CN113482790B - Engine control method and device - Google Patents
Engine control method and device Download PDFInfo
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- CN113482790B CN113482790B CN202110737770.4A CN202110737770A CN113482790B CN 113482790 B CN113482790 B CN 113482790B CN 202110737770 A CN202110737770 A CN 202110737770A CN 113482790 B CN113482790 B CN 113482790B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000001133 acceleration Effects 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 3
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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
- F02D45/00—Electrical control not provided for in groups F02D41/00 - F02D43/00
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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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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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
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to the technical field of vehicle control, in particular to a control method and a device of an engine, wherein the method comprises the following steps: acquiring vehicle state information in the vehicle running process; determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information, and obtaining the difference value of the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox; and obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox, wherein the torque limit correction value is started under the condition that the vehicle has acceleration, the transmission system has certain inertia force when the vehicle has acceleration, the original torque limit is corrected under the action of the inertia force, and when the torque limit correction value is started, the output torque of the engine is limited through the torque limit correction value, so that the safety of the transmission system can be protected, the power of the vehicle can be improved, and the driving power can be increased.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a method and a device for controlling an engine.
Background
In a vehicle transmission system, there is a limit to the output torque of the engine, i.e. a torque limit, at which the power of the vehicle cannot be increased any more, in order to protect the safety of the transmission shaft between the transmission and the retarder.
For example, when the vehicle needs to be powered up to climb a slope, if the vehicle is controlled by the torque limit, the vehicle cannot climb the slope. At the moment, the torque limit can be increased, so that the output torque of the engine is improved.
However, increasing the torque limit to a certain extent can not only ensure the safety of the transmission system, but also improve the power, which is a technical problem to be solved at present.
Disclosure of Invention
In view of the above, the present invention has been made to provide a control method and apparatus of an engine that overcomes or at least partially solves the above problems.
In a first aspect, the present invention provides a control method of an engine, including:
acquiring vehicle state information in the vehicle running process;
determining an actual output torque of an engine and an output shaft torque of a gearbox based on the vehicle state information;
obtaining a difference value between the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox;
and obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox.
Further, the vehicle state information includes:
the main reduction ratio, the transmission efficiency and the gear ratio of the vehicle, the rotating part with the largest rotational inertia in the transmission system are equivalent to the rotational inertia at the wheel of the vehicle, the inertia of the wheel and a flywheel and the acceleration of the vehicle.
Further, after the vehicle state information in the vehicle driving process is acquired, the method further includes:
the vehicle acceleration is subjected to correction processing, and the correction processing comprises the following steps:
filtering the vehicle acceleration;
and multiplying the filtered vehicle acceleration by a correction coefficient, wherein the larger the acceleration is, the larger the correction coefficient is, and obtaining the corrected vehicle acceleration.
Further, the determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information comprises:
determining the actual output torque of the engine according to a first preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the driving process;
and determining the output shaft torque of the gearbox according to a second preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius, and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the driving process.
Further, the obtaining a difference between an actual output torque of the engine and an output shaft torque of the transmission and a maximum torque of the output shaft of the transmission includes:
subtracting the actual output torque of the engine from the output shaft torque of the gearbox to obtain the difference value;
obtaining a maximum torque of an output shaft of the gearbox based on a material torsional strength of the output shaft of the gearbox.
Further, the obtaining a torque limit correction value of the engine based on the difference and the maximum torque of the output shaft of the transmission includes:
and adding the difference value and the maximum torque of the output shaft of the gearbox to obtain a torque limit correction value of the engine.
Further, after obtaining a torque limit correction value of the engine based on the difference and a maximum torque of an output shaft of the transmission, the method further includes:
and obtaining a hysteresis interval of the torque limit correction value of the engine, wherein the hysteresis interval takes the torque limit correction value of the engine as a lower limit and takes a preset multiple of the torque limit correction value of the engine as an upper limit.
In a second aspect, the present invention also provides a control apparatus for an engine, comprising:
the acquisition module is used for acquiring vehicle state information in the vehicle running process;
the determining module is used for determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information;
the device comprises a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is used for obtaining a difference value of an actual output torque of the engine and an output shaft torque of the gearbox and a maximum torque of the output shaft of the gearbox;
and the second obtaining module is used for obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox.
In a third aspect, the present invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the above-mentioned method steps when executing the program.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the above-mentioned method steps.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a control method of an engine, which comprises the following steps: acquiring vehicle state information in the vehicle running process; determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information, and obtaining the difference value of the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox; and obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox, wherein the torque limit correction value is started under the condition that the vehicle has acceleration, because the transmission system has certain inertia force when the vehicle has acceleration, the original torque limit is corrected under the action of the inertia force, and when the torque limit correction value is started, the output torque of the engine is limited through the torque limit correction value, so that the safety of the transmission system can be protected, the power of the vehicle can be improved, and the driving power can be increased.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flowchart illustrating steps of a method of controlling an engine according to an embodiment of the present invention;
FIG. 2 is a schematic configuration diagram showing a control apparatus of an engine in the embodiment of the invention;
fig. 3 is a schematic structural diagram of a computer apparatus that implements a control method of an engine in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
An embodiment of the present invention provides a control method of an engine, as shown in fig. 1, including:
s101, obtaining vehicle state information in the vehicle running process;
s102, determining the actual output torque of an engine and the output shaft torque of a gearbox based on the vehicle state information;
s103, obtaining a difference value between the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox;
and S104, obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox.
First, the vehicle state information during the running of the vehicle acquired in S101 includes: the main reduction ratio, the transmission efficiency, the gear ratio and the rotating part with the largest rotational inertia in the transmission system of the vehicle are equivalent to the sum of the rotational inertia at the wheel of the vehicle, the inertia of the wheel and a flywheel and the acceleration of the vehicle.
From this information, the vehicle state, such as whether the vehicle is in a state of acceleration on a hill or not, and the like can be determined.
After the vehicle state information is acquired, the method further comprises the following steps: the method comprises the following steps of carrying out correction processing on the acceleration of the vehicle, wherein the correction processing comprises the following steps: filtering the acceleration of the vehicle; and multiplying the filtered vehicle acceleration by a correction coefficient, wherein the correction coefficient is smaller when the acceleration is larger, and the corrected vehicle acceleration is obtained.
The method for filtering the vehicle acceleration specifically includes filtering out negative values of the acceleration, only keeping positive values of the acceleration, and performing low-pass filtering processing.
After the vehicle acceleration is filtered, corresponding relation data of the vehicle acceleration and a correction coefficient are obtained, wherein the correction coefficient is smaller when the vehicle acceleration is larger, the correction coefficient is smaller or equal to 1, and the correction coefficient is equal to that a safety margin is added to a torque corresponding to the filtered acceleration, so that the influence caused by slippery road surfaces in rainy days is avoided.
Next, S102 is executed to determine an actual output torque of the engine and an output shaft torque of the transmission based on the vehicle state information.
In an alternative embodiment, the vehicle operating status information includes: final gear ratio i of vehicle 0 Efficiency of transmission eta T Step ratio i g The rotating part with the largest moment of inertia in the transmission system is equivalent to the moment of inertia sum sigma I at the wheel W Wherein, Σ I W ＝I Front wheel +I Rear wheel +I Speed change gear /i 0 2 i g 2 Wherein the moment of inertia at the wheel is the moment of inertia comprising the wheel, except for the flywheel, in the rotating member, I Front wheel 、I Rear wheel 、I Speed change gear Respectively corresponding to the front wheel, the rear wheel and the variable speed gear. Also comprising the inertia I of the flywheel of the wheel r And the acceleration a of the vehicle.
The other parameters are obtained in an implementable manner, and are not limited herein.
When determining the actual output torque of the engine, specifically according to a first preset formula:
where a is the real-time acceleration, T tq Is the actual output torque of the engine, F t To rolling resistance, F i As slope resistance, F w Is the air resistance.
When the output torque of the gearbox is determined, specifically according to a second preset formula:
where a is the real-time acceleration, T 1 Is the output torque of the gearbox, F t To rolling resistance, F i As slope resistance, F w Other parameters are the same as the above parameters for air resistance.
After determining the actual output torque of the engine and the output shaft torque of the gearbox, S103 is executed to obtain the difference between the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox.
Specifically, the difference is obtained by subtracting the actual output torque of the engine from the output torque of the transmission, that is:
Δ＝T tq -T 1
the difference is thus obtained.
The maximum torque of the output shaft of the gearbox is obtained based on the torsional strength of the material of the output shaft of the gearbox.
In particular, based on the material torsion-resistant section modulus W and the maximum torque T of the output shaft of the gearbox 1max In relation to each other, i.e.
Wherein tau is the allowable torsion shear stress of the material, is determined according to the material and is known; and then
d is the diameter of the output shaft of the gearbox.
Based on the above formula, obtainObtaining the maximum torque T of the gearbox 1max 。
When the difference is obtained and the maximum torque T of the gearbox is obtained 1max Then, S104 is executed to obtain a torque limit correction value of the engine based on the difference and the maximum torque of the output shaft of the transmission.
Specifically, the difference is added to the maximum torque of the output shaft of the gearbox to obtain a torque limit correction value of the engine, namely:
T tqmax ＝Δ+T 1max
wherein, T tqmax The torque limit correction value of the engine.
After obtaining the torque limit correction value of the engine, the method may further include:
obtaining a hysteresis zone of a torque limit correction value of the engine, where the hysteresis zone takes the torque limit correction value of the engine as a lower limit and takes a preset multiple of the torque limit correction value of the engine as an upper limit, for example, 1.1T tqmax At the upper limit, a hysteresis interval of [ T ] is obtained tqmax ，1.1T tqmax ]By adopting the hysteresis interval, the back-and-forth access of the torque limiting function is avoided.
After the hysteresis interval is obtained, when the vehicle needs larger power, the torque limit correction value is opened to control the output torque of the engine, and further the torque output of the engine is improved to increase the driving power.
And finally, after obtaining the hysteresis interval of the torque limit correction value of the engine, controlling the engine according to the hysteresis interval so as to improve the driving power.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the invention provides a control method of an engine, which comprises the following steps: acquiring vehicle state information in the vehicle running process; determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information, and obtaining the difference value of the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox; and obtaining a torque limit correction value of the engine based on the difference and the maximum torque of the output shaft of the gearbox, wherein the torque limit correction value is started under the condition that the vehicle has acceleration, the transmission system has certain inertia force when the vehicle has acceleration, the original torque limit is corrected under the action of the inertia force, and when the torque limit correction value is started, the output torque of the engine is limited through the torque limit correction value, so that the safety of the transmission system can be protected, the power of the vehicle can be improved, and the driving power can be increased.
Example two
Based on the same inventive concept, an embodiment of the present invention provides a control apparatus of an engine, as shown in fig. 2, including:
the acquiring module 201 is used for acquiring vehicle state information in the vehicle running process;
a determination module 202 for determining an actual output torque of the engine and an output shaft torque of the gearbox based on the vehicle state information;
a first obtaining module 203, configured to obtain a difference between an actual output torque of the engine and an output shaft torque of the transmission, and a maximum torque of the output shaft of the transmission;
a second obtaining module 204 is configured to obtain a torque limit correction value for the engine based on the difference and a maximum torque of an output shaft of the gearbox.
In an alternative embodiment, the vehicle state information includes: the main reduction ratio, the transmission efficiency and the gear ratio of the vehicle, the rotating part with the largest rotational inertia in the transmission system are equivalent to the rotational inertia at the wheel of the vehicle, the inertia of the wheel and a flywheel and the acceleration of the vehicle.
In an optional embodiment, the method further comprises: the correction module is used for correcting the acceleration of the vehicle;
the correction module comprises:
a filtering unit for filtering the vehicle acceleration;
and the correction unit is used for multiplying the filtered vehicle acceleration by a correction coefficient, wherein the correction coefficient is larger when the acceleration is larger, and the corrected vehicle acceleration is obtained.
In an alternative embodiment, the determining module 202 includes:
the first determining unit is used for determining the actual output torque of the engine according to a first preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius, and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process;
and the second determination unit is used for determining the output shaft torque of the gearbox according to a second preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius, and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process.
In an alternative embodiment, the first obtaining module 203 includes:
the difference making unit is used for making a difference between the actual output torque of the engine and the output shaft torque of the gearbox to obtain the difference value;
an obtaining unit for obtaining a maximum torque of an output shaft of a transmission based on a material torsional strength of the output shaft.
In an alternative embodiment, the second obtaining module 204 is configured to:
and adding the difference value and the maximum torque of the output shaft of the gearbox to obtain a torque limit correction value of the engine.
In an optional embodiment, the method further comprises: a third obtaining unit for
And acquiring a hysteresis interval of the torque limit correction value of the engine, wherein the hysteresis interval takes the torque limit correction value of the engine as a lower limit and takes a preset multiple of the torque limit correction value of the engine as an upper limit.
EXAMPLE III
Based on the same inventive concept, the embodiment of the present invention provides a computer device, as shown in fig. 3, including a memory 304, a processor 302, and a computer program stored on the memory 304 and operable on the processor 302, wherein the processor 302 implements the steps of the control method of the engine when executing the program.
Where in fig. 3 a bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 linking together various circuits including one or more processors, represented by processor 302, and memory, represented by memory 304. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 306 provides an interface between the bus 300 and the receiver 301 and transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 302 is responsible for managing the bus 300 and general processing, and the memory 304 may be used for storing data used by the processor 302 in performing operations.
Example four
Based on the same inventive concept, embodiments of the present invention provide a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the control method of the engine described above.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Moreover, those of skill in the art will appreciate that while some embodiments herein include some features included in other embodiments, not others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the control means, computer apparatus, and engine according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (9)
1. A control method of an engine, characterized by comprising:
acquiring vehicle state information in the vehicle running process;
determining an actual output torque of an engine and an output shaft torque of a gearbox based on the vehicle state information; the determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information comprises:
determining the actual output torque of the engine according to a first preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process;
determining the output shaft torque of the gearbox according to a second preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process;
obtaining a difference value between the actual output torque of the engine and the output shaft torque of the gearbox and the maximum torque of the output shaft of the gearbox;
and obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox.
2. The method of claim 1, wherein the vehicle state information comprises:
the main reduction ratio, the transmission efficiency, the gear ratio and the rotating part with the largest rotational inertia in the transmission system of the vehicle are equivalent to the sum of the rotational inertia at the wheel of the vehicle, the inertia of the wheel and a flywheel and the acceleration of the vehicle.
3. The method of claim 2, further comprising, after said obtaining vehicle state information during vehicle travel:
the correction processing of the vehicle acceleration includes:
filtering the vehicle acceleration;
and multiplying the filtered vehicle acceleration by a correction coefficient, wherein the larger the acceleration is, the larger the correction coefficient is, and obtaining the corrected vehicle acceleration.
4. The method of claim 1, wherein obtaining the difference between the actual output torque of the engine and the output shaft torque of the transmission, and the maximum torque of the output shaft of the transmission, comprises:
subtracting the actual output torque of the engine from the output shaft torque of the gearbox to obtain the difference value;
obtaining a maximum torque of an output shaft of a gearbox based on a material torsional strength of the output shaft of the gearbox.
5. The method of claim 1, wherein obtaining the torque limit correction for the engine based on the difference and a maximum torque of an output shaft of the transmission comprises:
and adding the difference value and the maximum torque of the output shaft of the gearbox to obtain a torque limit correction value of the engine.
6. The method of claim 1, further comprising, after obtaining a torque limit correction for the engine based on the difference and a maximum torque of an output shaft of the transmission:
and acquiring a hysteresis interval of the torque limit correction value of the engine, wherein the hysteresis interval takes the torque limit correction value of the engine as a lower limit and takes a preset multiple of the torque limit correction value of the engine as an upper limit.
7. An engine control device, characterized by comprising:
the acquisition module is used for acquiring vehicle state information in the vehicle running process;
the determining module is used for determining the actual output torque of the engine and the output shaft torque of the gearbox based on the vehicle state information;
the determining module further comprises:
the first determining unit is used for determining the actual output torque of the engine according to a first preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius, and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process;
the second determining unit is used for determining the output shaft torque of the gearbox according to a second preset formula based on the vehicle state information, the whole vehicle mass, the wheel radius, and the rolling resistance, the air resistance and the gradient resistance of the vehicle in the running process;
the first obtaining module is used for obtaining a difference value of an actual output torque of the engine and an output shaft torque of the gearbox and a maximum torque of the output shaft of the gearbox;
and the second obtaining module is used for obtaining a torque limit correction value of the engine based on the difference value and the maximum torque of the output shaft of the gearbox.
8. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps of any of claims 1-6 when executing the program.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
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| CN202110737770.4A CN113482790B (en) | 2021-06-28 | 2021-06-28 | Engine control method and device |
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| CN115288872B (en) * | 2022-08-12 | 2024-01-12 | 潍柴动力股份有限公司 | Torque control method, device and system |
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