CN106194306B - Air valve bridge and Rocker arm assembly and engine including the air valve bridge and Rocker arm assembly - Google Patents
Air valve bridge and Rocker arm assembly and engine including the air valve bridge and Rocker arm assembly Download PDFInfo
- Publication number
- CN106194306B CN106194306B CN201610706120.2A CN201610706120A CN106194306B CN 106194306 B CN106194306 B CN 106194306B CN 201610706120 A CN201610706120 A CN 201610706120A CN 106194306 B CN106194306 B CN 106194306B
- Authority
- CN
- China
- Prior art keywords
- air valve
- valve bridge
- pin
- rocker arm
- arm assembly
- 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.)
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
-
- 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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
Abstract
The invention discloses a kind of air valve bridge and Rocker arm assembly, including air valve bridge ontology and rocking arm, the air valve bridge ontology is equipped with plunger shaft, executes pin installation cavity, the piston being set in the plunger shaft and be arranged in the execution pin executed in pin installation cavity；It is equipped with elastic component between the execution pin and execution pin installation cavity, under the elastic force effect of the elastic component, the upper end for executing pin stretches out in the execution pin installation cavity；The air valve bridge ontology is equipped with the first draining road being connected with the plunger shaft, execution pin is internally provided with the second draining road that one end is connected with the oil back chamber of engine；The rocking arm is equipped with bulge-structure corresponding with the execution pin.So set, the present invention provides air valve bridge and Rocker arm assembly, the technical issues of sealing device and air valve bridge gouging abrasion and sealing device difficult arrangement can be avoided.
Description
Technical field
The present invention relates to engine fittings technical field, more specifically to a kind of air valve bridge and Rocker arm assembly and
Engine including the air valve bridge and Rocker arm assembly.
Background technology
When automobile is in lower long slope, driver's startup engine braking apparatus, oil supply system fuel cut-off, while engine exists
When compression stroke is close to top dead centre, under engine braking apparatus driving, by one small lift (1~2mm) of exhauxt valve opens,
Compressed high pressure gas in cylinder is discharged rapidly, inner pressure of air cylinder reduces rapidly, therefore in next expansion stroke,
Engine does not do work externally substantially.
Wherein, air valve bridge is installed on the top of valve of the same name, and for transmitting the power of rocking arm, guarantee opens simultaneously same reputation
Door.When engine works, with the rotation of camshaft, power is rotated by tappet, push rod, driving rocking arm around rocker arm shaft, rocking arm
Air valve bridge is driven to open valve.
Air valve bridge in the prior art executes piston 1 as shown in Figure 1, equipped with plunger shaft in the air valve bridge at braking valve end
Mounted on the inside of plunger shaft, the top for executing piston 1 is machined with oil leak hole 2, and the oil in air valve bridge is discharged by the hole.
When braking process, due to needing to establish hydraulic connecting, it is therefore desirable to which sealing device 3 seals the hole.
And when engine is in main exhaust, air valve bridge integrally moves downward, and air valve bridge is detached from sealing device 3, internal
High pressure oil just release.
However, current air valve bridge needs to increase the sealing device of individual oil leak hole, it be easy to cause sealing device and gas
Raft of pontoons gouging abrasion, and difficult arrangement influence the reliability of engine.
Therefore, the technical issues of sealing device is with air valve bridge gouging abrasion and sealing device difficult arrangement how is avoided,
As those skilled in the art's important technological problems to be solved.
Invention content
In view of this, the present invention provides a kind of air valve bridge and Rocker arm assembly, sealing device and air valve bridge can be avoided
The technical issues of gouging abrasion and sealing device difficult arrangement.The present invention also provides one kind including above-mentioned air valve bridge and to shake
The engine of arm assembly.
A kind of air valve bridge and Rocker arm assembly provided by the invention, including air valve bridge ontology and rocking arm, the air valve bridge ontology
It is equipped with plunger shaft, executes pin installation cavity, the piston being set in the plunger shaft and setting in execution pin installation cavity
Interior execution pin；It is equipped with elastic component between the execution pin and execution pin installation cavity, is acted in the elastic force of the elastic component
Under, the upper end for executing pin stretches out in the execution pin installation cavity；The air valve bridge ontology is equipped with and the plunger shaft phase
The first draining road, the execution pin of connection are internally provided with the second draining road that one end is connected with the oil back chamber of engine；Institute
It states rocking arm and is equipped with bulge-structure corresponding with the execution pin；
When the camshaft of engine is in main exhaust lift and when driving the air valve bridge to move downward by the rocking arm, institute
State bulge-structure and press executions and sell and move downward, before reaching maximum valve lift, first draining road with it is described
Second draining road is connected, so that the pressure oil of the piston is drawn off.
Preferably, the execution pin and execution pin mounting hole are clearance fit.
Preferably, described to execute pin be top is the step structures that small diameter portion, lower part are large-diameter portion, and the executions pin is pacified
The upper port for filling hole is more than the diameter of the small diameter portion, less than the diameter of the large-diameter portion.
Preferably, the upper end for executing pin mounting hole is fixed with setting-up piece by screw, and the setting-up piece is equipped with
Through-hole, with formed it is described execute pin mounting hole upper port.
Preferably, the elastic component is to be connected between the upper end for executing pin mounting hole and the upper end for executing pin
Spring.
Preferably, the lower end for executing pin mounting hole is equipped with the spring base for installing the spring.
Preferably, the plunger shaft includes the main piston chamber and auxiliary piston chamber being arranged in the air valve bridge ontology, the master
Plunger shaft is interior equipped with main piston, and the auxiliary piston chamber is interior to be equipped with auxiliary piston, and the air valve bridge ontology is equipped with for the pair to be lived
The pressure oil duct that the top of plug chamber is connected with the main piston chamber, the press section of the rocking arm are corresponding with the main piston.
Preferably, the rocking arm press the main piston torque arm length be less than the rocking arm press it is described execute pin power
Arm lengths.
The present invention also provides a kind of engines, are equipped with air valve bridge and Rocker arm assembly, the air valve bridge and Rocker arm assembly are
Air valve bridge and Rocker arm assembly as described above.
In technical solution provided by the invention, when engine positive power, solenoid valve is closed, and brake circuit does not work, when
When engine needs braking, brake circuit conducting.Lubricating oil just flows on the piston of air valve bridge at this time, living under the action of oil pressure
Plug overcomes spring force, spring-compressed, brake pressure oil to be put into inside plunger shaft.When camshaft goes to braking lift, driving
Rocking arm rotates, and then rocking arm driving piston moves down, and to open braking valve, compressed gas is discharged in cylinder, energy
Amount discharges, to realize cylinder inside brake.
It is important to note that when camshaft drives piston, piston and valve in main exhaust lift, rocking arm in the present invention
Bridge body contacts, to drive entire air valve bridge to move downward.At this point, due on the bulge-structure and air valve bridge ontology on rocking arm
Execution pin contacts, push execute pin moving downward, before reaching maximum valve lift, the first draining road and the second draining road
It is connected, so that the pressure oil of piston is drawn off.
So set, technical solution provided by the invention, need not be arranged sealing device and be carried out to the hydraulic pressure in air valve bridge
Sealing or release, can also complete engine braking and engine and normally export acting, and then avoid because sealing device is arranged,
Caused by sealing device and air valve bridge gouging abrasion and sealing device difficult arrangement the technical issues of.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is air valve bridge schematic diagram in the prior art；
Fig. 2 is the schematic internal view of air valve bridge in the specific embodiment of the invention；
Fig. 3 is air valve bridge and rocking arm cooperation schematic diagram in the specific embodiment of the invention.
In Fig. 2 and Fig. 3：
Air valve bridge ontology -11, auxiliary piston -13, execute pin -14, elastic component -15, the first draining at main piston -12
Road -16, the second draining road -17, push rod -18, rocking arm -19, bulge-structure -20, setting-up piece -21.
Specific implementation mode
Present embodiment provides a kind of air valve bridge and Rocker arm assembly, sealing device can be avoided to be touched with air valve bridge
The technical issues of hitting abrasion and sealing device difficult arrangement.It includes above-mentioned valve that present embodiment, which additionally provides a kind of,
The engine of bridge and Rocker arm assembly.
Hereinafter, being illustrated to embodiment with reference to attached drawing.In addition, embodiments illustrated below is not to recorded in claim
Invention content rise any restriction effect.In addition, the full content of the composition represented by following example is not limited to as right
It is required that necessary to the solution of recorded invention.
It please refers to Fig.2 and Fig. 3, air valve bridge provided in this embodiment includes air valve bridge ontology 11, set on air valve bridge ontology 11
It is useful for control valve opening or the main piston 12 of closing, certainly, in order to control multiple valves simultaneously, in air valve bridge ontology
Auxiliary piston 13 is also provided on 11.In order to reach synchronous control, for install the main piston chamber of main piston 12 with for installing
The top of the auxiliary piston chamber of auxiliary piston 13 is preferably connected by pressure oil duct, when in main piston 12 filled with pressure oil, pressure
Power oil enters auxiliary piston chamber simultaneously by pressure oil duct, and then can control the movement of auxiliary piston 13 simultaneously, realizes hyperpneustic same
When control.
In the present embodiment, it is additionally provided with execution pin installation cavity on air valve bridge ontology 11 and is arranged in execution pin installation cavity
Execute pin 14.
It executes and is equipped with elastic component 15 between pin 14 and execution pin installation cavity, under the elastic force effect of elastic component 15, execute pin
14 upper end stretches out in execution pin installation cavity；Air valve bridge ontology 11 is equipped with the to be connected with auxiliary piston chamber or main piston chamber
One draining road 16, the second draining road 17 for being internally provided with one end and being connected with the oil back chamber of engine for executing pin 14.
When the camshaft of engine drives main piston 12, main piston 12 and air valve bridge ontology in main exhaust lift, rocking arm 19
Contact, to drive entire air valve bridge to move downward.At this point, due on the bulge-structure 20 and air valve bridge ontology on rocking arm 19
It executes pin 14 to contact, pushes execution pin 14 to move downward, before reaching maximum valve lift, the first draining road 16 is let out with second
Oil duct 17 is connected, so that the pressure oil of piston is drawn off.
It should be noted that when engine works in the present embodiment, with the rotation of camshaft, power can pass through tappet
(not shown), push rod 18, to drive rocking arm 19 to be rotated around rocker arm shaft, rocking arm 19 drives air valve bridge to open valve.
When engine positive power, brake circuit does not work, and when engine needs braking, driver presses the startup of braking
Button, solenoid valves, brake circuit are got through.At this point, what lubricating oil will be in contact with it along the arrival of the oil circuit in rocking arm 19
The main piston intracavitary of air valve bridge.Oil pressure can overcome the spring force in main piston 12, spring-compressed, brake pressure oil to be put at this time
Main piston intracavitary portion.After full of entire main piston chamber, main piston 12 can integrally float, while pressure oil passes through air valve bridge sheet
Pressure oil duct in body 11 enters the top of auxiliary piston chamber；When due to installation, between being reserved centainly between rocking arm 19 and air valve bridge
Gap, main piston 12 float, and driving rocking arm 19 rotates counterclockwise, until the gap is eaten up, it is major and minor in entire air valve bridge at this time
Piston 13 connects for pressure oil.When camshaft goes to braking lift, driving rocking arm 19 rotates clockwise, and main piston 12 is to moving down
Dynamic, since hydraulic connecting may be considered rigid connection, main piston 12, which moves down, will drive auxiliary piston 13 to moving down
It is dynamic, to open braking valve, compressed gas is discharged in cylinder, energy is discharged, to realize cylinder inside brake.
When camshaft is in main exhaust lift, rocking arm 19 drives main piston 12 to move downward, to drive entire air valve bridge
It moves downward, at this point, the bulge-structure 20 on rocking arm 19 is contacted with pin 14 is executed, pushes execution pin 14 to move downward, reaching
Before maximum valve lift, the first draining road 16 is connected to the second draining road 17, and pressure oil is let out from the first draining road 16 and second
Oil duct 17 flows out, and realizes oil draining function, this ensure that braking exhaust valve lift and non-brake exhaust valve lift under on-position
It is identical.
In the present embodiment, the upper end of air valve bridge ontology 11 is machined with execution pin mounting hole, executes pin 14 for installing, executes
Pin 14 moves up and down vertically, it is contemplated that frictional heat expands, and should design execution 14 side of pin and match for gap with pin mounting hole is executed
It closes, causes air valve bridge ontology 11 in order to avoid friction temperature is excessively high and execute the abrasion of pin 14, influence to work normally.On execution pin 14 is vertical
Lower movement simultaneously constantly contacts friction with bulge-structure 20, therefore execution pin 14 need to have higher hardness, ensure its wearability, usually
To executing the processing of 14 integral quenching of pin.
In addition, in order to which spacer pin to be reliably mounted in spacer pin mounting hole, executing the preferably lower part of pin 14 is
Large-diameter portion, top are the step structures of small diameter portion, and the upper port for executing pin mounting hole is more than the diameter of small diameter portion, is less than major diameter
The diameter in portion.
In order to facilitate the installation of, setting-up piece 21, setting-up piece can be fixed with by screw by executing the upper end of pin mounting hole
21 are equipped with through-hole, to form the upper port for executing pin mounting hole.
It is further to note that mounted on executing pin 14 and executing the elastic component 15 between pin mounting hole, it can be specific
For the spring being connected between the upper end and the upper end for executing pin 14 that execute pin mounting hole.It specifically, in order to facilitate the installation of, can be with
It is equipped in the upper end for executing pin mounting hole for pacifying spring-loaded spring base.
Present embodiment additionally provides a kind of engine, is equipped with air valve bridge and Rocker arm assembly, the air valve bridge and rocking arm
Assembly is the air valve bridge and Rocker arm assembly described in specific implementation mode as above.So set, what present embodiment provided
Engine can avoid the technical issues of sealing device is with air valve bridge gouging abrasion and sealing device difficult arrangement.This has
The derivation of the derivation of beneficial effect and advantageous effect caused by air valve bridge in above-mentioned specific implementation mode and Rocker arm assembly
Cheng great Ti is similar, therefore repeats no more herein.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (9)
1. a kind of air valve bridge and Rocker arm assembly, which is characterized in that including air valve bridge ontology and rocking arm, set on the air valve bridge ontology
There is plunger shaft, execute pin installation cavity, the piston being set in the plunger shaft and be arranged in execution pin installation cavity
Execute pin；It is equipped with elastic component between the execution pin and execution pin installation cavity, under the elastic force effect of the elastic component, institute
It states the upper end for executing and selling and stretches out in the execution pin installation cavity；The air valve bridge ontology, which is equipped with, to be connected with the plunger shaft
First draining road, execution pin are internally provided with the second draining road that one end is connected with the oil back chamber of engine；The rocking arm
Equipped with bulge-structure corresponding with the execution pin；
It is described convex when the camshaft of engine is in main exhaust lift and when driving the air valve bridge to move downward by the rocking arm
The structure pressing execution pin is played to move downward, before reaching maximum valve lift, first draining road and described second
Draining road is connected, so that the pressure oil of the piston is drawn off.
2. air valve bridge as described in claim 1 and Rocker arm assembly, which is characterized in that the execution pin is installed with execution pin
Chamber is clearance fit.
3. air valve bridge as described in claim 1 and Rocker arm assembly, which is characterized in that execution pin be top be small diameter portion, under
Portion is the step structure of large-diameter portion, and the upper port for executing pin installation cavity is more than the diameter of the small diameter portion, less than described
The diameter of large-diameter portion.
4. air valve bridge as claimed in claim 3 and Rocker arm assembly, which is characterized in that the upper end for executing pin installation cavity passes through
Screw is fixed with setting-up piece, and the setting-up piece is equipped with through-hole, to form the upper port for executing pin installation cavity.
5. air valve bridge as described in claim 1 and Rocker arm assembly, which is characterized in that the elastic component is to be connected to the execution
Sell the spring between the upper end of installation cavity and the upper end for executing pin.
6. air valve bridge as claimed in claim 5 and Rocker arm assembly, which is characterized in that the lower end for executing pin installation cavity is equipped with
Spring base for installing the spring.
7. air valve bridge as claimed in any one of claims 1 to 6 and Rocker arm assembly, which is characterized in that the plunger shaft includes setting
In the main piston chamber and auxiliary piston chamber of the air valve bridge ontology, the main piston intracavitary is equipped with main piston, in the auxiliary piston chamber
Equipped with auxiliary piston, the air valve bridge ontology is equipped with the pressure for the top of the auxiliary piston chamber to be connected with the main piston chamber
Power oil duct, the press section of the rocking arm are corresponding with the main piston.
8. air valve bridge as claimed in claim 7 and Rocker arm assembly, which is characterized in that the rocking arm presses the power of the main piston
Arm lengths are less than the rocking arm and press the torque arm length for executing pin.
9. a kind of engine is equipped with air valve bridge and Rocker arm assembly, which is characterized in that the air valve bridge and Rocker arm assembly is such as rights
It is required that 1-8 any one of them air valve bridge and Rocker arm assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706120.2A CN106194306B (en) | 2016-08-23 | 2016-08-23 | Air valve bridge and Rocker arm assembly and engine including the air valve bridge and Rocker arm assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610706120.2A CN106194306B (en) | 2016-08-23 | 2016-08-23 | Air valve bridge and Rocker arm assembly and engine including the air valve bridge and Rocker arm assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106194306A CN106194306A (en) | 2016-12-07 |
| CN106194306B true CN106194306B (en) | 2018-08-07 |
Family
ID=57524827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610706120.2A Active CN106194306B (en) | 2016-08-23 | 2016-08-23 | Air valve bridge and Rocker arm assembly and engine including the air valve bridge and Rocker arm assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106194306B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107373A (en) * | 2019-04-23 | 2019-08-09 | 东风商用车有限公司 | A kind of the engine air raft of pontoons structure and its control method of lift range variable |
| CN112963221B (en) * | 2021-03-15 | 2022-01-14 | 潍柴动力股份有限公司 | Braking rocker arm and engine |
| CN114109551B (en) * | 2022-01-25 | 2022-04-26 | 江苏卓联精密机械有限公司 | Special driving cam combined type valve driving device for hydraulic clearance self-adjustment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624926A (en) * | 2008-07-11 | 2010-01-13 | 德国曼商用车辆股份公司 | Combustion engine with a motor brake device |
| CN101769185A (en) * | 2009-01-05 | 2010-07-07 | 杨柳 | Integrated engine braking device with mechanical chaining and method for changing movement of engine air valve |
| WO2016011113A1 (en) * | 2014-07-15 | 2016-01-21 | Jacobs Vehicle Systems, Inc. | System comprising an accumulator upstream of a lost motion component in a valve bridge |
| CN105351026A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Engine exhaust brake system |
-
2016
- 2016-08-23 CN CN201610706120.2A patent/CN106194306B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624926A (en) * | 2008-07-11 | 2010-01-13 | 德国曼商用车辆股份公司 | Combustion engine with a motor brake device |
| CN101769185A (en) * | 2009-01-05 | 2010-07-07 | 杨柳 | Integrated engine braking device with mechanical chaining and method for changing movement of engine air valve |
| WO2016011113A1 (en) * | 2014-07-15 | 2016-01-21 | Jacobs Vehicle Systems, Inc. | System comprising an accumulator upstream of a lost motion component in a valve bridge |
| CN105351026A (en) * | 2015-11-23 | 2016-02-24 | 潍柴动力股份有限公司 | Engine exhaust brake system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106194306A (en) | 2016-12-07 |
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