CN204828890U - Exhaust back pressure valve - Google Patents
Exhaust back pressure valve Download PDFInfo
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- CN204828890U CN204828890U CN201520615734.0U CN201520615734U CN204828890U CN 204828890 U CN204828890 U CN 204828890U CN 201520615734 U CN201520615734 U CN 201520615734U CN 204828890 U CN204828890 U CN 204828890U
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- connecting tube
- connecting rod
- post
- pressure regulating
- connecting pipe
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Abstract
The utility model provides an exhaust back pressure valve, include: the ring flange of two relative settings links to each other through a connecting pipe between the centre bore of two ring flanges, the pressure regulating encircles the post, insert the connecting pipe by the outside of connecting pipe in, sealed pressure regulating baffle sets up in the connecting pipe to install on the pressure regulating encircles the post, activity crank, its first end are fixed in the pressure regulating column spinner and are located the outer one end of connecting pipe, the connecting rod, its first end connects with activity articulate second end hinge, the connecting rod uses the pressure regulating to rotate as the axle around the post along straight reciprocating motion, drive activity crank, and the pressure regulating surrounds the post and drives sealed pressure regulating baffle in connecting pipe internal rotation. The utility model discloses an exhaust back pressure valve through changing the aperture of its sealed pressure regulating baffle in the connecting pipe, reaches regulation and control engine exhaust pressure, realizes the experimental effect of the whole car of simulation. This exhaust back pressure valve cost is low, simple structure.
Description
Technical field
The utility model relates to motor car engine test field, particularly relates to a kind of exhaust backpressure valve.
Background technique
In existing engine test, be no matter external characteristics test or universal test or other Type Test, all need to use car load outlet pipe to ensure its simulation car load environment.But due to stand test environment and operating mode more severe compared to complete vehicle test, delivery temperature and catalyst temperature all close to over thousands of degree, under catalyst converter is in hot environment for a long time, easily burnt, tie solid.Engine back pressure now will be caused suddenly to increase, affect its performance parameter.
Too short owing to changing the catalyst converter time, within tens of hours, just can sinter once, therefore need to empty catalyst converter, avoid the generation of above-mentioned phenomenon, but for guaranteeing its boundary conditions Pass Test requirement, need adjust its exhaust pressure.But never easy to adjust, effect adjusts means preferably.Some modulating valve once used are not only heavy, and one is that degree of regulation is inadequate; Two is regulate inconvenience; Three is have gas leak phenomenon, and in process of the test, outlet pipe has some vibrations, and owing to being given a shock, the angle of swing of outlet valve will be affected generation displacement, thus exhaust pressure will change, and causes normally testing.
According to several modulating valve used in the past, effect is all undesirable.Therefore, the exhaust back pressure modulating valve buying import is wanted.But price comparison is expensive, need unit up to ten thousand.Exhaust back pressure modulating valve mainly automatic pressure regulating valve on current market, the tail gas of motor arrives exhaust braking valve after motor exhaust spout, exhaust diffuser, vent gas cooler, discharges after overregulating from outlet pipe end.Whole vent systems can regard the two―step element of a variable element as, parameter is wherein also along with the change of simulated environment and engine condition changes, when using automatic regulating valve to regulate, use PID principle to regulate, although its degree of regulation is comparatively accurate, there is the defects such as adjustment is frequent, control lag, because vent gas cooler cavity volume is excessive, be a very large inertia system, cause the relation between exhaust back pressure acquisition channel and modulating valve very complicated, react very delayed.According to actual measurement reaction result, regulating time will reach tens of second, and although exhaust backpressure valve is in exhaust port far-end, but observed temperature is about 400-500 DEG C, the too high loss also exacerbating automatic regulating valve of temperature, its adjusting circuit and control section are difficult to bear high temperature, there will be control fault after using a period of time.
Model utility content
Can sinter this technical problem to overcome in prior art the time catalyst converter carrying out automobile engine to exhaust test, the utility model provides exhaust backpressure valve.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme:
The utility model provides a kind of exhaust backpressure valve, comprising:
Two flange plate be oppositely arranged, are connected by a connecting tube between the center hole of two described flange plate;
Relief frame, around post, inserts in described connecting tube by the outside of described connecting tube;
Sealing pressure regulation baffle plate, is arranged in described connecting tube, and is installed on described relief frame on post;
Movable crank, its first end is fixed on described pressure regulation column spinner and is positioned at one end outside described connecting tube;
Connecting rod, the second end of its first end and described movable crank is hinged;
The linearly to-and-fro motion of described connecting rod, drive described movable crank with described relief frame around post for axle rotates, described relief frame moves described sealing pressure regulation baffle plate around cornice and rotates in described connecting tube; The state of described sealing pressure regulation baffle plate in described connecting tube at least comprises: the second state described connecting tube pipeline being in a setting aperture along the first state of its cross sectional occlusion and maintenance connecting tube pipeline.
Furthermore, in described exhaust backpressure valve, also comprise:
Link supports frame, a through hole offered by described link supports frame, the second end of described connecting rod through through hole, connecting rod and with described link supports frame Spielpassung;
Link supports base, its one end supports described link supports frame, and its other end and described connecting tube are fixed, and described relief frame is around the other end of post through described link supports base.
Furthermore, in described exhaust backpressure valve, between described movable crank and described connecting rod, connect a crank auxiliary connection.
Furthermore, in described exhaust backpressure valve, described connecting rod is provided with standby female nut, described standby female nut is arranged at the both sides of described through hole respectively; The diameter of described standby female nut is greater than the diameter of described through hole.
Furthermore, in described exhaust backpressure valve, described flange plate is triangle, and the position at each angle of described flange plate arranges a fixing threaded hole.
The beneficial effects of the utility model are: exhaust backpressure valve of the present utility model, by changing the aperture of its sealing pressure regulation baffle plate in connecting tube, reach regulation and control engine back pressure, realize simulation complete vehicle test effect.This exhaust backpressure valve cost is low, structure is simple.
Accompanying drawing explanation
Fig. 1 represents the structural front view of exhaust backpressure valve in the utility model embodiment;
Fig. 2 represents the structure plan view of exhaust backpressure valve in the utility model embodiment;
Moment of torsion and fuel consumption variations plotted curve when Fig. 3 represents the full-gear of exhaust backpressure valve in the utility model embodiment;
Exhaust back pressure and catalyst temperature change curve when Fig. 4 represents the full-gear of exhaust backpressure valve in the utility model embodiment;
Moment of torsion and fuel consumption variations plotted curve when Fig. 5 represents the full load state of exhaust backpressure valve in the utility model embodiment;
Exhaust back pressure and catalyst temperature change curve when Fig. 6 represents the full load state of exhaust backpressure valve in the utility model embodiment.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearly, below in conjunction with the accompanying drawings and the specific embodiments the utility model is described in detail.
Shown in seeing figures.1.and.2, the utility model provides a kind of exhaust backpressure valve, comprising: be connected by a connecting tube 10 between the center hole of two flange plate be oppositely arranged, 1, two flange plate 1; Relief frame, around post 3, inserts in connecting tube 10 by the outside of connecting tube 1; Sealing pressure regulation baffle plate 2, is arranged in connecting tube 10, and is installed on relief frame on post 3; Movable crank 6, its first end is fixed on institute's pressure regulation column spinner 3 and is positioned at one end outside connecting tube 10; Connecting rod 8, the second end of its first end and movable crank 6 is hinged; Connecting rod 8 linearly to-and-fro motion, drive activity crank 6 with relief frame around post 3 for axle rotates, relief frame is with motive sealing pressure regulation baffle plate 2 to rotate in connecting tube 10 around post 3; The state of sealing pressure regulation baffle plate 2 in connecting tube 10 at least comprises: by the pipeline of connecting tube 10 along the first state of its cross sectional occlusion and keep the pipeline of connecting tube 10 to be in the second state of a setting aperture.
Specifically, when flange plate 1 accesses in vent systems to be tested, exhaust backpressure valve is comprised: outlet valve realizes the constituent element sealing pressure regulation baffle plate 2 of voltage regulation function and relief frame around post 3, and the movable crank 6 of barrier driving part, crank auxiliary connection 7 and connecting rod 8.Its working principle passes through connecting rod) the front and back action of 8, movable crank 6 is pulled to carry out cycling action, and movable crank 6 connects as one around post 3 with relief frame, relief frame is driven to rotate voluntarily around post 3, thus drive sealing pressure regulation baffle plate 2 and outlet pipe section angulation, produce pressure drag by sealing pressure regulation baffle plate 2, the resistance that simulation ternary catalyzing unit produces, reach regulation and control engine back pressure, realize simulation complete vehicle test effect.This exhaust backpressure valve cost is low, structure is simple.
Furthermore, exhaust backpressure valve also comprises: link supports frame 9, link supports frame 9 is offered a through hole, the second end of connecting rod 8 through through hole, connecting rod 8 and with link supports frame 9 Spielpassung; Link supports base 5, its one end support link supporting frame 9, its other end and connecting tube 10 are fixed, and relief frame is around the other end of post 3 through link supports base 5.A crank auxiliary connection 7 is connected between movable crank 6 and connecting rod 8.Connecting rod 8 is provided with standby female nut 11, standby female nut 11 is arranged at the both sides of through hole respectively; The diameter of standby female nut 11 is greater than the diameter of through hole.Flange plate is 1 triangle, the position at each angle of flange plate is arranged a fixing threaded hole 4.
For drive link 8 carries out front and back action, the link supports frame 9 be fixed on above link supports base 5 punches, aperture is slightly larger than the diameter of connecting rod 8, but be less than its diameter for female nut 11, because connecting rod 8 is entire body connecting rod, we can respectively add one for female nut 11 at the two ends of link supports frame 9, moved back and forth by the cooperation drivening rod 8 of two ends for female nut 11.And flange plate 1 is coordinated with the triangle flange of outlet pipe by bolt, bolt is by the fixing threaded hole 4 of triangle flange.Consider the high temperature at flange plate 1 place, install thermal-protective coating additional and prevent from burning to death.
With reference to shown in Fig. 3 and Fig. 4, we can find out, when exhaust backpressure valve standard-sized sheet, be equivalent to do not have exhaust resistance, therefore torque power has small size rise, and oil consumption also increases thereupon simultaneously, and this demonstrates the necessity of exhaust backpressure valve from practice.After outlet pipe is emptied, we can find out that exhaust back pressure difference increases gradually along with rotating speed increase, the nearly 10kPa of decline amplitude peak, and this is the basic reason causing power oil changes, and catalyst converter is owing to emptying, and temperature declines more than 100 degrees Celsius.
With reference to shown in Fig. 5 and Fig. 6, to exhaust back pressure simulation test, we adjust exhaust back pressure valve opening, make it at full speed full load (6000rpm, WOT), time, be consistent when exhaust pressure and catalyst converter are not emptied (51.5kPa), fix exhaust back pressure valve opening subsequently, contrast when its major parameter and catalyst converter are not emptied, drafting pattern
After use exhaust backpressure valve simulation catalyst converter resistance, contrasted by test data, the fluctuation having several N.m is contrasted when can find that moment of torsion and catalyst converter are not emptied, but it is better substantially to belong to conformity, oil consumption, exhaust pressure and original state have almost no change, and catalyst converter is owing to being emptied, temperature declines over one hundred degree.
Above-described is preferred implementation of the present utility model; should be understood that the ordinary person for the art; can also make some improvements and modifications not departing under principle prerequisite described in the utility model, these improvements and modifications are also in protection domain of the present utility model.
Claims (5)
1. an exhaust backpressure valve, is characterized in that, comprising:
Two flange plate be oppositely arranged, are connected by a connecting tube between the center hole of two described flange plate;
Relief frame, around post, inserts in described connecting tube by the outside of described connecting tube;
Sealing pressure regulation baffle plate, is arranged in described connecting tube, and is installed on described relief frame on post;
Movable crank, its first end is fixed on described pressure regulation column spinner and is positioned at one end outside described connecting tube;
Connecting rod, the second end of its first end and described movable crank is hinged;
The linearly to-and-fro motion of described connecting rod, drive described movable crank with described relief frame around post for axle rotates, described relief frame moves described sealing pressure regulation baffle plate around cornice and rotates in described connecting tube; The state of described sealing pressure regulation baffle plate in described connecting tube at least comprises: the second state described connecting tube pipeline being in a setting aperture along the first state of its cross sectional occlusion and maintenance connecting tube pipeline.
2. exhaust backpressure valve as claimed in claim 1, is characterized in that, also comprise:
Link supports frame, a through hole offered by described link supports frame, the second end of described connecting rod through through hole, connecting rod and with described link supports frame Spielpassung;
Link supports base, its one end supports described link supports frame, and its other end and described connecting tube are fixed, and described relief frame is around the other end of post through described link supports base.
3. exhaust backpressure valve as claimed in claim 1, is characterized in that, connect a crank auxiliary connection between described movable crank and described connecting rod.
4. exhaust backpressure valve as claimed in claim 2, is characterized in that, described connecting rod is provided with standby female nut, and described standby female nut is arranged at the both sides of described through hole respectively; The diameter of described standby female nut is greater than the diameter of described through hole.
5. exhaust backpressure valve as claimed in claim 1, it is characterized in that, described flange plate is triangle, and the position at each angle of described flange plate arranges a fixing threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520615734.0U CN204828890U (en) | 2015-08-14 | 2015-08-14 | Exhaust back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520615734.0U CN204828890U (en) | 2015-08-14 | 2015-08-14 | Exhaust back pressure valve |
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| Publication Number | Publication Date |
|---|---|
| CN204828890U true CN204828890U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520615734.0U Active CN204828890U (en) | 2015-08-14 | 2015-08-14 | Exhaust back pressure valve |
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| CN (1) | CN204828890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296843A (en) * | 2019-05-07 | 2019-10-01 | 东风汽车集团有限公司 | Pressure difference simulator and connection structure |
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2015
- 2015-08-14 CN CN201520615734.0U patent/CN204828890U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296843A (en) * | 2019-05-07 | 2019-10-01 | 东风汽车集团有限公司 | Pressure difference simulator and connection structure |
| CN110296843B (en) * | 2019-05-07 | 2020-05-19 | 东风汽车集团有限公司 | Differential pressure simulation device and connection structure |
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