CN201255016Y - Engine braking device - Google Patents
Engine braking device Download PDFInfo
- Publication number
- CN201255016Y CN201255016Y CNU2008200724287U CN200820072428U CN201255016Y CN 201255016 Y CN201255016 Y CN 201255016Y CN U2008200724287 U CNU2008200724287 U CN U2008200724287U CN 200820072428 U CN200820072428 U CN 200820072428U CN 201255016 Y CN201255016 Y CN 201255016Y
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- Prior art keywords
- exhaust valve
- exhaust
- rocker arm
- cavity
- chamber
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- Expired - Lifetime
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- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model relates to an engine braking device. The utility model is characterized in that an exhaust cam of an engine is additionally provided with a braking cam; an exhaust rocker integrates two devices which comprise a gap compensation device and an engine braking switch device; wherein, the gap compensation device mainly consists of an adjustment bolt - exhaust valve rocker, an exhaust valve elephant-foot assembly, a snap ring and a return spring; a cavity is arranged under the adjustment bolt hole - exhaust valve rocker at the front end of the exhaust valve rocker; the exhaust valve elephant-foot assembly is fixed in the cavity through the snap ring; the return spring is arranged on the exhaust valve elephant-foot assembly; a gap is left at the bottom plane of the inner cavity formed by the adjustment bolt - exhaust valve rocker and the elephant-foot assembly; the engine braking switch device consists of a braking plunger, a one-way valve assembly and a control valve; the middle part of the exhaust rocker is respectively provided with an upper cavity and a lower cavity; the control valve is arranged in the upper cavity; the braking plunger is arranged in the lower cavity; and the upper cavity and the lower cavity are connected with each other through the one-way valve. The utility model has the advantages of simple structure, good rigidity, low cost and the like, and simultaneously has unique advantages in the realization and the own working performance.
Description
Technical field
The utility model belongs to the technical field of engine braking, particularly a kind of engine braking apparatus.
Background technique
At present, the engine braking of using on motor mainly is divided into lose heart two kinds of braking and compression brakes: the brake structure that loses heart is simple, and it is easy to realize, cost is low; Compression brake structure relative complex, cost is higher, but the braking work that is obtained is bigger.
Summary of the invention
The utility model purpose provides a kind of engine braking apparatus.
The technical solution of the utility model is achieved in that
Engine braking apparatus, it is characterized by: on the exhaust cam of motor, increase a braking cam, integrated two kinds of devices in the exhaust rocker arm, a kind of is the compensate for clearance device, mainly by adjusting bolt-exhaust valve rocker arm, exhaust valve resembles the pin assembly, snap ring, return spring is formed, a chamber is arranged below the adjustment bolt hole-exhaust valve rocker arm of exhaust valve rocker arm front end, exhaust valve resembles the pin assembly and is fixed in the chamber by snap ring, and return spring is installed, make to resemble pin and when free state, in the chamber, contact with snap ring bottom, adjust bolt-exhaust valve rocker arm and resemble pin assembly inner chamber bottom plane and reserve certain clearance; Another kind is the engine braking switch gear, form by spool, one-way valve assembly and control valve, the exhaust valve rocker arm middle part respectively has a chamber up and down, link to each other in the middle of two chambeies, what installed the epicoele the inside is control valve, control valve is in bottom under the spring force effect of gravity and return spring at ordinary times, and cavity of resorption is installed with spool, is connected by one-way valve between the upper and lower cavity.
The utlity model has simple in structure, good rigidity, characteristics such as cost is low, realization property and the service behaviour aspect of himself all possess special advantages simultaneously.
Description of drawings
Fig. 1 is that A-A of the present utility model is to cross-sectional view;
Fig. 2 is a structural representation of the present utility model.
Specific embodiments
Describe specific embodiments of the present utility model in detail below in conjunction with accompanying drawing.
Engine braking apparatus, it is characterized by: on the exhaust cam 1 of motor, increase braking cam 2, integrated two kinds of devices in the exhaust rocker arm 11, a kind of is the compensate for clearance device, mainly by adjusting bolt-exhaust valve rocker arm 7, exhaust valve resembles pin assembly 10, snap ring 9, return spring 8 is formed, below the hole of the adjustment bolt-exhaust valve rocker arm 7 of exhaust valve rocker arm 11 front ends, a chamber is arranged, exhaust valve resembles pin assembly 10 and is fixed in the chamber by snap ring 9, and return spring 8 is installed, make to resemble pin and when free state, in the chamber, contact with snap ring 9 bottom, adjust bolt-exhaust valve rocker arm 7 and exhaust valve and resemble pin assembly 10 inner chamber bottom planes and reserve certain clearance; Another kind is the engine braking switch gear, form by spool 4, one-way valve assembly 6 and control valve 5, exhaust valve rocker arm 11 middle parts respectively have a chamber up and down, link to each other in the middle of two chambeies, what installed the epicoele the inside is control valve 5, control valve 5 is in bottom under the spring force effect of gravity and return spring at ordinary times, and cavity of resorption is installed with spool 4, is connected by one-way valve 6 between the upper and lower cavity.
Embodiment:
A brake cam 2 of using for engine braking is specially arranged on the exhaust cam 1 of camshaft, when needs use engine braking, oil circuit control by solenoid valve 12, this brake cam 2 can be opened an exhaust valve near piston top dead center, pressurized gas in the cylinder are emitted, realize engine braking; When motor did not need engine braking, the blank compensation apparatus that the lift that brake cam 2 is produced can be deflated in the rocking arm 11 compensated, and can not open exhaust valve.
Below the hole of the adjustment bolt-exhaust valve rocker arm 7 of exhaust rocker arm 11 front ends, a chamber is arranged, exhaust valve resembles pin assembly 10 and is fixed in the chamber by snap ring, exhaust valve resembles pin assembly 10 and can slide up and down in the chamber, return spring wherein is installed, makes exhaust valve resemble pin assembly 10 and when free state, in the chamber, contact with snap ring 9 bottom; Adjust bolt-exhaust valve rocker arm 7 and exhaust valve and resemble pin assembly 10 inner chamber bottom planes reservation certain clearance, beginning does not contact, exhaust valve rocker arm 11 is installed on the pitman arm shaft 3, after exhaust valve rocker arm 11 swings, exhaust valve resembles pin assembly 10 and upwards slides in exhaust valve rocker arm 11 chambeies earlier, after adjusting bolt-exhaust valve rocker arm 7 lower ends and the bottom plane that resembles the pin inner chamber contacts, exhaust valve resembles pin assembly 10 can be along with 2 exhaust valves of swing open of exhaust valve rocker arm 11; The gap width of this reservation equals just in time that normal emission valve clearance and brake cam can produce resemble the pin maximum lift and, that is to say, brake cam 2 is can not open 2 exhaust valves simultaneously forever, because the lift that it can produce has been compensated by the gap of this reservation, the effect of Here it is blank compensation apparatus.
Exhaust valve rocker arm 11 middle parts respectively have a chamber up and down, link to each other in the middle of two chambeies, and what installed the epicoele the inside is control valve 5, and control valve 5 is in bottom under the spring force effect of gravity and return spring at ordinary times, can open one-way valve 6; Cavity of resorption is installed with spool 4, and spool 4 can slide up and down in cavity of resorption, and it opens an exhaust valve by the exhaust valve bridge jacking block in the time of braking; Connect by one-way valve 6 between the upper and lower cavity.When not using engine braking, one-way valve 6 is in open mode all the time, and cavity of resorption and epicoele are communicated with, and during brake cam 2 jack-up exhaust valve rocker arms 11, the lift that brake cam produces is eaten up in spool 4 slip that just can make progress in cavity of resorption; When using engine braking, the solenoid valve 12 of control machine oil is opened, machine oil enters cavity of resorption in the bottom of epicoele by one-way valve 6, cavity of resorption is full of the bottom surface that the pressure of back machine oil acts on control valve 5 will overcome return spring and gravity, control valve 5 upwards slides in epicoele and one-way valve 6 is thrown off, one-way valve 6 is closed, this moment, cavity of resorption was full of machine oil, form the chamber of a sealing, spool 4 just can not slide up and down, when brake cam 2 was opened exhaust valve rocker arm 11, spool 4 will be opened an exhaust valve by the air valve bridge jacking block; Close after the solenoid valve 12, engine oil pressure is laid down, and control valve 5 will slide into the bottom of epicoele under the effect of return spring and gravity, open one-way valve 6, and the oil pressure of cavity of resorption is also laid down, and spool 4 can slide by easy on and off again.Whole process has just realized the effect of engine braking switch.
This kind engine braking adopts 2 solenoid valves, and each controls 3 cylinders, can make engine braking be divided into 2 grades like this, brakes simultaneously according to braking of actual conditions 3 cylinders or 6 cylinders.
Claims (1)
1, engine braking apparatus, it is characterized by: going up at the exhaust cam (1) of motor increases braking cam (2), integrated two kinds of devices in the exhaust valve rocker arm (11), a kind of is the compensate for clearance device, mainly by adjusting bolt-exhaust valve rocker arm (7), exhaust valve resembles pin assembly (10), snap ring (9), return spring (8) is formed, below the hole of the adjustment bolt-exhaust valve rocker arm (7) of exhaust valve rocker arm (11) front end, a chamber is arranged, exhaust valve resembles pin assembly (10) and is fixed in the chamber by snap ring (9), and return spring (8) is installed, make to resemble pin and when free state, in the chamber, contact with snap ring (9) bottom, adjust bolt-exhaust valve rocker arm (7) and exhaust valve and resemble pin assembly (10) inner chamber bottom plane reservation certain clearance; Another kind is the engine braking switch gear, form by spool (4), one-way valve assembly (6) and control valve (5), exhaust valve rocker arm (11) middle part respectively has a chamber up and down, link to each other in the middle of two chambeies, what installed the epicoele the inside is control valve (5), control valve (5) is in bottom under the spring force effect of gravity and return spring at ordinary times, and cavity of resorption is installed with spool (4), is connected by one-way valve (6) between the upper and lower cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724287U CN201255016Y (en) | 2008-09-12 | 2008-09-12 | Engine braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724287U CN201255016Y (en) | 2008-09-12 | 2008-09-12 | Engine braking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201255016Y true CN201255016Y (en) | 2009-06-10 |
Family
ID=40738332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200724287U Expired - Lifetime CN201255016Y (en) | 2008-09-12 | 2008-09-12 | Engine braking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201255016Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840005A (en) * | 2011-06-24 | 2012-12-26 | 上海尤顺汽车部件有限公司 | Fixed-chain type composite rocker arm braking device |
| US9016249B2 (en) | 2012-09-24 | 2015-04-28 | Jacobs Vehicle Systems, Inc. | Integrated lost motion rocker brake with automatic reset |
| CN109488411A (en) * | 2017-09-12 | 2019-03-19 | 现代自动车株式会社 | Engine braking apparatus |
| US10526926B2 (en) | 2015-05-18 | 2020-01-07 | Eaton Srl | Rocker arm having oil release valve that operates as an accumulator |
-
2008
- 2008-09-12 CN CNU2008200724287U patent/CN201255016Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840005A (en) * | 2011-06-24 | 2012-12-26 | 上海尤顺汽车部件有限公司 | Fixed-chain type composite rocker arm braking device |
| WO2012174697A1 (en) * | 2011-06-24 | 2012-12-27 | 上海尤顺汽车部件有限公司 | Fixed chain type composite rocker arm brake device |
| CN102840005B (en) * | 2011-06-24 | 2015-11-04 | 上海尤顺汽车部件有限公司 | A kind of solid chain type composite rocker arm brake device |
| US9016249B2 (en) | 2012-09-24 | 2015-04-28 | Jacobs Vehicle Systems, Inc. | Integrated lost motion rocker brake with automatic reset |
| US10526926B2 (en) | 2015-05-18 | 2020-01-07 | Eaton Srl | Rocker arm having oil release valve that operates as an accumulator |
| CN109488411A (en) * | 2017-09-12 | 2019-03-19 | 现代自动车株式会社 | Engine braking apparatus |
| CN109488411B (en) * | 2017-09-12 | 2021-07-13 | 现代自动车株式会社 | Engine brake device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: CHINESE AUTO GROUP CO NO.1 Effective date: 20111114 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111114 Address after: 130011 No. 2259 Dongfeng Avenue, West New Economic and Technological Development Zone, Changchun Patentee after: China FAW Group Corporation Address before: 130011 Dongfeng Street, Jilin, Changchun, No. 2259 Patentee before: China FAW Group Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090610 |