can be in a state of being staggered and overlapped; when the rotating cam 211 is staggered with a certain angle from the fixed cam 20, the state can be regarded as a large-wrap-angle cam state; when the rotating cam 211 is rotated to coincide with the fixed cam 20, this state can be regarded as a small wrap angle cam state; therefore, the combined camshaft with the variable wrap angle can automatically adjust the starting duration of the valve through switching of the large and small wrap angle cams, and can fully meet the actual gas distribution requirement of an engine. Meanwhile, in order to limit the rotation angle of the rotating cam 211 relative to the fixed cam 20, a rotation slot 110 may be formed in the cam sleeve 11 along the circumferential direction thereof, and the rotation slot 110 may serve as a limit for the rotation of the rotating cam 211.
The invention provides an engine, which comprises the combined camshaft with the variable wrap angle and a cylinder cover connected with the combined camshaft with the variable wrap angle; an oil inlet duct is arranged on the cylinder cover and is communicated with the upper oil duct 6 on the combined cam shaft with the variable wrap angle, and the oil inlet duct on the cylinder cover is used for conveying hydraulic oil into the driving shell 30 to drive the hydraulic rotation driving main body 31 to rotate; through communicating the oil inlet oil duct on the cylinder cover with the oil inlet oil duct 6 on the combined cam shaft with the variable wrap angle, hydraulic oil can be conveyed into the driving shell 30 through the oil inlet oil duct, so that when the hydraulic oil is flushed into or discharged from the hydraulic driving cavity 310, the pressure of the hydraulic oil pushes the rotor main body 311 to rotate, the switching of the cams with the large wrap angle and the small wrap angle is further realized, the automatic adjustment of the valve opening duration is realized, and the actual gas distribution requirement of an engine can be fully met.
The invention also provides an automobile comprising the engine.
In the description of the present invention, it should be noted that the terms "upper", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are intended to be inclusive and mean, for example, that there may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A variable wrap angle assembled camshaft comprising:
the cam shaft structure comprises a cam inner shaft and a cam sleeve movably sleeved outside the cam inner shaft;
the combined cam structure comprises a plurality of fixed cams arranged on the cam sleeve and a rotating cam structure movably sleeved outside the cam sleeve, the rotating cam structure is connected with the inner shaft of the cam, and the rotating cam structure is positioned between two adjacent fixed cams; and the number of the first and second groups,
the cam rotation driving structure comprises a driving shell arranged at one end of the cam sleeve and a hydraulic rotation driving main body arranged in the driving shell, wherein the hydraulic rotation driving main body is connected with the cam inner shaft and is used for driving the cam inner shaft to rotate relative to the cam sleeve so as to drive the rotating cam structure to rotate.
2. The variable-wrap-angle assembled camshaft according to claim 1, wherein the rotating cam structure includes a rotating sleeve movably fitted over the cam sleeve, and rotating cams provided at both ends of the rotating sleeve, the rotating sleeve being connected to the inner shaft of the cam, the rotating cams corresponding to the fixed cams one to one.
3. The variable-wrap angle assembled camshaft according to claim 2, wherein the cam sleeve is formed with a rotation groove along a circumferential direction thereof, and the rotation sleeve is connected to the inner cam shaft by a connecting pin, which is located in the rotation groove.
4. The variable-wrap angle assembled camshaft according to claim 3, wherein the connecting pin is inserted into the inner cam shaft, and both ends of the connecting pin are connected to the rotating sleeve.
5. The variable-wrap-angle assembled camshaft according to claim 1, wherein the assembled cam structure comprises a plurality of rotating cam structures movably fitted over the cam sleeve, each rotating cam structure being located between two adjacent fixed cams.
6. The variable wrap angle camshaft assembly of any one of claims 1 to 5, wherein the hydraulic rotary drive body includes a drive rotor structure disposed in the drive housing, the drive rotor structure being connected to the internal cam shaft;
and a hydraulic driving cavity is formed between the driving rotor structure and the driving shell and is used for filling or discharging hydraulic oil so as to drive the driving rotor structure to rotate.
7. The variable-wrap angle camshaft assembly of claim 6, wherein said hydraulic rotary drive body further includes a plurality of housing bosses protruded circumferentially on an inner side wall of said drive housing, one of said hydraulic drive chambers being formed between each adjacent two of said housing bosses;
the driving rotor structure comprises a rotor main body connected with the cam inner shaft and a plurality of stator protrusions protruding from the circumferential direction of the outer wall surface of the rotor main body, and each stator protrusion correspondingly extends into one hydraulic driving cavity.
8. The variable wrap angle assembled camshaft according to any one of claims 1 to 5, wherein a support journal is fitted to the other end of the cam sleeve, and an oil-sealing plug is provided in an end of the cam sleeve in which the support journal is fitted, the oil-sealing plug being located at an end of the inner cam shaft.
9. An engine comprising the variable-wrap assembled camshaft of any one of claims 1 to 8, and a cylinder head connected to the variable-wrap assembled camshaft;
and an oil inlet oil duct is arranged on the cylinder cover and communicated with an oil feeding oil duct on the combined cam shaft with the variable wrap angle, and the oil inlet oil duct on the cylinder cover is used for conveying hydraulic oil to the driving shell to drive the hydraulic rotation driving main body to rotate.
10. A vehicle comprising an engine as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820927.5A CN112096474B (en) | 2020-08-14 | 2020-08-14 | Variable wrap angle combined camshaft, engine and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820927.5A CN112096474B (en) | 2020-08-14 | 2020-08-14 | Variable wrap angle combined camshaft, engine and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN112096474A true CN112096474A (en) | 2020-12-18 |
| CN112096474B CN112096474B (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010820927.5A Active CN112096474B (en) | 2020-08-14 | 2020-08-14 | Variable wrap angle combined camshaft, engine and automobile |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009037268B3 (en) * | 2009-08-10 | 2011-04-07 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variable valve drive for internal combustion engines for actuating gas exchange valves |
| CN203559944U (en) * | 2013-09-26 | 2014-04-23 | 长城汽车股份有限公司 | Assembled camshaft |
| JP2014227910A (en) * | 2013-05-22 | 2014-12-08 | 富士重工業株式会社 | Variable valve gear for engine |
| CN104727880A (en) * | 2013-12-20 | 2015-06-24 | 现代自动车株式会社 | Valve train layout structure including cam phaser and camshaft-in-camshaft |
| CN105781652A (en) * | 2014-12-24 | 2016-07-20 | 上海汽车集团股份有限公司 | Variable valve timing system with continuously variable valve opening persistent period and control method of variable valve timing system |
-
2020
- 2020-08-14 CN CN202010820927.5A patent/CN112096474B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009037268B3 (en) * | 2009-08-10 | 2011-04-07 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Variable valve drive for internal combustion engines for actuating gas exchange valves |
| JP2014227910A (en) * | 2013-05-22 | 2014-12-08 | 富士重工業株式会社 | Variable valve gear for engine |
| CN203559944U (en) * | 2013-09-26 | 2014-04-23 | 长城汽车股份有限公司 | Assembled camshaft |
| CN104727880A (en) * | 2013-12-20 | 2015-06-24 | 现代自动车株式会社 | Valve train layout structure including cam phaser and camshaft-in-camshaft |
| CN105781652A (en) * | 2014-12-24 | 2016-07-20 | 上海汽车集团股份有限公司 | Variable valve timing system with continuously variable valve opening persistent period and control method of variable valve timing system |
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| Publication number | Publication date |
|---|---|
| CN112096474B (en) | 2022-02-01 |
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