CN112460251A - Diesel vehicle, gear identification method thereof and computer-readable storage medium - Google Patents
Diesel vehicle, gear identification method thereof and computer-readable storage medium Download PDFInfo
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- CN112460251A CN112460251A CN202011426388.3A CN202011426388A CN112460251A CN 112460251 A CN112460251 A CN 112460251A CN 202011426388 A CN202011426388 A CN 202011426388A CN 112460251 A CN112460251 A CN 112460251A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H2059/366—Engine or motor speed
Abstract
The invention discloses a gear identification method of a diesel vehicle, which comprises the following steps: acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle; determining a gear shifting coefficient of the diesel vehicle according to the whole vehicle speed, the engine speed and the gear shifting constant; and determining a section where the gear shifting coefficient is located, and determining a current gear of the diesel vehicle according to a gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear. The invention also discloses a diesel vehicle and a computer readable storage medium. The invention improves the gear identification accuracy of the diesel vehicle.
Description
Technical Field
The invention relates to the technical field of diesel vehicles, in particular to a diesel vehicle, a gear identification method thereof and a computer-readable storage medium.
Background
At present, with the continuous expansion of the market of diesel vehicles, the whole vehicle starts to carry out detailed data calibration aiming at the driving feeling of customers on the basis of better dynamic property, and particularly the driving feeling problem caused by gear identification in the gear shifting process. The whole vehicle calibration has high requirements On gear identification, is the basis of drivability calibration, and needs accurate gear judgment in the calibration of the On Board Diagnostics (On Board Diagnostics) of the emission of a diesel vehicle and the PID adjustment of the current gear rotating speed, so that the gear identification needs to be calibrated finely.
In an exemplary technology, a method for identifying a gear position of a diesel vehicle comprises the following steps: the engine obtains the speed of the whole vehicle and the rotating speed of the engine through the ECU, calculates the ratio (V/n) of the current speed of the whole vehicle and the rotating speed of the engine, compares the ratio with the upper limit value Tra _ rVnXH _ C of the speed ratio tolerance band and the lower limit value Tra _ rVnXL _ C of the speed ratio tolerance band of each gear to identify the current gear, and the specific identification gear range is shown in a table 1:
TABLE-1
| Speed ratio tolerance band of V/n ratio and each gear | Gear position |
| Tra_rVnRL_C≤V/n<Tra_rVnRH_C | Reverse gear |
| Tra_rVn1L_C≤V/n<Tra_rVn1H_C | 1 st gear |
| Tra_rVn2L_C≤V/n<Tra_rVn2H_C | 2-gear |
| Tra_rVn3L_C≤V/n<Tra_rVn3H_C | 3 grade |
| Tra_rVn4L_C≤V/n<Tra_rVn4H_C | 4-gear |
| Tra_rVn5L_C≤V/n<Tra_rVn5H_C | 5-gear |
Because the gear is identified only through the speed of the whole vehicle and the rotating speed of the engine, the gear identification is easy to generate misjudgment, the driver drivability feeling can be seriously influenced by the misjudgment of the gear, and the gear identification accuracy of the diesel vehicle is lower.
Disclosure of Invention
The invention mainly aims to provide a diesel vehicle, a gear identification method thereof and a computer readable storage medium, and aims to solve the problem of low gear identification accuracy of the diesel vehicle.
In order to achieve the above object, the present invention provides a gear identification method for a diesel vehicle, comprising the steps of:
acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle;
determining a gear shifting coefficient of the diesel vehicle according to the whole vehicle speed, the engine speed and the gear shifting constant;
and determining a section where the gear shifting coefficient is located, and determining a current gear of the diesel vehicle according to a gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear.
In an embodiment, the step of determining the gear shift coefficient of the diesel vehicle according to the vehicle speed, the engine speed and the gear shift constant includes:
determining a first ratio of the vehicle speed of the whole vehicle to the engine speed;
determining a second ratio of the first ratio to the shift constant;
determining the second ratio as a shift factor of the diesel vehicle.
In an embodiment, before the step of determining the interval where the shift coefficient is located, the method further includes:
obtaining a tolerance coefficient;
determining a first gear shifting coefficient of a first target gear, a second gear shifting coefficient of a second target gear and a third gear shifting coefficient of a third target gear, wherein the second target gear is a previous gear of the first target gear, and the third target gear is a next gear of the first target gear;
determining a lower limit value of a speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the second gear shifting coefficient and the tolerance coefficient, and determining an upper limit value of the speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the third gear shifting coefficient and the tolerance coefficient;
and determining a section corresponding to the first target gear according to the upper limit value of the speed ratio tolerance band and the lower limit value of the speed ratio tolerance band, and storing the section and the first target gear in an associated manner.
In one embodiment, the step of obtaining the tolerance coefficient includes:
acquiring the gear shifting sensitivity;
and determining the tolerance coefficient according to the gear shifting sensitivity, wherein the gear shifting sensitivity and the tolerance coefficient have a positive correlation, and the tolerance coefficient is smaller than a first preset threshold value and larger than a second preset threshold value.
In one embodiment, the step of determining the lower limit value of the speed ratio tolerance band corresponding to the first target gear according to the first shift coefficient, the second shift coefficient and the tolerance coefficient comprises:
determining a first difference between the second shift coefficient and the first shift coefficient;
determining a first product value between the first difference and the tolerance coefficient;
and determining a second difference value of the second gear shifting coefficient and the first product value, and determining the second difference value as a lower limit value of a speed ratio tolerance band corresponding to the first target gear.
In one embodiment, the step of determining the upper limit value of the speed ratio tolerance band corresponding to the first target gear according to the first shift coefficient, the third shift coefficient and the tolerance coefficient comprises:
determining a third difference between the first shift coefficient and the third shift coefficient;
determining a second product value between the third difference and the tolerance coefficient;
and determining the sum of the third gear shifting coefficient and the second product value to determine the upper limit value of the speed ratio tolerance band corresponding to the first target gear.
In one embodiment, after the step of obtaining the entire vehicle speed of the diesel vehicle, the engine speed of the diesel vehicle, and the shift constant, the method further includes:
determining whether the speed of the whole vehicle is zero and/or determining whether the rotating speed of the engine is zero;
when the vehicle speed of the whole vehicle and the engine rotating speed are not zero, executing the step of determining the gear shifting coefficient of the diesel vehicle according to the vehicle speed of the whole vehicle, the engine rotating speed and the gear shifting constant;
and when the speed of the whole vehicle is zero and/or the rotating speed of the engine is zero, determining that the gear of the diesel vehicle is a neutral gear.
In an embodiment, after the step of determining the shift coefficient of the diesel vehicle according to the vehicle speed of the whole vehicle, the engine speed, and the shift constant, the method further includes:
determining whether the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value;
when the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value, the step of determining the range of the gear shifting coefficient is executed;
and when the gear shifting coefficient is larger than the speed ratio calibration limit, determining the gear of the diesel vehicle as a neutral gear.
In order to achieve the above object, the present invention also provides a diesel vehicle including a memory, a processor, and an identification program stored in the memory and executable on the processor, the identification program, when executed by the processor, implementing the steps of the gear identification method of the diesel vehicle as described above.
To achieve the above object, the present invention also provides a computer-readable storage medium including an identification program, which when executed by a processor, implements the steps of the gear identifying method for a diesel vehicle as described above.
According to the diesel vehicle, the gear identification method and the computer readable storage medium thereof, the diesel vehicle obtains the whole vehicle speed and the engine rotating speed of the diesel vehicle, and determines the gear shifting constant based on the transmission efficiency and the tire radius, so that the gear shifting coefficient of the diesel vehicle is determined according to the whole vehicle speed, the engine rotating speed and the gear shifting attempt, and finally the current gear corresponding to the interval where the gear shifting coefficient is located is determined as the current gear of the diesel vehicle. According to the invention, the transmission efficiency of the diesel vehicle and the gear-shifting constant determined by the tire radius are introduced, so that the current gear of the diesel vehicle is determined according to the gear-shifting coefficient, the vehicle speed of the whole vehicle and the engine rotating speed, and the gear identification accuracy of the diesel vehicle is improved.
Drawings
Fig. 1 is a schematic hardware configuration diagram of a diesel vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a gear identification method for a diesel vehicle according to the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a gear identifying method for a diesel vehicle according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The main solution of the embodiment of the invention is as follows: acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle; determining a gear shifting coefficient of the diesel vehicle according to the whole vehicle speed, the engine speed and the gear shifting constant; and determining a section where the gear shifting coefficient is located, and determining a current gear of the diesel vehicle according to a gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear.
According to the invention, the transmission efficiency of the diesel vehicle and the gear-shifting constant determined by the tire radius are introduced, so that the current gear of the diesel vehicle is determined according to the gear-shifting coefficient, the vehicle speed of the whole vehicle and the engine rotating speed, and the gear identification accuracy of the diesel vehicle is improved.
As shown in fig. 1, fig. 1 is a schematic hardware structure diagram of a diesel vehicle according to an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention relates to a diesel vehicle, which may include: a processor 101, e.g. a CPU, a communication bus 102, a memory 103. Wherein the communication bus 102 is used for enabling connection communication between these components. The memory 103 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 103 may alternatively be a storage device separate from the aforementioned processor 101. Those skilled in the art will appreciate that the configuration shown in FIG. 1 is not intended to be limiting of diesel vehicles, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, the memory 103, which is a kind of computer storage medium, may include therein an identification program.
In the apparatus shown in fig. 1, the processor 101 may be configured to call the identification program stored in the memory 103 and perform the following operations:
acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle;
determining a gear shifting coefficient of the diesel vehicle according to the whole vehicle speed, the engine speed and the gear shifting constant;
and determining a section where the gear shifting coefficient is located, and determining a current gear of the diesel vehicle according to a gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
determining a first ratio of the vehicle speed of the whole vehicle to the engine speed;
determining a second ratio of the first ratio to the shift constant;
determining the second ratio as a shift factor of the diesel vehicle.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
obtaining a tolerance coefficient;
determining a first gear shifting coefficient of a first target gear, a second gear shifting coefficient of a second target gear and a third gear shifting coefficient of a third target gear, wherein the second target gear is a previous gear of the first target gear, and the third target gear is a next gear of the first target gear;
determining a lower limit value of a speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the second gear shifting coefficient and the tolerance coefficient, and determining an upper limit value of the speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the third gear shifting coefficient and the tolerance coefficient;
and determining a section corresponding to the first target gear according to the upper limit value of the speed ratio tolerance band and the lower limit value of the speed ratio tolerance band, and storing the section and the first target gear in an associated manner.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
acquiring the gear shifting sensitivity;
and determining the tolerance coefficient according to the gear shifting sensitivity, wherein the gear shifting sensitivity and the tolerance coefficient have a positive correlation, and the tolerance coefficient is smaller than a first preset threshold value and larger than a second preset threshold value.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
determining a first difference between the second shift coefficient and the first shift coefficient;
determining a first product value between the first difference and the tolerance coefficient;
and determining a second difference value of the second gear shifting coefficient and the first product value, and determining the second difference value as a lower limit value of a speed ratio tolerance band corresponding to the first target gear.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
determining a third difference between the first shift coefficient and the third shift coefficient;
determining a second product value between the third difference and the tolerance coefficient;
and determining the sum of the third gear shifting coefficient and the second product value to determine the upper limit value of the speed ratio tolerance band corresponding to the first target gear.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
determining whether the speed of the whole vehicle is zero and/or determining whether the rotating speed of the engine is zero;
when the vehicle speed of the whole vehicle and the engine rotating speed are not zero, executing the step of determining the gear shifting coefficient of the diesel vehicle according to the vehicle speed of the whole vehicle, the engine rotating speed and the gear shifting constant;
and when the speed of the whole vehicle is zero and/or the rotating speed of the engine is zero, determining that the gear of the diesel vehicle is a neutral gear.
In one embodiment, the processor 101 may call the identification program stored in the memory 103, and further perform the following operations:
determining whether the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value;
when the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value, the step of determining the range of the gear shifting coefficient is executed;
and when the gear shifting coefficient is larger than the speed ratio calibration limit, determining the gear of the diesel vehicle as a neutral gear.
According to the scheme, the diesel vehicle obtains the whole vehicle speed and the engine rotating speed of the diesel vehicle, the gear shifting constant is determined based on the transmission efficiency and the tire radius, the gear shifting coefficient of the diesel vehicle is determined according to the whole vehicle speed, the engine rotating speed and the gear shifting attempt, and finally the current gear corresponding to the interval where the gear shifting coefficient is located is determined as the current gear of the diesel vehicle. According to the invention, the transmission efficiency of the diesel vehicle and the gear-shifting constant determined by the tire radius are introduced, so that the current gear of the diesel vehicle is determined according to the gear-shifting coefficient, the vehicle speed of the whole vehicle and the engine rotating speed, and the gear identification accuracy of the diesel vehicle is improved.
Based on the hardware architecture of the diesel vehicle, the embodiment of the gear identification method of the diesel vehicle is provided.
Referring to fig. 2, fig. 2 is a first embodiment of a gear recognition method of a diesel vehicle according to the present invention, which includes the steps of:
step S10, acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle;
in the present embodiment, the execution subject is a diesel vehicle. A diesel vehicle refers to a vehicle in which the engine is a diesel engine. During the running process of the diesel vehicle, the ECU can independently control the engine speed n and the vehicle speed V of the whole vehicle. Reacquiring shift constant C for diesel vehicle1. The shift constant is determined based on at least one of a transmission efficiency and a tire radius of the diesel vehicle, which may be preset and stored in the diesel vehicle. In addition, the diesel vehicle may determine a target parameter according to its model, where the target parameter is at least one of transmission efficiency and tire radius, for example, a truck gearbox transmission ratio of a diesel engine in a certain model of diesel vehicle may determine a shift constant, that is, the target parameter of the model of diesel vehicle is transmission efficiency (the truck gearbox transmission ratio represents transmission efficiency).
Step S20, determining a gear shifting coefficient of the diesel vehicle according to the vehicle speed of the whole vehicle, the engine speed and the gear shifting constant;
after the gear shifting constant is determined, the gear shifting coefficient i of the diesel vehicle is determined by the diesel vehicle according to the vehicle speed of the whole vehicle, the rotating speed of the engine and the gear shifting constant. Specifically, the diesel vehicle firstly determines a first ratio of the vehicle speed of the whole vehicle to the engine speed, and the second ratio can be determined as a gear shifting coefficient when determining a second ratio of the first ratio to the gear shifting constant. That is, the shift coefficient i ═ V/n)/C1。
Step S30, determining a section where the gear shifting coefficient is located, and determining the current gear of the diesel vehicle according to the gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of the speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear.
Each gear in the diesel vehicle corresponds to an interval, the upper limit value of the interval is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the interval is the lower limit value of the speed ratio tolerance band of the gear.
It should be noted that, in the diesel vehicle, the upper limit value of the speed ratio tolerance band and the lower limit value of the speed ratio tolerance band corresponding to the gear are determined according to the first shift coefficient of the gear and the shift coefficients of two adjacent gears.
Specifically, the diesel vehicle obtains a tolerance coefficient C2The tolerance coefficient may be determined according to a shift sensitivity of the diesel vehicle, where the shift sensitivity and the tolerance coefficient are in a positive correlation, but the tolerance coefficient needs to be smaller than a first preset threshold and larger than a second preset threshold. The diesel vehicle determines the gears which need to determine the upper limit value of the tolerance band and the lower limit value of the tolerance band at present as first target gears, determines the previous gear of the first target gears as a second target gear, and determines the next gear of the first target gears as a third target gear. The diesel vehicle determines a first gear shifting coefficient of a first target gear, a gear shifting coefficient of a second target gear and a third gear shifting coefficient of a third target gear, so that a lower limit value of a speed ratio tolerance band corresponding to the first target gear is determined according to the first gear shifting coefficient, the second gear shifting coefficient and the tolerance coefficient, an upper limit value of the speed ratio tolerance band corresponding to the first target gear is determined according to the first gear shifting coefficient, the third gear shifting coefficient and the tolerance coefficient, a section corresponding to the first target gear is determined according to the upper limit value of the speed ratio tolerance band and the lower limit value of the speed ratio tolerance band, and the section and the first target gear are stored in an associated mode.
The step of determining the lower limit value of the speed ratio tolerance band corresponding to the first target gear by the diesel vehicle according to the first gear shifting coefficient, the second gear shifting coefficient and the tolerance coefficient specifically comprises the following steps:
1. determining a first difference between the second shift factor and the first shift factor;
2. determining a first product value between the first difference and the tolerance coefficient;
3. and determining a second difference value of the second gear shifting coefficient and the first product value, and determining the second difference value as a lower limit value of the speed ratio tolerance band corresponding to the first target gear.
It is understood that if the first target gear is the 1 st gear, the lower limit of the speed ratio tolerance lower limit value of the 1 st gear is i0-C2*(i0-i1) Wherein i is0Second gear change factor, i, for a second target gear1And the first gear shifting coefficient corresponds to the first target gear.
The step of determining the upper limit value of the speed ratio tolerance band corresponding to the first target gear by the diesel engine according to the first gear shifting coefficient, the third gear shifting coefficient and the tolerance coefficient specifically comprises the following steps:
1. determining a third difference between the first shift factor and the third shift factor;
2. determining a second product value between the third difference and the tolerance coefficient;
3. and determining the sum of the third gear shifting coefficient and the second product value to determine the upper limit value of the speed ratio tolerance band corresponding to the first target gear.
It is understood that if the first target gear is the 1 st gear, the upper limit value of the speed ratio tolerance band of the 1 st gear is i2+C2*(i1-i2) Wherein i is2Third Shift coefficient, i, for a third target Gear1And the first gear shifting coefficient corresponds to the first target gear.
The diesel vehicle determines the section corresponding to each gear in turn in the calculation mode, and therefore the section and the gears are stored in an associated mode.
After the gear shifting coefficient is determined, the interval where the gear shifting coefficient is located is determined, and therefore the gear corresponding to the interval is determined as the current gear of the diesel vehicle.
The whole vehicle speed V of the diesel vehicle is 50, the engine speed n is 2155rpm, the gear shifting constant is 30.8, the current gear shifting coefficient I is (2155/50)/30.8 is 1.399, the corresponding interval of the I position in the 4 gear is [1.132, 1.42], and the current gear of the diesel vehicle is judged to be 4 gear.
Referring to table-2, table-2 is a table of the relationship between i (n/V/C1) and the shift position identification range in the present embodiment.
TABLE-2
| n/V/C1In the interval | Identified gear |
| i-1-C2*(i-1-i0)≤n/V/C1 | Reverse gear |
| i2+C2*(i1-i2)<n/V/C1≤i0-C2*(i0-i1) | 1 st gear |
| i3+C2*(i2-i3)<n/V/C1≤i1-C2*(i1-i2) | 2-gear |
| i4+C2*(i3-i4)<n/V/C1≤i2-C2*(i2-i3) | 3 grade |
| i5+C2*(i4-i5)<n/V/C1≤i3-C2*(i3-i4) | 4-gear |
| i6+C2*(i5-i6)<n/V/C1≤i4-C2*(i4-i5) | 5-gear |
The gear of the diesel vehicle is identified through the scheme, under the condition that the hardware cost is not increased, the gear identification method is changed by reasonably utilizing the control logic of the current software, the purpose of accurately identifying the gear can be achieved, the perfect gear identification method of the diesel vehicle is achieved, the gear can be identified more accurately through the method, the driving feeling of the whole vehicle is improved, and the risk that the emission exceeds the standard is reduced.
In the technical scheme provided by the embodiment, the diesel vehicle obtains the whole vehicle speed and the engine speed of the diesel vehicle, and determines the gear shifting constant based on the transmission efficiency and the tire radius, so that the gear shifting coefficient of the diesel vehicle is determined according to the whole vehicle speed, the engine speed and the gear shifting attempt, and finally, the current gear corresponding to the interval where the gear shifting coefficient is located is determined as the current gear of the diesel vehicle. According to the invention, the transmission efficiency of the diesel vehicle and the gear-shifting constant determined by the tire radius are introduced, so that the current gear of the diesel vehicle is determined according to the gear-shifting coefficient, the vehicle speed of the whole vehicle and the engine rotating speed, and the gear identification accuracy of the diesel vehicle is improved.
Referring to fig. 3, fig. 3 shows a second embodiment of the gear position identifying method for a diesel vehicle according to the present invention, wherein, after step S10, the method further includes:
step S40, determining whether the speed of the whole vehicle is zero and/or determining whether the rotating speed of the engine is zero;
step S50, when the vehicle speed and the engine speed are not zero, executing the step of determining the gear shifting coefficient of the diesel vehicle according to the vehicle speed, the engine speed and the gear shifting constant;
and step S60, when the vehicle speed of the whole vehicle is zero and/or the engine speed is zero, determining that the gear of the diesel vehicle is a neutral gear.
In the embodiment, when the diesel vehicle is stopped, the engine may not be shut down, and the diesel vehicle still determines the form state at this time, but the gear of the diesel vehicle is neutral, that is, the neutral gear is embodied when the overall speed of the diesel vehicle is zero or the engine speed is zero.
After the vehicle speed, the engine speed and the gear shifting constant of the whole vehicle are obtained, whether the vehicle speed of the whole vehicle is zero or not, whether the engine speed is zero or not, or whether the vehicle speed of the whole vehicle is zero or not and whether the engine speed is zero or not are determined. And when the speed of the whole vehicle and the rotating speed of the engine are not zero, executing a step of determining a gear shifting coefficient of the diesel vehicle according to the speed of the whole vehicle, the rotating speed of the engine and a gear shifting constant, namely determining that the current gear of the diesel vehicle is several gears. And if the vehicle speed of the whole vehicle is zero, the rotating speed of the engine is zero, or the vehicle speed of the whole vehicle is zero and the rotating speed of the engine is zero, determining that the gear of the diesel vehicle is a neutral gear.
In the technical scheme provided by this embodiment, after acquiring the vehicle speed of the whole vehicle, the engine speed and the shift constant of the diesel vehicle, it is determined whether the vehicle speed of the whole vehicle and the engine speed are zero, and if so, the current gear of the diesel vehicle is neutral.
In one embodiment, a speed ratio calibration limit is provided in a diesel vehicle. After the diesel vehicle determines the gear shifting coefficient, whether the gear shifting coefficient is smaller than or equal to a speed ratio calibration limiting value is determined. If the gear shifting coefficient is larger than the speed ratio calibration limit value, the gear of the diesel vehicle is a neutral gear, and if the gear shifting coefficient is smaller than or equal to the speed ratio calibration limit value, the step of determining the range of the gear shifting coefficient is executed, namely the current gear of the diesel vehicle is determined to be several gears.
The invention also provides a diesel vehicle comprising a memory, a processor and an identification program stored in the memory and executable on the processor, the identification program, when executed by the processor, implementing the steps of the gear identification method of the diesel vehicle as described in the above embodiments.
The present invention also provides a computer-readable storage medium including an identification program which, when executed by a processor, implements the steps of the gear identifying method for a diesel vehicle as described in the above embodiments.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
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 solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., 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.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A gear identification method of a diesel vehicle is characterized by comprising the following steps:
acquiring the whole vehicle speed of a diesel vehicle, the engine speed of the diesel vehicle and a gear shifting constant, wherein the gear shifting constant is determined according to at least one of the transmission efficiency and the tire radius of the diesel vehicle;
determining a gear shifting coefficient of the diesel vehicle according to the whole vehicle speed, the engine speed and the gear shifting constant;
and determining a section where the gear shifting coefficient is located, and determining a current gear of the diesel vehicle according to a gear corresponding to the section, wherein the upper limit value of the section is the upper limit value of a speed ratio tolerance band of the gear, and the lower limit value of the section is the lower limit value of the speed ratio tolerance band of the gear.
2. The gear identification method of the diesel vehicle as set forth in claim 1, wherein said step of determining a gear shift coefficient of the diesel vehicle based on the overall vehicle speed, the engine speed and the gear shift constant comprises:
determining a first ratio of the vehicle speed of the whole vehicle to the engine speed;
determining a second ratio of the first ratio to the shift constant;
determining the second ratio as a shift factor of the diesel vehicle.
3. The gear identification method for a diesel vehicle as set forth in claim 1, wherein said step of determining the interval in which the shift coefficient is located further comprises:
obtaining a tolerance coefficient;
determining a first gear shifting coefficient of a first target gear, a second gear shifting coefficient of a second target gear and a third gear shifting coefficient of a third target gear, wherein the second target gear is a previous gear of the first target gear, and the third target gear is a next gear of the first target gear;
determining a lower limit value of a speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the second gear shifting coefficient and the tolerance coefficient, and determining an upper limit value of the speed ratio tolerance band corresponding to the first target gear according to the first gear shifting coefficient, the third gear shifting coefficient and the tolerance coefficient;
and determining a section corresponding to the first target gear according to the upper limit value of the speed ratio tolerance band and the lower limit value of the speed ratio tolerance band, and storing the section and the first target gear in an associated manner.
4. The gear identification method of a diesel vehicle as set forth in claim 3, wherein said step of obtaining a tolerance coefficient comprises:
acquiring the gear shifting sensitivity;
and determining the tolerance coefficient according to the gear shifting sensitivity, wherein the gear shifting sensitivity and the tolerance coefficient have a positive correlation, and the tolerance coefficient is smaller than a first preset threshold value and larger than a second preset threshold value.
5. The gear identification method of a diesel vehicle as set forth in claim 3, wherein said step of determining a lower limit value of a speed ratio tolerance band corresponding to said first target gear based on said first shift coefficient, said second shift coefficient, and said tolerance coefficient comprises:
determining a first difference between the second shift coefficient and the first shift coefficient;
determining a first product value between the first difference and the tolerance coefficient;
and determining a second difference value of the second gear shifting coefficient and the first product value, and determining the second difference value as a lower limit value of a speed ratio tolerance band corresponding to the first target gear.
6. The gear identification method for a diesel vehicle as set forth in claim 3, wherein said step of determining an upper limit value of a speed ratio tolerance band corresponding to said first target gear based on said first shift coefficient, said third shift coefficient, and said tolerance coefficient comprises:
determining a third difference between the first shift coefficient and the third shift coefficient;
determining a second product value between the third difference and the tolerance coefficient;
and determining the sum of the third gear shifting coefficient and the second product value to determine the upper limit value of the speed ratio tolerance band corresponding to the first target gear.
7. The gear identification method of the diesel vehicle as set forth in any one of claims 1-6, wherein after the step of obtaining the entire vehicle speed of the diesel vehicle, the engine speed of the diesel vehicle and the shift constant, further comprising:
determining whether the speed of the whole vehicle is zero and/or determining whether the rotating speed of the engine is zero;
when the vehicle speed of the whole vehicle and the engine rotating speed are not zero, executing the step of determining the gear shifting coefficient of the diesel vehicle according to the vehicle speed of the whole vehicle, the engine rotating speed and the gear shifting constant;
and when the speed of the whole vehicle is zero and/or the rotating speed of the engine is zero, determining that the gear of the diesel vehicle is a neutral gear.
8. The gear identification method of the diesel vehicle as set forth in any one of claims 1-6, wherein after the step of determining the gear shift coefficient of the diesel vehicle according to the overall vehicle speed, the engine speed and the gear shift constant, further comprising:
determining whether the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value;
when the gear shifting coefficient is smaller than or equal to a speed ratio calibration limit value, the step of determining the range of the gear shifting coefficient is executed;
and when the gear shifting coefficient is larger than the speed ratio calibration limit, determining the gear of the diesel vehicle as a neutral gear.
9. A diesel vehicle, characterized in that it comprises a memory, a processor and an identification program stored in said memory and executable on said processor, said identification program, when executed by said processor, implementing the steps of the gear identification method of a diesel vehicle according to any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that it comprises an identification program which, when executed by a processor, carries out the steps of the gear identification method of a diesel vehicle according to any one of claims 1 to 8.
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