CN111980814A - Engine control method and device - Google Patents
Engine control method and device Download PDFInfo
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- CN111980814A CN111980814A CN201910439696.0A CN201910439696A CN111980814A CN 111980814 A CN111980814 A CN 111980814A CN 201910439696 A CN201910439696 A CN 201910439696A CN 111980814 A CN111980814 A CN 111980814A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000001133 acceleration Effects 0.000 claims abstract description 165
- 238000012937 correction Methods 0.000 claims abstract description 50
- 238000013507 mapping Methods 0.000 claims description 34
- 238000004590 computer program Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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Classifications
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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
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
Abstract
The invention discloses an engine control method and device, wherein the method comprises the steps of obtaining target generated power required by vehicle running, and determining the basic rotating speed of an engine according to the target generated power; detecting a driving parameter of the vehicle, and determining a correction rotating speed based on the driving parameter of the vehicle, wherein the driving parameter comprises the speed of the vehicle and/or the acceleration of the vehicle; obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed; and controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed. According to the engine control method and the engine control device, the engine rotating according to the target rotating speed can give consideration to the NVH experience of the user on the basis of ensuring the economy.
Description
Technical Field
The invention relates to the field of vehicles, in particular to an engine control method and device.
Background
The range-extended electric vehicle is an electric vehicle with a range extender, wherein the range extender is a system consisting of an engine and a generator, and the system can convert the heat of fuel oil into electric energy.
In the prior art, in order to reduce the use cost of the vehicle, the vehicle operation usually only considers the economy of converting fuel into electric energy, namely, after the power generation required by the range extender is determined, the engine is driven to work at the rotating speed with the lowest fuel consumption.
However, only considering the economy of fuel consumption will sacrifice the Noise, Vibration and Harshness (NVH) performance of the vehicle, resulting in poor driving experience for the user.
Disclosure of Invention
The embodiment of the invention provides an engine control method and device, and aims to solve the problem that the NVH experience of a user is poor due to the fact that an engine of a vehicle only pursues economy at present.
In a first aspect, an embodiment of the present invention provides an engine control method, including:
acquiring target generated power required by vehicle running, and determining the basic rotating speed of an engine according to the target generated power;
detecting a driving parameter of the vehicle, and determining a correction rotating speed based on the driving parameter of the vehicle, wherein the driving parameter comprises the speed of the vehicle and/or the acceleration of the vehicle;
obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed;
And controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle includes: in a case where the running parameter includes an acceleration of the vehicle, an opening degree of an accelerator pedal of the vehicle is detected, and the corrected rotation speed is determined based on the opening degree of the accelerator pedal.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle includes: and under the condition that the running parameters comprise the acceleration of the vehicle, detecting the acceleration of the vehicle, and determining a corrected rotating speed according to the acceleration of the vehicle and a preset first mapping relation, wherein the first mapping relation comprises the relation between the acceleration and the corrected rotating speed.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle includes: under the condition that the running parameters comprise the vehicle speed of the vehicle and the acceleration of the vehicle, detecting the acceleration and the vehicle speed of the vehicle, and determining a corrected rotating speed according to the acceleration, the vehicle speed and a preset second mapping relation of the vehicle, wherein the second mapping relation comprises the relation among the acceleration, the vehicle speed and the corrected rotating speed.
Optionally, the step of obtaining the target rotation speed based on the base rotation speed and the corrected rotation speed includes: and taking the sum of the basic rotating speed and the correction rotating speed as a target rotating speed under the condition that the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the speed of the vehicle is greater than or equal to a preset speed.
Optionally, the step of obtaining the target rotation speed based on the base rotation speed and the corrected rotation speed includes: and under the condition that the acceleration of the vehicle is smaller than a preset acceleration and the speed of the vehicle is smaller than the preset speed, taking the difference value of the basic rotating speed minus the corrected rotating speed as a target rotating speed.
In a second aspect, an embodiment of the present invention further provides an engine control apparatus, including:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring target generated power required by vehicle running and determining the basic rotating speed of an engine according to the target generated power;
the determining module is used for detecting a running parameter of the vehicle and determining a correction rotating speed based on the running parameter of the vehicle, wherein the running parameter comprises the speed of the vehicle and/or the acceleration of the vehicle;
The calculation module is used for obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed;
and the control module controls the engine to rotate at a target torque corresponding to the target rotating speed and the target generated power so as to enable the actual rotating speed of the engine to reach the target rotating speed.
Optionally, the determining module is further configured to detect an opening degree of an accelerator pedal of the vehicle when the driving parameter includes an acceleration of the vehicle, and determine the corrected rotation speed based on the opening degree of the accelerator pedal.
Optionally, the determining module is further configured to detect an acceleration of the vehicle when the driving parameter includes the acceleration of the vehicle, and determine a corrected rotation speed according to the acceleration of the vehicle and a preset first mapping relationship, where the first mapping relationship includes a relationship between the acceleration and the corrected rotation speed.
Optionally, the determining module is further configured to detect an acceleration and a vehicle speed of the vehicle when the driving parameter includes the vehicle speed of the vehicle and the acceleration of the vehicle, and determine the corrected rotation speed according to the acceleration, the vehicle speed of the vehicle and a preset second mapping relationship, where the second mapping relationship includes a relationship between the acceleration, the vehicle speed, and the corrected rotation speed.
Optionally, the calculation module is configured to use a sum of the base rotation speed and the correction rotation speed as the target rotation speed when the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the vehicle speed of the vehicle is greater than or equal to a preset vehicle speed.
Optionally, the calculation module is configured to, when the acceleration of the vehicle is smaller than a preset acceleration and the vehicle speed of the vehicle is smaller than the preset vehicle speed, take a difference obtained by subtracting the corrected rotation speed from the basic rotation speed as a target rotation speed.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the engine control method when executing the computer program.
In a fourth aspect, the embodiment of the present invention further provides a vehicle, where the vehicle is an extended range electric vehicle, and the vehicle includes the electronic device as described above.
In a fifth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the engine control method as described above.
In the embodiment of the invention, after the basic rotating speed of the generator with the best economy is determined through the target generating power, the basic rotating speed is adjusted through the correction rotating speed determined based on the driving parameters to obtain the target rotating speed, and the target rotating speed can enable a user to obtain better NVH experience relative to the basic rotating speed, so that the engine rotating according to the target rotating speed can also give consideration to the NVH experience of the user on the basis of ensuring the economy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flow chart of an engine control method provided in accordance with an embodiment of the present invention;
FIG. 2 is a flow chart of an engine control method provided in accordance with another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an engine control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating an engine control method according to an embodiment of the present invention. The embodiment of the invention provides an engine control method, which comprises the following steps:
step 101: acquiring target generated power required by vehicle running, and determining the basic rotating speed of an engine according to the target generated power;
the target generated power required for the vehicle running depends on the power required for the vehicle speed, the power required for acceleration, and the power required for each device turned on in the vehicle during the running of the vehicle. The target generated power required by the vehicle is larger as the vehicle speed is higher, and similarly, the target generated power required by the vehicle is larger as the acceleration of the vehicle is larger. The sum of the power required by all aspects in the running process of the vehicle is the target generated power required by the running of the vehicle.
The target generated power may be obtained from an Electronic Control Unit (ECU) of the vehicle, or may be obtained by other methods, which is not limited in the embodiment of the present invention.
In the embodiment of the invention, after the target generating power is obtained, the basic rotating speed of the engine is determined by means of the optimal fuel economy curve of the engine. The optimal fuel economy curve of the engine is a curve obtained after multiple tests, and the curve corresponds to the engine rotating speed with the lowest fuel consumption under different power generation powers. The engine operates at the basic rotating speed which is obtained by means of the optimal fuel economy curve of the engine and corresponds to the target generating power, and the cost of a user can be saved on the premise that the target generating power is met.
Step 102: the method comprises the steps of detecting a driving parameter of the vehicle, and determining a corrected rotating speed based on the driving parameter of the vehicle, wherein the driving parameter comprises the speed of the vehicle and/or the acceleration of the vehicle.
The vehicle speed of the vehicle may be obtained by detecting the rotation speed of the wheel, may also be obtained by the ECU, and may also be obtained in other manners, which is not limited in the embodiment of the present invention.
The acceleration of the vehicle may be obtained by the rotation speed of the wheel in two units of time, may also be obtained by the ECU, and may also be obtained in other manners, which is not limited in the embodiment of the present invention.
The driving parameters of the vehicle may also include other parameters such as the amount of oil remaining in the vehicle, the weight of the vehicle, etc.
The correction rotating speed is obtained by testing the vehicle for multiple times, when the running parameters comprise the acceleration of the vehicle, the running parameters are tested by using a plurality of candidate correction rotating speeds under the condition of one acceleration, so that the candidate correction rotating speed with the comprehensive optimal engine power output speed and NVH performance under the acceleration is selected as the correction rotating speed corresponding to the acceleration, and the correction rotating speeds corresponding to the multiple accelerations are obtained.
Similarly, when the running parameters comprise the vehicle speed of the vehicle, the running parameters are tested by using a plurality of candidate corrected rotating speeds under the condition of one vehicle speed, so that the candidate corrected rotating speed with the optimal comprehensive engine power output speed and NVH performance at the vehicle speed is selected as the corrected rotating speed corresponding to the vehicle speed, and further the corrected rotating speeds corresponding to the vehicle speeds are obtained.
And after the corresponding running parameters are detected, determining the corrected rotating speed with the comprehensive optimal engine power output speed and NVH performance under the running parameters based on the result of the pre-test.
In order to ensure that the economy of the basic speed is not affected, the correction speed should be less than 20% of the basic speed.
Step 103: and obtaining a target rotating speed based on the basic rotating speed and the corrected rotating speed.
The basic rotating speed has the advantage of saving user cost, the correction rotating speed has the advantage of improving user NVH experience, and the target rotating speed obtained based on the basic rotating speed and the correction rotating speed can have the advantages of saving user cost and improving user NVH experience.
The target rotation speed may be a sum or a difference between the base rotation speed and the corrected rotation speed, or a sum or a difference obtained by multiplying the base rotation speed and the corrected rotation speed by corresponding scaling factors, or may be calculated in other manners, which is not limited in the embodiment of the present invention.
Step 104: and controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed.
After the target rotation speed and the target generated power are determined, the corresponding target torque can be obtained, and the specific mode can be as follows: the target torque is 9550 × target generated power/target rotation speed, and the target torque is calculated.
The actual rotating speed of the engine is adjusted to the target rotating speed through the target torque, so that the engine can have the advantages of saving cost of a user and improving NVH (noise vibration harshness) experience of the user in the vehicle running process.
In the embodiment of the invention, after the basic rotating speed of the generator with the best economy is determined through the target generating power, the basic rotating speed is adjusted through the correction rotating speed determined based on the driving parameters to obtain the target rotating speed, and the target rotating speed can enable a user to obtain better NVH experience relative to the basic rotating speed, so that the engine rotating according to the target rotating speed can also give consideration to the NVH experience of the user on the basis of ensuring the economy.
Referring to fig. 2, a flowchart of an engine control method according to another embodiment of the invention is shown. The main difference between this embodiment and the embodiment shown in fig. 1 is that the driving parameters include the acceleration of the vehicle. As shown in fig. 2, the method comprises the following steps:
step 201: the method comprises the steps of obtaining target generated power required by vehicle running, and determining the basic rotating speed of an engine according to the target generated power.
The implementation process and beneficial effects of step 201 may refer to the description in step 101, and are not described herein again.
Step 202: an opening degree of an accelerator pedal of the vehicle is detected, and the corrected rotation speed is determined based on the opening degree of the accelerator pedal.
In the present embodiment, the degree of opening of the accelerator pedal is detected as a method of detecting the acceleration of the vehicle. A larger opening degree of the accelerator pedal indicates a larger acceleration of the vehicle, and a smaller opening degree of the accelerator pedal indicates a smaller acceleration of the vehicle.
The opening degree of the accelerator pedal and the acceleration can be in a linear relation, namely the acceleration corresponding to 2 times of the opening degree is 2 times of the acceleration corresponding to 1 time of the opening degree; the opening of the accelerator pedal may also be exponentially related to the acceleration, for example: the acceleration corresponding to 2 times the opening is the square of the acceleration corresponding to 1 time the opening.
After the corresponding acceleration is determined by detecting the opening degree of the accelerator pedal, the magnitude of the corrected rotating speed corresponding to the acceleration can be determined.
In an alternative embodiment, in the case that the driving parameter includes an acceleration of the vehicle, the step 202 may include:
the method comprises the steps of detecting the acceleration of the vehicle, and determining a correction rotating speed according to the acceleration of the vehicle and a preset first mapping relation, wherein the first mapping relation comprises the relation between the acceleration and the correction rotating speed.
When the running parameters comprise the acceleration of the vehicle, testing each acceleration by using a plurality of to-be-selected correction rotating speeds respectively, so as to select the to-be-selected correction rotating speed with the optimal comprehensive engine power output speed and NVH performance under the acceleration as the correction rotating speed corresponding to the acceleration, and further obtain the correction rotating speeds corresponding to the plurality of accelerations, namely obtaining the preset first mapping relation.
In the embodiment, the correction rotating speed with the comprehensively optimal engine power output speed and NVH performance of the vehicle at each acceleration is determined through the first mapping relation obtained through pre-testing, the optimal correction rotating speed can be obtained according to the characteristics of the actual vehicle, the problem that the correction rotating speed is separated from the actual speed due to the fact that a plurality of different vehicle types or a plurality of engines uniformly determine the correction rotating speed in the same mode is solved, and the determined correction rotating speed is more practical.
It should be noted that, when the driving parameter includes the acceleration of the vehicle, the acceleration of the vehicle is detected, and the corrected rotation speed is determined according to the acceleration of the vehicle and a preset first mapping relationship, where the first mapping relationship includes a relationship between the acceleration and the corrected rotation speed, and the method is also applicable to step 102, and has the same beneficial effects, and details are not repeated here.
Further, in the case where the running parameter includes both the vehicle speed of the vehicle and the acceleration of the vehicle; the step 202 may include:
and detecting the acceleration and the speed of the vehicle, and determining a corrected rotating speed according to the acceleration and the speed of the vehicle and a preset second mapping relation, wherein the second mapping relation comprises the relation among the acceleration, the speed and the corrected rotating speed.
When the running parameters comprise the acceleration and the vehicle speed of the vehicle, a plurality of to-be-selected correction rotating speeds are tested under various conditions of different acceleration and different vehicle speeds, so that the to-be-selected correction rotating speed with the engine power output speed and the NVH performance comprehensively optimal under various acceleration and vehicle speed conditions is selected as the correction rotating speed corresponding to the acceleration and the vehicle speed, and then the corresponding correction rotating speeds under various conditions of different acceleration and different vehicle speeds are obtained, and the preset second mapping relation is obtained.
In the embodiment, the corrected rotating speed with the comprehensively optimal engine power output speed and NVH performance of the vehicle under various conditions of various accelerated speeds and vehicle speeds is determined through the second mapping relation obtained through pre-testing, the optimal corrected rotating speed can be obtained according to the characteristics of the actual vehicle, the problem that the corrected rotating speed is separated from the actual rotating speed due to the fact that a method for determining the corrected rotating speed by uniformly adopting the same mode for various different vehicle types or various engines is solved, and the determined corrected rotating speed is more practical.
It should be noted that, under the condition that the driving parameters include the vehicle speed of the vehicle and the acceleration of the vehicle, the acceleration and the vehicle speed of the vehicle are detected, and the corrected rotation speed is determined according to the acceleration, the vehicle speed of the vehicle and a preset second mapping relationship, where the second mapping relationship includes a relationship among the acceleration, the vehicle speed and the corrected rotation speed, and is also applicable to step 102, and has the same beneficial effects, which are not described herein again.
Step 203: and obtaining a target rotating speed based on the basic rotating speed and the corrected rotating speed.
The implementation process and beneficial effects of step 203 may refer to the description in step 103, and are not described herein again.
In an optional embodiment, when the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the speed of the vehicle is greater than or equal to a preset speed; step 203 may comprise:
and taking the sum of the basic rotating speed and the corrected rotating speed as a target rotating speed.
When the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the vehicle speed of the vehicle is greater than or equal to the preset vehicle speed, it can be considered that the NVH performance demand of the user is low, and the power performance demand of the vehicle is high.
In the embodiment, when the requirement degree of the user on the NVH performance is low and the requirement degree of the user on the power performance of the vehicle is high, the target rotating speed is obtained by increasing the correction rotating speed on the basic rotating speed, and the power performance of the engine can be enhanced, so that the requirement of the user on the power performance is better met.
It should be noted that, when the acceleration of the vehicle is greater than or equal to the preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the vehicle speed of the vehicle is greater than or equal to the preset vehicle speed, taking the sum of the basic rotation speed and the corrected rotation speed as the target rotation speed may also be applicable to step 103, and has the same beneficial effects, which are not described herein again.
In another alternative embodiment, when the acceleration of the vehicle is less than a preset acceleration and the vehicle speed of the vehicle is less than the preset vehicle speed; step 203 may comprise:
and taking the difference value obtained by subtracting the corrected rotating speed from the basic rotating speed as a target rotating speed.
When the acceleration of the vehicle is smaller than the preset acceleration and the vehicle speed of the vehicle is smaller than the preset vehicle speed, the requirement degree of the user on the NVH performance can be considered to be high, and the requirement degree of the user on the power performance of the vehicle is low.
In the embodiment, when the requirement degree of the user on the NVH performance is high, the target rotating speed is obtained by subtracting the correction rotating speed from the basic rotating speed, and the engine can reduce vibration and noise, so that the requirement of the user on the NVH performance is better met.
It should be noted that, when the acceleration of the vehicle is smaller than the preset acceleration and the vehicle speed of the vehicle is smaller than the preset vehicle speed, taking the difference value obtained by subtracting the corrected rotation speed from the basic rotation speed as the target rotation speed may also be applicable to step 103, and has the same beneficial effects, and details are not repeated here.
Step 204: and controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed.
The implementation process and beneficial effects of step 204 can be referred to the description in step 104, and are not described herein again.
In the embodiment, the acceleration of the vehicle is obtained by detecting the opening degree of the accelerator pedal, and the determined correction rotating speed is made to meet the actual requirement of the user based on the acceleration, so that the final engine operation result meets the actual requirement of the user.
Referring to fig. 3, fig. 3 is a structural diagram of an engine control apparatus according to an embodiment of the present invention, and as shown in fig. 3, an engine control apparatus 300 includes an obtaining module 301, a determining module 302, a calculating module 303, and a control module 304;
the acquisition module 301 acquires target generated power required by vehicle running, and determines the basic rotating speed of an engine according to the target generated power;
The determining module 302 is used for detecting a running parameter of the vehicle and determining a corrected rotating speed based on the running parameter of the vehicle, wherein the running parameter comprises the vehicle speed of the vehicle and/or the acceleration of the vehicle;
a calculation module 303, configured to obtain a target rotation speed based on the basic rotation speed and the corrected rotation speed;
the control module 304 controls the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that an actual rotation speed of the engine reaches the target rotation speed.
Optionally, the determining module 302 is further configured to detect an opening degree of an accelerator pedal of the vehicle when the driving parameter includes an acceleration of the vehicle, and determine the corrected rotation speed based on the opening degree of the accelerator pedal.
Optionally, the determining module 302 is further configured to detect an acceleration of the vehicle when the driving parameter includes the acceleration of the vehicle, and determine a corrected rotation speed according to the acceleration of the vehicle and a preset first mapping relationship, where the first mapping relationship includes a relationship between the acceleration and the corrected rotation speed.
Optionally, the determining module 302 is further configured to detect an acceleration and a vehicle speed of the vehicle when the driving parameter includes the vehicle speed of the vehicle and the acceleration of the vehicle, and determine a corrected rotation speed according to the acceleration, the vehicle speed of the vehicle and a preset second mapping relationship, where the second mapping relationship includes a relationship between the acceleration, the vehicle speed, and the corrected rotation speed.
Optionally, the calculating module 303 is configured to use a sum of the base rotation speed and the correction rotation speed as the target rotation speed when the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the vehicle speed of the vehicle is greater than or equal to a preset vehicle speed.
Optionally, the calculating module 303 is configured to take a difference obtained by subtracting the corrected rotation speed from the basic rotation speed as a target rotation speed when the acceleration of the vehicle is smaller than a preset acceleration and the vehicle speed of the vehicle is smaller than the preset vehicle speed.
The engine control device 300 can implement the processes implemented by the engine control method in the method embodiments of fig. 1 and 2, and the detailed description is omitted here to avoid repetition.
After determining the base rotation speed of the generator with the best economy through the target generated power, the engine control device 300 in the embodiment of the invention adjusts the base rotation speed through the correction rotation speed determined based on the driving parameters to obtain the target rotation speed, and the target rotation speed can enable a user to obtain better NVH experience relative to the base rotation speed, so that the engine rotating according to the target rotation speed can simultaneously give consideration to the NVH experience of the user on the basis of ensuring the economy.
The embodiment of the invention also provides an engine control device, which comprises a memory and a processor, wherein:
the processor is used for acquiring target generated power required by vehicle running and determining the basic rotating speed of the engine according to the target generated power; detecting a driving parameter of the vehicle, and determining a correction rotating speed based on the driving parameter of the vehicle, wherein the driving parameter comprises the speed of the vehicle and/or the acceleration of the vehicle; obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed; and controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle by the processor includes: in a case where the running parameter includes an acceleration of the vehicle, an opening degree of an accelerator pedal of the vehicle is detected, and the corrected rotation speed is determined based on the opening degree of the accelerator pedal.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle by the processor includes: and under the condition that the running parameters comprise the acceleration of the vehicle, detecting the acceleration of the vehicle, and determining a corrected rotating speed according to the acceleration of the vehicle and a preset first mapping relation, wherein the first mapping relation comprises the relation between the acceleration and the corrected rotating speed.
Optionally, the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle by the processor includes: under the condition that the running parameters comprise the vehicle speed of the vehicle and the acceleration of the vehicle, detecting the acceleration and the vehicle speed of the vehicle, and determining a corrected rotating speed according to the acceleration, the vehicle speed and a preset second mapping relation of the vehicle, wherein the second mapping relation comprises the relation among the acceleration, the vehicle speed and the corrected rotating speed.
Optionally, the processor executes the step of obtaining the target rotation speed based on the base rotation speed and the correction rotation speed, and the step includes: and taking the sum of the basic rotating speed and the correction rotating speed as a target rotating speed under the condition that the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the speed of the vehicle is greater than or equal to a preset speed.
Optionally, the processor executes the step of obtaining the target rotation speed based on the base rotation speed and the correction rotation speed, and the step includes: and under the condition that the acceleration of the vehicle is smaller than a preset acceleration and the speed of the vehicle is smaller than the preset speed, taking the difference value of the basic rotating speed minus the corrected rotating speed as a target rotating speed.
An embodiment of the present invention further provides an engine control apparatus, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above-mentioned engine control method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned engine control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. An engine control method characterized by comprising:
acquiring target generated power required by vehicle running, and determining the basic rotating speed of an engine according to the target generated power;
detecting a driving parameter of the vehicle, and determining a correction rotating speed based on the driving parameter of the vehicle, wherein the driving parameter comprises the speed of the vehicle and/or the acceleration of the vehicle;
obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed;
and controlling the engine to rotate at a target torque corresponding to the target rotation speed and the target generated power so that the actual rotation speed of the engine reaches the target rotation speed.
2. The method of claim 1, wherein the step of detecting a driving parameter of the vehicle and determining a modified rotational speed based on the driving parameter of the vehicle comprises: in a case where the running parameter includes an acceleration of the vehicle, an opening degree of an accelerator pedal of the vehicle is detected, and the corrected rotation speed is determined based on the opening degree of the accelerator pedal.
3. The method according to claim 1 or 2, wherein the step of detecting a driving parameter of the vehicle and determining a corrected rotation speed based on the driving parameter of the vehicle comprises: and under the condition that the running parameters comprise the acceleration of the vehicle, detecting the acceleration of the vehicle, and determining a corrected rotating speed according to the acceleration of the vehicle and a preset first mapping relation, wherein the first mapping relation comprises the relation between the acceleration and the corrected rotating speed.
4. The method of claim 3, wherein the step of detecting a driving parameter of the vehicle and determining a modified rotational speed based on the driving parameter of the vehicle comprises: under the condition that the running parameters comprise the vehicle speed of the vehicle and the acceleration of the vehicle, detecting the acceleration and the vehicle speed of the vehicle, and determining a corrected rotating speed according to the acceleration, the vehicle speed and a preset second mapping relation of the vehicle, wherein the second mapping relation comprises the relation among the acceleration, the vehicle speed and the corrected rotating speed.
5. The method of claim 1, wherein the step of deriving a target speed based on the base speed and the corrected speed comprises: and taking the sum of the basic rotating speed and the correction rotating speed as a target rotating speed under the condition that the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the speed of the vehicle is greater than or equal to a preset speed.
6. The method of claim 1, wherein the step of deriving a target speed based on the base speed and the corrected speed comprises: and under the condition that the acceleration of the vehicle is smaller than a preset acceleration and the speed of the vehicle is smaller than the preset speed, taking the difference value of the basic rotating speed minus the corrected rotating speed as a target rotating speed.
7. An engine control apparatus characterized by comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring target generated power required by vehicle running and determining the basic rotating speed of an engine according to the target generated power;
the determining module is used for detecting a running parameter of the vehicle and determining a correction rotating speed based on the running parameter of the vehicle, wherein the running parameter comprises the speed of the vehicle and/or the acceleration of the vehicle;
the calculation module is used for obtaining a target rotating speed based on the basic rotating speed and the correction rotating speed;
and the control module controls the engine to rotate at a target torque corresponding to the target rotating speed and the target generated power so as to enable the actual rotating speed of the engine to reach the target rotating speed.
8. The engine control apparatus of claim 7, wherein the determination module is further configured to detect an opening degree of an accelerator pedal of the vehicle and determine the corrected rotation speed based on the opening degree of the accelerator pedal in a case where the running parameter includes an acceleration of the vehicle.
9. The engine control apparatus according to claim 7 or 8, wherein the determination module is further configured to detect an acceleration of the vehicle in a case where the running parameter includes the acceleration of the vehicle, and determine a corrected rotation speed based on the acceleration of the vehicle and a preset first map, wherein the first map includes a relationship between the acceleration and the corrected rotation speed.
10. The engine control apparatus according to claim 9, wherein the determining module is further configured to detect an acceleration and a vehicle speed of the vehicle in a case where the running parameter includes the vehicle speed of the vehicle and the acceleration of the vehicle, and determine the corrected rotation speed according to the acceleration, the vehicle speed, and a preset second mapping relationship, wherein the second mapping relationship includes a relationship between the acceleration, the vehicle speed, and the corrected rotation speed.
11. The engine control apparatus according to claim 7, wherein the calculation module is configured to take a sum of the base rotation speed and the correction rotation speed as a target rotation speed in a case where the acceleration of the vehicle is greater than or equal to a preset acceleration, or the acceleration of the vehicle is less than the preset acceleration and the vehicle speed of the vehicle is greater than or equal to a preset vehicle speed.
12. The engine control apparatus according to claim 7, wherein the calculation module is configured to take a difference value of the base rotation speed minus the correction rotation speed as a target rotation speed in a case where the acceleration of the vehicle is smaller than a preset acceleration and the vehicle speed of the vehicle is smaller than the preset vehicle speed.
13. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the engine control method according to any one of claims 1 to 6 when executing the computer program.
14. A vehicle, the vehicle being an extended range electric vehicle, characterized in that the vehicle comprises the electronic device of claim 13.
15. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the engine control method according to any one of claims 1 to 6.
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| CN201910439696.0A CN111980814A (en) | 2019-05-24 | 2019-05-24 | Engine control method and device |
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| CN201910439696.0A CN111980814A (en) | 2019-05-24 | 2019-05-24 | Engine control method and device |
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Cited By (1)
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| CN112096527A (en) * | 2019-06-18 | 2020-12-18 | 比亚迪股份有限公司 | Engine control method, engine control device, vehicle and storage medium |
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