CN109779715A - A kind of variable valve timing-lift device and its control method - Google Patents
A kind of variable valve timing-lift device and its control method Download PDFInfo
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- CN109779715A CN109779715A CN201910141286.8A CN201910141286A CN109779715A CN 109779715 A CN109779715 A CN 109779715A CN 201910141286 A CN201910141286 A CN 201910141286A CN 109779715 A CN109779715 A CN 109779715A
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- rocker arm
- valve
- helical gear
- helical
- axle bed
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Abstract
The invention discloses a kind of variable valve timing-lift devices, comprising: rocker arm assembly, rocker arm assembly include rocker arm and rocker arm shaft, are set on rocker arm shaft in the middle part of rocker arm and rotate upwardly and downwardly around rocker arm shaft；It is set to the valve assembly of one end, valve assembly includes the spring base being fixed in cylinder head and the valve through spring base, valve includes valve column, valve cap and the attachment base being fixed on valve column, extension spring is equipped between spring base and attachment base, the upper end of extension spring is fixedly connected with spring base, lower end is fixedly connected with attachment base；It is set to the helical wheel assembly of the rocker arm other end, helical wheel assembly includes helical wheel shaft and the helical gear that is set on helical wheel shaft, and the other end of rocker arm is fitted on the screw thread of helical gear and threadingly moved.The apparatus structure is simple and convenient to operate, and can flexibly change the motion state of valve according to various working conditions, to find engine behavior the most reasonable and working method, improves internal combustion engine thermal efficiency.
Description
Technical field
The present invention relates to technical field of engines, and in particular to a kind of variable valve timing-lift device and its controlling party
Method.
Background technique
When piston is open when suction stroke goes downwards to lower dead center from top dead centre in engine working process, and arrange
Valve is to close, when piston is completed to walk from lower to upper after first stroke, referred to as compression travel when to top dead centre, at this time into
What exhaust valve was all closed, then piston will continue to go downwards to lower dead center, at this moment referred to as working stroke, and valve is still pass at this time
It closes, after acting, piston stroking upward to top dead centre is known as instroke, at this time IC Intake Valve Closes, and exhaust valve is then to beat
It opens.Due to consideration that valve has little time to open and close, so the valve in entire stroke in high engine speeds operating
Opening and closing the time can be shifted to an earlier date and be postponed because of the different mechanical technique of each producer.
Camshaft is a component in piston engine, its effect is to control the unlatching and closed action of valve.Though
So in four-stroke engine the revolving speed of camshaft be crankshaft half (in the two stroke engine revolving speed and crankshaft of camshaft
It is identical), but usually it revolving speed it is still very high, and need to bear very big torque, thus in designing to camshaft strong
The requirement of degree and support aspect is very high, and material is usually superior alloy steel or steel alloy.Since valve motion rule is related to
The power and service performance of one engine, thus camshaft design in the design process of engine in occupation of highly important
Status.But the opening/closing time and motion state of valve can not be adjusted flexibly in existing engine according to various working conditions, no
It is relatively low to only result in internal combustion engine thermal efficiency, also the energy is caused to waste, pollutes environment.
Summary of the invention
To overcome the above deficiencies, the invention provides a kind of variable valve timing-lift device, the device knots
Structure is simple and convenient to operate, and can flexibly change the motion state of engine valve, according to various working conditions to search out
Engine behavior the most reasonable and working method, and realize the raising of the thermal efficiency of internal combustion engine.
The present invention also provides a kind of change valve timing-lift device control methods described above, and including above-mentioned
Change valve timing-lift device engine.
The present invention overcomes the technical solution used by its technical problem to be:
A kind of variable valve timing-lift device, comprising:
Rocker arm assembly, the rocker arm assembly include rocker arm and rocker arm shaft, are set in the middle part of rocker arm on rocker arm shaft and around rocker arm shaft
It rotates upwardly and downwardly；
It is set to the valve assembly of one end, the valve assembly includes the spring base being fixed in cylinder head and through spring
The valve of seat, valve include valve column, valve cap and the attachment base being fixed on valve column, spring base and attachment base it
Between be equipped with extension spring, the upper end of extension spring is fixedly connected with spring base, lower end is fixedly connected with attachment base；And
It is set to the helical wheel assembly of the rocker arm other end, the helical wheel assembly includes helical wheel shaft and is set on helical wheel shaft
Helical gear, the other end of rocker arm fits on the screw thread of helical gear and threadingly moves.
Further, one end that the rocker arm is bonded with helical gear is set as spherical, in order to make rocker arm and helical
The fitting of wheel is more compact, is more advantageous to rocker arm and moves on helical gear.
Further, the helical gear is realized that helical gear is synchronous with helical wheel shaft and is turned by key and helical gear axis connection
It is dynamic.
It further, further include the adjustable component being set to below helical gear and for adjusting helical gear height, it is described adjustable
Component includes movable axle bed, fixed plate and screw rod, and movable axle bed is close to the lower end of helical gear and is sheathed on helical wheel shaft, Gu
Dead axle seat is located at the lower section of movable axle bed and is sheathed on helical wheel shaft, is arranged with one on movable axle bed and fixed plate respectively
Axle bed lantern ring, the screw rod sequentially pass through two axle bed lantern rings and are threadedly coupled respectively with two axle bed lantern rings.
Further, each axle bed lantern ring includes the big hole for being used to be arranged movable axle bed or fixed plate and one
Small sircle hole for being connect with screw flight.
Further, the screw thread on the helical gear is the screw thread for protruding from helical wheel outer surface or indent in helical gear
The screw thread of outer surface, the screw thread of the screw thread or indent that either protrude, as long as can guarantee the rocker arm smoothly edge on helical gear
Threading action.
The present invention also provides a kind of control methods based on variable valve timing-lift device described above, by right
Helical wheel shaft carries out driving and drives the vertical reciprocating motion that is converted into rocker arm of the helical gear by itself around helical wheel shaft, thus
Drive valve it is anticipated that frequency open and close.
Further, specifically comprise the following steps:
Under the drive of helical gear, one end that rocker arm is bonded with helical gear is up moved, and extension spring stretching is opened, valve is beaten
It opens；
When one end that rocker arm is bonded with helical gear reaches highest point, under the tensile force effect of extension spring, rocker arm and helical
One end of wheel fitting falls to rapidly the bottom of helical gear, valve-closing；
According to above-mentioned steps iterative motion, the opening and closing to valve are realized.
The present invention also provides a kind of engines, including variable valve timing-lift device described above.
The beneficial effects of the present invention are:
By using variable valve timing-lift device of the invention, structure is simple and convenient to operate, can be according to various work
Situation is flexibly to change the motion state of engine valve, to search out engine behavior the most reasonable and work side
Formula, and realize the raising of the thermal efficiency of internal combustion engine.By the way that intake efficiency can be improved to the movable reasonable adjusting of air inlet, and
So that fuel-air mixture mixes more sufficiently, more rationally, burning more rapidly, more evenly, and then realize to fuel consumption into
The control of one step, achievees the purpose that economize on resources, protects environment.
Detailed description of the invention
Fig. 1 is variable valve timing-lift device positive structure schematic described in the embodiment of the present invention.
Fig. 2 is variable valve timing-lift device structure schematic diagram described in the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of axle bed lantern ring described in the embodiment of the present invention.
In figure, 1, rocker arm, 2, rocker arm shaft, 3, helical gear, 4, helical wheel shaft, 5, key, 6, movable axle bed, 7, screw rod, 8, solid
Dead axle seat, 9, axle bed lantern ring, 10, valve, 11, extension spring, 12, spring base, 13, valve column, 14, valve cap, 15, connection
Seat.
Specific embodiment
For a better understanding of the skilled in the art, being done in the following with reference to the drawings and specific embodiments to the present invention
It is further described, it is following to be merely exemplary that the scope of protection of the present invention is not limited.
As illustrated in fig. 1 and 2, a kind of variable valve timing-lift device described in the present embodiment, comprising: rocker arm assembly, gas
Door component and helical wheel assembly.The rocker arm assembly includes rocker arm 1 and rocker arm shaft 2, and the middle part of rocker arm 1 is set on rocker arm shaft 2
And it is rotated upwardly and downwardly around rocker arm shaft 2.The valve assembly is set to one end of rocker arm 1, and the valve assembly includes being fixed on cylinder
The spring base 12 covered and the valve 10 through spring base, valve 10 include valve column 13, valve cap 14 and are fixed on gas
Attachment base 15 on door pillar 13, between spring base 12 and attachment base 15 be equipped with extension spring 11, the upper end of extension spring 11 with
Spring base 12 is fixedly connected, lower end is fixedly connected with attachment base 15, and the extension spring 11 is when being not subject to load, circle and circle
Between be typically all and tight very close to each other.The helical wheel assembly is set to the other end of rocker arm 1, including helical wheel shaft 4 and sets
The helical gear 3 being placed on helical wheel shaft 4, further, the helical gear 3 are connect by key 5 with helical wheel shaft 4 to reach helical
Helical gear 3 is driven to rotate while wheel shaft 4 rotates, the other end of rocker arm 1 is fitted on the screw thread of helical gear 3 and threadingly moved
Dynamic, the present embodiment is preferred, and one end that the rocker arm 1 is bonded with helical gear 3 is set as spherical, in order to make rocker arm 1 and spiral shell
The fitting of line wheel 3 is more compact, is more advantageous to rocker arm 1 and moves on helical gear 3.
Variable valve timing-lift device described in the present embodiment further includes being set to 3 lower section of helical gear and for adjusting spiral shell
The adjustable component of 3 height of line wheel, the adjustable component include movable axle bed 6, fixed plate 8 and screw rod 7, and movable axle bed 6 is close to
The lower end of helical gear 3 is simultaneously sheathed on helical wheel shaft 4, and fixed plate 8 is located at the lower section of movable axle bed 6 and is sheathed on helical wheel shaft
On 4, an axle bed lantern ring 9 is arranged on movable axle bed 6 and fixed plate 8 respectively, the screw rod 7 sequentially passes through two axle bed sets
Ring 9 is simultaneously connect with two axle bed collar threads 9 respectively, and the preferably each axle bed lantern ring 9 of the present embodiment is used to be arranged including one can
The big hole and a small sircle hole for being threadedly coupled with screw rod 7 of moving axis seat 6 or fixed plate 8, as shown in Figure 3.This is adjustable
The working principle of component is: fixed plate 8 is motionless on helical wheel shaft 4 to be fixed on, and adjusts movable axle bed by rotating screw rod 7
6 upper and lower position, since helical gear 3 is fixed by the movable axle bed 6 for being tightly attached to lower end, therefore when movable 6 upper and lower position of axle bed becomes
When change, the upper and lower position of helical gear 3 changes, and flexibly changes the fortune of engine valve according to various practical working situations in this way
Dynamic state, to find engine behavior the most suitable, working method.
In the present embodiment, the screw thread on the helical gear 3 is the screw thread for protruding from helical wheel outer surface or indent in helical
The screw thread of wheel outer surface, the screw thread of the screw thread or indent that either protrude, as long as can guarantee rocker arm 1 smoothly in helical gear 3
On threadingly move.
The present embodiment additionally provides a kind of control method based on variable valve timing-lift device described above, passes through
Crankshaft on engine carries out driving to helical wheel shaft 4 and helical gear 3 is driven to convert rocker arm 1 around the rotation of helical wheel shaft for itself
Vertical reciprocating motion, thus drive valve 10 it is anticipated that frequency open and close.
Further, specifically comprise the following steps:
Under the drive of helical gear 3, one end that rocker arm 1 is bonded with helical gear is up moved, and is moved down so that valve 10 is whole,
Since the lower end of extension spring 11 is fixedly connected on the attachment base 15 being fixed on valve column 13, upper end is fixedly connected on
It is scheduled on the spring base 12 in cylinder head, therefore the stretching of extension spring 11 is opened, valve is opened, and is specifically referred to valve cap 14 here and is beaten
It opens.
When one end that rocker arm 1 is bonded with helical gear reaches highest point, under the tensile force effect of extension spring 11, rocker arm
1 one end being bonded with helical gear falls to rapidly the bottom of helical gear 3, and extension spring 11 restores reset condition, valve-closing,
Here the closing of valve cap 14 is specifically referred to.
According to above-mentioned steps iterative motion, the opening and closing to valve are realized.
The present invention also provides a kind of engines, including variable valve timing-lift device described above.
Above only describes basic principle of the invention and preferred embodiment, those skilled in the art can be according to foregoing description
Many changes and improvements are made, these changes and improvements should be within the scope of protection of the invention.
Claims (9)
1. a kind of variable valve timing-lift device characterized by comprising
Rocker arm assembly, the rocker arm assembly include rocker arm (1) and rocker arm shaft (2), and rocker arm shaft (2) are set in the middle part of rocker arm (1)
Above and around rocker arm shaft (2) rotate upwardly and downwardly；
Be set to the valve assembly of rocker arm (1) one end, the valve assembly include the spring base (12) being fixed in cylinder head and
Through the valve (10) of spring base, valve (10) includes valve column (13), valve cap (14) and is fixed on valve column
(13) attachment base (15) on is equipped with extension spring (11) between spring base (12) and attachment base (15), extension spring (11)
Upper end is fixedly connected with spring base (12), lower end is fixedly connected with attachment base (15)；And
It is set to the helical wheel assembly of rocker arm (1) other end, the helical wheel assembly includes helical wheel shaft (4) and is set to helical
Helical gear (3) on wheel shaft (4), the other end of rocker arm (1) are fitted on the screw thread of helical gear (3) and are threadingly moved.
2. variable valve timing-lift device according to claim 1, which is characterized in that rocker arm (1) and helical gear (3)
One end of fitting is set as spherical.
3. variable valve timing-lift device according to claim 1 or 2, which is characterized in that the helical gear (3) is logical
Key (5) is crossed to connect with helical wheel shaft (4).
4. variable valve timing-lift device according to claim 3, which is characterized in that further include being set to helical gear (3)
Lower section and for adjusting the adjustable component of helical gear height, the adjustable component include movable axle bed (6), fixed plate (8) and
Screw rod (7), movable axle bed (6) are close to the lower end of helical gear (3) and are sheathed on helical wheel shaft (4), and fixed plate (8) is located at can
The lower section of moving axis seat (6) is simultaneously sheathed on helical wheel shaft (4), is arranged with one respectively in movable axle bed (6) and fixed plate (8)
Axle bed lantern ring (9), the screw rod (7) sequentially pass through two axle bed lantern rings (9) and are threadedly coupled respectively with two axle bed lantern rings.
5. variable valve timing-lift device according to claim 4, which is characterized in that each axle bed lantern ring (9) includes
One big hole and a roundlet for being threadedly coupled with screw rod (7) for being arranged movable axle bed (6) or fixed plate (8)
Hole.
6. variable valve timing-lift device according to claim 1, which is characterized in that the spiral shell on the helical gear (3)
Line is the screw thread for protruding from helical wheel outer surface or indent in the screw thread of helical wheel outer surface.
7. a kind of control method based on any one of the claim 1-6 variable valve timing-lift device, feature exist
In, comprising: drive helical gear (3) to convert itself to around the rotation of helical wheel shaft and shake by carrying out driving to helical wheel shaft (4)
The vertical reciprocating motion of arm (1), thus drive valve (10) it is anticipated that frequency open and close.
8. control method according to claim 7, which is characterized in that specifically comprise the following steps:
Under the drive of helical gear (3), one end that rocker arm (1) is bonded with helical gear is up moved, and extension spring (11) are stretched
It opens, valve is opened；
When one end that rocker arm (1) is bonded with helical gear reaches highest point, under the tensile force effect of extension spring (11), rocker arm
(1) one end being bonded with helical gear falls to rapidly the bottom of helical gear (3), valve-closing；
According to above-mentioned steps iterative motion, the opening and closing to valve are realized.
9. a kind of engine, which is characterized in that including variable valve timing as claimed in any one of claims 1 to 6-lift dress
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141286.8A CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910141286.8A CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109779715A true CN109779715A (en) | 2019-05-21 |
| CN109779715B CN109779715B (en) | 2020-01-17 |
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ID=66486440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910141286.8A Active CN109779715B (en) | 2019-02-26 | 2019-02-26 | Variable gas distribution timing-lift device and control method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343224A (en) * | 2002-05-27 | 2003-12-03 | Kyowa Metal Work Co Ltd | Variable valve train of internal combustion engine |
| CN102400733A (en) * | 2010-09-07 | 2012-04-04 | 本田技研工业株式会社 | Variable Air Valve System For Combustion Motor |
| CN103670579A (en) * | 2013-11-29 | 2014-03-26 | 长城汽车股份有限公司 | Mechanism for continuously adjusting engine valve lift |
| CN103711541A (en) * | 2012-09-28 | 2014-04-09 | 本田技研工业株式会社 | Variable valve of internal combustion engine |
| JP2015040508A (en) * | 2013-08-22 | 2015-03-02 | スズキ株式会社 | Variable valve device of internal combustion engine |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
| WO2017131538A1 (en) * | 2016-01-27 | 2017-08-03 | Gawryś Marek | Spiral drive mechanism, particularly for mechanical vehicles, land and marine machines |
-
2019
- 2019-02-26 CN CN201910141286.8A patent/CN109779715B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003343224A (en) * | 2002-05-27 | 2003-12-03 | Kyowa Metal Work Co Ltd | Variable valve train of internal combustion engine |
| CN102400733A (en) * | 2010-09-07 | 2012-04-04 | 本田技研工业株式会社 | Variable Air Valve System For Combustion Motor |
| CN103711541A (en) * | 2012-09-28 | 2014-04-09 | 本田技研工业株式会社 | Variable valve of internal combustion engine |
| JP2015040508A (en) * | 2013-08-22 | 2015-03-02 | スズキ株式会社 | Variable valve device of internal combustion engine |
| CN103670579A (en) * | 2013-11-29 | 2014-03-26 | 长城汽车股份有限公司 | Mechanism for continuously adjusting engine valve lift |
| WO2017131538A1 (en) * | 2016-01-27 | 2017-08-03 | Gawryś Marek | Spiral drive mechanism, particularly for mechanical vehicles, land and marine machines |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
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| Publication number | Publication date |
|---|---|
| CN109779715B (en) | 2020-01-17 |
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