CN210068281U - Arrangement structure of NOx sensor - Google Patents
Arrangement structure of NOx sensor Download PDFInfo
- Publication number
- CN210068281U CN210068281U CN201920684796.5U CN201920684796U CN210068281U CN 210068281 U CN210068281 U CN 210068281U CN 201920684796 U CN201920684796 U CN 201920684796U CN 210068281 U CN210068281 U CN 210068281U
- Authority
- CN
- China
- Prior art keywords
- nox sensor
- ahi
- nozzle holder
- ahi nozzle
- mount pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model provides a NOx sensor's arrangement structure, includes turbo charger and NOx sensor, turbo charger is connected with the blast pipe, be provided with the AHI nozzle holder on the blast pipe, the position that lies in on the blast pipe between turbo charger and the AHI nozzle holder is provided with the NOx sensor mount pad, the NOx sensor mount pad is close to the AHI nozzle holder and arranges, and NOx sensor mount pad arranges side by side with the AHI nozzle holder, in the NOx sensor passes through the NOx sensor mount pad and installs the blast pipe, the NOx sensor mount pad is arranged at the coplanar with the AHI nozzle holder, NOx sensor mount pad, AHI nozzle holder, blast pipe integrated into one piece. The design not only solves the problem that the NOx sensor is polluted by fuel oil or damaged by high temperature, but also has simple manufacture.
Description
Technical Field
The utility model relates to an engine exhaust purifies technical field, especially relates to a layout structure of NOx sensor, is mainly applicable to and solves the problem that the NOx sensor received the fuel to pollute or receive high temperature and damage.
Background
In order to ensure that the exhaust emission of the engine meets the sixth-stage emission regulation of the state, the aftertreatment system is designed to be DOC + DPF + SCR + ASC, urea injection amount needs to be accurately controlled in order to accurately control the NOx emission of the exhaust, and the original engine emission of the engine needs to be accurately measured in order to accurately control the urea injection amount, and a front NOx sensor is generally installed for measuring the original engine NOx emission. When six engines in the state develop, all can install preceding NOx sensor, the mounted position mainly is in three places: (1) at the DOC inlet; (2) the DPF outlet; (3) at the turbocharger outlet.
The prior art has the following defects: (1) the front NOx sensor is arranged at the DOC inlet and can damage the NOx sensor, and many national six aftertreatment systems are provided with aftertreatment fuel injection systems (AHI) which are used for injecting fuel into an exhaust pipe, improving the exhaust temperature and realizing the active regeneration of the DPF; (2) if the NOx sensor is arranged at the outlet of the DPF, the DOC and the DPF can directly change the oxygen concentration, and the measured oxygen concentration is no longer the oxygen concentration in the exhaust gas; (3) the front NOx sensor is installed at the turbocharger outlet and may burn out the NOx sensor.
Disclosure of Invention
The utility model aims at overcoming the defect and the problem that the NOx sensor that exists among the prior art received fuel pollution or received high temperature and damaged, providing one kind and had both avoided the NOx sensor to receive fuel pollution and damaged, had avoided the NOx sensor to receive high temperature and the NOx sensor's that damages arrangement structure again.
In order to achieve the above purpose, the technical solution of the utility model is that: an arrangement structure of a NOx sensor comprises a turbocharger and the NOx sensor, wherein an exhaust pipe is connected with the turbocharger;
be provided with AHI nozzle holder on the blast pipe, the position that is located between turbo charger and the AHI nozzle holder on the blast pipe is provided with NOx sensor mount pad, NOx sensor mount pad is close to the AHI nozzle holder and arranges, and NOx sensor mount pad arranges with the AHI nozzle holder side by side, the NOx sensor passes through NOx sensor mount pad and installs in the blast pipe.
The NOx sensor mount and the AHI nozzle holder are arranged on the same plane.
The NOx sensor mounting seat, the AHI nozzle seat and the exhaust pipe are integrally formed.
The AHI nozzle seat is of an oval structure, an AHI nozzle mounting hole is formed in the center of the AHI nozzle seat, the NOx sensor mounting seat is of a cylindrical structure, the outer wall of the NOx sensor mounting seat is connected with a protruding portion on one side of the long axis of the AHI nozzle seat into a whole, and the NOx sensor mounting hole is formed in the center of the NOx sensor mounting seat.
And the wiring harness of the NOx sensor is fixed on an AHI oil delivery pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to an arrangement structure of NOx sensor, wherein an AHI nozzle seat is arranged on an exhaust pipe, a NOx sensor mounting seat is arranged on the exhaust pipe between a turbocharger and the AHI nozzle seat, the NOx sensor mounting seat is arranged close to the AHI nozzle seat, the NOx sensor mounting seat and the AHI nozzle seat are arranged side by side, and a NOx sensor is arranged in the exhaust pipe through the NOx sensor mounting seat; in the design, the NOx sensor mounting seat is arranged in front of the AHI nozzle seat, so that the damage of the NOx sensor due to fuel pollution can be avoided; the NOx sensor mounting seat is arranged close to the AHI nozzle seat, so that the NOx sensor can be prevented from being damaged by high temperature. Therefore, the utility model discloses both can avoid the NOx sensor to receive the fuel pollution and damage, can avoid the NOx sensor to receive high temperature and damage again.
2. The NOx sensor mounting seat and the AHI nozzle seat in the arrangement structure of the NOx sensor are arranged on the same plane, so that the processing difficulty of the exhaust pipe is reduced; NOx sensor mount pad, AHI nozzle holder, blast pipe integrated into one piece, AHI nozzle holder is oval structure, AHI nozzle mounting hole has been seted up at the center of AHI nozzle holder, NOx sensor mount pad is cylindrical structure, the outer wall of NOx sensor mount pad links into an integrated entity with the bellying of AHI nozzle holder's major axis one side, NOx sensor mounting hole has been seted up at the center of NOx sensor mount pad, the above-mentioned design has reduced the processing degree of difficulty of blast pipe, NOx sensor mount pad, AHI nozzle holder. Therefore, the utility model is simple to manufacture.
3. The utility model relates to a pencil of NOx sensor is fixed on the defeated oil pipe of AHI among the arrangement structure of NOx sensor, can avoid the pencil whipping. Therefore, the utility model discloses can avoid NOx sensor's pencil whipping.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the structure of the NOx sensor.
Fig. 3 is a temperature measurement test result of the NOx sensor harness.
Fig. 4 is a result of a temperature measurement test of the hex bolt of the NOx sensor.
In the figure: turbocharger 1, NOx sensor 2, harness 21, hex bolt 22, pillar 23, grommet 24, harness protective sleeve 25, SCU26, exhaust pipe 3, AHI nozzle mount 31, NOx sensor mount 32, AHI nozzle mount hole 33, boss 34, NOx sensor mount hole 35.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 and 2, an arrangement structure of a NOx sensor includes a turbocharger 1 and a NOx sensor 2, wherein an exhaust pipe 3 is connected to the turbocharger 1;
be provided with AHI nozzle holder 31 on the exhaust pipe 3, the position that lies in between turbo charger 1 and AHI nozzle holder 31 on the exhaust pipe 3 is provided with NOx sensor mount pad 32, NOx sensor mount pad 32 is close to AHI nozzle holder 31 and arranges, and NOx sensor mount pad 32 arranges with AHI nozzle holder 31 side by side, NOx sensor 2 passes through NOx sensor mount pad 32 and installs in exhaust pipe 3.
The NOx sensor mount 32 is arranged on the same plane as the AHI nozzle holder 31.
The NOx sensor mount 32, the AHI nozzle holder 31, and the exhaust pipe 3 are integrally formed.
The wiring harness 21 of the NOx sensor 2 is fixed to the AHI oil pipe.
The principle of the utility model is explained as follows:
the design relates to a layout scheme of NOx sensors, in particular to a layout scheme of NOx sensors for measuring NOx emission of an original machine, which not only avoids the damage of the NOx sensors due to fuel oil pollution, but also avoids the damage of the NOx sensors due to high temperature, and reduces the processing difficulty of an exhaust pipe. The NOx sensor needs to be installed in front of the AHI to avoid damage of fuel to the NOx sensor, the distance from the AHI to the DOC needs to be long enough to guarantee HC uniformity, exhaust pipes of the national six-engine are short and are about one meter in order to control exhaust temperature drop, and therefore the position of the N0x sensor needs to be accurately designed to avoid damage of the NOx sensor due to high temperature. The temperature resistance requirements of the components of the NOx sensor are as follows:
| position of | Operating temperature | Maximum tolerable temperature (40 h at most) |
| Exhaust temperature | ≤850℃ | ≤950℃ |
| Hexagon bolt | ≤500℃ | ≤630℃ |
| Support post | ≤260℃ | ≤320℃ |
| Grommet | ≤250℃ | ≤280℃ |
| Wire harness | ≤230℃ | ≤260℃ |
| Wire harness protective sleeve | ≤210℃ | ≤240℃ |
| SCU | -40--125℃ |
Referring to fig. 1 and 2, engine exhaust gas from the turbocharger 1 flows in the exhaust pipe 3; the NOx sensor mounting seat 32 and the AHI nozzle seat 31 are arranged side by side, the NOx sensor 2 is mounted in the exhaust pipe 3 through the NOx sensor mounting seat 32, the AHI nozzle is mounted in the exhaust pipe 3 through the AHI nozzle seat 31, and when exhaust flows in the exhaust pipe 3, the exhaust firstly passes through the NOx sensor 2 and then passes through the AHI nozzle; the AHI nozzle is connected to the low-pressure oil way through an AHI oil conveying pipe, and the surface temperature of the AHI oil conveying pipe is lower than 100 ℃; the wiring harness 21 of the NOx sensor 2 is fixed on the AHI oil conveying pipe, so that the wiring harness is prevented from shaking; when the AHI nozzle does not spray oil, the normal work of the NOx sensor 2 is not affected; when the AHI nozzle injects oil, the fuel oil can be directly blown to the downstream under the action of the exhaust gas flow, and cannot be accumulated on the NOx sensor 2, so that the NOx sensor 2 cannot be damaged; the NOx sensor 2 and the mounting seat of the AHI nozzle are arranged on the same plane, so that the processing difficulty of the exhaust pipe 3 is reduced; the NOx sensor 2 and the mounting seat of the AHI nozzle are arranged together, the distance between the NOx sensor 2 and the turbocharger 1 can be lengthened, and the distance between the NOx sensor 2 and the outlet of the turbocharger 1 is 60 mm.
Thermocouples are arranged on the NOx sensor hexagon bolt 22, the NOx sensor wiring harness 21, the AHI nozzle seat 31, the AHI nozzle and the AHI oil conveying pipe for temperature measurement tests, and the temperature of each component of the NOx sensor 2 meets the requirement and the NOx sensor 2 cannot be damaged, wherein the temperature measurement test results of the NOx sensor wiring harness 21 and the NOx sensor hexagon bolt 22 refer to fig. 3 and 4.
Example 1:
referring to fig. 1 and 2, an arrangement structure of a NOx sensor includes a turbocharger 1 and a NOx sensor 2, the turbocharger 1 is connected with an exhaust pipe 3, the exhaust pipe 3 is provided with an AHI nozzle holder 31, a NOx sensor mounting seat 32 is provided on the exhaust pipe 3 at a position between the turbocharger 1 and the AHI nozzle holder 31, the NOx sensor mounting seat 32 is arranged close to the AHI nozzle holder 31, the NOx sensor mounting seat 32 and the AHI nozzle holder 31 are arranged side by side, and the NOx sensor 2 is installed in the exhaust pipe 3 through the NOx sensor mounting seat 32.
Example 2:
the basic contents are the same as example 1, except that:
referring to fig. 1, the NOx sensor mount 32 is arranged on the same plane as the AHI nozzle holder 31; the NOx sensor mounting seat 32, the AHI nozzle seat 31 and the exhaust pipe 3 are integrally formed; AHI nozzle holder 31 is oval structure, and AHI nozzle mounting hole 33 has been seted up at the center of AHI nozzle holder 31, NOx sensor mount 32 is cylindrical structure, and the outer wall of NOx sensor mount 32 links into an integrated entity with bellying 34 of the major axis one side of AHI nozzle holder 31, and NOx sensor mounting hole 35 has been seted up at the center of NOx sensor mount 32.
Example 3:
the basic contents are the same as example 1, except that:
referring to fig. 2, the wiring harness 21 of the NOx sensor 2 is fixed to the AHI oil delivery pipe.
Claims (5)
1. An arrangement structure of a NOx sensor, comprising a turbocharger (1) and a NOx sensor (2), the turbocharger (1) being connected with an exhaust pipe (3), characterized in that:
be provided with AHI nozzle holder (31) on blast pipe (3), the position that lies in between turbo charger (1) and AHI nozzle holder (31) on blast pipe (3) is provided with NOx sensor mount pad (32), NOx sensor mount pad (32) are close to AHI nozzle holder (31) and arrange, and NOx sensor mount pad (32) and AHI nozzle holder (31) arrange side by side, install in blast pipe (3) NOx sensor (2) through NOx sensor mount pad (32).
2. The arrangement of NOx sensors according to claim 1, characterized in that: the NOx sensor mount (32) and the AHI nozzle holder (31) are arranged on the same plane.
3. The arrangement of a NOx sensor according to claim 1 or 2, characterized in that: the NOx sensor mounting seat (32), the AHI nozzle seat (31) and the exhaust pipe (3) are integrally formed.
4. An arrangement of NOx sensors according to claim 3, characterized in that: AHI nozzle holder (31) is the ellipse circular structure, and AHI nozzle mounting hole (33) have been seted up to the center of AHI nozzle holder (31), NOx sensor mount pad (32) are cylindrical structure, and the bellying (34) of the outer wall of NOx sensor mount pad (32) and the major axis one side of AHI nozzle holder (31) link into an integrated entity, and NOx sensor mounting hole (35) have been seted up to the center of NOx sensor mount pad (32).
5. The arrangement of NOx sensors according to claim 1, characterized in that: and a wiring harness (21) of the NOx sensor (2) is fixed on an AHI oil delivery pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920684796.5U CN210068281U (en) | 2019-05-14 | 2019-05-14 | Arrangement structure of NOx sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920684796.5U CN210068281U (en) | 2019-05-14 | 2019-05-14 | Arrangement structure of NOx sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210068281U true CN210068281U (en) | 2020-02-14 |
Family
ID=69451943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920684796.5U Active CN210068281U (en) | 2019-05-14 | 2019-05-14 | Arrangement structure of NOx sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210068281U (en) |
-
2019
- 2019-05-14 CN CN201920684796.5U patent/CN210068281U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101988422B (en) | Method and system for verifying the operation of an SCR catalyst | |
| US8438839B2 (en) | Exhaust gas stream vortex breaker | |
| CN205559030U (en) | A modularization subassembly for exhausting after treatment system | |
| US20110088375A1 (en) | Exhaust purification apparatus for internal combustion engine | |
| US20130118148A1 (en) | Advanced exhaust-gas sampler for exhaust sensor | |
| US8652410B2 (en) | Control method and arrangement for selective catalytic reduction | |
| JP2009510324A (en) | Exhaust aftertreatment system diagnostic method | |
| CN106679982A (en) | Test bed device based on diesel engine after-treatment system performance test of combustor | |
| EP2981346B1 (en) | Nox measuring system and method | |
| CN105569789A (en) | Method and device for detecting blocking of SCR box of engine | |
| CN110578591B (en) | Assembly integrated harness device for engine aftertreatment | |
| US20090092525A1 (en) | Exhaust gas cleaning apparatus with improved configuration ensuring proper injection of reducing agent | |
| US20140305198A1 (en) | Selective Catalytic Reduction Outlet Mixing Device | |
| CN105051343A (en) | Modular exhaust treatment system | |
| WO2021057444A1 (en) | Method for quickly calibrating scr ammonia ratio factor of diesel engine | |
| CN111336023A (en) | Fuel content detection based on measurements from sensors and model estimation of measurements | |
| US20220025802A1 (en) | Nox sensor diagnostics in heavy-duty motor vehicle engines | |
| KR102342937B1 (en) | Method for operating diesel engine and diesel engine with inspection function of NH3 concentration | |
| CN210068281U (en) | Arrangement structure of NOx sensor | |
| CN113202605B (en) | Method for calculating ammonia leakage amount of SCR (Selective catalytic reduction) aftertreatment system | |
| EP3559423B1 (en) | Flow hood assembly | |
| CN114635776B (en) | Precision correction control method and system for SCR downstream NOx sensor | |
| CN106855463A (en) | Diesel engine post-processing system Accelarated aging test bench frame apparatus based on burner | |
| CN206638424U (en) | Diesel engine post-processing system testing stand for performance test device based on burner | |
| CN109948265B (en) | Simulation-based NOx sensor position rationality evaluation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |