CN108757081A - Camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom - Google Patents
Camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom Download PDFInfo
- Publication number
- CN108757081A CN108757081A CN201810493030.9A CN201810493030A CN108757081A CN 108757081 A CN108757081 A CN 108757081A CN 201810493030 A CN201810493030 A CN 201810493030A CN 108757081 A CN108757081 A CN 108757081A
- Authority
- CN
- China
- Prior art keywords
- rocking arm
- controlled
- camshaft
- cam
- lever spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom, belongs to engine valve actuations field.The variable valve actuator for air includes valve assembly, cam, output rocking arm, drive link, controlled rocking arm, master axis and priming lever spring.The controlled terminal of controlled rocking arm is adjusted by master axis, and priming lever spring, which provides spring force, drives the driving end of controlled rocking arm to be contacted with the cam moment, and cam is swung by controlled rocking arm, drive link driving output rocking arm.The variable valve actuator for air realizes the valve lift curve of continuous variable by the phase of adjusting master axis, realizes that the low oil consumption of camshaft type engine, low emission, high power output are set in bottom；The rational design of each modular construction size is met when either working, or when adjusting, good contact is kept between each component, be not in gap or redundancy, prolong the service life, reduce operation noise and ensure that engine is air tight, and each simple easy processing of component reduces processing cost.
Description
Technical field
The present invention relates to a kind of bottoms to set camshaft Duo Gan continuous variable valves mechanism, belongs to engine valve actuations field.
Background technology
Gasoline engine uses throttle control load, and at low load, pumping loss is big；Diesel engine non-air throttle, pump
Gas loss is small compared with gasoline engine.For diesel engine, changeable air valve technology can significantly improve gasoline engine performance.Research shows that：
The variable degree of flexibility of valve is higher, and it is also higher that engine performance improves degree.Currently, all kinds of continuous variable valves（CVVL）Technology
It has application on the gasoline engine of overhead camshaft type middle and high end, changeable air valve technology is not applied on a diesel engine substantially.
Although diesel engine quantity is few compared with gasoline engine, its loading capacity is big, mileage travelled is long, the oil consumption of diesel engine, PM,
NOx emission is serious.With increasingly strict, Miller cycle, new combustion mode, double fuel etc. of engine fuel consumption and emission regulation
Technology is applied to diesel engine, these technologies are required for the support of variable valve actuator for air.Diesel engines at present mostly use greatly bottom set it is convex
Wheel shaft type valve actuating mechanism, structure are mostly that cam drives two valve assemblies by enduring cup, push rod, rocking arm, air valve bridge；Gasoline
Machine mostly uses greatly overhead camshaft type valve actuating mechanism, and structure is mostly that cam drives a valve group by enduring cup or rocking arm
Part, therefore, there are huge differences for stressing conditions between the structure of the two, each component etc..For gasoline engine CVVL mechanisms without
Method directly applies to diesel engine, and it is imperative that cam axle type variable valve actuator for air is set at exploitation bottom.
In addition, in high performance CVVL mechanisms design, it is necessary to meet claimed below：When either working, or when adjusting,
When cam base circle section and subsequent parts contact, holding is not in the good contact of gap or redundancy between each component.
If there is gap, then it will appear repeated stock when running, structural strength and reliability will be greatly lowered in this, improve operation and make an uproar
Sound grade；If there is redundancy, then valve can not completely close, this will lead to engine gas leakage, engine performance deterioration, even
Influence engine life.It is a set of to meet above-mentioned requirements and camshaft continuous variable valve mechanism is set at the bottom of the simple easy processing of each component
Imperative, processing cost will be greatly lowered in successfully exploitation, prolong the service life, and reduce operation noise.
Invention content
It is an object of the invention to：Camshaft Duo Gan continuous variable valves mechanism is set by a kind of bottom of design, for realizing：
（a）Camshaft type engine performance is set in order to improve bottom, the mechanism is needed to realize the valve lift curve of continuous variable；（b）For
Prolong the service life, reduce operation noise and ensure that engine is air tight, when the mechanism being needed either to work, or adjusts
When section, keep being not in the good of gap or redundancy when cam base circle section and subsequent parts contact, between each component
Contact；（c）In order to reduce processing cost, each component should easy processing as simple as possible.
The technical solution adopted by the present invention is：Camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom, it includes valve
Component and cam, it further includes output rocking arm, drive link, controlled rocking arm, master axis and priming lever spring；The quilt of the controlled rocking arm
Control end is adjusted by master axis；The priming lever spring, which provides spring force, drives the driving end of controlled rocking arm to be contacted with the cam moment；Institute
Cam is stated to swing by controlled rocking arm, drive link driving output rocking arm；The output curved surface exported on rocking arm drives valve assembly.
The priming lever spring uses the first priming lever spring of spiral-shaped structure, the setting of the first priming lever spring to be shaken in the first output
The cantilever end of arm.
The priming lever spring uses the second priming lever spring of torsion type structure, the second priming lever spring to be positioned close to drive link
Controlled rocking arm upper position.
The beneficial effects of the invention are as follows：This bottom set camshaft Duo Gan continuous variable valves mechanism include valve assembly, it is convex
Wheel, output rocking arm, drive link, controlled rocking arm, master axis and priming lever spring.The controlled terminal of controlled rocking arm is adjusted by master axis, is shaken
Arm spring, which provides spring force, drives the driving end of controlled rocking arm to be contacted with the cam moment, and cam is driven by controlled rocking arm, drive link
Dynamic output rocking arm is swung.The variable valve actuator for air realizes the valve lift curve of continuous variable by the phase of adjusting master axis,
Realize that the low oil consumption of camshaft type engine, low emission, high power output are set in bottom；The rational design of each modular construction size is met
When either working, or when adjusting, good contact is kept between each component, is not in gap or redundancy, extension makes
It with the service life, reduces operation noise and ensures that engine is air tight, and the simple easy processing of each component, reduce processing cost.
Description of the drawings
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural schematic diagram that camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom.
Fig. 2 is the structural schematic diagram that camshaft Duo Gan continuous variable valves mechanism is set at another bottom.
In figure：1, valve assembly, the 2, air valve bridge, 3, first output rocking arm, 3a, the second output rocking arm, 31, output curved surface,
32, fixing end, 33, input terminal, 4, drive link, 5, controlled rocking arm, 51, controlled terminal, 52, driving end, 53, output end, 6, cam,
7, master axis, the 8, first priming lever spring, 8a, the second priming lever spring.
Specific implementation mode
Fig. 1,2 show that the structure chart of camshaft Duo Gan continuous variable valves mechanism is set at bottom.In figure, camshaft is set at this bottom
Duo Gan continuous variable valves mechanism includes valve assembly 1, cam 6, output rocking arm, drive link 4, controlled Rocker arm 5,7 and of master axis
Priming lever spring.The controlled terminal 51 of controlled Rocker arm 5 is adjusted by master axis 7.Priming lever spring provides the drive that spring force drives controlled Rocker arm 5
Moved end 52 is contacted with 6 moment of cam.Cam 6 is swung by controlled Rocker arm 5, the driving output rocking arm of drive link 4；It exports on rocking arm
It exports curved surface 31 and drives valve assembly 1.
Fig. 1 shows that priming lever spring uses the first priming lever spring 8 of spiral-shaped structure, and the setting of the first priming lever spring 8 is the
The cantilever end of one output rocking arm 3.
Fig. 2 shows priming lever springs using the second priming lever spring 8a of torsion type structure, and the second priming lever spring 8a settings exist
Close to the upper position of the controlled Rocker arm 5 of drive link 4.
Using above-mentioned technical solution, the multiple valve assemblies of the driving such as air valve bridge are arranged for multivalve engine.In order to
When realization either works or adjusts, good contact is kept between each component, is not in gap or redundancy, extension makes
It with the service life, reduces operation noise and ensures that engine is air tight, and the simple easy processing of each component, reduce processing cost.It is defeated
It includes inoperative section and active section to go out curved surface, and inoperative segment type line is the center of circle of the fixing end to export rocking arm as the circle in the center of circle
Arc.
Claims (3)
1. camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom, it includes valve assembly（1）And cam（6）, it is characterized in that：
It further includes output rocking arm, drive link（4）, controlled rocking arm（5）, master axis（7）And priming lever spring；The controlled rocking arm（5）'s
Controlled terminal（51）By master axis（7）It adjusts；The priming lever spring provides spring force and drives controlled rocking arm（5）Driving end（52）With
Cam（6）Moment contacts；The cam（6）By being controlled rocking arm（5）, drive link（4）Driving output rocking arm is swung；Export rocking arm
On output curved surface（31）Drive valve assembly（1）.
2. camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom according to claim 1, it is characterized in that：The rocking arm
Spring uses the first priming lever spring of spiral-shaped structure（8）, the first priming lever spring（8）Setting exports rocking arm first（3）It is outstanding
Arm end.
3. camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom according to claim 1, it is characterized in that：The rocking arm
Spring uses the second priming lever spring of torsion type structure（8a）, the second priming lever spring（8a）It is positioned close to drive link（4）Quilt
Control rocking arm（5）Upper position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493030.9A CN108757081B (en) | 2018-05-22 | 2018-05-22 | Multi-rod continuously variable valve mechanism with bottom camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493030.9A CN108757081B (en) | 2018-05-22 | 2018-05-22 | Multi-rod continuously variable valve mechanism with bottom camshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108757081A true CN108757081A (en) | 2018-11-06 |
| CN108757081B CN108757081B (en) | 2021-06-08 |
Family
ID=64007529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810493030.9A Active CN108757081B (en) | 2018-05-22 | 2018-05-22 | Multi-rod continuously variable valve mechanism with bottom camshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108757081B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT522750A1 (en) * | 2019-07-04 | 2021-01-15 | Avl List Gmbh | VARIABLE VALVE DRIVE DEVICE |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092269A1 (en) * | 2003-10-31 | 2005-05-05 | Caterpillar Inc. | Engine valve actuation system |
| US20100269773A1 (en) * | 2009-04-22 | 2010-10-28 | Gm Global Technology Operations, Inc. | Valvetrain for overhead valve engine |
| CN102859131A (en) * | 2010-04-19 | 2013-01-02 | 斯堪尼亚商用车有限公司 | Valve lift device for a combustion engine |
| EP3073070A1 (en) * | 2015-03-25 | 2016-09-28 | Caterpillar Energy Solutions GmbH | Camshaft based variable valve timing |
| CN106762008A (en) * | 2016-11-14 | 2017-05-31 | 辽宁工业大学 | A kind of continuous variable valve drive device and its control method |
| CN108049931A (en) * | 2017-11-29 | 2018-05-18 | 大连理工大学 | A kind of change mode continuous variable valve actuator for air |
-
2018
- 2018-05-22 CN CN201810493030.9A patent/CN108757081B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050092269A1 (en) * | 2003-10-31 | 2005-05-05 | Caterpillar Inc. | Engine valve actuation system |
| US20100269773A1 (en) * | 2009-04-22 | 2010-10-28 | Gm Global Technology Operations, Inc. | Valvetrain for overhead valve engine |
| CN102859131A (en) * | 2010-04-19 | 2013-01-02 | 斯堪尼亚商用车有限公司 | Valve lift device for a combustion engine |
| EP3073070A1 (en) * | 2015-03-25 | 2016-09-28 | Caterpillar Energy Solutions GmbH | Camshaft based variable valve timing |
| CN106762008A (en) * | 2016-11-14 | 2017-05-31 | 辽宁工业大学 | A kind of continuous variable valve drive device and its control method |
| CN108049931A (en) * | 2017-11-29 | 2018-05-18 | 大连理工大学 | A kind of change mode continuous variable valve actuator for air |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT522750A1 (en) * | 2019-07-04 | 2021-01-15 | Avl List Gmbh | VARIABLE VALVE DRIVE DEVICE |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108757081B (en) | 2021-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8789502B2 (en) | Variable valve actuation system and method using variable oscillating cam | |
| US7451729B2 (en) | Variable valve mechanism | |
| WO2018223798A1 (en) | Dual-camshaft switch fulcrum-type variable mode valve driving system | |
| CN102889103A (en) | Positive control desmodromic valve systems for internal combustion engines | |
| WO2012112817A1 (en) | Variable valve actuation system and method using variable oscillating cam | |
| CN103256124B (en) | A kind of valve control method of cylinder deactivation engine in turn | |
| CN104121054A (en) | Piston engine valve timing and variable lift driving system | |
| WO2009151352A1 (en) | Late miller internal combustion engine | |
| CN110374707A (en) | A kind of continuous variable lift device, engine and automobile | |
| CN102071982B (en) | Mobile rocker arm shaft type variable valve timing mechanism | |
| CN105507979A (en) | Continuous variable valve lift system and automobile | |
| CN108757081A (en) | Camshaft Duo Gan continuous variable valves mechanism is set at a kind of bottom | |
| CN107642384B (en) | Continuous variable valve mechanism | |
| CN101922392A (en) | Engine fuel pump drive system | |
| CN105715323A (en) | Engine valve movement switching mechanism | |
| US6588386B2 (en) | Variable valve lift system | |
| CN102278162A (en) | Variable valve lift mechanism | |
| CN102966391B (en) | Swinging arm mechanism controlled by using double cams | |
| CN203962063U (en) | A kind of valve actuating mechanism | |
| CN108757082A (en) | Camshaft continuous variable valve mechanism is set at a kind of bottom | |
| CN1948721A (en) | Three air valve motorcycle motor variable air inlet valve air distribution device | |
| CN107762587A (en) | Executing agency, variable air valve lift apparatus, engine and automobile | |
| CN102678214B (en) | The full Variable Valve Time of independent double swing-bar and lift mechanisms | |
| CN101705852A (en) | Automobile engine valve lift two-stage adjustable air distributing method and device | |
| CN220955745U (en) | Diesel engine camshaft structure capable of effectively reducing noise |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |