CN106837459A - A kind of mechanical IC engine camshaft variable valve timing mechanism - Google Patents
A kind of mechanical IC engine camshaft variable valve timing mechanism Download PDFInfo
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- CN106837459A CN106837459A CN201710202310.5A CN201710202310A CN106837459A CN 106837459 A CN106837459 A CN 106837459A CN 201710202310 A CN201710202310 A CN 201710202310A CN 106837459 A CN106837459 A CN 106837459A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—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
- F01L1/34406—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 the helically teethed sleeve being located in the camshaft driving pulley
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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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- 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)
- Valve Device For Special Equipments (AREA)
Abstract
The invention belongs to technical field of engines, and in particular to a kind of mechanical IC engine camshaft variable valve timing mechanism, the valve-control for overcoming prior art presence immobilizes or can not flexibly change the shortcoming of air gate distribution phase.Mechanism mainly includes camshaft main body system, camshaft phase control system and camshaft dynamical system；Camshaft main body system is connected by rest pad, pin a and pin b with camshaft phase control system；Camshaft dynamical system is engaged with sleeve spline by axle sleeve with camshaft phase control system and is connected, and camshaft dynamical system is connected by bushing core hole inner spiral groove a and helicla flute b with camshaft main body system with the cooperation of pin a and pin b；Camshaft phase control system is by driving stepper motor.The continuous variable of the achievable air gate distribution phase of the present invention, control is flexible；Simple structure, easily manufactured, low cost, it is easy to promote；The charging efficiency of engine can be improved, engine power performance and economy is effectively improved.
Description
Technical field
The invention belongs to technical field of engines, and in particular to a kind of mechanical IC engine camshaft variable valve timing machine
Structure.
Background technology
Valve actuating mechanism is one of important component of internal combustion engine, and it carries realizes engine each cylinder inlet and outlet
The open and close timing of door and the important function of the control valve stroke characteristics of motion, are to realize engine breathing process, it is ensured that internal combustion
The working cycles of machine heat to power output are able to the basis for constantly going on of going round and beginning again.Therefore, engine whether can reliably working,
Can its dynamic property and economy be protected, the close phase of selection of the port timing with valve actuating mechanism in scavenging period is realized
Close.Traditional engine is fixed due to structure, and in engine operation process, port timing is changeless, and it is in hair
After carrying out lot of experiments under the various different operating modes of motivation, a kind of compromise proposal chosen is designed, be typically only capable to ensure at certain
One operating mode makes the best performance of internal combustion engine, it is impossible to while taking into account the requirement of each operating mode, be extremely difficult to real optimal port timing.
Obviously, this inferior position prevented its from meet at this stage to engine high-efficiency rate, low oil consumption, low emission general requirement.Therefore,
In order to meet different port timing demand under different operating modes, internal combustion engine economy and dynamic property are improved, reduce hazardous emission,
Need using changeable air valve technology.Changeable air valve technology can realize valve stroke from zero to most according to the change of engine conditions
The continuous variable of big design lift and port timing.
The content of the invention
It is an object of the invention to overcome available engine valve-control to immobilize or can not flexibly change air gate distribution
The shortcoming of phase, there is provided mechanical IC engine camshaft that is a kind of simple and reliable for structure and can flexibly controlling air gate distribution phase can
Become port timing mechanism.
It is of the invention main by III group of camshaft main body system I, camshaft phase control system II and camshaft dynamical system
Into.
It is characterized in that described camshaft main body system I is main by camshaft 1, cam 2, spacing convex shoulder a3, upper cover plate
A4, spacing convex shoulder b5, lower cover b25 compositions；Wherein spacing convex shoulder a3 and spacing convex shoulder b5 are arranged on the outer surface of camshaft 1；
Upper cover plate a4 and lower cover b25 are placed between spacing convex shoulder a3 and spacing convex shoulder b5, and are coordinated with the gap of camshaft 1, lower cover
B25 is fixed in engine cylinder and covers, and upper cover plate a4 is bolted with lower cover b25；Cam 2 is fixed on camshaft 1, institute
The right side upper and lower both sides of section circumferencial direction of camshaft 1 stated have a pin-and-hole, pin-and-hole b27, pin-and-hole c28.
Described camshaft phase control system II is by rest pad 6, geared sleeve 8, gear a9, flat key 10, motor shaft 11, step
Stepper motor 12, pin a13, positioning steel pin a14, positioning steel pin b21, pin b22, sleeve 23 are constituted；Wherein rest pad 6 is fixed in and starts
On machine cylinder cap, camshaft 1 can be passed through in heart hole therefrom, and camshaft 1 coordinates with the center interporal lacuna of rest pad 6, the outer surface of rest pad 6
It is additionally provided with external screw thread 7；Geared sleeve 8 is sleeved on the convex shoulder of sleeve 23, and the centre bore of geared sleeve 8 is two-part structure, and left section is provided with
Internal thread 24, engages with external screw thread 7, and right section is smooth section, is coordinated with the gap of sleeve 23；Gear a9 passes through flat key 10 and motor shaft
11 are connected, by the rotation of the controlled motor axle 11 of stepper motor 12, and then with the rotation of moving gear a9；The outside of geared sleeve 8 is distributed with
Tooth, engages with gear a9, and the facewidth is more long than the gear a9 facewidth, it is ensured that complete always with gear a9 when geared sleeve 8 is moved axially
Engagement；The centre bore of sleeve 23 coordinates with the gap of camshaft 1, and its centre bore circumferencial direction is provided with helicla flute a30 and helicla flute b31,
The outer surface circumferencial direction of sleeve 23 is provided with pin-and-hole a26, pin-and-hole d29, and positioning steel pin a14 and positioning steel pin b21 are arranged on pin-and-hole a26
In pin-and-hole d29, and interference fit is with pin-and-hole, the outer surface of sleeve 23 is additionally provided with spline.Described pin a13 and pin b22
In the pin-and-hole b27 and pin-and-hole c28 on the right side of camshaft 1, and with pin-and-hole interference fit, sell the upper semisection of a13 and pin b22
It is separately mounted in the helicla flute a30 and helicla flute b31 of sleeve 23, and coordinates with helicla flute gap, can be sent out with helicla flute
Raw relative slip.
Described camshaft dynamical system III is main by spacing convex shoulder c15, upper cover plate b16, spacing convex shoulder d17, gear
B18, axle sleeve 19, lower cover a20 compositions；Wherein spacing convex shoulder c15 and spacing convex shoulder d17 are arranged on the outer surface of axle sleeve 19；On
Cover plate b16 and lower cover a20 are placed between spacing convex shoulder c15 and spacing convex shoulder d17, and are coordinated with the gap of axle sleeve 19, upper cover plate
B16 is bolted with lower cover a20, and lower cover a20 is fixed in engine cylinder and covers；The inner ring of axle sleeve 19 is spline structure,
Be meshed with the outer ring spline of sleeve 23, the outer ring spline of sleeve 23 is more long than the spline of axle sleeve 19, it is ensured that when sleeve 23 is moved axially with
Axle sleeve 19 is at a fully engaged always；Gear b18 is fixed on axle sleeve 19, and is meshed with engine crankshaft gear, is 1 turn of camshaft
It is dynamic that power is provided.
Further when the timing of 1 opposed gear b18 phases of camshaft one, stepper motor 12 does not work, now gear a9 and
Geared sleeve 8 is not rotated, and the position of sleeve 23 is certain, so that pin a13 and pin b22 is in the helicla flute a30 and helicla flute b31 of sleeve 23
Position is certain.When engine operating condition change requires 1 opposed gear b18 phase changes of camshaft, stepper motor 12 works, gear
A9 is rotated, and the geared sleeve 8 that drive is engaged with is rotated, while geared sleeve 8 is rotated, the outer spiral shell of its internal thread 24 and rest pad 6
The length of action of line 7 changes, and drives geared sleeve 8 to move axially, and its moving direction is by the controlled motor axle 11 of stepper motor 12
Rotation direction is controlled；The moving belt moving sleeve 23 of geared sleeve 8 is moved axially, so as to drive pin a13 and pin b22 in sleeve 23
Slided in helicla flute a30 and helicla flute b31, the opposed gear b18 phases of camshaft 1 is changed.
The course of work of apparatus of the present invention is as follows：
Engine operating condition stabilization, port timing constant process：
When engine operating condition stabilization, the opposed gear b18 phases of camshaft 1 are certain, and stepper motor 12 does not work, gear a9
Do not rotated with geared sleeve 8, geared sleeve 8 is certain with respect to the position of rest pad 6, and the axial location of sleeve 23 is certain, and then sells a13 and pin
B22 positions in the helicla flute a30 and helicla flute b31 of sleeve 23 are certain.Now, by engine crankshaft gear driven gear b18
Rotate, the concomitant rotation of camshaft 1 is so as to drive valve motion.
Air gate distribution phase controlling process：
When engine operating condition changes, it is necessary to correspondingly change air gate distribution phase according to working conditions change.Correspondingly
Stepper motor 12 is worked, and controlled motor axle 11 rotates, and band moving gear a9 is rotated, and 8 concomitant rotations are covered with gear a9 meshed gears,
The rotation of geared sleeve 8 drives internal thread 24 to change with the length of action of external screw thread 7 of rest pad 6, and geared sleeve 8 is with respect to the axle of rest pad 6
To movement, thus moved axially with moving sleeve 23, pin a13 and pin b22 is driven while sleeve 23 is moved in the spiral of sleeve 23
Slided in groove a30 and helicla flute b31, the opposed gear b18 of camshaft 1 is turned over a certain angle, so as to change air gate distribution phase.
When port timing reaches requirement, stepper motor 12 is stopped.
Changed according to engine operating condition, the direction that the opposed gear b18 of camshaft 1 is rotated is by the drive motor axle of stepper motor 12
11 rotation direction is controlled.
Compared with prior art the beneficial effects of the present invention are：
1. the continuous variable of air gate distribution phase can be realized, control is flexible；
2. simple structure, easily manufactured, low cost, it is easy to promotes；
3. the charging efficiency of engine can be improved, engine power performance and economy is effectively improved.
Brief description of the drawings
Fig. 1 is the structural representation of mechanical IC engine camshaft variable valve timing mechanism
Fig. 2 is A-A directions section view figure structure schematic representation
Fig. 3 is the structural representation of sleeve 23
Fig. 4 is B-B directions section view figure structure schematic representation
Fig. 5 is C-C directions section view figure structure schematic representation
Wherein, the cam of I, camshaft main bodies system, II, camshaft phases control system, III, camshafts dynamical system 1.
The gear of 5. 7. external screw thread of spacing 6. rest pads of convex shoulder b, 8. geared sleeves of axle 2. 3. spacing convex shoulder a of cam, 4. upper cover plate a 9.
The upper cover plate b of 15. spacing convex shoulder c of the pin positioning steel pin a of a 14. of 12. stepper motor of a 10. flat key, 11. motor shafts 13. 16.
The positioning steel pins of 17. 19. axle sleeves of spacing 18. gear b of convex shoulder d, 20. lower cover a 21. b 22. sells spiral shell in the sleeves 24. of b 23.
The helicla flute b of 30. helicla flute a of line 25. lower cover b, 26. pin-and-hole a, 27. pin-and-hole b, 28. pin-and-hole c, 29. pin-and-hole d 31.
Specific embodiment
1-5 is described in detail to the present invention below in conjunction with the accompanying drawings：
Referring to the drawings 1,2：
The present invention is made up of camshaft main body system I, camshaft phase control system II and camshaft dynamical system III.
Described camshaft main body system I is main by camshaft 1, cam 2, spacing convex shoulder a3, upper cover plate a4, spacing convex shoulder
B5, lower cover b25 are constituted；
Cam 2 is fixed on camshaft 1, drives valve motion；
Spacing convex shoulder a3 and spacing convex shoulder b5 are arranged on the outer surface of camshaft 1, and its effect is the axial direction for limiting camshaft 1
It is mobile；
Upper cover plate a4 and lower cover b25 are placed between spacing convex shoulder a3 and spacing convex shoulder b5, and are matched somebody with somebody with the gap of camshaft 1
Close, it is ensured that camshaft 1 can be rotated freely；
Upper cover plate a4 and lower cover b25 are bolted, and lower cover b25 is fixed in engine cylinder and covers；
The right side upper and lower both sides of section circumferencial direction of camshaft 1 have a pin-and-hole, and pin-and-hole b27, pin-and-hole c28 are pin a13
Installation site is provided with pin b22.
Referring to the drawings 1-5：
Described camshaft phase control system II is by rest pad 6, geared sleeve 8, gear a9, flat key 10, motor shaft 11, step
Stepper motor 12, pin a13, positioning steel pin a14, positioning steel pin b21, pin b22, sleeve 23 are constituted；
Rest pad 6 is fixed in engine cylinder and covers, and camshaft 1 can be passed through in heart hole therefrom, and camshaft 1 and rest pad
6 center interporal lacunas coordinate, it is ensured that camshaft 1 can be rotated freely；
Rest pad 6 is provided with external screw thread 7, is meshed with the internal thread 24 of geared sleeve 8, is that the axial movement of geared sleeve 8 is carried
For guide effect；
Geared sleeve 8 is sleeved on the convex shoulder of sleeve 23, can control the axial movement of sleeve 23；The centre bore of geared sleeve 8 is two
Segmentation structure, left section is provided with internal thread 24, is engaged with the external screw thread 7 of rest pad 6, and right section is smooth section, is matched somebody with somebody with the gap of sleeve 23
Close, it is ensured that sleeve 23 can be rotated freely in it；
The distribution of the outside of geared sleeve 8 is with teeth, is engaged with gear a9, and the facewidth is more long than the gear a9 facewidth, it is ensured that geared sleeve 8 is in axle
It is at a fully engaged always with gear a9 during to movement；
Flat key 10 connects gear a9 and motor shaft 11, and the moment of torsion of motor shaft 11 is passed into gear a9；
The rotation direction of the controlled motor axle 11 of stepper motor 12, so as to control changing for the opposed gear b18 phases of camshaft 1
Become；
The centre bore of sleeve 23 coordinates with the gap of camshaft 1, it is ensured that camshaft 1 can be rotated freely in it；
The centre bore circumferencial direction of sleeve 23 is provided with helicla flute a30 and helicla flute b31, for the slip of pin a13 and pin b22 is provided
Guide effect；
The outer surface circumference of sleeve 23 is provided with pin-and-hole a26, pin-and-hole d29, is that positioning steel pin a14 and positioning steel pin b21 provide peace
Holding position；
The outer surface of sleeve 23 is provided with spline, and the inner ring spline engagement of axle sleeve 19, plays the power and moment of torsion of Transmission gear b18
Effect；
Positioning steel pin a14 and positioning steel pin b21 are arranged in the pin-and-hole a26 and pin-and-hole d29 of sleeve 23, and with pin-and-hole mistake
It is full of cooperation, it is ensured that do not fallen out in the rotation process of sleeve 23；
The axial location of the upper semisection limiting gear set 8 of positioning steel pin a14 and positioning steel pin b21, and can be with Transmission gear
8 axial thrust to the left of set, band moving sleeve 23 is to left movement；
Pin a13 and pin b22 is arranged in the pin-and-hole b27 and pin-and-hole c28 on the right side of camshaft 1, and is matched somebody with somebody with pin-and-hole interference
Close；
The upper semisection for selling a13 and pin b22 is arranged in the helicla flute a30 and helicla flute b31 of sleeve 23, and and helicla flute
Gap coordinates, and relative with helicla flute generation can slide.
Referring to the drawings 1：
Described camshaft dynamical system III is main by spacing convex shoulder c15, upper cover plate b16, spacing convex shoulder d17, gear
B18, axle sleeve 19, lower cover a20 compositions；
Spacing convex shoulder c15 and spacing convex shoulder d17 are arranged on the outer surface of axle sleeve 19, and its effect is the axial direction for limiting axle sleeve 19
It is mobile；
Upper cover plate b16 and lower cover a20 are placed between spacing convex shoulder c15 and spacing convex shoulder d17, and are matched somebody with somebody with the gap of axle sleeve 19
Close, it is ensured that axle sleeve 19 can be rotated freely in it；
Upper cover plate b16 is bolted with lower cover a20, and lower cover a20 is fixed in engine cylinder and covers；
The inner ring of axle sleeve 19 is spline structure, is meshed with the outer ring spline of sleeve 23, and the outer ring spline of sleeve 23 is spent than axle sleeve 19
Bond distance, it is ensured that at a fully engaged always with axle sleeve 19 when sleeve 23 is moved axially；
Gear b18 is fixed on axle sleeve 19, and is meshed with engine crankshaft gear, and power is provided for camshaft 1 is rotated.
With reference to each component of apparatus of the present invention and its installation site relation, the mechanical IC engine camshaft variable valve timing
The technical scheme of mechanism is as follows：
The specific work process of apparatus of the present invention can be divided into the following two kinds situation：
Engine operating condition stabilization, port timing constant process：
When engine operating condition stabilization, the opposed gear b18 phases of camshaft 1 are certain, and stepper motor 12 does not work, gear a9
Do not rotated with geared sleeve 8, geared sleeve 8 is certain with respect to the position of rest pad 6, and the axial location of sleeve 23 is certain, and then sells a13 and pin
B22 positions in the helicla flute a30 and helicla flute b31 of sleeve 23 are certain.Now, engine work power transmission relationship is
Rotated by engine crankshaft gear driven gear b18, power is transferred to 19-sleeve of axle sleeve 23-pin a13 and pin b22-cam
1-cam of axle 2, so as to drive valve motion.
Air gate distribution phase controlling process：
When engine operating condition changes, it is necessary to correspondingly change air gate distribution phase according to working conditions change.Correspondingly
Stepper motor 12 is worked, and controlled motor axle 11 rotates, and band moving gear a9 is rotated, and 8 concomitant rotations are covered with gear a9 meshed gears,
The rotation of geared sleeve 8 drives internal thread 24 to change with the length of action of external screw thread 7 of rest pad 6, and geared sleeve 8 is with respect to the axle of rest pad 6
To movement, thus moved axially with moving sleeve 23, pin a13 and pin b22 is driven while sleeve 23 is moved in the spiral of sleeve 23
Slided in groove a30 and helicla flute b31, the opposed gear b18 of camshaft 1 is turned over a certain angle, so as to change air gate distribution phase.
When port timing reaches requirement, stepper motor 12 is stopped, and completes to change the course of work of air gate distribution phase.According to hair
Motivation working conditions change, the opposed gear b18 of camshaft 1 rotate direction by the drive motor axle 11 of stepper motor 12 rotation direction institute
Control.
Claims (5)
1. a kind of mechanical IC engine camshaft variable valve timing mechanism, is controlled by camshaft main body system I, camshaft phase
System II and camshaft dynamical system III are constituted；It is characterized in that described camshaft main body system I it is main by camshaft (1),
Cam (2), spacing convex shoulder a (3), upper cover plate a (4), spacing convex shoulder b (5), lower cover b (25) compositions；Wherein spacing convex shoulder a (3)
It is arranged on camshaft (1) outer surface with spacing convex shoulder b (5)；Upper cover plate a (4) and lower cover b (25) are placed in spacing convex shoulder a (3)
And spacing convex shoulder b (5) between, and coordinate with camshaft (1) gap, lower cover b (25) is fixed in engine cylinder and covers, upper cover plate
A (4) and lower cover b (25) is bolted；Cam (2) is fixed on camshaft (1)；Camshaft (1) right side section circumference side
A pin-and-hole, pin-and-hole b (27) and pin-and-hole c (28) are had to upper and lower both sides.
2. a kind of mechanical IC engine camshaft variable valve timing mechanism as described in claim 1, it is characterised in that described
Camshaft phase control system II by rest pad (6), geared sleeve (8), gear a (9), flat key (10), motor shaft (11), stepping
Motor (12), pin a (13), positioning steel pin a (14), positioning steel pin b (21), pin b (22), sleeve (23) composition；Wherein rest pad
(6) it is fixed in engine cylinder to cover, camshaft (1) can be passed through in heart hole therefrom, between camshaft (1) and rest pad (6) centre bore
Gap coordinates, and rest pad (6) outer surface is additionally provided with external screw thread (7)；Geared sleeve (8) is sleeved on the convex shoulder of sleeve (23), geared sleeve
(8) centre bore is two-part structure, and left section is provided with internal thread (24), is engaged with external screw thread (7), and right section is smooth section, with sleeve
(23) gap coordinates；Gear a (9) is connected by flat key (10) with motor shaft (11), by stepper motor (12) controlled motor axle
(11) rotation, and then with the rotation of moving gear a (9)；The distribution of geared sleeve (8) outside is with teeth, is engaged with gear a (9), and the facewidth
It is more long than gear a (9) facewidth, it is ensured that at a fully engaged always with gear a (9) when geared sleeve (8) is moved axially；Sleeve (23) center
Hole coordinates with camshaft (1) gap, and its centre bore circumferencial direction is provided with helicla flute a (30) and helicla flute b (31), and sleeve (23) is outward
Surface perimeter is provided with pin-and-hole a (26), pin-and-hole d (29), positioning steel pin a (14) and position steel pin b (21) installed in pin-and-hole a (26) and
In pin-and-hole d (29), and interference fit is with pin-and-hole, sleeve (23) outer surface is additionally provided with spline.
3. a kind of mechanical IC engine camshaft variable valve timing mechanism as described in claim 1 or 2, it is characterised in that institute
In pin-and-hole b (27) and pin-and-hole c (28) of the pin a (13) and pin b (22) for stating on the right side of camshaft (1), and with pin-and-hole mistake
It is full of cooperation, the upper semisection of pin a (13) and pin b (22) is separately mounted to the helicla flute a (30) and helicla flute b (31) of sleeve (23)
It is interior, and coordinate with helicla flute gap, relative with helicla flute generation can slide.
4. a kind of mechanical IC engine camshaft variable valve timing mechanism as described in claim 1, it is characterised in that described
Camshaft dynamical system III it is main by spacing convex shoulder c (15), upper cover plate b (16), spacing convex shoulder d (17), gear b (18), axle
Set (19), lower cover a (20) compositions；Wherein spacing convex shoulder c (15) and spacing convex shoulder d (17) are arranged on axle sleeve (19) outer surface
On；Upper cover plate b (16) and lower cover a (20) are placed between spacing convex shoulder c (15) and spacing convex shoulder d (17), and with axle sleeve (19)
Gap coordinates, and upper cover plate b (16) and lower cover a (20) is bolted, and lower cover a (20) is fixed in engine cylinder and covers；
Axle sleeve (19) inner ring is spline structure, is meshed with sleeve (23) outer ring spline, and sleeve (23) outer ring spline is than axle sleeve (19) flower
Bond distance, it is ensured that at a fully engaged always with axle sleeve (19) when sleeve (23) is moved axially；Gear b (18) is fixed in axle sleeve (19)
On, and be meshed with engine crankshaft gear, provide power for camshaft (1) is rotated.
5. the mechanical IC engine camshaft variable valve timing mechanism of as described in Claims 1-4 any one, it is characterised in that
The timing of camshaft (1) opposed gear b (18) phase one, stepper motor (12) does not work, and now gear a (9) and geared sleeve (8) be no
Rotate, sleeve (23) position is certain, so that helicla flute as (30) and helicla flute b of the pin a (13) and pin b (22) in sleeve (23)
(31) interior position is certain；When engine operating condition change requires camshaft (1) opposed gear b (18) phase change, stepper motor
(12) work, gear a (9) is rotated, the geared sleeve (8) that drive is engaged with is rotated, while geared sleeve (8) is rotated, its interior spiral shell
Line (24) changes with external screw thread (7) length of action of rest pad (6), drives geared sleeve (8) axial movement, its moving direction
Controlled by the rotation direction of stepper motor (12) controlled motor axle (11)；The moving belt moving sleeve (23) of geared sleeve (8) is axially
It is mobile, so as to drive pin a (13) and pin b (22) to be slided in the helicla flute a (30) and helicla flute b (31) of sleeve (23), make convex
Wheel shaft (1) opposed gear b (18) phase changes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202310.5A CN106837459B (en) | 2017-03-30 | 2017-03-30 | Mechanical variable valve timing mechanism of internal combustion engine camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710202310.5A CN106837459B (en) | 2017-03-30 | 2017-03-30 | Mechanical variable valve timing mechanism of internal combustion engine camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837459A true CN106837459A (en) | 2017-06-13 |
| CN106837459B CN106837459B (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710202310.5A Active CN106837459B (en) | 2017-03-30 | 2017-03-30 | Mechanical variable valve timing mechanism of internal combustion engine camshaft |
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| EP2357325A1 (en) * | 2010-02-12 | 2011-08-17 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Internal combustion engine with variable valve device |
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| DE102014209312A1 (en) * | 2014-05-16 | 2015-11-19 | Schaeffler Technologies AG & Co. KG | Camshaft adjusting arrangement, comprising axial securing means of clamping sleeve |
| 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 |
| CN206707791U (en) * | 2017-03-30 | 2017-12-05 | 吉林大学 | A kind of mechanical IC engine camshaft variable valve timing mechanism |
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| US20060185471A1 (en) * | 2005-02-23 | 2006-08-24 | Lawrence Nicholas J | Camshaft assembly |
| CN201627611U (en) * | 2009-12-31 | 2010-11-10 | 万骞 | Continuously variable valve mechanism of internal-combustion engine |
| EP2357325A1 (en) * | 2010-02-12 | 2011-08-17 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Internal combustion engine with variable valve device |
| CN102720592A (en) * | 2012-06-30 | 2012-10-10 | 长城汽车股份有限公司 | Camshaft assembly of engine with variable valve opening duration |
| CN202883031U (en) * | 2012-11-21 | 2013-04-17 | 吉林大学 | Two-level adjustable variable valve mechanism |
| DE102014209312A1 (en) * | 2014-05-16 | 2015-11-19 | Schaeffler Technologies AG & Co. KG | Camshaft adjusting arrangement, comprising axial securing means of clamping sleeve |
| 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 |
| CN206707791U (en) * | 2017-03-30 | 2017-12-05 | 吉林大学 | A kind of mechanical IC engine camshaft variable valve timing mechanism |
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