CN106321182B - Internal combustion engine mechanical valve lift adjusts buffer unit - Google Patents
Internal combustion engine mechanical valve lift adjusts buffer unit Download PDFInfo
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- CN106321182B CN106321182B CN201510366301.0A CN201510366301A CN106321182B CN 106321182 B CN106321182 B CN 106321182B CN 201510366301 A CN201510366301 A CN 201510366301A CN 106321182 B CN106321182 B CN 106321182B
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Abstract
The present invention relates to a kind of internal combustion engine mechanical valve lifts to adjust buffer unit, including：Cam；It is connected to the tappet group of cam, tappet group includes lower tappet and upper tappet, and for adjusting the tappet length adjusting unit of distance between lower tappet and upper tappet between lower tappet and upper tappet, tappet length adjusting unit includes：Deflection push rod between lower tappet and upper tappet is set, and the first servo drive unit for moving left and right deflection push rod, the thickness that deflection push rod is set as its up and down direction from left to right successively increase；Valve group, valve group include valve, valve spring and cotter seat；And one end is connected to the rocker arm that the valve group other end is connected to tappet group；The rotation of cam drives the up and down motion of the tappet of tappet group, and then rotates rocker arm and control the open and close of valve.Device provided by the invention can be actually needed according to burning and exhausting arbitrarily changes air inflow or capacity, can be further improved internal combustion engine overall performance.
Description
Technical field
The present invention relates to internal combustion engine technologies, and in particular to a kind of four-stroke ic engine machine valve stroke adjusting is slow
Flushing device, but the device can be actually needed according to burning and exhausting and arbitrarily change air inflow or capacity, be applied to Engine Cam
Valve stroke is driven by transmission chain, achievees the purpose that energy-saving and environmental protection, further increases internal combustion engine overall performance.
Background technique
With energy day being becoming tight and atmosphere pollution increasingly sharpens, internal combustion engine manufacturing is faced with a new round
Innovation and change, synergy, energy-saving and environmental protection are the eternal themes of internal combustion engine development.Especially combustion system innovative technology constantly mentions
High and application, along with variable timing technology is released, fires internal combustion engine if high-pressure common rail electron controls technology is widely used to promote
Burning system is significantly alterred and is promoted, and can be changed according to power of IC engine provide necessary fuel completely, but valve stroke is also
It does not supply how many according to fuel and changes.Inlet and outlet amount makes air-fuel ratio cannot get Proper Match, and the above several new technologies do not have
Greater role is given full play to, in order to which high performance internal combustion engine further increases, lift range variable is the major combustion engine manufacture in the whole world
The mechanisms such as enterprise, research and development put into the major subjects that a large amount of manpower and material resources are researched and developed, as this is graceful for ABB AB of Britain, German glycolylurea
Company etc. all releases the exemplar of their developments, and structure is extremely complex.China also has many colleges and universities and R&D institution all to set up the project already
Research and development, but it is slower to research and develop progress.
Summary of the invention
Structure is complicated the present invention is directed to overcoming existing variable air valve lift range mechanism it is bulky the problems such as, a kind of structure is provided
Valve adjustments buffer unit that is simple and can reliably adjusting valve stroke.
The present invention provides a kind of internal combustion engine valve lift adjusting buffer unit, including：
Cam；Be connected to the tappet group of cam, the tappet group includes lower tappet and upper tappet, and be located at lower tappet and
For adjusting the tappet length adjusting unit of distance between lower tappet and upper tappet, the tappet length adjustment list between upper tappet
Member may include：Deflection push rod between the lower tappet and upper tappet is set, and moves left and right the deflection push rod
First servo drive unit, the thickness that the deflection push rod is set as its up and down direction from left to right successively increase；Valve group, institute
Stating valve group includes valve, valve spring and cotter seat；And one end is connected to the valve group other end and is connected to tappet group
Rocker arm；The rotation of the cam drives the up and down motion of the tappet of the tappet group, and then the rocker arm is made to rotate and control
The open and close of valve.
The present inventor for many years studies I. C engine combustion system, and in conjunction with domestic and international research achievement, it is existing to be conceived to improvement
Diesel engine turn to such a kinematic chain of valve reciprocation from cam, by keep cam curve it is constant, and increase endure
Pole length tunable arrangement is varied with tappet length, realizes that valve stroke is adjustable, successfully develop it is a set of not only simple but also
Reliable variable valve lift device.On this basis, electronic control high-pressure common rail, variable timing, changeable air valve is added
The technologies such as lift are effectively combined application, and such internal combustion engine is regardless of in which power section, all there is no matched due to air-fuel ratio
Unreasonable and bad, the waste of energy that causes to burn pollutes air.
The deflection push rod of up and down direction gradient thickness moves in the lateral direction between upper and lower tappet, can by means of this
The variable of total tappet length is realized simply to adjust the distance between upper and lower tappet.
In above-mentioned tappet length adjusting unit, the first servo drive unit for moving left and right the deflection push rod can
Including fixed rotating shaft servo motor retarder, fixed rotating shaft, guide post, thrust plate, the fixed rotating shaft is connected to the fixation and turns
Axis servo motor retarder, the thrust plate are mounted on fixed rotating shaft and guide post.
Preferably, it is single to be additionally provided with zero lash valve buffering between the tappet length adjusting unit and the upper tappet
Member, the zero lash valve buffer cell include the movable bulb for buffering sliding shoe, being arranged in the buffering sliding shoe, and
Buffer spring between the buffering sliding shoe and movable bulb is set.
It is also to adjust valve lifter length that the present invention, which fully takes into account adjustment valve clearance, if increasing valve clearance infinitely
Greatly, this is also not allow, and it is rough to will cause air valve drop, and valve premature breakdown or fracture cause serious consequence, so upper
A set of zero lash valve buffer unit is set again between tappet and tappet length adjusting unit, when work accomplishes that valve rocker is adjusted
Screw gapless, and valve-closing can be made to seal, so that air valve drop is reduced impact, reaches and extend valve service life and reduction
The effect of noise.
In the present invention, the intensity of the buffer spring is less than the intensity of the valve spring.It, can be to avoid convex by means of this
Wheel shaft withstands tappet bulb, and just opens valve when valve does not work.
In the present invention, the tappet group further include be respectively used to guide lower tappet and upper tappet lower tappet guide and it is upper very
Bar guide sleeve.
The beneficial effect of the technical scheme provided by the present invention is that working as internal combustion due to increasing mechanical tappet length tunable arrangement
When machine operating condition needs to change air inlet, sent instructions by control system, servo motor drive worm and wormwheel, rotation, worm gear internal diameter with it is defeated
Shaft is threadedly engaged, and output shaft does not turn when rotating turbine, can only be moved left and right, and push-and-pull top plate is moved forward and backward deflection push rod, is changed
Become tappet length.In addition, the present invention considers infinitely increase due to shortening tappet valve clearance, this does not allow, it is necessary to
There is a set of elimination valve clearance buffer unit is comprehensive to use, just can ensure that safe and reliable to operation, has among buffer unit, lower tappet
One buffer spring, spring strength are weaker than valve spring, withstand tappet bulb from camshaft, when being that valve stroke adjustment does not work
Valve is just opened, valve-closing is similarly very close to each other when arriving minimum, and since both sides spring force interacts, air valve drop reduces
Impact force.The present apparatus is can be changed within the scope of cam lift, can only be become smaller, cannot be become larger, so answering when design diesel engine cam
Consider that lift will more greatly, additional advantage is structure is simple, good reliability, installation site is reasonable, manufacturing cost is low etc..
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of Diesel Engine Mechanical formula valve stroke adjusts buffer unit；
Fig. 2 is the structural schematic diagram that a kind of diesel engine hydraulic formula valve stroke adjusts buffer unit；
Fig. 3 is the structural schematic diagram of the mechanical tappet length adjusting unit in Fig. 1；
Fig. 4 is the structural schematic diagram of the fluid pressure type tappet length adjusting unit in Fig. 2；
Fig. 5 is the structural schematic diagram of the zero lash valve buffer cell in Fig. 1 and Fig. 2；
Fig. 6 is valve stroke (portion A) enlarged drawing in Fig. 1 and Fig. 2；
Wherein, 1- cam；2- idler wheel；3- roller pin；4- roller mount；5- shell；Tappet under 6-；Tappet spring under 7-；8-
Lower tappet guide；The mechanical tappet length adjusting unit of 9-；9-1 fixed rotating shaft servo motor retarder；9-2 fixed rotating shaft；9-3
Interior snap ring；9-4 guide post；9-5 thrust plate；9-6 bearing；9-7 bearing axis；9-8 deflection push rod；9 '-fluid pressure type lift tunable arrangements；
9 ' -1 sliding shaft servo motor retarders；9 ' -2 horizontally slip axis；9 ' -3 nuts；9 ' 4 sealing rings；9 ' -5 pistons；9 ' -6 storages
Lubricating cup；9 ' -7 tappet chambers；10- zero lash valve buffer cell；10-1 buffers slide mass；10-2 activity bulb；10-3 buffering elastic
Spring；Tappet on 11；The upper tappet guide of 12-；13- rocker arm bracket；14- rocker arm shaft；15- rocker arm；16- is adjustable top screw；17- valve
Hough locker；18- valve spring upper seat；19- valve spring；Seat under 20- valve spring；21- valve guide；22- valve；23-
Valve seating；24- cylinder head；25- diesel-engine body.
Specific embodiment
The present invention is further illustrated below in conjunction with attached drawing and following embodiments, it should be appreciated that attached drawing and following embodiments
It is merely to illustrate the present invention, is not intended to limit the present invention.
Referring to Fig. 1 and Fig. 2, the present invention relates to a kind of four-stroke ic engine valve strokes to adjust buffer unit, can wrap
Cam 1, idler wheel 2, roller pin 3, roller mount 4, lower tappet 6, lower tappet spring 7, lower tappet guide 8, mechanical (hydraulic) formula is included to endure
Pole length adjusts single 9,9 ', zero lash valve buffer cell 10, upper tappet 11, upper tappet guide 12, rocker arm bracket 13, rocker arm shaft
14, under rocker arm 15, adjustable top screw 16, valve Hough locker 17, valve spring upper seat 18, valve spring 19, valve spring
Seat 20, valve guide 21, valve 22, valve seating 23, cylinder head 24 and diesel-engine body 25.
Cam 1 is fixed on camshaft (not shown), and roller mount 4 is mounted in shell 5, and idler wheel 3 is fixed on roller mount 4
On, shell 5 is fixed on diesel-engine body 25, and lower tappet 6 is mounted on to be connected to cam 1 by means of idler wheel 3 in roller mount 4,
Lower tappet spring 7 is mounted between roller mount 4 and lower tappet guide 8, and lower tappet guide 8 can be fixed on roller mount guide sleeve.
Referring to Fig. 1 and Fig. 3, in mechanical lift tunable arrangement, mechanical tappet length adjusting unit 9 and thereon by
Serve Motor Control worm gear reducer (fixed rotating shaft servo motor retarder 9-1) is fixed on diesel-engine body 25, and turbine is defeated
Shaft (fixed rotating shaft 9-2) is fixed on fixed rotating shaft servo motor retarder 9-1, and guide post 9-4 is fixed on fixed rotating shaft servo
On motor reducer 9-1, thrust plate 9-5 is mounted on guide post 9-4 and fixed rotating shaft 9-2, and bearing 9-6 is mounted on bearing axis 9-7
On, bearing axis 9-7 is fixed on deflection push rod 9-8, and deflection push rod 9-8 is mounted on lower tappet 6 and zero lash valve buffer cell
10, between, i.e., zero lash valve buffer cell 10 is installed, between deflection push rod 9-8 and upper tappet 11.By servo motor control
Worm gear reducer processed pushes output shaft (fixed bias circuit 9-2) sliding, completes tappet length adjustable function).
Its structural schematic diagram for showing zero lash valve buffer cell 10 referring to Fig. 5, wherein buffering slide mass 10-1 can pacify
In lower tappet guide 8, movable bulb 10-2 is mounted in buffering slide mass 10-1, and buffer spring 10-3 is mounted on snubber slide
Between kinetoplast 10-1 and movable bulb 10-2, upper tappet 11 is mounted on movable bulb 10-2.
Fig. 1 and Fig. 2 is returned to, upper tappet guide 12 is fixed between lower tappet guide 8 and cylinder head 24, the top of upper ejector pin 11
Portion is connect with cylinder head 24, and rocker arm bracket 13 is fixed in cylinder head 24, and rocker arm shaft 14 is fixed on rocker arm bracket 13；Rocker arm 15 is installed
On rocker arm shaft 14, adjustable top screw 16 is fixed on rocker arm 15, and valve Hough locker 17 is fixed on valve spring upper seat 18
On, valve spring 19 is fixed between valve spring upper seat 18 and valve spring lower seat 20, seat 20, valve guide under valve spring
21 are fixed in cylinder head 24, and valve 22 is mounted in valve guide 21, and valve seating 23 is fixed in cylinder head 24, cylinder head 24
It is fixed on diesel-engine body 25.
According to Fig. 1, Fig. 3, Fig. 5 and Fig. 6, when work, cam 1 is rotated, idler wheel 2, roller mount 4, lower tappet 6, it is flat tiltedly
Push rod 9-8, buffering slide mass 10-1, activity bulb 10-2 and upper tappet 11 move upwardly together, and rocker arm 15 is around 14 turns of rocker arm shaft
Dynamic, adjustable top screw 16 pushes valve 22, and valve 22 moves down a distance H unlatching, and when operating condition needs, control is slided
9-2 fixed rotating shaft sliding on shaft servo motor retarder 9-1, makes guide post 9-4 horizontally slip；Push bearing 9-5 and it is flat tiltedly
Push rod 9-8 is moved to the left or right, and changes buffering slide mass 10-1, the height that activity bulb 10-2 and upper tappet 11 rise or fall
Degree, to change the size of 22 open gap H of valve (referring to Fig. 6)., (fluid pressure type lift tunable arrangement, the axis that horizontally slips installation
On sliding shaft servo motor retarder, sealing ring is fixed in lower tappet guide).
, fluid pressure type gas referring to fig. 2, Fig. 4 shows the another example that valve stroke of the invention adjusts buffer unit, i.e.,
Door lift adjusts buffer unit (component same as below is marked with identical symbol)：Cam 1 is fixed on camshaft, and idler wheel 2 is used
Roller pin 3 is mounted in roller mount 4, and on the fixed diesel-engine body 25 of shell 5, lower tappet 6 is mounted in roller mount 4, lower tappet
Spring 7 is mounted between roller mount 4 and lower tappet guide 8, and lower tappet guide 8 is fixed in roller mount 4, fluid pressure type tappet length
It adjusts unit 9 ' and sliding shaft servo motor retarder 9 ' -1 thereon is fixed on diesel-engine body 24, horizontally slip axis
9 ' -2 are mounted on sliding shaft servo motor retarder 8 ' -1, and sealing ring 9 ' -4 is fixed in lower tappet guide 8, hydraulic oil quilt
Be sealed between sealing ring 9 ' -4 formation tappet chamber 9 ' -7, zero lash valve buffer cell 10 be mounted on tappet chamber 9 ' -7 and it is upper very
Between bar 11, buffering slide mass 10-1 is mounted in lower tappet guide 8, and movable bulb 10-2 is mounted on buffering slide mass 10-1
Interior, buffer spring 10-3 is mounted between buffering slide mass 10-1 and movable bulb 10-2, and upper tappet 11 is mounted on movable bulb
On 10-2, upper tappet guide 12 is fixed between lower tappet guide 8 and cylinder head 24, and rocker arm bracket 13 is fixed in cylinder head 24,
Rocker arm shaft 14 is fixed on rocker arm bracket 13；Rocker arm 15 is mounted on rocker arm shaft 14, and adjustable top screw 16 is fixed on rocker arm 15,
Valve Hough locker 17 is fixed on valve spring upper seat 18, and valve spring 19 is fixed on valve spring upper seat 18 and valve spring
Between lower seat 20, seat 20, valve guide 21 are fixed in cylinder head 24 under valve spring, and valve 22 is mounted on valve guide 21
In, valve seating 23 is fixed in cylinder head 24, and cylinder head 24 is fixed on diesel-engine body 25.
With reference to the accompanying drawings shown in 2,4,5 and 6, when work, cam 1 is rotated, idler wheel 2, roller mount 4, lower tappet 6, hydraulic cavities 9 '-
Hydraulic oil, zero lash valve buffer unit 10 and upper tappet 11 in 7 move upwardly together, and rocker arm 15 is rotated around rocker arm shaft 14,
Adjustable top screw 16 pushes valve 22, and valve 22 moves down a distance H unlatching, and when operating condition needs, control sliding turns
The axis 9 ' -2 that horizontally slips on axis servo motor retarder 9 ' -1 is rotated and is horizontally slipped, the high or low position of the liquid level of hydraulic oil 9 ' -7
It sets, the height that buffering slide mass 10-1, activity bulb 10-2 and upper tappet 11 rise or fall, thus between changing the unlatching of valve 22
The size of gap H (referring to Fig. 6).
Similarly, if it is multi-cylinder diesel engine, as long as such a diesel engine spiracle lift of setting on each cylinder
Regulating device and zero lash valve buffer unit, so that it may realize the adjusting of multi-cylinder diesel engine valve stroke.
It should be understood that above-mentioned tappet length adjusting unit 9,9 ' is only preferred example, it is convenient to omit or change part of
Component continuously adjusts distance between tappet up and down as long as being able to achieve.
Claims (5)
1. a kind of internal combustion engine valve lift adjusts buffer unit, which is characterized in that including：
Cam (1)；
It is connected to the tappet group of cam (1), the tappet group includes lower tappet (6) and upper tappet (11), and is located at lower tappet
(6) for adjusting the tappet length adjusting unit of distance between lower tappet (6) and upper tappet (11) between upper tappet (11)
(9), the tappet length adjusting unit (9) includes：The deflection push rod being arranged between the lower tappet (6) and upper tappet (11)
(9-8), and the first servo drive unit for moving left and right the deflection push rod (9-8), deflection push rod (9-8) setting
It is from left to right successively increased for the thickness of its up and down direction；
Valve group, the valve group include valve (22), valve spring (19) and cotter seat (18,20)；And
One end is connected to the rocker arm (15) that the valve group other end is connected to tappet group；
The rotation of the cam (1) drives the up and down motion of the tappet (6,11) of the tappet group, and then rotates the rocker arm
And control the open and close of valve (22).
2. valve stroke according to claim 1 adjusts buffer unit, which is characterized in that first servo drive unit
Including fixed rotating shaft servo motor retarder (9-1), fixed rotating shaft (9-2), guide post (9-4), thrust plate (9-5), the fixation
Shaft (9-2) is connected to the fixed rotating shaft servo motor retarder (9-1), and the thrust plate (9-5) is mounted on fixed rotating shaft
On (9-2) and guide post (9-4).
3. valve stroke according to claim 1 or 2 adjusts buffer unit, which is characterized in that in the tappet length tune
It is additionally provided with zero lash valve buffer cell (10) between section unit (9) and the upper tappet (11), the zero lash valve is slow
Rushing unit (10) includes the movable bulb (10-2) of buffering sliding shoe (10-1), setting in buffering sliding shoe (10-1),
And buffer spring (10-3) of the setting between buffering sliding shoe (10-1) and movable bulb (10-2).
4. valve stroke according to claim 3 adjusts buffer unit, which is characterized in that the buffer spring (10-3)
Intensity is less than the intensity of the valve spring (19).
5. valve stroke according to claim 3 adjusts buffer unit, which is characterized in that the tappet group further includes difference
For guiding the lower tappet guide (8) and upper tappet guide (12) of lower tappet (6) and upper tappet (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366301.0A CN106321182B (en) | 2015-06-29 | 2015-06-29 | Internal combustion engine mechanical valve lift adjusts buffer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366301.0A CN106321182B (en) | 2015-06-29 | 2015-06-29 | Internal combustion engine mechanical valve lift adjusts buffer unit |
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| Publication Number | Publication Date |
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| CN106321182A CN106321182A (en) | 2017-01-11 |
| CN106321182B true CN106321182B (en) | 2018-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510366301.0A Active CN106321182B (en) | 2015-06-29 | 2015-06-29 | Internal combustion engine mechanical valve lift adjusts buffer unit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246223Y (en) * | 2008-08-15 | 2009-05-27 | 黎伟权 | Engine air valve lift regulating mechanism |
| CN102705027A (en) * | 2012-06-11 | 2012-10-03 | 吉林大学 | Valve stroke variable adjusting system |
| CN103850746A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Variable valve lift device based on movable cam |
| CN204877573U (en) * | 2015-06-29 | 2015-12-16 | 上海高斯通船舶配件有限公司 | Explosive motor mechanical type valve lift adjusts buffer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6513470B1 (en) * | 2000-10-20 | 2003-02-04 | Delphi Technologies, Inc. | Deactivation hydraulic valve lifter |
-
2015
- 2015-06-29 CN CN201510366301.0A patent/CN106321182B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246223Y (en) * | 2008-08-15 | 2009-05-27 | 黎伟权 | Engine air valve lift regulating mechanism |
| CN102705027A (en) * | 2012-06-11 | 2012-10-03 | 吉林大学 | Valve stroke variable adjusting system |
| CN103850746A (en) * | 2014-02-28 | 2014-06-11 | 天津大学 | Variable valve lift device based on movable cam |
| CN204877573U (en) * | 2015-06-29 | 2015-12-16 | 上海高斯通船舶配件有限公司 | Explosive motor mechanical type valve lift adjusts buffer |
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| CN106321182A (en) | 2017-01-11 |
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