CN107355277A - A kind of engine variable discharge capacity variable lift valve operating mechanism - Google Patents
A kind of engine variable discharge capacity variable lift valve operating mechanism Download PDFInfo
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- CN107355277A CN107355277A CN201710769963.1A CN201710769963A CN107355277A CN 107355277 A CN107355277 A CN 107355277A CN 201710769963 A CN201710769963 A CN 201710769963A CN 107355277 A CN107355277 A CN 107355277A
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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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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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, is related to a kind of engine variable discharge capacity variable lift valve operating mechanism.The present invention is made up of rocking arm, drive shaft, alignment pin a, valve actuation pin, alignment pin b etc.；Oil circuit is provided with drive shaft, can be supplied to low pressure, high pressure liquid force feed；Valve actuation pin is provided with different valve stroke positioning holes to adjust valve stroke；In oil circuit for low-pressure hydraulic oil and alignment pin a and alignment pin b in fixed lift positioning hole when, engine displacement, valve stroke are fixed；When adjusting valve stroke, supply hydraulic oil, when valve actuation pin head part moves to corresponding lift location, switches to low pressure oil, engine is operated with corresponding lift in oil circuit in oil circuit；When adjusting discharge capacity, supply hydraulic oil in oil circuit.The achievable engine variable discharge capacity of the present invention, lift range variable optimize engine working process, and control is flexible；Gasoline engine pumping loss, mechanical loss are effectively reduced, improves charging efficiency, reaches the purpose of energy-saving and emission-reduction.
Description
Technical field
The invention belongs to technical field of engines, and in particular to a kind of engine variable discharge capacity variable lift valve operating mechanism.
Background technology
Due to the severe situation of energy and environment problem, engine, which is faced with, pursues more efficient, energy-saving and environmental protection roads；
Therefore many energy-conserving and emission-cutting technologies arise at the historic moment.Valve actuating mechanism in engine is to realize engine breathing process, ensures internal combustion
The working cycles of machine heat to power output are able to go round and begin again the basis constantly to go on.For internal combustion engine, due to often existing
Operated under partial load condition, coefficient of residual gas is higher, therefore how to improve engine combustion job stability, and it is negative to reduce part
Pumping loss during lotus, quick combustion process is organized, improve efficiency of combustion with regard to particularly important.Therefore, lift range variable technology
Arisen at the historic moment with Variable Displacement Technology.Less valve stroke is used in part load engine, increases the gas by valve
Flow velocity degree, increase turbulence intensity, improve flame propagation velocity and burning velocity, organize quick combustion process；And in engine
Using larger valve stroke during high-speed high-load, farthest to reduce flow resistance, coefficient of charge is improved, raising is started
Dynamic property during machine high speed.In addition, Variable Displacement Technology can within the engine Smaller load when make PSD Partical Shut Down, reduce
Pumping loss, heat transfer loss and mechanical loss, the combination property of engine can be obviously improved.
Engine variable Displacement Technology does not mainly stagnate by stagnation valve and valve oil-break two ways at present, but only breaks
Oil mode can cause triple effect catalytic converter can not normal use the problems such as；The realization of lift range variable technology mainly has can
Become several forms such as cam profile, variable cam driven member and electro-hydraulic driving；The problem of existing mainly has mechanism too complex, makes
Manufacturing cost is obtained to greatly increase；The mechanical component of large amount of complex has been installed additional so that reliability reduces；Air valve drop shock problem is tight
Again etc..
The content of the invention
It is an object of the invention to overcome, small load efficiency is low in existing gasoline engine and valve lifting movement rule is fixed not
The problems such as change, there is provided it is a kind of simple and reliable for structure, and can flexibly control valve stroke and realize the engine variable of cylinder stopping technique
Discharge capacity variable lift valve operating mechanism.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：
A kind of engine variable discharge capacity variable lift valve operating mechanism of the present invention, by spring a1, support bar a2, rocking arm
3rd, connecting pin a4, drive shaft 5, the stifled a6 of oil, block seat a7, guide finger a8, spring b9, guide finger b10, the stifled b11 of oil, alignment pin a12,
Spring c13, block seat b14, valve actuation pin 15, alignment pin b16, spring d17, block seat c18, connecting pin b19, support bar b20, bullet
Spring e21, cylinder cap 22, valve spring 23, valve 24 form；Wherein, support bar a2 and support bar b20 tops respectively with connecting pin a4
It is slidably connected with connecting pin b19, bottom is respectively protruding into the mounting hole opened up on cylinder cap 22, and is also respectively provided with its lower end
Spring a1 and spring e21；Rocking arm 3 is placed between drive shaft 5 and valve 24, and the upper surface of rocking arm 3 is slidably connected with drive shaft 5, under
End face is slidably connected with valve 24；3 left and right both ends of rocking arm are slidably connected on connecting pin a4 and connecting pin b19 respectively；The stifled a6 of oil
It is connected to the stifled b11 of oil by screw thread on the outside of the oil duct b502 opened up in drive shaft 5 and oil duct c506；Block seat a7, block seat
B14 and block seat c18 is threadedly attached in drive pin installation shoulder hole 504, circular hole a508 and the circular hole d511 of drive shaft 5 respectively
Outside；Guide finger a8 and guide finger b10 one end are fixed in the guide finger mounting hole 1502 opened up on valve actuation pin 15, another
End is respectively protruding into guide groove a503 and guide groove b505, and is slidably connected therewith；Spring b9 is placed in block seat a7 and valve actuation
Between pin 15；Spring c13 is placed between alignment pin a12 and block seat b14；Spring d17 is placed between alignment pin b16 and block seat c18；
Alignment pin a12 and alignment pin b16 is opposite to the both sides of valve actuation pin 15；Valve actuation pin 15 is arranged in what is opened up in drive shaft 5
In drive pin installation shoulder hole 504, and it is slidably connected with hole wall, the extended drive shaft 5 in its head is to drive rocking arm 3.
It is characterized in that the described upper surface of rocking arm 3 is provided with export section 301, basic circle section a302, molded line section 303, basic circle section
B304, introduction segment 305.
Described alignment pin a12 and alignment pin b16 is three stage structure, and fluid power acting section a1202 is located at positioning section a
(1201) between spacing section of a1203；Fluid power acting section b1602 is located between positioning section b (1601) and spacing section of b1603；It is fixed
Position section a (1201), fluid power acting section a1202 and spacing section of a1203 three are coaxial；Positioning section b (1601), fluid power acting section
B1602 and spacing section of b1603 three are coaxial.
Described drive shaft 5 be provided with oil duct a501, oil duct b502, guide groove a503, drive pin installation shoulder hole 504,
Guide groove b505, oil duct c506, oil duct d507, circular hole a508, circular hole b509, circular hole c510, circular hole d511；Wherein, oil duct
A501, oil duct b502 and circular hole d511 are sequentially communicated；Guide groove a503 and guide groove b505 is opposed to install shoulder hole in drive pin
504 both sides；Oil duct c506, oil duct d507 and circular hole a508 are sequentially communicated；Circular hole a508, circular hole b509 and circular hole c510, circular hole
D511 is opposed to install the both sides of shoulder hole 504, and circular hole a508, circular hole b509, circular hole c510 and circular hole d511 in drive pin
Axial line overlaps, and vertical with the drive pin installation axial line of shoulder hole 504；Circular hole a508 and circular hole b509 are communicated, fluid power effect
Section a1202 is slidably connected with circular hole a508 hole walls, and positioning section a (1201) and circular hole b509 is slidably connected；Circular hole c510 and circular hole
D511 is communicated, and fluid power acting section a1202 is slidably connected with circular hole d511 hole walls, and positioning section b (1601) and circular hole c510 slides phase
Even.
Described valve actuation pin 15 is provided with circular hole e1501, guide finger mounting hole 1502, lift positioning hole a1503, liter
Journey positioning hole b1504, lift positioning hole c1505；Wherein, circular hole e1501 is located at the afterbody center of valve actuation pin 15, and its
Axial line overlaps with the axial line of valve actuation pin 15；The axial line of guide finger mounting hole 1502 hangs down with the axial line of valve actuation pin 15
Directly；Lift positioning hole a1503, lift positioning hole b1504, lift positioning hole c1505 three aperture are identical, axis parallel, and
It is vertical with the axial line of valve actuation pin 15.
Described spring b9, spring c13 and spring d17 is respectively provided with certain pretightning force when mounted, as oil duct a501 and
Spring force caused by spring c13 and spring d17 can promote determining for alignment pin a12 respectively when oil duct d507 does not supply high pressure liquid force feed
Position section a (1201) and alignment pin b16 positioning section b (1601) stretches on valve actuation pin 15 the lift positioning hole set
In a1503, lift positioning hole b1504 or lift positioning hole c1505；When oil duct a501 and oil duct d507 supply high pressure liquid force feeds
When, spring c13 and spring d17 resistance can be overcome by acting on fluid power acting section a1202 and fluid power acting section b1602 hydraulic coupling
Power so that alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) are fully retracted to circular hole respectively
In b509 and circular hole c510；When alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) do not extend into
When in the lift positioning hole set on valve actuation pin 15, spring force caused by spring b9 is on the one hand on the head of valve actuation pin 15
When not contacted with the upper surface molded line section 303 of rocking arm 3 head of valve actuation pin 15 can be promoted fully extended, on the other hand in valve
The head of drive pin 15 can not but overcome valve spring f24 pretightning force when being contacted with the upper surface molded line section 303 of rocking arm 3, promote gas
Door 24 is opened.
The course of work of apparatus of the present invention is as follows：
When not stagnating valve and valve stroke fixation：Hydraulic oil is low-pressure state in oil duct a501 and oil duct d507, positioning
A12 positioning section a (1201) and alignment pin b16 positioning section b (1601) is sold all the time in the lift positioning hole of valve actuation pin 15
In a1503, lift positioning hole b1504 or lift positioning hole c1505；By head driving rocking arm 3 upper surface of valve actuation pin 15
Molded line section 303 so drive valve 24 move.
When not stagnating valve and valve stroke need to be adjusted：Oil duct a501 and oil duct d507 supply high pressure liquid force feeds are controlled,
Fluid power effect lower spring c13 and spring d17 is compressed, alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b
(1601) exited out of corresponding valve actuation pin 15 lift positioning hole, valve actuation pin 15 moves to the upper surface molded line of rocking arm 3
After section 303, the head extension elongation of valve actuation pin 15 constantly changes under the effect of molded line section 303, when the head of valve actuation pin 15
When extension elongation reaches specified lift, oil duct a501 and oil duct d507 supply low-pressure hydraulic oils are controlled, in spring c13 and spring
Under d17 spring-force driven duals, alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) is promoted to stretch respectively
Enter in the lift positioning hole specified to valve actuation pin 15, engine is operated with corresponding lift.
When stagnating valve：According to engine operating state, oil duct a501 and oil duct d507 supply high pressure liquid force feeds are controlled, are made
The head of valve actuation pin 15 can not drive valve 24 to open.
Compared with prior art the beneficial effects of the present invention are：
1. engine variable discharge capacity variable lift valve operating mechanism provided by the invention can realize variable valve lift, engine
Discharge capacity is variable, and control is flexible；
2. engine variable discharge capacity variable lift valve operating mechanism provided by the invention can take into account property under Different Work Condition of Engine
Can, optimize engine working process, effectively improve engine power performance and economy；
3. engine variable discharge capacity variable lift valve operating mechanism provided by the invention can reduce engine pumping loss, machinery
Loss, improve charging efficiency.Reach the effect of energy-saving and emission-reduction.
4. engine variable discharge capacity variable lift valve operating mechanism structure provided by the invention is simple, easily manufactured, it is easy to push away
Extensively.
Brief description of the drawings
Fig. 1 is the structural representation of engine variable discharge capacity variable lift valve operating mechanism
Fig. 2 is the structural representation of rocking arm 3 in Fig. 1
Fig. 3 is the overlook direction structural representation of rocking arm 3
Fig. 4 is the structural representation of drive shaft 5 in Fig. 1
Fig. 5 is the structural representation of alignment pin a12 in Fig. 1
Fig. 6 is the structural representation of alignment pin b16 in Fig. 1
Fig. 7 is the structural representation of valve actuation pin 15 in Fig. 1
Wherein, the stifled block seat a 8. of a 7. of the oil of 1. spring a, 2. support bar a, 3. 5. drive shafts of Rocker arm 4 connecting pins a 6. are led
To the valve actuation pins of 14. block seat b of stifled b 12. alignment pin a, the 13. spring c of the oil of 9. spring b of pin a, 10. guide finger b 11. 15.
16. the valve bullet of 21. spring e22. cylinder caps of alignment pin b 17. spring d, 18. block seat c, 19. connecting pin b, 20. support bar b 23.
The basic circle section b305. introduction segments 1201. of 302. 303. molded line sections of basic circle section a of the valve 301. of spring 24. export section 304. position
1202. 1203. spacing sections of a of fluid power acting section a, 1601. positioning section b of section a 1602., 1603. spacing sections of b of fluid power acting section b
The oil duct c of 505. guide groove b of the drive pins of 501. oil duct a, 502. oil duct b, 503. guide groove a 504. installation shoulder hole 506.
The guide fingers of 507. oil duct d, 508. circular hole a, 509. circular hole b, 510. circular hole c, 511. circular hole d, 1501. circular hole e 1502. are installed
The lift positioning hole c of hole 1503. lift positioning hole a, 1504. lift positioning hole b 1505.
Embodiment
1-6 is described in detail to the present invention below in conjunction with the accompanying drawings：
Referring to the drawings 1,3,6：
The present invention is by spring a1, support bar a2, rocking arm 3, connecting pin a4, drive shaft 5, the stifled a6 of oil, block seat a7, guide finger
A8, spring b9, guide finger b10, the stifled b11 of oil, alignment pin a12, spring c13, block seat b14, valve actuation pin 15, alignment pin b16,
Spring d17, block seat c18, connecting pin b19, support bar b20, spring e21, cylinder cap 22, valve spring 23, valve 24 form.
Wherein, spring a1 and spring e21 is placed in support bar a2 and support bar b20 bottoms, is support bar a2 and support bar b20
Mobile offer power effect；
Support bar a2 and support bar b20 tops are slidably connected with connecting pin a4 and connecting pin b19 respectively, and bottom is respectively protruding into
In the mounting hole opened up on cylinder cap 22；Support bar a2 and support bar b20 play supporting role to rocking arm 3；
Rocking arm 3 is placed between drive shaft 5 and valve 24, and the upper surface of rocking arm 3 is slidably connected with drive shaft 5, lower surface and gas
Door 24 is slidably connected；3 left and right both ends of rocking arm are slidably connected on connecting pin a4 and connecting pin b19 respectively；
Connecting pin a4 and connecting pin b19 connection support bars a2, support bar b20 and rocking arm 3；
The stifled a6 of oil and the stifled b11 of oil are connected to by screw thread outside the oil duct b502 and oil duct c506 opened up in drive shaft 5
Side, it is sealed；
Block seat a7, block seat b14 and block seat c18 are threadedly attached in the drive pin installation shoulder hole of drive shaft 5 respectively
504th, on the outside of circular hole a508 and circular hole d511, and spring b9, spring c13 and spring d17 are carried out respectively spacing；
Guide finger a8 and guide finger b10 one end are fixed in the guide finger mounting hole 1502 opened up on valve actuation pin 15,
The other end is respectively protruding into guide groove a503 and guide groove b505, and is slidably connected therewith, is carried for the movement of valve actuation pin 15
For guide effect；
Spring b9 is placed between block seat a7 and valve drive pin 15；Spring c13 is placed between alignment pin a12 and block seat b14；
Spring d17 is placed between alignment pin b16 and block seat c18；
Spring b9, spring c13 and spring d17 are respectively provided with certain pretightning force when mounted；
Alignment pin a12 and alignment pin b16 is opposite to the both sides of valve actuation pin 15, and valve stroke can be adjusted；
Valve actuation pin 15 is arranged in the drive pin installation shoulder hole 504 opened up in drive shaft 5, and is slided and connected with hole wall
Connect, the extended drive shaft 5 in its head is to drive rocking arm 3.
Referring to the drawings 1,2：
The described upper surface of rocking arm 3 is provided with export section 301, basic circle section a302, molded line section 303, basic circle section b304, introduction segment
305。
Wherein, the head of valve actuation pin 15 is steadily imported rocking arm 3 by introduction segment 305；
Basic circle section b304 connections introduction segment 305 and molded line section 303, play transitional function；
Molded line section 303 controls the characteristics of motion of valve 24；
Basic circle section a302 connections export section 301 and molded line section 303, play transitional function；
The head of valve actuation pin 15 is steadily exported rocking arm 3 by export section 301.
Referring to the drawings 3,4：
Described alignment pin a12 is three stage structure, including positioning section a (1201), fluid power acting section a1202, spacing section
a1203。
Wherein, fluid power acting section a1202 is located between positioning section a (1201) and spacing section of a1203, and positioning section a
(1201), fluid power acting section a1202 and spacing section of a1203 three are coaxial.
Described alignment pin b16 is three stage structure, including positioning section b (1601), fluid power acting section b1602, spacing section
b1603。
Wherein, fluid power acting section b1602 is located between positioning section b (1601) and spacing section of b1603；Positioning section b (1601),
Fluid power acting section b1602 and spacing section of b1603 three are coaxial.
Positioning section a (1201) and positioning section b (1601) position can control the lift size of valve 24；
Fluid power acting section a1202 and fluid power acting section b1602 can be respectively subjected to hydraulic oil in oil duct c506 and oil duct b502
Pressure effect；
Spacing section of a1203 and spacing section of b1603 carries out spacing to spring c13 and spring d17 respectively.
With reference to attached, 1,5：
Described drive shaft 5 be provided with oil duct a501, oil duct b502, guide groove a503, drive pin installation shoulder hole 504,
Guide groove b505, oil duct c506, oil duct d507, circular hole a508, circular hole b509, circular hole c510, circular hole d511.
Wherein, oil duct a501, oil duct b502 and circular hole d511 are sequentially communicated, and form driving fluid power acting section b1602 oil
Road system；
Guide groove a503 and guide groove b505 is opposed in drive pin installation shoulder hole 504 both sides, respectively guide finger a8 and
Guide finger b10 provides mobile guide effect；
Oil duct c506, oil duct d507 and circular hole a508 are sequentially communicated, and form driving fluid power acting section a1202 oil circuit system
System；
Circular hole a508, circular hole b509 are opposed with circular hole c510, circular hole d511 in drive pin installation shoulder hole 504 both sides, and
Circular hole a508, circular hole b509, circular hole c510 and circular hole d511 axial lines overlap, and install the axle of shoulder hole 504 with drive pin
Heart line is vertical；
Circular hole a508 and circular hole b509 are communicated, and fluid power acting section a1202 is slidably connected with circular hole a508 hole walls, positioning section a
(1201) it is slidably connected with circular hole b509；
Circular hole c510 and circular hole d511 are communicated, and fluid power acting section a1202 is slidably connected with circular hole d511 hole walls, positioning section b
(1601) slide and be connected with circular hole c510.
With reference to attached, 1,6：
Described valve actuation pin 15 is provided with circular hole e1501, guide finger mounting hole 1502, lift positioning hole a1503, liter
Journey positioning hole b1504, lift positioning hole c1505.
Wherein, circular hole e1501 is located at the afterbody center of valve actuation pin 15, and its axial line and the axle of valve actuation pin 15
Heart line overlaps；Circular hole e1501 bottoms carry out spacing to spring b9；
The axial line of guide finger mounting hole 1502 is vertical with the axial line of valve actuation pin 15, is guide finger a8 and guide finger
B10 provides installation site；
Lift positioning hole a1503, lift positioning hole b1504, lift positioning hole c1505 three aperture are identical, and axial line is put down
OK, and vertical with the axial line of valve actuation pin 15, different lift positioning holes controls the lift size of valve 24.
With reference to each component of apparatus of the present invention and its installation site relation, the engine variable discharge capacity variable lift valve operating mechanism
The specific control principle and the course of work of technical scheme are as follows：
Described spring b9, spring c13 and spring d17 is respectively provided with certain pretightning force when mounted, as oil duct a501 and
Spring force caused by spring c13 and spring d17 can promote determining for alignment pin a12 respectively when oil duct d507 does not supply high pressure liquid force feed
Position section a (1201) and alignment pin b16 positioning section b (1601) stretches on valve actuation pin 15 the lift positioning hole set
In a1503, lift positioning hole b1504 or lift positioning hole c1505；When oil duct a501 and oil duct d507 supply high pressure liquid force feeds
When, spring c13 and spring d17 resistance can be overcome by acting on fluid power acting section a1202 and fluid power acting section b1602 hydraulic coupling
Power so that alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) are fully retracted to circular hole respectively
In b509 and circular hole c510；When alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) do not extend into
When in the lift positioning hole set on valve actuation pin 15, spring force caused by spring b9 is on the one hand on the head of valve actuation pin 15
When not contacted with the upper surface molded line section 303 of rocking arm 3 head of valve actuation pin 15 can be promoted fully extended, on the other hand in valve
The head of drive pin 15 can not but overcome valve spring f24 pretightning force when being contacted with the upper surface molded line section 303 of rocking arm 3, promote gas
Door 24 is opened.
When engine does not stagnate valve and valve stroke is fixed：
Hydraulic oil is low-pressure state in oil duct a501 and oil duct d507, alignment pin a12 positioning section a (1201) and alignment pin
B16 positioning section b (1601) determines in lift positioning hole a1503, lift positioning hole b1504 or the lift of valve actuation pin 15 all the time
In the hole c1505 of position；The upper surface molded line section 303 of rocking arm 3 is driven by the head of valve actuation pin 15 and then drives valve 24 to move.
When engine does not stagnate valve and need to adjust valve stroke：
Oil duct a501 and oil duct d507 supply high pressure liquid force feeds are controlled, are pressed in fluid power effect lower spring c13 and spring d17
Contracting, the lift of alignment pin a12 positioning section a (1201) and alignment pin b16 positioning section b (1601) from corresponding valve actuation pin 15
Exited in positioning hole, after valve actuation pin 15 moves to the upper surface molded line section 303 of rocking arm 3, valve drives under the effect of molded line section 303
The dynamic head extension elongation of pin 15 constantly changes, and when the head extension elongation of valve actuation pin 15, which reaches, specifies lift, controls oil duct
A501 and oil duct d507 supply low-pressure hydraulic oils, under spring c13 and spring d17 spring-force driven duals, promote determining for alignment pin a12
Position section a (1201) and alignment pin b16 positioning section b (1601) is respectively protruding into the lift positioning hole that valve actuation pin 15 is specified
Interior, engine is operated with corresponding lift.
When engine need to stagnate valve：
According to engine operating state, oil duct a501 and oil duct d507 supply high pressure liquid force feeds are controlled, make valve actuation pin
15 head can not drive valve 24 to open.
Claims (6)
- A kind of 1. engine variable discharge capacity variable lift valve operating mechanism, by spring a (1), support bar a (2), rocking arm (3), connecting pin The stifled a (6) of a (4), drive shaft (5), oil, block seat a (7), guide finger a (8), spring b (9), guide finger b (10), oil block up b (11), determined Position pin a (12), spring c (13), block seat b (14), valve actuation pin (15), alignment pin b (16), spring d (17), block seat c (18), Connecting pin b (19), support bar b (20), spring e (21), cylinder cap (22), valve spring (23), valve (24) composition；Wherein, prop up Strut a (2) and support bar b (20) top are slidably connected with connecting pin a (4) and connecting pin b (19) respectively, and bottom is respectively protruding into cylinder In the mounting hole opened up on lid (22), and spring a (1) and spring e (21) are also respectively provided with its lower end；Rocking arm (3) is placed in Between drive shaft (5) and valve (24), rocking arm (3) upper surface is slidably connected with drive shaft (5), and lower surface is slided with valve (24) Connection；Rocking arm (3) left and right both ends are slidably connected on connecting pin a (4) and connecting pin b (19) respectively；The stifled a (6) of the oil and stifled b of oil (11) it is connected to by screw thread on the outside of the oil duct b (502) opened up in drive shaft (5) and oil duct c (506)；Block seat a (7), gear Seat b (14) and block seat c (18) is threadedly attached in drive pin installation shoulder hole (504), the circular hole a of drive shaft (5) respectively (508) and on the outside of circular hole d (511)；Guide finger a (8) and guide finger b (10) one end are fixed in what is opened up on valve actuation pin (15) In guide finger mounting hole (1502), the other end is respectively protruding into guide groove a (503) and guide groove b (505), and the company of slip therewith Connect；Spring b (9) is placed between block seat a (7) and valve drive pin (15)；Spring c (13) is placed in alignment pin a (12) and block seat b (14) between；Spring d (17) is placed between alignment pin b (16) and block seat c (18)；Alignment pin a (12) and alignment pin b (16) are opposed In valve actuation pin (15) both sides；Valve actuation pin (15) is arranged in the drive pin installation shoulder hole opened up in drive shaft (5) (504) in, and it is slidably connected with hole wall, the extended drive shaft in its head (5) is to drive rocking arm (3).
- 2. a kind of engine variable discharge capacity variable lift valve operating mechanism as described in claim 1, it is characterised in that described shakes Arm (3) upper surface is provided with export section (301), basic circle section a (302), molded line section (303), basic circle section b (304), introduction segment (305).
- 3. a kind of engine variable discharge capacity variable lift valve operating mechanism as described in claim 1, it is characterised in that described determines Position pin a (12) and alignment pin b (16) is three stage structure, and fluid power acting section a (1202) is located at positioning section a (1201) and spacing Between section a (1203)；Fluid power acting section b (1602) is located between positioning section b (1601) and spacing section of b (1603)；Positioning section a (1201), fluid power acting section a (1202) and spacing section of a (1203) three are coaxial；Positioning section b (1601), fluid power acting section b (1602) and spacing section of b (1603) three is coaxial.
- A kind of 4. engine variable discharge capacity variable lift valve operating mechanism as described in claim 1, it is characterised in that described drive Moving axis (5) is provided with oil duct a (501), oil duct b (502), guide groove a (503), drive pin installation shoulder hole (504), guide groove b (505), oil duct c (506), oil duct d (507), circular hole a (508), circular hole b (509), circular hole c (510), circular hole d (511)；Wherein, Oil duct a (501), oil duct b (502) and circular hole d (511) are sequentially communicated；Guide groove a (503) and guide groove b (505) is opposed is driving Dynamic pin installation shoulder hole (504) both sides；Oil duct c (506), oil duct d (507) and circular hole a (508) are sequentially communicated；Circular hole a (508), Circular hole b (509) is opposed with circular hole c (510), circular hole d (511) to install shoulder hole (504) both sides, and circular hole a in drive pin (508), circular hole b (509), circular hole c (510) and the axial lines of circular hole d (511) four overlap, and install shoulder hole with drive pin (504) axial line is vertical；Circular hole a (508) and circular hole b (509) are communicated, fluid power acting section a (1202) and circular hole a (508) hole wall It is slidably connected, positioning section a (1201) and circular hole b (509) is slidably connected；Circular hole c (510) and circular hole d (511) are communicated, and fluid power is made It is slidably connected with section a (1202) and circular hole d (511) hole wall, positioning section b (1601) slides with circular hole c (510) to be connected.
- A kind of 5. engine variable discharge capacity variable lift valve operating mechanism as described in claim 1, it is characterised in that described gas Door drive pin (15) is provided with circular hole e (1501), guide finger mounting hole (1502), lift positioning hole a (1503), lift positioning hole B (1504), lift positioning hole c (1505)；Wherein, circular hole e (1501) is located at valve actuation pin (15) afterbody center, and its Axial line overlaps with valve actuation pin (15) axial line；The axial line of guide finger mounting hole (1502) and valve actuation pin (15) axle Heart line is vertical；Lift positioning hole a (1503), lift positioning hole b (1504), lift positioning hole c (1505) three aperture are identical, axle Heart line is parallel, and vertical with valve actuation pin (15) axial line.
- A kind of 6. engine variable discharge capacity variable lift valve operating mechanism as described in claim 1, it is characterised in that described bullet Spring b (9), spring c (13) and spring d (17) are respectively provided with certain pretightning force when mounted, as oil duct a (501) and oil duct d (507) spring force caused by spring c (13) and spring d (17) can promote alignment pin a (12) respectively when not supplying high pressure liquid force feed Positioning section a (1201) and alignment pin b (16) positioning section b (1601) stretch on valve actuation pin (15) lift set and determine In position hole a (1503), lift positioning hole b (1504) or lift positioning hole c (1505)；When oil duct a (501) and oil duct d (507) is supplied When being pressed oil to high pressure liquid, spring c can be overcome by acting on fluid power acting section a (1202) and fluid power acting section b (1602) hydraulic coupling (13) and spring d (17) resistance so that alignment pin a (12) positioning section a (1201) and alignment pin b (16) positioning section b (1601) it is fully retracted respectively to circular hole b (509) and circular hole c (510)；As alignment pin a (12) positioning section a (1201) and fixed When position pin b (16) positioning section b (1601) is not extended into the lift positioning hole set on valve actuation pin (15), spring b (9) Caused spring force on the one hand can when valve actuation pin (15) head does not contact with rocking arm (3) upper surface molded line section (303) Promote valve actuation pin (15) head fully extended, on the other hand on valve actuation pin (15) head and rocking arm (3) upper surface type Line segment (303) can not but overcome the pretightning force of valve spring f (24) when contacting, promote valve (24) to open.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710769963.1A CN107355277B (en) | 2017-08-31 | 2017-08-31 | Variable-displacement variable-lift valve mechanism of engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710769963.1A CN107355277B (en) | 2017-08-31 | 2017-08-31 | Variable-displacement variable-lift valve mechanism of engine |
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| CN107355277B CN107355277B (en) | 2023-04-07 |
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