CN116263119A - Automobile exhaust emission control method, system, electronic device and medium - Google Patents

Automobile exhaust emission control method, system, electronic device and medium Download PDF

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Publication number
CN116263119A
CN116263119A CN202111527700.2A CN202111527700A CN116263119A CN 116263119 A CN116263119 A CN 116263119A CN 202111527700 A CN202111527700 A CN 202111527700A CN 116263119 A CN116263119 A CN 116263119A
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pedal
emission area
optimal
transmission ratio
torque value
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CN116263119B (en
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叶绵雨
任志远
赖伟东
姜云龙
王汝维
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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Priority to PCT/CN2022/120382 priority patent/WO2023109236A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/16—Control strategies specially adapted for achieving a particular effect for reducing engine exhaust emissions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/188—Controlling power parameters of the driveline, e.g. determining the required power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • 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
    • 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
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention provides an automobile exhaust emission control method and system, wherein the method comprises the following steps: acquiring a pedal curve, a speed change line and an optimal original emission area of an engine corresponding to a current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition; calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line; and controlling the vehicle through the torque value and the transmission ratio to finish the tail gas emission control of the current driving mode. The invention effectively reduces the resources for carrying out a large number of tail gas emission control calibration and tests in different driving modes, improves the efficiency of emission control, reduces the development difficulty, and reduces the development cost and period.

Description

Automobile exhaust emission control method, system, electronic device and medium
Technical Field
The invention relates to the technical field of automobile emission development and application, in particular to an automobile exhaust emission control method and system.
Background
The global driving mode function is an important function of driving the vehicle. Through switching of driving modes, a user can conveniently adjust the driving performance of the vehicle such as driving comfort, fuel economy, power acceleration and the like; and the function is linked with functions such as multimedia display, atmosphere light and the like, and provides a whole-vehicle full-environment and immersive driving experience for a user.
At present, along with the increase of driving modes of vehicles, different pedal curves and gear shift points of a gear shift line need to be developed for different driving modes so as to reflect the difference of driving styles in different driving modes, and the rotating speeds and the torques of engines in different driving modes are different, so that the requirements on controlling emission pollutants are higher, and along with the increase of the driving modes of the vehicles, the difficulty of calibrating a large amount of data of an engine control unit and a transmission control unit is also increased.
Disclosure of Invention
In order to solve the problems of increasing the workload and the difficulty of calibration and verification of pollutant emission in different driving modes, the invention provides a tail gas emission control method and a tail gas emission control system based on different driving modes, which realize that the emission in different driving modes meets the requirements of emission regulation limit values.
The first aspect of the invention provides an automobile exhaust emission control method, comprising the following steps:
acquiring a pedal curve, a speed change line and an optimal original emission area of an engine corresponding to a current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition;
calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line;
and controlling the vehicle through the torque value and the transmission ratio to finish the tail gas emission control of the current driving mode.
Further, the calibrating the pedal curve and the gear shift line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the gear shift line includes:
taking a part of pedal curves corresponding to the incomplete ignition of the catalyst in the pedal curves as target pedal curves of the optimal original emission area, and marking torque values from the target pedal curves;
and taking the part of the gear shift lines corresponding to the incomplete ignition of the catalyst as a target gear shift line of the optimal original emission area, and marking the transmission ratio from the target gear shift line.
Further, the step of using the partial pedal curve corresponding to the incomplete ignition of the catalyst as the target pedal curve of the optimal original emission area, and determining the torque value from the target pedal curve includes:
calculating to obtain the engine speed according to the required power of the optimal original emission area;
and determining a torque value from the target pedal curve according to the engine speed and the pedal opening.
Further, the step of using the partial shift line corresponding to the incomplete ignition of the catalyst as the target shift line of the optimal original emission area, and determining the transmission ratio from the target shift line includes:
acquiring a vehicle speed corresponding to the required power of the optimal original emission area;
and determining a transmission ratio from the target speed change line according to the vehicle speed and the pedal opening.
Further, before the vehicle is controlled by the torque value and the transmission ratio, the method further includes:
and under the current driving mode, verifying the torque value and the transmission ratio, and executing the control of the vehicle through the torque value and the transmission ratio after the torque value and the transmission ratio are successfully verified.
Further, the required power of the optimal raw emission area is calculated by the following formula:
Figure BDA0003410875220000031
wherein P is required,j For the power demand at j seconds, v j A is the vehicle speed at j seconds j Acceleration at j seconds, K r To overcome the factor of inertial resistance of the driveline during acceleration, TM is the mass of the vehicle, f 0 、f 1 、f 2 The load coefficients of the test roads are all the load coefficients of the test roads.
Further, the preset conditions are: the original emission amount of each pollutant is smaller than a preset value, and the optimal original emission area is as follows: the collection of raw emission data is satisfied that each of the pollutants has an raw emission less than a preset value.
A second aspect of the present invention provides an automobile exhaust emission control system, comprising:
the data acquisition and calculation module is used for acquiring a pedal curve, a speed change line and an optimal original emission area of the engine, which correspond to the current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition;
the data calibration module is used for calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line;
and the vehicle control module is used for controlling the vehicle through the torque value and the transmission ratio to complete the exhaust emission control of the current driving mode.
A third aspect of the present invention provides an electronic device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the automobile exhaust emission control method according to any one of the first aspects described above when executing the computer program.
A fourth aspect of the present invention provides a computer-readable storage medium comprising a stored computer program, wherein the computer program, when run, controls an apparatus in which the computer-readable storage medium is located to execute the automobile exhaust emission control method according to any one of the first aspects above.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides an automobile exhaust emission control method and system, wherein the method comprises the following steps: acquiring a pedal curve, a speed change line and an optimal original emission area of an engine corresponding to a current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition; calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line; and controlling the vehicle through the torque value and the transmission ratio to finish the tail gas emission control of the current driving mode. The invention effectively reduces the resources for carrying out a large number of tail gas emission control calibration and tests in different driving modes, improves the efficiency of emission control, reduces the development difficulty, and reduces the development cost and period.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an automobile exhaust emission control method provided in embodiment 1 of the present invention;
fig. 2 is a flowchart of an automobile exhaust emission control method provided in embodiment 2 of the present invention;
fig. 3 is a flowchart of an automobile exhaust emission control method provided in embodiment 3 of the present invention;
fig. 4 is a device diagram of an exhaust emission control system of an automobile according to embodiment 4 of the present invention;
fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the step numbers used herein are for convenience of description only and are not limiting as to the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
With the implementation of the national sixth emission regulation, the regulation requirement of pollutant emission capable of manually selecting a driving mode is newly increased, and the regulation clearly defines that all the manually selectable driving modes of the vehicle are required to meet the pollutant emission limit requirement for emission test. Because different driving modes relate to different driving style demands, a great amount of data calibration work of an engine control unit and a transmission control unit needs to be carried out, and the increasing of the driving modes has great influence on pollutant emission control difficulty and resource investment. In order to solve the technical problems, the embodiment of the invention provides an automobile exhaust emission control method and system.
In a first aspect.
Referring to fig. 1, embodiment 1 of the present invention provides a method for controlling exhaust emission of an automobile, including:
s100, acquiring a pedal curve, a speed change line and an optimal original emission area of the engine corresponding to the current driving mode, and calculating the required power of the optimal original emission area.
Wherein the optimal raw emission area is a set of raw emission data satisfying a preset condition.
Preferably, the preset condition is: the original emission amount of each pollutant is smaller than a preset value, and the optimal original emission area is as follows: the collection of raw emission data is satisfied that each of the pollutants has an raw emission less than a preset value.
The driver selects different driving modes by adjusting the vehicle running performance such as the driving comfort, the fuel economy, the power acceleration, and the like. The pedal curve, the speed change line and the optimal original emission area of the engine corresponding to different driving modes are different, and each driving mode has a corresponding pedal curve and speed change line. The abscissa of the pedal curve is the rotating speed of the engine, the ordinate is the pedal opening, and the rotating speeds of different engines and the pedal opening correspond to different engine torque values. The abscissa of the speed change line is the speed of the vehicle, the ordinate is the pedal opening, and different speeds and pedal openings correspond to different transmission ratios. The original emission data is also called an engine pollutant characteristic diagram, the abscissa of the original emission data is the rotating speed of the engine, the ordinate is the torque value of the engine, the right side is the pollutant emission amount indication, in the original emission data, blue represents that the pollutant is very low, green represents that the pollutant is very high, and red represents that the pollutant is very high. The optimal raw emission area is a section of raw emission data where all pollutants can be balanced best, i.e. a section where the emission amount of each pollutant is smaller than a preset value. The required power of the optimal raw emission area is calculated by the following formula:
Figure BDA0003410875220000071
wherein P is required,j For the power demand at j seconds, v j A is the vehicle speed at j seconds j Acceleration at j seconds, K r To overcome the factor of inertial resistance of the driveline during acceleration, TM is the mass of the vehicle, f 0 、f 1 、f 2 The load coefficients of the test roads are all the load coefficients of the test roads.
It is understood that the interval of the rotational speed of the engine and the interval of the torque of the engine corresponding to the optimal original emission area can be further determined by acquiring the obtained pedal curve, the shift line and the optimal original emission area of the engine corresponding to the current driving mode.
And S200, calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area, and obtaining a torque value of the pedal curve and a transmission ratio of the speed change line.
The data calibration refers to calibration of data. The torque value can be calculated by the calculation formula among the required power, the torque, the rotating speed and the power, and the transmission ratio is calculated by the calculation formula among the vehicle speed, the rotating speed and the transmission ratio. The calculation formula among the torque, the rotating speed and the power is as follows: power (P) ≡torque (T) ×rotational speed (N)/9550. The calculation formula among the speed, the rotating speed and the transmission ratio is as follows: vehicle speed = 0.377 x wheel radius x engine speed/gear ratio x final speed reduction ratio.
It can be understood that the torque value in the pedal curve calculated by the required power and the transmission ratio in the calculated transmission line are calibrated respectively to obtain the torque value of the pedal curve and the transmission ratio of the transmission line.
And S300, controlling the vehicle through the torque value and the transmission ratio, and completing the exhaust emission control of the current driving mode.
The torque value and the transmission ratio obtained through calibration are used for controlling parameters such as the rotating speed of an engine, the torque value of the engine, the pedal opening, the vehicle speed and the like of the vehicle in the current driving mode so as to meet the requirement that the emission of the automobile exhaust meets the standard in the current driving mode.
The automobile exhaust emission control method provided by the embodiment 1 of the invention effectively reduces the resources required for carrying out a large number of exhaust emission control calibrations and tests in different driving modes, improves the efficiency of emission control, reduces the development difficulty, and reduces the development cost and period.
Referring to fig. 2, embodiment 2 of the present invention provides an exhaust emission control method for an automobile, wherein steps S100 to S300 are the same as those in embodiment 1, and the difference is that step S200 includes: step S210 and step S220. The execution sequence of the step S210 and the step S220 is one of parallel execution and sequential execution, and in the sequential execution, the step S210 may be executed before the step S220 or may be executed after the step S220. Specifically:
and S210, taking a part of pedal curves corresponding to the incomplete ignition of the catalyst in the pedal curves as target pedal curves of the optimal original emission area, and marking out torque values from the target pedal curves.
It should be noted that, when the catalyst is completely ignited, the control parameter of the pedal curve is unique, i.e. the torque value is unique; when the catalyst is not fully ignited, the control parameters of the pedal curve are not unique, namely the torque value is not unique; after the catalyst heating is completed, the driving mode selected by the driver is switched back. Namely, selecting a part of pedal curves corresponding to the incomplete ignition of the catalyst, taking the selected curves as target pedal curves of the optimal original emission area, and further marking the target pedal curves to obtain torque values.
And S220, taking a part of the gear shift lines corresponding to the incomplete ignition of the catalyst as a target gear shift line of the optimal original emission area, and marking the transmission ratio from the target gear shift line.
It should be noted that, when the catalyst is completely ignited, the control parameter of the shift line is unique, that is, the transmission ratio is unique; when the catalyst is not fully ignited, the control parameters of the speed change line are not unique, namely the transmission ratio is not unique; after the catalyst heating is completed, the driving mode selected by the driver is switched back. Namely, selecting a part of the gear shift lines corresponding to the incomplete ignition of the catalyst, taking the selected gear shift lines as target gear shift lines of the optimal original emission area, and further marking the target gear shift lines to obtain the transmission ratio.
In a preferred embodiment of example 2, the step S210 includes the sub-steps of: step 211 and step 212, the step S220 includes the steps of: step 221 and step 222.
Step 211: and calculating the engine speed according to the required power of the optimal original emission area.
Step 212: and determining a torque value from the target pedal curve according to the engine speed and the pedal opening.
It can be understood that the engine speed can be calculated by a calculation formula among the torque, the rotation speed and the power, and then the target pedal curve is calibrated by the engine speed and the pedal opening to obtain a torque value. The calculation formula among the torque, the rotating speed and the power is as follows: power (P) ≡torque (T) ×rotational speed (N)/9550.
The step S220 includes:
step 221, obtaining a vehicle speed corresponding to the required power of the optimal original emission area.
Step 222, determining a transmission ratio from the target shift line according to the vehicle speed and the pedal opening.
It can be understood that the obtained vehicle speed is equal to the vehicle speed for calculating the required power, and the target speed change line is calibrated through the vehicle speed and the pedal opening degree to obtain the transmission ratio.
According to the automobile exhaust emission control method provided by the embodiment 2 and the preferred embodiment of the invention, the optimal area of the original exhaust of the engine before incomplete ignition of the catalyst is screened, the required power of the optimal area of the original exhaust is calculated, the target pedal curve and the target speed change line are selected, a large number of resources for exhaust emission control calibration and test in different driving modes are effectively reduced, the efficiency of emission control is improved, the development difficulty is reduced, and the development cost and period are reduced.
Referring to fig. 3, embodiment 3 of the present invention provides an exhaust emission control method for an automobile, wherein steps S100 to S200 are the same as those in embodiment 1, and the difference is that after step S200, the method includes:
and S400, verifying the torque value and the transmission ratio in the current driving mode, and executing the control of the vehicle through the torque value and the transmission ratio after the torque value and the transmission ratio are successfully verified, so as to complete the exhaust emission control in the current driving mode.
Before the vehicle is controlled, the torque value and the transmission ratio are verified, or the torque value and the transmission ratio are manually measured according to the torque value and the transmission ratio, so that the correctness and the effectiveness of the torque value and the transmission ratio are confirmed.
According to the automobile exhaust emission control method provided by the embodiment 3 of the invention, through combining with an emission regulation test method, the optimal original row area before incomplete ignition of the catalyst is screened, the required power of the area is determined through calculation, and the emission control method of different driving modes is realized through activating the pedal curve and the speed change line control of the optimal original row area, so that the development cost and the development period can be effectively reduced.
The second aspect.
Referring to fig. 4, embodiment 4 of the present invention provides an exhaust emission control system for an automobile, including:
the data acquisition and calculation module 100 is configured to acquire a pedal curve, a shift line, and an optimal original emission area of the engine corresponding to a current driving mode, and calculate a required power of the optimal original emission area.
Wherein the optimal raw emission area is a set of raw emission data satisfying a preset condition.
Preferably, the preset condition is: the original emission amount of each pollutant is smaller than a preset value, and the optimal original emission area is as follows: the collection of raw emission data is satisfied that each of the pollutants has an raw emission less than a preset value.
The driving modes are selected by adjusting the vehicle running performance such as the driving comfort, the fuel economy, the power acceleration, and the like. The pedal curve, the speed change line and the optimal original emission area of the engine corresponding to different driving modes are different, and each driving mode has a corresponding pedal curve and speed change line. The abscissa of the pedal curve is the rotating speed of the engine, the ordinate is the pedal opening, and the rotating speeds of different engines and the pedal opening correspond to different engine torque values. The abscissa of the speed change line is the speed of the vehicle, the ordinate is the pedal opening, and different speeds and pedal openings correspond to different transmission ratios. The original emission data is also called an engine pollutant characteristic diagram, the abscissa of the original emission data is the rotating speed of the engine, the ordinate is the torque value of the engine, the right side is the pollutant emission amount indication, in the original emission data, blue represents that the pollutant is very low, green represents that the pollutant is very high, and red represents that the pollutant is very high. The optimal raw emission area is a section of raw emission data where all pollutants can be balanced best, i.e. a section where the emission amount of each pollutant is smaller than a preset value. The required power of the optimal raw emission area is calculated by the following formula:
Figure BDA0003410875220000111
wherein P is required,j For the power demand at j seconds, v j A is the vehicle speed at j seconds j Acceleration at j seconds, K r To overcome the factor of inertial resistance of the driveline during acceleration, TM is the mass of the vehicle, f 0 、f 1 、f 2 The load coefficients of the test roads are all the load coefficients of the test roads.
It is understood that the interval of the rotational speed of the engine and the interval of the torque of the engine corresponding to the optimal original emission area can be further determined by acquiring the obtained pedal curve, the shift line and the optimal original emission area of the engine corresponding to the current driving mode.
And the data calibration module 200 is used for calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area respectively to obtain a torque value of the pedal curve and a transmission ratio of the speed change line.
The data calibration refers to calibration of data. The torque value can be calculated by the calculation formula among the required power, the torque, the rotating speed and the power, and the transmission ratio is calculated by the calculation formula among the vehicle speed, the rotating speed and the transmission ratio. The calculation formula among the torque, the rotating speed and the power is as follows: power (P) ≡torque (T) ×rotational speed (N)/9550. The calculation formula among the speed, the rotating speed and the transmission ratio is as follows: vehicle speed = 0.377 x wheel radius x engine speed/gear ratio x final speed reduction ratio.
It can be understood that the torque value in the pedal curve calculated by the required power and the transmission ratio in the calculated transmission line are calibrated respectively to obtain the torque value of the pedal curve and the transmission ratio of the transmission line.
The vehicle control module 300 is configured to control the vehicle according to the torque value and the transmission ratio, and complete exhaust emission control in the current driving mode.
The torque value and the transmission ratio obtained through calibration are used for controlling parameters such as the rotating speed of an engine, the torque value of the engine, the pedal opening, the vehicle speed and the like of the vehicle in the current driving mode so as to meet the requirement that the emission of the automobile exhaust meets the standard in the current driving mode.
The automobile exhaust emission control system provided by the embodiment 4 of the invention effectively reduces the resources required for carrying out a large number of exhaust emission control calibrations and tests in different driving modes, improves the efficiency of emission control, reduces the development difficulty, and reduces the development cost and period.
Embodiment 5 of the present invention provides an exhaust emission control system for an automobile, wherein the modules 100-300 are the same as those in embodiment 4, except that the module 200 is further configured to execute step S210 and step S220. The execution sequence of the step S210 and the step S220 is one of parallel execution and sequential execution, and in the sequential execution, the step S210 may be executed before the step S220 or may be executed after the step S220. Specifically:
and S210, taking a part of pedal curves corresponding to the incomplete ignition of the catalyst in the pedal curves as target pedal curves of the optimal original emission area, and marking out torque values from the target pedal curves.
It should be noted that, when the catalyst is completely ignited, the control parameter of the pedal curve is unique, i.e. the torque value is unique; when the catalyst is not fully ignited, the control parameters of the pedal curve are not unique, namely the torque value is not unique; after the catalyst heating is completed, the driving mode selected by the driver is switched back. Namely, selecting a part of pedal curves corresponding to the incomplete ignition of the catalyst, taking the selected curves as target pedal curves of the optimal original emission area, and further marking the target pedal curves to obtain torque values.
And S220, taking a part of the gear shift lines corresponding to the incomplete ignition of the catalyst as a target gear shift line of the optimal original emission area, and marking the transmission ratio from the target gear shift line.
It should be noted that, when the catalyst is completely ignited, the control parameter of the shift line is unique, that is, the transmission ratio is unique; when the catalyst is not fully ignited, the control parameters of the speed change line are not unique, namely the transmission ratio is not unique; after the catalyst heating is completed, the driving mode selected by the driver is switched back. Namely, selecting a part of the gear shift lines corresponding to the incomplete ignition of the catalyst, taking the selected gear shift lines as target gear shift lines of the optimal original emission area, and further marking the target gear shift lines to obtain the transmission ratio.
In a preferred implementation of embodiment 5, the module 200 is further configured to perform step 211, step 212, step 221, and step 222. Specifically:
step 211: and calculating the engine speed according to the required power of the optimal original emission area.
Step 212: and determining a torque value from the target pedal curve according to the engine speed and the pedal opening.
It can be understood that the engine speed can be calculated by a calculation formula among the torque, the rotation speed and the power, and then the target pedal curve is calibrated by the engine speed and the pedal opening to obtain a torque value. The calculation formula among the torque, the rotating speed and the power is as follows: power (P) ≡torque (T) ×rotational speed (N)/9550.
Step 221, obtaining a vehicle speed corresponding to the required power of the optimal original emission area.
Step 222, determining a transmission ratio from the target shift line according to the vehicle speed and the pedal opening.
It can be understood that the obtained vehicle speed is equal to the vehicle speed for calculating the required power, and the target speed change line is calibrated through the vehicle speed and the pedal opening degree to obtain the transmission ratio.
According to the automobile exhaust emission control system provided by the embodiment 5 and the preferred embodiment of the invention, through screening the original emission optimal area of the engine before incomplete ignition of the catalyst, the required power calculation of the original emission optimal area is performed, and the target pedal curve and the target speed change line are selected, so that a large number of resources for exhaust emission control calibration and test in different driving modes are effectively reduced, the emission control efficiency is improved, the development difficulty is reduced, and the development cost and period are reduced.
Embodiment 6 of the present invention provides an exhaust emission control system for an automobile, wherein the execution content of the module 100 and the execution content of the module 200 are the same as those in embodiment 4, and the difference is that the module 300 is used for:
and in the current driving mode, verifying the torque value and the transmission ratio, and after the torque value and the transmission ratio are successfully verified, executing the control of the vehicle through the torque value and the transmission ratio to complete the exhaust emission control of the current driving mode.
Before the vehicle is controlled, the torque value and the transmission ratio are verified, or the torque value and the transmission ratio are manually measured according to the torque value and the transmission ratio, so that the correctness and the effectiveness of the torque value and the transmission ratio are confirmed.
According to the automobile exhaust emission control system provided by the embodiment 6 of the invention, through combining an emission regulation test method, through screening an optimal original row area before incomplete ignition of a catalyst, through calculating and determining the required power of the area, and through activating pedal curves and variable speed line control of the optimal original row area, the emission control method of different driving modes is realized, and the development cost and period can be effectively reduced.
In a third aspect.
The present invention provides an electronic device including:
a processor, a memory, and a bus;
the bus is used for connecting the processor and the memory;
the memory is used for storing operation instructions;
the processor is configured to, by invoking the operation instruction, cause the processor to execute an operation corresponding to an automobile exhaust emission control method according to the first aspect of the present application.
In an alternative embodiment, an electronic device is provided, as shown in fig. 5, the electronic device 5000 shown in fig. 5 includes: a processor 5001 and a memory 5003. The processor 5001 is coupled to the memory 5003, e.g., via bus 5002. Optionally, the electronic device 5000 may also include a transceiver 5004. Note that, in practical applications, the transceiver 5004 is not limited to one, and the structure of the electronic device 5000 is not limited to the embodiment of the present application.
The processor 5001 may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. The processor 5001 may also be a combination of computing functions, e.g., including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.
Bus 5002 may include a path to transfer information between the aforementioned components. Bus 5002 may be a PCI bus or an EISA bus, among others. The bus 5002 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in fig. 5, but not only one bus or one type of bus.
The memory 5003 may be, but is not limited to, ROM or other type of static storage device, RAM or other type of dynamic storage device, which can store static information and instructions, EEPROM, CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disc, etc.), magnetic disk storage or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer.
The memory 5003 is used for storing application program codes for executing the aspects of the present application and is controlled by the processor 5001 for execution. The processor 5001 is operative to execute application code stored in the memory 5003 to implement what has been shown in any of the method embodiments described previously.
Among them, electronic devices include, but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and stationary terminals such as digital TVs, desktop computers, and the like.
A fourth aspect.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an automobile exhaust emission control method as shown in the first aspect of the present application.
Yet another embodiment of the present application provides a computer readable storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform the corresponding content of the foregoing method embodiments.

Claims (10)

1. An automobile exhaust emission control method, characterized by comprising:
acquiring a pedal curve, a speed change line and an optimal original emission area of an engine corresponding to a current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition;
calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line;
and controlling the vehicle through the torque value and the transmission ratio to finish the tail gas emission control of the current driving mode.
2. The method for controlling exhaust emissions of an automobile according to claim 1, wherein the calibrating the pedal curve and the shift line according to the required power of the optimal original emission area to obtain the torque value of the pedal curve and the transmission ratio of the shift line comprises:
taking a part of pedal curves corresponding to the incomplete ignition of the catalyst in the pedal curves as target pedal curves of the optimal original emission area, and marking torque values from the target pedal curves;
and taking the part of the gear shift lines corresponding to the incomplete ignition of the catalyst as a target gear shift line of the optimal original emission area, and marking the transmission ratio from the target gear shift line.
3. The method for controlling exhaust emissions of an automobile according to claim 2, wherein said determining a target pedal curve of an optimal raw emission area of a part of pedal curves corresponding to a catalyst which is not fully ignited in the pedal curves, and determining a torque value from the target pedal curve, comprises:
calculating to obtain the engine speed according to the required power of the optimal original emission area;
and determining a torque value from the target pedal curve according to the engine speed and the pedal opening.
4. The method according to claim 2, wherein said setting a portion of the shift lines corresponding to the incomplete light-off of the catalyst as a target shift line of the optimal raw emission region, and determining the gear ratio from the target shift line, comprises:
acquiring a vehicle speed corresponding to the required power of the optimal original emission area;
and determining a transmission ratio from the target speed change line according to the vehicle speed and the pedal opening.
5. The method for controlling exhaust emissions of an automobile according to claim 1, wherein before the vehicle is controlled by the torque value and the gear ratio, further comprising:
and under the current driving mode, verifying the torque value and the transmission ratio, and executing the control of the vehicle through the torque value and the transmission ratio after the torque value and the transmission ratio are successfully verified.
6. The vehicle exhaust emission control method according to claim 1, wherein the required power of the optimal raw emission area is calculated by the following formula:
Figure FDA0003410875210000021
wherein P is required,j For the power demand at j seconds, v j A is the vehicle speed at j seconds j Acceleration at j seconds, K r To overcome the factor of inertial resistance of the driveline during acceleration, TM is the mass of the vehicle, f 0 、f 1 、f 2 The load coefficients of the test roads are all the load coefficients of the test roads.
7. The automobile exhaust emission control method according to claim 1, wherein the preset conditions are: the original emission amount of each pollutant is smaller than a preset value, and the optimal original emission area is as follows: the collection of raw emission data is satisfied that each of the pollutants has an raw emission less than a preset value.
8. An automobile exhaust emission control system, characterized by comprising:
the data acquisition and calculation module is used for acquiring a pedal curve, a speed change line and an optimal original emission area of the engine, which correspond to the current driving mode, and calculating the required power of the optimal original emission area; wherein the optimal original emission area is a set of original emission data satisfying a preset condition;
the data calibration module is used for calibrating the pedal curve and the speed change line according to the required power of the optimal original emission area to obtain a torque value of the pedal curve and a transmission ratio of the speed change line;
and the vehicle control module is used for controlling the vehicle through the torque value and the transmission ratio to complete the exhaust emission control of the current driving mode.
9. An electronic device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the automobile exhaust emission control method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program, wherein the computer program, when run, controls a device in which the computer-readable storage medium is located to execute the automobile exhaust emission control method according to any one of claims 1 to 7.
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