CN115791911A - Binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in - Google Patents
Binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in Download PDFInfo
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- CN115791911A CN115791911A CN202211500409.0A CN202211500409A CN115791911A CN 115791911 A CN115791911 A CN 115791911A CN 202211500409 A CN202211500409 A CN 202211500409A CN 115791911 A CN115791911 A CN 115791911A
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- Prior art keywords
- nitrogen
- oxygen sensor
- ceramic core
- diesel vehicle
- tail gas
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- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000007789 gas Substances 0.000 title claims abstract description 32
- 238000012545 processing Methods 0.000 title claims description 5
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 239000000523 sample Substances 0.000 claims abstract description 28
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 18
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 4
- 230000009977 dual effect Effects 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 21
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 6
- 239000004202 carbamide Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a dual-channel nitrogen-oxygen sensor special for a national six-tail gas treatment system of a diesel vehicle, which comprises two ceramic core probes, wherein the probes internally comprise ceramic chips, two wire harnesses, connectors and a structural member shell, and a nitrogen-oxygen controller is arranged in the shell. Two ceramic core probes are respectively for installing the preceding NOX probe in SCR system inlet line entrance and installing the back NOX probe in exhaust duct exit, adopt above-mentioned structure after, its structural design is light ingenious, as long as install a sensor alright realize the closed loop detection around the tail gas treatment, satisfy six tail gas treatment system test standard in state, low in manufacturing cost has just saved installation space.
Description
Technical Field
The invention belongs to the technical field of nitrogen-oxygen sensor detection, and particularly relates to a dual-channel nitrogen-oxygen sensor special for a national six-tail gas treatment system of a diesel vehicle.
Background
The nitrogen-oxygen sensor is used for measuring the nitrogen-oxygen concentration in the tail gas of the engine so as to meet the requirements of closed-loop control of an engine aftertreatment system and the requirements of a vehicle-mounted OBD diagnosis system. Total 2 NOs in six post-treatment systems of diesel vehicle X The sensor adopts the scheme of two nitrogen oxide sensors of an inlet and an outlet, so that more accurate closed-loop control logic can be established, the conversion efficiency of the nitrogen oxides can be calculated in real time, the original emission of the nitrogen oxides of the engine can be controlled, and the fuel economy can be improved. NO installed at inlet of air inlet pipeline of SCR system X The sensor can detect NO in the original exhaust gas of the engine X Concentration and oxygen concentration, and transmitting corresponding signals to an ECU for calculating and controlling urea injection quantity and DPF regeneration; post NO installed at SCR system exhaust pipe outlet X The sensor is used for OBD monitoring, mainly for NO of exhaust gas X Concentration detection with pre-binding NO X The conversion efficiency is calculated by the sensor, the conversion efficiency of the six-vehicle type in China can reach more than 95%, and urea injection closed-loop control is realized.
However, the inventor believes that the diesel vehicle under the national six standards adopts two nitrogen oxygen sensor products, which not only increases the cost related to a plurality of SCR treatment boxes and increases the risk of product failure, but also is not in accordance with the light weight design. Therefore, a dual-channel nitrogen-oxygen sensor specially used for a diesel vehicle national six-tail gas treatment system needs to be provided.
It should be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus, may include information that does not constitute prior art.
Disclosure of Invention
The inventor finds that through research, two nitrogen oxygen sensors need to be installed in the aftertreatment system under the national six standards, so that the cost of the multiple SCR treatment box bodies is increased, the product failure risk is increased, and the technical problem is not in accordance with the light weight design.
In view of at least one of the above technical problems, the present disclosure provides a dual-channel nitrogen-oxygen sensor dedicated to a diesel vehicle national six-exhaust treatment system, and the specific technical scheme is as follows:
the utility model provides a binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in, including structure casing and pencil, be equipped with the PCBA controller in the structure casing, the PCBA controller, nitrogen oxygen sensor ceramic core data detection circuit before containing, back nitrogen oxygen sensor ceramic core data detection circuit, master control MCU circuit, power conversion circuit, CAN communication circuit, the structure casing has set sealed back lid, the upper surface middle part of structure casing is equipped with the connector, the connector connects with the PCBA controller and connects, the connector both sides are equipped with preceding pencil socket and back pencil socket relatively, preceding pencil socket is connected with preceding nitrogen oxygen sensor ceramic core data detection circuit communication, back pencil socket is connected with back nitrogen oxygen sensor ceramic core data detection circuit communication, preceding pencil socket passes through the pencil and connects preceding NO X The probe and the rear wire harness socket are connected with a rear NO through a wire harness X A probe.
In some embodiments of the present disclosure, the connector includes 4 terminals, which are a power source positive terminal, a power source negative terminal, a CAN bus high terminal, and a CAN bus low terminal, wherein the power source positive terminal and the power source negative terminal are electrically connected to the power conversion circuit, and the CAN bus high terminal and the CAN bus low terminal are in communication connection with the CAN communication circuit.
In some embodiments of the disclosure, the pre-NO X Probe and post NO X The probes are all ceramic core probes.
In some embodiments of the present disclosure, the ceramic core inside the ceramic core probe is a zirconia nitrogen oxide detection chip, which contains 8 chip pins, and the operating temperature of the zirconia nitrogen oxide detection chip is 800 ℃ ± 100 ℃.
In some embodiments of the present disclosure, there are 8 pins 0.75mm for the butt chip pins in the wire harness 2 And line width data lines.
In some embodiments of the present disclosure, the rear harness receptacle is configured to route a harness that is 1 meter longer than the harness routed by the front harness receptacle.
In some embodiments of the present disclosure, an insulating thermal pad is disposed between the PCBA controller and an inner wall of the structural component housing.
Compared with the prior art, the invention has the following beneficial effects:
the disclosure is by pre-NO X Probe for detecting NO in engine exhaust X Concentration and oxygen concentration, and transmitting corresponding signals to an ECU for calculating and controlling urea injection quantity and DPF regeneration; post NO X The probe is used for OBD monitoring and mainly carries out NO on the exhaust gas X Concentration detection satisfies six requirements of the state, and two integrated settings of preceding and back nitrogen oxygen sensor through a PCBA controller, as long as install a sensor alright realize the closed loop detection around the tail gas treatment, satisfy six tail gas treatment system test standard of the state, low in manufacturing cost just has saved installation space, reduces the cost.
Drawings
FIG. 1 is a front view from the perspective of example 1 of the structure of the present invention;
FIG. 2 is a bottom view of example 1 in the configuration of the present invention;
FIG. 3 is a top view of example 1 in a structure according to the present invention;
fig. 4 is an exploded view from perspective two of example 1 in the structure of the present invention.
The reference numbers in the figures illustrate: 1. a structural member housing; 11. sealing the rear cover; 2. a wire harness; 3. a PCBA controller; 4. a connector assembly; 5. a front harness receptacle; 6. a rear harness receptacle; 7. pro NO X A probe; 8. post NO X A probe.
The specific implementation mode is as follows:
for better understanding of the purpose, structure and function of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The numbering of the components as such is used herein only to distinguish between the objects represented and not to have any sequential or technical meaning. In the present disclosure, the term "connected", unless otherwise specified, includes both direct and indirect "connections". In the description of the present application, it is to be understood that the positional or orientational relationships indicated by the directional terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are based on the positional or orientational relationships shown in the drawings and are for convenience of description of the present application and brief description, but do not indicate or imply that the device or unit referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present application.
As shown in the attached drawings of figures 1 to 4, a double-channel nitrogen-oxygen sensor special for a diesel vehicle six-state tail gas treatment system is designed, and comprises a structural part shell 1 and a wiring harness 2, wherein a PCBA controller 3 is arranged in the structural part shell 1, the PCBA controller 3 comprises a front nitrogen-oxygen sensor ceramic core data detection circuit and a rear nitrogen-oxygen sensor ceramic core data detection circuit, a main control MCU circuit, a power supply conversion circuit and a CAN communication circuit, the structural part shell 1 is provided with a sealed rear cover 11, a connector 4 is arranged in the middle of the upper surface of the structural part shell 1, the connector 4 is connected with the PCBA controller 3 in a matching mode, a front wiring harness socket 5 and a rear wiring harness socket 6 are oppositely arranged on two sides of the connector 4, the front wiring harness socket 5 is in communication connection with the front nitrogen-oxygen sensor ceramic core data detection circuit, the rear wiring harness socket 6 is in communication connection with the rear nitrogen-oxygen sensor ceramic core data detection circuit, and the front wiring harness socket 5 is connected with the front NO 2 through the wiring harness 2 X The probe 7 and the rear harness socket 6 are connected with a rear NO through the harness 2 X Probe 8, pre-NO through the present disclosure X The probe 7 is used for detecting NO in the original exhaust gas of the engine X Concentration and oxygen concentration, and transmitting corresponding signals to an ECU for calculating and controlling urea injection quantity and DPF regeneration; post NO X Probe 8 is used for OBD monitoring, mainly for NO of exhaust gas X Concentration detection satisfies six requirements of the state, and with two integrated settings of preceding back and forth nitrogen oxygen sensor, through a PCBA controller 3, as long as install a sensor alright realize the closed loop detection before and after the tail gas treatment, satisfy six tail gas treatment system test standard of the state, low in manufacturing cost just has saved installation space, reduces the cost.
In use, the two NO' s X The probe head is provided with a probe head,respectively arranged at the inlet of the air inlet pipeline of the SCR system and is NO X Probe 7 and outlet of exhaust pipe of SCR system as back NO X Probe, front and rear NO X The middle of the installation position of the probe is provided with an SCR treatment box body. Pro NO X Probe 7 for detecting NO in engine raw exhaust gas X Concentration and oxygen concentration, and transmitting corresponding signals to an ECU for calculating and controlling urea injection quantity and DPF regeneration; post NO X Probe 8 is used for OBD monitoring, mainly for NO of exhaust gas X And the concentration detection is carried out, so that closed-loop control is met. The probe comprises a hexagonal screw, and the threads are coated with sealant, so that the probe is convenient to install on the exhaust pipe.
In the above embodiment, 1 example is listed to realize the above technical solution:
example 1
The embodiment discloses a binary channels nitrogen oxygen sensor of six tail gas processing systems in diesel vehicle country is exclusively used in, including structure casing 1 and pencil 2, be equipped with PCBA controller 3 in the structure casing 1, PCBA controller 3 contains preceding nitrogen oxygen sensor ceramic core data detection circuitry, back nitrogen oxygen sensor ceramic core data detection circuitry, the main control MCU circuit, power conversion circuit, CAN communication circuit, structure casing 1 sets sealed back lid 11, the upper surface middle part of structure casing 1 is equipped with connector 4, connector 4 connects with PCBA controller 3 and connects, connector 4 both sides are equipped with preceding pencil socket 5 and back pencil socket 6 relatively, preceding pencil socket 5 is connected with preceding nitrogen oxygen sensor ceramic core data detection circuitry communication, back pencil socket 6 is connected with back nitrogen oxygen sensor ceramic core data detection circuitry communication, preceding pencil socket 5 is connected through pencil 2 preceding NO X The probe 7 and the rear harness socket 6 are connected with a rear NO through the harness 2 X Probe 8, pre-NO through the present disclosure X The probe 7 is used for detecting NO in the original exhaust gas of the engine X Concentration and oxygen concentration, and transmitting corresponding signals to an ECU for calculating and controlling urea injection quantity and DPF regeneration; post NO X Probe 8 is used for OBD monitoring, mainly for NO of exhaust gas X Concentration detection, satisfies six requirements of the state, with two integrated settings of preceding and back nitrogen oxygen sensor, through a PCBA controller 3, as long as install a sensor alright realize the tailClosed loop detection before and after gas treatment meets the test standard of the national six-tail gas treatment system, the manufacturing cost is low, the installation space is saved, and the cost is reduced.
The socket connector 4 comprises 4 terminals which are a power supply positive terminal, a power supply negative terminal, a CAN bus high terminal and a CAN bus low terminal, wherein the power supply positive terminal and the power supply negative terminal are electrically connected with the power supply conversion circuit, and the CAN bus high terminal and the CAN bus low terminal are in communication connection with the CAN communication circuit; the ceramic core in the ceramic core probe is a zirconia nitrogen oxide detection chip and comprises 8 chip pins, and the working temperature of the zirconia nitrogen oxide detection chip is 800 +/-100 ℃;8 0.75mm pins for butting the chip pins are arranged in the wire harness 2 2 A line width data line; the wire harness 2 arranged on the rear wire harness socket 6 is longer than the wire harness 2 arranged on the front wire harness socket 5 by 1 meter, in the embodiment, the length of the wire harness 2 arranged on the rear wire harness socket 6 is 2 meters, and the length of the wire harness 2 arranged on the front wire harness socket 5 is 1 meter; an insulating heat conducting pad is arranged between the PCBA controller 3 and the inner wall of the structural component shell 1.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. The utility model provides a be exclusively used in two-channel nitrogen oxygen sensor of six tail gas processing system of diesel vehicle state which characterized in that: the structure comprises a structure shell (1) and a wire harness (2), wherein a PCBA controller (3) is arranged in the structure shell (1), the PCBA controller (3) comprises a front nitrogen-oxygen sensor ceramic core data detection circuit, a rear nitrogen-oxygen sensor ceramic core data detection circuit, a main control MCU circuit, a power conversion circuit and a CAN communication circuit, the structure shell (1) is provided with a sealed rear cover (11), and the structure shell (2)1) The middle part of the upper surface of the shell is provided with a connector (4), the connector (4) is connected with a PCBA controller (3) in a matching mode, two sides of the connector (4) are provided with a front wiring harness socket (5) and a rear wiring harness socket (6) relatively, the front wiring harness socket (5) is in communication connection with a front nitrogen-oxygen sensor ceramic core data detection circuit, the rear wiring harness socket (6) is in communication connection with a rear nitrogen-oxygen sensor ceramic core data detection circuit, and the front wiring harness socket (5) is connected with a front NO through a wiring harness (2) X The probe (7) and the rear harness socket (6) are connected with a rear NO through the harness (2) X A probe (8).
2. The dual-channel nitrogen-oxygen sensor special for the national six-tail gas treatment system of the diesel vehicle as claimed in claim 1, wherein the connector (4) comprises 4 terminals, namely a power supply positive terminal, a power supply negative terminal, a CAN bus high terminal and a CAN bus low terminal, wherein the power supply positive terminal, the power supply negative terminal and the power supply conversion circuit are electrically connected, and the CAN bus high terminal and the CAN bus low terminal are in communication connection with the CAN communication circuit.
3. The dual channel NOx sensor dedicated to diesel vehicle national six exhaust gas treatment system of claim 1, wherein the pre-NO is X Probe (7) and post NO X The probes (8) are all ceramic core probes.
4. The two-channel NOx sensor special for the six exhaust gas treatment systems of diesel vehicle nation of claim 3, characterized in that, the ceramic core inside the ceramic core probe is the zirconia chip that detects nitrogen and oxygen, contains 8 chip pins, and the operating temperature of the zirconia chip that detects nitrogen and oxygen is 800 ℃ ± 100 ℃.
5. The dual-channel nitrogen-oxygen sensor special for diesel vehicle national six-tail gas treatment system according to claim 4, wherein 8 pins of 0.75mm for butting chip pins are arranged in the wire harness (2) 2 And line width data lines.
6. The dual channel NOx sensor dedicated to the diesel vehicle national six exhaust gas treatment system according to claim 1, wherein the harness (2) associated with the rear harness socket (6) is 1 meter longer than the harness (2) associated with the front harness socket (5).
7. The dual-channel nitrogen-oxygen sensor special for the diesel vehicle national six-exhaust treatment system according to claim 1, wherein an insulating heat conducting pad is arranged between the PCBA controller (3) and the inner wall of the structural component shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211500409.0A CN115791911A (en) | 2022-11-28 | 2022-11-28 | Binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211500409.0A CN115791911A (en) | 2022-11-28 | 2022-11-28 | Binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115791911A true CN115791911A (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211500409.0A Pending CN115791911A (en) | 2022-11-28 | 2022-11-28 | Binary channels nitrogen oxygen sensor of six tail gas processing system in diesel vehicle state is exclusively used in |
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| CN (1) | CN115791911A (en) |
Citations (8)
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|---|---|---|---|---|
| CN102155276A (en) * | 2011-01-26 | 2011-08-17 | 烟台华龙商用机器有限公司 | Tail gas emission purification system of diesel engine |
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2022
- 2022-11-28 CN CN202211500409.0A patent/CN115791911A/en active Pending
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