CN109339907B - Miniaturized DPF system with thermal management - Google Patents
Miniaturized DPF system with thermal management Download PDFInfo
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- CN109339907B CN109339907B CN201811546919.5A CN201811546919A CN109339907B CN 109339907 B CN109339907 B CN 109339907B CN 201811546919 A CN201811546919 A CN 201811546919A CN 109339907 B CN109339907 B CN 109339907B
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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
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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
- F01N3/0234—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 heat exchange means in the exhaust line
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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
- F01N3/05—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 air, e.g. by mixing exhaust with air
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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
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The application relates to a miniaturized DPF system with heat management, which comprises a mass flowmeter, an air regulation and control device, a heating device, a control core, a DPF main body regeneration section and a cooling device, wherein the air regulation and control device is a laboratory device or a vehicle-mounted device; the DPF cooling device adopts a 'water-cooling cylinder sleeve' structure and comprises a cooling water cavity, a cooling water tank, a water pump, a cooler and a temperature sensor, wherein the cooling water cavity is sleeved on the regeneration section of the DPF main body, and cooling liquid is filled in the cooling water cavity; the filter body of the DPF main body comprises an open channel with a baffle plate arranged in the middle of openings at two ends and a closed channel blocked at two ends; the partition plate divides the open channel into two spaces, the closed channel is provided with a filter cavity, and the two spaces of the filter cavity cross the open channel; the plurality of closed channels are arranged around the open channels in the length direction by taking the open channels as the center, and the wall surfaces of the open channels are all filter surfaces. The system adopts labyrinth filtration, ensures that the DPF can be regenerated in time, and realizes the miniaturization of the DPF system.
Description
Technical Field
The application relates to a small-sized collection and treatment device for exhaust gas emitted by an engine, in particular to a small-sized DPF system with thermal management.
Background
The diesel engine has the characteristics of low fuel consumption, strong power and high reliability, and is widely applied to the fields of transportation, engineering machinery, agricultural machinery and the like. However, exhaust particulates from diesel engines pose a great threat to the environment and human health and their emissions must be reduced. From the technical aspect, the emission of diesel particulates is reduced by improving the combustion process and the fuel quality of the engine, and the like, so that the emission of the diesel particulates tends to be limited, an after-treatment device, namely an exhaust particulate trap, is required to be added to the diesel engine, and the particulate trap is one of the most effective and most promising after-treatment technologies for controlling the emission of the particulates. The filter body with a special structure is made of a special filter material, and is used for filtering and treating the filtered particulate matters so as to reduce pollution of exhaust gas to air and harm to human health. Chinese patent No. ZL201721037931.4 proposes an active regeneration system for DPF with annular cooling device. The system is provided with the oxygen bottle, cannot be used in actual working conditions, the annular cooling device controls the DPF core body to work at a proper temperature through the control center, and can efficiently treat particulate matters in time so as to enable the DPF to be regenerated.
Disclosure of Invention
In view of the shortcomings of the prior art, the present application is directed to a miniaturized DPF system with thermal management. The system adopts labyrinth filtration, so that the filtration efficiency is improved, the volume of a filter body is reduced, the exhaust resistance is increased, but the DPF is more easily blocked by particulate matters due to the reduction of the aperture of a micropore, so that a pumping device is additionally arranged, a pressure measuring device is additionally arranged on the main body of a DPF regeneration section, the lower exhaust resistance is ensured, DPF regeneration control is performed, the DPF can be timely regenerated, and the miniaturization of a DPF system is realized.
The application solves the technical problems by adopting the technical scheme that:
the miniaturized DPF system with the heat management comprises a mass flowmeter, an air regulating device, a heating device, a control core, a DPF main body regeneration section and a cooling device, wherein the mass flowmeter is arranged on a diesel engine exhaust pipeline, the air regulating device and the heating device are sequentially arranged on the diesel engine exhaust pipeline behind the mass flowmeter,
the system also comprises a pumping device, wherein the heating device is connected with an air inlet of the regeneration section of the DPF main body after passing through the pumping device, and a DPF cooling device is arranged outside the regeneration section of the DPF main body; the DPF main body regeneration section, the cooling device, the air pumping device, the air regulating device, the mass flowmeter and the heating device are all connected with the control core, and the control core controls the running state of each component;
the air regulating device is a laboratory device or a vehicle-mounted device;
the DPF cooling device adopts a 'water-cooling cylinder sleeve' structure and comprises a cooling water cavity, a cooling water tank, a water pump, a cooler and a temperature sensor, wherein the cooling water cavity is wrapped outside a DPF main body regeneration section, namely, the cooling water cavity is sleeved on the DPF main body regeneration section, cooling liquid is filled in the cooling water cavity, an insulation layer is arranged on the outer surface of the cooling water cavity, the water outlet pipeline of the cooling water tank is connected with the water pump again, and the water inlet of the cooling water tank is connected with the cooler; a temperature sensor is arranged at the water inlet of the cooling water tank;
the filter body of the DPF main body comprises an open channel with a baffle plate arranged in the middle of openings at two ends and a closed channel blocked at two ends; the partition plate divides the open channel into two spaces, the closed channel is provided with a filter cavity, and the two spaces of the filter cavity cross the open channel; the plurality of closed channels are arranged around the open channels in the length direction by taking the open channels as the center, and the wall surfaces of the open channels are all filter surfaces.
Compared with the prior art, the application has the beneficial effects that:
1. compared with the prior art, the system has the advantages that the volume is greatly reduced, the main volume is reduced in the DPF main body structure, labyrinth filtration is adopted, the diameter of the DPF main body structure can be obviously reduced, the length of the DPF main body structure is greatly reduced due to smaller micropore diameter, the filtration speed is not reduced, the micropore diameter is reduced, the regeneration section of the DPF main body still has higher filtration speed under the condition of reducing the volume by adding the pumping device, and the filtration efficiency is obviously improved.
2. The novel DPF adopts an oxygenation and heating mode to strengthen the regeneration process, and the structure is small, so that the DPF has higher heat load, a cooling device with a water-cooling cylinder sleeve structure is adopted, and a water pump is added to a cooling water tank, so that the flow rate of cooling liquid is improved, the heat exchange is accelerated, and the heat exchange effect is enhanced.
3. The system can be used on a vehicle, when the system is used on the vehicle, an air pipeline is used for replacing an air bottle, so that the volume of the whole system is further reduced, and the air inflow is reasonably controlled by an air extractor, a one-way valve and an electric control valve under the control of a control core, so that the DPF regeneration main body is regenerated under the state of higher oxygen content.
Drawings
FIG. 1 is a block diagram of one embodiment of a laboratory setup version of the DPF regeneration control system of the present application.
FIG. 2 is a block diagram of one embodiment of an onboard device version of the DPF regeneration control system of the present application.
Fig. 3 is a schematic view of a regeneration main section of the DPF regeneration device of the present application.
In fig. 1, a mass flowmeter, 2, a heating device, 3, a pumping device, 4, an air regulating device, 5, a control core, 6, a data acquisition card, 7, a DPF main body regeneration section and a cooling device, 8, a DPF main body regeneration section pressure sensor, 9, a DPF main body regeneration section temperature sensor, 401, a flow control device, 402, an electric control valve, 403, an air bottle, 404, a check valve, 405, an air extractor, 406, a thermostat, 407 pressure sensor, 701, a cooling water cavity, 702, a DPF main body regeneration section, 703, a water pump, 704, a temperature sensor, 705, a cooling water tank, 706, a cooler
In fig. 2, 406, thermostats, 404, check valves, 405, air extractors, 407, pressure sensors.
Detailed Description
The present application will be further described with reference to examples and drawings, which should not be construed as limiting the scope of the application.
The application relates to a miniaturized DPF system with heat management, which comprises a mass flowmeter 1, an air regulation device 4, a heating device 2, a control core 5, a pumping device 3, a DPF main body regeneration section and a cooling device 7, wherein the mass flowmeter 1 is arranged on a diesel engine exhaust pipeline; the DPF main body regeneration section, the cooling device 7, the pumping device 3, the air regulating device 4, the mass flowmeter 1, the heating device 2 and the water pump 703 are all connected with the control core 5, and the control core 5 controls the running states of all the components;
the air conditioning device can be respectively arranged into a laboratory device (4 in fig. 1) and a vehicle-mounted device (4 in fig. 2), wherein the laboratory device can be used for testing when testing, but the volume is large due to the existence of the air bottle device, so that the device is changed into the vehicle-mounted device when in actual use.
The laboratory device comprises a flow control device 401, an electric control valve 402, an air bottle 403, a one-way valve 404, an air extractor 405, a thermostat 406 and a pressure sensor 407, wherein the air bottle is filled with air, the pressure sensor can detect the pressure, then the air extractor 405 is directly used for supplementing the air, the thermostat 406 is arranged outside the air bottle, the temperature in the air bottle is controlled through the thermostat 406, the opening of the air bottle is controlled by the one-way valve 404, the outlet of the flow control device 401 is connected with the electric control valve 402, and the inlet of the flow control device 401 is connected with the exhaust port of the diesel engine, so that the DPF regeneration main body section reaches the regeneration condition under the proper condition. The thermostat is installed outside the air tank. The laboratory device can simulate the actual automobile working condition under the laboratory condition, and the air inlet condition under the actual condition is adopted, so that experimental data can be obtained through the laboratory device to obtain data of the vehicle-mounted device, such as wind pressure, temperature and the like, and further the system can be used on an automobile for actual use.
The vehicle-mounted device comprises a flow control device 401, an electric control valve 402, a thermostat 406, a one-way valve 404, an air extractor 405 and a pressure sensor 407, wherein the pressure sensor 407 is used for detecting pressure, the pressure sensor 407, the air extractor 405 and the one-way valve 404 are all connected with a control core, the air extractor 405 and the one-way valve 404 can ensure air inflow through the control core 5, the thermostat 406 is installed at an air pipeline, the thermostat is installed on the air pipeline, the temperature in the upper end of the air pipeline is controlled through the thermostat 406, the electric control valve 402 is installed behind the thermostat pipeline, the flow control device 401 is connected behind the electric control valve, and a diesel engine exhaust port is connected behind the flow control device, so that a DPF regeneration main body section is regenerated under the condition that the oxygen content is increased. The vehicle-mounted device directly installs the thermostat outside the pipeline, so that an air bottle is removed, and the volume can be effectively reduced.
The DPF cooling device adopts a 'water-cooling cylinder sleeve type' structure to replace an annular cooling device, and is additionally provided with a water pump to accelerate the flow rate of cooling water, so that the heat exchange effect is enhanced, the DPF cooling device comprises a cooling water cavity 701, a cooling water tank 705, a water pump 703, a cooler 706 and a temperature sensor 704, wherein the cooling water cavity 701 is wrapped outside a DPF main body regeneration section 702, namely, the cooling water cavity is sleeved on the DPF main body regeneration section 702, cooling liquid is filled in the cooling water cavity, an insulating layer is arranged on the outer surface of the cooling water cavity, the water pump 703 is connected on a water outlet pipeline of the cooling water tank, the cooling liquid is pumped out from the cooling water tank 705, the cooling liquid is circulated at a high speed, a water inlet of the cooling water tank 705 is connected with the cooler 706, the high-temperature cooling liquid is cooled, and the cooling circulation is completed. A temperature sensor 704 is installed at the inlet of the cooling water tank 705 to detect the temperature of the cooling liquid and transmit data to the control core 5, and cooling is started when the temperature exceeds a limit value to prevent the DPF from being regenerated to be damaged at a high temperature.
A DPF main body regeneration section pressure sensor 8 and a DPF main body regeneration section temperature sensor 9 are arranged at the air inlet and the air outlet of the DPF main body regeneration section;
the filter body of the DPF main body adopts a labyrinth structure and comprises an open channel with two ends open and a closed channel with two ends blocked, wherein the middle of the open channel is provided with a baffle plate; the partition plate divides the open channel into two spaces, the closed channel is provided with a filter cavity, and the two spaces of the filter cavity cross the open channel; the open channel is rectangular, and four sides of the rectangle are respectively connected with a closed channel along the length direction; in a top view of the filter body, the closed channels are spaced from the open channels; the four sides of the open channel are all filter surfaces. The two sides of the closed channel are plugged, the open channel is provided with a baffle plate in the middle, and the open channel and the closed channel are arranged at intervals, after the exhaust gas is forced to enter from the open channel, the exhaust gas enters the filter cavity of the closed channel through the porous ceramic wall surface (filter surface), but the two sides of the closed channel are plugged, the exhaust gas can pass through the porous ceramic wall surface to the other side of the baffle plate of the open channel again, so that the exhaust gas can be filtered twice through one open channel and one closed channel (see the arrow in fig. 3 for simulating the exhaust gas flow direction). When the length of the filter body is longer, the filter body can be correspondingly connected along the axial direction through a plurality of open channels and closed channels in sequence, so that multiple times of filtration can be completed.
In the present application, the pore diameter of the micropores of the filter surface is preferably 6 to 10. Mu.m.
The DPF main body regeneration section pressure sensor 8, the DPF main body regeneration section temperature sensor 9, the pressure sensor, the temperature sensor, the heating device, the electric control valve, the cooler and the water pump are all connected with the control core, and the running state of each component is controlled through the control core.
Aiming at the problem of large volume of the particle catcher at present, the thickness of the wall surface of the filter surface of the open channel can be adjusted, so that a deposition layer is reduced, and the back pressure is reduced; and meanwhile, the number of filtration times is increased through the cooperation of the open channel and the closed channel. The air regulating device is additionally arranged behind the mass flowmeter, the heating device is arranged behind the air regulating device, the heating device can use the existing heating mode (such as electric heating and the like), the air pumping device is connected behind the heating device, the air inlet of the regeneration section of the miniature DPF main body is connected behind the air pumping device, and the sleeve-shaped cooling structure is arranged on the regeneration section of the DPF main body.
According to the application, the filter body with multiple times of filtration and smaller pore diameter is selected, so that the volume of the DPF main body can be effectively reduced, meanwhile, the air pumping device is arranged between the heating device and the air inlet of the DPF main body regeneration section 702, the air pressure can be effectively improved, the reduction of filtration efficiency due to accumulation of particulate matters and blocking of pore diameter can be prevented, the condition of increasing oil consumption can be further caused, the high flow rate of exhaust can be ensured, the problem of high exhaust resistance in the case of small pore diameter can be overcome, the system volume can be obviously reduced on the basis of the Chinese patent with the patent number ZL201721037931.4, and the cooling effect can be further ensured by matching with the cooling device in the sleeving form. If the exhaust resistance is too high, a large amount of particulate matter accumulates, which increases engine fuel consumption.
The small-volume DPF main body structure reduces the filtering area due to the reduction of the volume, so that the filtering times are increased, the exhaust resistance is increased due to the reduction of the microporous pores of the filtering body, and the flow is increased by adding the air pumping device. As the DPF is more easily blocked by the particulate matters after the volume is reduced, the pumping device and the heating device are added, so that the particulate matters are treated as timely as possible without accumulation, the regeneration capacity of the DPF is enhanced, and the efficiency of the filter body is maintained.
The system uses the air regulating device in the vehicle, takes the air pipeline of the vehicle as an air source, reduces the use of an air bottle, can further reduce the volume of the system, realizes reasonable control of the air inflow through the cooperation of the one-way valve, the air extractor and the electric control valve, and enables the DPF regeneration main body to regenerate under the state of higher oxygen content.
The air bottle, the air extractor, the air pumping device, the cooler, the thermostat and the heating device are all available commercially, but can be designed by self and have proper size and proper power. The thermostat can be heated or cooled to bring the air in the air tank to a suitable temperature. The pumping device can also maintain the flow rate of the DPF control core in a state of highest filtering efficiency under the control of the control core.
The DPF regeneration control system of the application has the working procedures that:
the temperature sensor located at the inlet of the regeneration section of the DPF main body detects the temperature of exhaust gas entering the regeneration section of the DPF main body, the temperature sensor transmits collected data to the control center through the data acquisition card, the control center analyzes the working condition of the diesel engine, whether heating and oxygenation are needed or not is analyzed, if so, the control center controls the opening of the electric control valve to open the air bottle to perform oxygenation on exhaust gas, and the heating device is opened to perform heating. Meanwhile, a temperature sensor on the cooling water pipe detects whether the temperature exceeds a limit value, if so, the water pump is started to cool the regeneration section of the DPF main body, a temperature sensor at the outlet of the regeneration section of the DPF main body detects the final exhaust temperature, whether the cooling effect of the DPF cooling device reaches the expected value or not is detected, if not, the water pump is started to increase the flow rate, and the refrigerating effect is enhanced. The pressure sensor detects the inlet and outlet pressure of the regeneration section of the DPF main body, data are transmitted to the control center, the regeneration state is analyzed, if the regeneration is completed, the oxygen supply is stopped, the heat supply is stopped, and the pumping is stopped.
Analyzing the working condition of the diesel engine and the temperature of the regeneration section of the DPF main body, and if heating and oxygenation are needed, controlling the electric control valve and the heating device by the control core to heat and oxygenate the exhaust. Before the tail gas reaches the regeneration section of the DPF main body, air is added into the DPF main body through the air regulating device, and under the work of the flow measuring device, the oxygen concentration can be accurately controlled, so that the high oxygen content is achieved during DPF regeneration, and the DPF regeneration can be accelerated. However, as the regeneration combustion is carried out in a state of higher oxygen content, the temperature of the DPF can be rapidly increased along with the rise of the oxygen concentration, and the cooling device is additionally arranged at the periphery of the regeneration section of the DPF main body, the working temperature of the DPF can be ensured to be lower than the damage temperature of the DPF, and meanwhile, the temperature inside the regeneration section of the DPF main body is acquired in real time through the temperature sensor in the regeneration section of the DPF main body, so that the DPF can be ensured to work at a proper temperature and under high working efficiency. The application reduces the filtering volume, increases and decreases the filtering times, and selects smaller micropore holes to cause the particles to block micropores.
According to the application, relevant experimental data can be obtained through a laboratory device, and corresponding filtering times and micropore diameters are selected according to the filtering structure of the DPF main body in the application for different vehicle bodies, and the filtering speed still needs to be maintained in the existing state and cannot be reduced, and the specific reduced size of each vehicle type needs to be obtained through experiments in the laboratory device, so that the effective use of the vehicle-mounted device can be realized.
Although embodiments of the present device have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the application system, the scope of which is defined in the appended claims and their equivalents.
The application is applicable to the prior art where it is not described.
Claims (3)
1. The miniaturized DPF system with the heat management comprises a mass flowmeter, an air regulating device, a heating device, a control core, a DPF main body regeneration section and a cooling device, wherein the mass flowmeter is arranged on a diesel engine exhaust pipeline, the air regulating device and the heating device are sequentially arranged on the diesel engine exhaust pipeline behind the mass flowmeter,
the system also comprises a pumping device, wherein the heating device is connected with an air inlet of the regeneration section of the DPF main body after passing through the pumping device, and a DPF cooling device is arranged outside the regeneration section of the DPF main body; the DPF main body regeneration section, the cooling device, the air pumping device, the air regulating device, the mass flowmeter and the heating device are all connected with the control core, and the control core controls the running state of each component;
the air regulating device is a laboratory device or a vehicle-mounted device;
the DPF cooling device adopts a 'water-cooling cylinder sleeve' structure and comprises a cooling water cavity, a cooling water tank, a water pump, a cooler and a temperature sensor, wherein the cooling water cavity is wrapped outside a DPF main body regeneration section, namely, the cooling water cavity is sleeved on the DPF main body regeneration section, cooling liquid is filled in the cooling water cavity, an insulation layer is arranged on the outer surface of the cooling water cavity, the water outlet pipeline of the cooling water tank is connected with the water pump again, and the water inlet of the cooling water tank is connected with the cooler; a temperature sensor is arranged at the water inlet of the cooling water tank;
the filter body of the DPF main body comprises an open channel with a baffle plate arranged in the middle of openings at two ends and a closed channel blocked at two ends; the partition plate divides the open channel into two spaces, the closed channel is provided with a filter cavity, and the two spaces of the filter cavity cross the open channel; the plurality of closed channels are arranged around the open channel along the length direction by taking the open channel as a center, and the wall surfaces of the open channel are all filter surfaces;
the open channel is rectangular, four sides of the rectangle are respectively connected with a closed channel along the length direction, and the closed channel and the open channel are arranged at intervals in the top view of the filter body;
the laboratory device comprises a flow control device, an electric control valve, an air bottle, a one-way valve, an air extractor, a thermostat and a pressure sensor, wherein the air bottle is filled with air, the thermostat is arranged outside the air bottle, the temperature in the air bottle is controlled through the thermostat, the opening of the air bottle is controlled by the one-way valve, the outlet of the flow control device is connected with the electric control valve, and the inlet of the flow control device is connected with the exhaust port of the diesel engine; the thermostat is installed outside the air tank.
2. The miniaturized DPF system with thermal management according to claim 1, wherein the on-board device includes a flow control device, an electric control valve, a thermostat, a check valve, an air pump, and a pressure sensor for detecting pressure, the pressure sensor, the air pump, and the check valve are all connected to the control core, the thermostat is installed on the air pipe, the electric control valve is installed behind the thermostat pipe, the flow control device is connected behind the electric control valve, and the diesel exhaust port is connected behind the flow control device.
3. The miniaturized DPF system with thermal management according to claim 1, wherein the pore size of the filter surface is 6 to 10 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546919.5A CN109339907B (en) | 2018-12-18 | 2018-12-18 | Miniaturized DPF system with thermal management |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546919.5A CN109339907B (en) | 2018-12-18 | 2018-12-18 | Miniaturized DPF system with thermal management |
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| CN109339907A CN109339907A (en) | 2019-02-15 |
| CN109339907B true CN109339907B (en) | 2023-09-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110030071B (en) * | 2019-04-12 | 2021-05-25 | 江苏大学 | DPF regeneration system for optimizing thermal management and control method |
| CN110735690A (en) * | 2019-10-24 | 2020-01-31 | 凯龙高科技股份有限公司 | high-temperature maintenance device for electrically heated particle catcher |
| CN114352381A (en) * | 2021-12-31 | 2022-04-15 | 潍柴动力扬州柴油机有限责任公司 | Device for controlling temperature during DPF regeneration |
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