CN101413598A - Pressure-limiting valve integrated with high back pressure exhaust brake valve - Google Patents
Pressure-limiting valve integrated with high back pressure exhaust brake valve Download PDFInfo
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- CN101413598A CN101413598A CNA2007100562009A CN200710056200A CN101413598A CN 101413598 A CN101413598 A CN 101413598A CN A2007100562009 A CNA2007100562009 A CN A2007100562009A CN 200710056200 A CN200710056200 A CN 200710056200A CN 101413598 A CN101413598 A CN 101413598A
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Abstract
The invention provides a pressure limit valve integrated with a high back-pressure exhaust brake valve. The pressure limit valve is characterized in that the valve consists of a valve body of an exhaust brake valve, a valve body of a pressure limit valve, a spring, a spring base, a nut, an adjusting bolt, a valve flap, a butterfly valve, an air inlet end, an air outlet end and a bypass passage; the spring base, the spring and the valve flap are sequentially arranged in the valve body of the pressure limit valve; the valve flap seals the valve body of the pressure limit valve; the valve body of the exhaust brake valve is provided with the bypass passage; the valve body of the pressure limit valve and the valve body of the exhaust brake valve are installed together; one end of the adjusting bolt contacts with the spring base; the nut is arranged at the other end of the adjusting bolt; the pressure limit valve integrated with a high back-pressure exhaust brake valve has the advantages of optimizing the exhaust back-pressure and improving the brake power.
Description
Technical field
The invention belongs to the technical field of automobile exhaust brake valve pressure-limit valve, particularly a kind of pressure-limit valve of high back pressure exhaust brake valve one.
Background technique
Characteristics such as exhaust braking valve is made simply because its braking force is bigger, and cost is low have been widely used on the high-power commercial car.When commercial car is travelled in the road surface situation preferably on the road, when needing to slow down, the independent exhaust braking valve that uses just can reach gratifying braking effect, and when travelling in the bad area of road conditions, for example travel when some often have the mountain area on long sharp decline road, generally exhaust brake and engine braking are united use, to improve braking force.
Existing exhaust braking valve kind is a lot, and they normally are made up of parts such as butterfly valve, valve body and cylinders, are installed in the gas exhaust manifold back of motor, or are installed in the pressurized machine back.
When exhaust braking valve is worked, the rotation of cylinder control butterfly valve, outlet pipe is blocked, exhaust back pressure in the outlet pipe increases, piston motion is produced resistance, and this resistance is by bent axle, and the power train of automobile etc. passes to wheel, form braking force, thereby played the effect of giving motor and car deceleration.
When exhaust braking valve is worked, can set up higher exhaust back pressure, the size of exhaust back pressure is relevant with engine speed, and engine speed is big more, pours in the outlet pipe with regard to having many more exhausts, and exhaust back pressure also just increases thereupon.Exhaust back pressure is big more, and the braking force of motor is just big more, so, by increasing the mode of exhaust back pressure, can improve the braking force of motor.But, exhaust back pressure can not unrestrictedly increase, because exhaust back pressure is big more, the heat of motor is just big more, because the effect of exhaust braking valve, heat release is slowed down, especially when the high rotating speed of motor, exhaust back pressure surpasses the limit value that motor can bear probably, and motor will be in superheat state, this can give the life-span of motor, and power character etc. are brought very big infringement.This problem is more obvious on the motor that the exhaust braking valve that high back pressure can be provided is housed.In addition, when the butterfly valve of exhaust braking valve cuts out, exhaust back pressure in the outlet pipe increases, exhaust back pressure acts on the exhaust valve back cone, when exhaust back pressure pressure surpasses making a concerted effort of exhaust valve initial tension of spring and cylinder pressure, the secondary opening phenomenon can appear in exhaust valve, will be to the component of distribution device, and especially exhaust valve causes bigger infringement.
Summary of the invention
The objective of the invention is provides a kind of pressure-limit valve of high back pressure exhaust brake valve one at the said structure problem.
Technological scheme of the present invention is achieved in that
The pressure-limit valve of high back pressure exhaust brake valve one, it is characterized by: it is made up of the valve body of exhaust braking valve and valve body, spring, spring seat, nut, adjustment screw, flap, butterfly valve, inlet end, exhaust end, the bypass path of pressure-limit valve, spring seat, spring, flap are installed in the valve body of pressure-limit valve successively, the valve body of flap sealed pressure-limiting valve, valve body at exhaust braking valve has the bypass path, the valve body of pressure-limit valve and the valve body of exhaust braking valve are installed together, an end of adjusting bolt contacts with spring seat, and nut is installed in the other end of adjusting bolt.
The pressure-limit valve of high back pressure exhaust brake valve one of the present invention has the optimization exhaust back pressure, improves the advantage of braking force.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Specific embodiments
Describe concrete technological scheme of the present invention in detail below in conjunction with accompanying drawing.
The pressure-limit valve of high back pressure exhaust brake valve one, it is characterized by: it is by the valve body 1 of exhaust braking valve and the valve body 2 of pressure-limit valve, spring 3, spring seat 4, nut 5, adjust screw 6, flap 7, butterfly valve 8, inlet end 9, exhaust end 10, bypass path 11 is formed, spring seat 4, spring 3, flap 7 is installed in the valve body 2 of pressure-limit valve successively, the valve body 2 of flap 7 sealed pressure-limiting valves, valve body 1 at exhaust braking valve has bypass path 11, the valve body 2 of pressure-limit valve and the valve body 1 of exhaust braking valve are installed together, an end of adjusting bolt 6 contacts with spring seat 4, and nut 5 is installed in the other end of adjusting bolt 6.
Embodiment:
As shown in Figure 1, spring seat 4, spring 3, flap 7 is installed in the valve body 2 of pressure-limit valve successively, the valve body 2 of pressure-limit valve and the valve body 1 of exhaust braking valve are installed together, flap 7 is sealed on the valve body 1 of the valve body 2 of pressure-limit valve and exhaust braking valve, an end of adjusting bolt 6 contacts with spring seat 4, nut 5 is installed in the other end of adjusting bolt 6, valve body 1 at exhaust braking valve has bypass path 11, the inlet of bypass path 11 is by flap 7 sealings, the outlet of bypass path 11 communicates with outlet pipe, adjust bolt 6, nut 5 and spring seat 4 are used for the pretightening force of Regulation spring 3, flap 7 contacts an end with spring 3 have a chimb 12, and chimb 12 is complementary with spring 3, prevents that flap 7 from opening excessive and excess compression spring 3, the valve body of pressure-limit valve can manufacture one with exhaust braking valve, also can make separately.
When exhaust braking valve was worked, cylinder worked, and rotation butterfly valve 8 is to closed position, and outlet pipe gets clogged, and at this moment, because engine speed is lower, exhaust back pressure is also lower, and the exhaust pressure that enters pressure-limit valve by inlet end 9 is not enough to open pressure-limit valve; Rising along with the rotating speed of motor, exhaust back pressure also raises gradually, when near the maximum exhaust back pressure limit value that starts that function bears, exhaust enters pressure-limit valve by inlet end 9 and acts on the flap 7, and when exhaust back pressure during near limit value, flap 7 overcomes the pretightening force of spring 3 and opens, be that pressure-limit valve is opened, exhaust enters the suction port of bypass path 11, discharges the exhaust end 10 that enters outlet pipe from the outlet of bypass path 11, and outlet pipe is drawn back in exhaust.
Among the present invention, only use spring, do not considering under the condition of cost as the control core, can use hydraulic pressure installation, solenoid valve as required, sensor, devices such as ECU are realized the multistage adjustable of exhaust back pressure, for example, by temperature, pressure transducer etc. are gathered the temperature and the back pressure signal of engine interior, signal calculates optimum value by ECU, the device of drive controlling flap, thus optimize exhaust back pressure, optimize exhaust brake power.In addition, this device can also be applied to whole engine braking system, even in the braking system of whole car load, thereby draw an optimized braking effect.
Above the specific embodiment of the invention is described in detail in conjunction with the accompanying drawings, but the present invention is not limited to the foregoing description, as long as all belong to the present invention without prejudice to notion of the present invention and other mapping modes of not exceeding the scope of the invention.
Claims (3)
1, the pressure-limit valve of high back pressure exhaust brake valve one, it is characterized by: it is the valve body (2) by valve body of exhaust braking valve (1) and pressure-limit valve, spring (3), spring seat (4), nut (5), adjust screw (6), flap (7), butterfly valve (8), inlet end (9), exhaust end (10), bypass path (11) is formed, spring seat (4), spring (3), flap (7) is installed in the valve body (2) of pressure-limit valve successively, the valve body (2) of flap (7) sealed pressure-limiting valve, valve body (1) at exhaust braking valve has bypass path (11), the valve body (1) of valve body of pressure-limit valve (2) and exhaust braking valve is installed together, an end of adjusting bolt (6) contacts with spring seat (4), and nut (5) is installed in the other end of adjusting bolt (6).
2, the double connecting tubes pressure-limit valve of high back pressure exhaust brake valve according to claim 1 is characterized in that: described flap (7) contacts an end with spring (3) a chimb (12), and chimb (12) is complementary with spring (3).
3, according to the double connecting tubes pressure-limit valve of claim 1 or the described high back pressure exhaust brake valve of claim 2, it is characterized in that: the inlet of described bypass path (11) is by flap (7) sealing, and the outlet of bypass path (11) communicates with outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100562009A CN101413598A (en) | 2007-10-19 | 2007-10-19 | Pressure-limiting valve integrated with high back pressure exhaust brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100562009A CN101413598A (en) | 2007-10-19 | 2007-10-19 | Pressure-limiting valve integrated with high back pressure exhaust brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101413598A true CN101413598A (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100562009A Pending CN101413598A (en) | 2007-10-19 | 2007-10-19 | Pressure-limiting valve integrated with high back pressure exhaust brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101413598A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233823A (en) * | 2013-04-28 | 2013-08-07 | 深圳市特尔佳科技股份有限公司 | Constant-pressure exhaust braking method and constant-pressure exhaust braking butterfly valve |
-
2007
- 2007-10-19 CN CNA2007100562009A patent/CN101413598A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233823A (en) * | 2013-04-28 | 2013-08-07 | 深圳市特尔佳科技股份有限公司 | Constant-pressure exhaust braking method and constant-pressure exhaust braking butterfly valve |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090422 |