CN107084046A - A kind of returnning formula variable compression ratio - Google Patents
A kind of returnning formula variable compression ratio Download PDFInfo
- Publication number
- CN107084046A CN107084046A CN201710473417.3A CN201710473417A CN107084046A CN 107084046 A CN107084046 A CN 107084046A CN 201710473417 A CN201710473417 A CN 201710473417A CN 107084046 A CN107084046 A CN 107084046A
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- lock pin
- pin
- hole
- bent axle
- spring
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- 230000006835 compression Effects 0.000 title claims abstract description 56
- 238000007906 compression Methods 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 99
- 239000010720 hydraulic oil Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/047—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of variable crankshaft position
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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
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
- F02D2700/03—Controlling by changing the compression ratio
Abstract
The invention belongs to technical field of engines, and in particular to a kind of returnning formula variable compression ratio.The present invention is made up of bent axle, connecting rod, connecting rod cap, lock pin etc.；Bent axle is built-up crankshaft, it is made up of the left body of bent axle, crank-pin and the right body of bent axle, crank-pin is to be equipped with a circle locking pin-and-hole on three-stage eccentric stepped shaft structure, every section of axle, oil duct is respectively equipped with the left body of bent axle, connecting rod and the right body of bent axle, hydraulic oil or low pressure oil can be passed through；When in oil duct being low pressure oil, lock pin a and lock pin b are respectively enterd in locking pin-and-hole a and locking pin-and-hole b, and lock pin c is separated with locking pin-and-hole c, and now compression ratio is constant；When in oil duct being hydraulic oil, lock pin a and lock pin b are separated with locking pin-and-hole a and locking pin-and-hole b respectively, and lock pin c enters in locking pin-and-hole c, now can adjust compression ratio；The achievable compression ratio continuously adjustabe of the present invention, control is flexible；Simple in construction, easily manufactured, reliability is high, it is easy to promote.
Description
Technical field
The invention belongs to technical field of engines, and in particular to a kind of returnning formula variable compression ratio.
Background technology
Increasingly serious energy crisis and Abgasgesetz makes conventional engines face increasingly stern challenge.Dynamic property,
The synthesis raising of economy and discharge performance is to conventional engines requirement and challenge.Can not to solve conventional engines
Take into account simultaneously efficiently, energy-conservation, the composite request of low row this technical barrier, changeable compression ratio technique arises at the historic moment, this technology
The thermal efficiency, the fuel consumption and emission characteristic of engine can be improved well.
Compression ratio refers to the degree that engine mixed gas body is compressed, after the cylinder total volume before compression and compression
Volume of cylinder is the ratio between combustion chamber volume to represent.Compression ratio has many influences on engine performance.Compression ratio is higher, heat
Efficiency is higher, but increasing with compression ratio, and thermal efficiency increasing degree is less and less；The too high compression pressure, most of making of compression ratio simultaneously
High combustion pressure is raised, and declines combustion engine mechanical efficiency.Compression ratio changes the change for having an effect on discharge of harmful matter of internal combustion engine
Change.Effectively it compensate for turbocharging in addition, changeable compression ratio technique is combined with turbocharging technology and do not worked in middle and slow speed of revolution
Weakness.With the change of load, the electrodeless regulation of compression ratio is realized, the potentiality of engine can be excavated to greatest extent, are made
It can effectively improve the thermal efficiency in whole condition range, and then improve the combination property of engine.
The realization of current variable compression ratio of engines technology mainly has improvement cylinder head, piston and combustion chamber, crankshaft-link rod
Several forms such as component, the Railway Project existed, which mainly has, has carried out the change of large amount of complex to cylinder head so that manufacturing cost
Greatly increase；The mechanical component of large amount of complex has been installed additional so that reliability is reduced.In addition, mechanism wear, compression ratio conversion
The problems such as control accuracy, mechanical energy loss is all very intractable.
The content of the invention
It is an object of the invention to the problem and deficiency for overcoming above-mentioned variable compression ratio of engines technology, there is provided a kind of structure
Simply, reliable operation, R＆D costs are low, a kind of small returnning formula variable compression ratio is integrally changed to engine.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：
A kind of returnning formula variable compression ratio of the present invention is main by the left body of bent axle (1), locking pin-and-hole a
(2), snap ring a (3), crank-pin (4), sealing ring a (5), oil pocket a (6), lock pin a (7), spring a (8), lock pin mounting hole a
(9), oil duct a (10), oil duct b (11), lock pin mounting hole b (12), spring b (13), lock pin b (14), oil pocket b (15), close
Seal b (16), snap ring b (17), locking pin-and-hole b (18), the right body of bent axle (19), locking pin-and-hole c (20), oil duct c (21), connecting rod
(22), connecting rod cap (23), oil pocket c (24), lock pin c (25), spring c (26), lock pin mounting hole c (27), snap ring c (28) group
Into.
It is characterized in that described bent axle is built-up crankshaft, by the left body of bent axle (1), crank-pin (4) and the right body of bent axle
(19) constitute；Crank-pin (4) is the symmetrical multidiameter structure of three-stage, and two sections of left and right axis is overlapped and with interlude axis not same
On one horizontal line, n size identical locking pin-and-hole a (2), stage casing are machined with left section of outer surface circumference of crank-pin (4)
M size identical locking pin-and-hole c (20) is machined with the circumference of outer surface, n size phase is machined with right section of outer surface circumference
Same locking pin-and-hole b (18)；Lock pin mounting hole a (9) and oil duct a (10) are machined with the left body of bent axle (1), in the right body of bent axle
(19) oil duct b (11) and lock pin mounting hole b (12) are machined with；Oil duct c (21) and lock are machined with described connecting rod (22)
Shotpin mounting hole c (27)；Described lock pin a (7), lock pin b (14) and lock pin c (25) base is cylindrical structure,
Head is circular rod-shaped configuration.
Described crank-pin (4) the connection left body of bent axle (1) and the right body of bent axle (19), left section and right section point of crank-pin (4)
In the pin-and-hole for not being put into the left body of bent axle (1) and the right body of bent axle (19), coordinate with pin-and-hole gap, and by snap ring a (3) and snap ring
B (17) carries out spacing.
The lock pin that described sealing ring a (5), lock pin a (7), spring a (8) are installed on the left body of bent axle (1) is installed
In hole a (9), wherein spring a (8) is fixed in lock pin mounting hole a (9) bottom, lock pin a (7) bases and spring a (8) upper end
Contact and lock pin a (7) head axes are in locking pin-and-hole a (2) section, sealing ring a (5) inner ring is enclosed on lock pin a (7) head
Portion, and be fixed at lock pin mounting hole a (9) opening, constituted between sealing ring a (5) lower sections and lock pin a (7) base close
The annular oil cavity a (6) closed, and oil duct a (10) communicates with oil pocket a (6)；Spring b (13), lock pin b (14), sealing ring b
(16) it is installed in the lock pin mounting hole b (12) on the right body of bent axle (19) Nei, wherein spring b (13) is fixed in lock pin installation
Hole b (12) bottom, lock pin b (14) bases and spring b (13) upper-end contacts and lock pin b (14) head axes are in locking pin-and-hole
In b (18) section, sealing ring b (16) inner ring is enclosed on lock pin b (14) head, and is fixed at the opening of circular hole b (12), sealing
Closed annular oil cavity b (15), and oil duct b (11) and oil pocket b are constituted below circle b (16) between lock pin b (14) base
(15) communicate.
Described connecting rod (22) and connecting rod cap (23) is bolted, and connecting rod (22) and connecting rod cap (23) are arranged on
On the middle shaft part of crank-pin (4), and coordinate with the intersegmental gap of jackshaft, can relatively rotate；Lock pin c (25), spring c
(26), snap ring c (28) is installed in the lock pin mounting hole c (27) on connecting rod (22) Nei, wherein lock pin c (25) head axes
In locking pin-and-hole c (20) section, spring c (26) is enclosed on lock pin c (25), and top is spacing by lock pin c (25) base,
Bottom is spacing by snap ring c (28), and closed circle is constituted between lock pin c (25) bases and lock pin mounting hole c (27) bottom
Oil pocket c (24) and oil duct c (21) is communicated with oil pocket c (24).
The course of work of apparatus of the present invention is as follows：
When engine compression ratio is not adjusted, from oil duct a (10), oil duct b (11) and oil duct c (21) respectively to oil pocket a
(6) low pressure oil, is passed through in oil pocket b (15) and oil pocket c (24), now spring a (8), spring b (13) and spring c (26) effect
Power is all higher than low pressure oil liquid pressure, and lock pin a (7) and lock pin b (14) are respectively in spring a (8) and spring b (13) active force
It is moved into upwards down in locking pin-and-hole a (2) and locking pin-and-hole b (18), and lock pin c (25) is in the active force of spring c (26)
Lower motion upwards is separated with locking pin-and-hole c (20)；Under this state, crank-pin (4) and the left body of bent axle (1) and the right body of bent axle (19) are solid
One is connected in, crank-pin (4) can not be rotated relative to the left body of bent axle (1) and the right body of bent axle (19), and compression ratio keeps constant.
When engine compression ratio changes, by oil duct a (10), oil duct b (11) and oil duct c (21) respectively to oil pocket a
(6) hydraulic oil, is passed through in oil pocket b (15) and oil pocket c (24), now the hydraulic coupling of hydraulic oil is all higher than spring a (8), spring b
(13) and spring c (26) active force, lock pin a (7) and lock pin b (14) the compression spring a under the pressure of hydraulic oil respectively
(8) and spring b (13) and locking pin-and-hole a (2) and locking pin-and-hole b (18) are departed from, and lock pin c (25) is under the pressure of hydraulic oil
Compression spring c (26) simultaneously enters in lock pin hole c (20)；Under this state, crank-pin (4) fixes as one with connecting rod (22), and
Separated with the left body of bent axle (1) and the right body of bent axle (19), during crank rotation, drive crank-pin (4) relative by connecting rod (22)
The left body of bent axle (1) and the right body of bent axle (19) are rotated, so as to change compression ratio.
When compression ratio adjustment is finished, the hydraulic oil in oil duct a (10), oil duct b (11) and oil duct c (21) switches to low pressure
Oil, so that hydraulic oil is changed into low-pressure state, lock pin a (7) and lock in oil pocket a (6), oil pocket b (15) and oil pocket c (24) again
Shotpin b (14) reenters locking pin-and-hole a (2) and locking pin-and-hole b under spring a (8) and spring b (13) active force respectively
(18) in, and lock pin c (25) is separated under the active force of spring c (26) with locking pin-and-hole c (20), and engine compression ratio is again
Keep constant, thus complete first compression than adjustment process.
Compared with prior art the beneficial effects of the present invention are：
1. a kind of returnning formula variable compression ratio that the present invention is provided can realize multi-stage compression than adjustment process, control
System is flexible；
2. a kind of returnning formula variable compression ratio that the present invention is provided can take into account performance under Different Work Condition of Engine,
Optimize engine working process, effectively improve the thermal efficiency of engine, improve engine performance；
3. a kind of returnning formula variable compression ratio that the present invention is provided is simple in construction, small to engine modification, into
This is low, easily manufactured, it is easy to promote；
4. a kind of returnning formula variable compression ratio that the present invention is provided utilizes the work in crankshaft-link rod rotation process
Firmly as power source, the drive device without additional excessively complexity, functional reliability is high.
Brief description of the drawings
Fig. 1 is the structural representation of returnning formula variable compression ratio
Fig. 2 be in Fig. 1 structural representation from A-A to sectional view
Fig. 3 be in Fig. 1 structural representation from B-B to sectional view
Wherein, the left lockings of 2. 6. oil pocket a of locking pin-and-hole a 3. snap ring a, 4. crank-pin, 5. sealing ring a of body 7. of 1. bent axles
The spring b 14. of 9. 12. lock pin mounting hole b of lock pin mounting hole 10. oil duct a of a, 11. oil duct b of pin 8. spring a of a 13. lock
The right locking pin-and-hole c 21. of body 20. of bent axle of 18. locking pin-and-hole b of shotpin b 15. oil pocket b, 16. sealing ring b, 17. snap ring b 19.
The snap rings of 27. lock pin mounting hole c of oil duct c 22. connecting rod, 23. connecting rod cap, 24. oil pocket c, 25. lock pin c, 26. spring c 28.
c
Embodiment
1-3 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 by the left body of bent axle (1), locking pin-and-hole a (2), snap ring a (3), crank-pin (4), sealing ring a (5), oil pocket a
(6), lock pin a (7), spring a (8), lock pin mounting hole a (9), oil duct a (10), oil duct b (11), lock pin mounting hole b
(12), spring b (13), lock pin b (14), oil pocket b (15), sealing ring b (16), snap ring b (17), locking pin-and-hole b (18), bent axle
Right body (19), locking pin-and-hole c (20), oil duct c (21), connecting rod (22), connecting rod cap (23), oil pocket c (24), lock pin c (25), bullet
Spring c (26), lock pin mounting hole c (27), snap ring c (28) compositions.
Referring to the drawings 1,3：
Described bent axle is built-up crankshaft, is made up of the left body of bent axle (1), crank-pin (4) and the right body of bent axle (19)；
Crank-pin (4) the connection left body of bent axle (1) and the right body of bent axle (19), left section and right section of crank-pin (4) are respectively put into
In the pin-and-hole of the left body of bent axle (1) and the right body of bent axle (19), coordinate with pin-and-hole gap, and by snap ring a (3) and snap ring b (17)
Progress is spacing, and crankpin (4) can be rotated relative to the left body of bent axle (1) and the right body of bent axle (19)；
Lock pin mounting hole a (9) and oil duct a (10) are machined with the left body of bent axle (1)；Oil is machined with the right body of bent axle (19)
Road b (11) and lock pin mounting hole b (12)；
Crank-pin (4) is the symmetrical multidiameter structure of three-stage, and two sections of left and right axis is overlapped and with interlude axis not same
On one horizontal line, n size identical locking pin-and-hole a (2), stage casing are machined with left section of outer surface circumference of crank-pin (4)
M size identical locking pin-and-hole c (20) is machined with the circumference of outer surface, n size phase is machined with right section of outer surface circumference
Same locking pin-and-hole b (18)；
Described lock pin a (7) and lock pin b (14) base is cylindrical structure, and head is circular rod-shaped configuration；
Sealing ring a (5), lock pin a (7), spring a (8) are installed in the lock pin mounting hole a (9) on the left body of bent axle (1)
It is interior；
Spring a (8) is fixed in lock pin mounting hole a (9) bottom, and spring a (8) can provide for lock pin a (7) motion
Power；
Lock pin a (7) bases and spring a (8) upper-end contacts and lock pin a (7) head axes are cut in locking pin-and-hole a (2)
In face, when lock pin a (7) entrance locking pin-and-hole a (2) are interior, the left body of bent axle (1) and crankpin (4) can be made affixed；
Sealing ring a (5) inner ring is enclosed on lock pin a (7) head, and is fixed at lock pin mounting hole a (9) opening, close
Closed annular oil cavity a (6), and oil duct a (10) and oil pocket a are constituted below seal a (5) between lock pin a (7) base
(6) communicate, oil duct a (10) supply high pressure liquid can be pressed oil or low-pressure hydraulic oil into oil pocket a (6)；
Spring b (13), lock pin b (14), sealing ring b (16) are installed in the lock pin mounting hole on the right body of bent axle (19)
In b (12)；
Spring b (13) is fixed in lock pin mounting hole b (12) bottom, and spring b (13) can be lock pin b (14) motion
Power is provided；
Lock pin b (14) bases and spring b (13) upper-end contacts and lock pin b (14) head axes are in locking pin-and-hole b
(18) in section, when lock pin b (14) entrance locking pin-and-hole b (18) are interior, the right body of bent axle (19) and crankpin (4) can be made affixed；
Sealing ring b (16) inner ring is enclosed on lock pin b (14) head, and is fixed at the opening of circular hole b (12), sealing ring b
(16) closed annular oil cavity b (15), and oil duct b (11) and oil pocket b (15) are constituted between lower section and lock pin b (14) base
Communicate, oil duct b (11) supply high pressure liquid can be pressed oil or low-pressure hydraulic oil into oil pocket b (15)；
Referring to the drawings 1,2：
Oil duct c (21) and lock pin mounting hole c (27) are machined with described connecting rod (22)；
Connecting rod (22) and connecting rod cap (23) are arranged on the middle shaft part of crank-pin (4), and are coordinated with the intersegmental gap of jackshaft,
It can relatively rotate；And it is bolted between connecting rod (22) and connecting rod cap (23)；
Lock pin c (25) base is cylindrical structure, and head is circular rod-shaped configuration；
Lock pin c (25), spring c (26), snap ring c (28) are installed in the lock pin mounting hole c (27) on connecting rod (22)
It is interior；
Lock pin c (25) head axes are in locking pin-and-hole c (20) section, and lock pin c (25) enters locking pin-and-hole c (20)
When interior, connecting rod (22) and crankpin (4) can be made affixed；
Spring c (26) is enclosed on lock pin c (25), and top is spacing by lock pin c (25) base, and bottom is by snap ring c
(28) spacing, spring c (26) can provide power for lock pin c (25) motion；
Closed circular oil pocket c (24), simultaneously is constituted between lock pin c (25) bases and lock pin mounting hole c (27) bottom
And oil duct c (21) is communicated with oil pocket c (24), oil duct c (21) supply high pressure liquid can be pressed oil or low-pressure hydraulic into oil pocket c (24)
Oil；
With reference to each component of apparatus of the present invention and its installation site relation, the technology of the returnning formula variable compression ratio
Scheme 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 is stable, compression ratio constant process：
When engine compression ratio is not adjusted, from oil duct a (10), oil duct b (11) and oil duct c (21) respectively to oil pocket a
(6) low pressure oil, is passed through in oil pocket b (15) and oil pocket c (24), now spring a (8), spring b (13) and spring c (26) effect
Power is all higher than low pressure oil liquid pressure, and lock pin a (7) and lock pin b (14) are respectively in spring a (8) and spring b (13) active force
It is moved into upwards down in locking pin-and-hole a (2) and locking pin-and-hole b (18), and lock pin c (25) is in the active force of spring c (26)
Lower motion upwards is separated with locking pin-and-hole c (20)；Under this state, crank-pin (4) and the left body of bent axle (1) and the right body of bent axle (19) are solid
One is connected in, crank-pin (4) can not be rotated relative to the left body of bent axle (1) and the right body of bent axle (19), and compression ratio keeps constant.
Engine operating condition changes, compression ratio adjustment process：
When engine compression ratio changes, by oil duct a (10), oil duct b (11) and oil duct c (21) respectively to oil pocket a
(6) hydraulic oil, is passed through in oil pocket b (15) and oil pocket c (24), now the hydraulic coupling of hydraulic oil is all higher than spring a (8), spring b
(13) and spring c (26) active force, lock pin a (7) and lock pin b (14) the compression spring a under the pressure of hydraulic oil respectively
(8) and spring b (13) and locking pin-and-hole a (2) and locking pin-and-hole b (18) are departed from, and lock pin c (25) is under the pressure of hydraulic oil
Compression spring c (26) simultaneously enters in lock pin hole c (20)；Under this state, crank-pin (4) fixes as one with connecting rod (22), and
Separated with the left body of bent axle (1) and the right body of bent axle (19), during crank rotation, drive crank-pin (4) relative by connecting rod (22)
The left body of bent axle (1) and the right body of bent axle (19) are rotated, so as to change compression ratio.
When compression ratio adjustment is finished, the hydraulic oil in oil duct a (10), oil duct b (11) and oil duct c (21) switches to low pressure
Oil, so that hydraulic oil is changed into low-pressure state, lock pin a (7) and lock in oil pocket a (6), oil pocket b (15) and oil pocket c (24) again
Shotpin b (14) reenters locking pin-and-hole a (2) and locking pin-and-hole b under spring a (8) and spring b (13) active force respectively
(18) in, and lock pin c (25) is separated under the active force of spring c (26) with locking pin-and-hole c (20), and engine compression ratio is again
Keep constant, thus complete first compression than adjustment process.
Claims (5)
1. a kind of returnning formula variable compression ratio, by the left body of bent axle (1), locking pin-and-hole a (2), snap ring a (3), crank-pin
(4), sealing ring a (5), oil pocket a (6), lock pin a (7), spring a (8), lock pin mounting hole a (9), oil duct a (10), oil duct b
(11), lock pin mounting hole b (12), spring b (13), lock pin b (14), oil pocket b (15), sealing ring b (16), snap ring b (17),
Locking pin-and-hole b (18), the right body of bent axle (19), locking pin-and-hole c (20), oil duct c (21), connecting rod (22), connecting rod cap (23), oil pocket c
(24), lock pin c (25), spring c (26), lock pin mounting hole c (27), snap ring c (28) compositions.
2. a kind of returnning formula variable compression ratio as described in claim 1, it is characterised in that described bent axle is group
Box-like bent axle, is made up of the left body of bent axle (1), crank-pin (4) and the right body of bent axle (19)；Crank-pin (4) is the symmetrical ladder of three-stage
Axle construction, the two sections of axis in left and right overlap and with interlude axis not in the same horizontal line, in left section of outer surface of crank-pin (4)
N size identical locking pin-and-hole a (2) is machined with circumference, m size identical locking is machined with the circumference of stage casing outer surface
N size identical locking pin-and-hole b (18) is machined with pin-and-hole c (20), right section of outer surface circumference；Add on the left body of bent axle (1)
Work has lock pin mounting hole a (9) and oil duct a (10), and oil duct b (11) and lock pin mounting hole are machined with the right body of bent axle (19)
b(12)；Oil duct c (21) and lock pin mounting hole c (27) are machined with described connecting rod (22)；Described lock pin a (7), lock
Shotpin b (14) and lock pin c (25) base are cylindrical structure, and head is circular rod-shaped configuration.
3. a kind of returnning formula variable compression ratio as described in claim 1, it is characterised in that described crank-pin (4)
The left body of bent axle (1) and the right body of bent axle (19) are connected, left section and right section of crank-pin (4) is respectively put into the left body of bent axle (1) and bent axle
In the pin-and-hole of right body (19), coordinate with pin-and-hole gap, and it is spacing by snap ring a (3) and snap ring b (17) progress.
4. a kind of returnning formula variable compression ratio as described in claim 1, it is characterised in that described sealing ring a
(5), lock pin a (7), spring a (8) are installed in the lock pin mounting hole a (9) on the left body of bent axle (1) Nei, wherein spring a (8)
It is fixed in lock pin mounting hole a (9) bottom, lock pin a (7) bases and spring a (8) upper-end contacts and lock pin a (7) head shaft
Line is in locking pin-and-hole a (2) section, and sealing ring a (5) inner ring is enclosed on lock pin a (7) head, and is fixed in lock pin mounting hole a
(9) at opening, closed annular oil cavity a (6), and oil duct are constituted between lock pin a (7) base below sealing ring a (5)
A (10) is communicated with oil pocket a (6)；Spring b (13), lock pin b (14), sealing ring b (16) are installed on the right body of bent axle (19)
In lock pin mounting hole b (12), wherein spring b (13) is fixed in lock pin mounting hole b (12) bottom, lock pin b (14) base
With spring b (13) upper-end contacts and lock pin b (14) head axes in locking pin-and-hole b (18) section, sealing ring b (16) inner ring
Lock pin b (14) head is enclosed on, and is fixed at the opening of circular hole b (12), with lock pin b (14) bottom below sealing ring b (16)
Closed annular oil cavity b (15) is constituted between seat, and oil duct b (11) is communicated with oil pocket b (15).
5. a kind of returnning formula variable compression ratio as described in claim 1, it is characterised in that described connecting rod (22)
It is bolted with connecting rod cap (23), and connecting rod (22) and connecting rod cap (23) are arranged on the middle shaft part of crank-pin (4),
And coordinate with the intersegmental gap of jackshaft, it can relatively rotate；Lock pin c (25), spring c (26), snap ring c (28) are installed in connecting rod
(22) in the lock pin mounting hole c (27) on, wherein lock pin c (25) head axes are in locking pin-and-hole c (20) section, spring
C (26) is enclosed on lock pin c (25), and top is spacing by lock pin c (25) base, and bottom is spacing by snap ring c (28), lock pin
Closed circular oil pocket c (24) is constituted between c (25) bases and lock pin mounting hole c (27) bottom and oil duct c (21) and oil
Chamber c (24) is communicated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710473417.3A CN107084046A (en) | 2017-06-21 | 2017-06-21 | A kind of returnning formula variable compression ratio |
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| CN201710473417.3A CN107084046A (en) | 2017-06-21 | 2017-06-21 | A kind of returnning formula variable compression ratio |
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| CN107084046A true CN107084046A (en) | 2017-08-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590849A (en) * | 2018-01-09 | 2018-09-28 | 西华大学 | A kind of toggle and control method of achievable Miller cycle |
| CN109083707A (en) * | 2018-09-25 | 2018-12-25 | 浙江吉利罗佑发动机有限公司 | Camshaft, engine and automobile for cylinder deactivation of engine |
| US20210332747A1 (en) * | 2020-04-23 | 2021-10-28 | FEV Group GmbH | Connecting rod for changing a compression ratio of an internal combustion engine |
-
2017
- 2017-06-21 CN CN201710473417.3A patent/CN107084046A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590849A (en) * | 2018-01-09 | 2018-09-28 | 西华大学 | A kind of toggle and control method of achievable Miller cycle |
| CN108590849B (en) * | 2018-01-09 | 2023-07-14 | 西华大学 | Crank connecting rod mechanism capable of realizing Miller circulation and control method |
| CN109083707A (en) * | 2018-09-25 | 2018-12-25 | 浙江吉利罗佑发动机有限公司 | Camshaft, engine and automobile for cylinder deactivation of engine |
| US20210332747A1 (en) * | 2020-04-23 | 2021-10-28 | FEV Group GmbH | Connecting rod for changing a compression ratio of an internal combustion engine |
| US11635019B2 (en) * | 2020-04-23 | 2023-04-25 | FEV Group GmbH | Connecting rod for changing a compression ratio of an internal combustion engine |
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