CN100575683C - A kind of engine air valve lift stepless regulating mechanism - Google Patents
A kind of engine air valve lift stepless regulating mechanism Download PDFInfo
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- CN100575683C CN100575683C CN200810030193A CN200810030193A CN100575683C CN 100575683 C CN100575683 C CN 100575683C CN 200810030193 A CN200810030193 A CN 200810030193A CN 200810030193 A CN200810030193 A CN 200810030193A CN 100575683 C CN100575683 C CN 100575683C
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Abstract
The present invention relates to engine air valve lift controlling mechanism field, technical problem to be solved is the defective that overcomes prior art, design a kind of simple in structure, stability is high, the motor lift stepless regulating mechanism of long service life, thereby improve the power of motor and realize fuel-economyization, reduce environmental pollution.Comprise the cam mechanism that the valve mechanism, the end that are arranged on engine cylinder and cover are pressed in rocking arm, the fore-set mechanism on the valve mechanism and drive rocking arm middle part pulley on the structure, the structure of its improvement is that described fore-set mechanism comprises the fore-set sleeve pipe that is opened on the cylinder head, be located at last fore-set, the following fore-set in the fore-set sleeve pipe and be installed in the spring between the fore-set up and down, with the stepless regulating mechanism that fore-set under the support slides up and down in the fore-set sleeve pipe, the other end of last fore-set and rocking arm is hinged.
Description
Technical field
The present invention relates to engine air valve lift controlling mechanism field, say so more specifically and a kind ofly can carry out the valve step-less adjustment, structural good, the engine air valve lift stepless regulating mechanism that the life-span is long.
Background technique
Motor is that certain requirement is arranged to gas distribution system under different working environments, different load.For example motor is when the slow-speed of revolution moves, and intake efficiency is low, and gas flow inertia is little, and excessive valve lift can influence the generation of intake swirl, is unfavorable for fuel oil and Air mixing, causes discharging to exceed standard, and the degradation factor occurs under the engine power.And motor needs bigger valve lift that a large amount of air is entered motor when high rotating speed, because the existence of closure can hinder air to enter motor, engine power is descended, and factors such as fuel economy difference occur.Therefore under different rotating speeds, must select suitable lift engine performance can be maximized.But because motor is very high to the required precision of valve, and adjusted difficulty is very big, therefore on the gas distribution system of present most of piston reciprocating type motors, the lift of valve or immobilize, or changed in stages.
Obviously fixed lift can't be brought into play efficiency of engine, saves the energy.And the structure of classification lift also can only address the above problem to a certain extent, and complex structure, and is very high to the requirement of workpiece, caused can using in the only talented high-grade automobile.In order further to excavate the power of motor, save energy consumption, people begin to design the motor of stepless variation lift.This motor be a little can be according to the height of engine speed, the valve lift of free adjustment motor can adapt with the rotating speed of motor to reach valve lift within the specific limits, gives full play to the power of motor.This mechanism mainly is made of fore-set and the column sleeve that is nested in the fore-set outside, and column sleeve and engine cylinder cover concern the height that reaches the adjusting fore-set by screw-thread fit by the position of regulating column sleeve and cylinder head, thus the adjusting of realization valve lift.Though realized the step-less adjustment of valve, but it exists the defective in the design to make it can't obtain promoting.
At first column sleeve cooperates with cylinder head by screw thread, and in the course of the work, column sleeve is a Members Under Impact Loading, and under impact at a high speed, the requirement of double thread intensity is very high.Though can adopt trapezoidal thread to improve intensity, but the life-span of its use is still very limited.More fatal is that screw thread is interior cooperating structure, is embedded in the cylinder head, after it damages, changes very difficultly, and the whole cylinder head of need is changed in the lump, causes maintenance cost very high.Another shortcoming is that column sleeve is the semitight structure, and under the working state of the compressing that runs up, lubricant oil pressure produces very big resistance to fore-set in column sleeve.Therefore must adopt the hollow fore-set, and offer oilhole up and down, this has just caused the intensity of fore-set to descend greatly, to the material requirements height, has also shortened the working life of mechanism.Be fore-set at last with rocking arm between be not connected, rocking arm produces fore-set and knocks effect, causes fore-set to destroy easily, has also improved the unstability of structure simultaneously.Because the defective in above-mentioned all designs, existing step-less adjustment valve mechanism all is present in the Design Theory stage, can't be by actual test.
Summary of the invention
Technical problem to be solved by this invention is the defective that overcomes prior art, designs a kind of simple in structurely, and stability is high, the motor lift stepless regulating mechanism of long service life, thus improve the power of motor and realize fuel-economyization, reduce environmental pollution.
This patent is achieved through the following technical solutions above-mentioned purpose.
The disclosed engine air valve lift stepless regulating mechanism of the design, comprise the cam mechanism that the valve mechanism, the end that are arranged on engine cylinder and cover are pressed in rocking arm, the fore-set mechanism on the valve mechanism and drive rocking arm middle part pulley on the structure, the structure of its improvement is that described fore-set mechanism comprises the fore-set sleeve pipe that is opened on the cylinder head, be located at last fore-set, the following fore-set in the fore-set sleeve pipe and be installed in the spring between the fore-set up and down, with the stepless regulating mechanism that fore-set under the support slides up and down in the fore-set sleeve pipe, the other end of last fore-set and rocking arm is hinged.The present invention adopts the fore-set structure of two-part, and stepless regulating mechanism independently is arranged on down the downside of fore-set, thereby has reduced the requirement to component strength, also is convenient to maintenance and replacing.And adopt open fore-set sleeve structure up and down, the pressure of avoiding lubricant oil in running up, to produce.Therefore, the design's main strength member is a fore-set up and down, and fore-set can adopt solid structure up and down, and its intensity can realize easily, and guarantees working life.Another improvement is to go up the fore-set rocking arm that is connected through the hinge, and has avoided the percussion of rocking arm to last fore-set, has improved structural behaviour greatly.
Its working principle is in the time of cam mechanism compacting rocking arm, since up and down between the fore-set elasticity of spring much smaller than the valve spring of valve mechanism, therefore the hinged end of rocking arm and fore-set presses down earlier, after the gap about having overcome between the fore-set, therefore up and down its other end just begins to suppress valve to be opened, and the size in gap has directly determined the size of valve angle of release between the fore-set.Regulate fore-set upper-lower position in the fore-set sleeve pipe down by stepless regulating mechanism, can nonrated adjusting gap length in certain scope, thus realize the adjusting of valve angle of release.
Described stepless regulating mechanism can have a lot of structures, generally can adopt motor-driven structure or hydraulic mechanism to drive.Adopt the following several mechanisms of motor-driven specific implementation structure optimization: described stepless regulating mechanism is an eccentric cam, and fore-set slided up and down under the eccentric cam outer was supported, and its rotating shaft is rotated by motor driving.Eccentric cam has the different length radius of gyration of nature transition, and in the time of its rotation of driven by motor, cam supports level and smooth the sliding up and down of fore-set down.Or stepless regulating mechanism employing wedge shape support block, fore-set slided up and down under its plane of inclination was supported, and following fore-set lower end is provided with the plane of inclination that cooperates with the wedge shape support block, and the wedge shape support block is by slip before and after the motor driving.Or constitute by tooth bar that is connected down the fore-set downside and the gear that cooperates with tooth bar, gear is by motor driving.Can also be the structure that stepless regulating mechanism adopts the chute that is arranged on down the slide block of fore-set lower end and cooperates with slide block, chute one end be provided with rotating shaft, and rotating shaft is rotated by motor driving.For the equipment that hydraulic mechanism drives, described stepless regulating mechanism comprises oil hydraulic cylinder, is installed in the piston of fore-set under supporting in the oil hydraulic cylinder and the oil hydraulic pump of the interior liquid measure of regulator solution cylinder pressure.
In order to guarantee that spring is not twisted compression in the high-speed motion process, be not hit, the side that the present invention contacts with spring at fore-set up and down is provided with the annular groove that is used to install with retaining spring.Groove structure can provide and hold the space of compressing rear spring, and plays the effect of protection spring end, avoids being twisted and receiving the impact of fore-set up and down at the compression process medi-spring, has improved degree of regulation and has guaranteed working life.
The present invention adopts novel engine fore-set mechanism, has overcome existing fore-set insufficient strength, and working life is short, can't be with the shortcoming of valve stepless regulating mechanism industrial applications.Under suitable manufacture cost, improved the intensity and the reliability of fore-set mechanism greatly, and made controlling mechanism be convenient to maintenance and safeguard simpler and easy.This mechanism also makes the modification that adapts at above-mentioned improvement to other members, has improved reliability of structure greatly, guarantees working life.With respect to prior art, this patent has outstanding substantive distinguishing features and obvious improvement.
Description of drawings
Fig. 1 is this patent embodiment 1 a structural representation;
Fig. 2 is the structural representation of stepless regulating mechanism among the embodiment 1;
User mode schematic representation one when Fig. 3 is low engine speed;
User mode schematic representation two when Fig. 4 is low engine speed;
Fig. 5 is for being adjusted to engine valve the schematic representation of high speed user mode;
User mode schematic representation one when Fig. 6 is high engine speeds;
User mode schematic representation two when Fig. 7 is high engine speeds;
Fig. 8 is this patent embodiment 2 a structural representation;
Fig. 9 is the structural representation of stepless regulating mechanism among the embodiment 2;
Figure 10 is this patent embodiment 3 a structural representation;
Figure 11 is the structural representation of stepless regulating mechanism among the embodiment 3;
Figure 12 is this patent embodiment 4 a structural representation;
Figure 13 is the structural representation of stepless regulating mechanism among the embodiment 4.
Embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention is described further.
Embodiment 1
A kind of engine air valve lift stepless regulating mechanism as shown in Figure 1, on the cylinder head 1 of motor, be separately installed with valve mechanism 2 and fore-set mechanism 4; rocking arm 3 one ends 33 are pressed on the valve mechanism 2; the last fore-set 41 of the other end and fore-set mechanism 4 is hinged by hinge 32; cam mechanism 5 rotates the pulley 31 at compacting rocking arm 3 middle parts, promote rocking arm 3 compacting valve mechanisms 2 and open.The structure-improved of this patent is to offer on the cylinder head 1 fore-set sleeve pipe 11 and is used to hold fore-set mechanism 4, fore-set mechanism 4 by last fore-set 41, down fore-set 43 and up and down the spring between the fore-set 42 constitute, fore-set is provided with annular groove and is used for mounting spring 42 up and down.Following fore-set 43 downsides are provided with stepless regulating mechanism 6 and are used to regulate down the position of fore-set 43 in fore-set sleeve pipe 11.Fore-set 43 is in the time of engine low speed state under shown in the figure, and the distance between the last fore-set 41 is d
1
Can find out that in conjunction with Fig. 2 described stepless regulating mechanism 6 drives one group of eccentric cam 63 by motor 61 by the gear mechanism 62 that cooperatively interacts, present embodiment is a four cylinder engine, is provided with four eccentric cams 63, and fore-set 43 slided up and down under eccentric cam 63 outers were supported.
Under the low engine speed working state, its working procedure as shown in Figure 3, Figure 4.At first as can be seen from Figure 3, when cam mechanism 5 begins to rotate propelling sheave 31 when gliding, because the elasticity of spring 42 is much smaller than valve spring 21, so spring 42 at first compresses.Rocking arm 3 ends 33 invariant positions, hinge 32 promotes to go up fore-set 41 and moves down pressure spring 42.As last fore-set 41 moving displacement d
1Afterwards, as shown in FIG., last fore-set 41 is subjected to down the restriction of fore-set 43, no longer continues to move down.Be rotated further when cam mechanism 5 this moment, when propelling sheave 32 moves down, its working state as shown in Figure 4, hinge 32 invariant positions, rocking arm 3 ends 33 press down, compression valve mechanism 22, valve spring 21 begins compression, valve 22 is opened.When cam mechanism 5 turned to the major axis fixed point, the distance that valve 22 is opened was l
1The distance opened of valve 22 is less as seen from the figure, and the valve angle of release is also smaller, is applicable to the valve requirement of motor under low cruise.
When motor the time, require valve mechanism 2 angle of releases to increase the retarded admission shut-in time at the high speed operation state.By motor 61 actuation gear mechanisms 62, drive eccentric cam 63 and rotate, support down that fore-set 43 upwards slides, shorten to d until the distance of fore-set up and down
2, as shown in Figure 5, fore-set mechanism 4 is under the fast state at this moment.When cam mechanism 5 began to rotate propelling sheave 31 downslides, last fore-set 41 can only move down displacement d
2, as shown in Figure 6.Cam mechanism 5 is rotated further and then begins compression valve spring 21, as shown in Figure 7, because d
2Less than d
1So, valve 22 move down apart from l
2Will be greater than l
1Thereby, make the lift of valve mechanism 2 increase, sufficient fuel combination is provided for the motor that runs up.
The another kind of structure of implementing of the present invention as can be seen from Figure 8 mainly is the structure of stepless regulating mechanism 6 with a last embodiment's difference.Can see in more detail that in conjunction with Fig. 9 stepless regulating mechanism 6 comprises motor 61 and wedge shape support block 64, motor 61 is by the cooperation of wheel and rack.Drive wedge shape support block 64 front and back and slide, fore-set 43 slided up and down under its plane of inclination was supported, and following fore-set 43 lower ends are provided with the plane of inclination that cooperates with wedge shape support block 64.When motor 61 drive wedge shape support blocks 64 move right, fore-set 43 moves up under supporting, and when motor 61 drive wedge shape support blocks 64 were moved to the left, supporting down, fore-set 43 moved down, thereby the realization step-less adjustment is the purpose in the gap between the fore-set up and down, shown in arrow among the figure.
Figure 10 is the embodiment 2 of this patent, analyzes its detailed structure in conjunction with the view of Figure 11.Described stepless regulating mechanism comprises tooth bar 44 that is connected down fore-set 43 downsides and the gear 65 that cooperates with tooth bar 44, and gear is driven by gear mechanism 62 by motor 61.In the time of starting electrical machinery 61, gear mechanism 62 drives one group of gear 65 and rotates, and promotes fore-set 43 down up and down thereby drive tooth bar 44, and the adjusting of fore-set 43 positions under realizing is shown in arrow among the figure.
Embodiment 4
Explain embodiment 4 in conjunction with Figure 12 and Figure 13, as shown in the figure, its agent structure is the same with the foregoing description, and the main distinction is stepless regulating mechanism 6.Drive one group of chute 66 by motor 61 actuation gear mechanisms 62 and rotate, following fore-set 43 lower ends are provided with slide block 45 and cooperate with chute 66.When chute 66 rotated, slide block 43 vertically moved up and down in chute, and fore-set 43 moves up and down thereby drive down.
In sum, this patent is realized the adjusting of valve lift size by regulating the gap between the fore-set up and down.Because the adjusting in described gap adopts stepless smooth excessiveness to regulate, thus the size of the angle of release of valve can be in certain scope the adjusting of freedom and flexibility, promptly can set suitable valve lift size according to the rotating speed of motor.Thereby the peak output of performance motor, and the waste of minimizing gasoline.The present invention not only is confined to the structure of the foregoing description, and any valve adjustments mechanism of above-mentioned design concept that adopted all belongs to this patent scope required for protection.
Claims (9)
1. engine air valve lift stepless regulating mechanism, comprise the cam mechanism that the valve mechanism, the end that are arranged on engine cylinder and cover are pressed in rocking arm, the fore-set mechanism on the valve mechanism and drive rocking arm middle part pulley, it is characterized in that described fore-set mechanism comprise the fore-set sleeve pipe that is opened on the cylinder head, be located at last fore-set in the fore-set sleeve pipe, down fore-set and be installed in described spring between the fore-set up and down, support under the stepless regulating mechanism that in the fore-set sleeve pipe, slides up and down of fore-set, the other end of last fore-set and rocking arm is hinged.
2. engine air valve lift stepless regulating mechanism according to claim 1 is characterized in that described stepless regulating mechanism passes through motor driving.
3. engine air valve lift stepless regulating mechanism according to claim 2 is characterized in that described stepless regulating mechanism is an eccentric cam, and fore-set slided up and down under the eccentric cam outer was supported, and the eccentric cam rotating shaft is rotated by motor driving.
4. engine air valve lift stepless regulating mechanism according to claim 2, it is characterized in that described stepless regulating mechanism is the wedge shape support block, its plane of inclination is supported down, and fore-set slides up and down, following fore-set lower end is provided with the plane of inclination that cooperates with the wedge shape support block, and the wedge shape support block is by sliding before and after the motor driving.
5. engine air valve lift stepless regulating mechanism according to claim 2 is characterized in that described stepless regulating mechanism comprises tooth bar that is connected down the fore-set downside and the gear that cooperates with tooth bar, and gear is by motor driving.
6. engine air valve lift stepless regulating mechanism according to claim 2 is characterized in that described stepless regulating mechanism comprises slide block that is arranged on down the fore-set lower end and the chute that cooperates with slide block, and chute one end is provided with rotating shaft, and rotating shaft is rotated by motor driving.
7. engine air valve lift stepless regulating mechanism according to claim 1 is characterized in that described stepless regulating mechanism drives by hydraulic mechanism.
8. engine air valve lift stepless regulating mechanism according to claim 7 is characterized in that described stepless regulating mechanism comprises oil hydraulic cylinder, is installed in the piston of fore-set under supporting in the oil hydraulic cylinder and the oil hydraulic pump of the interior liquid measure of regulator solution cylinder pressure.
9. according to each described engine air valve lift stepless regulating mechanism of claim 1 to 8, it is characterized in that the side that described fore-set up and down contacts with described spring is provided with the annular groove that is used to install and locate described spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810030193A CN100575683C (en) | 2008-08-15 | 2008-08-15 | A kind of engine air valve lift stepless regulating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810030193A CN100575683C (en) | 2008-08-15 | 2008-08-15 | A kind of engine air valve lift stepless regulating mechanism |
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| Publication Number | Publication Date |
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| CN101338703A CN101338703A (en) | 2009-01-07 |
| CN100575683C true CN100575683C (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810030193A Expired - Fee Related CN100575683C (en) | 2008-08-15 | 2008-08-15 | A kind of engine air valve lift stepless regulating mechanism |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678220B (en) * | 2011-03-08 | 2016-04-20 | 朱譞晟 | Axially drive the single shaft dual control full Variable Valve Time of arc chute formula and lift mechanisms |
| CN103334797B (en) * | 2013-07-15 | 2015-07-08 | 祥天控股（集团）有限公司 | Remote control valve |
| CN104847435B (en) * | 2014-05-29 | 2017-07-11 | 北汽福田汽车股份有限公司 | Valve actuating mechanism, engine and the vehicle of engine |
| KR101664078B1 (en) * | 2015-09-21 | 2016-10-10 | 현대자동차 주식회사 | Continuous varible vavle lift apparatus and engine provided with the same |
| CN107462421B (en) * | 2017-10-12 | 2023-04-11 | 河北工业大学 | Rotatable valve experimental device of engine |
| CN109322719B (en) * | 2018-10-30 | 2021-01-12 | 中国北方发动机研究所(天津) | Hydraulic variable valve rocker device |
| CN111520210B (en) * | 2020-04-29 | 2021-05-28 | 江苏赛耐气门有限公司 | Valve stroke adjustable device based on eccentric chute transmission principle |
| CN112282885A (en) * | 2020-10-26 | 2021-01-29 | 奇瑞汽车股份有限公司 | Valve lift adjusting system |
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- 2008-08-15 CN CN200810030193A patent/CN100575683C/en not_active Expired - Fee Related
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Granted publication date: 20091230 Termination date: 20120815 |