A particle trap regeneration control method and device

Abstract

The present invention discloses a regeneration control method and device for a particle trap, the method comprising obtaining the temperature of the particle trap and the pressure difference between the front and rear ends to match the regeneration mode of the particle trap; adjusting the air flow of the particle trap according to the regeneration mode to trigger the particle trap to start regeneration, so as to efficiently remove particulate matter accumulated in the particle trap and extend the service life of the engine.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a regeneration control method and device for a particle trap. Background Art

[0002] With the increasing requirements for environmental protection, adding a particulate filter to the exhaust system of a car to reduce the emission of carbon particles during driving has become a standard feature of the car. However, after the particulate filter has been working for a certain period of time, the particles accumulated in the particulate filter will cause the filter element to become clogged, resulting in an increase in the exhaust back pressure of the car, thereby increasing the fuel consumption of the whole vehicle.

[0003] In order to solve the problem caused by the accumulation of particulate matter, the existing technical solution sets a timed carbon deposit removal program in the vehicle controller, and periodically adds oxygen to the particulate filter to control the particulate filter to regenerate according to the combustion of the accumulated carbon particulate matter by the oxygen. However, the above method cannot adapt to all driving conditions of the vehicle. When the vehicle is driving under low speed, low load and other working conditions, the exhaust temperature of the engine does not reach the temperature required for combustion, and cannot provide sufficient heat to support the regeneration of the particulate filter. At this time, due to the large amount of oxygen input into the particulate filter, the back pressure of the engine's exhaust system rises rapidly, the power decreases, and the safety of the engine is threatened. Furthermore, periodic carbon deposit removal not only frequently occupies the resources of the vehicle controller, but also cannot adapt to the current state of the particulate filter, and then performs useless carbon deposit removal process, resulting in waste of resources. Summary of the invention

[0004] In order to solve the above technical problems, the present invention discloses a regeneration control method and device for a particle trap, which are used to efficiently remove particulate matter accumulated in the particle trap and extend the service life of the engine.

[0005] In order to achieve the above object, the present invention discloses a regeneration control method for a particle trap, which is characterized by comprising:

[0006] Acquiring the temperature of the particulate trap and the pressure difference between the front and rear ends to match the regeneration mode of the particulate trap;

[0007] The air flow of the particulate trap is adjusted according to the regeneration mode to trigger the particulate trap to start regeneration.

[0008] The present invention discloses a regeneration control method for a particle trap. First, the temperature of the particle trap and the pressure difference between the front and rear ends are used to match the regeneration mode of the particle trap, so that the particle trap is timely and accurately regenerated through the pressure difference between the front and rear ends to avoid excessive accumulation of particulate matter. At the same time, the temperature of the particle trap is obtained to ensure that the particle trap has sufficient heat for regeneration, so as to avoid damage to the engine caused by regeneration failure. Secondly, after adaptively matching the corresponding regeneration mode according to the current state of the particle trap, the air flow of the particle trap is adjusted to trigger the particle trap to start regeneration, and then the adjusted air flow and the temperature are used to ensure sufficient combustion inside the particle trap, so that the particulate matter accumulated in the particle trap can be efficiently removed and the service life of the engine can be extended.

[0009] As a preferred example, obtaining the temperature and the pressure difference between the front and rear ends of the particle collector includes:

[0010] The air inlet pressure and the air outlet pressure of the particle collector are respectively collected to obtain the pressure difference between the front and rear ends of the particle collector;

[0011] The air inlet temperature of the particulate filter is collected.

[0012] The present invention uses the pressure difference between the front and rear ends of the particulate trap to accurately reflect the carbon load of the particulate trap itself, so as to adaptively determine the timing of regeneration of the particulate trap, thereby avoiding excessive accumulation of particulate matter and the waste of resources caused by periodic carbon deposit removal in the prior art. Furthermore, by collecting the air inlet temperature of the particulate trap, it is ensured that the particulate trap has sufficient heat for regeneration, thus avoiding damage to the engine caused by regeneration failure.

[0013] As a preferred example, the matching of the regeneration mode of the particle trap includes:

[0014] Comparing the front and rear end pressure difference with a preset pressure difference interval and comparing the air inlet temperature with a preset temperature value interval;

[0015] When the front and rear end pressure difference is within the pressure difference range and the air intake temperature is within the temperature value range, it is determined that the particulate trap is undergoing passive regeneration.

[0016] The present invention presets a pressure difference interval and a temperature interval to ensure that the particle trap is regenerated only when the state meets the set conditions, thereby reducing the probability of regeneration failure and reducing the resource occupancy rate.

[0017] As a preferred example, the step of adjusting the air flow of the particle collector includes:

[0018] When it is determined that the particulate trap is to be passively regenerated, obtaining an air flow value of an air inlet of the particulate trap;

[0019] Obtaining a target adjusted air flow rate of the particle trap according to the air flow rate value of the air inlet;

[0020] The air flow is adjusted according to the target to pump air to the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

[0021] The present invention adjusts the air flow of the particle trap to ensure that the particle trap uses the heat provided by the temperature and the adjusted air flow to perform sufficient combustion, thereby efficiently removing particulate matter accumulated inside the particle trap.

[0022] As a preferred example, the adjusting the air flow of the particle collector further includes:

[0023] When the particulate trap is pumped, real-time monitoring is performed to determine whether the temperature or the pressure difference between the front and rear ends of the particulate trap is within a preset range;

[0024] When the temperature is not within a preset temperature range or the front and rear end pressure difference is not within a preset pressure difference range, pumping air to the particulate trap is stopped to control the particulate trap to exit passive regeneration.

[0025] The present invention monitors the temperature of the particulate filter and the pressure difference between the front and rear ends in real time, so as to timely control the particulate filter to exit the regeneration state when the state of the particulate filter does not meet the regeneration requirements, thereby avoiding waste of resources and damage to the engine caused by excessive air input and extending the life of the engine.

[0026] On the other hand, the present invention also discloses a regeneration control device for a particle trap, comprising a control module, a sensor module and a regeneration module; wherein:

[0027] The sensor module is electrically connected to the control module, and is used to obtain the temperature and the front and rear end pressure difference of the particulate trap, and send the temperature and the front and rear end pressure difference to the control module, so that the control module matches the regeneration mode of the particulate trap according to the back pressure value and the temperature value;

[0028] The control module is electrically connected to the regeneration module and is used to control the regeneration module according to the regeneration mode so that the regeneration module adjusts the air flow of the particle trap and triggers the particle trap to start regeneration.

[0029] The present invention discloses a regeneration control device for a particle trap. First, a control module is set to control the regeneration process of the particle trap, which no longer occupies the resources of the vehicle controller, thereby avoiding interference with the operation of the engine. Furthermore, a sensor module is set to obtain the temperature of the particle trap and the pressure difference between the front and rear ends, so that the control module matches the corresponding regeneration mode according to the state of the particle trap, and then regenerates the particle trap in a timely and accurate manner through the pressure difference between the front and rear ends to avoid excessive accumulation of particulate matter. At the same time, the temperature of the particle trap is obtained to ensure that the particle trap has sufficient heat for regeneration, thereby avoiding damage to the engine caused by regeneration failure. Secondly, after adaptively matching the corresponding regeneration mode according to the current state of the particle trap, the regeneration module is controlled to adjust the air flow of the particle trap, thereby triggering the particle trap to start regeneration. The particle trap uses the adjusted air flow and the temperature to ensure sufficient combustion inside, which can efficiently remove the particulate matter accumulated in the particle trap and extend the service life of the engine.

[0030] As a preferred example, the sensor module includes a differential pressure sensor and a temperature sensor;

[0031] The pressure difference sensor is electrically connected to the control module, and is used to collect the air inlet pressure and the air outlet pressure of the particulate trap respectively, so as to obtain the front and rear end pressure difference of the particulate trap, and send the front and rear end pressure difference to the control module;

[0032] The temperature sensor is electrically connected to the control module, and is used for collecting the air inlet temperature of the particulate trap, and sending the air inlet temperature to the control module.

[0033] The present invention uses the pressure difference between the front and rear ends of the particulate trap to accurately reflect the carbon load of the particulate trap itself, so as to adaptively determine the timing of regeneration of the particulate trap, thereby avoiding excessive accumulation of particulate matter and the waste of resources caused by periodic carbon deposit removal in the prior art. Furthermore, by collecting the air inlet temperature of the particulate trap, it is ensured that the particulate trap has sufficient heat for regeneration, thus avoiding damage to the engine caused by regeneration failure.

[0034] As a preferred example, the control module matches the regeneration mode of the particulate trap according to the back pressure value and the temperature value, including:

[0035] The control module compares the front and rear end pressure difference with a preset pressure difference interval and compares the air inlet temperature with a preset temperature value interval;

[0036] When the front and rear end pressure difference is within the pressure difference range and the air intake temperature is within the temperature value range, it is determined that the particulate trap is undergoing passive regeneration.

[0037] The present invention presets a pressure difference interval and a temperature interval to ensure that the particle trap is regenerated only when the state meets the set conditions, thereby reducing the probability of regeneration failure and reducing the resource occupancy rate.

[0038] As a preferred example, the regeneration module includes an air pump, a throttle valve, and a first intake pipe and a second intake pipe; wherein the air pump is electrically connected to the control module; the throttle valve is electrically connected to the control module;

[0039] The air inlet of the first air inlet pipeline is connected to the air outlet of the air pump; the air outlet of the first air inlet pipeline is connected to the air inlet of the throttle valve;

[0040] The air inlet of the second air inlet pipeline is connected to the air outlet of the throttle valve; the air outlet of the second air inlet pipeline is connected to the air inlet of the particulate trap.

[0041] The present invention provides an air pump and an intake duct to input air into the particulate filter, and provides a throttle valve to adjust the intake flow in the intake duct, thereby ensuring the oxygen concentration in the particulate filter, so that the particulate filter can be fully burned to efficiently regenerate the particulate matter accumulated in the particulate filter.

[0042] As a preferred example, the controlling the regeneration module so that the regeneration module adjusts the air flow of the particle trap includes:

[0043] When determining that the particulate trap is to be passively regenerated, the control module obtains an air flow value of an air inlet of the particulate trap, and obtains a target adjusted air flow of the particulate trap according to the air flow value of the air inlet;

[0044] The control module controls the air pump and the throttle valve to open, and adjusts the opening of the throttle valve according to the target adjusted air flow to pump air into the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

[0045] The present invention starts the air pump to provide gas to the particulate filter to trigger the particulate filter to regenerate, and by adjusting the opening of the throttle valve, the concentration of oxygen in the particulate filter can be guaranteed to avoid the combustion of particulate matter being affected when the air flow is too small or too large, thereby ensuring the regeneration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1: is a flow chart of a regeneration control method for a particulate trap disclosed in an embodiment of the present invention;

[0047] Figure 2 : is a structural schematic diagram of a regeneration control device for a particulate trap disclosed in an embodiment of the present invention;

[0048] Figure 3 : is a structural schematic diagram of a regeneration control console rack disclosed in an embodiment of the present invention;

[0049] Figure 4 : A schematic diagram of a process for regeneration control of a particulate filter based on a test bench disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Embodiment 1

[0052] This embodiment discloses a regeneration control method for a particle trap. For the specific implementation process of the regeneration control method, please refer to Figure 1 , mainly including step 101 to step 102, the above steps are mainly:

[0053] Step 101: obtaining the temperature and the front and rear end pressure difference of the particulate trap to match the regeneration mode of the particulate trap;

[0054] Step 102: Adjust the air flow of the particulate trap according to the regeneration mode to trigger the particulate trap to start regeneration.

[0055] In certain implementations of this embodiment, in order to timely remove the particulate matter accumulated in the particulate trap, it is necessary to obtain the particulate matter load in the particulate trap in real time, so as to control the particulate trap to perform regeneration when the particulate matter load reaches a certain threshold. Specifically, in order to intuitively reflect the particulate matter accumulated in the particulate trap, the pressure difference between the front and rear ends of the particulate trap can be obtained. When the pressure difference reaches a certain threshold, it indicates that a certain amount of particulate matter has accumulated inside the particulate trap. When determining that the particulate matter needs to be regenerated, it is also necessary to determine that the particulate trap meets the regeneration conditions to avoid failure of the particulate trap regeneration and damage to the engine.

[0056] Preferably, in some implementations of this embodiment, the temperature of the particulate trap can be obtained to determine whether the particulate trap can be regenerated. Specifically, in the process of obtaining the temperature of the particulate trap and the pressure difference between the front and rear ends to match the regeneration mode in step 101, the following steps can be performed:

[0057] Step 1011: respectively collecting the air inlet pressure and the air outlet pressure of the particulate trap to obtain the pressure difference between the front and rear ends of the particulate trap; collecting the air inlet temperature of the particulate trap.

[0058] Step 1012: Compare the front and rear end pressure difference with a preset pressure difference range and compare the air intake temperature with a preset temperature value range; when the front and rear end pressure difference is within the pressure difference range and the air intake temperature is within the temperature value range, determine that the particulate filter is undergoing passive regeneration.

[0059] In certain implementations of this embodiment, step 1011 uses the pressure difference between the front and rear ends of the particulate trap to accurately reflect the carbon load of the particulate trap itself, so as to adaptively determine the timing of regeneration of the particulate trap, thereby avoiding excessive accumulation of particulate matter and waste of resources caused by periodic carbon deposit removal in the prior art. Furthermore, by collecting the air inlet temperature of the particulate trap, it is ensured that the particulate trap has sufficient heat for regeneration, thereby avoiding damage to the engine caused by regeneration failure.

[0060] Furthermore, step 1012 ensures that the particulate filter is regenerated only when the state meets the set conditions through the preset pressure difference interval and temperature interval, thereby reducing the probability of regeneration failure and the resource occupancy rate.

[0061] Further, after it is determined through steps 1011 and 1012 that the particulate filter meets the regeneration conditions, in order to improve the regeneration efficiency of the particulate filter, the air flow of the particulate filter can be adjusted based on the temperature required for combustion, thereby improving the regeneration efficiency. While improving the regeneration efficiency, it is also necessary to avoid the influence of too high or too low air flow on the regeneration. Specifically, step 102 can control the air flow of the particulate filter through the following steps.

[0062] Step 1021: when it is determined that the particulate trap is to be passively regenerated, obtaining an air flow value of an air inlet of the particulate trap;

[0063] Step 1022: obtaining a target adjusted air flow rate of the particulate trap according to the air flow rate value of the air inlet;

[0064] Step 1023: Adjust the air flow rate according to the target to pump air to the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

[0065] In certain implementations of this embodiment, steps 1021 to 1023 adjust the air flow of the particulate collector to ensure that the particulate collector uses the heat provided by the temperature and the adjusted air flow to perform sufficient combustion, thereby efficiently removing particulate matter accumulated inside the particulate collector.

[0066] Furthermore, as the particulate matter accumulated in the particulate trap will become less and less as the regeneration continues, and the temperature may also become lower, it is necessary to timely control the particulate trap to exit the regeneration state to avoid damage to the engine caused by regeneration failure. Specifically, while adjusting the air flow in step 102, the particulate trap is also controlled to exit passive regeneration in real time through the following steps:

[0067] Step 1024: When pumping air to the particle trap, monitor in real time whether the temperature or the pressure difference between the front and rear ends of the particle trap is within a preset range;

[0068] Step 1025: When the temperature is not within a preset temperature range or the front and rear end pressure difference is not within a preset pressure difference range, stop pumping air to the particulate trap to control the particulate trap to exit passive regeneration.

[0069] In certain implementations of this embodiment, steps 1024 to 1025 monitor the temperature of the particulate filter and the pressure difference between the front and rear ends in real time, so as to promptly control the particulate filter to exit the regeneration state when the state of the particulate filter does not meet the regeneration requirements, thereby avoiding waste of resources and damage to the engine due to excessive air input and extending the life of the engine.

[0070] On the other hand, this embodiment also discloses a regeneration control device for a particle trap. Specifically, the specific structure of the regeneration control device is shown in FIG. Figure 2 , mainly includes a control module 201, a sensor module 202 and a regeneration module 203.

[0071] like Figure 2 As shown, the sensor module 202 is electrically connected to the control module 201, and is used to obtain the temperature and the front and rear end pressure difference of the particulate trap, and send the temperature and the front and rear end pressure difference to the control module 201, so that the control module 201 matches the regeneration mode of the particulate trap according to the back pressure value and the temperature value;

[0072] The control module 201 is electrically connected to the regeneration module 203 and is used to control the regeneration module 203 according to the regeneration mode, so that the regeneration module 203 adjusts the air flow of the particle trap and triggers the particle trap to start regeneration.

[0073] In certain implementations of this embodiment, in order to Figure 2 The regeneration control device shown performs regeneration control of the particulate trap, and a differential pressure sensor and a temperature sensor may be provided in the sensor module 202 .

[0074] The differential pressure sensor is electrically connected to the control module 201, and is used to collect the air inlet pressure and the air outlet pressure of the particulate trap, respectively, to obtain the pressure difference between the front and rear ends of the particulate trap, and send the pressure difference between the front and rear ends to the control module 201. The differential pressure sensor is set to accurately reflect the carbon load of the particulate trap itself according to the pressure difference between the front and rear ends of the particulate trap in a timely manner, and then adaptively determine the timing of regeneration of the particulate trap, so as to avoid excessive accumulation of particulate matter and avoid waste of resources caused by periodic carbon deposit removal in the prior art.

[0075] The temperature sensor is electrically connected to the control module 201, and is used for collecting the air intake temperature of the particulate filter, and sending the air intake temperature to the control module 201. By setting the temperature sensor to collect the air intake temperature of the particulate filter, it is ensured that the particulate filter has sufficient heat for regeneration, so as to avoid damage to the engine caused by regeneration failure.

[0076] Further, after the temperature sensor and the pressure difference sensor obtain the temperature and the front and rear pressure difference of the particulate trap and send them to the control module 201, based on the fact that the control module 201 is used to control the particulate trap to regenerate, it can be known that the control module 201 performs the following steps after obtaining the temperature and the front and rear pressure difference:

[0077] Step S1: the control module 201 compares the front and rear end pressure difference with a preset pressure difference interval and compares the air inlet temperature with a preset temperature value interval;

[0078] Step S2: When the front and rear end pressure difference is within the pressure difference interval and the air inlet temperature is within the temperature value interval, it is determined that the particulate trap is to be passively regenerated.

[0079] In steps S1 and S2, the regeneration process of the particulate filter is controlled based on the control module 201 to ensure the regeneration efficiency. To this end, the control module 201 ensures that the state of the particulate filter is regenerated only when it meets the set conditions through the preset pressure difference interval and temperature interval, thereby reducing the probability of regeneration failure and reducing the resource occupancy rate.

[0080] Further, after the control module 201 determines that the particulate filter can be regenerated, the air flow of the particulate filter is adjusted by controlling the regeneration module 203 to control the particulate filter to start regeneration. In some implementations of this embodiment, the regeneration module 203 includes an air pump, a throttle valve, and a first intake pipe and a second intake pipe; wherein the air pump is electrically connected to the control module; the throttle valve is electrically connected to the control module; the air inlet of the first intake pipe is connected to the air outlet of the air pump; the air outlet of the first intake pipe is connected to the air inlet of the throttle valve; the air inlet of the second intake pipe is connected to the air outlet of the throttle valve; the air outlet of the second intake pipe is connected to the air inlet of the particulate filter.

[0081] Further, referring to the structural composition of the regeneration module 203, the steps of the control module 201 controlling the regeneration module 203 to adjust the air flow of the particle trap are:

[0082] Step S3: when determining that the particulate trap is to be passively regenerated, the control module 201 obtains an air flow value of an air inlet of the particulate trap, and obtains a target adjusted air flow of the particulate trap according to the air flow value of the air inlet;

[0083] Step S4: the control module 201 controls the air pump and the throttle valve to open, and adjusts the opening of the throttle valve according to the target adjusted air flow to pump air into the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

[0084] In this embodiment, the control module 201 provides gas to the particulate filter by turning on the air pump to trigger the regeneration of the particulate filter, and by adjusting the opening of the throttle valve, the concentration of oxygen in the particulate filter can be ensured to avoid the combustion of particulate matter when the air flow is too small or too large, thereby ensuring the regeneration efficiency.

[0085] In this embodiment, according to Figure 1 A regeneration control method for a particle trap is shown. Accordingly, this embodiment provides an electronic device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the following is implemented Figure 1A regeneration control method for a particle collector is shown. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The processor is the control center of the terminal, and various interfaces and lines are used to connect the various parts of the entire terminal. The memory may be used to store the computer program, and the processor implements various functions of the terminal by running or executing the computer program stored in the memory and calling the data stored in the memory. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory may include high-speed random access memory and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0086] Furthermore, this embodiment also provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the following Figure 1 A regeneration control method for a particulate filter is shown.

[0087] Among them, Figure 2If some modules in the regeneration control device of the particle collector shown are implemented in the form of software functional units and sold or used as independent products, the modules can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment method can also be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0088] Compared with the prior art, the particle trap regeneration control method, device, equipment and medium provided in this embodiment have the following beneficial effects:

[0089] This embodiment sets a control module to control the regeneration process of the particle trap, which no longer occupies the resources of the vehicle controller, thereby avoiding interference with the operation of the engine. Furthermore, a sensor module is set to obtain the temperature of the particle trap and the pressure difference between the front and rear ends, so that the control module matches the corresponding regeneration mode according to the state of the particle trap, and then regenerates the particle trap in a timely and accurate manner through the pressure difference between the front and rear ends to avoid excessive accumulation of particulate matter. At the same time, the temperature of the particle trap is obtained to ensure that the particle trap has sufficient heat for regeneration, thereby avoiding damage to the engine caused by regeneration failure. Secondly, after adaptively matching the corresponding regeneration mode according to the current state of the particle trap, the regeneration module is controlled to adjust the air flow of the particle trap, thereby triggering the particle trap to start regeneration. The particle trap uses the adjusted air flow and the temperature to ensure sufficient combustion inside, which can efficiently remove the particulate matter accumulated in the particle trap and extend the service life of the engine.

[0090] Embodiment 2

[0091] In the process of automobile manufacturing, matching engines with GPF (Gasoline Particulate Filter) or particulate traps has become a regular configuration for automobiles. During the engine test, the accumulation of particulate matter in the GPF causes the engine exhaust back pressure to increase rapidly, which in turn affects the engine test results. In this regard, during the engine test, it is necessary to timely control the GPF to regenerate in order to remove particulate matter. In this regard, the prior art uses technical means to adjust the air-fuel ratio to remove carbon deposits or remove the GPF carrier according to the test type to avoid the results of the engine test caused by the accumulation of particulate matter in the GPF.

[0092] Among them, the technical means of removing carbon deposits by adjusting the air-fuel ratio requires the use of INCA computers and communication equipment, which will cause a sharp increase in test costs, and the means of removing GPF is not suitable for most test conditions. In this regard, in order to solve the above technical problems, this embodiment provides a regeneration control console, which provides compressed air to the GPF to achieve regeneration of the GPF connected to the engine, thereby reducing the cost of the test and increasing the scope of application.

[0093] Specifically, when the test engine is placed on the regeneration control stand to control the regeneration of the particulate trap inside the engine through the regeneration control stand, the specific connection structure of the regeneration control stand, the engine and the particulate trap can refer to Figure 3 .like Figure 3 As shown, the test stand includes a compressed air pump 301 , an air flow valve 302 , a pressure difference sensor 303 , a temperature sensor 304 and a test stand controller 305 .

[0094] like Figure 3 As shown, the air pump 301, the air flow valve 302, the pressure difference sensor 303, and the temperature sensor 304 are respectively connected to the rack controller 305 by signal;

[0095] The air outlet of the air pump 301 is connected to the air inlet of the air flow valve 302;

[0096] The air outlet of the air flow valve 302 is connected to the air inlet of the particle trap.

[0097] Reference Figure 3 In order to timely control the regeneration of the particle trap, as Figure 3The test bench shown needs to obtain the state of the particulate trap in time to determine whether the particulate trap can be regenerated. Specifically, the differential pressure sensor 303 is deployed on the particulate trap to obtain the pressure difference between the front and rear ends of the particulate trap. A hole can be opened on the particulate trap, and then the particulate trap and the differential pressure sensor 303 are connected through a pipeline, and then the pressure of the front and rear ends of the particulate trap is collected through the pipeline, and the pressure is sent to the differential pressure sensor 303 to obtain the pressure difference.

[0098] Furthermore, if Figure 3 After the test bench has collected the corresponding pressure difference, in order to determine whether the particulate trap can be regenerated, it is also necessary to accurately and timely obtain the temperature of the particulate trap. Preferably, the temperature sensor 304 is deployed at the rear end of the exhaust manifold of the engine or the exhaust temperature of the pipeline at the front end of the particulate trap, so that the exhaust temperature is used as the temperature of the particulate trap. Preferably, the temperature sensor 304 can be installed through an opening to collect the exhaust temperature.

[0099] Referring to the connection arrangement between the differential pressure sensor 303 and the temperature sensor 304 and the particulate trap, the state information of the particulate trap is obtained, and then it is timely determined whether to control the particulate trap to regenerate.

[0100] After determining that the particulate trap is regenerated, if Figure 3 The bench shown adjusts the air flow of the particle trap to trigger the particle trap to start regeneration. In order to achieve the adjustment of the air flow. In some implementations of this embodiment, a compressed air pipeline is set in the bench as the air source pipeline of the bench, one end of the compressed air pipeline is connected to the air inlet of the particle trap, and the other end is connected to the outlet of the air pump 301, so that the compressed air in the air pump 301 is transported to the particle trap through the compressed air pipeline.

[0101] Furthermore, the air flow valve 302 is arranged in the compressed air pipeline along the air flow direction in the compressed air pipeline. The air flow valve 302 is a switch control valve in the compressed air pipeline and is not connected to the GPF. Preferably, in some embodiments, in order to control the air flow in the compressed air pipeline, the air flow valve 302 can use a two-position two-way solenoid valve to connect the signal with the bench controller 305, and then receive the control command sent by the bench controller 305. Among them, the signal of the solenoid valve is connected to the bench controller 305, and the bench controller 305 sends a signal to control the switch of the solenoid valve to determine the on-off of the compressed air pipeline and the corresponding air flow.

[0102] In passing Figure 3After the pressure difference sensor 303 obtains the pressure difference between the front and rear ends of the particle trap and the temperature sensor 304 obtains the temperature of the particle trap and sends it to the bench controller 305, the bench controller 305 executes the following steps: Figure 4 The regeneration control step shown is used to control the particle trap to regenerate. Specifically, the regeneration control step includes:

[0103] Step 401: The test bench controller obtains the front and rear end pressure difference sent by the pressure difference sensor and the temperature sent by the temperature sensor to determine whether the particulate filter meets the regeneration conditions.

[0104] In this embodiment, the steps mainly include: obtaining the front and rear end pressure difference of the particulate collector in real time through the pressure difference sensor and obtaining the temperature of the particulate collector in real time through the temperature sensor, and sending the temperature and the front and rear end pressure difference to the bench controller.

[0105] The test bench controller obtains the upper and lower limits of the back pressure of the engine under normal working conditions, and compares the front and rear end pressure difference with the upper and lower limits of the back pressure, and compares the temperature with the preset upper and lower limits of the temperature. The upper and lower limits of the temperature are determined according to the design of the engine and the heat required for combustion, and are preferably set between 600°C and 700°C.

[0106] When the front and rear end pressure difference is within the interval corresponding to the upper and lower limits of the back pressure and the temperature is within the interval corresponding to the upper and lower limits of the temperature, the bench controller determines that the particulate trap meets the regeneration condition.

[0107] Step 402: When the bench controller determines that the particulate trap meets the regeneration condition, the air pump and the air flow valve are turned on to trigger the particulate trap to start regeneration.

[0108] In this embodiment, this step mainly includes: the test bench controller sends a signal to control the opening of the first air flow valve, the second air flow valve, and the air pump to deliver the compressed air of the air pump to the front end of the particulate filter, so that the excess oxygen in the engine exhaust pipe participates in the combustion to burn the particulate matter accumulated in the particulate filter, thereby achieving regeneration.

[0109] Furthermore, in certain implementations of the present embodiment, in order to control the air flow rate of compressed air flowing into the particulate collector and avoid the air flow rate being too high or too low, a gas flow sensor may be arranged at the front end of the particulate collector to obtain the air flow value of the air inlet of the particulate collector through the gas flow sensor, and then adjust the opening of the air flow valve according to the air flow value of the air inlet, thereby pumping air into the particulate collector.

[0110] Step 403: The test bench controller monitors the temperature or the pressure difference between the front and rear ends of the particulate trap in real time to control the particulate trap to stop regenerating.

[0111] In this embodiment, the step mainly includes: when the particulate trap is pumped, the bench controller obtains in real time the temperature of the particulate trap sent by the temperature sensor or the front and rear end pressure difference of the particulate trap sent by the pressure difference sensor, and determines whether it is within a preset range;

[0112] When the temperature is not within the preset temperature range or the front and rear end pressure difference is not within the preset pressure difference range, the bench controller sends a signal to control the air flow valve and the air pump to close, stop pumping air to the particulate collector, and control the particulate collector to exit passive regeneration.

[0113] The present embodiment provides a regeneration control rack and a regeneration control method, which utilizes the compressed air resources in the rack, does not require additional pressurized oxygen-enriched air equipment, and reduces the complexity of the device. At the same time, the regeneration control of the particulate filter can be realized based on the rack controller, and no additional equipment, such as I NCA computers, software, 582 and other communication equipment, is required, which can reduce the cost of regeneration control. At the same time, when controlling the regeneration control of the particulate filter, the combustion is controlled at the end of the engine, and the control data of the engine vehicle controller does not need to be adjusted, the engine program operation is not interfered, and no shutdown processing is required, thereby improving the test efficiency.

[0114] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A regeneration control method for a particulate filter, characterized in that: include: Acquiring the temperature of the particulate trap and the pressure difference between the front and rear ends to match the regeneration mode of the particulate trap; The air flow of the particulate trap is adjusted according to the regeneration mode to trigger the particulate trap to start regeneration.

2. A particulate filter regeneration control method according to claim 1, characterized in that: The obtaining of the temperature and the front and rear end pressure difference of the particle collector includes: The air inlet pressure and the air outlet pressure of the particle collector are respectively collected to obtain the pressure difference between the front and rear ends of the particle collector; The air inlet temperature of the particulate filter is collected.

3. A particulate filter regeneration control method according to claim 2, characterized in that: The matching of the regeneration mode of the particulate trap includes: Comparing the front and rear end pressure difference with a preset pressure difference interval and comparing the air inlet temperature with a preset temperature value interval; When the front and rear end pressure difference is within the pressure difference range and the air intake temperature is within the temperature value range, it is determined that the particulate trap is undergoing passive regeneration.

4. A particulate filter regeneration control method according to claim 3, characterized in that: The step of adjusting the air flow of the particle collector comprises: When it is determined that the particulate trap is to be passively regenerated, obtaining an air flow value of an air inlet of the particulate trap; Obtaining a target adjusted air flow rate of the particle trap according to the air flow rate value of the air inlet; The air flow is adjusted according to the target to pump air to the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

5. A particulate filter regeneration control method according to claim 4, characterized in that: The step of adjusting the air flow of the particle trap further comprises: When the particulate trap is pumped, real-time monitoring is performed to determine whether the temperature or the pressure difference between the front and rear ends of the particulate trap is within a preset range; When the temperature is not within a preset temperature range or the front and rear end pressure difference is not within a preset pressure difference range, pumping air to the particulate trap is stopped to control the particulate trap to exit passive regeneration.

6. A regeneration control device for a particulate trap, characterized in that: It includes a control module, a sensor module and a regeneration module; wherein, The sensor module is electrically connected to the control module, and is used to obtain the temperature and the front and rear end pressure difference of the particulate trap, and send the temperature and the front and rear end pressure difference to the control module, so that the control module matches the regeneration mode of the particulate trap according to the back pressure value and the temperature value; The control module is electrically connected to the regeneration module and is used to control the regeneration module according to the regeneration mode so that the regeneration module adjusts the air flow of the particle trap and triggers the particle trap to start regeneration.

7. A regeneration control device for a particulate trap according to claim 6, characterized in that: The sensor module includes a differential pressure sensor and a temperature sensor; The pressure difference sensor is electrically connected to the control module, and is used to collect the air inlet pressure and the air outlet pressure of the particulate trap respectively, so as to obtain the front and rear end pressure difference of the particulate trap, and send the front and rear end pressure difference to the control module; The temperature sensor is electrically connected to the control module, and is used for collecting the air inlet temperature of the particulate trap, and sending the air inlet temperature to the control module.

8. A particulate filter regeneration control device according to claim 7, characterized in that: The control module matches the regeneration mode of the particulate trap according to the back pressure value and the temperature value, including: The control module compares the front and rear end pressure difference with a preset pressure difference interval and compares the air inlet temperature with a preset temperature value interval; When the front and rear end pressure difference is within the pressure difference range and the air intake temperature is within the temperature value range, it is determined that the particulate trap is undergoing passive regeneration.

9. A particulate filter regeneration control device according to claim 6, characterized in that: The regeneration module includes an air pump, a throttle valve, and a first intake pipeline and a second intake pipeline; wherein the air pump is electrically connected to the control module; the throttle valve is electrically connected to the control module; The air inlet of the first air inlet pipeline is connected to the air outlet of the air pump; the air outlet of the first air inlet pipeline is connected to the air inlet of the throttle valve; The air inlet of the second air inlet pipeline is connected to the air outlet of the throttle valve; the air outlet of the second air inlet pipeline is connected to the air inlet of the particulate trap.

10. A regeneration control device for a particulate trap according to any one of claims 8 to 9, characterized in that: The controlling the regeneration module so that the regeneration module adjusts the air flow of the particle trap includes: When determining that the particulate trap is to be passively regenerated, the control module obtains an air flow value of an air inlet of the particulate trap, and obtains a target adjusted air flow of the particulate trap according to the air flow value of the air inlet; The control module controls the air pump and the throttle valve to open, and adjusts the opening of the throttle valve according to the target adjusted air flow to pump air into the particulate trap, thereby triggering the particulate trap to start the passive regeneration.

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