CN105422203B - Valvetrain system with hydraulic lash adjuster and exhaust brake - Google Patents
Valvetrain system with hydraulic lash adjuster and exhaust brake Download PDFInfo
- Publication number
- CN105422203B CN105422203B CN201510513920.8A CN201510513920A CN105422203B CN 105422203 B CN105422203 B CN 105422203B CN 201510513920 A CN201510513920 A CN 201510513920A CN 105422203 B CN105422203 B CN 105422203B
- Authority
- CN
- China
- Prior art keywords
- valve
- rocker arm
- rocker
- component
- exhaust valve
- 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.)
- Active
Links
Abstract
The present invention relates to a kind of valvetrain system with hydraulic lash adjuster and exhaust brake.Operable exhaust valve rocker component includes rocker arm shaft, rocker arm, valve cross arm, bleeder valve, hydraulic lash adjuster and elastic capsule in engine braking modes.Rocker arm shaft defines pressurization oil supply tube.Rocker arm receives rocker arm shaft and is configured about rocker arm shaft rotation.Rocker arm has oil supply gallery defined therein.Valve cross arm engages first row valve and second row valve.Bleeder valve has the piston that can be moved between retracted position and extended position.Hydraulic lash adjuster component is arranged on rocker arm and the first plunger body including that can move between the first position and the second position.In first position, the first plunger body rigidly extends for collaboratively engaging with valve cross arm.
Description
Cross reference to related applications
This application claims the U.S. Patent application No.62/017,321 submitted on June 26th, 2014 and in July, 2014
The priority of the U.S. Patent application No.62/024,633 submitted for 15th.The content of above-mentioned patent application is by reference simultaneously
Enter herein.
Technical field
Present invention relates in general to a kind of in valve mechanism (valve train) component with exhaust brake
Rocker arm assembly and relate more specifically to it is a kind of have be integrated with hydraulic capsule (hydraulic bag, hydraulic capsule) and liquid
Press the rocker arm assembly of the rocker arm of clearance adjuster.
Background technique
Engine braking can be used for hindering in-engine power finally vehicle to be made to slow down.With engine brake one
It rises in the typical valve train assembly used, exhaust valve is by engaging the exhaust valve by valve cross arm (valve bridge)
Rocker actuation.Rocker arm swung in response to the cam on the camshaft of rotation and under be pressed on valve cross arm, the valve
It is pressed under transverse arm itself on exhaust valve to open it.
A kind of form of engine braking includes exhaust brake.Exhaust brake can be by heavy or medium duty diesel machine
The auxiliary brake being used as in addition to wheel brake on the vehicle (such as truck) of the relatively large-scale of power is provided.Exhaust system
Dynamic device generally includes to optionally extend into the piston of total travel.In total travel, piston can be in entire cycle of engine
Exhaust valve is maintained to open fixed amount.Therefore, it can produce mechanical clearance in valve mechanism.In many cases, this gap
It may not be compatible with general hydraulic lash adjuster (HLA).Valve train assembly can also be arranged in hydraulic lash adjuster
In to remove any gap or gap that are formed between each component in valve train assembly.Once exhaust brake deactivates,
Mechanical clearance can permit the unfavorable ground pump liter of HLA, prevent exhaust valve closing.When exhaust valve do not take one's seat/it is in place when, valve will be in gas
The combustion pressure of valve mechanism is transmitted under the adverse effect of door mechanism part.In extreme circumstances, the air in cylinder will be hindered
Compression pressure appropriate needed for only reaching burning.
Background technique description presented herein is typically to showing the contents of the present invention.Both ambiguously or not hidden
Recognize to work made by the present inventor described in background technology part containing ground and may be gone back when submitting application
The various aspects that cannot function as the specification of the prior art are for the prior art of the invention.
Summary of the invention
The exhaust valve rocker component that one kind can operate in engine braking (EB) mode includes rocker arm shaft, rocker arm, gas
Door transverse arm, exhaust brake, hydraulic lash adjuster and elastic capsule.Rocker arm shaft defines pressurization oil supply tube.Rocker arm connects
Receive rocker arm shaft and be configured about rocker arm shaft rotation.Rocker arm has oil supply gallery defined therein.Valve cross arm engagement the
One exhaust valve and second row valve.Exhaust brake has the hydraulic piston that can be moved between retracted position and extended position.
Hydraulic lash adjuster component is arranged on rocker arm and the first column including that can move between the first position and the second position
Cock body.In first position, the first plunger body rigidly extends for collaboratively engaging with valve cross arm.Elastic capsule is arranged in
Valve cross arm is biased towards in rocker arm and by hydraulic lash adjuster.
According to other feature, hydraulic lash adjuster component is at least partly received by the hole being limited on rocker arm.Elasticity
Capsule is at least partly received by the hole being limited on rocker arm.Hydraulic lash adjuster component further includes at least partly by first
The second plunger body that plunger body is received.Second plunger body defines valve seat.
In other feature, hydraulic lash adjuster includes the non-return ball component between the first and second plunger bodies.
Non-return ball component includes the first biasing member, the second biasing member, retainer (cage) and check ball.The liquid of exhaust brake
Pressure piston is configured to extend to the total travel for keeping first row valve to open preset space length.In one example, preset space length is 2
Millimeter.Elastic capsule includes providing the idle running spring of the first power.Hydraulic lash adjuster component provides the second power.First power is greater than
Second power.First plunger body, which has, defines the first closed end of the first plug being received in the first socket, and described first inserts
Mouth acts on valve cross arm.Elastic capsule provides the stroke for being equal to the half of correspondence course of hydraulic piston.
Detailed description of the invention
The present invention will be more fully understood by detailed description and accompanying drawings, in which:
Fig. 1 is using for exhaust brake and being integrated with hydraulic capsule and liquid for an example constructions according to the present invention
Press the partial side view of the exhaust valve rocker component of clearance adjuster；
Fig. 2 is the legend for listing the variable used in entire drawing and description；
Fig. 3 is to show the table of driving mode, engine braking modes and transient mode, and each mode provides idle running
With dry gap width；
Fig. 4 A-4C shows the valve of driving mode for being confirmed in Fig. 3, engine braking modes and transient mode
Lifting curve figure；
Fig. 5 show the driving mode for Fig. 3, engine braking modes and transient mode engine braking valve and with
The curve graph of dynamic valve；
Fig. 6 shows the exhaust brake for keeping exhaust valve to open during entire four-stroke engine circulation；
Fig. 7 is using for exhaust brake and being integrated with hydraulic capsule and liquid for another example constructions according to the present invention
Press the partial side view of the exhaust valve rocker component of clearance adjuster；
Fig. 8 shows the functional principal of each exemplary exhaust brake according to the present invention；And
Fig. 9 shows the key point of exhaust brake.
Specific embodiment
With reference first to Fig. 1, the part valve train assembly of an example constructions according to the present invention is shown and totally
On indicated by appended drawing reference 10.Part valve train assembly 10 uses engine braking.Part valve train assembly 10 can wrap
Include a series of rocker arm assembly 20 with a series of inlet valve rocker components (not specifically illustrated) and exhaust valve rocker components 30.It shakes
Arm axle 34 is received by shearer ranging arm is (not specifically illustrated).As by from understanding in following discussion, rocker arm shaft 34 and rocker arm assembly 20
And it more specifically cooperates with exhaust valve rocker component 30 so that oil is transmitted to exhaust valve rocker component during engine braking
30。
Now referring generally to Fig. 1-5, exhaust valve rocker component 30 can generally include Rocker arm 40, valve cross arm 42, elastic cabin
Box 44 and hydraulic lash adjuster (HLA) component 46.The engagement of valve cross arm 42 is associated with the cylinder (not shown) of engine
The first and second exhaust valves 50 and 52.The lifting curve of mandril (not specifically illustrated) based on camshaft (not shown) upwards and to
Lower movement.Moving upwards for mandril can push the arm fixed to Rocker arm 40 and then make Rocker arm 40 around 34 up time of rocker arm shaft
Needle rotation.Rocker arm shaft 34 can limit pressurization oil supply tube 54.Rocker arm 40, which can limit, to be configured to oil from rocker arm shaft 34
Pressurization oil supply tube 54 is transferred to the rocker arm pipeline 56 of HLA component 46.
HLA component 46 may include the plunger assembly 60 comprising the first plunger body 62 and the second plunger body 64.Second plunger
Body 64 can be received partly by the first plunger body 62.Plunger assembly 60 is received by the first hole 66 being limited in Rocker arm 40.The
One plunger body 62, which can have, defines the first closed end of the first plug 70 being received in the first socket 72, and described first inserts
Mouth acts on valve cross arm 42.Second plunger body 64, which has, defines the opening of valve seat 76.Non-return ball component 80 can be arranged
Between the first and second plunger bodies 62 and 64.Non-return ball component 80 may include the first biasing member, retainer, the second bias
Component and check ball.
Exhaust brake 100 may include hydraulic piston 102.Hydraulic piston 102 is configured in extended position and retracts position
It is moved between setting.When needing braking function, hydraulic piston 102 extends to stroke XB.In stroke XB, valve 50 is mobile to open phase
Same spacing.In this case, the exhaust valve rocker component 30 for being configured without elastic capsule 44 will cause HLA's 46
Pump rises, to prevent valve 50 from closing after engine braking deactivates.
The Rocker arm 40 of exhaust valve rocker component 30 is integrated with elastic capsule 44, provides the one of the stroke for being equal to piston 102
The stroke L of half limitationM.As shown in Fig. 2, LM=1/2XB.The opening slope of valve lift curve is identical with slope extension is closed
Amount LM.In normal working conditions, system always runs idle running stroke LM.Maximum valve lift by act on it is laterostigmatal most
Big cam lift and reduction amount LMIt obtains.
When enabling exhaust brake 100, hydraulic piston 102 stretches out, so that exhaust valve 50 is kept to open spacing XB.In gas
1/2X is produced in the contact portion of door transverse arm 42 and Rocker arm 40BMechanical clearance.HLA 46 will extend 1/2XB, finally will be between machinery
Gap is decreased to 0.
When no longer needing exhaust brake 100, hydraulic piston 102 will be pushed back and valve 50 will close.Elastic cabin
The power that the power Fs ratio of spring 120 in box 44 (acts on valve 50) valve spring is much smaller, and elastic capsule 44 will be forced to
It shrinks completely so that LMIt is moved to zero, that is, HLA46 extends 1/2X nowBAdditional travel.In this state, in engine braking
The first valve stroke under driving mode after deactivating will be applied to laterostigmatal entire cam lift, i.e., present LM=0.Bullet
The idle running spring 120 of property capsule 44 is designed as always generating the power Fs higher than the producible power of HLA 46.For this purpose, in elastic capsule
When 44 complete contraction, when cam is on basic circle, apply the power Fs that HLA 46 can be pushed to be allowed to shrink on HLA 46.The shape
State will occur in particular cycle number after engine braking deactivates, until elastic capsule 44 extends fully into its 1/2XB's
Range and HLA 46 will shrink identical amount to reach its normally dry interstitial site.
In some cases, the exhaust lift after engine braking just deactivates may be than following for specific engines
Optimal lift wants high and long for ring number.Therefore engine performance will be affected.However the state can be and can be made
User receive, therefore system disclosed herein can to avoid transmit it is any it is uncontrolled be loaded to in engine braking
Incomplete valve-closing after deactivating is relevant and relevant to the extension of HLA 46 valve mechanism.
Referring now to Fig. 6, it is shown according to an exemplary exhaust brake configuration and with the total body surface of appended drawing reference 200
Show.Exhaust brake configuration 200 includes extending to total travel so that keeping exhaust valve in entire four-stroke engine circulation
The hydraulic piston 202 of the constant spacing (such as 2mm) of an opening very little in 204,206.Due to exhaust brake configuration 200
Only exhaust valve 204,206 is kept to open fixed spacing, can be designed so that it does not place any load in camshaft
And on most of overhead component.The configuration is particularly suitable for more small-sized diesel engine.
Referring now to Fig. 7, the portion discharge door rocking arm set used for another exemplary exhaust brake according to the present invention
Part is shown and entirety by reference number 230 indicates.Unless other description, exhaust valve rocker component 230 can be constructed
At similar with exhaust valve rocker component 30 as described above.Exhaust valve rocker component 230 generally may include rocker arm 240, gas
Door transverse arm (being not specifically shown), idle running capsule 244 and hydraulic lash adjuster (HLA) component 246.Rocker arm 240 can limit
Surely it is configured to for oil to be transferred to the rocker arm pipeline 256 of HLA component 246 from pressurization oil supply tube (see the appended drawing reference 54 of Fig. 1).
HLA component 246 may include the plunger assembly 260 comprising the first plunger body 262 and the second plunger body 264.Second
Plunger body 264 can be received partly by the first plunger body 262.Plunger assembly 260 is by the first hole for being limited in rocker arm 240
266 receive.First plunger body 262, which can have, defines the first closing of the first plug 270 being received in the first socket 272
End, first socket 272 act on valve cross arm.Second plunger body 264, which has, defines the opening of valve seat 276.Non-return
Ball component 280 can be arranged between the first and second plunger bodies 262 and 264.Non-return ball component 280 may include the first bias
Component 282, retainer 284, the second biasing member 286 and check ball 290.
In one example, idle running capsule 244 can have the head office of the stroke of the exhaust brake piston of half
Journey (such as see Fig. 6 202, Fig. 1 102).Idle running capsule 244 may include biasing member 258.Biasing member 258 can have
There is the spring force bigger than the maximum axial force of HLA component 246.As being explained further, the maximum axial force of HLA component 246 can
To be that the power of the second biasing member 286 adds the summation for the maximum engine oil pressure being applied on the first plunger body 262.In one kind
In configuration, cam contour can compensate the idle running stroke of 1mm by the valve inclined-plane of extension.
Fig. 8 shows the working principle of exhaust brake.In driving mode 300A (position 1), at basic circle, HLA group
Part 246 is in nominal position.Idle running capsule 244 is fully extended.In driving mode 300B (position 2), during valve event,
HLA component 246 is in nominal position and idle running capsule 244 is fully compressed.In engine braking modes 300C (position 3),
The half of the extension brake piston of HLA component 246.Idle running capsule 244 is compressed under valve event and is prolonged on basic circle
It stretches.In from engine braking modes to the transient mode 300D of driving mode (position 4 to position 5), multiple movements are generated.?
After engine brake is just cut off, HLA component 246 extends the half of brake piston.Idle running capsule 244 is fully compressed.
Because maximum lift will be higher in point no idle running.During transient state, the idle running by one circulation then one cyclically to
Lower promotion HLA.Therefore idle running capsule 244 will extend upwardly to its maximum extension amount.Therefore maximum lift will be reduced and idle running row
Journey will increase.After transient state, original state will be repeated.Idle running capsule 244 will remain at its maximum extension.HLA component 246
It will remain in its nominal position.
Fig. 9 shows the key point of exhaust brake.Idle running capsule 244 can absorb during engine braking modes
The pump liter of HLA component 246.When engine braking is cut off, it is nominal that HLA component 246 can be pushed back into it by idle running spring 258
Position.Idle running capsule 244 will ensure that correct closing of the exhaust valve during driving mode.It can cause to avoid due to combustion pressure
The additional load being applied on valve mechanism.It under control can be using any additional back pressure peak value to avoid uncontrolled
HLA pump rise.
The explanation to previous embodiment is provided for the purpose for showing and describing.This is not intended to exhaustion or limitation originally
Invention.The individual elements or features of specific embodiment are generally not limited to this particular embodiment, but can be interchanged and can
In embodiment for selecting (if applicable), even if not being specifically shown or described.The elements or features
It can also change in a number of different manners.These changes are not considered as deviating from the present invention, and all these changes are all covered
Within the scope of the invention.
Claims (11)
1. a kind of exhaust valve rocker component that can be operated in engine braking modes, the exhaust valve rocker component include:
Limit the rocker arm shaft of pressurization oil supply tube；
It receives rocker arm shaft and is configured about the rocker arm of rocker arm shaft rotation, the rocker arm is logical with fuel feeding defined therein
Road；
Engage the valve cross arm of first row valve and second row valve；
Exhaust brake with the hydraulic piston that can be moved between retracted position and extended position；
The hydraulic lash adjuster component being arranged on rocker arm, the hydraulic lash adjuster component have can in first position and
The first plunger body moved between the second position, wherein in first position, the first plunger body rigidly extends to be used for and valve
Transverse arm collaboratively engages；And
It is arranged in elastic capsule in rocker arm, that hydraulic lash adjuster is biased towards to valve cross arm.
2. exhaust valve rocker component according to claim 1, wherein hydraulic lash adjuster component is at least partly by limiting
It receives in the hole being scheduled on rocker arm.
3. exhaust valve rocker component according to claim 1, wherein elastic capsule is at least partly by being limited on rocker arm
Hole receive.
4. exhaust valve rocker component according to claim 1, wherein hydraulic lash adjuster component further includes at least partly
The second plunger body that ground is received by the first plunger body, the second plunger body define valve seat.
5. exhaust valve rocker component according to claim 4, wherein hydraulic lash adjuster includes being located at first and second
Non-return ball component between plunger body.
6. exhaust valve rocker component according to claim 5, wherein non-return ball component includes the first biasing member, second
Biasing member, retainer and check ball.
7. exhaust valve rocker component according to claim 1, wherein the hydraulic piston of exhaust brake is configured to extend to
First row valve is kept to open the total travel of preset space length.
8. exhaust valve rocker component according to claim 7, wherein the preset space length is 2 millimeters.
9. exhaust valve rocker component according to claim 1, wherein elastic capsule includes providing the idle running bullet of the first power
Spring, and hydraulic lash adjuster component provides the second power, wherein the first power is greater than the second power.
10. exhaust valve rocker component according to claim 1, wherein the first plunger body, which has, to be defined and be received in first
First closed end of the first plug in socket, first socket act on valve cross arm.
11. exhaust valve rocker component according to claim 1, wherein elastic capsule provides the correspondence for being equal to hydraulic piston
The stroke of the half of stroke.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201462017321P | 2014-06-26 | 2014-06-26 | |
| US62/017321 | 2014-06-26 | ||
| US201462024633P | 2014-07-15 | 2014-07-15 | |
| US62/024633 | 2014-07-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422203A CN105422203A (en) | 2016-03-23 |
| CN105422203B true CN105422203B (en) | 2019-05-14 |
Family
ID=55500691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510513920.8A Active CN105422203B (en) | 2014-06-26 | 2015-06-26 | Valvetrain system with hydraulic lash adjuster and exhaust brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105422203B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422203B (en) * | 2014-06-26 | 2019-05-14 | 伊顿(意大利)有限公司 | Valvetrain system with hydraulic lash adjuster and exhaust brake |
| CN109154216B (en) * | 2016-04-07 | 2021-08-17 | 伊顿智能动力有限公司 | Rocker arm assembly |
| US11286818B2 (en) * | 2016-05-10 | 2022-03-29 | Eaton Intelligent Power Limited | Modular rocker arm |
| US10132206B1 (en) * | 2017-05-19 | 2018-11-20 | Caterpillar Inc. | Common rocker arm for hydraulic lash adjuster and non-hydraulic lash adjuster |
| US11549404B2 (en) | 2017-08-24 | 2023-01-10 | Eaton Intelligent Power Limited | Ball engine decompression mechanism |
| CN111033003B (en) * | 2017-08-24 | 2022-04-05 | 伊顿智能动力有限公司 | Spherical engine brake mechanism |
| CN112065524B (en) * | 2020-09-11 | 2021-09-28 | 潍柴动力股份有限公司 | Rocker arm assembly and engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1568850A1 (en) * | 2004-02-25 | 2005-08-31 | OTICS Corporation | Hydraulic lash adjuster |
| JP2008025394A (en) * | 2006-07-19 | 2008-02-07 | Toyota Motor Corp | Lash adjuster of internal combustion engine |
| EP2067943A1 (en) * | 2007-12-07 | 2009-06-10 | Otics Corporation | Valve gear and rocker arm unit |
| CN102037219A (en) * | 2008-05-21 | 2011-04-27 | 卡特彼勒公司 | A valve bridge having a centrally positioned hydraulic lash adjuster |
| CN105422203A (en) * | 2014-06-26 | 2016-03-23 | 伊顿(意大利)有限公司 | Valve mechanism system with hydraulic lash adjuster and exhaust brake |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004019282A1 (en) * | 2004-04-21 | 2005-12-15 | Ina-Schaeffler Kg | Valve gear with hydraulic backlash compensation |
-
2015
- 2015-06-26 CN CN201510513920.8A patent/CN105422203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1568850A1 (en) * | 2004-02-25 | 2005-08-31 | OTICS Corporation | Hydraulic lash adjuster |
| JP2008025394A (en) * | 2006-07-19 | 2008-02-07 | Toyota Motor Corp | Lash adjuster of internal combustion engine |
| EP2067943A1 (en) * | 2007-12-07 | 2009-06-10 | Otics Corporation | Valve gear and rocker arm unit |
| CN102037219A (en) * | 2008-05-21 | 2011-04-27 | 卡特彼勒公司 | A valve bridge having a centrally positioned hydraulic lash adjuster |
| CN105422203A (en) * | 2014-06-26 | 2016-03-23 | 伊顿(意大利)有限公司 | Valve mechanism system with hydraulic lash adjuster and exhaust brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105422203A (en) | 2016-03-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105422203B (en) | Valvetrain system with hydraulic lash adjuster and exhaust brake | |
| US10858963B2 (en) | Rocker arm assembly for engine braking | |
| CN106133286B (en) | For the rocker arm assembly of engine braking | |
| KR102356897B1 (en) | Lash Adjustment in Lost Motion Engine System | |
| EP2213849A1 (en) | Rocker arm retention | |
| CN106536878B (en) | Heavy valve actuating mechanism with decompression type engine braking function | |
| US20210131318A1 (en) | Balanced bridge bleeder brake with hla | |
| CN111655981A (en) | Engine brake castellated structure mechanism | |
| CN107771242A (en) | Valve actuating mechanism for the diesel engine with engine pressure m | |
| KR101683492B1 (en) | Cylinder deactivation engine | |
| CN102159800B (en) | Engine braking device for an internal combustion engine | |
| US11598228B2 (en) | Rocker arm assembly with valve bridge | |
| US10690024B2 (en) | Rocker arm assembly for engine braking | |
| CN107636267A (en) | Rocking arm with the oil drain valve as accumulator | |
| CN102840002A (en) | Hydraulic lash adjuster including band of radial recirculation openings | |
| CN103912336A (en) | Single valve opened engine auxiliary valve actuator | |
| EP2868876B1 (en) | Integrated engine brake | |
| CN103429855B (en) | There is the valve device of additional travel in cam base circle | |
| US10619528B2 (en) | Compression brake for internal combustion engine | |
| US8677964B2 (en) | Variable valve lift apparatus | |
| CN112639255B (en) | Balance arm bleeder brake with HLA | |
| US11401839B2 (en) | Rocker based bleeder engine brake | |
| US20230235686A1 (en) | Rocker arm assembly with valve bridge | |
| CN104395568A (en) | Hydraulic lash adjuster | |
| KR101646133B1 (en) | Cylinder deactivation engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | 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 |