CN203614173U - DPF failure simulation device - Google Patents
DPF failure simulation device Download PDFInfo
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- CN203614173U CN203614173U CN201320792920.2U CN201320792920U CN203614173U CN 203614173 U CN203614173 U CN 203614173U CN 201320792920 U CN201320792920 U CN 201320792920U CN 203614173 U CN203614173 U CN 203614173U
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- dpf
- pipe joint
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- rate adjustment
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Abstract
The utility model relates to the technical field of diesel engine exhaust certification devices and provides a DPF failure simulation device which comprises a DPF communicated with an engine exhaust pipe, wherein two ends of the DPF are connected with differential pressure sensors. The DPF failure simulation device further comprises a bypass pipe connected with the DPF in parallel, wherein the bypass pipe is communicated with the engine exhaust pipe, and a flow regulation part is arranged on the bypass pipe. The bypass pipe communicated with the exhaust pipe is connected to the two ends of the DPF in parallel, flow control is performed through the flow regulation part, therefore, flow of exhausted gas flowing through the DPF is controlled, and the failure of the DPF can be simulated. The DPF failure simulation device is simple in structure, convenient to operate and capable of avoiding uncorrectable and permanent damage to a DPF body and reducing cost.
Description
Technical field
The utility model belongs to diesel engine emissions authenticating device technical field, relates in particular to a kind of DPF crash simulation device.
Background technique
Diesel engine, because of its good power character and economical, is widely used in city bus and truck, and particle and the nitrogen oxide of diesel emission become one of primary pollution source of urban atmosphere; Strict gradually along with Abgasgesetz, diesel particulate emission level and quantity are clearly proposed to reduce, grain catcher (Diesel Particulate Filter, DPF) be considered to reduce particulate matter the most effectively, device that technology is relatively ripe.DPF has become one of requisite critical component of Europe six engine aftertreatment systems, in the six certification test processes of the Europe of motor, need to detect the emission level after vehicle long-play, now DPF trapping deleterious, there is failure phenomenon, when authentication, need to detect the PM value under this state.So before authentication engine, the DPF device that each producer need to prepare to lose efficacy is used for simulating the state after long-time use.
DPF is similar to the cellular structure being pressed, the similar chessboard of entirety style, every two adjacent passages, an inlet is plugged, another is plugged in outlet port, exhaust, from a passage flows into, must be flowed out from adjacency channel through ceramic porosity wall, and the particle in exhaust is just deposited on the wall of each flow channel.Under normal circumstances, the most of particle in exhaust can be captured, and the particulate matter that flows out DPF is little.The failure mode of DPF is usually expressed as burning of passage, is burning region, and engine exhaust directly flows through DPF, the now granule capturing deleterious of DPF, and it is large that PM value can become, and the pressure reduction recording by the differential pressure pickup at DPF two ends reduces.
The mode that conventional analog D PF lost efficacy is: in DPF interior carrier, get through hole, make part exhaust directly flow through DPF, this part particle can not be captured, simulate failure degree by the number of punching and the size in punching aperture, directly translate into the variation of the pressure reduction at DPF two ends, when more the or aperture of punching number is larger, two ends pressure reduction can be less.
The DPF crash simulation device that uses the method for punching to make, can cause expendable damage to DPF body, and DPF carrier mostly is ceramic-like materials, is easy to be broken when punching, need to prepare multiple DPF; In addition, punching aperture and number are uncertain, and excessive the leading to the failure that be easy to punch scrapped, and waste material need veteran personnel to punch, and elapsed time is longer.
Meanwhile, conventionally want in order to simulate the pressure difference that reaches, whether hole count and the pore size that must verify step by step by experiment and improve original design be suitable, and it tests complex operation, more difficult realization.
Model utility content
The purpose of this utility model is to provide a kind of DPF crash simulation device, be intended to solve DPF crash simulation testing apparatus common in prior art in the time that DPF crash simulation is tested, cause DPF unrepairable damage, consume DPF quantity many, consuming time length, not easy to operate etc. problem.
The utility model is to realize like this, a kind of DPF crash simulation device, described DPF crash simulation device comprises the DPF being communicated with motor blowdown piping, described DPF two ends connect differential pressure pickup, described device also comprises the bypass tube being arranged in parallel with described DPF, described bypass tube is communicated with described motor blowdown piping, and Flow-rate adjustment part is installed on described bypass tube.
As a kind of improved plan, described bypass tube is provided with the first pipe joint and the second pipe joint, one end of described the first pipe joint is fixedly connected on the exhaust duct of described DPF suction port end, the other end is connected with one end of described the second pipe joint by described Flow-rate adjustment part, and the other end of described the second pipe joint is fixedly connected on the exhaust duct of described DPF air outlet end.
As a kind of improved plan, described the first pipe joint is fixed on the exhaust duct of described DPF suction port end by the mode of welding.
As a kind of improved plan, described the second pipe joint is fixed on the exhaust duct of described DPF air outlet end by the mode of welding.
As a kind of improved plan, described Flow-rate adjustment part is the flange of several different inner diameters of connecting with described the first pipe joint and the second pipe joint.
As a kind of improved plan, described Flow-rate adjustment part comprises the flange connecting with described the first pipe joint and the second pipe joint, and described flange disposes the through hole sheet of several different inner diameters.
As a kind of improved plan, described Flow-rate adjustment part is the pressure regulator valve connecting with described the first pipe joint and the second pipe joint.
Due to the bypass tube being communicated with exhaust duct in the parallel connection of DPF two ends, carry out flow control by Flow-rate adjustment part, realize the control of the extraction flow to the DPF that flows through, reach the degree that analog D PF lost efficacy, it is simple in structure, easy to operate, avoid DPF body to cause unrepairable and permanent damage, reduce costs.
Because bypass tube is provided with the first pipe joint and the second pipe joint, the first pipe joint and the second pipe joint are separately fixed on the exhaust duct at DPF two ends, and are communicated with, and the first pipe joint is connected by Flow-rate adjustment part with the second pipe joint, simple in structure, are easy to realize.
Due to the first pipe joint is fixed on the exhaust duct of described DPF suction port end by the mode of welding, welding, as the common mode that is fixedly connected with, is easy to realize.
Due to the second pipe joint is fixed on the exhaust duct of described DPF air outlet end by the mode of welding, welding, as the common mode that is fixedly connected with, is easy to realize.
Due to the flange of Flow-rate adjustment part employing different inner diameters, realize the flow of the gas to the DPF that flows through by switching the flange of different inner diameters, simple to operate.
Due to the through hole sheet of Flow-rate adjustment part employing flange and the different inner diameters being mated, realize the flow of the gas to the DPF that flows through by switching the through hole sheet of different inner diameters, simple to operate, cost is lower.
Because Flow-rate adjustment part adopts pressure regulator valve, by adjust pressure regulator valve valve switching and open and close the size of degree and realize the flow of the gas to the DPF that flows through, simple to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the DPF crash simulation device that provides of the utility model embodiment one;
Fig. 2 is the structural representation of the DPF crash simulation device that provides of the utility model embodiment two;
Fig. 3 is the structural representation of the through hole sheet that provides of the utility model;
Fig. 4 is the structural representation of the DPF crash simulation device that provides of the utility model embodiment three;
Wherein, 1-DPF, 2-differential pressure pickup, 3-bypass tube, 31-the first pipe joint, 32-the second pipe joint, 4-Flow-rate adjustment part, 41-flange, 42-through hole sheet, 43-pressure regulator valve.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the structural representation of the DPF crash simulation device that the utility model provides, and for convenience of explanation, has only provided the part relevant to the utility model in figure.
DPF crash simulation device comprises the DPF1 being communicated with motor blowdown piping, described DPF1 two ends connect differential pressure pickup 2, this device also comprises the bypass tube 3 being arranged in parallel with described DPF1, described bypass tube 3 is communicated with described motor blowdown piping, on described bypass tube 3, Flow-rate adjustment part 4 is installed.
The present embodiment has been cancelled the mode of the original burning hole at DPF1 internal simulation, one bypass tube 3 in parallel with DPF1 is set on the exhaust duct at DPF1 two ends, Flow-rate adjustment part 4 is set on bypass tube 3, regulate by the gas flow of bypass tube 3 by Flow-rate adjustment part 4, thereby reach the gas flow that regulates the DPF1 that flows through, particularly:
If by adjust flux adjusting element 4, make bypass tube 3 obstructed, DPF1 will be all flow through in exhaust, and now corresponding state is DPF1 normal working, can be used for normal performance development test;
When regulating this Flow-rate adjustment part 4, make a part of exhaust stream to bypass tube 3, part particle is just discharged by bypass tube 3, the extraction flow of DPF1 of flowing through like this will reduce, the Particle Phase that DPF1 captures should reduce, and now the pressure reduction at DPF1 two ends diminishes, and it is large that the PM value that exhaust apparatus detects becomes;
Along with continuous adjust flux adjusting element 4, the exhaust that makes to flow through bypass tube 3 is more, and the particle that DPF1 captures is fewer, exhaust apparatus detect PM larger, this trend and the DPF1 inefficacy performance trend causing of punching is identical, can reach the effect identical with punching failure state by this device.
The utility model is realized the various scenes that analog D PF1 lost efficacy, the such as pressure difference of DPF1 two ends exhaust duct embodies the degree of DPF inefficacy etc., and this apparatus structure is simple, easy operating, and avoided the expendable defect of bringing because of burning hole, thereby reduce cost.
In the utility model, the two ends of bypass tube 3 need to be fixedly connected on the exhaust duct at DPF1 two ends, and be communicated with, neutral position also needs to arrange Flow-rate adjustment part 4, therefore, bypass tube 3 can be set to two joints, take Flow-rate adjustment part 4 as separation, bypass tube 3 is provided with to the first pipe joint 31 and the second pipe joint 32, wherein, one end of the first pipe joint 31 is fixedly connected on the exhaust duct of described DPF1 suction port end, the other end is connected with one end of described the second pipe joint 32 by described Flow-rate adjustment part 4, the other end of described the second pipe joint 32 is fixedly connected on the exhaust duct of described DPF1 air outlet end.
In this embodiment, the first pipe joint 31 is fixed on the exhaust duct of described DPF1 suction port end by the mode of welding, and this welding manner is as the means of fixation of common assembly, and technique is simple, easy operating, and be easy to keep the connectedness of exhaust duct and the first pipe joint 31.
In this embodiment, the second pipe joint 32 is fixed on the exhaust duct of DPF1 air outlet end by the mode of welding, and this welding manner is as the means of fixation of common assembly, and technique is simple, easy operating, and be easy to keep the connectedness of exhaust duct and the second pipe joint 32.
In the utility model, as shown in Figure 2, the flange 41 that Flow-rate adjustment part 4 is several different inner diameters of connecting with described the first pipe joint 31 and the second pipe joint 32, realize the control of the flow to DPF1 by the flange 41 of these different inner diameters, the flange 41 of different inner diameters specification is set, start test from maximum inner diameter (can setting identical with the internal diameter of bypass tube 3), constantly the flange 41 that internal diameter diminishes is loaded onto in dismounting, progressively simulate the degree of inefficacy DPF, to the flange 41 of minimum diameter, wherein, the internal diameter of the flange 41 of this minimum diameter can be 0.
Wherein, in embodiment shown in upper Fig. 2, described Flow-rate adjustment part 4 comprises the flange 41 connecting with described the first pipe joint 31 and the second pipe joint 32, described flange 41 disposes the through hole sheet 42 of several different inner diameters, as shown in Figure 3, in this embodiment, flange 41 is provided with one, its internal diameter fixed size, can be identical with the internal diameter of bypass tube 3, realize the adjusting to bypass tube 3 flows by several through hole sheets 42 that arrange, while needing large flow, switch the through hole sheet 42 of large diameter, progressively switch, realize the simulation to DPF1 failure degree, realize simple to operate, and 42 processing of through hole sheet are simple, cost is lower.
In the utility model, as shown in Figure 3, Flow-rate adjustment part 4 is the pressure regulator valve 43 connecting with described the first pipe joint 31 and the second pipe joint 32, its aperture by the valve of this pressure regulator valve 43 realizes the control to DPF1 air displacement, its concrete implementation procedure is described as above-described embodiment, does not repeat them here.
The bypass tube that the utility model is communicated with exhaust duct in the parallel connection of DPF two ends, carry out flow control by Flow-rate adjustment part, realize the control of the extraction flow to the DPF that flows through, reach the degree that analog D PF lost efficacy, it is simple in structure, easy to operate, avoid DPF body to cause unrepairable and permanent damage, reduce costs.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a DPF crash simulation device, described DPF crash simulation device comprises the DPF being communicated with motor blowdown piping, described DPF two ends connect differential pressure pickup, it is characterized in that, described device also comprises the bypass tube being arranged in parallel with described DPF, described bypass tube is communicated with described motor blowdown piping, and Flow-rate adjustment part is installed on described bypass tube.
2. DPF crash simulation device according to claim 1, it is characterized in that, described bypass tube is provided with the first pipe joint and the second pipe joint, one end of described the first pipe joint is fixedly connected on the exhaust duct of described DPF suction port end, the other end is connected with one end of described the second pipe joint by described Flow-rate adjustment part, and the other end of described the second pipe joint is fixedly connected on the exhaust duct of described DPF air outlet end.
3. DPF crash simulation device according to claim 2, is characterized in that, described the first pipe joint is fixed on the exhaust duct of described DPF suction port end by the mode of welding.
4. DPF crash simulation device according to claim 3, is characterized in that, described the second pipe joint is fixed on the exhaust duct of described DPF air outlet end by the mode of welding.
5. according to the DPF crash simulation device described in claim 2 to 4 any one, it is characterized in that, described Flow-rate adjustment part is the flange of several different inner diameters of connecting with described the first pipe joint and the second pipe joint.
6. according to the DPF crash simulation device described in claim 2 to 4 any one, it is characterized in that, described Flow-rate adjustment part comprises the flange connecting with described the first pipe joint and the second pipe joint, and described flange disposes the through hole sheet of several different inner diameters.
7. according to the DPF crash simulation device described in claim 2 to 4 any one, it is characterized in that, described Flow-rate adjustment part is the pressure regulator valve connecting with described the first pipe joint and the second pipe joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792920.2U CN203614173U (en) | 2013-12-04 | 2013-12-04 | DPF failure simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320792920.2U CN203614173U (en) | 2013-12-04 | 2013-12-04 | DPF failure simulation device |
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| CN203614173U true CN203614173U (en) | 2014-05-28 |
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| CN201320792920.2U Expired - Fee Related CN203614173U (en) | 2013-12-04 | 2013-12-04 | DPF failure simulation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762061A (en) * | 2016-12-07 | 2017-05-31 | 江苏大学 | The diagnostic device and method of a kind of simulation DPF failures |
| CN110849605A (en) * | 2019-11-18 | 2020-02-28 | 中国重汽集团济南动力有限公司 | Particle catcher fault simulation device, method for judging blocking fault degree and method for removing fault degree |
| US11131224B1 (en) * | 2020-04-21 | 2021-09-28 | Caterpillar Inc. | Exhaust system having pressure sensing system with plugging-mitigation conduit forming always-open leakage path |
-
2013
- 2013-12-04 CN CN201320792920.2U patent/CN203614173U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762061A (en) * | 2016-12-07 | 2017-05-31 | 江苏大学 | The diagnostic device and method of a kind of simulation DPF failures |
| CN106762061B (en) * | 2016-12-07 | 2020-03-31 | 江苏大学 | Diagnostic device and method for simulating DPF failure |
| CN110849605A (en) * | 2019-11-18 | 2020-02-28 | 中国重汽集团济南动力有限公司 | Particle catcher fault simulation device, method for judging blocking fault degree and method for removing fault degree |
| CN110849605B (en) * | 2019-11-18 | 2021-05-18 | 中国重汽集团济南动力有限公司 | Method for judging blocking fault degree and method for removing fault degree |
| US11131224B1 (en) * | 2020-04-21 | 2021-09-28 | Caterpillar Inc. | Exhaust system having pressure sensing system with plugging-mitigation conduit forming always-open leakage path |
| US20210324780A1 (en) * | 2020-04-21 | 2021-10-21 | Caterpillar Inc. | Exhaust system having pressure sensing system with plugging-mitigation conduit forming always-open leakage path |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20141204 |
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| EXPY | Termination of patent right or utility model |