CN111720192A - Vehicle, control method and control device of particle catcher and storage medium - Google Patents
Vehicle, control method and control device of particle catcher and storage medium Download PDFInfo
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- CN111720192A CN111720192A CN201910218215.3A CN201910218215A CN111720192A CN 111720192 A CN111720192 A CN 111720192A CN 201910218215 A CN201910218215 A CN 201910218215A CN 111720192 A CN111720192 A CN 111720192A
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- voltage
- particle
- preset
- state
- change amplitude
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention is applicable to the technical field of vehicle control, and provides a vehicle, a control method and a control device of a particle catcher and a storage medium. According to the invention, the first voltage drop of the particle catcher of the vehicle in the state when the particle catcher is not used and the second voltage drop of the particle catcher in the state when the particle amount captured by the particle catcher reaches the target value when the vehicle is used are obtained, the voltage change amplitude of the particle catcher in the initial state and the preset state is calculated according to the first voltage drop and the second voltage drop, and then the voltage change amplitude is compared with the preset voltage change amplitude, if the voltage change amplitude is smaller than the preset voltage change amplitude, the second voltage drop is increased until the voltage change amplitude is not smaller than the preset voltage change amplitude, so that the particles on the particle catcher are cleaned, and a separate pressure sensor is not required to be arranged during cleaning, so that the durability of the particle catcher is improved while the manufacturing cost, the maintenance cost, the after-sale risk and the difficulty are reduced.
Description
Technical Field
The invention belongs to the technical field of vehicle control, and particularly relates to a vehicle, a control method and a control device of a particle catcher and a storage medium.
Background
In recent years, as the living standard of people rises, vehicles have been widely applied to the life and work of people as a transportation tool, and as the vehicles are popularized, the environmental problems caused by vehicle exhaust are increasingly serious, so that the regulation of vehicle exhaust emission is more strict.
At present, in order to solve the problem of exhaust emission of vehicles, the prior art mainly captures carbon particles which are not sufficiently combusted by adding a particle trap in an exhaust system of a vehicle, and then heats the particle trap to combust the carbon particles. Specifically, in the prior art, two pressure sensors are respectively installed at the front end and the rear end of the particle catcher, and the heating of the particle catcher is controlled according to the pressure difference between the two pressure sensors.
Although the method can burn and decompose carbon particles in vehicle exhaust, the method needs two pressure sensors, is high in cost, and the pressure sensors are easy to damage, so that the particle trap cannot be accurately controlled to work, and the reliability is low; in addition, pressure sensors are difficult to replace, which increases after-market risks and maintenance costs.
Therefore, it is necessary to provide a technical solution to solve the above technical problems.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a vehicle, a method and a device for controlling a particulate trap, and a storage medium, which can solve the problems of high cost, low reliability, high after-sales risk, and high maintenance cost of the existing vehicle exhaust treatment method.
A first aspect of an embodiment of the present invention provides a method of controlling a particle trap, the method comprising:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
A second aspect of an embodiment of the present invention provides a control device for a particle trap, wherein the particle trap is provided with a power input electrode and a power output electrode, the control device is connected to the power input electrode and the power output electrode of the particle trap, and the control device includes:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
the calculation module is used for calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and the increasing module is used for increasing the second voltage drop if the voltage change amplitude is smaller than a preset voltage change amplitude until the voltage change amplitude is not smaller than the preset voltage change amplitude.
A third aspect of embodiments of the present invention provides a control device for a particle trap, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
A fourth aspect of an embodiment of the invention provides a vehicle comprising a control device of the particle trap of the second aspect or a control device of the particle trap of the third aspect.
A fifth aspect of embodiments of the present invention provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: according to the invention, the first voltage drop of the particle catcher of the vehicle in the state when the particle catcher is not used and the second voltage drop of the particle catcher in the state when the particle amount captured by the particle catcher reaches the target value when the vehicle is used are obtained, the voltage change amplitude of the particle catcher in the initial state and the preset state is calculated according to the first voltage drop and the second voltage drop, and then the voltage change amplitude is compared with the preset voltage change amplitude, if the voltage change amplitude is smaller than the preset voltage change amplitude, the second voltage drop is increased until the voltage change amplitude is not smaller than the preset voltage change amplitude, so that the particles on the particle catcher are cleaned, and a separate pressure sensor is not required to be arranged during cleaning, so that the durability of the particle catcher is improved while the manufacturing cost, the maintenance cost, the after-sale risk and the difficulty are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart illustrating a method for controlling a particle trap according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a control device of a particle catcher according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a particle trap according to a third embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of a method for controlling a particle trap according to an embodiment of the present invention. As shown in fig. 1, the method for controlling the particle catcher may include the steps of:
step S11: acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value.
In the embodiment of the invention, because the vehicle is not fueled when the vehicle is not used, and no exhaust gas is generated, and carbon particles generated by insufficient fuel combustion are not on the particle catcher of the vehicle, the initial state of the particle catcher mentioned in the embodiment is the state that no carbon particles are attached to the particle catcher when the vehicle is not used.
When the vehicle is in use, the vehicle needs to provide driving power through fuel, in the fuel process of the vehicle, a certain amount of carbon particles are generated by the vehicle due to insufficient fuel, the carbon particles on the particle catcher can be attached to a certain degree along with the increase of the use frequency of the vehicle, and when the carbon particles attached to the particle catcher reach a certain degree, namely a target value is reached, the particle catcher of the vehicle is in a preset state, and the carbon particles on the particle catcher need to be removed.
It should be noted that, in the embodiment of the present invention, the preset state of the particulate trap of the vehicle may be characterized by the following states or parameters, for example, the power torque of the vehicle engine at a specific rotation speed cannot meet the normal use requirement, and the state of the particulate trap of the vehicle every time the vehicle travels a specific mileage; the normal use requirements include, but are not limited to, no energy for acceleration, no energy for climbing, etc., and the specific mileage can be set as needed, that is, the specific mileage can be calibrated according to different engines, vehicle compliance, environmental conditions, etc., and is preferably within 100km in this embodiment.
Further, as an embodiment of the present invention, the obtaining the first pressure drop of the particulate trap of the vehicle in the initial state in the step S11 includes:
when the particle trap is in the initial state, inputting a first voltage to the particle trap, and acquiring a first voltage drop of the particle trap in the initial state according to the first voltage.
In the embodiment of the present invention, when the particle trap of the vehicle is changed from the initial state to the preset state, since the carbon particles attached to the particle trap in the preset state affect the use of the vehicle, in order to improve the performance of the vehicle, the carbon particles attached to the particle trap need to be removed, so that a first pressure drop of the particle trap in the initial state needs to be obtained first.
Specifically, when the particle trap is in the initial state, the particle trap may be energized based on a voltage provided by the power source to input a first voltage to the particle trap. The particle trap has certain internal resistance, so that the input first voltage can generate certain voltage drop on the particle trap, and the voltage drop is the first voltage drop of the obtained particle trap in the initial state; in this embodiment, after the first pressure drop of the particle trap in the initial state is obtained, the power supply to the particle trap is stopped.
Further, as an embodiment of the present invention, obtaining a first voltage drop of the particle trap in the initial state according to the first voltage comprises:
acquiring a first output voltage output by the particle catcher after the first voltage is input in the initial state;
and acquiring a first voltage drop of the particle trap in the initial state according to the difference value of the first output voltage and the first voltage.
In the embodiment of the invention, after the first voltage is input to the particle catcher in the initial state, because the particle catcher has a certain internal resistance, the output voltage of the particle catcher is also changed compared with the input first voltage, so that the first output voltage output after the first voltage is input to the particle catcher in the initial state can be obtained, and the first voltage drop of the particle catcher in the initial state can be further obtained according to the difference value of the first output voltage and the first voltage.
Specifically, the first pressure drop of the particle trap in the initial state can be obtained by the following formula: Δ Vn ═ V1-V2n | ═ Ic × Rn; where V1 is the voltage value of the first voltage input to the particle trap in the initial state, V2n is the voltage value of the first output voltage output to the particle trap in the initial state, Ic is the current value when the first voltage is input to the particle trap in the initial state, Rn is the internal resistance of the particle trap in the initial state, and Δ Vn is the value of the first voltage drop of the particle trap in the initial state.
Further, since the carbon particles attached to the particle trap in the preset state affect the use of the vehicle and reduce the performance of the vehicle, the carbon particles attached to the particle trap need to be removed, and after a first pressure drop of the particle trap in the initial state is obtained, a second pressure drop of the particle trap in the preset state needs to be obtained.
Specifically, as an embodiment of the present invention, the step of obtaining the second pressure drop of the particulate trap of the vehicle in the preset state in the step S11 includes:
and when the particle catcher is in the preset state, inputting a second voltage to the particle catcher, and acquiring a second voltage drop of the particle catcher in the preset state according to the second voltage.
In particular, when the particle trap is in a predetermined state, the particle trap may be energized with a voltage provided by the power source to input a second voltage to the particle trap. Because the particle trap has certain internal resistance and the resistance of the particle trap after being electrified can be changed due to the carbon particles captured by the particle trap, certain voltage drop can be generated on the particle trap by the input second voltage, and the voltage drop is the second voltage drop of the obtained particle trap in the initial state; it should be noted that, in this embodiment, after the second pressure drop of the particle trap in the preset state is obtained, the power supply to the particle trap is stopped.
Further, as an embodiment of the present invention, obtaining the second voltage drop of the particle trap in the preset state according to the second voltage includes:
acquiring a second output voltage output by the particle catcher after the second voltage is input in the preset state;
and acquiring a second voltage drop of the particle trap in the preset state according to the difference value of the second output voltage and the second voltage.
In the embodiment of the invention, after the second voltage is input to the particle trap in the preset state, because the particle trap has certain internal resistance when carbon particles adhere to the particle trap, the output voltage of the particle trap is also changed compared with the input second voltage, so that the second voltage drop of the particle trap in the preset state can be obtained by obtaining the second output voltage output after the second voltage is input to the particle trap in the preset state, and further according to the difference value between the second output voltage and the second voltage.
Specifically, the second pressure drop of the particulate trap in the preset state may be obtained by the following formula: Δ Vo ═ V2-V2o | ═ Io × Ro; wherein V2 is a voltage value of the second voltage inputted to the particle trap in the preset state, V2o is a voltage value of the second output voltage outputted to the particle trap in the preset state, Io is a current value when the second voltage is inputted to the particle trap in the preset state, Ro is an internal resistance of the particle trap in the preset state, and Δ Vo is a value of the second voltage drop of the particle trap in the preset state.
In this embodiment, according to the characteristic that the resistance values of the particle catcher of the vehicle are different between the unused state and the state of using the particle catcher to a certain extent, the control method of the particle catcher provided by the invention inputs the first voltage to the particle catcher in the initial state, obtains the first voltage drop of the particle catcher in the initial state according to the first voltage, inputs the second voltage to the particle catcher in the preset state, obtains the second voltage drop of the particle catcher in the preset state according to the second voltage, and further knows the carbon particle attachment degree of the particle catcher through the first voltage drop and the second voltage drop, so that a pressure sensor is not required to be arranged, the development cost of the whole vehicle is reduced, the difficulty caused by replacing the pressure sensor is avoided, and the maintenance risk and the maintenance cost caused by the fault of the pressure sensor are avoided.
Step S12: and calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop.
In the embodiment of the invention, the particle trap acquires carbon particles generated by insufficient combustion of an engine, and the conductivity and the adhesiveness of the carbon particles change the resistance of the particle trap, so that the voltage drop is changed, namely the more carbon particles are captured by the particle trap, the more carbon powder can be electrified, the lower the body temperature of the particle trap is, the smaller the resistance of the particle trap is, and the smaller the resistance is, the smaller the voltage drop of the particle trap is, so that after a first voltage drop of the particle trap in an initial state and a second voltage drop of the particle trap in a preset state are acquired, the voltage change amplitude of the particle trap in two states can be calculated according to the first voltage drop and the second voltage drop.
Specifically, since no carbon particles are attached to the particle trap in the initial state, the voltage drop of the particle trap in the initial state can be used as a reference, and the voltage change amplitude of the particle trap in the initial state and the preset state can be calculated according to the formula a ═ Δ Vo- Δ Vn |/Δ Vn; wherein a is a voltage change amplitude of the particle trap in an initial state and a preset state, Δ Vo is a second voltage drop of the particle trap in the preset state, and Δ Vn is a first voltage drop of the particle trap in the initial state.
In this embodiment, since the pressure drop of the particle trap in the initial state is not changed, the pressure drop of the particle trap in the initial state is used as a reference, and the voltage change amplitude of the particle trap in the two states is calculated according to the pressure drop of the particle trap in the initial state and the pressure drop of the particle trap in the preset state, so that the reference standard is unique and accurate when the control method of the particle trap provided by the embodiment of the invention is used for removing carbon particles on the particle trap, and the accuracy in the control process of the particle trap is improved.
Step S13: and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
In the embodiment of the present invention, the preset voltage change amplitude is calibrated according to different engine displacement and capturing capability of the particle trap, that is, the preset voltage change amplitude is a difference between a voltage drop across the particle trap and a voltage drop across the particle trap in an initial state when an engine power torque cannot meet a normal use requirement or when an exhaust back pressure increases by more than ten percent (referred to a preset state) when a whole vehicle engine is calibrated, and the difference can be represented by a formula a1 ═ Δ Vb- Δ Vn |/Δ Vn, where a1 is the preset voltage change amplitude of the particle trap in the initial state and the reference preset state, Δ Vn is a first voltage drop of the particle trap in the initial state, and Δ Vb is a voltage drop of the particle trap in the reference preset state.
Because the voltage drop of the particle trap changes with the increase of the adhering amount of the carbon particles, after the voltage change amplitude a of the particle trap in the initial state and the preset state is obtained, the voltage change amplitude a can be compared with the preset voltage change amplitude a1, if the voltage change amplitude a is not smaller than the preset voltage amplitude a1, it indicates that carbon particle removal is not required for the particle trap, and if the voltage change amplitude a is smaller than the preset voltage amplitude a1, it indicates that carbon particle removal is required for the particle trap, that is, the second voltage drop Δ Vo is increased, so that the voltage change amplitude is not smaller than the preset voltage change amplitude a 1.
Specifically, as an embodiment of the present invention, increasing the second voltage drop in step S13 until the voltage change amplitude is not smaller than the preset voltage change amplitude includes:
increasing the second voltage, and continuously inputting the increased second voltage to the particle trap in the preset state within a preset time to increase the second voltage drop;
recalculating a voltage change amplitude according to the first voltage drop and the increased second voltage drop;
if the recalculated voltage change amplitude is smaller than the preset voltage change amplitude, increasing the second voltage again, and continuously inputting the second increased voltage to the particle catcher in the preset state within preset time;
and if the recalculated voltage change amplitude is not smaller than the preset voltage change amplitude, stopping electrifying the particle catcher.
In the embodiment of the invention, the preset time is a time value obtained by calibrating according to the capturing capacity, the heating value, the input voltage and the exhaust gas air-fuel ratio of the particle catcher.
When the voltage change amplitude a is smaller than the preset voltage change amplitude a1, the increased second voltage can be input to the particle trap at the moment, and the electrifying time is maintained, so that the carbon particles captured by the particle trap can be combusted.
Further, after the carbon particles on the particle trap are combusted, the amount of carbon particles attached to the particle trap is reduced, and the smaller the amount of carbon particles attached to the particle trap is, the lower the resistance of the particle trap is, and the larger the resistance of the particle trap is, the larger the voltage drop is, so that the voltage can be input to the particle trap again, the second voltage drop Δ Vo can be obtained again according to the voltage input again and the voltage output again by the particle trap, and the second voltage drop Δ Vo obtained before the obtained second voltage drop Δ Vo intersects is increased; it should be noted that, in the embodiment of the disclosure, the voltage newly input to the particle catcher may be the second voltage, or may be the increased second voltage, which is not limited herein, and the principle of obtaining the second voltage drop Δ Vo according to the voltage newly input and the voltage newly output by the particle catcher is the same as the principle of obtaining the second voltage drop Δ Vo in step S11, which may specifically refer to the description of step S11, and is not described herein again.
When the second voltage drop is increased, recalculating the voltage change amplitude a according to the increased second voltage drop Δ Vo and the first voltage drop Δ Vn, comparing the recalculated voltage change amplitude a with a preset voltage change amplitude a1, if the recalculated voltage change amplitude a is not less than the preset voltage change amplitude a1, indicating that carbon particle removal on the particle trap reaches the standard, stopping electrifying the particle trap at the moment, if the recalculated voltage change amplitude a is less than the preset voltage change amplitude a1, indicating that carbon particle removal on the particle trap does not reach the standard, and needing to be removed again, at the moment, continuously increasing the second voltage, and continuously inputting the second voltage after being increased again to the particle trap in the preset state within the preset time so as to increase the second voltage drop; it should be noted that, the specific process of increasing the second voltage drop by increasing the second voltage and continuously inputting the second voltage increased again to the particle trap in the preset state within the preset time may refer to the foregoing related description, and details are not repeated herein.
In the embodiment, the invention obtains the first pressure drop of the state of the particle catcher when the particle catcher of the vehicle is not used and the second pressure drop of the state of the particle catcher when the vehicle is used and the amount of the particles caught by the particle catcher reaches the target value, and calculating the voltage change amplitude of the particle catcher in the initial state and the preset state according to the first voltage drop and the second voltage drop, further comparing the voltage variation amplitude with a preset voltage variation amplitude, if the voltage variation amplitude is smaller than the preset voltage variation amplitude, increasing the second voltage drop until the voltage change amplitude is not less than the preset voltage change amplitude, so as to remove the particles on the particle catcher, and an independent pressure sensor is not required to be arranged during cleaning, so that the durability of the particle catcher is improved while the manufacturing cost, the maintenance cost, the after-sale risk and the difficulty are reduced.
Fig. 2 is a schematic block diagram of a control device 2 of a particle trap according to a second embodiment of the present invention. The control device 2 of the particle catcher provided in the embodiment of the present invention includes modules for executing the steps in the embodiment corresponding to fig. 1, and please refer to fig. 1 and the related description in the embodiment corresponding to the fig. 1 for details, which are not repeated herein. The control device 2 of the particle trap according to an embodiment of the present invention comprises an obtaining module 21, a calculating module 22 and an increasing module 23.
Firstly, in the embodiment of the present invention, a power input terminal 4 and a power output terminal 5 are provided on the particle catcher 3, the power input terminal 4 and the power output terminal 5 are connected with the power supply 1 through the control device 2 of the particle catcher, so that the control device 2 of the particle catcher inputs the voltage provided by the power supply 1 to the particle catcher 2 through the power input terminal 4, and the control device 2 of the particle catcher can obtain the output voltage of the particle catcher 3 through the power output terminal 5; in the embodiment of the present invention, the power supply 1 may be implemented by a battery device such as a storage battery or a lithium battery, and the Control device 2 of the particle catcher may be implemented by an Electronic Control Unit (ECU) in the vehicle.
Further, the obtaining module 21 is configured to obtain a first pressure drop of a particle trap of a vehicle in an initial state and a second pressure drop of the particle trap in a preset state; the preset initial state is the state of the particle catcher when the vehicle is not used, and the preset state is the state of the particle catcher when the amount of particles caught by the particle catcher reaches the target value when the vehicle is used.
And the calculating module 22 is used for calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop.
And the increasing module 23 is configured to increase the second voltage drop if the voltage change amplitude is smaller than the preset voltage change amplitude until the voltage change amplitude is not smaller than the preset voltage change amplitude.
Further, the obtaining module 21 is specifically configured to input a first voltage to the particle trap when the particle trap is in the initial state, and obtain a first voltage drop of the particle trap in the initial state according to the first voltage.
Further, the obtaining module 21 is specifically configured to obtain a first output voltage output after the particle trap is input with the first voltage in an initial state; and acquiring a first voltage drop of the particle trap in the initial state according to the difference value of the first output voltage and the first voltage.
Further, the obtaining module 21 is further specifically configured to input a second voltage to the particle trap when the particle trap is in the preset state, and obtain a second voltage drop of the particle trap in the preset state according to the second voltage.
Further, the obtaining module 21 is further specifically configured to obtain a second output voltage output by the particle trap after the second voltage is input in the preset state; and acquiring a second voltage drop of the particle trap in a preset state according to the difference value of the second output voltage and the second voltage.
Further, the increasing module 23 is specifically configured to increase the second voltage, and continuously input the increased second voltage to the particle trap in the preset state within a preset time, so as to increase the second voltage drop; recalculating the voltage change amplitude according to the first voltage drop and the increased second voltage drop; if the recalculated voltage change amplitude is smaller than the preset voltage change amplitude, the second voltage is increased again, and the second voltage after the second voltage is increased again is continuously input to the particle catcher in the preset state within the preset time; and if the recalculated voltage change amplitude is not smaller than the preset voltage change amplitude, stopping electrifying the particle catcher.
In the present embodiment, the control device 2 of the particle trap obtains the first pressure drop of the state of the particle trap of the vehicle when the particle trap is not used and the second pressure drop of the state of the amount of particles caught by the particle trap when the vehicle is used, and calculating the voltage change amplitude of the particle catcher in the initial state and the preset state according to the first voltage drop and the second voltage drop, further comparing the voltage variation amplitude with a preset voltage variation amplitude, if the voltage variation amplitude is smaller than the preset voltage variation amplitude, increasing the second voltage drop until the voltage change amplitude is not less than the preset voltage change amplitude, so as to remove the particles on the particle catcher, and an independent pressure sensor is not required to be arranged during cleaning, so that the durability of the particle catcher is improved while the manufacturing cost, the maintenance cost, the after-sale risk and the difficulty are reduced.
Fig. 3 is a schematic view of a control device 3 of a particle catcher according to a third embodiment of the present invention. As shown in fig. 3, the control device 3 of the particle catcher of this embodiment comprises: a processor 30, a memory 31 and a computer program 32, such as a program for a method of controlling a particle trap, stored in said memory 31 and executable on said processor 30. The processor 30, when executing the computer program 32, implements the steps in the above-described embodiments of the method of controlling a respective particle trap, such as the steps 11 to 13 shown in fig. 1. Alternatively, the processor 30, when executing the computer program 32, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 21 to 23 shown in fig. 2.
Illustratively, the computer program 32 may be partitioned into one or more modules/units that are stored in the memory 31 and executed by the processor 30 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 32 in the control device 3 of the particle trap. For example, the computer program 32 may be divided into an acquisition module, a calculation module, and an augmentation module (virtual module in the device), each module having the following specific functions:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap reaches a target value when the vehicle is in use.
And the calculation module is used for calculating the voltage change amplitude of the particle catcher in the initial state and the preset state according to the first voltage drop and the second voltage drop.
And the increasing module is used for increasing the second voltage drop if the voltage change amplitude is smaller than the preset voltage change amplitude until the voltage change amplitude is not smaller than the preset voltage change amplitude.
Further, the obtaining module is specifically configured to input a first voltage to the particle trap when the particle trap is in the initial state, and obtain a first voltage drop of the particle trap in the initial state according to the first voltage.
Further, the obtaining module is specifically configured to obtain a first output voltage output by the particle trap after the first voltage is input in an initial state; and acquiring a first voltage drop of the particle trap in the initial state according to the difference value of the first output voltage and the first voltage.
Further, the obtaining module is specifically configured to input a second voltage to the particle catcher when the particle catcher is in the preset state, and obtain a second voltage drop of the particle catcher in the preset state according to the second voltage.
Further, the obtaining module is specifically configured to obtain a second output voltage output by the particle trap after the second voltage is input in a preset state; and acquiring a second voltage drop of the particle trap in a preset state according to the difference value of the second output voltage and the second voltage.
Further, the increasing module is specifically configured to increase the second voltage, and continuously input the increased second voltage to the particle trap in the preset state within a preset time, so as to increase a second voltage drop; recalculating the voltage change amplitude according to the first voltage drop and the increased second voltage drop; if the recalculated voltage change amplitude is smaller than the preset voltage change amplitude, the second voltage is increased again, and the second voltage after the second voltage is increased again is continuously input to the particle catcher in the preset state within the preset time; and if the recalculated voltage change amplitude is not smaller than the preset voltage change amplitude, stopping electrifying the particle catcher.
The control means 3 of the particle catcher can be a variety of processors or can be a control module inside a processor. The control means 3 of the particle catcher may comprise, but is not limited to, a processor 30, a memory 31. It will be appreciated by a person skilled in the art that fig. 3 is only an example of a control device 3 for a particle trap and does not constitute a limitation of the control device 3 for a particle trap, and that it may comprise more or less components than shown, or some components in combination, or different components, e.g. the control device 3 for a particle trap may also comprise input-output devices, network access devices, buses, etc.
The Processor 30 may be a Micro Control Unit (MCU), a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 31 may be an internal memory unit of the control device 3 of the particle catcher, for example a hard disk or a memory of the control device 3 of the particle catcher. The memory 31 may also be an external memory device of the control device 3 of the particle catcher, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like provided on the control device 3 of the particle catcher.
Further, the memory 31 may also comprise both an internal memory unit and an external memory device of the control device 3 of the particle trap. The memory 31 serves for storing the computer program and other programs and data required by the control device 3 of the particle trap. The memory 31 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Further, as an embodiment of the invention, the invention also discloses a vehicle comprising a control device of the particle catcher. It should be noted that, since the control device of the particle catcher provided by the embodiment of the present invention is the same as the control device 2 or 3 of the particle catcher shown in fig. 2 to 3, the detailed operation principle of the control device of the particle catcher in the vehicle provided by the embodiment of the present invention can refer to the foregoing detailed description about fig. 2 to 3, and will not be repeated herein.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method of controlling a particle trap, the method comprising:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
2. The control method of claim 1, wherein said obtaining a first pressure drop of a particulate trap of a vehicle at an initial state comprises:
when the particle trap is in the initial state, inputting a first voltage to the particle trap, and acquiring a first voltage drop of the particle trap in the initial state according to the first voltage.
3. The control method of claim 2, wherein said deriving a first voltage drop of the particle trap at the initial state from the first voltage comprises:
acquiring a first output voltage output by the particle catcher after the first voltage is input in the initial state;
and acquiring a first voltage drop of the particle trap in the initial state according to the difference value of the first output voltage and the first voltage.
4. The control method of claim 1, wherein said obtaining a second pressure drop of the particulate trap at a preset state comprises:
and when the particle catcher is in the preset state, inputting a second voltage to the particle catcher, and acquiring a second voltage drop of the particle catcher in the preset state according to the second voltage.
5. The control method of claim 4, wherein said deriving a second voltage drop of the particle trap at the preset state from the second voltage comprises:
acquiring a second output voltage output by the particle catcher after the second voltage is input in the preset state;
and acquiring a second voltage drop of the particle trap in the preset state according to the difference value of the second output voltage and the second voltage.
6. The control method according to claim 4 or 5, wherein the increasing the second voltage drop until the voltage change magnitude is not less than the preset voltage change magnitude comprises:
increasing the second voltage, and continuously inputting the increased second voltage to the particle trap in the preset state within a preset time to increase the second voltage drop;
recalculating a voltage change amplitude according to the first voltage drop and the increased second voltage drop;
if the recalculated voltage change amplitude is smaller than the preset voltage change amplitude, increasing the second voltage again, and continuously inputting the second increased voltage to the particle catcher in the preset state within preset time;
and if the recalculated voltage change amplitude is not smaller than the preset voltage change amplitude, stopping electrifying the particle catcher.
7. A control device of a particle catcher is characterized in that a power input electrode and a power output electrode are arranged on the particle catcher, the control device is connected with the power input electrode and the power output electrode of the particle catcher, and the control device comprises:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
the calculation module is used for calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and the increasing module is used for increasing the second voltage drop if the voltage change amplitude is smaller than a preset voltage change amplitude until the voltage change amplitude is not smaller than the preset voltage change amplitude.
8. A control device for a particle trap, comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor, when executing said computer program, carries out the steps of:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
9. A vehicle, characterized in that it comprises a control device of the particle trap according to claim 7 or 8.
10. A computer-readable storage medium storing a computer program, the computer program when executed by a processor implementing the steps of:
acquiring a first pressure drop of a particle catcher of a vehicle in an initial state and a second pressure drop of the particle catcher in a preset state; wherein the initial state is a state of the particle trap when the vehicle is not in use, and the preset state is a state in which an amount of particles captured by the particle trap when the vehicle is in use reaches a target value;
calculating the voltage change amplitude of the particle trap in the initial state and the preset state according to the first voltage drop and the second voltage drop;
and if the voltage change amplitude is smaller than a preset voltage change amplitude, increasing the second voltage drop until the voltage change amplitude is not smaller than the preset voltage change amplitude.
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