阅读说明：本技术 一种车辆、颗粒捕集器的控制方法与控制装置、存储介质 (Vehicle, control method and control device of particle catcher and storage medium ) 是由 黄兴来 骆洪燕 李薛 孙静 曾志新 肖龙曦 于 2019-03-21 设计创作，主要内容包括：本发明适用于车辆控制技术领域,提供了一种车辆、颗粒捕集器的控制方法与控制装置、存储介质。本发明通过获取车辆的颗粒捕集器在未被使用时颗粒捕集器的状态的第一压降以及在车辆被使用时颗粒捕集器捕捉的颗粒量达到目标值的状态下的第二压降,并根据第一压降和第二压降计算颗粒捕集器在初始状态和预设状态时的电压变化幅值,进而将电压变化幅值与预设电压变化幅值进行比较,若电压变化幅值小于预设电压变化幅值,则增大第二压降,直至电压变化幅值不小于预设电压变化幅值,以此对颗粒捕集器上的颗粒进行清除处理,并且在清理时无需设置单独的压力传感器,降低了制造成本、维修成本、售后风险以及困难度的同时提升了颗粒捕集器的耐久性。(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.)

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.

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.