CN101413597A - Double connecting tubes pressure-limiting valve for high back pressure exhaust brake valve - Google Patents
Double connecting tubes pressure-limiting valve for high back pressure exhaust brake valve Download PDFInfo
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- CN101413597A CN101413597A CNA2007100561970A CN200710056197A CN101413597A CN 101413597 A CN101413597 A CN 101413597A CN A2007100561970 A CNA2007100561970 A CN A2007100561970A CN 200710056197 A CN200710056197 A CN 200710056197A CN 101413597 A CN101413597 A CN 101413597A
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Abstract
The invention provides a dual-connection pipe pressure limit valve of a high back-pressure exhaust brake valve, which is characterized in that the valve consists of a valve body a and a valve body b, a valve flap, an adjusting bolt, a nut, a spring base and a spring; the spring base, the spring and the valve flap are sequentially arranged in the valve body a; the valve body a and the valve body b are installed together; the valve flap is sealed on the valve body b; one end of the adjusting bolt contacts with the spring base; the nut is arranged at the other end of the adjusting bolt; the position on the side surface of the valve body b deviating towards the middle part is provided with a pressure inlet; the end surface of the valve body b is provided with a pressure hole. The dual-connection pipe pressure limit valve of a high back-pressure exhaust brake valve has the advantages of optimizing the exhaust back-pressure and improving the brake power, can provide a stable and exact pressure source at the same time, and simplifies the calculation and selection of the spring.
Description
Technical field
The invention belongs to the technical field of automobile exhaust brake valve pressure-limit valve, particularly a kind of double connecting tubes pressure-limit valve of high back pressure exhaust brake valve.
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 at the said structure problem, a kind of double connecting tubes pressure-limit valve of high back pressure exhaust brake valve is provided.
Technological scheme of the present invention is achieved in that
The double connecting tubes pressure-limit valve of high back pressure exhaust brake valve, it is characterized by: it is made up of valve body a and valve body b, flap, adjustment bolt, nut, spring seat, spring, spring seat, spring, flap are installed in the valve body a successively, valve body a and valve body b are installed together, flap is sealed on the valve body b, and an end of adjusting bolt contacts with spring seat, and nut is installed in the other end of adjusting bolt, the middle part has pressure entrance partially in the side of valve body b, has pressure port at the end face of valve body b.
The double connecting tubes pressure-limit valve of high back pressure exhaust brake valve of the present invention has the optimization exhaust back pressure, improves the advantage of braking force, and a stable and pressure source more accurately can be provided simultaneously, makes the calculating of spring and choose to become simple.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a use mounting structure schematic representation of the present invention.
Specific embodiments
Describe concrete technological scheme of the present invention in detail below in conjunction with accompanying drawing.
The double connecting tubes pressure-limit valve of high back pressure exhaust brake valve, it is characterized by: it is made up of valve body a1 and valve body b2, flap 3, adjustment bolt 7, nut 6, spring seat 8, spring 5, spring seat 8, spring 5, flap 3 are installed in the valve body a1 successively, valve body a1 and valve body b2 are installed together, flap 3 is sealed on the valve body b2, an end of adjusting bolt 7 contacts with spring seat 8, nut 6 is installed in the other end of adjusting bolt 7, the middle part has pressure entrance 11 partially in the side of valve body b, has pressure port 10 at the end face of valve body b.
Embodiment:
As Fig. 1 and Fig. 2 as can be known, pressure-limit valve valve body a1 and valve body b2 are installed together, flap 3 tightly is sealed on the valve body b2 under the pretightening force effect of spring 5, why valve body is made two-part, the one, for easy to process, flap 3 has two sealing surfaces, the one side of the valve body b2 of the exhaust port that sealing surface 4 sealed valve body b2 and valve body a1 form, the pressure port 10 of sealing surface 9 sealed valve body b2, between two sealing surfaces LAP being arranged, is pressure entrance 11 at the valve body b2 of this section stroke correspondence, and flap 3 contacts an end with spring have a chimb 13, chimb 13 is complementary with spring 5, prevents that flap 3 from opening excessive and excess compression spring 5; The surface of contact of flap 3 and valve body b2, promptly sealing surface needs the higher grinding of precision, with the assurance sealing, the 2nd, in order to enlarge exhaust space, so that gas is discharged rapidly; Adjust bolt 7, nut 6 and spring seat 8 and be used for the pretightening force of Regulation spring 5.
When exhaust braking valve 16 work, cylinder 18 works, and the rotation butterfly valve is to closed position, outlet pipe gets clogged, at this moment, because engine speed is lower, exhaust back pressure is also lower, and the exhaust pressure that enters pressure-limit valve 17 by connecting tube 14 and connecting tube 15 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, part exhaust acts on the flap 3 by the pressure port 10 that connecting tube 15 enters pressure-limit valve 17, another part exhaust enters pressure-limit valve 17 pressure entrances 11 by connecting tube 14, when exhaust back pressure during near limit value, flap 3 overcomes the pretightening force of spring 5 and opens, be that pressure-limit valve 17 is opened, exhaust is by pressure entrance 11, discharge into the atmosphere from exhaust port 12 discharges, when it is noted that herein owing to exhaust brake work, the motor fuel cut-off, so the waste gas of discharging is hot air, can pressure-limit valve 17 be arranged in the place that ventilation better and does not on every side have thermo-labile part according to the layout needs of motor, like this hot air of Pai Chuing can large size and atmosphere carry out heat exchange, delivery temperature reduces rapidly, can not cause damage to other part.
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 double connecting tubes pressure-limit valve of high back pressure exhaust brake valve, it is characterized by: it is by valve body a (1) and valve body b (2), flap (3), adjust bolt (7), nut (6), spring seat (8), spring (5) is formed, spring seat (8), spring (5), flap (3) is installed in the valve body a (1) successively, valve body a (1) and valve body b (2) are installed together, flap (3) is sealed on the valve body b (2), an end of adjusting bolt (7) contacts with spring seat (8), nut (6) is installed in the other end of adjusting bolt (7), the middle part has pressure entrance (11) partially in the side of valve body b (2), has pressure port (10) at the end face of valve body b (2).
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 (3) contacts an end with spring (5) a chimb (13), and chimb (13) is complementary with spring (5).
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: described flap (3) has two sealing surfaces, the one side of the valve body b (2) of the exhaust port (12) that a sealing surface (4) sealed valve body b (2) and valve body a (1) form, the pressure port (10) of a sealing surface (9) sealed valve body b (2) has LAP between two sealing surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100561970A CN101413597A (en) | 2007-10-19 | 2007-10-19 | Double connecting tubes pressure-limiting valve for high back pressure exhaust brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100561970A CN101413597A (en) | 2007-10-19 | 2007-10-19 | Double connecting tubes pressure-limiting valve for high back pressure exhaust brake valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101413597A true CN101413597A (en) | 2009-04-22 |
Family
ID=40594263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100561970A Pending CN101413597A (en) | 2007-10-19 | 2007-10-19 | Double connecting tubes pressure-limiting valve for high back pressure exhaust brake valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101413597A (en) |
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2007
- 2007-10-19 CN CNA2007100561970A patent/CN101413597A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090422 |