GB2605070A - GPF oxygen pump auxiliary regeneration device and method for coupled bipolar charging and coagulation system - Google Patents

GPF oxygen pump auxiliary regeneration device and method for coupled bipolar charging and coagulation system Download PDF

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Publication number
GB2605070A
GB2605070A GB2207811.7A GB202207811A GB2605070A GB 2605070 A GB2605070 A GB 2605070A GB 202207811 A GB202207811 A GB 202207811A GB 2605070 A GB2605070 A GB 2605070A
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United Kingdom
Prior art keywords
gasoline
oxygen pump
particulate filter
oxygen
particulate matter
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GB2207811.7A
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GB202207811D0 (en
GB2605070B (en
Inventor
Tang Dong
Han Yubin
Xu Guoliang
Liu Sheng
Ju Zhixuan
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Jiangsu University
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Jiangsu University
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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
    • 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
    • F01N3/027—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 electric or magnetic heating means
    • 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, e.g. for catalytic activity
    • 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
    • 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
    • F01N3/01—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust by means of electric or electrostatic separators
    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/101—Three-way catalysts
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/32—Arrangements for supply of additional air using air pump
    • F01N3/326—Engine-driven air pumps
    • 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
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/04—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric, e.g. electrostatic, device other than a heater
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • 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
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/025—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting O2, e.g. lambda sensors
    • 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
    • F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Materials Engineering (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

An oxygen pump auxiliary regeneration device and method for a gasoline particulate filter (GPF) coupled with a bipolar charging and coagulation system are provided. The device includes a gasoline particulate filter (3), a charging device, an electric coagulation device, and an oxygen pump regeneration device. The oxygen pump regeneration device is provided with an oxygen pump electrolyte sheet (18) and an electric heating wire (16). The charging device pre-charges particulate matter in exhaust gas from a gasoline engine, the electric coagulation device makes the particulate matter collide and coagulate, the electric heating wire (16) heats the particulate matter, and the oxygen pump electrolyte sheet (18) performs oxygen supplementation while heating is performed. The rotation speed of a filter body (22) can also be changed by means of a stepper motor (5), thereby achieving the purpose of adjusting the regeneration efficiency. The device can take both the capture efficiency and the regeneration efficiency of the particulate matter into consideration, cause no damage to the particulate filter, and meanwhile, cause no waste of resources.

Description

GPF OXYGEN PUMP AUXILIARY REGENERATION DEVICE AND METHOD FOR COUPLED BIPOLAR CHARGING AND COAGULATION
SYSTEM
Technical Field
The present invention belongs to the technical field of regeneration of particulate matter in exhaust gas, and specifically relates to an oxygen pump auxiliary regeneration device and method for a gasoline particulate filter (GPF) coupled with a bipolar charging and coagulation system.
Background
As a main influential factor of air pollution, particulate matter does great harm to human health. Environmental regulations have set increasingly strict limits on particulate matter. In China VI Regulation, limit requirements on the mass and particle number of particulate matter for gasoline vehicles have been added, and test conditions have also changed from New European Driving Cycle (NEDC) to Worldwide Harmonized Light Vehicle Test Cycle (WLTC). The research shows that the particle number of an in-cylinder direct injection gasoline engine is larger than that of a port fuel injection gasoline engine; accordingly, the mass and particle number of particulate matter of WLTC significantly rise as compared with those of NEDC. The particle number has become an important challenge for the design and development of an in-cylinder direct injection gasoline vehicle. One of the feasible solutions is to add a gasoline particulate filter (GPF) to the vehicle. The research shows that the GPF can effectively reduce the amount of particulate matter of the in-cylinder direct injection gasoline vehicle, so that the particle number is lower than a regulatory limit, but a regeneration problem exists.
A conventional particulate filter needs to reduce the pore diameter, porosity, and so on in order to improve the capture efficiency of fine particulate matter. This inevitably causes a rise in exhaust back pressure of a gasoline engine and an increase in power loss, resulting in performance degradation of the gasoline engine. With more and more strict emission regulations, research with the aim of controlling the amount of micro-nano particulate matter has become increasingly important. GPF carriers with the same structural parameters have a much higher capture efficiency for accumulation mode particles than for nucleation mode particles with small particle size. The bipolar charging and coagulation technology increases a coagulation coefficient between particles by particle charging, so that particles with small particle size are coagulated into particles with large particle size to improve the capture efficiency of GPF. After the particulate filter works for a period of time, since deposited particulate matter increases, exhaust back pressure rises, and thus a filter body of the particulate filter fails and fuel economy degrades. In this case, the particulate filter needs to be regenerated. There are two solutions to this problem: one is to lower the temperature required for oxidation of particulate matter during engine operation; the other is to make the deposited particulate matter reach the oxidation temperature through an auxiliary system. The first approach applies to a passive regeneration system, and the second approach applies to an active regeneration system. Generally speaking, active regeneration consumes about 2% to 3% fuel, while the consumption may be reduced by 80% through passive regeneration. It is of great significance for the safe and effective regeneration of the GPF to properly select the regeneration technology according to the structure and material of the GPF as well as use characteristics and use conditions of the gasoline engine.
In the existing GPF capture and regeneration technology, particulate matter is filtered and captured through a filter body, and when the particulate matter accumulates to a certain extent to cause a continuous decline in capture efficiency, particulate matter accumulation is removed through the regeneration technology. The disadvantage is that the capture efficiency and regeneration efficiency are not high enough, causing filter damage and resource waste.
Summary
In view of the deficiencies in the prior art, the present invention provides an oxygen pump auxiliary regeneration device and method for a GPF coupled with a bipolar charging and coagulation system, so as to improve both the capture efficiency and the regeneration efficiency of a GPF.
The present invention achieves the aforementioned technical objective by the following technical means An oxygen pump auxiliary regeneration device for a GPF coupled with a bipolar charging and coagulation system includes a gasoline particulate filter, a charging device, an electric coagulation device, and an oxygen pump regeneration device, wherein the charging device includes a stainless steel wire and a heating coil, the stainless steel wire is supported within a cylindrical shell, and one end of the stainless steel wire is connected to a high-voltage direct-current power supply; the heating coil is wound on the outside of the cylindrical shell; one end of the cylindrical shell is in communication with an exhaust end of the gasoline particulate filter, and the other end of the cylindrical shell is in communication with a gasoline engine; the electric coagulation device includes a shell and a high-voltage alternating-current power supply, the shell is disposed on two ends of the gasoline particulate filter, and the shell is connected to the high-voltage alternating-current power supply; the oxygen pump regeneration device includes an oxygen sensor, particulate matter sensors, a high-frequency ceramic body, a filter body, an electric heating wire, and an oxygen pump electrolyte sheet; the oxygen sensor is disposed at an intake end of the gasoline particulate filter, the filter body is fixed on an intermediate shaft of the gasoline particulate filter, the high-frequency ceramic body is filled between a top portion of the filter body and a housing of the gasoline particulate filter, the electric heating wire is disposed in the high-frequency ceramic body in a penetrating manner, the electric heating wire wraps one end of the oxygen pump electrolyte sheet, the other end of the oxygen pump electrolyte sheet passes through an oxygen conducting tube and is connected to an oxygen pump power supply, and the oxygen conducting tube is in communication with a chamber at the intake end of the gasoline particulate filter; the intake end and the exhaust end of the gasoline particulate filter are provided with the particulate matter sensors, respectively; and the high-voltage direct-current power supply, the oxygen pump power supply, the oxygen sensor, and the particulate matter sensors are all connected to an electronic control unit (ECU).
In the aforementioned technical solution, the oxygen pump auxiliary regeneration device further includes a fuel meter and a power meter, wherein the fuel meter is configured for obtaining fuel consumption status of the gasoline engine, the power meter is configured for obtaining power of the entire device, working conditions of the gasoline engine are determined according to the fuel consumption status and the power of the device, and compared with working conditions in the ECU, and oxygen concentrations under different working conditions are determined.
In the aforementioned technical solution, the oxygen pump auxiliary regeneration device further includes a stepper motor connected to the intermediate shaft of the gasoline particulate filter, wherein the stepper motor is connected to the ECU and configured for driving the filter body to rotate.
In the aforementioned technical solution, the oxygen pump auxiliary regeneration device further includes a flow sensor and a bypass valve, wherein the flow sensor is configured for detecting flow of exhaust gas from the gasoline engine and transmitting the flow to the ECU, and when the flow of the exhaust gas from the gasoline engine is larger than a set threshold, the ECU controls the bypass valve to open.
In the aforementioned technical solution, the heating coil is connected to a first heating power supply.
In the aforementioned technical solution, the electric heating wire is connected to a second heating power supply.
An oxygen pump auxiliary regeneration method for a GPF coupled with a bipolar charging and coagulation system specifically includes: obtaining in real time, by particulate matter sensors, deposition status of particulate matter inside a gasoline particulate filter, and when an ECU detects that a capture efficiency of the particulate filter starts to decrease, controlling, by the ECU, an electric heating wire to work and heat the particulate matter; during combustion of the particulate matter, obtaining in real time, by an oxygen sensor, oxygen concentrations of exhaust gas under different working conditions of the gasoline engine, and when the oxygen concentration is smaller than a set value, an oxygen pump electrolyte sheet working to produce high-temperature oxygen for regeneration with the particulate matter inside a filter body.
Further, during the regeneration, the particulate matter sensors obtain in real time deposition status of particulate matter inside the gasoline particulate filter, and a rotation speed of a stepper motor is adjusted according to the capture efficiency, so as to adjust a rotation speed of the filter body.
Further, when the capture efficiency is stable over a longer period of time, the electric heating wire and the oxygen pump electrolyte sheet are turned off.
The beneficial effects of the present invention are the following.
(I) In the present invention, first, a charging device is used to pre-charge particulate matter in exhaust gas from a gasoline engine, and then, an electric coagulation device is used to make the particulate matter collide and coagulate, so as to increase the particle size and improve the capture efficiency.
(2) In the present invention, an oxygen pump electrolyte sheet and an electric heating wire are combined to perform oxygen supplementation while heating exhaust particulate matter, so as to enhance the exhaust oxygen concentration and better implement the regeneration process (3) In the present invention, a hollow filter is used and connected to a stepper motor, to make gas flow in radially and flow out axially, so that the charging and coagulation process can be performed simultaneously with the oxygen pump regeneration process; meanwhile, according to the deposition status of particulate matter inside a gasoline particulate filter, the rotation speed of the stepper motor is adjusted according to the capture efficiency, so as to change the rotation speed of the filter body, thereby achieving the purpose of adjusting the regeneration efficiency.
Brief Description of the Drawings
FIG. 1 is a schematic structural view of an oxygen pump auxiliary regeneration device for a GPF coupled with a bipolar charging and coagulation system in the present invention.
FIG. 2 is schematic structural views of a gasoline particulate filter in the present invention, where FTG. 2(a) is a front view of the gasoline particulate filter in the present invention, and FIG. 2(b) is a side view of the gasoline particulate filter in the present invention.
In the drawings: 1-power meter, 2-oxygen sensor, 3-gasoline particulate filter, 4-high-voltage alternating-current power supply, 5-stepper motor, 6-high-voltage direct-current power supply, 7-first heating power supply, 8-flow sensor, 9-fuel meter, 10-particulate matter sensor, 11-bypass valve, 12-ceramic heating coil, 13-stainless steel wire, 14-second heating power supply, 15-oxygen pump power supply, 16-electric heating wire, 17-oxygen conducting tube, 18-oxygen pump electrolyte sheet, 19-cylindrical shell, 20-shell, 2I-high-frequency ceramic body, 22-filter body.
Detailed Description of the Embodiments
The present invention is further illustrated below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.
As shown in FIG. 1, an oxygen pump auxiliary regeneration device for a GPF coupled with a bipolar charging and coagulation system includes a gasoline particulate filter 3, a charging device, an electric coagulation device, and an oxygen pump regeneration device.
The charging device consists of a cylindrical shell 19, a stainless steel wire 13, a heating coil 12, a high-voltage direct-current power supply 6, and a first heating power supply 7; one end of the cylindrical shell 19 is in communication with an exhaust end of the gasoline particulate filter 3, and the other end of the cylindrical shell 19 is in communication with a gasoline engine; the stainless steel wire 13 is supported at a central position within the cylindrical shell 19, one end of the stainless steel wire 13 is connected to the high-voltage direct-current power supply 6, and the high-voltage direct-current power supply 6 is connected to the cylindrical shell 19; the heating coil 12 is wound on the outside of the cylindrical shell 19, and the heating coil 12 is connected to the first heating power supply 7. The cylindrical shell 19 adopts a stainless steel material, and the material of the heating coil 12 is ceramics. The cylindrical shell 19 is connected to the ground.
The electric coagulation device consists of a shell 20 and a high-voltage alternating-current power supply 4, and the shell 20 is connected to the high-voltage alternating-current power supply 4 by means of a wire; the shell 20 is disposed on two ends of the gasoline particulate filter 3, the shell 20 adopts a stainless steel material, and an insulating material is wrapped on the outside of the shell 20.
As shown in FIGs. 2(a) and 2(b), the oxygen pump regeneration device consists of an oxygen pump power supply 15, a second heating power supply 14, an oxygen sensor 2, particulate matter sensors 10, a flow sensor 8, a stepper motor 5, a fuel meter 9, a power meter 1, a bypass valve 11, a high-frequency ceramic body 21, a filter body 22, an electric heating wire 16, an oxygen pump electrolyte sheet 18, and an oxygen conducting tube 17. The oxygen sensor 2 and the power meter 1 are disposed at an intake end of the gasoline particulate filter 3; the filter body 22 is fixed on an intermediate shaft of the gasoline particulate filter 3, the high-frequency ceramic body 21 is filled between a top portion of the filter body 22 and a housing of the gasoline particulate filter 3, and the filter body 22 is hollow cylinder-shaped; the electric heating wire 16 is disposed in the high-frequency ceramic body 21 in a penetrating manner, and the electric heating wire 16 is connected to the second heating power supply 14; one end of the oxygen pump electrolyte sheet 18 is wrapped in the electric heating wire 16, the other end of the oxygen pump electrolyte sheet 18 passes through the oxygen conducting tube 17 and is connected to the oxygen pump power supply 15, and the oxygen conducting tube 17 is in communication with a chamber at the intake end of the gasoline particulate filter 3; the intake end and the exhaust end of the gasoline particulate filter 3 are provided with the particulate matter sensors 10, respectively; the intermediate shaft of the gasoline particulate filter 3 is connected to an output shaft of the stepper motor 5, so as to drive the filter body 22 to rotate; the bypass valve 11 is located at the exhaust end of the gasoline particulate filter 3, the flow sensor 8 is disposed on the cylindrical shell 19 close to the gasoline engine, and the gasoline engine is further provided with the fuel meter 9.
The high-voltage direct-current power supply 6, the high-voltage alternating-current power supply 4, the oxygen pump power supply 15, the first heating power supply 7, the second heating power supply 14, the oxygen sensor 2, the particulate matter sensors 10, the flow sensor 8, the stepper motor 5, the bypass valve 11, the fuel meter 9, and the power meter 1 are all connected to an ECU.
In this embodiment, the stainless steel wire 13 has a length of 500 mm and a diameter of 1.5 mm; exhaust gas discharged from the gasoline engine flows in radially and is discharged axially.
The fuel meter 9 is configured for obtaining fuel consumption status of the gasoline engine, the power meter 1 is configured for obtaining power of the entire device, working conditions of the gasoline engine are determined according to the fuel consumption status and the power of the device, and compared with working conditions stored in the ECU, and oxygen concentrations under different working conditions are determined; this process is performed before active regeneration. The flow sensor 8 is configured for detecting flow of exhaust gas from the gasoline engine and transmitting the flow to the ECU, and when the flow of the exhaust gas from the gasoline engine is excessively large (a threshold of the flow of the exhaust gas is set in the ECU), the ECU controls the bypass valve 11 to open.
A method for the aforementioned gasoline particulate filter to perform charging and coagulation to capture particulate matter is the following: the stainless steel wire 13 connected to the high-voltage direct-current power supply 6 is used to pre-charge particulate matter in exhaust gas from gasoline engine, and the heating coil 12 is used to heat exhaust gas after pre-charging, so as to remove excess water vapor, the exhaust gas enters a coagulation electric field in the upper part of the gasoline particulate filter 3, and the coagulation electric field enhances relative movement between the particulate matter, and facilities collision and coagulation between the particulate matter, thereby completing the capture process.
A method for the aforementioned active regeneration device for the gasoline particulate filter to perform active regeneration is the following: the particulate matter sensors 10 are used to obtain in real time deposition status of particulate matter inside the gasoline particulate filter 3 and transmit the deposition status to the ECU, when the ECU detects that the capture efficiency of the particulate filter starts to decrease, the ECU controls the second heating power supply 14 to make the electric heating wire 16 work, the electric heating wire 16 and the high-frequency ceramic body 21 heat the filter body 22 to reach an ignition temperature of the deposited particulate matter, so that the particulate matter starts to combust; during combustion, the oxygen sensor 2 is used to obtain in real time oxygen concentrations of exhaust gas under different working conditions of the gasoline engine, and feed back data of the exhaust oxygen concentration to the ECU, when the oxygen concentration is insufficient (smaller than a set value in the ECU), the ECU controls the oxygen pump power supply 15 to supply power to the oxygen pump electrolyte sheet 18, the oxygen pump electrolyte sheet 18 works to produce high-temperature oxygen, which enters the gasoline particulate filter 3 through the oxygen conducting tube 17 to enhance the oxygen concentration of the regeneration gas flow, for regeneration with the particulate matter inside the filter body 22. During the regeneration, the particulate matter sensors 10 obtain in real time deposition status of particulate matter inside the gasoline particulate filter 3, a rotation speed of the stepper motor 5 is adjusted according to the capture efficiency, and the rotation speed of the stepper motor 5 is adjusted by the ECU, so as to change a rotation speed of the filter body 22, thereby achieving the purpose of adjusting the regeneration efficiency; when the capture efficiency is stable over a longer period of time, the ECU turns off the second heating power supply 14 and the oxygen pump power supply 15, so that the electric heating wire 16 and the oxygen pump electrolyte sheet 18 stop working.
In the aforementioned process, the deposition status of the particulate matter and the rotation speed of the stepper motor 5 are determined through calibration tests and stored in the ECU in advance.
The described embodiments are preferred embodiments of the present invention, but the present invention is not limited to the aforementioned embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention shall fall within the protection scope of the present invention,

Claims (9)

  1. Claims What is claimed is: 1. An oxygen pump auxiliary regeneration device for a gasoline particulate filter coupled with a bipolar charging and coagulation system, characterized by comprising a gasoline particulate filter (3), a charging device, an electric coagulation device, and an oxygen pump regeneration device, wherein the charging device comprises a stainless steel wire (13) and a heating coil (12), the stainless steel wire (13) is supported within a cylindrical shell (19), and one end of the stainless steel wire (13) is connected to a high-voltage direct-current power supply (6); the heating coil (12) is wound on an outside of the cylindrical shell (19); one end of the cylindrical shell (19) is in communication with an exhaust end of the gasoline particulate filter (3), and the other end of the cylindrical shell (19) is in communication with a gasoline engine; the electric coagulation device comprises a shell (20) and a high-voltage alternating-current power supply (4), the shell (20) is disposed on two ends of the gasoline particulate filter (3), and the shell (20) is connected to the high-voltage alternating-current power supply (4); the oxygen pump regeneration device comprises an oxygen sensor (2), particulate matter sensors (10), a high-frequency ceramic body (21), a filter body (22), an electric heating wire (16), and an oxygen pump electrolyte sheet (18); the oxygen sensor (2) is disposed at an intake end of the gasoline particulate filter (3), the filter body (22) is fixed on an intermediate shaft of the gasoline particulate filter (3), the high-frequency ceramic body (21) is filled between a top portion of the filter body (22) and a housing of the gasoline particulate filter (3), the electric heating wire (16) is disposed in the high-frequency ceramic body (21) in a penetrating manner, the electric heating wire (16) wraps one end of the oxygen pump electrolyte sheet (18), the other end of' the oxygen pump electrolyte sheet (18) passes through an oxygen conducting tube (17) and is connected to an oxygen pump power supply (15), and the oxygen conducting tube (17) is in communication with a chamber at the intake end of the gasoline particulate filter (3); the intake end and the exhaust end of the gasoline particulate filter (3) are provided with the particulate matter sensors (10), respectively; and the high-voltage direct-current power supply (6), the oxygen pump power supply (15), the oxygen sensor (2), and the particulate matter sensors (10) are connected to an electronic control unit.
  2. 2. The oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to claim 1, characterized by further comprising a fuel meter (9) and a power meter (1), wherein the fuel meter (9) is configured for obtaining fuel consumption status of the gasoline engine, the power meter (1) is configured for obtaining power of the device, working conditions of the gasoline engine are determined according to the fuel consumption status and the power of the device, and compared with working conditions in the electronic control unit, and oxygen concentrations under different working conditions are determined.
  3. 3. The oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to claim 2, characterized by further comprising a stepper motor (5), wherein the stepper motor (5) is connected to the intermediate shaft of the gasoline particulate filter (3), the stepper motor (5) is connected to the electronic control unit and is configured for driving the filter body (22) to rotate.
  4. 4. The oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to claim 3, characterized by further comprising a flow sensor (8) and a bypass valve (11), wherein the flow sensor (8) is configured for detecting flow of exhaust gas from the gasoline engine and transmitting the flow to the electronic control unit, and when the flow of the exhaust gas from the gasoline engine is larger than a set threshold, the electronic control unit controls the bypass valve (11) to open.
  5. 5. The oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to claim 1, characterized in that the heating coil (12) is connected to a first heating power supply (7).
  6. 6. The oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to claim 1, characterized in that the electric heating wire (16) is connected to a second heating power supply (14).
  7. 7. A regeneration method using the oxygen pump auxiliary regeneration device for the gasoline particulate filter coupled with the bipolar charging and coagulation system according to any one of claims 1 to 6, characterized by comprising: obtaining in real time, by the particulate matter sensors (10), deposition status of particulate matter inside the gasoline particulate filter (3), when the electronic control unit detects that a capture efficiency of the gasoline particulate filter starts to decrease, controlling, by the electronic control unit, the electric heating wire (16) to work and heat the particulate matter; during combustion of the particulate matter, obtaining in real time, by the oxygen sensor (2), oxygen concentrations of exhaust gas under different working conditions of the gasoline engine, and when the oxygen concentration is smaller than a set value, the oxygen pump electrolyte sheet (18) working to produce high-temperature oxygen for regeneration with the particulate matter inside the filter body (22).
  8. 8. The regeneration method according to claim 7, characterized in that during the regeneration, the particulate matter sensors (10) obtain in real time the deposition status of the particulate matter inside the gasoline particulate filter (3), and a rotation speed of the stepper motor (5) is adjusted according to the capture efficiency, so as to adjust a rotation speed of the filter body (22).
  9. 9. The regeneration method according to claim 7, characterized in that when the capture efficiency is stable over a longer period of time, the electric heating wire (16) and the oxygen pump electrolyte sheet (18) are turned off.
GB2207811.7A 2020-06-08 2020-06-11 Oxygen pump auxiliary regeneration device and method for gasoline particulate filter coupled with bipolar charging and aggregation system Active GB2605070B (en)

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CN202010512445.3A CN111828135B (en) 2020-06-08 2020-06-08 GPF oxygen pump auxiliary regeneration device and method of coupled bipolar charge coagulation system
PCT/CN2020/095583 WO2021248407A1 (en) 2020-06-08 2020-06-11 Gpf oxygen pump auxiliary regeneration device and method for coupled bipolar charging and coagulation system

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CN112324545B (en) * 2020-10-29 2021-10-08 同济大学 DPF regeneration coupling control method
CN112879124A (en) * 2021-01-26 2021-06-01 东风汽车集团股份有限公司 Automobile exhaust particulate matter adsorption equipment
CN113847122B (en) * 2021-09-22 2022-09-16 奇瑞汽车股份有限公司 GPF regeneration control method and device for automobile and computer storage medium

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GB2605070B (en) 2023-05-10

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