CN109441587A - The integrated rocker arm-braking mechanism of medium duty engine - Google Patents
The integrated rocker arm-braking mechanism of medium duty engine Download PDFInfo
- Publication number
- CN109441587A CN109441587A CN201910001391.1A CN201910001391A CN109441587A CN 109441587 A CN109441587 A CN 109441587A CN 201910001391 A CN201910001391 A CN 201910001391A CN 109441587 A CN109441587 A CN 109441587A
- Authority
- CN
- China
- Prior art keywords
- exhaust
- braking
- valve
- rocker arm
- brake
- 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
- 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
-
- 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
- F01L1/181—Centre pivot rocking arms
Abstract
The invention discloses a kind of integrated rocker arm-braking mechanisms of medium duty engine, comprising: push rod, brake cam, tappet, exhaust brake rocker arm, valve cap, valve axle assemble, driving piston and braking exhaust valve.Brake cam is integrated on exhaust cam, and brake cam includes that compression braking boss and BGR brake boss；The upper end of tappet and the lower end of push rod connect, and the lower end of tappet is connect with exhaust cam；The connection of the upper end of exhaust brake rocker arm and push rod；Valve cap is connect with exhaust brake rocker arm；Valve axle assemble is fixedly connected with valve cap；Driving piston is integrated on exhaust brake rocker arm, and driving piston can move up and down, and drives piston to push valve cap and braking exhaust valve；And braking exhaust valve is fixedly connected with valve axle assemble.Whereby, the integrated rocker arm-braking mechanism of medium duty engine of the invention, simple and reasonable, braking power is high, and braking ability is reliable, and does not have to exhaust butterfly valve, no exhaust back pressure.
Description
Technical field
The present invention relates to engine arts, especially with regard to a kind of integrated rocker arm-braking mechanism of medium duty engine.
Background technique
According to national legislation GB7258-2017: car (to dedicated school bus be vehicle commander be greater than 8m) of the vehicle commander greater than 9m, gross weight
Lorry of the amount more than or equal to 12000kg and special Operation Van, total weight are greater than the Dangerous Goods Transport vehicle of 3500kg, should equip
Retarder or other complemental brake systems.
As discharge upgrading and client require more harshness to NVH, braking technology route includes: in industry middle cylinder at present
Deflation type+exhaust butterfly valve and compression-release type+exhaust butterfly valve, exhaust back pressure is high, and braking power is low, is unfavorable for fuel injector, distribution
The reliabilities such as mechanism, camshaft, valve retainer, and all it is unable to satisfy the upgrade requirement of state 6.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
It is simple and reasonable the purpose of the present invention is to provide a kind of integrated rocker arm-braking mechanism of medium duty engine,
Braking power is high, and braking ability is reliable, and does not have to exhaust butterfly valve, no exhaust back pressure.
To achieve the above object, the present invention provides a kind of integrated rocker arm-braking mechanisms of medium duty engine, comprising: pushes away
Bar, brake cam, tappet, exhaust brake rocker arm, valve cap, valve axle assemble, driving piston and braking exhaust valve.It brakes convex
Wheel is integrated on exhaust cam, and brake cam includes that compression braking boss and BGR brake boss；The upper end of tappet and push rod
Lower end connection, and the lower end of tappet is connect with exhaust cam；The connection of the upper end of exhaust brake rocker arm and push rod；Valve cap and exhaust
Brake rocker arm connection；Valve axle assemble is fixedly connected with valve cap；Driving piston is integrated on exhaust brake rocker arm, drives piston
It can move up and down, and drive piston to push valve cap and braking exhaust valve；And brake exhaust valve and valve axle assemble
It is fixedly connected；Wherein, when brake cam goes to BGR braking boss, and tappet is in the position of BGR braking boss, braking is shaken
Arm driving driving piston pushes valve cap and braking exhaust valve, to open braking exhaust valve；Wherein, when brake cam goes to pressure
Contraction moves boss, and tappet is in when compressing the position for braking boss, and brake rocker arm driving driving piston pushes valve cap and system
Dynamic exhaust valve, to realize compression release braking.
In a preferred embodiment, the integrated rocker arm-braking mechanism of medium duty engine further includes brake control valve, collection
At on exhaust brake rocker arm.
In a preferred embodiment, the integrated rocker arm-braking mechanism of medium duty engine further include as sufficient spring and as
Foot, as one end of sufficient spring is connect with exhaust brake rocker arm, as the other end of sufficient spring as foot by connecting with valve axle assemble.
Compared with prior art, the integrated rocker arm-braking mechanism of medium duty engine according to the present invention, it is simple and reasonable,
Braking power is high, and braking ability is reliable, and does not have to exhaust butterfly valve, no exhaust back pressure.
Detailed description of the invention
Fig. 1 is the front view structure signal of the integrated rocker arm-braking mechanism of medium duty engine according to an embodiment of the present invention
Figure.
Main appended drawing reference explanation:
1- exhaust cam, 2- compression braking boss, 3-BGR braking boss, 4- tappet, 5- push rod, 6- exhaust brake rocker arm,
7- valve cap, 8- valve axle assemble, 9- drive piston, and 10- brakes exhaust valve, and 11- is as sufficient spring.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, Fig. 1 is the master of the integrated rocker arm-braking mechanism of medium duty engine according to an embodiment of the present invention
Depending on structural schematic diagram.
A kind of integrated rocker arm-braking mechanism of medium duty engine according to the preferred embodiment of the present invention, comprising: push rod 5,
Brake cam, tappet 4, exhaust brake rocker arm 6, valve cap 7, valve axle assemble 8, driving piston 9 and braking exhaust valve 10.System
Moving cam is integrated on exhaust cam 1, and brake cam includes that compression braking boss 2 and BGR brake boss 3；The upper end of tappet 4
It is connect with the lower end of push rod 5, and the lower end of tappet 4 is connect with exhaust cam 1；The upper end of exhaust brake rocker arm 6 and push rod 5 connects
It connects；Valve cap 7 is connect with exhaust brake rocker arm 6；Valve axle assemble 8 is fixedly connected with valve cap 7；Drive 9 row of being integrated in of piston
On gas brake rocker arm 6, driving piston 9 can move up and down, and drive piston 9 to push valve cap 7 and braking exhaust valve 10；
And braking exhaust valve 10 is fixedly connected with valve axle assemble 8；Wherein, when brake cam goes to BGR braking boss 3, and tappet 4
When braking the position of boss 3 in BGR, brake rocker arm driving driving piston 9 pushes valve cap 7 and braking exhaust valve 10, thus
Open braking exhaust valve 10；Wherein, boss 2 is braked when brake cam goes to compression, and tappet 4 is in compression braking boss 2
When position, brake rocker arm driving driving piston 9 pushes valve cap 7 and braking exhaust valve 10, to realize compression release braking.
In a preferred embodiment, brake cam also has admission cam and exhaust cam；The collection of medium duty engine
Further include brake control valve at rocker arm-braking mechanism, is integrated on exhaust brake rocker arm 6；The integrated rocker arm-braking of medium duty engine
Mechanism further include as sufficient spring 11 and as foot, it is another as sufficient spring 11 as one end of sufficient spring 11 is connect with exhaust brake rocker arm 6
One end as foot by connecting with valve axle assemble 8, in driving mode or braking mode, as sufficient spring 11 may insure as the same gas of foot
Raft of pontoons component touch (is not flown off).
In practical applications, braking function is integrated in exhaust by the integrated rocker arm-braking mechanism of medium duty engine of the invention
(exhaust brake rocker arm 6), each cylinder oil inlet inlet valve rocker and exhaust valve rocker on door rocker arm, and it is each by the connection of oil circuit bracket
The brake circuit of a cylinder, brake cam is there are two boss is braked, and one is BGR braking boss 3, the other is compression braking boss
2, in the case where not filling exhaust butterfly valve, braking exhaust valve 10 is opened three times: BGR, compression and main exhaust stroke, so as to obtain
Better braking power is taken, GB7258 laws and regulations requirement is fully met, specifically: after brake control valve is powered, press machine oil stream
Enter brake and driving piston 9 is pushed to move up and down, driving piston 9 pushes valve cap 7, valve axle assemble 8 and braking exhaust valve
10, when tappet 4 is in basic circle in brake cam, driving piston 9 does not stretch out, when the BGR braking that tappet 4 is in brake cam is convex
When platform 3 (when brake cam go to BGR braking boss 3 when), exhaust brake rocker arm 6 by driving piston 9 push valve cap 7 and
Exhaust valve 10 is braked, to open braking exhaust valve 10；When brake cam goes to compression braking boss 2, exhaust brake rocker arm 6
Valve cap 7 and braking exhaust valve 10 are pushed by driving piston 9, to realize compression release braking.Brake control valve powers off shape
State, arrestment mechanism retract under the action of as sufficient spring 11, and braking does not work.
Compared with prior art, the integrated rocker arm-braking mechanism of medium duty engine according to the present invention, it is simple and reasonable,
Compact light-weight, braking power is high, and braking ability is reliable, and does not have to exhaust butterfly valve, and no exhaust back pressure is conducive to fuel injector and matches
The reliability of mechanism of qi structure reduces the abrasion of valve retainer and camshaft.
The aforementioned description to specific exemplary embodiment of the invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (3)
1. a kind of integrated rocker arm-braking mechanism of medium duty engine characterized by comprising
Push rod；
Brake cam is integrated on exhaust cam, and the brake cam includes that compression braking boss and BGR brake boss；
Tappet, the upper end of the tappet are connect with the lower end of the push rod, and the lower end of the tappet and the exhaust cam connect
It connects；
Exhaust brake rocker arm is connect with the upper end of the push rod；
Valve cap is connect with the exhaust brake rocker arm；
Valve axle assemble is fixedly connected with the valve cap；
Piston is driven, is integrated on the exhaust brake rocker arm, the driving piston can move up and down, and the driving piston
To push the valve cap and the braking exhaust valve；And
Exhaust valve is braked, is fixedly connected with the valve axle assemble；
Wherein, boss is braked when the brake cam goes to the BGR, and the tappet is in the position of BGR braking boss
When setting, the brake rocker arm drives the driving piston to push the valve cap and the braking exhaust valve, thus described in opening
Brake exhaust valve；
Wherein, boss is braked when the brake cam goes to the compression, and the tappet is in the compression braking boss
When position, the brake rocker arm drives the driving piston to push the valve cap and the braking exhaust valve, to realize pressure
Contracting release braking.
2. the integrated rocker arm-braking mechanism of medium duty engine as described in claim 1, which is characterized in that further include control for brake
Valve is integrated on the exhaust brake rocker arm.
3. the integrated rocker arm-braking mechanism of medium duty engine as described in claim 1, which is characterized in that further include as sufficient spring
And as foot, described one end as sufficient spring is connect with the exhaust brake rocker arm, and the other end as sufficient spring passes through described
It is connect as sufficient with the valve axle assemble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001391.1A CN109441587A (en) | 2019-01-02 | 2019-01-02 | The integrated rocker arm-braking mechanism of medium duty engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001391.1A CN109441587A (en) | 2019-01-02 | 2019-01-02 | The integrated rocker arm-braking mechanism of medium duty engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109441587A true CN109441587A (en) | 2019-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910001391.1A Pending CN109441587A (en) | 2019-01-02 | 2019-01-02 | The integrated rocker arm-braking mechanism of medium duty engine |
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| Country | Link |
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| CN (1) | CN109441587A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854325A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | A kind of two-stroke auxiliary brake mechanism |
| CN112963220A (en) * | 2021-02-08 | 2021-06-15 | 广西玉柴机器股份有限公司 | Brake valve of integrated rocker arm brake mechanism and method for adjusting brake clearance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003314A (en) * | 2015-07-21 | 2015-10-28 | 浙江康和机械科技有限公司 | Rocker arm integrating engine brake |
| CN106150589A (en) * | 2015-04-28 | 2016-11-23 | 上海尤顺汽车部件有限公司 | A kind of single valve compression-release valve bridge brake unit |
| CN106640258A (en) * | 2016-12-28 | 2017-05-10 | 潍柴动力股份有限公司 | Engine compression release type braking system and engine |
| CN108547675A (en) * | 2018-06-04 | 2018-09-18 | 广西玉柴机器股份有限公司 | The engine rocker of valve actuating mechanism impact can be reduced |
-
2019
- 2019-01-02 CN CN201910001391.1A patent/CN109441587A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150589A (en) * | 2015-04-28 | 2016-11-23 | 上海尤顺汽车部件有限公司 | A kind of single valve compression-release valve bridge brake unit |
| CN105003314A (en) * | 2015-07-21 | 2015-10-28 | 浙江康和机械科技有限公司 | Rocker arm integrating engine brake |
| CN106640258A (en) * | 2016-12-28 | 2017-05-10 | 潍柴动力股份有限公司 | Engine compression release type braking system and engine |
| CN108547675A (en) * | 2018-06-04 | 2018-09-18 | 广西玉柴机器股份有限公司 | The engine rocker of valve actuating mechanism impact can be reduced |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854325A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | A kind of two-stroke auxiliary brake mechanism |
| CN109854325B (en) * | 2019-03-27 | 2024-01-05 | 大连理工大学 | Two-stroke auxiliary braking mechanism |
| CN112963220A (en) * | 2021-02-08 | 2021-06-15 | 广西玉柴机器股份有限公司 | Brake valve of integrated rocker arm brake mechanism and method for adjusting brake clearance |
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| PB01 | Publication | ||
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Application publication date: 20190308 |