CN111594301B - Temperature control method and device for automobile exhaust system, automobile and storage medium - Google Patents
Temperature control method and device for automobile exhaust system, automobile and storage medium Download PDFInfo
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- CN111594301B CN111594301B CN202010402335.1A CN202010402335A CN111594301B CN 111594301 B CN111594301 B CN 111594301B CN 202010402335 A CN202010402335 A CN 202010402335A CN 111594301 B CN111594301 B CN 111594301B
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- 238000001514 detection method Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 21
- 230000001276 controlling effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
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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
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
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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
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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
- F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
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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
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a temperature control method and device for an automobile exhaust system, an automobile and a storage medium. This car exhaust system includes: a catalyst externally connected with the engine and a gasoline engine particle catcher GPF connected with the catalyst. The temperature control method of the automobile exhaust system comprises the following steps: obtaining engine working condition information of an engine, wherein the engine working condition information comprises: engine speed and engine load information. And determining the characteristic temperature of the GPF according to the engine working condition information, wherein the characteristic temperature is used for reflecting the actual temperature of the GPF. When the characterized temperature is greater than or equal to the temperature threshold, the engine is controlled to reduce the temperature of the GPF. The method can directly determine the characterization temperature reflecting the actual temperature of the GPF without a temperature sensor, solves the problem of cost rise of the automobile exhaust system caused by the arrangement of the temperature sensor, and reduces the manufacturing cost of the automobile exhaust system.
Description
Technical Field
The embodiment of the invention relates to the technical field of automobile control, in particular to a temperature control method and device of an automobile exhaust system, an automobile and a storage medium.
Background
An exhaust System of an automobile generally refers to a series of devices for collecting and discharging gas generated during the operation of an Engine in the automobile, and is one of essential systems of the automobile, and is generally managed by an Engine Management System (EMS).
Current automotive exhaust systems typically include: the device comprises a catalyst externally connected with an engine, a Gasoline engine Particulate Filter (GPF) connected with the catalyst, a connecting pipe and two temperature sensors respectively arranged at a GPF inlet and a GPF outlet. Wherein, the gas generated in the working process of the engine is discharged to the outside of the automobile through the catalyst and the GPF in sequence. The two temperature sensors are respectively used for detecting the temperature of the GPF inlet gas and the temperature of the GPF outlet gas. Since the hardware-bearable temperature of the GPF has a limited range, when the actual temperature of the GPF exceeds the maximum value of the limited range, the GPF may be damaged, so the EMS may obtain two temperatures detected by the two temperature sensors, and when any one of the two temperatures is greater than a specified threshold, the engine is controlled to reduce the temperature of the GPF, thereby ensuring the normal operation of the GPF.
However, the higher cost of the temperature sensor leads to increased manufacturing costs of current automotive exhaust systems.
Disclosure of Invention
The invention provides a temperature control method and device for an automobile exhaust system, an automobile and a storage medium, which are used for reducing the manufacturing cost of the automobile exhaust system and further reducing the manufacturing cost of the automobile.
In a first aspect, an embodiment of the present invention provides a temperature control method for an automobile exhaust system, where the automobile exhaust system includes: the method comprises the following steps of (1) connecting a catalyst of an external engine and a gasoline engine particle trap GPF connected with the catalyst, wherein the method comprises the following steps:
obtaining engine operating condition information of the engine, wherein the engine operating condition information comprises: engine speed and engine load information;
determining the characteristic temperature of the GPF according to the engine working condition information, wherein the characteristic temperature is used for reflecting the actual temperature of the GPF;
when the characterized temperature is greater than or equal to a temperature threshold, reducing the temperature of the GPF by controlling the engine.
In a second aspect, an embodiment of the present invention further provides a temperature control apparatus for an automobile exhaust system, where the automobile exhaust system includes: the catalyst converter of external engine and with the gasoline engine particulate trap GPF that the catalyst converter is connected, the device includes:
the acquisition module is used for acquiring engine working condition information of the engine, and the engine working condition information comprises: engine speed and engine load information;
the determining module is used for determining the characterization temperature of the GPF according to the engine working condition information, and the characterization temperature is used for reflecting the actual temperature of the GPF;
a processing module to reduce a temperature of the GPF by controlling the engine when the characterized temperature is greater than or equal to a temperature threshold.
In a third aspect, an embodiment of the present invention further provides an automobile, where the automobile includes:
engine and automotive exhaust systems;
one or more controllers;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the method for controlling the temperature of the exhaust system of the automobile as described in any one of the first aspects above.
In a fourth aspect, embodiments of the present invention also provide a computer storage medium, where the computer executable instructions, when executed by a computer processor, are used to perform a method of controlling the temperature of an automotive exhaust system as described in any one of the first aspect above.
According to the method, the characterization temperature of the GPF is directly determined through the acquired engine working condition information of the engine, so that when the characterization temperature is greater than or equal to the temperature threshold value, the temperature of the GPF is reduced by controlling the engine, and the normal work of the GPF is guaranteed. Compared with the related art, on the basis of ensuring the normal work of the GPF, the automobile exhaust system does not need to be provided with a temperature sensor, the problem that the cost of the automobile exhaust system is increased due to the arrangement of the temperature sensor is solved, and the manufacturing cost of the automobile exhaust system is reduced.
Drawings
FIG. 1 is a schematic diagram of an exhaust system for a vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling the temperature of an exhaust system of a vehicle according to one embodiment of the present disclosure;
FIG. 3 is a flowchart of a method for forming a temperature-related information table according to a first embodiment of the present application;
FIG. 4 is a schematic structural diagram of a temperature control apparatus of an exhaust system of an automobile according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an automobile according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
With the stricter of the national automobile emission regulations, the automobile dischargeable particles are also regulated correspondingly. Since the gas generated during the operation of the engine generally hardly meets the emission requirements regulated by the emission regulations of automobiles, the exhaust system of the automobile is produced. The automobile exhaust system can carry out aftertreatment on gas exhausted by an engine, so that the gas to be exhausted meets the emission requirement.
Embodiments of the present invention provide an automobile that includes an engine, an automobile exhaust system, one or more controllers, and a memory device. Wherein, the engine is communicated with an automobile exhaust system and is connected with the controller. The controller may be used to control the engine to manage the vehicle exhaust system. For example, the controller may be an EMS or a single chip microcomputer control unit. Referring to fig. 1, a schematic structural diagram of an automobile exhaust system according to an embodiment of the present invention is shown, where the automobile exhaust system 100 includes: a catalyst 102 externally connected to the engine 101, and a GPF103 connected to the catalyst 102. Among them, the catalyst 102 is used to purify harmful gases in the gas discharged from the engine 101. GPF103 is used to capture particulates from the gases exiting catalyst 102. In practical applications, the temperature that the hardware of the GPF can withstand has a limited range, and the actual temperature of the GPF affects the operation capability of the GPF. Therefore, to ensure proper operation of the GPF, its actual temperature needs to be controlled below the maximum value of the temperature range. The embodiment of the invention provides a temperature control method of an automobile exhaust system, which can be used for controlling the actual temperature of GPF (general purpose power factor) in the automobile exhaust system shown as 1 in operation.
Example one
Fig. 2 is a flowchart of a temperature control method for an automobile exhaust system according to an embodiment of the present disclosure, where the embodiment is applicable to the above-mentioned automobile, and the automobile exhaust system of the automobile may be the automobile exhaust system 100 shown in fig. 1. The method can be executed by the controller of the automobile, and specifically comprises the following steps:
The engine operating condition information includes: engine speed and engine load information. Engine speed refers to the number of revolutions per minute of the engine crankshaft. The engine load information is also referred to as engine load rate information. The engine load factor information is information on a ratio of a torque generated when a partial throttle is opened to a maximum torque generated when the throttle is fully opened at the same engine speed. Optionally, the engine operating condition information may further include: the temperature of the intake air of the engine and/or the ambient temperature outside the vehicle. Of course, the engine operating condition information may also include other factor information that may affect the actual temperature of the GPF, which is not limited in the embodiment of the present invention. Therefore, when the engine working condition information comprises more effective information, and the GPF representation temperature is determined according to the engine working condition information subsequently, the accuracy of the determined GPF representation temperature is higher.
And step 202, determining the GPF characteristic temperature according to the engine working condition information. This characterization temperature is used to reflect the actual temperature of the GPF.
For example, characterizing the temperature may include: the temperature of the gas at the GPF inlet, the temperature on the GPF, or the temperature of the gas at the GPF outlet. Referring to fig. 1, the GPF inlet may be at point C shown in fig. 1, the GPF may be at point D shown in fig. 1, and the GPF outlet may be at point E shown in fig. 1.
Optionally, the determining the characteristic temperature of the GPF according to the engine operating condition information may include: the controller looks up a predetermined temperature-related information table to determine the characteristic temperature of the GPF matched with the engine working condition information. The temperature-related information table may store a corresponding relationship (i.e., a matching relationship) between the engine operating condition information and the characteristic temperature of the GPF in advance. The temperature-related information table may be formed by experiments in advance, or the temperature-related information table may be formed by actual working experience.
In the following description, the temperature-related information table is used as an example. Please refer to fig. 3, which illustrates a flowchart of a method for forming a temperature-related information table according to an embodiment of the present application. As shown in fig. 3, the forming of the temperature-related information table may include:
301, acquiring temperature acquisition values acquired at each temperature detection point when the engine is in each set engine working condition in the simulation test environment. Wherein, each temperature detection point is formed by additionally arranging a temperature sensor at each set position in an automobile exhaust system.
Optionally, one or more set positions may be included in the exhaust system of the vehicle, and one or more corresponding temperature detection points may be included. In one or more temperature detection points, the temperature collection value collected by at least one temperature detection point can be used for reflecting the actual temperature of the GPF, namely, the temperature collection value collected by at least one temperature detection point can be used as the characterizing temperature of the GPG.
The embodiment of the invention takes the example that the automobile exhaust system comprises 5 set positions. Among the 5 setting positions, the first setting position may be located between the catalyst and the external engine. The second set position may be located on the catalyst. The third set position may be at the GPF access port. The fourth set position may be located on the GPF. The fifth set position may be at the GPF exhaust. That is, referring to fig. 1, the first setting position is at point a, the second setting position is at point B, the third setting position is at point C, the fourth setting position is at point D, and the fifth setting position is at point E.
In the experimental process, the automobile exhaust system can be provided with 5 temperature sensors in the 5 setting positions, and the temperature sensors are used for respectively detecting the temperature acquisition values of the temperature detection points corresponding to the setting positions. For example, the temperature sensor may be a thermocouple temperature sensor.
The operating condition of the engine is set as engine condition 1. For example, engine operating condition 1 is engine speed s1, engine load p1, engine intake temperature ec1, and ambient temperature outside the vehicle cc 1. And acquiring temperature acquisition values acquired by 5 temperature detection points when the engine is under the engine working condition 1. And changing the operation condition of the engine to be set as an engine condition 2. For example, engine operating condition 2 is engine speed s2, engine load p2, engine intake temperature ec2, and ambient temperature outside the vehicle cc 2. And acquiring temperature acquisition values acquired by 5 temperature detection points when the engine is under the engine working condition 1.
And changing the set working condition of the engine for multiple times to obtain the temperature acquisition value acquired at each temperature detection point when the engine is in each set working condition of the engine. The number of times of changing the set engine operating condition may be determined according to an actual situation, which is not limited in the embodiment of the present invention.
And 302, recording the association between each set engine working condition and the corresponding temperature acquisition value, forming a temperature association information table and storing the temperature association information table.
Optionally, when the temperature correlation information table stores the correspondence between the engine working condition information and the characteristic temperature of the GPF, the controller correlates and records each set engine working condition and the corresponding temperature acquisition value, and then screens the corresponding temperature acquisition value of any set engine working condition to obtain the characteristic temperature of the GPF. And recording the working condition of each set engine and the corresponding GPF characterization temperature, and obtaining and storing a temperature correlation information table.
Or, the temperature-related information table may further store a corresponding relationship between the engine working condition information and the temperature collection value, and the controller directly forms and stores the temperature-related information table after recording each set engine working condition and the corresponding temperature collection value in a related manner. Correspondingly, the controller searches a predetermined temperature-related information table, and the process of determining the characteristic temperature of the GPF matched with the engine working condition information comprises the following steps: the controller searches a predetermined temperature-related information table, and first determines a temperature acquisition value corresponding to the engine working condition information. And then, according to the temperature acquisition value, screening to obtain the GPF characterization temperature.
In the example where the vehicle exhaust system includes 5 setting positions, the controller may obtain a first temperature collection value C1 corresponding to the first setting position, a second temperature collection value C2 corresponding to the second setting position, a third temperature collection value C3 corresponding to the third setting position, a fourth temperature collection value C4 corresponding to the fourth setting position, and a fifth temperature collection value C5 corresponding to the fifth setting position under any engine operating condition.
For the first temperature acquisition value C1: which is the engine exhaust temperature, may be determined based on engine operating conditions.
For the second temperature acquisition value C2: since the gas exhausted from the engine releases heat after undergoing the oxidation-reduction reaction by the catalyst, the second temperature collection value C2 is greater than the first temperature collection value C1, and the second temperature collection value C2 can be considered to satisfy: c2 ═ C1+ G, G being the amount of heat released during the redox reaction (a thermal reaction) of the catalyst.
For the third temperature acquisition value C3: heat loss is caused by heat dissipation of the gas after it is exhausted from the catalyst. Thus, the third temperature acquisition value C3 is smaller than the second temperature acquisition value C2, and the third temperature acquisition value C3 may be considered to satisfy: c3 ═ C2-H, H being the loss temperature of the gas after discharge from the catalyst.
For the fourth temperature acquisition value C4: since the gas will react exothermically after entering the GPF to release heat, the fourth temperature gather C4 is greater than the third temperature gather C3, and the fourth temperature gather C4 may be considered to satisfy: c4 ═ C3+ J, J being the amount of heat released during the thermal reaction of GPF.
For the fifth temperature acquisition value C5: heat loss is caused by heat dissipation of the gas after the gas is exhausted from the GPF. Thus, the fifth temperature acquisition value C5 is smaller than the fourth temperature acquisition value C4, and the fifth temperature acquisition value C5 may be regarded as satisfying: c5 ═ C4-I, I is the loss temperature of the gas after it has been exhausted from the GPF.
In this embodiment of the present application, the process of determining the representative temperature of the GPF by the controller according to the engine operating condition information may further include: and the controller determines the characteristic temperature of the GPF according to the engine working condition information and the temperature correlation model. Specifically, the controller may first obtain a pre-stored temperature correlation model; inputting engine working condition information to the temperature correlation model; and then obtaining the characteristic temperature of the GPF output by the temperature correlation model.
And step 203, when the characteristic temperature is larger than or equal to the temperature threshold value, reducing the temperature of the GPF by controlling the engine.
The temperature threshold may be a maximum value of a hardware-tolerable temperature range of the GPF, or the temperature threshold may be a maximum temperature of the GPF when the GPF is required to be maintained under a certain operation index. Of course, the temperature threshold may also be limited according to the actual situation, which is not limited in the embodiment of the present invention.
Alternatively, when the characteristic temperature is greater than or equal to the temperature threshold, the controller may reduce the temperature of the GPF by controlling the engine in a manner that includes, but is not limited to, the following:
first, the controller may control the engine to enrich the air-fuel ratio. For example, the controller may control a fuel valve of the engine to increase the opening by a set step size until the characteristic temperature is less than the temperature threshold.
Second, the controller may control the engine to reduce torque. For example, the controller controls the engine to set a threshold to reduce torque until the characteristic temperature is less than the temperature threshold.
Third, the controller may control engine fuel cut. For example, the controller controls a throttle valve of the engine to rotate to an idle position.
According to the technical scheme of the embodiment, the representation temperature of the GPF is directly determined through the acquired engine working condition information of the engine, so that when the representation temperature is larger than or equal to the temperature threshold value, the temperature of the GPF is reduced through controlling the engine, and the normal work of the GPF is guaranteed. Compared with the related art, on the basis of ensuring the normal work of the GPF, the automobile exhaust system does not need to be provided with a temperature sensor, the problem that the cost of the automobile exhaust system is increased due to the arrangement of the temperature sensor is solved, and the manufacturing cost of the automobile exhaust system is reduced.
Example two
The temperature control device of the automobile exhaust system provided by the second embodiment of the invention can execute the temperature control method of the automobile exhaust system provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Fig. 4 is a schematic structural diagram of a temperature control device of an automobile exhaust system according to a second embodiment of the present invention. As shown in fig. 4, the temperature control apparatus of an exhaust system of an automobile includes:
an obtaining module 401 configured to obtain engine operating condition information of an engine, where the engine operating condition information includes: engine speed and engine load information.
A determination module 402 to determine a representative temperature of the GPF based on the engine operating condition information, the representative temperature to reflect an actual temperature of the GPF.
A processing module 403 to reduce the temperature of the GPF by controlling the engine when the characterized temperature is greater than or equal to the temperature threshold.
According to the technical scheme, the engine working condition information of the engine acquired by the acquisition module is used for enabling the determination module to directly determine the characteristic temperature of the GPF, and further enabling the processing module to reduce the temperature of the GPF by controlling the engine when the characteristic temperature is larger than or equal to the temperature threshold value, so that the normal work of the GPF is guaranteed. Compared with the related art, on the basis of ensuring the normal work of the GPF, the automobile exhaust system does not need to be provided with a temperature sensor, the problem that the cost of the automobile exhaust system is increased due to the arrangement of the temperature sensor is solved, and the manufacturing cost of the automobile exhaust system is reduced.
Optionally, the determining module 402 is further configured to: and searching a predetermined temperature correlation information table, and determining the characteristic temperature of the GPF matched with the engine working condition information.
Optionally, the temperature control device of the automobile exhaust system further includes an information acquisition module, which may be configured to acquire temperature acquisition values acquired at each temperature detection point when the engine is in each set engine working condition in the simulation test environment, where each temperature detection point is formed by additionally providing a temperature sensor at each set position in the automobile exhaust system. And (4) recording the working condition of each set engine and the corresponding temperature acquisition value in a correlation manner to form a temperature correlation information table and storing the temperature correlation information table.
Optionally, the vehicle exhaust system includes 5 set positions. The first set position is positioned between the catalytic converter and the externally connected engine; the second set position is on the catalyst; the third setting position is at the GPF inlet; the fourth setting position is positioned on the GPF; the fifth set position is at the GPF exhaust.
Optionally, the engine operating condition information further includes: the temperature of the intake air of the engine and/or the ambient temperature outside the vehicle.
Optionally, characterizing the temperature comprises: the temperature of the gas at the GPF inlet, the temperature on the GPF, or the temperature of the gas at the GPF outlet.
Optionally, the processing module 403 is further configured to: the fuel valve of the engine is controlled to increase the opening in set steps until the characteristic temperature is less than the temperature threshold. Alternatively, the engine is controlled to set a threshold to reduce torque until the characteristic temperature is less than the temperature threshold. Alternatively, a throttle valve of the engine is controlled to rotate to an idle position.
EXAMPLE III
Fig. 5 is a schematic structural diagram of an automobile according to a third embodiment of the present invention, and as shown in fig. 5, the automobile includes an engine 501, an exhaust system 502 of the automobile, a controller 503, and a storage device 504. The number of the controllers 503 in the vehicle may be one or more, and fig. 5 exemplifies one controller 503. An automobile exhaust system 502 is connected to the engine 501, and the automobile exhaust system 502 may be the automobile exhaust system 100 shown in fig. 1. The controller 503, the engine 501, and the storage device 504 may be connected by a bus or other means, and fig. 5 illustrates the connection by a bus as an example.
The storage device 504, which is a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the temperature control method of the exhaust system of the vehicle in the embodiment of the present invention (for example, the obtaining module 401, the determining module 402, and the processing module 403 in the temperature control device of the exhaust system of the vehicle). The controller 503 executes various functional applications and data processing of the vehicle by executing software programs, instructions and modules stored in the storage device 504, so as to implement the above-mentioned temperature control method of the vehicle exhaust system.
The storage device 504 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the storage 504 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage 504 may further include memory located remotely from the controller 503, which may be connected to the device/terminal/server over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Example four
The fourth embodiment of the invention also provides a computer storage medium. The computer executable instructions, when executed by a computer processor, are for performing the method operations as described above, and may also perform a method of controlling the temperature of an automotive exhaust system as provided by any of the embodiments of the invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A method of controlling a temperature of an exhaust system of an automobile, the exhaust system of the automobile comprising: the method comprises the following steps of (1) connecting a catalyst of an external engine and a gasoline engine particle trap GPF connected with the catalyst, wherein the method comprises the following steps:
obtaining engine operating condition information of the engine, wherein the engine operating condition information comprises: engine speed and engine load information;
determining the characteristic temperature of the GPF according to the engine working condition information, wherein the characteristic temperature is used for reflecting the actual temperature of the GPF;
when the characterized temperature is greater than or equal to a temperature threshold, reducing the temperature of the GPF by controlling the engine;
determining a representative temperature of the GPF based on the engine operating condition information, comprising:
searching a predetermined temperature correlation information table, and determining the characteristic temperature of the GPF matched with the engine working condition information;
the forming step of the temperature-related information table includes:
acquiring temperature acquisition values acquired by an engine under various set engine working conditions in a simulation test environment at various temperature detection points, wherein the various temperature detection points are formed by additionally arranging temperature sensors at various set positions in the automobile exhaust system;
recording the association between each set engine working condition and the corresponding temperature acquisition value to form a temperature association information table and store the temperature association information table;
the automobile exhaust system comprises 5 set positions, wherein the first set position is positioned between the catalyst and an externally connected engine; a second set position on the catalyst; a third set position at the GPF inlet; a fourth set position is located on the GPF; a fifth set position is located at the GPF exhaust.
2. The method of controlling temperature of an exhaust system of a vehicle according to claim 1, wherein the engine operating condition information further comprises: the temperature of the intake air of the engine and/or the ambient temperature outside the vehicle.
3. The method of controlling the temperature of an exhaust system of an automobile according to claim 1, wherein the characterizing the temperature includes: a temperature of the gas at the GPF inlet, a temperature on the GPF, or a temperature of the gas at the GPF outlet.
4. The method of controlling the temperature of an exhaust system of an automobile according to claim 1, wherein the reducing the temperature of the GPF by controlling the engine includes:
controlling a fuel valve of the engine to increase an opening by a set step size until the characteristic temperature is less than the temperature threshold;
alternatively, controlling the engine to set a threshold reduced torque until the characteristic temperature is less than the temperature threshold;
alternatively, a throttle valve of the engine is controlled to rotate to an idle position.
5. A temperature control apparatus of an automobile exhaust system, characterized by comprising: the catalyst converter of external engine and with the gasoline engine particulate trap GPF that the catalyst converter is connected, the device includes:
the acquisition module is used for acquiring engine working condition information of the engine, and the engine working condition information comprises: engine speed and engine load information;
the determining module is used for determining the characterization temperature of the GPF according to the engine working condition information, and the characterization temperature is used for reflecting the actual temperature of the GPF;
a processing module to reduce a temperature of the GPF by controlling the engine when the characterized temperature is greater than or equal to a temperature threshold;
determining a representative temperature of the GPF based on the engine operating condition information, comprising:
searching a predetermined temperature correlation information table, and determining the characteristic temperature of the GPF matched with the engine working condition information;
the forming step of the temperature-related information table includes:
acquiring temperature acquisition values acquired by an engine under various set engine working conditions in a simulation test environment at various temperature detection points, wherein the various temperature detection points are formed by additionally arranging temperature sensors at various set positions in an automobile exhaust system;
recording the association between each set engine working condition and the corresponding temperature acquisition value to form and store the temperature association information table;
the automobile exhaust system comprises 5 set positions, wherein the first set position is positioned between the catalyst and an externally connected engine; the second set position is on the catalyst; the third setting position is at the GPF inlet; the fourth setting position is positioned on the GPF; the fifth set position is at the GPF exhaust.
6. An automobile, comprising:
engine and automotive exhaust systems;
one or more controllers;
storage means for storing one or more programs;
when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the method of controlling the temperature of the exhaust system of the automobile according to any one of claims 1 to 4.
7. A computer storage medium, wherein the computer executable instructions, when executed by a computer processor, are for performing a method of temperature control of an automotive exhaust system as claimed in any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010402335.1A CN111594301B (en) | 2020-05-13 | 2020-05-13 | Temperature control method and device for automobile exhaust system, automobile and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010402335.1A CN111594301B (en) | 2020-05-13 | 2020-05-13 | Temperature control method and device for automobile exhaust system, automobile and storage medium |
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| CN111594301B true CN111594301B (en) | 2022-04-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5884477A (en) * | 1997-01-24 | 1999-03-23 | Honda Giken Kogyo Kabushiki Kaisha | Fuel supply control system for internal combustion engines |
| JP2007107397A (en) * | 2005-10-11 | 2007-04-26 | Honda Motor Co Ltd | Catalyst temperature estimating device |
| KR20100082601A (en) * | 2009-01-09 | 2010-07-19 | 콘티넨탈 오토모티브 시스템 주식회사 | Method for preventing catalyst overheating |
| CN107780996A (en) * | 2017-09-27 | 2018-03-09 | 无锡威孚力达催化净化器有限责任公司 | A kind of control device and control method of the temperature raising of choke valve assisting DPF regeneration |
| CN109386353A (en) * | 2017-08-04 | 2019-02-26 | 福特全球技术公司 | System and method for vehicle system components thermal conditioning |
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2020
- 2020-05-13 CN CN202010402335.1A patent/CN111594301B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5884477A (en) * | 1997-01-24 | 1999-03-23 | Honda Giken Kogyo Kabushiki Kaisha | Fuel supply control system for internal combustion engines |
| JP2007107397A (en) * | 2005-10-11 | 2007-04-26 | Honda Motor Co Ltd | Catalyst temperature estimating device |
| KR20100082601A (en) * | 2009-01-09 | 2010-07-19 | 콘티넨탈 오토모티브 시스템 주식회사 | Method for preventing catalyst overheating |
| CN109386353A (en) * | 2017-08-04 | 2019-02-26 | 福特全球技术公司 | System and method for vehicle system components thermal conditioning |
| CN107780996A (en) * | 2017-09-27 | 2018-03-09 | 无锡威孚力达催化净化器有限责任公司 | A kind of control device and control method of the temperature raising of choke valve assisting DPF regeneration |
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