CN113202602A - Diesel engine aftertreatment hydrocarbon injection system - Google Patents
Diesel engine aftertreatment hydrocarbon injection system Download PDFInfo
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- CN113202602A CN113202602A CN202110617663.8A CN202110617663A CN113202602A CN 113202602 A CN113202602 A CN 113202602A CN 202110617663 A CN202110617663 A CN 202110617663A CN 113202602 A CN113202602 A CN 113202602A
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
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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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The application relates to a hydrocarbon injection system of diesel engine aftertreatment belongs to the engine aftertreatment field, and it includes: the air pipeline is communicated with a compressed air source; a fuel line in communication with the fuel tank; one end of the oil outlet pipeline is connected with the tail ends of the air pipeline and the fuel pipeline, and the other end of the oil outlet pipeline is provided with an injection piece; the reversing valve is arranged on the air pipeline and the fuel pipeline and at least comprises two input ends and three output ends, the air pipeline and the fuel pipeline are respectively connected to one input end and one output end on two sides of the reversing valve, and the remaining output end of the reversing valve is arranged in a closed mode. The air pipeline and the fuel pipeline share the same reversing valve, the air pipeline or the fuel pipeline can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, the three states can be controlled and realized on one reversing valve, and finally, the high-efficiency control of the diesel engine hydrocarbon injection system is realized, and the complexity and the cost of the whole structure are reduced.
Description
Technical Field
The application relates to the field of engine aftertreatment, in particular to a diesel engine aftertreatment hydrocarbon injection system.
Background
Harmful emissions continue to be a problem in many engine systems in the current automotive industry development, particularly as engines are being subject to increasingly stringent emission standards. The emission standards of an engine may vary depending on the type of engine. For example, a diesel engine may use an aftertreatment system to treat exhaust gas emitted from cylinders of the engine.
In the related art, a fuel addition device for aftertreatment includes a fuel injection mechanism for aftertreatment and a control device. The fuel injection mechanism for aftertreatment includes an air supply system, a fuel supply system, and an internal pressure measurement device. The tail end of the air supply system and the tail end of the fuel supply system are connected to a section of oil outlet pipeline in front of the hydrocarbon injection head together, so that the residual fuel oil in the oil outlet pipeline can be purged after the subsequent air supply system is started, the residual fuel oil enters a subsequent device, and the influence on the transportation of the subsequent fuel oil after cooling and solidification is avoided. The control device has a function of controlling the internal pressure. The control device converts the internal pressure to a pressure greater than that of the exhaust system of the internal combustion engine, so that the fuel can be smoothly sprayed.
However, the air supply system and the fuel supply system in the post-processed fuel injection mechanism need to be independently controlled by using the electric control device, so that the structure of the fuel injection mechanism is complex, the cost is high, and an operator needs to operate both the two systems when the air supply system is subsequently started to purge the partial oil distribution pipeline, so that the operation difficulty and the control mechanism have high thresholds and need to be further improved.
Disclosure of Invention
The embodiment of the application provides a diesel engine aftertreatment hydrocarbon injection system to solve the problems that in the related art, a fuel injection mechanism is complex in structure, high in cost and large in operation difficulty.
In order to achieve the purpose, the following scheme is adopted in the application:
a diesel engine aftertreatment hydrocarbon injection system comprising:
an air line connected to an air compression device;
the fuel pipeline is connected with the fuel tank;
one end of the oil outlet pipeline is connected with the air pipeline and the tail end of the fuel oil pipeline, and the other end of the oil outlet pipeline is provided with an injection piece;
the reversing valve is arranged on the air pipeline and the fuel pipeline and at least comprises two input ends and three output ends, the air pipeline and the fuel pipeline are respectively connected to one input end and the corresponding output end on two sides of the reversing valve, and the rest output ends of the reversing valve are arranged in a closed mode and used for controlling whether the air pipeline or the fuel pipeline is communicated.
Through the scheme, the air pipeline and the fuel oil pipeline share the same reversing valve, the used reversing valve is provided with two input ends and three output ends, the air pipeline or the fuel oil pipeline can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, and three states can be controlled and realized on one reversing valve, so that the complexity of the whole structure is obviously reduced compared with the prior art, and further compared with the prior related art, the cost is obviously reduced under the condition of realizing the same function, and meanwhile, the control operation of compressed air and fuel oil during post-treatment injection and the matching reaction process among devices are simplified; finally, the complexity and the cost of the whole structure are reduced while the efficient control of the hydrocarbon injection system of the diesel engine is realized.
In some embodiments, the reversing valve is a three-position five-way electric control valve, which includes a first input end a, a second input end B, a third output end R, a fourth output end S, and a fifth output end P; at the same time, the user can select the desired position,
the fuel pipeline is respectively communicated with the first input end A and the third output end R on two sides of the reversing valve; the air pipeline is respectively communicated with the second input end B and the fourth output end S at two sides of the reversing valve; the fifth output end P is arranged in a closed manner.
Through the scheme, the three-position five-way type electric control valve is used for realizing automatic and accurate state switching of the air pipeline and the fuel pipeline after the air pipeline and the fuel pipeline are connected with the set processor, so that switching use and closing states of the air pipeline and the fuel pipeline are realized, and operation is simplified.
In some embodiments, the air pipeline and the fuel pipeline are provided with one-way valves on pipelines between the reversing valve and the oil outlet pipeline.
Through above-mentioned scheme, go out the oil pipe way and be connected the exhaust pipe way in the trailing end, can flow back to an oil pipe way for aftertreatment's tail gas in the exhaust pipe way, the check valve that sets up this moment will effectively prevent tail gas to continue to flow back to switching-over valve department, and the particulate matter is attached to and pollutes the switching-over valve in avoiding tail gas, and then ensures that this system has better treatment effect when carrying out the tail gas aftertreatment.
In some embodiments, a fuel injection metering assembly is disposed on the fuel line.
Through above-mentioned scheme, realize when carrying out tail gas aftertreatment, the fuel that this system used can obtain accurate control and measurement, and then realizes effectively avoiding the extravagant phenomenon of fuel to produce when fully carrying out tail gas treatment.
In some embodiments, the fuel injection metering assembly comprises:
a fuel pressure sensor;
a fuel metering valve disposed downstream of the fuel pressure sensor for metering an amount of fuel therethrough.
Through the scheme, when the fuel pipeline is opened and fuel is sent to the oil outlet pipeline, the fuel pressure sensor can monitor the fuel pressure, the fuel metering valve controls the opening according to the instruction of the engine electric control unit to accurately meter the passing fuel amount, and the metered fuel enters the hydrocarbon injector and is injected to the tail pipe.
In some embodiments, a collecting pipeline is arranged on the oil outlet pipeline, a residual oil collecting box is arranged at the end, far away from the oil outlet pipeline, of the collecting pipeline, and a three-way valve is arranged between the oil outlet pipeline and the collecting pipeline and used for communicating the oil outlet pipeline with the collecting pipeline/the injection piece.
Through the scheme, after fuel oil is conveyed into the exhaust pipeline and particle combustion post-treatment is carried out, residual fuel oil in the oil outlet pipeline is blown and swept by compressed air sent out by the air pipeline after the oil outlet pipeline is communicated with the air pipeline, at the moment, the set three-way valve switches the oil outlet pipeline to be communicated with the collecting pipeline, the residual fuel oil is sent out through the collecting pipeline and finally enters the residual oil collecting box to be collected, and the residual oil is further utilized subsequently. Directly sweep the residual oil among the prior art and carry out combustion processing in the exhaust pipe, and because the particulate matter that needs the burning in the exhaust pipe this moment has fully burnt in the aftertreatment process of fuel pipeline fuel feeding burning, so also mean that the residual fuel that prior art insufflates in the exhaust pipe this moment does not obtain effective utilization, and will cause the extravagant volume of fuel to promote gradually to higher level after this part system uses for a long time, this scheme then finally collects this part of residual fuel to the residual oil collection box, and then make things convenient for follow-up to recycle after reaching a certain amount, realize effectively reducing the extravagant level of fuel in this system.
In some embodiments, the three-way valve is an electrically controlled three-way valve electrically connected to the direction valve, and the oil outlet pipe is communicated with the collecting pipe when the air pipe is communicated with the fuel oil pipe.
Through the scheme, when the reversing valve controls the communication between the air pipeline and the oil outlet pipeline, the oil outlet pipeline can be synchronously communicated with the collecting pipeline, so that the residual fuel oil in the oil outlet pipeline can be collected after being swept while the operation control is simplified, the waste of the fuel oil is reduced, and the vehicle performance is improved.
In some embodiments, the collecting line is provided in a region of the oil outlet line near the injector.
Through the scheme, the residual fuel in the oil outlet pipeline can enter the collecting pipeline after being blown to the maximum extent, and the sufficient recovery and subsequent reutilization of the residual fuel are realized.
In some embodiments, an oil return pipeline and an oil supply member are arranged between the residual oil collecting tank and the oil tank, so as to convey the fuel oil in the residual oil collecting tank into the oil tank.
Through above-mentioned scheme, realize that the fuel in the residual oil collecting box can be sent back to the oil tank and obtain reuse, and then avoid the extravagant condition of fuel and reduce the oil consumption of vehicle.
In some embodiments, a liquid level sensor is disposed in the residual oil collecting tank, and the liquid level sensor is electrically connected to the oil supply unit.
Through the scheme, utilize the electric connection of liquid level response piece and fuel feeding spare, the realization can be sent into the oil tank with it after the residual oil collecting box fuel oil mass is collected to the certain degree and is used, avoid carrying out the high frequency when the residual oil collecting box fuel oil is less and shift and extravagant consumption, also avoid the residual oil collecting box fuel oil too much to cause the condition that can't hold smoothly to appear simultaneously, make the interior fuel recovery of residual oil collecting box all obtain effective guarantee with recycling, have apparent practical meaning.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a diesel engine post-processing hydrocarbon injection system, through the scheme, an air pipeline and a fuel pipeline share the same reversing valve, the used reversing valve is provided with two input ends and three output ends, the air pipeline or the fuel pipeline can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, three states can be controlled and realized on one reversing valve, the complexity of the whole structure is obviously reduced compared with the prior art, further, compared with the prior related technology, the cost is obviously reduced under the condition of realizing the same function, and meanwhile, the control operation of compressed air and fuel during post-processing injection and the matched reaction flow among devices are simplified; in addition, the collection pipeline and the three-way valve arranged on the oil outlet pipeline enable the residual fuel oil in the oil outlet pipeline to be collected and recycled in the follow-up process after being blown, so that the oil consumption of the whole vehicle is reduced, and the vehicle performance is improved. Finally, the high-efficiency control and cost reduction of the diesel engine hydrocarbon injection system are realized on the air pipeline and the fuel pipeline, and the fuel is collected and recycled on the oil outlet pipeline, so that the overall performance of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram provided in an embodiment of the present application.
In the figure:
1. an air line;
2. a fuel line; 20. a fuel injection metering assembly; 200. a fuel pressure sensor;
201. a fuel metering valve;
3. an oil outlet pipeline; 30. a spray member; 31. a collection pipeline; 32. a residual oil collecting box;
33. a three-way valve; 34. an oil return line; 35. an oil supply member;
4. a diverter valve; A. a first input terminal; B. a second input terminal; r, a third output end;
s, a fourth output end; p, a fifth output end;
5. a one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related technology, the tail end of an air supply system and the tail end of a fuel supply system in a fuel adding device for post-processing are connected to a section of oil outlet pipeline in front of a hydrocarbon injection head together, so that the residual fuel oil in the oil outlet pipeline can be purged after a subsequent air supply system is started, the residual fuel oil enters a subsequent device, and the influence on the transportation of the subsequent fuel oil after cooling and solidification is avoided. However, in the fuel injection mechanism for post-processing in the scheme, the air supply system and the fuel supply system respectively need to be independently controlled by using an electric control device, so that the structure of the fuel injection mechanism is complex, the cost is high, and when the air supply system is subsequently started to purge the partial oil distribution pipeline, an operator needs to control and operate the two parts of systems, so that the operation difficulty and the control mechanism have high thresholds.
The following is a diesel engine aftertreatment hydrocarbon injection system provided by an embodiment of the application to solve the above problems.
A diesel engine aftertreatment hydrocarbon injection system comprising:
an air line 1, which communicates with a compressed air source;
a fuel line 2 communicating with a fuel tank;
an oil outlet pipeline 3, one end of which is connected with the air pipeline 1 and the tail end of the fuel pipeline 2, and the other end of which is provided with an injection piece 30;
the reversing valve 4 is arranged on the air pipeline 1 and the fuel pipeline 2 and at least comprises two input ends and three output ends, the air pipeline 1 and the fuel pipeline 2 are respectively connected to one input end and one output end on two sides of the reversing valve 4, and the remaining output end of the reversing valve 4 is arranged in a closed mode and used for controlling whether the air pipeline 1 or the fuel pipeline 2 is communicated or not.
The reversing valve 4 is a three-position five-way type electric control valve and comprises a first input end A, a second input end B, a third output end R, a fourth output end S and a fifth output end P; at the same time, the user can select the desired position,
the fuel pipeline 2 is respectively communicated with the first input end A and the third output end R at two sides of the reversing valve 4; the air pipeline 1 is respectively communicated with the second input end B and the fourth output end S at two sides of the reversing valve 4; the fifth output end P is arranged in a closed manner.
The air pipeline 1 and the fuel pipeline 2 are provided with one-way valves 5 on pipelines between the reversing valve 4 and the oil outlet pipeline 3.
The fuel pipeline 2 is provided with a fuel injection metering component 20.
The fuel injection metering assembly 20 includes:
a fuel pressure sensor 200;
a fuel metering valve 201 is provided downstream of the fuel pressure sensor 200 for metering the amount of fuel passing therethrough.
The oil outlet pipeline 3 is provided with a collecting pipeline 31, the tail end of the collecting pipeline 31 far away from the oil outlet pipeline 3 is provided with a residual oil collecting box 32, and a three-way valve 33 is arranged between the oil outlet pipeline 3 and the collecting pipeline 31 and used for communicating the oil outlet pipeline 3 with the collecting pipeline 31/the injection member 30.
The three-way valve 33 is an electrically controlled three-way valve 33, the electrically controlled three-way valve 33 is electrically connected with the reversing valve 4, and when the air pipeline 1 is communicated with the fuel pipeline 2, the oil outlet pipeline 3 is communicated with the collecting pipeline 31.
The collecting line 31 is arranged in the region of the oil outlet line 3 close to the injector 30.
An oil return pipeline 34 and an oil supply part 35 are arranged between the residual oil collecting box 32 and the oil tank, so that the oil in the residual oil collecting box 32 is conveyed into the oil tank.
A liquid level sensing part is arranged in the residual oil collecting box 32 and electrically connected with the oil supply part 35.
The scheme provides a diesel engine aftertreatment hydrocarbon injection system, through the scheme, an air pipeline 1 and a fuel oil pipeline 2 share the same reversing valve 4, the used reversing valve 4 is provided with two input ends and three output ends, the air pipeline 1 or the fuel oil pipeline 2 can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, three states can be controlled and realized on one reversing valve 4, the complexity of the whole structure is obviously reduced compared with the prior art, and further compared with the prior art, the cost is obviously reduced under the condition of realizing the same function, and meanwhile, the control operation of compressed air and fuel oil in aftertreatment injection and the matching reaction process among devices are simplified; in addition, the collection pipeline 31 and the three-way valve 33 arranged on the oil outlet pipeline 3 can collect and recycle the residual fuel oil in the oil outlet pipeline 3 after the residual fuel oil is purged, so that the oil consumption of the whole vehicle is reduced, and the vehicle performance is improved. Finally, the high-efficiency control and cost reduction of the diesel engine hydrocarbon injection system are realized on the air pipeline 1 and the fuel pipeline 2, the fuel is collected and recycled on the oil outlet pipeline 3, and the overall performance of the system is improved.
Referring to fig. 1, in the embodiment of the present application, a diesel engine aftertreatment hydrocarbon injection system includes an air pipeline 1, a fuel pipeline 2, an oil outlet pipeline 3 and a reversing valve 4; wherein, the air pipeline 1 is connected with an air compression device; the fuel pipeline 2 is connected with a fuel tank; one end of the oil outlet pipeline 3 is connected with the tail ends of the air pipeline 1 and the fuel oil pipeline 2, and the other end of the oil outlet pipeline is provided with an injection piece 30; the reversing valve 4 is arranged on the air pipeline 1 and the fuel pipeline 2 and at least comprises two input ends and three output ends, the air pipeline 1 and the fuel pipeline 2 are respectively connected to one input end and one corresponding output end at two sides of the reversing valve 4, and the remaining output end of the reversing valve 4 is arranged in a closed manner and used for controlling whether the air pipeline 1 or the fuel pipeline 2 is communicated.
Specifically, the air pipeline 1 and the fuel oil pipeline 2 share the same reversing valve 4, the used reversing valve 4 is provided with two input ends and three output ends, the air pipeline 1 or the fuel oil pipeline 2 can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, and three states can be controlled and realized on one reversing valve 4, so that the complexity of the whole structure is obviously reduced compared with the prior art, and further compared with the prior related art, under the condition of realizing the same function, the cost is obviously reduced, and meanwhile, the control operation of compressed air and fuel oil during the post-processing injection and the matching reaction process among devices are simplified; finally, the complexity and the cost of the whole structure are reduced while the efficient control of the hydrocarbon injection system of the diesel engine is realized.
Further, referring to fig. 1, the reversing valve 4 is a three-position five-way type electric control valve, which includes a first input end a, a second input end B, a third output end R, a fourth output end S, and a fifth output end P; meanwhile, the fuel pipeline 2 is respectively communicated with a first input end A and a third output end R at two sides of the reversing valve 4; the air pipeline 1 is respectively communicated with a second input end B and a fourth output end S at two sides of the reversing valve 4; the fifth output end P is arranged in a closed manner.
Specifically, the three-position five-way type electric control valve is used for realizing that the air pipeline 1 and the fuel pipeline 2 can be automatically and accurately switched in states after being connected with a set processor, so that the air pipeline 1 and the fuel pipeline 2 are switched in use and are closed, and the operation is simplified.
Further, referring to fig. 1, the air line 1 and the fuel line 2 are provided with check valves 5 on the lines between the reversing valve 4 and the oil outlet line 3.
Specifically, a check valve 5 is provided to allow compressed air or fuel to flow from the air line 1 or the fuel line 2 to the oil outlet line 3. Because oil outlet pipeline 3 is because tail-end connection exhaust pipe, can flow back to oil outlet pipeline 3 in for the tail gas of aftertreatment among the exhaust pipe, the check valve 5 that sets up this moment will effectively prevent tail gas to continue to flow back to 4 departments of switching-over valve, avoids particulate matter in the tail gas to adhere to and pollute switching-over valve 4, and then ensures that this system has better treatment effect when carrying out the tail gas aftertreatment.
Further, referring to FIG. 1, a fuel injection metering assembly 20 is provided in the fuel line 2.
Specifically, when the tail gas aftertreatment is carried out, the fuel used by the system can be accurately controlled and metered, so that the waste of the fuel is effectively avoided while the tail gas aftertreatment is fully carried out.
Further, referring to fig. 1, the fuel injection metering assembly 20 includes a fuel pressure sensor 200 and a fuel metering valve 201. Therein, a fuel metering valve 201 is provided downstream of the fuel pressure sensor 200 for metering the amount of fuel passing therethrough.
Specifically, when the fuel pipeline 2 is opened and fuel is sent to the fuel outlet pipeline 3, the fuel pressure sensor 200 can monitor the fuel pressure, the fuel metering valve 201 controls the opening according to the instruction of the engine electronic control unit to accurately meter the passing fuel amount, and the metered fuel enters the hydrocarbon injector and is injected to the tail pipe.
Further, a collecting pipeline 31 is arranged on the oil outlet pipeline 3, a residual oil collecting box 32 is arranged at the tail end, far away from the oil outlet pipeline 3, of the collecting pipeline 31, and a three-way valve 33 is arranged between the oil outlet pipeline 3 and the collecting pipeline 31 and used for communicating the oil outlet pipeline 3 with the collecting pipeline 31/the injection piece 30.
Specifically, after the fuel oil is conveyed into the exhaust pipeline and the particle combustion aftertreatment is performed, the residual fuel oil in the oil outlet pipeline 3 is purged by the compressed air sent out from the air pipeline 1 after the oil outlet pipeline 3 is communicated with the air pipeline 1, and at the moment, after the oil outlet pipeline 3 is switched to be communicated with the collecting pipeline 31 by the arranged three-way valve 33, the residual fuel oil is sent out through the collecting pipeline 31 and finally enters the residual oil collecting box 32 to be collected and is further utilized subsequently. Directly sweep the residual oil among the prior art and carry out combustion processing in the exhaust pipe, and because the particulate matter that needs the burning in the exhaust pipe this moment has fully burnt in the aftertreatment process of fuel pipeline 2 fuel feeding burning, so also mean that the residual fuel that prior art insufflates in the exhaust pipe this moment does not obtain effective utilization, and will cause the fuel extravagant volume to promote gradually to higher level after this part system uses for a long time, this scheme then finally collects this part of residual fuel to the residual oil collecting box 32 in, and then make things convenient for follow-up to recycle after reaching a certain amount, realize effectively reducing the extravagant level of fuel in this system.
Further, the three-way valve 33 is an electrically controlled three-way valve 33, the electrically controlled three-way valve 33 is electrically connected to the direction valve 4, and when the air pipeline 1 is communicated with the fuel pipeline 2, the oil outlet pipeline 3 is communicated with the collecting pipeline 31.
Specifically, when the reversing valve 4 controls the communication between the air pipeline 1 and the oil outlet pipeline 3, the oil outlet pipeline 3 can be synchronously communicated with the collecting pipeline 31, so that the operation control is simplified, and meanwhile, the residual fuel oil in the oil outlet pipeline 3 can be collected after being blown, the fuel oil waste is reduced, and the vehicle performance is improved.
Further, with reference to fig. 1, a collecting line 31 is provided in the region of the oil outlet line 3 close to the jet member 30.
Specifically, the residual fuel in the oil outlet pipeline 3 can enter the collecting pipeline 31 after being blown to the maximum extent, and the sufficient recovery and subsequent reutilization of the residual fuel are realized.
Further, referring to fig. 1, a return line 34 and an oil supply member 35 are provided between the residual oil collecting tank 32 and the oil tank for supplying the oil in the residual oil collecting tank 32 to the oil tank.
In particular, the fuel in the residual fuel collecting tank 32 can be sent back to the fuel tank for recycling, thereby avoiding the waste of the fuel and reducing the fuel consumption of the vehicle.
In this embodiment, the oil supply unit 35 is a liquid pump disposed on the oil return line 34, and is used for conveying the residual oil collected in the residual oil collection tank 32 to the oil tank after starting, so as to recycle the collected residual oil.
Further, a liquid level sensor (not shown) is disposed in the residual oil collecting tank 32, and the liquid level sensor is electrically connected to the oil supply unit 35.
Concretely, utilize the electric connection of liquid level response piece and fuel feeding 35, the realization can be sent into the oil tank with it after the oil mass is collected to a certain degree in residual oil collecting box 32 and is used, avoid carrying out the high frequency and shift and extravagant consumption when residual oil collecting box 32 internal combustion oil is less, also avoid the too much condition that leads to the fact unable smooth holding of residual oil collecting box 32 internal combustion oil to appear simultaneously, make the recovery and the reuse of the interior fuel of residual oil collecting box 32 all effectively ensured, have apparent practical meaning.
In this embodiment, the liquid level sensing element is a liquid level sensor, and a processor (not shown in the figure) is disposed between the liquid level sensing element and the oil supply element 35, and is configured to analyze and determine a signal acquired by the liquid level sensing element, so as to select whether to start the oil supply element 35 for fuel oil delivery.
The working principle and the beneficial effects of the embodiment of the application are as follows: according to the scheme, an air pipeline 1 and a fuel pipeline 2 share the same reversing valve 4, the reversing valve 4 is provided with two input ends and three output ends, the air pipeline 1 or the fuel pipeline 2 can be controlled to be communicated for use, the system can be closed by utilizing one closed output end when needed, three states can be controlled and realized on one reversing valve 4, the complexity of the whole structure is obviously reduced compared with the prior art, the cost is obviously reduced compared with the prior art under the condition of realizing the same function, and meanwhile, the control operation of compressed air and fuel during the post-processing injection and the matched reaction process among devices are simplified; in addition, the collection pipeline 31 and the three-way valve 33 arranged on the oil outlet pipeline 3 can collect and recycle the residual fuel oil in the oil outlet pipeline 3 after the residual fuel oil is purged, so that the oil consumption of the whole vehicle is reduced, and the vehicle performance is improved. Finally, the high-efficiency control and cost reduction of the diesel engine hydrocarbon injection system are realized on the air pipeline 1 and the fuel pipeline 2, the fuel is collected and recycled on the oil outlet pipeline 3, and the overall performance of the system is improved.
In the description of the present application, it is to be understood that the forward direction of "X" in the drawings represents the right direction, and correspondingly, the reverse direction of "X" represents the left direction; the forward direction of "Y" represents forward, and correspondingly, the reverse direction of "Y" represents rearward; the forward direction of "Z" represents the upward direction, and correspondingly, the reverse direction of "Z" represents the downward direction, and the directions or positional relationships indicated by the terms "X", "Y", "Z", etc. are based on the directions or positional relationships shown in the drawings of the specification, and are only for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular direction, be constructed and operated in a particular direction, and thus should not be construed as limiting the present application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A diesel engine aftertreatment hydrocarbon injection system, comprising:
an air line (1) which communicates with a compressed air source;
a fuel line (2) communicating with the fuel tank;
an oil outlet pipeline (3), one end of which is connected with the air pipeline (1) and the tail end of the fuel pipeline (2), and the other end of which is provided with an injection piece (30);
the reversing valve (4) is arranged on the air pipeline (1) and the fuel pipeline (2) and at least comprises two input ends and three output ends, the air pipeline (1) and the fuel pipeline (2) are respectively connected to one input end and one output end on two sides of the reversing valve (4), and the remaining output end of the reversing valve (4) is arranged in a closed mode and used for controlling whether the air pipeline (1) or the fuel pipeline (2) is communicated or not.
2. A diesel engine hydrocarbon injection system as in claim 1, characterized in that the directional control valve (4) is a three-position five-way electric control valve comprising a first input (a), a second input (B), a third output (R), a fourth output (S), a fifth output (P); at the same time, the user can select the desired position,
the fuel pipeline (2) is respectively communicated with the first input end (A) and the third output end (R) at two sides of the reversing valve (4); the air pipeline (1) is respectively communicated with the second input end (B) and the fourth output end (S) at two sides of the reversing valve (4); the fifth output end (P) is arranged in a closed manner.
3. A diesel engine hydrocarbon injection system as claimed in claim 1, characterized in that the air line (1) and the fuel line (2) are each provided with a one-way valve (5) on the line between the reversing valve (4) and the oil outlet line (3).
4. A diesel engine hydrocarbon injection system as claimed in claim 1, characterised in that a fuel injection metering assembly (20) is provided on the fuel line (2).
5. The diesel engine hydrocarbon injection system of claim 4, wherein the fuel injection metering assembly (20) comprises:
a fuel pressure sensor (200);
a fuel metering valve (201) disposed downstream of the fuel pressure sensor (200) for metering an amount of fuel therethrough.
6. The hydrocarbon injection system of the diesel engine as recited in claim 2, characterized in that a collecting pipeline (31) is arranged on the oil outlet pipeline (3), a residual oil collecting tank (32) is arranged at the end of the collecting pipeline (31) far away from the oil outlet pipeline (3), and a three-way valve (33) is arranged between the oil outlet pipeline (3) and the collecting pipeline (31) for communicating the oil outlet pipeline (3) with the collecting pipeline (31)/the injection member (30).
7. The hydrocarbon injection system of a diesel engine as set forth in claim 6, characterized in that the three-way valve (33) is an electrically controlled three-way valve (33), the electrically controlled three-way valve (33) being electrically connected to the selector valve (4), the oil outlet line (3) being in communication with the collecting line (31) when the air line (1) is in communication with the fuel line (2).
8. Diesel engine hydrocarbon injection system according to claim 6, characterised in that the collecting line (31) is provided in the region of the oil outlet line (3) close to the injector (30).
9. Diesel engine hydrocarbon injection system according to claim 6, characterised in that between the residual oil collecting tank (32) and the tank there is a return line (34) and a supply (35) for fuel oil in the residual oil collecting tank (32) to the tank.
10. The diesel engine hydrocarbon injection system of claim 9, wherein a liquid level sensor is provided in the residual oil collection tank (32), and the liquid level sensor is electrically connected to the oil supply member (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110617663.8A CN113202602A (en) | 2021-05-31 | 2021-05-31 | Diesel engine aftertreatment hydrocarbon injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110617663.8A CN113202602A (en) | 2021-05-31 | 2021-05-31 | Diesel engine aftertreatment hydrocarbon injection system |
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| CN113202602A true CN113202602A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110617663.8A Pending CN113202602A (en) | 2021-05-31 | 2021-05-31 | Diesel engine aftertreatment hydrocarbon injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115324689A (en) * | 2022-08-23 | 2022-11-11 | 上海弗列加滤清器有限公司 | Hydrocarbon injection system and control method and application thereof |
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