CN105604707B - A kind of device for changing automobile engine compression ratio - Google Patents
A kind of device for changing automobile engine compression ratio Download PDFInfo
- Publication number
- CN105604707B CN105604707B CN201610178850.XA CN201610178850A CN105604707B CN 105604707 B CN105604707 B CN 105604707B CN 201610178850 A CN201610178850 A CN 201610178850A CN 105604707 B CN105604707 B CN 105604707B
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- Prior art keywords
- gears
- axle
- gear
- sleeve
- helicla flutes
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Classifications
-
- 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 discloses a kind of device for changing automobile engine compression ratio, the problem of being intended to overcome prior art construction complexity, the device include bent axle, No. 1 gear, 4 No. 2 gears, 4 No. 3 gears, axle, 10 axle beds, 4 to No. 9 gears, sleeve and 4 rod journal sleeves.Axle 13 is fixed in the underface of bent axle using 10 axle beds, right-hand member of the sleeve set in axle, sleeve engages connection with its lower No. 6 square gear, 4 to No. 9 gears are set with the axle between 2 axle beds, No. 4 are key connection between gear and axle, it is rotation connection between other gears and axle, No. 4 gears, No. 5 gears, No. 7 gears, No. 8 gears, No. 1 gear of No. 9 gears successively and on bent axle, 4 No. 3 gears engagement connections, No. 2 gears engagement connection of rod journal outer end of the little gear of 4 No. 3 gears successively and in bent axle, 4 rod journal sleeve sets are on 4 rod journals, it is key connection between the two.
Description
Technical field
The present invention relates to a kind of variable compression ratio of automobile engine, it more particularly relates to which one kind changes
Become the device of automobile engine compression ratio.
Background technology
Engine igniter pressure in underload is low, the thermal efficiency is low, at this moment needs higher compression ratio；And engine is in height
During load, if engine compression set in advance is bigger, phenomenon of detonation is easily caused.In order to solve these problems, pressure-variable
Compression ratio engine arises at the historic moment.Most of engine gone into operation on current market is all fixed compression ratio, and in some pressure-variables
It is general to employ mobile cylinder cap, using the side such as adjustable height piston or a set of linkage of design in compression ratio engine more
Case.The mobile existing formed product of cover type, and confirm that variable compression ratio engine can significantly save oil consumption, but mobile cover type
Variable compression ratio engine moving parts it is big while increase the complexity of the cam of driving valve and power output shaft, mesh
Before have no large-scale promotion.Change the scheme of depth pistion by hydraulic pressure, because piston is the part of a high-speed motion, reliably
Ground sets the difficulty of fluid pressure line very big.In general, these scenario-frames are more complicated, and to existing engine modification
It is larger, thus difficulty of processing is high, is not easy to largely go into operation.
The content of the invention
The technical problems to be solved by the invention are to overcome the problem of complicated existing for prior art, there is provided one
Kind changes the device of automobile engine compression ratio.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：
A kind of device of described change automobile engine compression ratio include bent axle, 5 structure identical main shaft neck seats,
No. 1 gear, No. 2 gears of 4 structure identicals, No. 3 gears of 4 structure identicals, axle, 10 structure identical axle beds, No. 4 teeth
Wheel, No. 5 gears, No. 6 gears, No. 7 gears, No. 8 gears, No. 9 gears, sleeve and 4 structure identical rod journal sleeves.
Described bent axle is fixed in the cylinder block of engine by 5 structure identical main shaft neck seats；
Described axle using every group 2 totally 5 groups of 10 axle beds be fixed in the underface of bent axle, the axis of rotation and bent axle of axle
Axis of rotation it is parallel, for sleeve set in the right-hand member of axle, sleeve engages connection, No. 4 gears, No. 5 teeth with No. 6 gears below
Wheel, No. 7 gears, No. 8 gears, No. 9 gears are equably sleeved on the axle between every group of 2 axle beds on the left of sleeve successively, No. 4
Be key connection between gear and axle, No. 5 gears, No. 7 gears, No. 8 gears, No. 9 be all rotation connection between gear and axle, No. 4
No. 1 gear successively and on bent axle of gear, No. 5 gears, No. 7 gears, No. 8 gears, No. 9 gears, 4 structure identicals
No. 3 gear engagements connect, and the little gear on No. 3 gears of 4 structure identicals is identical with 4 structures in bent axle successively
Rod journal outer end No. 2 gears engagement connection, 4 structure identical rod journal sleeve sets are in 4 structure identicals
It is key connection between 4 structure identical rod journal sleeves and 4 structure identical rod journals on rod journal.
No. 3 collars of 2 structure identicals to play the role of positioning are set with the axle of sleeve both sides described in technical scheme,
No. 1 collar to play the role of positioning, No. 3 gears of 4 structure identicals are set with the crankshaft front end in bent axle on the left of No. 1 gear
It is fixed to be set with No. 2 trunnions of 3 structure identicals and 1 No. 3 trunnion between 4 structure identical main shaft neck seats
No. 2 collars of position effect.
Every group 2 described in technical scheme totally 5 groups of 10 axle beds be sleeved on keyway on axle, No. 1 helicla flute, 2 successively
The both sides of number helicla flute, No. 3 helicla flutes and No. 4 helicla flutes, No. 5 gears, No. 7 gears, No. 8 gears and No. 9 gear centre hole walls
On round key be sequentially arranged in No. 1 helicla flute, No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes, No. 5 gears, No. 7 teeth
Round key on wheel, No. 8 gears, No. 9 gear centre hole walls successively with No. 1 helicla flute, No. 2 helicla flutes, No. 3 helicla flutes and No. 4
It is to be slidably connected between helicla flute.
No. 3 gears described in technical scheme are i.e. by little gear and the stacked tower tooth formed of gear wheel by two gears
Wheel, little gear and gear wheel rotation conllinear, little gear is identical with the modulus of No. 2 gears, and little gear engages company with No. 2 gears
Connect；The reference diameter of gear wheel on No. 3 gears is equal with the reference diameter of No. 5 gears of engagement connection, No. 5 gears and
No. 7 gears being together mounted on an axle, No. 8 gears, the structure of No. 9 gears are identical.
Axle described in technical scheme is the straight-bar class formation part for waiting circle cross-section, and the left end of axle is axially disposed No. 4
Keyway, the right-hand member of axle from left to right and it is circumferentially arranged have installation No. 3 collars No. 1 collar groove and No. 2 collar grooves, the key of left end
Equably it is provided with 4 structure identical helicla flutes, i.e. No. 1 spiral shell between groove and No. 1 collar groove of right-hand member from left to right vertically
Spin slot, No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes, No. 1 helicla flute, No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes
Width and No. 5 gears, No. 7 gears, No. 8 gears it is equal with the diameter of the round key on No. 9 gear centre hole walls, No. 1 spiral
Groove, No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes are the deep trouth such as wide that helical angle is 35 °, on axle vertically by it is left extremely
The left end of No. 4 helicla flutes is provided with for ease of the groove of No. 5 gears of installation, No. 7 gears, No. 8 gears and No. 9 gears.
Sleeve described in technical scheme is axially inside provided with manhole, on the outer circumference surface of sleeve equably
Perpendicular tooth is distributed with, i.e., perpendicular tooth is to arrange round and round on outer circumference surface, and the distance between perpendicular tooth of any two adjacent rings is equal,
The modulus of perpendicular tooth is identical with the modulus of No. 6 gears；Described rod journal sleeve is cylindrical structure part, rod journal sleeve
Axially inside setting one and cylinder out-of-alignment cylindrical hole.
Bent axle described in technical scheme turns built-up crankshaft using existing 4；It includes crankshaft front end, No. 1 crank, 3
No. 2 individual No. 2 cranks of structure identical, No. 3 cranks of 3 structure identicals, No. 4 cranks, No. 1 trunnion, 3 structure identicals masters
Axle journal, No. 3 trunnions, 4 structure identical rod journals；It is axially disposed on described crankshaft front end to have a keyway, song
The right-hand member of axle front end and the left end of trunnion are affixed, and the right-hand member of trunnion is again affixed with the left side of crank；The outer end of crank is set
A blind hole is equipped with, the outer end of 3 structure identical cranks is provided with through hole, 3 structure identical cranks and 3 structure identicals
The left end of trunnion is fixedly connected；On 3 structure identical cranks set two blind holes, i.e. a big-diameter blind hole and one it is small blind
Hole, two blind holes are located at the both ends of crank while also are located at the both sides of crank, and big-diameter blind hole is the one end for installing trunnion, small blind hole
It is one end of installing connecting rods axle journal, the other end of 4 structure identical rod journals loads 3 structure identical cranks and No. 3
In through hole on crank, the left end of No. 3 cranks and No. 3 trunnions is affixed, and the right-hand member of No. 3 trunnions is used for Flywheel.
Compared with prior art the beneficial effects of the invention are as follows：
1. a kind of device for changing automobile engine compression ratio of the present invention can realize the continuous variable of compression ratio
Regulation；
2. a kind of apparatus structure for changing automobile engine compression ratio of the present invention is simple, control is flexible；
3. a kind of device for changing automobile engine compression ratio of the present invention is because employ the dress of variable compression ratio
Put, it is possible to achieve in underload using higher compression ratio；And relatively low compression ratio can be used in high load capacity, therefore carry
The high dynamic property and economy of engine.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is a kind of structural representation of device for changing automobile engine compression ratio of the present invention；
Fig. 2 is the diagrammatic cross-section of structure composition at A-A in Fig. 1；
Fig. 3 is the diagrammatic cross-section of structure composition at B-B in Fig. 1；
Fig. 4 is the diagrammatic cross-section of structure composition at C-C in Fig. 1；
Fig. 5 is No. 5 gear structures employed in a kind of device for changing automobile engine compression ratio of the present invention
The shaft side projection drawing of composition；
In figure：1. crankshaft front end, 2.1 number key grooves, No. 3.1 collars, No. 4.1 gears, 5.2 number key grooves, No. 6.1 cranks, 7.2
Number gear, 8.3 number key grooves, No. 9.3 gears, No. 10.2 collars, 11. main shaft neck seats, No. 12.1 trunnions, 13. axles, 14. axle beds,
No. 15.4 gears, 16.4 number key grooves, No. 17.5 gears, No. 18.1 helicla flutes, No. 19.3 collars, No. 20.6 gears, 21. sleeves,
22. rod journal sleeve, 23. keys, 24. rod journals, 25. round keys, 26. grooves, No. 27.7 gears, No. 28.8 gears, 29.9
Number gear, No. 30.2 trunnions, No. 31.2 cranks, No. 32.3 cranks, No. 33.4 cranks, No. 34.3 trunnions, 35. flywheels.
Embodiment
The present invention is explained in detail below in conjunction with the accompanying drawings：
A kind of device for changing automobile engine compression ratio of the present invention is utilized on the rod journal 24 of bent axle
Suit one and rod journal 24 decentraction but the mode of the rod journal sleeve 22 of bias realizes engine compression ratio
It is variable, provide power by the transmission step by step of gear for variable compression ratio device of automobile engine during implementation, and
And the defects of complicated in the prior art can be avoided, only need the less change of original engine can be completed to process variable
Compression ratio engine.A kind of variable compression ratio engine of the present invention is past including at least one cylinder and in the cylinder
The piston moved again, piston are connected by connecting rod with bent axle.
Refering to Fig. 1, a kind of device for changing automobile engine compression ratio of the present invention includes bent axle, No. 1 collar
3rd, No. 3 gears of 7,4 structure identicals of No. 2 gears of 4,4 structure identicals of No. 1 gear No. 2 collars of 9,4 structure identicals
10th, 13,10, axle structure identical axle bed 14,4 gear 15, the 5 structure identical of gear 17,2,19, No. 6 teeth of No. 3 collars
20,4 gears of gear 27,8 of structure identical key 23,7,28, No. 9 gears 29, sleeve 21 and 4 structure identicals are taken turns to connect
Bar journalling sleeve 22.
Described bent axle is for the ease of installing and casting employs existing 4 and turns built-up crankshaft；Described bent axle includes
31,3 structure identicals of No. 2 cranks of 6,3, No. 1 crank structure identical of crankshaft front end 1,1,32,1 No. 4 songs of No. 3 cranks
The structure identical of No. 1 trunnion 30, the 3 structure identical connecting rod of No. 3 trunnions 34,4 of No. 2 trunnions 12,1 of handle 33,1
Axle journal 24.
The left end of crankshaft front end 1 is axially disposed a keyway 2, the right-hand member of crankshaft front end 1 and the left end of trunnion 30
It is affixed.The right-hand member of trunnion 30 is again affixed with the left side of crank 6 simultaneously.
A blind hole is provided with the right side of the outer end of crank 6.And the outer end of 3 structure identical cranks 31 be provided with it is logical
Hole, 3 structure identical cranks 31 are fixedly connected with the left end of 3 structure identical trunnions 12.3 structure identical cranks
Two blind holes, i.e. a big-diameter blind hole and a small blind hole on 32 be present, the both ends that two blind holes are located at crank 32 also are located at simultaneously
The both sides of crank 32, big-diameter blind hole therein are the one end for installing trunnion 12, and another small blind hole is installing connecting rods axle journal 24
One end, another (right side) end of 4 structure identical rod journals 24 load on 3 structure identical cranks 31 and No. 3 cranks 33
Through hole in.The left end of No. 3 cranks 33 and No. 3 trunnions 34 is affixed, and the right-hand member of No. 3 trunnions 34 is to Flywheel 35.
No. 1 described gear 4 is identical with No. 4 reference diameters of gear 15, and No. 1 gear 4 engages connection with No. 4 gears 15, and 1
Number gear 4 reversely rotates at the same speed with No. 4 gears 15.
No. 3 described gears 9 are i.e. by little gear and the stacked cluster gear formed of gear wheel, little gear by two gears
With gear wheel rotation conllinear, little gear is identical with the modulus of No. 2 gears 7, and little gear engages connection with No. 2 gears 7；No. 3
The big reference diameter of gear wheel on gear 9 is equal with the reference diameter of No. 5 gears 17 of engagement connection, No. 5 gears 17
And radially mounted have on the inwall of the centre bore for No. 7 gears 27, No. 8 gears, 28, No. 9 gears 29 being together arranged on axle 13
Round key 25；
No. 3 gears 9 are intermediate transfer gear, and thereon without keyway, and the gear wheel on No. 3 gears 9 is advised with No. 5 gears 17
Lattice are identical；No. 3 gears 9 can freely rotate in the circumference of trunnion 12.Axial direction is fixed by No. 2 collars 10 to it.No. 3
The effect of gear 9 is that the moment of torsion on No. 5 gears 17 is delivered on No. 2 gears 7.
Described axle 13 is the straight-bar class formation part for waiting circle cross-section, and the left end of axle 13 is axially disposed 4 number key grooves 16,
The right-hand member of axle 13 is circumferentially provided with No. 1 collar groove and No. 2 collar grooves of No. 3 collars 19 of two installations, left end from left to right
Keyway and right-hand member No. 1 collar groove between be equably provided with 4 structure identical helicla flutes from left to right vertically, i.e., 1
Number 18, No. 2 helicla flutes of helicla flute, No. 3 helicla flutes and No. 4 helicla flutes, the width and No. 5 centre bores of gear 17 of No. 1 helicla flute 18
On round key 25 diameter it is equal, No. 1 helicla flute 18 be helical angle be 35 ° it is wide wait deep trouth, on axle 13 vertically by
The left left end to No. 4 helicla flutes is provided with for ease of No. 5 28, No. 9 gears 29 of gear of gear 27,8 of gear 17,7 of installation
Groove 26.
Axle 13 is arranged on the underface of bent axle, axis of rotation and the song of axle 13 using 5 groups of 10 structure identical axle beds 14
The axis of rotation of axle is parallel.
The inside of described sleeve 21 for etc. circular section through hole, its inner surface is slidably matched with axle 13；The both ends of sleeve 21
Two No. 3 collars 19 of installation, realize axially position of the sleeve 21 on axle 13 in collar groove on axle 13；Sleeve 21 it is cylindrical
Perpendicular tooth is evenly distributed on side face, the perpendicular tooth is not the continuous tooth form of traditional spiral, and the tooth form is to be interrupted and do not deposit
In spiral angle, i.e., perpendicular tooth is circumferentially in arrangement of enclosing the land.The modulus of its perpendicular tooth is identical with the modulus of No. 6 gears 20.
Described rod journal sleeve 22 is cylindrical structure part, the axially inside setting of cylinder one and cylinder
Body out-of-alignment cylindrical hole.
No. 1 described collar 3 serves the effect of axially position to No. 1 gear 4, prevents No. 1 gear 4 from occurring axially to alter
It is dynamic.
No. 2 described collars 10 serve the effect of axially position to No. 3 gears 9, prevent No. 3 gears 9 from occurring axially to alter
It is dynamic.
5 described structure identical main shaft neck seats 11 are fixed in the cylinder block of engine, and support is played to bent axle
Effect, while can prevent bent axle from axial float occurs.
The cylinder block of totally 5 groups of 10 one end of axle bed 14 and engine is affixed by described every group 2, to axle 13 play support and
The effect of axially position；The other end of every group 2 totally 5 groups of 10 axle beds 14 is sleeved on keyway, No. 1 helicla flute on axle 13 successively
18th, the both sides of No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes, 17, No. 7 teeth of No. 5 gears between 2 axle beds 14
Wheel 27, No. 8 gears 28 and No. 9 center hole walls of gear 29 on round key 25 be sequentially arranged at 18, No. 2 helicla flutes of No. 1 helicla flute,
In No. 3 helicla flutes and No. 4 helicla flutes, every group 2 totally 5 groups of 10 axle beds 14 cause No. 4 gears of gear 17,7 of gear 15,5
27th, relative motion is not present relative to body in 28, No. 9 gears 29 of No. 8 gears in the axial direction.
The number key groove 2 of crankshaft front end 1 and 1 is to connect axial workpiece, makes that torsion can be transmitted between bent axle and subsidiary body
Square, externally drive the subsidiary body of engine.
No. 1 gear 4 realizes common rotation with being provided with the bent axle of 2 number key grooves 5 using key connection, No. 1 gear 4 and 4
Number gear 15 is meshed, and the moment of torsion of bent axle is delivered into No. 4 gears 15 by No. 1 gear 4, and rotate with moving axis 13.Wherein, 1
Number the left end of gear 4 has carried out axial restraint by collar 3, right-hand member has carried out axial restraint by the trunnion 30 on multi-diameter shaft.
No. 2 gears 7 are rotated to an angle by the key rod journal 24 on 3 number key grooves 8 and rod journal sleeve 22,
Further change the position of stop above and below piston, to adjust the size of compression ratio.The axial location of No. 2 gears 7 is by crank 31 and 3
Number gear 9 limits jointly.
Axle 13 drives rotation by No. 4 gears 15 by the key on 4 number key grooves 16, and then axle 13 drives No. 5 gears 17 to carry out
Rotate.When No. 5 gears 17 are assembled on axle 13, the round key 25 on No. 5 center hole walls of gear 17 is passed through into the groove 26 on axle 13
It is installed on helicla flute 18.Round key 25 on No. 5 gears 17 can slide in helicla flute 18.
Refering to Fig. 1 and Fig. 5, No. 5 gears 17 and axle 13 are coaxially connected, and wherein round key 25 and No. 5 gears 17 is affixed, No. 5
Slided in helicla flute 18 of the round key 25 on axle 13 on gear 17, helicla flute 18 is that round key 25 provides guiding and positioning
Effect.
The axial location of No. 5 gears 17 is fixed, and when axial displacement occurs for axle 13, No. 5 gears 17 can revolve around axle 13
Turn an angle, and compression ratio is adjusted by this angle.
Refering to Fig. 2, rod journal sleeve 22 is connected with rod journal 24 by key 23 so that when rod journal 24 rotates
When, it can be rotated together with drivening rod journalling sleeve 22.
The axial location of rod journal 24 is limited jointly by rod journal sleeve 22, key 23 and crank 6.During assembling, first will
One end of rod journal 24 is put into the blind hole of crank 6, then key 23 is put into the keyway of rod journal 24, then in pitman shaft
Rod journal sleeve 22 is put on neck 24, and rod journal 24 is carried to No. 2 cranks 31 of through hole through opposite side.Such connecting rod
The axial location of axle journal 24 is just limited jointly by rod journal sleeve 22,23, No. 1 cranks 6 of key and No. 2 cranks 31.
Refering to Fig. 1 and Fig. 4, No. 3 collars 19 carry out axially position to sleeve 21, ensure that axle 13 and sleeve 21 in the axial direction may be used
To move jointly.
No. 6 gears 20 are driven by stepper motor, while are meshed with sleeve 21, its axis direction and the axial direction of sleeve 21
It is perpendicular.When No. 6 gears 20 rotate, axial displacement occurs jointly for sleeve 21 and axle 13.
The annexation of sleeve 21 and axle 13 is illustrated in Fig. 4, axle 13 can freely rotate in sleeve 21.
Described axle 13 using every group 2 totally 5 groups of 10 axle beds 14 be fixed in the underface of bent axle, the axis of rotation of axle 13
Parallel with the axis of rotation of bent axle, sleeve 21 is sleeved on the right-hand member of axle 13, and positioning has been set with the axle 13 of the both sides of sleeve 21 and has been made
No. 3 collars 19 of 2 structure identicals, sleeve 21 engage connection, 15, No. 5 teeth of No. 4 gears with No. 6 gears 20 below
17, No. 7 gears 29 of gear 28,9 of gear 27,8 of wheel be equably sleeved on successively the left side of sleeve 21 every group of 2 axle beds 14 it
Between axle 13 on, be key connection between No. 4 gears 15 and axle 13, No. 5 28, No. 9 gears of gear of gear 27,8 of gear 17,7
Be all between 29 and axle 13 rotation connection, No. 4 gear 27,8 of gear 17,7 gears 29 of gear 28,9 of gear 15,5 according to
Secondary and on bent axle the structure identical 3 of No. 1 gear 4,4 gear 9 engagement connects, before the bent axle in No. 1 left side of gear 4
The little gear on No. 1 collar No. 3 gears 9 of 3,4 structure identicals to play the role of positioning is set with end 1 successively and installed in song
No. 2 gears 7 engagement connection of 4 outer ends of structure identical rod journal 24 in axle, 4 structure identical rod journal sleeves
22 are sleeved on 4 structure identical rod journals 24,4 structure identical rod journal sleeves 22 and 4 structure identicals
It is key connection between rod journal 24,3 between No. 3 gears 9 of 4 structure identicals and 4 structure identical main shaft neck seats 11
No. 2 collars 10 to play the role of positioning are set with individual No. 2 trunnions 12 of structure identical and 1 No. 3 trunnion 34.
A kind of operation principle for the device for changing automobile engine compression ratio：
By taking a cylinder of engine as an example；When piston is located at top dead centre, the axis of rod journal sleeve 22 is located at rod journal
On the downside of 24 axis, and during the distance maximum of in the vertical direction two axial lines, the position of piston than uninfluenced mechanism more on the lower,
This make it that the volume Vc of combustion chamber is maximum；When bent axle further turns over 180 ° of crank angles, piston is located at lower dead center, rod journal
The axis of sleeve 22 is located on the upside of the axis of rod journal 24, and during the distance maximum of in the vertical direction two axial lines, piston
Position is more top than the mechanism of bias, and this make it that cylinder total volume Va is minimum.ε=Va/Vc is defined according to compression ratio, pressure now
Contracting is than minimum.
When piston is located at top dead centre, and the axis of rod journal sleeve 22 is located on the upside of the axis of rod journal 24, and
On vertical direction during the distance maximum of two axial lines, the position of piston is more top than uninfluenced mechanism, and this causes the appearance of combustion chamber
Product Vc is minimum；When bent axle further turns over 180 ° of crank angles, and piston is located at lower dead center, the axis position of rod journal sleeve 22
In the downside of the axis of rod journal 24, and during the distance maximum of in the vertical direction two axial lines, the position ratio of piston is not eccentric
Mechanism more on the lower, this make it that cylinder total volume Va is maximum.ε=Va/Vc is defined according to compression ratio, compression ratio now is maximum.
By the displacement continuous variable of stepper motor axle 13 in the axial direction, therefore the compression of variable compression ratio engine
Than can between maximum and minimum value stepless variable.
Claims (7)
1. a kind of device for changing automobile engine compression ratio, includes bent axle and 5 structure identical main shaft neck seats (11), bent
Axle is fixed in the cylinder block of engine by 5 structure identical main shaft neck seats (11), it is characterised in that described one kind changes
The device for becoming automobile engine compression ratio also includes No. 1 gear (4), No. 2 gears (7) of 4 structure identicals, 4 structure phases
No. 3 gears (9) together, No. 2 collars (10) of 4 structure identicals, axle (13), 10 structure identical axle beds (14), No. 4 gears
(15), No. 5 gears (17), No. 6 gears (20), No. 7 gears (27), No. 8 gears (28), No. 9 gears (29), sleeve (21) and 4
Individual structure identical rod journal sleeve (22)；
Described axle (13) using every group 2 totally 5 groups of 10 axle beds (14) be fixed in the underface of bent axle, the gyroaxis of axle (13)
Line is parallel with the axis of rotation of bent axle, and sleeve (21) is sleeved on the right-hand member of axle (13), sleeve (21) and No. 6 gears below
(20) engagement connection, No. 4 gears (15), No. 5 gears (17), No. 7 gears (27), No. 8 gears (28), No. 9 gears (29) are uniform
Ground is sleeved on the axle (13) between every group of 2 axle beds (14) on the left of sleeve (21) successively, No. 4 gears (15) and axle (13) it
Between be key connection, be all between No. 5 gears (17), No. 7 gears (27), No. 8 gears (28), No. 9 gears (29) and axle (13) turn
Dynamic connection, No. 4 gears (15), No. 5 gears (17), No. 7 gears (27), No. 8 gears (28), No. 9 gears (29) are successively and installation
No. 3 No. 1 gear (4), 4 structure identicals gear (9) engagement connections on bent axle, No. 3 gears (9) of 4 structure identicals
On No. 2 gears (7) engagements of 4 structure identical rod journal (24) outer ends of the little gear successively and in bent axle connect
Connect, 4 structure identical rod journal sleeves (22) are sleeved on 4 structure identical rod journals (24), and 4 structures are identical
Rod journal sleeve (22) and 4 structure identical rod journals (24) between be key connection.
2. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described sleeve
(21) No. 3 collars (19) of 2 structure identicals to play the role of positioning are set with the axle (13) of both sides, on the left of No. 1 gear (4)
No. 1 collar (3) to play the role of positioning, No. 3 gears (9) of 4 structure identicals and 4 are set with crankshaft front end (1) in bent axle
On No. 2 trunnions (12) of 3 structure identicals and 1 No. 3 trunnion (34) between individual structure identical main shaft neck seat (11)
It is set with No. 2 collars (10) to play the role of positioning.
3. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described every group
2 totally 5 groups of 10 axle beds (14) be sleeved on keyway, No. 1 helicla flute (18), No. 2 helicla flutes, No. 3 spirals on axle (13) successively
The both sides of groove and No. 4 helicla flutes, No. 5 gears (17), No. 7 gears (27), No. 8 gears (28) and No. 9 gear (29) center hole walls
On round key (25) be sequentially arranged in No. 1 helicla flute (18), No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes, No. 5 teeth
Take turns (17), No. 7 gears (27), No. 8 gears (28), the round key (25) on No. 9 gear (29) center hole walls successively with No. 1 spiral
It is to be slidably connected between groove (18), No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes.
4. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described No. 3
Gear (9) is to be stacked the cluster gear formed, little gear and gear wheel gyroaxis by little gear and gear wheel by two gears
Line is conllinear, and little gear is identical with the modulus of No. 2 gears (7), and little gear engages connection with No. 2 gears (7)；On No. 3 gears (9)
The reference diameter of gear wheel is equal with the reference diameter of No. 5 gears (17) of engagement connection, No. 5 gears (17) and a Tongan City
No. 7 gears (27), No. 8 gears (28) on axle (13), the structure of No. 9 gears (29) are identical.
5. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described axle
(13) it is the straight-bar class formation part of grade circle cross-section, the left end of axle (13) is axially disposed 4 number key grooves (16), the right side of axle (13)
End is circumferentially provided with No. 1 collar groove and No. 2 collar grooves of No. 3 collars (19) of installation, keyway and the right side of left end from left to right
4 structure identical helicla flutes, i.e. No. 1 helicla flute are equably provided with from left to right vertically between No. 1 collar groove at end
(18), No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes, No. 1 helicla flute (18), No. 2 helicla flutes, No. 3 helicla flutes and No. 4 spiral shells
The width of spin slot and No. 5 gears (17), No. 7 gears (27), No. 8 gears (28) and the cylinder on No. 9 gear (29) center hole walls
The diameter of key (25) is equal, and No. 1 helicla flute (18), No. 2 helicla flutes, No. 3 helicla flutes and No. 4 helicla flutes are that helical angle is 35 °
It is wide to wait deep trouth, it is provided with vertically by a left side to the left end of No. 4 helicla flutes for ease of installing No. 5 gears (17), 7 on axle (13)
Number gear (27), the groove (26) of No. 8 gears (28) and No. 9 gears (29).
6. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described sleeve
(21) be axially inside provided with manhole, be evenly distributed perpendicular tooth on the outer circumference surface of sleeve (21), i.e., perpendicular tooth exists
It is to arrange round and round on outer circumference surface, the distance between perpendicular tooth of any two adjacent rings is equal, erects the modulus and No. 6 gears of tooth
(20) modulus is identical；
Described rod journal sleeve (22) is cylindrical structure part, axially inside setting one of rod journal sleeve (22)
Individual and cylinder out-of-alignment cylindrical hole.
7. according to a kind of device of change automobile engine compression ratio described in claim 1, it is characterised in that described bent axle
Built-up crankshaft is turned using existing 4；It includes No. 2 crankshaft front end (1), No. 1 crank (6), 3 structure identicals cranks
(31), No. 2 No. 3 cranks (32) of 3 structure identicals, No. 4 cranks (33), No. 1 trunnion (30), 3 structure identicals main shafts
Neck (12), No. 3 trunnions (34), 4 structure identical rod journals (24)；
It is axially disposed on described crankshaft front end (1) to have a keyway (2), right-hand member and the trunnion (30) of crankshaft front end (1)
Left end it is affixed, the right-hand member of trunnion (30) is again affixed with the left side of crank (6),
The outer end of crank (6) is provided with a blind hole, and the outer end of 3 structure identical cranks (31) is provided with through hole, 3 structure phases
Same crank (31) is fixedly connected with the left end of 3 structure identical trunnions (12)；Set on 3 structure identical cranks (32)
Two blind holes, i.e. a big-diameter blind hole and a small blind hole are put, two blind holes are located at the both ends of crank (32) while also are located at crank
(32) both sides, big-diameter blind hole are the one end for installing trunnion (12), and small blind hole is one end of installing connecting rods axle journal (24), and 4 are tied
The other end of structure identical rod journal (24) is fitted into the through hole on 3 structure identical cranks (31) and No. 3 cranks (33),
The left end of No. 3 cranks (33) and No. 3 trunnions (34) is affixed, and the right-hand member of No. 3 trunnions (34) is used for Flywheel (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178850.XA CN105604707B (en) | 2016-03-26 | 2016-03-26 | A kind of device for changing automobile engine compression ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178850.XA CN105604707B (en) | 2016-03-26 | 2016-03-26 | A kind of device for changing automobile engine compression ratio |
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| CN105604707A CN105604707A (en) | 2016-05-25 |
| CN105604707B true CN105604707B (en) | 2018-02-09 |
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| CN201610178850.XA Expired - Fee Related CN105604707B (en) | 2016-03-26 | 2016-03-26 | A kind of device for changing automobile engine compression ratio |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107201945A (en) * | 2017-07-21 | 2017-09-26 | 泸州职业技术学院 | A kind of variable compression ratio engine |
| CN113653563B (en) * | 2021-08-19 | 2023-05-16 | 东风汽车集团股份有限公司 | Driving connection structure of variable compression ratio mechanism |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09158750A (en) * | 1995-12-12 | 1997-06-17 | Matsukuma Yutaka | Engine device and power transmission |
| JP2013096348A (en) * | 2011-11-04 | 2013-05-20 | Honda Motor Co Ltd | Compression ratio varying mechanism for internal combustion engine |
| KR101382318B1 (en) * | 2012-12-17 | 2014-04-10 | 기아자동차 주식회사 | Variable compression ratio device and internal combustion engine using the same |
| DE102013014090A1 (en) * | 2013-08-27 | 2015-03-05 | Dr. Ing. H.C. F. Porsche Ag | Internal combustion engine and connecting rod |
| CN205422955U (en) * | 2016-03-26 | 2016-08-03 | 吉林大学 | Change device that automobile engine pressed scaling |
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