CN201057092Y - Small piston displacement thrust brake of exhaust valve braking air valve - Google Patents
Small piston displacement thrust brake of exhaust valve braking air valve Download PDFInfo
- Publication number
- CN201057092Y CN201057092Y CNU2007200231459U CN200720023145U CN201057092Y CN 201057092 Y CN201057092 Y CN 201057092Y CN U2007200231459 U CNU2007200231459 U CN U2007200231459U CN 200720023145 U CN200720023145 U CN 200720023145U CN 201057092 Y CN201057092 Y CN 201057092Y
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- CN
- China
- Prior art keywords
- small piston
- valve bridge
- cavity
- air valve
- positive stop
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- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a small piston displacement anti-thrust device for an exhaust valve braking valve bridge, which comprises a small piston cavity arranged in the valve bridge, the small piston arranged in the small piston cavity, a spring positioned at the top of the small piston, a downlink positive stop groove positioned at one side of the body of the small piston for restricting the small piston to walking downward and a position-restricted pin fixedly arranged on the valve bridge and being corresponding to the downlink positive stop groove. The upper end of the downlink positive stop groove is the lower positive stop face of the small piston moving downward; the small piston cavity of the valve bridge takes the shape of steps; the small piston is arranged in the big cavity taking the shape of steps; the interface of the upper end of the small piston and the step of the step-shaped cavity is the top dead surface of the small piston. Therefore, when the valve is pressed downward, the small piston bears the pressure and when the small piston stretches outward, the bottom dead surface is limited by the position-restricted pin, thereby ensuring the right position of the small piston when the small piston is pressed or on free stretching status, guaranteeing good effect of exhaust brake of the diesel engine and realizing the purpose of controlling speed at the same time.
Description
Technical field
The utility model relates to a kind of displacement thrust device of air exhaust valve brake air valve bridge small piston.
Background technique
Effect when the displacement meeting of air exhaust valve brake air valve bridge small piston influences the diesel exhaust gas braking is so require small piston stroke location accurately reliable.During general the design, the stroke of small piston is limited by the position limit pin in small piston one side fully, but all power can all be added on the position limit pin when pressing down owing to valve, again owing to the side of this position limit pin at small piston, can make the small piston unbalance stress, cause small piston to block easily or the wearing and tearing aggravation of position limit pin place.
The model utility content
Technical problem to be solved in the utility model provides a kind of small piston that makes at pressurized or can guarantee the air exhaust valve brake air valve bridge small piston displacement thrust device of the tram of small piston when freely stretching out state.
For solving the problems of the technologies described above, the technical solution of the utility model is: air exhaust valve brake air valve bridge small piston displacement thrust device, comprise air valve bridge, be arranged on the small piston chamber in the air valve bridge, described small piston is equipped with small piston in the chamber, the top of described small piston is equipped with spring, one side of described small piston body is provided with the descending restraining groove of the downward walking position of the described small piston of restriction, be installed with on the described air valve bridge and the corresponding position limit pin of described descending restraining groove, the upper end of described descending restraining groove is the lower limit plane that described small piston moves downward, the small piston chamber of described air valve bridge is step-like, and described small piston is positioned at the big chamber of step-like cavity, and the step surface of contact of the upper-end surface of described small piston and step-like cavity is that going up of described small piston ended face.
Owing to adopted technique scheme, air exhaust valve brake air valve bridge small piston displacement thrust device, comprise air valve bridge, be arranged on the small piston chamber in the air valve bridge, described small piston is equipped with small piston in the chamber, the top of described small piston is equipped with spring, one side of described small piston body is provided with the descending restraining groove of the downward walking position of the described small piston of restriction, be installed with on the described air valve bridge and the corresponding position limit pin of described descending restraining groove, the upper end of described descending restraining groove is the lower limit plane that described small piston moves downward, the small piston chamber of described air valve bridge is step-like, and described small piston is positioned at the big chamber of step-like cavity, and the step surface of contact of the upper-end surface of described small piston and step-like cavity is that going up of described small piston ended face; So only changing into, face is the upper-end surface of small piston, end down face by position limit pin spacing be descending restraining groove above, pressure when valve presses down is born responsibility by small piston and is subjected to, when small piston stretches out, it is spacing by position limit pin to end face down, this power only is the power of the spring of small piston top, less, even if block, bigger power also can unfreezing when valve pressed down, and made small piston at pressurized or can guarantee the tram of small piston when freely stretching out state, made small piston stroke location accurately reliable, thereby the exhaust brake that makes diesel engine reaches good effect, has also reached the purpose of the control speed of a motor vehicle simultaneously.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the utility model embodiment's a structure principle chart.
Embodiment
As Fig. 1, shown in Fig. 2 is common, air exhaust valve brake air valve bridge small piston displacement thrust device, comprise air valve bridge 1, be arranged on the small piston chamber 6 in the air valve bridge 1, in the described small piston chamber 6 small piston 2 is installed, the top of described small piston 2 is equipped with spring 7, one side of described small piston 2 bodies is provided with the descending restraining groove 3 of the described small piston 2 downward walking positions of restriction, be installed with on the described air valve bridge 1 and described descending restraining groove 3 corresponding position limit pins 4, the upper end of described descending restraining groove 3 is the lower limit plane that described small piston 2 moves downward, the small piston chamber of described air valve bridge 1 is step-like, and described small piston 2 is positioned at the big chamber of step-like cavity, and the step surface of contact 5 of the upper-end surface of described small piston 2 and step-like cavity is that going up of described small piston 2 ended face.
When small piston 2 was up in the stingy raft of pontoons 1, the upper-end surface of small piston 2 contacted with the surface of contact 5 of the stingy raft of pontoons 1, and small piston arrives top dead center; When small piston was descending, the top of the descending restraining groove 3 of small piston 2 contacted with position limit pin 3 on being installed in the stingy raft of pontoons 1, and small piston 2 reaches lower dead center.So only changing into, face is the upper-end surface of small piston 2, end down face by position limit pin 3 spacing be descending restraining groove 3 above, pressure when valve presses down is born by the top of small piston 2, when small piston 2 stretches out, it is spacing by position limit pin 3 to end face down, this power only is the power of the spring 7 of small piston 2 tops, less, even if block, bigger power also can unfreezing when valve pressed down, and made small piston 2 at pressurized or can guarantee the tram of small piston 2 when freely stretching out state, made small piston 2 strokes location accurately reliable, thereby the exhaust brake that makes diesel engine reaches good effect, has also reached the purpose of the control speed of a motor vehicle simultaneously.
Claims (1)
1. air exhaust valve brake air valve bridge small piston displacement thrust device, comprise air valve bridge (1), be arranged on the small piston chamber (6) in the air valve bridge (1), small piston (2) is installed in the described small piston chamber (6), the top of described small piston (2) is equipped with spring (7), one side of described small piston (2) body is provided with the described small piston of restriction (2) the descending restraining groove (3) of walking position downwards, be installed with on the described air valve bridge (1) and the corresponding position limit pin (4) of described descending restraining groove (3), the upper end of described descending restraining groove (3) is the lower limit plane that described small piston (2) moves downward, it is characterized in that: the small piston chamber of described air valve bridge (1) is step-like, and described small piston (2) is positioned at the big chamber of step-like cavity, and the step surface of contact (5) of the upper-end surface of described small piston (2) and step-like cavity is that going up of described small piston (2) ended face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200231459U CN201057092Y (en) | 2007-06-06 | 2007-06-06 | Small piston displacement thrust brake of exhaust valve braking air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200231459U CN201057092Y (en) | 2007-06-06 | 2007-06-06 | Small piston displacement thrust brake of exhaust valve braking air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057092Y true CN201057092Y (en) | 2008-05-07 |
Family
ID=39425933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200231459U Expired - Lifetime CN201057092Y (en) | 2007-06-06 | 2007-06-06 | Small piston displacement thrust brake of exhaust valve braking air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057092Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470329A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Valve actuating system of engine and method for generating engine auxiliary valve lift curve |
| CN103470330A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Valve actuating system of engine and method for generating engine auxiliary valve lift curve |
| CN103470328A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine |
| CN103527329A (en) * | 2010-05-27 | 2014-01-22 | 上海尤顺汽车部件有限公司 | Method and mechanical load bearing fixed chain type mechanism for generating auxiliary valve lifting curve of engine |
-
2007
- 2007-06-06 CN CNU2007200231459U patent/CN201057092Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470329A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Valve actuating system of engine and method for generating engine auxiliary valve lift curve |
| CN103470330A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Valve actuating system of engine and method for generating engine auxiliary valve lift curve |
| CN103470328A (en) * | 2010-05-27 | 2013-12-25 | 上海尤顺汽车部件有限公司 | Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine |
| CN103527329A (en) * | 2010-05-27 | 2014-01-22 | 上海尤顺汽车部件有限公司 | Method and mechanical load bearing fixed chain type mechanism for generating auxiliary valve lifting curve of engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |
|
| CX01 | Expiry of patent term |