CN106593604B - HC injection device for diesel vehicle - Google Patents
HC injection device for diesel vehicle Download PDFInfo
- Publication number
- CN106593604B CN106593604B CN201611214553.2A CN201611214553A CN106593604B CN 106593604 B CN106593604 B CN 106593604B CN 201611214553 A CN201611214553 A CN 201611214553A CN 106593604 B CN106593604 B CN 106593604B
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- Prior art keywords
- fuel oil
- pressure sensor
- valve
- oil channel
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/36—Arrangements for supply of additional fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/08—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a pressure sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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- 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
Abstract
The invention discloses a diesel vehicle HC injection device, which comprises: the metering module is provided with an oil inlet joint and an oil outlet joint, a fuel passage, a switching electromagnetic valve, a metering valve, an oil inlet pressure sensor and an oil outlet pressure sensor are arranged in the metering module, and the metering valve, the oil inlet pressure sensor, the switching electromagnetic valve and the oil outlet pressure sensor are sequentially connected in series in the fuel passage from the end of the oil inlet joint; the injection module is arranged on an exhaust pipe of the diesel engine, a nozzle head in the injection module injects diesel into the exhaust pipe, and a nozzle body in the injection module is connected with an oil outlet joint in the metering module through an oil pipe. The HC injection device of the present invention employs an electronically controlled and high-speed responsive solenoid valve. The spraying device has the advantages of good atomization performance, accurate control of spraying amount, simple structure, convenience in assembly and low processing difficulty.
Description
Technical Field
The invention belongs to the technical field of exhaust gas purification systems of internal combustion engines, and particularly relates to a diesel vehicle HC injection device capable of electronically and accurately controlling injection quantity.
Background
With the stricter emission regulations, the limit of the exhaust pollutants in the emission regulations of the states V and VI is greatly reduced compared with the limit of the exhaust pollutants (mainly particles and nitrogen oxides) in the emission regulations of the states IV. Diesel vehicles begin to use a DPF (particulate trap) to control the emission of soot particulates at the stage of country vi, but the soot particulates are deposited in the DPF, and an HC injection system is required to ignite the emitted particulates, so that the HC injection device becomes one of strategies meeting the emission regulations of country v and country vi, can effectively reduce the content of the soot particulates in exhaust pollutants, and enables the exhaust pollutants of an engine to meet the emission regulations of country v and country vi.
Diesel oil is sprayed into an exhaust pipe through a spraying device, the diesel oil is sprayed into the front end of a DOC catalyst in a timing and quantitative mode according to the requirement of active regeneration of a Diesel Particulate Filter (DPF), the diesel oil is fully mixed with exhaust gas, the exhaust temperature is improved under the action of the DOC, and carbon smoke particles deposited in the DPF are oxidized.
Disclosure of Invention
The invention aims to provide an HC injection device of a diesel vehicle, which is arranged on an exhaust pipeline, and according to the requirement of active regeneration of a Diesel Particulate Filter (DPF), diesel oil is injected into the front end of a DOC catalyst in a timed and quantitative manner, is fully mixed with exhaust gas, and then the exhaust temperature is increased under the action of the DOC so as to oxidize carbon smoke particulates deposited in the DPF; the injection device comprises a metering module and an injection module, wherein the metering module stabilizes the pressure of diesel oil, accurately meters the diesel oil and supplies the diesel oil to the injection module; the injection module is opened under a certain pressure to atomize the fuel into the exhaust line.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a diesel vehicle HC injection device includes:
the metering module is provided with an oil inlet joint and an oil outlet joint, a fuel oil channel, a switching electromagnetic valve, a metering valve, an oil inlet pressure sensor and an oil outlet pressure sensor are arranged in the metering module, and the metering valve, the oil inlet pressure sensor, the switching electromagnetic valve and the oil outlet pressure sensor are sequentially connected in series in the fuel oil channel from the end of the oil inlet joint;
the injection module is arranged on an exhaust pipe of the diesel engine, a nozzle head in the injection module injects diesel into the exhaust pipe, and a nozzle body in the injection module is connected with an oil outlet joint in the metering module through an oil pipe.
In a preferred embodiment of the present invention, the metering module further includes an upper metering valve support and a lower metering valve support, the upper metering valve support is equipped with the oil inlet joint, the oil outlet joint and the oil outlet pressure sensor, the upper metering valve support is internally provided with a first fuel oil channel and a second fuel oil channel, the oil inlet joint and the oil outlet joint are respectively communicated with the first fuel oil channel and the second fuel oil channel, and the oil outlet pressure sensor is communicated with the second fuel oil channel; the metering valve lower support is provided with an oil inlet pressure sensor, a third fuel oil channel, a fourth fuel oil channel and a pressure cavity are arranged in the metering valve lower support, the pressure cavity is communicated with the third fuel oil channel and the fourth fuel oil channel, and the oil inlet pressure sensor is communicated with the pressure cavity; the upper metering valve support and the lower metering valve support are connected through a fastening piece, one end of the switch electromagnetic valve is connected with the first fuel oil channel, the other end of the switch electromagnetic valve is communicated with the third fuel oil channel, one end of the metering valve is connected with the fourth fuel oil channel, the other end of the metering valve is connected with the second fuel oil channel, the first fuel oil channel, the third fuel oil channel, the pressure cavity, the fourth fuel oil channel and the second fuel oil channel form the fuel oil channels, the oil inlet pressure sensor and the oil outlet pressure sensor are in signal connection with the electronic control unit driving module, and the switch electromagnetic valve and the metering valve are in control connection with the electronic control unit driving module.
In a preferred embodiment of the present invention, the injection module further comprises a steel ball, a spring, an adjusting cushion block, a valve core and a flange, the flange is welded on the pipe wall of the exhaust pipe, the nozzle body is fixed on the flange, the nozzle head is connected with the lower end of the nozzle body, and the steel ball, the spring, the adjusting cushion block and the valve core are arranged in the inner cavities of the nozzle body and the nozzle head, wherein the steel ball is positioned between the upper end of the spring and the upper conical surface in the inner cavity of the nozzle body, the steel ball is contacted with the upper conical surface in the inner cavity of the nozzle body under the pre-pressure of the spring, the adjusting shim is positioned between the upper end surface of the valve core and the lower plane in the inner cavity of the nozzle body, the opening pressure of the injection module can be adjusted through the adjusting gasket, the lower end of the spring is propped against the upper end face of the valve core, and the upper plane of the valve core is contacted with the lower plane of the adjusting gasket; the lower head surface of the valve core is circumferentially and uniformly distributed with a plurality of chutes, so that diesel oil can pass through the chutes conveniently, and the center of the bottom of the nozzle head is provided with an oil injection hole.
The HC injection device of the present invention employs an electronically controlled and high-speed responsive solenoid valve. The spraying device has the advantages of good atomization performance, accurate control of spraying amount, simple structure, convenience in assembly and low processing difficulty.
Drawings
FIG. 1 is a schematic view showing the structure of an HC injection device assembly of the present invention.
FIG. 2 is a schematic diagram of an HC dosing module according to the present invention.
FIG. 3 is a schematic diagram of the HC injection module of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples, without thereby restricting the invention to the described examples.
Referring to fig. 1, the diesel HC injection device includes a dosing module 100 and an injection module 200, which is directly mounted on an exhaust pipe 300.
Referring to fig. 2, the metering module 100 includes an oil inlet joint 110, a metering valve upper bracket 120, an on-off solenoid valve 130, a metering valve lower bracket 140, a pressure sensor 150, a metering valve 170, a pressure sensor 180, and an oil outlet joint 190.
The metering valve upper support 120 is provided with an oil inlet joint 110, an oil outlet joint 190 and an oil outlet pressure sensor 180, a first fuel passage 121 and a second fuel passage 122 are arranged in the metering valve upper support 120, the oil inlet joint 110 and the oil outlet joint 120 are respectively communicated with the first fuel passage 121 and the second fuel passage 122, and the oil outlet pressure sensor 180 is communicated with the second fuel passage 122.
A feed pressure sensor 150 is fitted to the metering valve lower bracket 140, and a third fuel passage 141, a fourth fuel passage 142, and a pressure chamber 160 are provided in the metering valve lower bracket 140, the pressure chamber 160 communicates with the third fuel passage 141 and the fourth fuel passage 142, and the feed pressure sensor 150 communicates with the pressure chamber 160.
The metering valve upper bracket 120 and the metering valve lower bracket 140 are connected by a fastener, one end of the on-off solenoid valve 130 is connected to the first fuel passage 121, the other end of the on-off solenoid valve 130 is communicated with the third fuel passage 141, one end of the metering valve 170 is connected to the fourth fuel passage 142, and the other end of the metering valve 170 is connected to the second fuel passage 122.
The oil inlet pressure sensor 150 and the oil outlet pressure sensor 180 are in signal connection with the electronic control unit driving module, and the on-off solenoid valve 130 and the metering valve 170 are in control connection with the electronic control unit driving module.
Referring collectively to fig. 3, the injection module includes a nozzle body 210, a steel ball 220, a spring 230, a setting block 240, a valve spool 250, a nozzle head 260, and a flange 270; the nozzle body 210 is connected to the oil outlet 190 of the metering module 100 through an oil pipe 400.
The flange 270 is welded on the pipe wall of the exhaust pipe 300, the nozzle body 210 is welded on the flange 270, the nozzle head 260 is connected with the lower end of the nozzle body 210, and the steel ball 220, the spring 230, the adjusting cushion block 240 and the valve core 250 are installed in the inner cavities of the nozzle body 210 and the nozzle head 260, wherein the steel ball 220 is positioned between the upper end of the spring 230 and the upper conical surface 211 in the inner cavity of the nozzle body 210, the steel ball 220 is contacted with the upper conical surface 211 in the inner cavity of the nozzle body 210 under the pre-pressure of the spring 230, the adjusting gasket 240 is positioned between the upper end surface of the valve core 250 and the lower plane 212 in the inner cavity of the nozzle body 210, the opening pressure of the injection module 200 can be adjusted through the adjusting gasket 240, the lower end of the spring 230 is abutted against the upper end surface of the valve core 250, and the upper plane of the valve core 250 is contacted with the lower plane of the adjusting gasket 240; the surface of the lower head part of the valve core 250 is circumferentially and uniformly provided with a plurality of chutes 251, so that diesel oil can pass through the chutes conveniently, and the center of the bottom of the nozzle head 260 is provided with an oil injection hole 261.
The working principle of the device of the invention is as follows:
diesel oil enters from the oil inlet joint 110, the electronic control unit driving module energizes the switching electromagnetic valve 130 at a proper time to inject the diesel oil into the pressure cavity 160, meanwhile, the control unit driving module energizes the metering valve 170 at a proper time to inject a certain amount of diesel oil into the injection module 200, the injection module 200 is opened under a certain pressure, the diesel oil is atomized and injected into the exhaust pipe 300 through the oil injection hole 261 at the head of the nozzle head 260, after the diesel oil is operated for a period of time, the electronic control unit driving module stops energizing, the pressure in the oil pipe is reduced, the spring 230 is released, the steel ball 220 is attached to the conical surface of the nozzle body 210 under the action of the spring 230, and the injection module 200 stops injecting.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A diesel vehicle HC injection device, characterized by comprising:
the metering module is provided with an oil inlet joint and an oil outlet joint, a fuel oil channel, a switching electromagnetic valve, a metering valve, an oil inlet pressure sensor and an oil outlet pressure sensor are arranged in the metering module, and the metering valve, the oil inlet pressure sensor, the switching electromagnetic valve and the oil outlet pressure sensor are sequentially connected in series in the fuel oil channel from the end of the oil inlet joint;
the injection module is arranged on an exhaust pipe of the diesel engine, a nozzle head in the injection module injects diesel into the exhaust pipe, and a nozzle body in the injection module is connected with an oil outlet joint in the metering module through an oil pipe;
the metering module further comprises a metering valve upper support and a metering valve lower support, the metering valve upper support is provided with the oil inlet joint, the oil outlet joint and the oil outlet pressure sensor, a first fuel oil channel and a second fuel oil channel are arranged in the metering valve upper support, the oil inlet joint and the oil outlet joint are respectively communicated with the first fuel oil channel and the second fuel oil channel, and the oil outlet pressure sensor is communicated with the second fuel oil channel; the metering valve lower support is provided with an oil inlet pressure sensor, a third fuel oil channel, a fourth fuel oil channel and a pressure cavity are arranged in the metering valve lower support, the pressure cavity is communicated with the third fuel oil channel and the fourth fuel oil channel, and the oil inlet pressure sensor is communicated with the pressure cavity; the upper metering valve support and the lower metering valve support are connected through a fastener, one end of the switch electromagnetic valve is connected with the first fuel oil channel, the other end of the switch electromagnetic valve is communicated with the third fuel oil channel, one end of the metering valve is connected with the fourth fuel oil channel, the other end of the metering valve is connected with the second fuel oil channel, the first fuel oil channel, the third fuel oil channel, the pressure cavity, the fourth fuel oil channel and the second fuel oil channel form the fuel oil channel, the oil inlet pressure sensor and the oil outlet pressure sensor are in signal connection with the electronic control unit driving module, and the switch electromagnetic valve and the metering valve are in control connection with the electronic control unit driving module;
the injection module also comprises a steel ball, a spring, an adjusting cushion block, a valve core and a flange, the flange is welded on the pipe wall of the exhaust pipe, the nozzle body is fixed on the flange, the nozzle head is connected with the lower end of the nozzle body, and the steel ball, the spring, the adjusting cushion block and the valve core are arranged in the inner cavities of the nozzle body and the nozzle head, wherein the steel ball is positioned between the upper end of the spring and the upper conical surface in the inner cavity of the nozzle body, the steel ball is contacted with the upper conical surface in the inner cavity of the nozzle body under the pre-pressure of the spring, the adjusting cushion block is positioned between the upper end surface of the valve core and the lower plane in the inner cavity of the nozzle body, the opening pressure of the injection module can be adjusted through the adjusting cushion block, the lower end of the spring is propped against the upper end face of the valve core, and the upper plane of the valve core is contacted with the lower plane of the adjusting cushion block; the lower head surface of the valve core is circumferentially and uniformly distributed with a plurality of chutes, so that diesel oil can pass through the chutes conveniently, and the center of the bottom of the nozzle head is provided with an oil injection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214553.2A CN106593604B (en) | 2016-12-26 | 2016-12-26 | HC injection device for diesel vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611214553.2A CN106593604B (en) | 2016-12-26 | 2016-12-26 | HC injection device for diesel vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106593604A CN106593604A (en) | 2017-04-26 |
| CN106593604B true CN106593604B (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611214553.2A Active CN106593604B (en) | 2016-12-26 | 2016-12-26 | HC injection device for diesel vehicle |
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| Country | Link |
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| CN (1) | CN106593604B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387207A (en) * | 2017-08-17 | 2017-11-24 | 无锡威孚高科技集团股份有限公司 | A kind of fuel metering injection apparatus for dpf regeneration system |
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|---|---|---|---|---|
| DE102005046070A1 (en) * | 2005-09-27 | 2007-03-29 | Daimlerchrysler Ag | Fuel device for measuring out fuel into an exhaust gas system on a diesel internal combustion engine (ICE) has an injection nozzle linked to the ICE's injection system low-pressure circuit |
| CN101233303A (en) * | 2005-07-26 | 2008-07-30 | 罗伯特·博世有限公司 | Device and method for regenerating a particulate filter |
| CN101389835A (en) * | 2006-02-28 | 2009-03-18 | 戴姆勒股份公司 | Injection system having a device for metering fuel into an exhaust system of an internal combustion engine, and a method for this purpose |
| WO2010072443A1 (en) * | 2008-12-22 | 2010-07-01 | Robert Bosch Gmbh | Device for feeding metered fuel |
| CN102099554A (en) * | 2008-07-16 | 2011-06-15 | 罗伯特·博世有限公司 | Device for metering fuel |
| CN103403315A (en) * | 2011-03-04 | 2013-11-20 | 罗伯特·博世有限公司 | Exhaust gas aftertreatment system of an internal combustion engine and method for feeding a liquid into the exhaust tract of the internal combustion engine |
| CN206280132U (en) * | 2016-12-26 | 2017-06-27 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of diesel vehicle HC injection apparatus |
-
2016
- 2016-12-26 CN CN201611214553.2A patent/CN106593604B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101233303A (en) * | 2005-07-26 | 2008-07-30 | 罗伯特·博世有限公司 | Device and method for regenerating a particulate filter |
| DE102005046070A1 (en) * | 2005-09-27 | 2007-03-29 | Daimlerchrysler Ag | Fuel device for measuring out fuel into an exhaust gas system on a diesel internal combustion engine (ICE) has an injection nozzle linked to the ICE's injection system low-pressure circuit |
| CN101389835A (en) * | 2006-02-28 | 2009-03-18 | 戴姆勒股份公司 | Injection system having a device for metering fuel into an exhaust system of an internal combustion engine, and a method for this purpose |
| CN102099554A (en) * | 2008-07-16 | 2011-06-15 | 罗伯特·博世有限公司 | Device for metering fuel |
| WO2010072443A1 (en) * | 2008-12-22 | 2010-07-01 | Robert Bosch Gmbh | Device for feeding metered fuel |
| CN103403315A (en) * | 2011-03-04 | 2013-11-20 | 罗伯特·博世有限公司 | Exhaust gas aftertreatment system of an internal combustion engine and method for feeding a liquid into the exhaust tract of the internal combustion engine |
| CN206280132U (en) * | 2016-12-26 | 2017-06-27 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of diesel vehicle HC injection apparatus |
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| CN106593604A (en) | 2017-04-26 |
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