CN113047970A - Method and device for rapidly increasing exhaust temperature in alpine plateau - Google Patents
Method and device for rapidly increasing exhaust temperature in alpine plateau Download PDFInfo
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- CN113047970A CN113047970A CN202110239459.7A CN202110239459A CN113047970A CN 113047970 A CN113047970 A CN 113047970A CN 202110239459 A CN202110239459 A CN 202110239459A CN 113047970 A CN113047970 A CN 113047970A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
- F02D41/405—Multiple injections with post injections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The embodiment of the application discloses a method and a device for rapidly increasing exhaust temperature in an alpine plateau, which can meet PEMS requirements without complex environmental correction. The application includes: acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value; obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the forward and backward heating mode of the engine; acquiring an initial SCR upstream temperature of an engine; judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not, if so, controlling the engine to enter a heating mode so as to improve the exhaust temperature of the engine; obtaining the latest SCR upstream temperature of the engine again; and judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not, and if so, controlling the engine to exit the heating mode.
Description
Technical Field
The embodiment of the application relates to the technical field of engines, in particular to a method and a device for rapidly improving exhaust temperature in alpine plateau.
Background
The SCR aftertreatment system requires the bed temperature of the catalyst to reach a higher value to realize higher NOx conversion efficiency, so the engine needs to improve the exhaust temperature under a small-load working condition by an effective control means to meet the limit of an emission regulation, and a common thermal management improvement measure is to enter or exit a rapid heating mode through the upstream temperature condition of the SCR.
In the current bosch strategy, the SCR upstream temperature conditions for the forward and reverse rapid heating modes are: the rapid heating mode is entered when the SCR upstream temperature is below a threshold and exits when above the threshold. In the normal temperature and pressure area, the calibration is that the temperature is lower than 220 ℃ (a) entering, and the temperature is higher than 250 ℃ (b) exiting; in cold areas or high-altitude areas, in order to increase exhaust temperature, 260 ℃ (a + c) entry needs to be set, and 300 ℃ (b + d) exit needs to be set, but the current strategy does not support correction of ambient temperature or ambient pressure on the exhaust temperature condition of a forward and backward rapid heating mode, and the normal temperature and normal pressure area and the three-high area cannot be considered at the same time.
In order to solve the problems, the conventional method is to modify the closing degree of the throttle valve, the rail pressure, the timing and the opening degree of the EGR valve one by one through complex environmental modification, and different environmental temperatures and pressures under different working conditions need to be considered and modified into different values.
Disclosure of Invention
The embodiment of the application provides a method and a device for rapidly increasing exhaust temperature in an alpine plateau, and the PEMS requirement can be met without complex environmental correction.
The first aspect of the embodiment of the application provides a method for rapidly increasing exhaust temperature in an alpine plateau, which comprises the following steps:
acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode;
acquiring an initial SCR upstream temperature of the engine;
judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not, and if so, controlling the engine to enter a heating mode;
obtaining the latest SCR upstream temperature of the engine again;
and judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not, and if so, controlling the engine to exit the heating mode.
Optionally, after the determining whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value, the method further includes:
if not, the exhaust temperature of the engine is continuously increased.
Optionally, before obtaining the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value according to the environmental information data, the method further includes:
creating a first function of the lower limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
and creating a second function of the upper limit value of the SCR upstream temperature, the ambient temperature value, the ambient pressure value, the rotating speed value and the oil quantity value.
Optionally, the obtaining of the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value according to the environmental information data includes:
confirming the obtained environmental temperature value, environmental pressure value, rotating speed value and oil quantity value according to the environmental information data;
substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the first function to obtain the SCR upstream temperature lower limit value;
and substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the second function to obtain the SCR upstream temperature upper limit value.
Optionally, after the controlling the engine to exit the rapid heating mode, the method further comprises:
monitoring SCR upstream temperature of the engine in real time.
The embodiment of this application in the second aspect provides a device that high and cold plateau improves exhaust temperature fast, includes:
the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring current environmental information data of an engine, and the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
the acquisition unit is used for acquiring an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, and the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode advancing and retreating;
a second acquisition unit for acquiring an initial SCR upstream temperature of the engine;
the first judgment unit is used for judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not;
the first control unit is used for controlling the engine to enter a heating mode after the first judging unit judges that the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a third acquisition unit configured to acquire a latest SCR upstream temperature of the engine again;
the second judging unit is used for judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not;
a second control unit configured to control the engine to exit the heating mode after the second determination unit determines that the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value.
Optionally, after the second determining unit, the apparatus further includes:
a raising unit configured to continue raising the exhaust temperature of the engine after the second determination unit determines that the latest SCR upstream temperature is lower than or equal to the SCR upstream temperature upper limit value.
Optionally, before the obtaining unit, the apparatus further includes:
the first establishing unit is used for establishing a first function of the lower limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
and the second creating unit is used for creating a second function of the upper limit value of the SCR upstream temperature and four numerical values of an ambient temperature value, an ambient pressure value, a rotating speed value and an oil quantity value.
Optionally, the obtaining unit includes:
the confirming module is used for confirming the obtained environmental temperature value, environmental pressure value, rotating speed value and oil quantity value according to the environmental information data;
the first substituting module is used for substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the first function to obtain the SCR upstream temperature lower limit value;
and the second substituting module is used for substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the second function to obtain the SCR upstream temperature upper limit value.
Optionally, after the second control unit, the apparatus further includes:
and the real-time monitoring unit is used for monitoring the SCR upstream temperature of the engine in real time.
The third aspect of the embodiment of the application provides a device for rapidly increasing exhaust temperature in alpine plateau, including:
the device comprises a processor, a memory, an input and output unit and a bus;
the processor is connected with the memory, the input and output unit and the bus;
the processor performs the following operations:
acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode;
acquiring an initial SCR upstream temperature of the engine;
judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not, and if so, controlling the engine to enter a heating mode;
obtaining the latest SCR upstream temperature of the engine again;
and judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not, and if so, controlling the engine to exit the heating mode.
An embodiment of the present application provides a computer-readable storage medium, where a program is stored on the computer-readable storage medium, and when the program is executed on a computer, the method for quickly increasing an exhaust temperature in an alpine plateau according to any one of the first aspect above is performed.
According to the technical scheme, the embodiment of the application has the following advantages:
in the method, the upper limit value and the lower limit value of the SCR upstream temperature of the heating mode entering and exiting can be calibrated according to the ambient temperature, the ambient pressure, the rotating speed and the oil mass by increasing the links of correcting the temperature exhaust conditions of the forward and backward heating modes such as the ambient temperature or the ambient pressure, and the PEMS requirement can be met without complex environmental correction.
Drawings
FIG. 1 is a schematic flow chart illustrating an embodiment of a method for rapidly increasing exhaust temperature in an alpine plateau according to the present disclosure;
FIG. 2 is a schematic flow chart illustrating another embodiment of a method for rapidly increasing exhaust temperature in an alpine altitude according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating an embodiment of an apparatus for rapidly increasing exhaust temperature in an alpine plateau according to the present disclosure;
FIG. 4 is a schematic flow chart illustrating another embodiment of an apparatus for rapidly increasing exhaust temperature in an alpine altitude according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of another embodiment of the device for rapidly increasing the exhaust temperature in the alpine plateau according to the embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. 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 scope of protection of the present application.
The embodiment of the application provides a method and a device for rapidly increasing exhaust temperature in an alpine plateau, and the PEMS requirement can be met without complex environmental correction.
Referring to fig. 1, an embodiment of a method for rapidly increasing an exhaust temperature in an alpine altitude in an embodiment of the present application includes:
101. acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
in the embodiment of the present application, the SCR upstream temperature conditions of the forward and backward heating mode are: and entering a heating mode when the temperature of the SCR upstream is lower than a lower limit value, and exiting the heating mode when the temperature of the SCR upstream is higher than an upper limit value. For example, in the normal temperature and pressure region, the calibration is that the temperature is lower than 220 ℃ (a) entering, and the temperature is higher than 250 ℃ (b) exiting; in cold areas or high-altitude areas, in order to increase exhaust temperature, people need to set 260 ℃ (a + c) to enter and 300 ℃ (b + d) to exit, and the current strategy does not support correction of ambient temperature or ambient pressure on exhaust temperature conditions of a forward and backward heating mode, so that normal temperature and normal pressure areas and three-high areas cannot be considered.
Therefore, in order to improve the exhaust temperature, the embodiment of the application increases the correction of the environmental temperature or the environmental pressure on the exhaust temperature condition of the forward and backward heating mode, namely acquires the current environmental information data of the engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value, the upper limit value and the lower limit value of the SCR upstream temperature used as the basis for judging whether the engine enters or exits the heating mode can be calibrated according to the environmental temperature, the environmental pressure, the rotating speed and the oil quantity, the upper limit value and the lower limit value are functions of the four factors, and the corresponding correction values under different environmental temperatures and pressures under different working conditions can be obtained through.
102. Obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode;
it should be noted that, in the embodiment of the present application, functional relational expressions of the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value with the ambient temperature, the ambient pressure, the rotation speed, and the oil amount are respectively established in advance, and after the current ambient temperature value, the ambient pressure value, the rotation speed value, and the oil amount value of the engine are obtained, the functional relational expressions may be directly substituted into the relational expressions to calculate the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value.
The SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine forward and backward heating mode, and the SCR upstream temperature lower limit value is smaller than the SCR upstream temperature upper limit value.
103. Acquiring an initial SCR upstream temperature of the engine;
in the embodiment of the present application, the lower SCR upstream temperature limit and the upper SCR upstream temperature limit are used as exhaust temperature conditions for measuring the forward and backward heating mode of the engine, and need to be compared with the SCR upstream temperature of the engine, so in order to determine whether the engine is currently in the heating mode, the current SCR upstream temperature of the engine needs to be obtained, and may also be the initial SCR upstream temperature.
104. Judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value, if so, executing a step 105;
it should be noted that, in the embodiment of the present application, since the SCR aftertreatment system requires that the bed temperature of the catalyst reaches a higher value or more to achieve higher NOx conversion efficiency, the engine needs to raise the exhaust temperature, first, it is determined whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit, if so, it is determined that the exhaust temperature needs to be raised, and step 105 is specifically executed.
105. Controlling the engine to enter a heating mode;
it should be noted that in the present embodiment, after entering the heating mode, the throttle closing degree is larger, the injection timing and the rail pressure are lower, and near-after injection is released. The heating mode reduces the air intake quantity and the combustion and realizes the temperature rise of the exhaust temperature through the measures.
106. Obtaining the latest SCR upstream temperature of the engine again;
it should be noted that, in the embodiment of the present application, after the engine enters the heating mode for a period of time, in order to determine whether the current temperature has been reached, the current SCR upstream temperature of the engine, that is, the latest SCE upstream temperature, needs to be obtained again.
The specific judgment method is shown in step 107.
107. Judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value, if so, executing step 108;
it should be noted that in the embodiment of the present application, the exhaust temperature of the engine may not be infinitely high, and the heating mode may be exited after the bed temperature required by the SCR aftertreatment system to be reached by the catalyst is satisfied, and a temperature at which higher NOx conversion efficiency can be achieved.
In the embodiment of the present application, it is determined whether the obtained latest SCR upstream temperature is higher than the SCR upstream temperature upper limit, and if yes, step 108 is executed.
108. Controlling the engine to exit the heating mode.
It should be noted that, in the embodiment of the present application, it is determined whether the obtained latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value, and if so, it is determined that the exhaust temperature meets the requirement, and the heating mode may be exited without continuing heating.
In the embodiment of the application, the upper limit value and the lower limit value of the SCR upstream temperature of the heating mode entering and exiting can be calibrated according to the ambient temperature, the ambient pressure, the rotating speed and the oil mass by increasing the links of correcting the temperature exhaust conditions of the forward and backward heating modes such as the ambient temperature or the ambient pressure, and the PEMS requirement can be met without complex environmental correction.
The method for rapidly increasing the exhaust temperature in the alpine plateau is roughly described above, and a detailed description will be given below.
Referring to fig. 2, another embodiment of the method for rapidly increasing the exhaust temperature in the alpine altitude of the present application includes:
201. acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
in the embodiment of the present application, step 201 is similar to step 101 described above, and is not described herein again.
202. Creating a first function of the lower limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
it should be noted that, in the embodiment of the present application, because the correction values under different conditions and different ambient temperatures and pressures are different, in order to obtain a correction value that meets the current environment, a first function related to the lower limit value of the temperature upstream of the SCE needs to be created.
203. Creating a second function of the upper limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
in the embodiment of the present application, the first function and the second function are two different relational expressions.
204. Confirming the obtained environmental temperature value, environmental pressure value, rotating speed value and oil quantity value according to the environmental information data;
205. substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the first function to obtain the SCR upstream temperature lower limit value;
206. substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the second function to obtain the SCR upstream temperature upper limit value;
it should be noted that, in the embodiment of the present application, after the current ambient temperature value, the ambient pressure value, the rotation speed value, and the oil quantity value are acquired, the values are respectively substituted into the created first function and the created second function, so as to obtain the required SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value.
207. Acquiring an initial SCR upstream temperature of the engine;
in the embodiment of the present application, step 207 is similar to step 103 described above, and is not described herein again.
208. Judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value, if so, executing a step 210; if not, go to step 209;
it should be noted that, in the embodiment of the present application, because the SCR aftertreatment system requires that the bed temperature of the catalyst reaches a higher value or more, so as to achieve higher NOx conversion efficiency, the engine needs to raise the exhaust temperature, first, it is determined whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit, if so, it is determined that the exhaust temperature needs to be raised, and step 210 is specifically executed; if not, it indicates that the current SCR upstream temperature can meet the requirements of the SCR aftertreatment system, and step 209 is specifically executed.
209. Not operating the engine;
it should be noted that, in the embodiment of the present application, if the initial SCR upstream temperature is higher than or equal to the SCR upstream temperature lower limit value, it indicates that the current SCR upstream temperature can meet the requirement of the SCR aftertreatment system, and the engine does not need to enter the heating mode to raise the exhaust temperature, and therefore, the engine is not operated.
210. Controlling the engine to enter a heating mode;
211. obtaining the latest SCR upstream temperature of the engine again;
in the embodiment of the present application, steps 210 to 211 are similar to steps 105 to 106 described above, and are not described herein again.
212. Judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value, if so, executing step 214; if not, go to step 213;
it should be noted that in the embodiment of the present application, the exhaust temperature of the engine may not be infinitely high, and the heating mode may be exited after the bed temperature required by the SCR aftertreatment system to be reached by the catalyst is satisfied, and a temperature at which higher NOx conversion efficiency can be achieved.
In the embodiment of the present application, it is determined whether the obtained latest SCR upstream temperature is higher than the SCR upstream temperature upper limit, if yes, step 214 is executed; if not, go to step 213.
213. Continuing to raise the exhaust temperature of the engine, and re-executing step 212;
it should be noted that, in the embodiment of the present application, it is determined that the obtained latest SCR upstream temperature is lower than or equal to the SCR upstream temperature upper limit value, and it is indicated that there is a room for increasing the exhaust gas temperature, and the engine is continuously subjected to thermal management.
214. Controlling the engine to exit the heating mode.
In the embodiment of the present application, step 214 is similar to step 108 described above, and is not described herein again.
215. Monitoring SCR upstream temperature of the engine in real time.
It should be noted that in the embodiment of the present application, after the engine exits the heating mode, the upstream temperature of the engine may be continuously monitored to know the current temperature situation in real time.
In the embodiment of the application, the exhaust temperature conditions of the forward and backward heating mode are corrected by increasing the ambient temperature, the ambient pressure and the like, specifically, the functional relation between the upper and lower limit values of the SCR upstream temperature and four factors of the ambient temperature, the ambient pressure, the rotating speed and the oil quantity is established for calibration, and the closing degree, the rail pressure, the timing and the EGR valve opening degree of the throttle valves are corrected one by one without complex environmental correction.
The method for rapidly increasing the exhaust temperature of the alpine plateau is described above, and the device for rapidly increasing the exhaust temperature of the alpine plateau will be described below.
Referring to fig. 3, an embodiment of the apparatus for rapidly increasing the exhaust temperature in an alpine altitude in the embodiment of the present application includes:
the first obtaining unit 301 is configured to obtain current environmental information data of the engine, where the environmental information data includes an environmental temperature value, an environmental pressure value, a rotation speed value, and an oil amount value;
an obtaining unit 302, configured to obtain an SCR upstream temperature lower limit and an SCR upstream temperature upper limit according to the environmental information data, where the SCR upstream temperature lower limit and the SCR upstream temperature upper limit are used as exhaust temperature conditions for measuring an engine heating mode;
a second obtaining unit 303 for obtaining an initial SCR upstream temperature of the engine;
a first judging unit 304, configured to judge whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a first control unit 305 for controlling the engine to enter a heating mode after the first judgment unit 304 judges that the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a third obtaining unit 306 for obtaining the latest SCR upstream temperature of the engine again;
a second judging unit 307, configured to judge whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value;
a second control unit 308, configured to control the engine to exit the heating mode after the second judging unit 307 judges that the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value.
In the embodiment of the application, the upper limit value and the lower limit value of the SCR upstream temperature of the heating mode entering and exiting can be calibrated according to the ambient temperature, the ambient pressure, the rotating speed and the oil mass by increasing the links of correcting the temperature exhaust conditions of the forward and backward heating modes such as the ambient temperature or the ambient pressure, and the PEMS requirement can be met without complex environmental correction.
The functions of the units of the device for rapidly increasing the exhaust temperature in the alpine plateau are generally described above, and the functions of the units of the device for rapidly increasing the exhaust temperature in the alpine plateau are described in detail below.
Referring to fig. 4, in an embodiment of the present application, another embodiment of a device for rapidly increasing an exhaust temperature in an alpine altitude includes:
a first obtaining unit 401, configured to obtain current environmental information data of an engine, where the environmental information data includes an environmental temperature value, an environmental pressure value, a rotation speed value, and an oil amount value;
a first creating unit 402, configured to create a first function of the SCR upstream temperature lower limit value, the ambient temperature value, the ambient pressure value, the rotation speed value, and the oil amount value;
a second creating unit 403, configured to create a second function of the SCR upstream temperature upper limit value, the ambient temperature value, the ambient pressure value, the rotation speed value, and the oil amount value;
an obtaining unit 404, configured to obtain an SCR upstream temperature lower limit and an SCR upstream temperature upper limit according to the environmental information data, where the SCR upstream temperature lower limit and the SCR upstream temperature upper limit are used as exhaust temperature conditions for measuring an engine heating mode;
optionally, the obtaining unit 404 may further include:
the confirming module 4041 is configured to confirm the acquired environmental temperature value, environmental pressure value, rotation speed value, and oil quantity value according to the environmental information data;
a first entering module 4042, configured to substitute the obtained ambient temperature value, the ambient pressure value, the rotation speed value, and the oil amount value into the first function to obtain the SCR upstream temperature lower limit value;
a second generation module 4043, configured to substitute the obtained ambient temperature value, the ambient pressure value, the rotation speed value, and the oil amount value into the second function to obtain the SCR upstream temperature upper limit value.
A second obtaining unit 405 for obtaining an initial SCR upstream temperature of the engine;
a first judging unit 406, configured to judge whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a first control unit 407 for controlling the engine to enter a heating mode after the first judgment unit 406 judges that the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a third obtaining unit 408 for obtaining the latest SCR upstream temperature of the engine again;
a second determination unit 409, configured to determine whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value;
a raising unit 410 configured to continue raising the exhaust temperature of the engine after the second determination unit 409 determines that the latest SCR upstream temperature is lower than or equal to the SCR upstream temperature upper limit value;
a second control unit 411, configured to control the engine to exit the heating mode after the second determination unit 409 determines that the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value;
a real-time monitoring unit 412 for monitoring the SCR upstream temperature of the engine in real-time.
In the embodiment of the present application, the functions of each unit module correspond to the steps in the embodiments shown in fig. 1 to fig. 2, and are not described herein again.
Referring to fig. 5, another embodiment of the apparatus for rapidly increasing the exhaust temperature in an alpine altitude in the embodiment of the present application includes:
a processor 501, a memory 502, an input-output unit 503, and a bus 504;
the processor 501 is connected with the memory 502, the input/output unit 503 and the bus 504;
the processor 501 performs the following operations:
acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode;
acquiring an initial SCR upstream temperature of the engine;
judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not, and if so, controlling the engine to enter a heating mode;
obtaining the latest SCR upstream temperature of the engine again;
and judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not, and if so, controlling the engine to exit the heating mode.
In this embodiment, the functions of the processor 501 correspond to the steps in the embodiments shown in fig. 1 to fig. 2, and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
Claims (10)
1. A method for rapidly increasing exhaust temperature in alpine plateau is characterized by comprising the following steps:
acquiring current environmental information data of an engine, wherein the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
obtaining an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, wherein the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode;
acquiring an initial SCR upstream temperature of the engine;
judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not, and if so, controlling the engine to enter a heating mode;
obtaining the latest SCR upstream temperature of the engine again;
and judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not, and if so, controlling the engine to exit the heating mode.
2. The method of claim 1, wherein after said determining whether the latest SCR upstream temperature is greater than the SCR upstream temperature upper limit value, the method further comprises:
if not, the exhaust temperature of the engine is continuously increased.
3. The method of claim 1, wherein prior to said deriving a lower SCR upstream temperature limit and an upper SCR upstream temperature limit from said environmental information data, the method further comprises:
creating a first function of the lower limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
and creating a second function of the upper limit value of the SCR upstream temperature, the ambient temperature value, the ambient pressure value, the rotating speed value and the oil quantity value.
4. The method of claim 3, wherein the deriving a lower SCR upstream temperature limit and an upper SCR upstream temperature limit from the environmental information data comprises:
confirming the obtained environmental temperature value, environmental pressure value, rotating speed value and oil quantity value according to the environmental information data;
substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the first function to obtain the SCR upstream temperature lower limit value;
and substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the second function to obtain the SCR upstream temperature upper limit value.
5. The method of any of claims 1-4, further comprising, after the controlling the engine to exit the rapid heating mode:
monitoring SCR upstream temperature of the engine in real time.
6. The utility model provides a device for high and cold plateau improves exhaust temperature fast which characterized in that includes:
the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring current environmental information data of an engine, and the environmental information data comprises an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
the acquisition unit is used for acquiring an SCR upstream temperature lower limit value and an SCR upstream temperature upper limit value according to the environmental information data, and the SCR upstream temperature lower limit value and the SCR upstream temperature upper limit value are used as exhaust temperature conditions for measuring the engine heating mode advancing and retreating;
a second acquisition unit for acquiring an initial SCR upstream temperature of the engine;
the first judgment unit is used for judging whether the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value or not;
the first control unit is used for controlling the engine to enter a heating mode after the first judging unit judges that the initial SCR upstream temperature is lower than the SCR upstream temperature lower limit value;
a third acquisition unit configured to acquire a latest SCR upstream temperature of the engine again;
the second judging unit is used for judging whether the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value or not;
a second control unit configured to control the engine to exit the heating mode after the second determination unit determines that the latest SCR upstream temperature is higher than the SCR upstream temperature upper limit value.
7. The apparatus according to claim 6, wherein after the second determination unit, the apparatus further comprises:
a raising unit configured to continue raising the exhaust temperature of the engine after the second determination unit determines that the latest SCR upstream temperature is lower than or equal to the SCR upstream temperature upper limit value.
8. The apparatus of claim 6, wherein prior to the obtaining unit, the apparatus further comprises:
the first establishing unit is used for establishing a first function of the lower limit value of the SCR upstream temperature, an environmental temperature value, an environmental pressure value, a rotating speed value and an oil quantity value;
and the second creating unit is used for creating a second function of the upper limit value of the SCR upstream temperature and four numerical values of an ambient temperature value, an ambient pressure value, a rotating speed value and an oil quantity value.
9. The apparatus of claim 8, wherein the obtaining unit comprises:
the confirming module is used for confirming the obtained environmental temperature value, environmental pressure value, rotating speed value and oil quantity value according to the environmental information data;
the first substituting module is used for substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the first function to obtain the SCR upstream temperature lower limit value;
and the second substituting module is used for substituting the obtained environmental temperature value, the environmental pressure value, the rotating speed value and the oil quantity value into the second function to obtain the SCR upstream temperature upper limit value.
10. The apparatus according to any one of claims 6 to 9, characterized in that after the second control unit, the apparatus further comprises:
and the real-time monitoring unit is used for monitoring the SCR upstream temperature of the engine in real time.
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