CN116066217A - Particle control method and related device for vehicle tail gas - Google Patents

Particle control method and related device for vehicle tail gas Download PDF

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Publication number
CN116066217A
CN116066217A CN202310225370.4A CN202310225370A CN116066217A CN 116066217 A CN116066217 A CN 116066217A CN 202310225370 A CN202310225370 A CN 202310225370A CN 116066217 A CN116066217 A CN 116066217A
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China
Prior art keywords
control
current
control valve
opening
particulate matter
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Pending
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CN202310225370.4A
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Chinese (zh)
Inventor
马文晓
仲昆
李震
王冠亭
吕志华
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Priority to CN202310225370.4A priority Critical patent/CN116066217A/en
Publication of CN116066217A publication Critical patent/CN116066217A/en
Pending legal-status Critical Current

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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
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The embodiment of the application provides a particle control method and a related device for vehicle tail gas, wherein the method comprises the following steps: acquiring current operation condition data of a target vehicle; determining a corresponding particulate matter control strategy according to the current operation condition data; and controlling the opening and closing degrees of a first control valve and a second control valve according to a particulate matter control strategy, wherein the first control valve is used for controlling the opening and closing of a first exhaust pipeline after the TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline after the TWC, and a GPF (general purpose surface) is arranged in the second exhaust pipeline and used for capturing particulates. Through the scheme, the effective control of the particulate matter quantity of the vehicle tail gas can be realized under various working conditions.

Description

Particle control method and related device for vehicle tail gas
Technical Field
The application relates to the field of vehicles, in particular to a particle control method and a related device for vehicle tail gas.
Background
In order to protect the environment, a three-way catalytic converter (Three Way Catalyst, TWC) is usually disposed behind the engine of the vehicle in the related art, and the TWC can convert the exhaust gas (carbon monoxide C O, oxynitride nox, hydrocarbon H C, etc.) which is generated by burning fuel during the operation of the engine of the vehicle and causes the atmospheric pollution, into harmless gas.
Although the TWC can oxidize a part of particles after converting harmful gas in the vehicle exhaust into harmless gas, the operation condition of the engine is complex and changeable in the actual running process of the vehicle, and the number of the particles in the vehicle exhaust is large under most conditions, the TWC can not effectively capture more particles, so that only setting the TWC behind the engine of the vehicle can cause the risk that the emission of the large number of the particles in the vehicle exhaust exceeds the standard.
Disclosure of Invention
The embodiment of the application provides a particle control method and a related device for vehicle tail gas, which can effectively control the particle quantity of the vehicle tail gas under various working conditions.
In view of this, a first aspect of an embodiment of the present application provides a particulate control method for vehicle exhaust, including:
acquiring current operation condition data of a target vehicle;
determining a corresponding particulate matter control strategy according to the current operation condition data;
according to the particulate matter control strategy, the opening and closing degrees of a first control valve and a second control valve are controlled, the first control valve is used for controlling the opening and closing of a first exhaust pipeline behind a three-way catalytic converter TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline behind the TWC, a particulate trap GPF is installed in the second exhaust pipeline, and the GPF is used for capturing particulates.
A second aspect of the embodiments of the present application provides a particulate control device for vehicle exhaust, including:
the acquisition unit is used for acquiring current operation condition data of the target vehicle;
the determining unit is used for determining a corresponding particulate matter control strategy according to the current operation condition data;
the control unit is used for controlling the opening and closing degree of a first control valve and a second control valve according to the particulate matter control strategy, the first control valve is used for controlling the opening and closing of a first exhaust pipeline behind a three-way catalytic converter TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline behind the TWC, a particulate trap GPF is installed in the second exhaust pipeline, and the GPF is used for capturing particulates.
A third aspect of the embodiments of the present application provides an electronic device, including:
a memory for storing executable instructions;
and the processor is used for realizing the particle control method of the vehicle tail gas when executing the executable instructions stored in the memory.
A fourth aspect of the embodiments of the present application provides a computer readable medium storing executable instructions for implementing, when executed by a processor, a method for controlling particles of vehicle exhaust provided by the embodiments of the present application.
The embodiment of the application provides a particle control method of vehicle tail gas, which comprises the following steps: acquiring current operation condition data of a target vehicle; determining a corresponding particulate matter control strategy according to the current operation condition data; and controlling the opening and closing degrees of a first control valve and a second control valve according to a particulate matter control strategy, wherein the first control valve is used for controlling the opening and closing of a first exhaust pipeline after the TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline after the TWC, and a GPF (general purpose surface) is arranged in the second exhaust pipeline and used for capturing particulates. Through the scheme, the effective control of the particulate matter quantity of the vehicle tail gas can be realized under various working conditions.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
Fig. 1 is a flowchart of a method for controlling particles in exhaust gas of a vehicle according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a TWC with GPF disposed thereon according to an embodiment of the present application;
FIG. 3 is a graph of valve opening factor correspondence based on engine water temperature provided in an embodiment of the present application;
fig. 4 is a valve opening factor correspondence chart based on the change rate of the accelerator pedal according to the embodiment of the present application;
FIG. 5 is a valve opening factor correspondence graph based on the rate of change of the accelerator pedal and the engine water temperature provided in an embodiment of the present application;
fig. 6 is a schematic diagram of a particulate control device for vehicle exhaust according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the related art, a TWC is usually only arranged behind an engine of a vehicle, although the TWC can convert exhaust gas which is generated by burning fuel and causes atmospheric pollution when the engine of the vehicle runs into harmless gas, the running condition of the engine is complex and changeable in the actual running process of the vehicle, particularly, the emission of the number of particulate matters can be obviously increased under the cold start condition or the post-idling accelerating condition, the overall emission of the number of the particulate matters can be obviously increased, and at the moment, the effective trapping of a large number of the particulate matters in the exhaust gas of the vehicle can not be realized by only one TWC, so that the vehicle with the TWC still has a great risk of exceeding the emission standard of the number of the particulate matters.
In view of the above, the application provides a particulate control method and a related device for vehicle exhaust, which can effectively control the amount of particulate matters in the vehicle exhaust under various working conditions.
The following describes a method for controlling particles in vehicle exhaust according to an embodiment of the present application, as shown in fig. 1, and fig. 1 is a flowchart of a method for controlling particles in vehicle exhaust according to an embodiment of the present application, where the method includes:
s101, acquiring current operation condition data of a target vehicle.
In the actual running process of the vehicle, the emission quantity of the particulate matters under different working conditions is different, the emission quantity of the particulate matters under certain working conditions is smaller, and the emission quantity of the particulate matters under certain working conditions is larger so as to realize effective particulate control on different working conditions, current running working condition data of the target vehicle are firstly obtained, and the current running working condition data comprise various working condition data in the running process of the vehicle, such as the working condition data of various equipment on the vehicle, such as an engine, an accelerator, a brake and the like.
S102, determining a corresponding particulate matter control strategy according to the current operation condition data.
After the current operation condition data of the target vehicle is acquired in S101, the corresponding particulate matter control strategy may be determined according to the current operation condition data because the particulate matter emission amounts under different operation conditions are different.
S103, controlling opening and closing degrees of a first control valve and a second control valve according to a particulate matter control strategy, wherein the first control valve is used for controlling opening and closing of a first exhaust pipeline after TWC of a target vehicle, the second control valve is used for controlling opening and closing of a second exhaust pipeline after TWC, and GPF is installed in the second exhaust pipeline and used for capturing particulates.
As shown in fig. 2, 201 in fig. 2 is an engine of a vehicle, 202 is a TWC of the vehicle, 203 is a GPF of the vehicle, 204 is a first control valve, 205 is a second control valve, and the particulate matter control strategy in the present application is used for controlling the opening and closing degree of the first control valve and the second control valve, where the first control valve is used for controlling a first exhaust pipeline after the TWC, the second control valve is used for controlling a second exhaust pipeline after the TWC, a particulate trap (Gasoline Particulate Filter, GPF) is installed in the second exhaust pipeline, and the GPF is used for collecting particulates to form a bypass pipeline.
In the related art, only the TWC is installed after the engine, and because the oxidation effect of the TWC on the particulate matters is limited, the GPF is introduced in the application, so that the GPF can effectively collect the particulate matters, wherein, because the GPF is not a direct-conduction device, if the GPF is directly installed after the TWC, although the particulate matter number control of the vehicle exhaust gas can be realized, the GPF is not a completely-conduction device, which can result in larger back pressure of the vehicle, the application provides a second exhaust pipeline provided with the GPF and a first exhaust pipeline directly connected with the TWC, and the opening and closing degree of the first control valve and the second control valve is controlled according to the particulate matter control strategy, so that the effective control of the particulate matter number of the vehicle exhaust gas is realized under various working conditions.
In some embodiments, the current operating condition data includes a current engine water temperature, and in determining a corresponding particulate matter control strategy based on the current operating condition data, the method includes:
when the current water temperature of the engine is smaller than the water temperature threshold value, determining a particulate matter control strategy to control the first control valve to be completely closed and control the second control valve to be completely opened;
when the current engine water temperature is greater than or equal to the water temperature threshold, the current idle time of the target vehicle is obtained, and a particulate matter control strategy is determined according to the current idle time.
Specifically, when the vehicle is actually running, if the engine is in the cold start working condition, the tail gas of the vehicle contains more particulate matters, and the current running working condition data can include the current engine water temperature, and whether the engine is in the cold start working condition is judged through the engine water temperature.
When the current water temperature of the engine is smaller than the water temperature threshold value, the engine is in a cold start working condition at the moment, and the quantity of particulate matters in the vehicle tail gas is large, so that the particulate matter control strategy can be determined to control the first control valve to be completely closed and the second control valve to be completely opened, namely, according to the particulate matter control strategy, the vehicle tail gas after TWC can be completely passed through GPF, and the GPF can trap the particulate matters in the cold start tail gas, so that the aim of controlling the quantity of particulate matters in the vehicle tail gas under the cold start working condition to be discharged is fulfilled.
When the current water temperature of the engine is greater than or equal to the water temperature threshold value, the engine is not in a cold start working condition at the moment, and the quantity of particulate matters in the tail gas of the vehicle is possibly large because the vehicle is in other working conditions, so that the current idle time of the target vehicle can be obtained, and a corresponding particulate matter control strategy can be determined according to the current idle time.
In some embodiments, in determining a particulate matter control strategy based on a current idle time, the method includes:
when the current idle time is smaller than the time threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a first valve opening factor k1 of the water temperature of the engine;
when the current idle time is greater than or equal to the time threshold, the current accelerator pedal change rate of the target vehicle is obtained, and a particulate matter control strategy is determined according to the current accelerator pedal change rate.
Specifically, when the vehicle is not in the cold start condition but in the idle condition, the vehicle may generate more particulate matters due to acceleration after idle, so after analyzing the current engine water temperature of the target vehicle, a corresponding particulate matter control strategy may be determined according to the current idle time, where the current idle time is used to indicate the time of restarting the target vehicle after the current stop.
When the current idle time is smaller than the time threshold, the target vehicle is not in the idle working condition at the moment, and is not in the cold starting working condition or the idle working condition at the moment, but because the particle number of the vehicle tail gas is closely related to the engine temperature, the particle control strategy can be determined to control the opening degree of the second control valve based on the first valve opening factor k1 of the current engine water temperature, wherein the corresponding relation between the engine water temperature and the valve opening factor is shown in fig. 3, namely the corresponding first valve opening factor k1 can be determined according to the corresponding relation between the current engine water temperature and the valve opening factor, the exhaust gas quantity passing through the GPF can be reasonably distributed by controlling the opening degree of the second control valve, so that GPF filtering can be carried out on different exhaust gas quantities under different engine water temperatures, and the particle number in the vehicle exhaust gas can be effectively reduced.
When the current idle time is greater than or equal to the time threshold, the condition that the target vehicle is in an idle working condition and the quantity of the particulate matters in the tail gas of the vehicle is possibly increased is indicated, and therefore the current accelerator pedal change rate of the target vehicle can be obtained, and a corresponding particulate matter control strategy is determined according to the current accelerator pedal change rate.
In some embodiments, in determining a particulate matter control strategy based on a current accelerator pedal rate of change, the method includes:
when the current accelerator pedal change rate is greater than or equal to the change rate threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a second valve opening factor k2 of the current accelerator pedal change rate;
and when the current accelerator pedal change rate is smaller than the change rate threshold, determining the particulate matter control strategy to control the opening degree of the second control valve based on the engine water temperature and the third valve opening factor k3 of the current accelerator pedal change rate.
Specifically, when the vehicle is in an idle working condition, if the vehicle suddenly accelerates, the amount of particulate matters in the vehicle exhaust gas increases, so when the current accelerator pedal change rate is greater than or equal to a change rate threshold value, it indicates that the target vehicle is in a sudden acceleration working condition, and at this time, the amount of particulate matters in the vehicle exhaust gas is closely related to the accelerator pedal change rate, so that it can be determined that the particulate matter control strategy is to control the opening degree of the second control valve based on the second valve opening factor k2 of the current accelerator pedal change rate, wherein the corresponding relation between the accelerator pedal change rate and the valve opening factor is as shown in fig. 4, that is, the corresponding second valve opening factor k2 can be determined according to the corresponding relation between the current accelerator pedal change rate and the valve opening factor, the amount of exhaust gas passing through the GPF can be reasonably distributed by controlling the opening degree of the second control valve, and GPF filtering can be performed on different amounts under sudden acceleration after idle, so as to effectively reduce the amount of particulate matters in the vehicle exhaust gas.
When the current accelerator pedal change rate is smaller than the change rate threshold, the engine is in an idle working condition at the moment, but no sudden acceleration exists, so that the influence of the engine water temperature and the accelerator pedal change rate on the amount of particulate matters in the vehicle tail gas can be comprehensively analyzed, the particulate matter control strategy can be determined to control the opening degree of the second control valve based on the engine water temperature and the third valve opening degree factor k3 of the current accelerator pedal change rate, GPF filtering on different exhaust gas amounts under slow acceleration after idle is realized, and the amount of the particulate matters in the vehicle exhaust gas is effectively reduced.
In some embodiments, to comprehensively consider the influence of the engine water temperature and the accelerator pedal change rate on the amount of particulate matter in the vehicle exhaust, the method includes, in controlling the opening degree of the second control valve based on the third valve opening factor k3 of the current accelerator pedal change rate and the engine water temperature:
determining a first valve opening factor k1 based on a current engine water temperature;
determining a second valve opening factor k2 based on a current accelerator pedal change rate;
multiplying the first valve opening factor k1 and the second valve opening factor k2 to obtain a third valve opening factor k3;
the opening degree of the second control valve is controlled based on the third valve opening factor k 3.
As shown in fig. 5, the corresponding first valve opening factor k1 and second valve opening factor k2 may be determined according to the current engine water temperature and the current accelerator pedal change rate, and then the first valve opening factor k1 and the second valve opening factor k2 are multiplied to accurately obtain the third valve opening factor k3, and then the opening degree of the second control valve is controlled based on the third valve opening factor k 3.
In some embodiments, to achieve reasonable distribution of exhaust gas after the TWC, the degree of closure of the first control valve corresponds to the degree of opening of the second control valve, e.g., when the degree of opening of the second control valve is 80%, the degree of closure of the first control valve is also 80%.
In some embodiments, to achieve unidirectional flow of the gas in the second exhaust line, i.e. to prevent backflow of the gas in the second exhaust line, a one-way valve may be installed in the second exhaust line, as shown in fig. 2, where 206 is a one-way valve in fig. 2.
In summary, an embodiment of the present application provides a method for controlling particles in exhaust gas of a vehicle, including: acquiring current operation condition data of a target vehicle; determining a corresponding particulate matter control strategy according to the current operation condition data; and controlling the opening and closing degrees of a first control valve and a second control valve according to a particulate matter control strategy, wherein the first control valve is used for controlling the opening and closing of a first exhaust pipeline behind a three-way catalytic converter TWC of a target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline behind the TWC, and a particulate trap GPF is installed in the second exhaust pipeline and used for capturing particulates. Through the scheme, the effective control of the particulate matter quantity of the vehicle tail gas can be realized under various working conditions.
Furthermore, the method enables the second exhaust pipeline provided with the GPF in the cold start or post-idling acceleration working condition, controls the opening degree of the second control valve according to the water temperature of the engine and the change rate of the accelerator pedal, can realize the effective control of the particle quantity of the vehicle tail gas through the GPF of the second exhaust pipeline, and plays the effect of optimizing the back pressure of the system through reasonably controlling the exhaust quantity of the second exhaust pipeline.
The following describes a particulate control device for vehicle exhaust provided in the present application through an embodiment of a device, as shown in fig. 6, fig. 6 is a schematic diagram of a particulate control device for vehicle exhaust provided in the embodiment of the present application, where the device includes:
an obtaining unit 601, configured to obtain current operation condition data of a target vehicle;
a determining unit 602, configured to determine a corresponding particulate matter control policy according to the current operating condition data;
the control unit 603 is configured to control opening and closing degrees of a first control valve and a second control valve according to a particulate matter control strategy, where the first control valve is configured to control opening and closing of a first exhaust pipe behind a TWC of a three-way catalytic converter of a target vehicle, the second control valve is configured to control opening and closing of a second exhaust pipe behind the TWC, and a particulate trap GPF is installed in the second exhaust pipe, and the GPF is configured to perform particulate trapping.
In some embodiments, the current operating condition data includes a current engine water temperature, and the determining unit 602 is specifically configured to:
when the current water temperature of the engine is smaller than the water temperature threshold value, determining a particulate matter control strategy to control the first control valve to be completely closed and control the second control valve to be completely opened;
when the current engine water temperature is greater than or equal to the water temperature threshold, the current idle time of the target vehicle is obtained, and a particulate matter control strategy is determined according to the current idle time.
In some embodiments, the determining unit 602 is specifically configured to, in determining the particulate matter control strategy based on the current idle time:
when the current idle time is smaller than the time threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a first valve opening factor k1 of the water temperature of the engine;
when the current idle time is greater than or equal to the time threshold, the current accelerator pedal change rate of the target vehicle is obtained, and a particulate matter control strategy is determined according to the current accelerator pedal change rate.
In some embodiments, the determining unit 602 is specifically configured to, in determining the particulate matter control strategy based on a current accelerator pedal rate of change:
when the current accelerator pedal change rate is greater than or equal to the change rate threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a second valve opening factor k2 of the current accelerator pedal change rate;
and when the current accelerator pedal change rate is smaller than the change rate threshold, determining the particulate matter control strategy to control the opening degree of the second control valve based on the engine water temperature and the third valve opening factor k3 of the current accelerator pedal change rate.
In some embodiments, the determining unit 602 is specifically configured to:
determining a first valve opening factor k1 based on a current engine water temperature;
determining a second valve opening factor k2 based on a current accelerator pedal change rate;
multiplying the first valve opening factor k1 and the second valve opening factor k2 to obtain a third valve opening factor k3;
the opening degree of the second control valve is controlled based on the third valve opening factor k 3.
In some embodiments, the degree of closure of the first control valve corresponds to the degree of opening of the second control valve.
It should be noted that, the specific working process of each module provided in the foregoing embodiment of the present application may correspondingly refer to the corresponding implementation manner in the foregoing method embodiment, which is not repeated herein.
Another embodiment of the present application provides an electronic device, including:
a memory for storing executable instructions;
and the processor is used for realizing the method in the method embodiment of the application when executing the executable instructions stored in the memory.
Another embodiment of the present application provides a computer readable storage medium storing executable instructions for implementing the method of the foregoing method embodiment of the present application when executed by a processor.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. 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 application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A particulate control method for vehicle exhaust, the method comprising:
acquiring current operation condition data of a target vehicle;
determining a corresponding particulate matter control strategy according to the current operation condition data;
according to the particulate matter control strategy, the opening and closing degrees of a first control valve and a second control valve are controlled, the first control valve is used for controlling the opening and closing of a first exhaust pipeline behind a three-way catalytic converter TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline behind the TWC, a particulate trap GPF is installed in the second exhaust pipeline, and the GPF is used for capturing particulates.
2. The method of claim 1, wherein the current operating condition data comprises a current engine water temperature, and wherein the determining a corresponding particulate matter control strategy based on the current operating condition data comprises:
when the current engine water temperature is smaller than a water temperature threshold value, determining the particulate matter control strategy to control the first control valve to be completely closed and control the second control valve to be completely opened;
and when the current engine water temperature is greater than or equal to the water temperature threshold value, acquiring the current idle time of the target vehicle, and determining the particulate matter control strategy according to the current idle time.
3. The method of claim 2, wherein said determining said particulate matter control strategy based on said current idle time comprises:
when the current idle time is smaller than a time threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a first valve opening factor k1 of the engine water temperature;
and when the current idle time is greater than or equal to the time threshold, acquiring the current accelerator pedal change rate of the target vehicle, and determining the particulate matter control strategy according to the current accelerator pedal change rate.
4. The method of claim 3, wherein said determining said particulate matter control strategy based on said current accelerator pedal rate of change comprises:
when the current accelerator pedal change rate is greater than or equal to a change rate threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on a second valve opening factor k2 of the current accelerator pedal change rate;
and when the current accelerator pedal change rate is smaller than the change rate threshold, determining that the particulate matter control strategy is to control the opening degree of the second control valve based on the engine water temperature and a third valve opening factor k3 of the current accelerator pedal change rate.
5. The method according to claim 1, characterized in that the third valve opening factor k3 based on the current accelerator pedal change rate and the engine water temperature controls the opening degree of the second control valve, including:
determining a first valve opening factor k1 based on the current engine water temperature;
determining a second valve opening factor k2 based on the current accelerator pedal change rate;
multiplying the first valve opening factor k1 and the second valve opening factor k2 to obtain the third valve opening factor k3;
and controlling the opening degree of the second control valve based on the third valve opening degree factor k 3.
6. The method of claims 1-5, wherein the degree of closure of the first control valve corresponds to the degree of opening of the second control valve.
7. A particulate control device for vehicle exhaust, the device comprising:
the acquisition unit is used for acquiring current operation condition data of the target vehicle;
the determining unit is used for determining a corresponding particulate matter control strategy according to the current operation condition data;
the control unit is used for controlling the opening and closing degree of a first control valve and a second control valve according to the particulate matter control strategy, the first control valve is used for controlling the opening and closing of a first exhaust pipeline behind a three-way catalytic converter TWC of the target vehicle, the second control valve is used for controlling the opening and closing of a second exhaust pipeline behind the TWC, a particulate trap GPF is installed in the second exhaust pipeline, and the GPF is used for capturing particulates.
8. The apparatus of claim 7, wherein the degree of closure of the first control valve corresponds to the degree of opening of the second control valve.
9. An electronic device, comprising:
a memory for storing executable instructions;
a processor for implementing the particulate control method of vehicle exhaust according to any one of claims 1 to 6 when executing the executable instructions stored in the memory.
10. A computer readable storage medium storing executable instructions for implementing the particulate control method of vehicle exhaust according to any one of claims 1 to 6 when executed by a processor.
CN202310225370.4A 2023-03-03 2023-03-03 Particle control method and related device for vehicle tail gas Pending CN116066217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310225370.4A CN116066217A (en) 2023-03-03 2023-03-03 Particle control method and related device for vehicle tail gas

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Application Number Priority Date Filing Date Title
CN202310225370.4A CN116066217A (en) 2023-03-03 2023-03-03 Particle control method and related device for vehicle tail gas

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Publication Number Publication Date
CN116066217A true CN116066217A (en) 2023-05-05

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