CN101413442A - High back pressure exhaust brake valve with pressure-limiting valve - Google Patents
High back pressure exhaust brake valve with pressure-limiting valve Download PDFInfo
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- CN101413442A CN101413442A CNA200710056199XA CN200710056199A CN101413442A CN 101413442 A CN101413442 A CN 101413442A CN A200710056199X A CNA200710056199X A CN A200710056199XA CN 200710056199 A CN200710056199 A CN 200710056199A CN 101413442 A CN101413442 A CN 101413442A
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Abstract
The invention relates to a high back pressure exhaust brake valve, which comprises a cylinder and an exhaust brake valve, wherein the cylinder and the exhaust brake valve are arranged together. The high back pressure exhaust brake valve is characterized by also comprising a pressure limiting valve and a connecting pipe; the pressure limiting valve is connected with the exhaust brake valve through the connecting pipe; and the pressure limiting valve is provided with an exhaust hole. The high back pressure exhaust brake valve has the advantages of optimizing exhaust back pressure, and improving the brake power.
Description
Technical field
The invention belongs to the technical field of automobile exhaust brake valve, particularly a kind of high back pressure exhaust brake valve with pressure-limit 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 high back pressure exhaust brake valve with pressure-limit valve is provided.
Technological scheme of the present invention is achieved in that
The high back pressure exhaust brake valve of band pressure-limit valve, it includes cylinder, exhaust braking valve, and cylinder and exhaust braking valve are installed together, and it is characterized in that: it also comprises pressure-limit valve and connecting tube, pressure-limit valve is connected with exhaust braking valve by connecting tube, has exhaust port on the pressure-limit valve.
The high back pressure exhaust brake valve of band pressure-limit valve of the present invention has the optimization exhaust back pressure, improves the advantage of braking force.
Description of drawings
Fig. 1 is first kind of exhaust braking valve assembly structure schematic representation of the present invention.
Fig. 2 is second kind of exhaust braking valve assembly structure schematic representation provided by the present invention.
Fig. 3 is the third exhaust braking valve assembly structure schematic representation provided by the present invention.
Specific embodiments
Describe concrete technological scheme of the present invention in detail below in conjunction with accompanying drawing.
Pressure-limit valve provided by the present invention, after exhaust braking valve was closed, when exhaust back pressure reached the limit value of motor, pressure-limit valve was opened, and discharges a certain amount of exhaust, so that exhaust back pressure maintains in the scope that a motor can bear.
Embodiment 1:
As shown in Figure 1, the high back pressure exhaust brake valve of band pressure-limit valve, it includes cylinder 1, exhaust braking valve 2, cylinder 1 is installed together with exhaust braking valve 2, it is characterized in that: it also comprises pressure-limit valve 3 and connecting tube 4, pressure-limit valve 3 is connected with exhaust braking valve 2 by connecting tube 4, has exhaust port 5 on the pressure-limit valve 3.
When exhaust braking valve was worked, cylinder 1 worked, and the rotation butterfly valve 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 3 by connecting tube 4 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, pressure-limit valve 3 is opened, and discharge into the atmosphere by exhaust port 5, should be noted that herein, because during exhaust brake work, the motor fuel cut-off, so the waste gas of discharging is hot air, can be according to the layout needs of motor, pressure-limit valve 3 is arranged in the place that ventilation better and does not on every side have thermo-labile part, 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.
Embodiment 2:
As shown in Figure 2, pressure-limit valve 3 of the present invention is connected with exhaust braking valve 2 with connecting tube 6 by connecting tube 4, and connecting tube 4 is for pressure-limit valve 3 provides pressure source, and connecting tube 6 provides exhaust source for pressure-limit valve 3.The advantage of this structure is that a stable and pressure source more accurately can be provided, and makes the calculating of spring and choose to become simple.
Embodiment 3:
As shown in Figure 3, pressure-limit valve 3 of the present invention is made one with exhaust braking valve 2, the valve body of pressure-limit valve 3 and the valve body of exhaust braking valve are one, the valve body of exhaust braking valve has the bypass path, the inlet of bypass path communicates with the exhaust entrance 9 of the outlet pipe of exhaust braking valve and by pressure-limit valve 3 sealings, the outlet of bypass path communicates with the exhaust outlet 10 of the outlet pipe of exhaust braking valve.
This pressure-limit valve 3 also can be made separately.
Structure of the present invention is not limited to above-mentioned three kinds, and its essence is to install a pressure-limit valve additional to the engine exhaust and brake valve, perhaps directly pressure-limit valve and exhaust braking valve is manufactured one.The effect of this pressure-limit valve is that after the exhaust braking valve butterfly valve cuts out the exhaust back pressure of control engine interior is no more than the threshold limit value of starting function to bear.
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 high back pressure exhaust brake valve of band pressure-limit valve, it includes cylinder (1), exhaust braking valve (2), cylinder (1) is installed together with exhaust braking valve (2), it is characterized in that: it also comprises pressure-limit valve (3) and connecting tube (4), pressure-limit valve (3) is connected with exhaust braking valve (2) by connecting tube (4), has exhaust port (5) on the pressure-limit valve (3).
2, the high back pressure exhaust brake valve of band pressure-limit valve according to claim 1 is characterized in that: described pressure-limit valve (3) is connected with exhaust braking valve (2) with connecting tube (6) by connecting tube (4).
3, the high back pressure exhaust brake valve of band pressure-limit valve according to claim 1, it is characterized in that: described pressure-limit valve (3) is made one with exhaust braking valve (2), the valve body of pressure-limit valve (3) and the valve body of exhaust braking valve are one, the valve body of exhaust braking valve has the bypass path, the inlet of bypass path communicates with the exhaust entrance (9) of exhaust brake exhaust tube and by pressure-limit valve (3) sealing, the outlet of bypass path communicates with the exhaust outlet (10) of exhaust brake exhaust tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710056199XA CN101413442A (en) | 2007-10-19 | 2007-10-19 | High back pressure exhaust brake valve with pressure-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710056199XA CN101413442A (en) | 2007-10-19 | 2007-10-19 | High back pressure exhaust brake valve with pressure-limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101413442A true CN101413442A (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710056199XA Pending CN101413442A (en) | 2007-10-19 | 2007-10-19 | High back pressure exhaust brake valve with pressure-limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101413442A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452676A (en) * | 2013-09-11 | 2013-12-18 | 大连理工大学 | Engine exhaust brake control system and control method |
-
2007
- 2007-10-19 CN CNA200710056199XA patent/CN101413442A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452676A (en) * | 2013-09-11 | 2013-12-18 | 大连理工大学 | Engine exhaust brake control system and control method |
| CN103452676B (en) * | 2013-09-11 | 2015-10-28 | 大连理工大学 | A kind of engine exhaust and brake control system and controlling method |
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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 |