CN117056534A - Method, device, equipment and readable storage medium for generating accelerator pedal map - Google Patents
Method, device, equipment and readable storage medium for generating accelerator pedal map Download PDFInfo
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Abstract
The invention provides an accelerator pedal map generation method, an accelerator pedal map generation device, accelerator pedal map generation equipment and a readable storage medium. The method comprises the following steps: dividing an initial acceleration response graph with empty acceleration into areas corresponding to preset working conditions; according to the design scheme corresponding to each preset working condition, the acceleration of each position in each area is obtained and written in, and a complete acceleration response diagram is obtained; converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram; and obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings. The invention improves the generation efficiency of the accelerator pedal map and is convenient for realizing the unified dynamic performance style of automobile manufacturers.
Description
Technical Field
The present invention relates to the field of automotive technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for generating an accelerator pedal map.
Background
Vehicle accelerator pedal characteristics are used to reflect the driving characteristics of the vehicle, and are typically embodied in the form of an accelerator pedal map that specifies the relationship between accelerator pedal opening, engine speed, and engine output torque.
Most automobile manufacturers currently generate accelerator pedal maps in the following ways: and (5) carrying out real vehicle accelerator pedal characteristic matching on a sample vehicle according to subjective evaluation experience and a reference vehicle. The method has the defects of strong individual dependence on participators, high requirement on test environment, low repeatability and the like. And because objective quantitative indexes of the system are not available and subjective preferences of each person are not possible to be completely consistent, the accelerator pedal characteristic matching work is often and repeatedly carried out in the project development process, so that manpower and material resources are wasted and the development period is prolonged.
Disclosure of Invention
The invention mainly aims to provide an accelerator pedal map generation method, device and equipment and a readable storage medium, and aims to solve the technical problem of low efficiency of a method for generating an accelerator pedal map.
In a first aspect, the present invention provides an accelerator pedal map generation method, the accelerator pedal map generation method including:
dividing an initial acceleration response graph with empty acceleration into areas corresponding to preset working conditions;
according to the design scheme corresponding to each preset working condition, the acceleration of each position in each area is obtained and written in, and a complete acceleration response diagram is obtained;
converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram;
and obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings.
In a second aspect, the present invention also provides an accelerator pedal map generating apparatus, comprising:
the dividing module is used for dividing the initial acceleration response graph with the empty acceleration into areas corresponding to preset working conditions;
the perfecting module is used for obtaining and writing the acceleration of each position in each area according to the design scheme corresponding to each preset working condition to obtain a complete acceleration response diagram;
the wheel side driving moment calculation module is used for converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram;
the accelerator pedal map generation module is used for obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings.
In a third aspect, the present invention also provides an accelerator pedal map generating apparatus comprising a processor, a memory, and an accelerator pedal map generating program stored on the memory and executable by the processor, wherein the accelerator pedal map generating program, when executed by the processor, implements the steps of the accelerator pedal map generating method as described above.
In a fourth aspect, the present invention also provides a readable storage medium having stored thereon an accelerator pedal map generation program, wherein the accelerator pedal map generation program, when executed by a processor, implements the steps of the accelerator pedal map generation method as described above.
In the invention, an initial acceleration response graph with empty acceleration is divided into areas corresponding to preset working conditions; according to the design scheme corresponding to each preset working condition, the acceleration of each position in each area is obtained and written in, and a complete acceleration response diagram is obtained; converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram; and obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings. According to the method and the device, the initial acceleration response graph with the empty acceleration is subjected to regional division and regional acceleration writing according to the preset working condition to obtain the complete acceleration response graph, and then the complete acceleration response graph is subjected to relevant conversion by combining the gear shifting graph until the accelerator pedal graph of each gear is obtained, so that the repeated adjustment of the accelerator pedal characteristic in the project development process is avoided, the accelerator pedal graph generation efficiency is improved, and the unified power performance style of an automobile manufacturer is conveniently realized.
Drawings
FIG. 1 is a flow chart of an embodiment of an accelerator pedal map generation method according to the present invention;
FIG. 2 is a schematic diagram illustrating the division of an initial acceleration response map according to an embodiment of the accelerator pedal map generation method of the present invention;
FIG. 3 is a schematic illustration of the correspondence between vehicle speed and acceleration for different accelerator pedal travel increments;
FIG. 4 is a schematic illustration of the correspondence between different accelerator pedal travel reduction vehicle speeds and accelerations;
FIG. 5 is a schematic illustration of a shift map in an embodiment of an accelerator pedal map generation method according to the present invention;
FIG. 6 is a schematic diagram of functional modules of an embodiment of an accelerator pedal map generating apparatus according to the present invention;
fig. 7 is a schematic hardware configuration diagram of an accelerator pedal map generating apparatus according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In a first aspect, an embodiment of the present invention provides an accelerator pedal map generation method.
In an embodiment, referring to fig. 1, fig. 1 is a flowchart illustrating an embodiment of an accelerator pedal map generating method according to the present invention. As shown in fig. 1, the accelerator pedal map generation method includes:
step S10, dividing an initial acceleration response graph with empty acceleration into areas corresponding to preset working conditions;
in this embodiment, the acceleration response map is used to characterize the relationship among the accelerator pedal opening, the vehicle speed, and the acceleration. The initial acceleration response map refers to an acceleration response map in which the acceleration portion is blank.
The preset working conditions are set according to actual needs, and after the preset working conditions are set, the initial acceleration response diagram is divided according to the characteristics of the preset working conditions, namely the initial acceleration response diagram is divided into areas corresponding to the preset working conditions.
Further, in an embodiment, the preset working conditions include a sliding working condition, a starting working condition, a constant speed reacceleration working condition, and step S10 includes:
taking a first area corresponding to zero accelerator pedal opening in an initial acceleration response chart with empty acceleration as an area corresponding to a sliding working condition; taking a second area of the initial acceleration response graph with the empty acceleration, which is not more than the vehicle speed corresponding to each maximum acceleration corresponding to each accelerator pedal opening, as an area corresponding to a starting working condition; taking a third area corresponding to zero acceleration in the initial acceleration response diagram with the empty acceleration as an area corresponding to a uniform-speed working condition; and taking a fourth area with acceleration greater than zero in the remaining areas as an area corresponding to a constant speed re-acceleration working condition, and taking a fifth area with acceleration less than zero as an area corresponding to a constant speed re-deceleration working condition, wherein the remaining areas are areas except the first area, the second area and the third area in the initial acceleration response diagram with the empty acceleration.
In this embodiment, referring to fig. 2, fig. 2 is a schematic diagram illustrating the division of an initial acceleration response map according to an embodiment of the accelerator pedal map generation method of the present invention. As shown in fig. 2:
since the accelerator pedal opening corresponding to the coasting condition is zero, the region corresponding to the accelerator pedal opening (i.e., the "opening" in fig. 2) that is zero is taken as the region corresponding to the coasting condition, such as the region labeled "1" in fig. 2.
According to the vehicle drive characteristics, the torque response characteristics of the power source are considered to normally reach the start peak acceleration before a certain vehicle speed, and therefore a region that is not greater than the vehicle speed corresponding to each maximum acceleration corresponding to each accelerator pedal opening (for example, the maximum vehicle speed corresponding to 2% to 15% of the accelerator pedal opening is 5, the maximum vehicle speed corresponding to 20% to 25% of the accelerator pedal opening is 10, and the maximum vehicle speed corresponding to 30% to 100% of the accelerator pedal opening is 15) is regarded as a region corresponding to the start condition, such as a region labeled "2" in fig. 2.
The driving force provided by the power source under the uniform speed working condition is equal to the running resistance of the vehicle, and the corresponding area is taken as the area corresponding to the uniform speed working condition, such as the area marked with the reference number '3' in fig. 2.
Uniform re-acceleration region: when the driving force provided by the power source is greater than the running resistance of the vehicle, the acceleration is greater than 0, the vehicle is accelerated, the corresponding region is used as the region corresponding to the uniform re-acceleration working condition, and the different re-acceleration capacities corresponding to different accelerator pedal stroke increments can be represented by 4-1, 4-2, 4-3 and the like according to the different accelerator pedal opening degrees converted by the re-acceleration stroke increments in the region.
Uniform speed re-deceleration zone: when the driving force provided by the power source is smaller than the running resistance of the vehicle, the acceleration is smaller than 0, the vehicle runs at a reduced speed, the corresponding area is used as the area corresponding to the uniform speed re-reduction working condition, and the different accelerator pedal opening degrees converted according to the stroke reduction amounts in the area can be used for representing the deceleration performance corresponding to the different accelerator pedal stroke reduction amounts by 5-1, 5-2, 5-3 and the like.
Based on the embodiment, the acceleration response graph is divided into 5 areas according to typical working conditions in 5 of daily driving of a customer, and accelerator pedal Map torque corresponding to acceleration requirements of different driving working conditions is intuitively reflected. And (3) formulating quantitative part-load power performance targets comprising sliding power performance, starting power performance, constant speed re-acceleration power performance, constant speed re-deceleration power performance and the like at early stages of projects, and designing an accelerator pedal Map according to the power performance targets. The sliding dynamic property, the starting dynamic property, the constant re-acceleration and the constant re-deceleration dynamic property targets are respectively represented by sliding acceleration, starting peak acceleration, starting acceleration linearity, minimum accelerator pedal travel corresponding to constant-speed running, re-acceleration gain and re-acceleration linearity, re-deceleration gain and re-deceleration linearity and the like. The work can be completed before the design sample car is loaded, the design sample car is taken off line only by simple real car verification adjustment, the repeated adjustment of the characteristics of the accelerator pedal in the project development process is avoided, the project development period is shortened, and the unified dynamic performance style of an automobile manufacturer is conveniently realized.
Step S20, according to design schemes corresponding to preset working conditions, obtaining acceleration of each position in each area and writing in to obtain a complete acceleration response diagram;
in this embodiment, a design scheme corresponding to each preset working condition is preset, and for each region, the acceleration of each position in the region is obtained and written according to the corresponding design scheme of the preset working condition, so as to obtain a complete acceleration response diagram.
Further, in an embodiment, step S20 includes:
substituting the vehicle speed corresponding to each position in the first area into a first formula aiming at the sliding working condition to obtain and write the acceleration of each position in the first area, wherein the first formula is as follows:
wherein a is the acceleration, T, of each position in the first region 1 Is the engine friction torque, i n The speed ratio is a gear ratio corresponding to each position in the first area, eta is transmission system efficiency, r is tire rolling radius, A, B, C is a constant term coefficient, a primary term coefficient and a secondary term coefficient corresponding to a sliding resistance curve, v is a vehicle speed corresponding to each position in the first area, delta is a rotating mass conversion coefficient, and m is test mass;
aiming at starting working conditions, according to the corresponding accelerator pedal opening degrees of all positions in the second area and the equivalent relation between the accelerator pedal opening degrees and the accelerations, the accelerations of all positions in the second area are obtained and written;
writing zeros into each position in the third region for constant speed conditions;
aiming at a uniform re-acceleration working condition, according to a first relation, a second relation and vehicle speeds and accelerator pedal opening degrees corresponding to all positions in a fourth area, obtaining and writing the acceleration of all positions in the fourth area, wherein the first relation is a conversion formula of the accelerator pedal opening degrees and the accelerator pedal stroke increment, and the second relation is used for representing the acceleration corresponding to different accelerator pedal stroke increment when different vehicle speeds;
aiming at the uniform speed re-deceleration working condition, according to a third relation, a fourth relation and the corresponding speeds and accelerator pedal openings of all positions in a fifth area, obtaining and writing the accelerations of all positions in the fifth area, wherein the third relation is a conversion formula of the accelerator pedal opening and the accelerator pedal stroke decrement, and the fourth relation is used for representing the accelerations corresponding to different accelerator pedal stroke decrements at different speeds;
thus, a complete acceleration response diagram is obtained.
In this embodiment, for the sliding condition, the vehicle speed corresponding to each position in the first area is substituted into the first formula, so that the acceleration of each position in the first area can be obtained and written. It should be noted that, the gear ratios corresponding to the positions in the first region need to be determined in combination with a shift map, where the shift map is used to represent gears corresponding to different vehicle speeds and different accelerator pedal openings, that is, the gear corresponding to the positions in the first region may be determined according to the shift map, so as to determine the corresponding gear ratio.
For starting working conditions, the following preparation work is performed in advance: acquiring an accelerator pedal stroke-maximum acceleration curve; and converting the accelerator pedal travel into the accelerator pedal opening according to the relation between the accelerator pedal travel and the accelerator pedal opening by combining the total accelerator pedal travel, so as to determine the function relation between the accelerator pedal opening and the acceleration, and constructing a second formula with the independent variable of the accelerator pedal opening as the acceleration. And then, obtaining a second formula with the independent variable of the accelerator pedal opening degree as the acceleration, substituting the accelerator pedal opening degree corresponding to each position in the second area into the second formula, obtaining the acceleration of each position in the second area, and writing in.
Aiming at the uniform-speed working condition, the method is characterized in that the acceleration is zero, and then the zero is written into each position in the third area. And the stroke of the accelerator pedal corresponding to each vehicle speed under the uniform speed working condition is recorded as s.
For the uniform speed re-acceleration working condition, the following preparation work is performed in advance:
according to market positioning of vehicle types, a multi-stroke acceleration gain-vehicle speed curve which takes c as a tolerance and corresponds to different driving modes, namely a multi-stroke ACCGain curve is obtained, for example, an ACCGain curve which corresponds to one driving mode and corresponds to c, 2c, 3c, 4c and 5c respectively is obtained, and quantitative design of ACCGain can be visually embodied in numerical value. Different driving modes can be designed with different multi-stroke acceleration gains, the power requirements on the ECO mode are not strong, the multi-stroke ACCGain tends to overlap, the Sport mode has stronger power performance, under the condition that absolute capacity is relatively common, a scheme that the pedal stroke increment is increased and the acceleration gain is gradually reduced can be adopted, and the Normal mode can be selected to be closer to the Sport mode or the ECO mode according to the absolute power. The accelerations of the vehicle model at different vehicle speeds and at the accelerator pedal stroke increment of c, 2c and 3c are respectively calculated according to the following formulas (namely a second relation):
a s+c ＝ACCGain c ·c
a s+2c ＝ACCGain 2c ·2c
a s+3c ＝ACCGain 3c ·3c
a s+c 、a s+2c 、a s+3c the acceleration (m/s) corresponding to the accelerator pedal stroke (s+c) mm, (s+2c) mm, (s+3c) mm corresponding to the accelerator pedal stroke (s+c) mm is further depressed by (s+c) mm, 2cm, 3cm in the accelerator pedal stroke smm for maintaining the constant speed running 2 )；ACCGain c 、ACCGain 2c 、ACCGain 3c ACCGain (m/s) corresponding to the travel of the accelerator pedal with constant speed re-pressing cmm, 2cmm and 3cmm 2 /mm); c. 2c, 3c are accelerator pedal travel increments (mm).
As shown in fig. 3, the acceleration curves are corresponding to the respective vehicle speeds at the c, 2c, 3c, 4c, 5c stroke increments, and the accelerations are also corresponding to the respective vehicle speeds at the accelerator pedal strokes s+c, s+2c, s+3c, s+4c, s+5c.
The accelerator pedal stroke is converted into the accelerator pedal opening according to the relation between the accelerator pedal stroke and the accelerator pedal opening by combining the total accelerator pedal stroke, so that a conversion formula (namely, a first relation) of the accelerator pedal opening and the accelerator pedal stroke increment can be determined, and the acceleration of each position in the fourth area is obtained and written according to the first relation, the second relation and the vehicle speed and the accelerator pedal opening corresponding to each position in the fourth area, and the acceleration corresponding to different accelerator pedal stroke increment corresponds to 4-1, 4-2, 4-3 and the like in fig. 2.
For the uniform speed re-deceleration working condition, the following preparation work is performed in advance:
according to market positioning of vehicle types, a multi-stroke deceleration gain-vehicle speed curve which corresponds to different driving modes and takes d as a tolerance, namely a multi-stroke DECGain curve, for example, a DECGain curve which corresponds to one driving mode and corresponds to d, 2d, 3d, 4d and 5d respectively, can intuitively embody quantitative design of the DECGain in terms of numerical value. Different driving modes can design different multi-stroke acceleration reductions. The accelerations of the vehicle model at different vehicle speeds with the reduction of d, 2d and 3d of the travel of the accelerator pedal are respectively calculated according to the following formula (namely, a fourth relation),
a s-d ＝DECGain d ·d
a s-2d ＝DECGain 2d ·2d
a s-3d ＝DECGain 3d ·3d
wherein a is s-d 、a s-2d 、a s-3d Further releasing the corresponding deceleration (m/s) of (s-d) mm, (s-2 d) mm, (s-3 d) mm accelerator pedal stroke (s-d) corresponding to dmm, 2dmm, 3dmm in the accelerator pedal stroke smm for maintaining constant speed running 2 )；DECGain d 、DECGain 2d 、DECGain 3d Is to re-loosen the deceleration gain (m/s) corresponding to the accelerator pedal stroke of (s-d) mm, (s-2 d) mm and (s-3 d) mm corresponding to dmm, 2dmm and 3dmm at a uniform speed 2 /mm); d. 2d, 3d are accelerator pedalsTravel decrement (mm).
As shown in fig. 4, the acceleration curves are corresponding to the respective vehicle speeds d, 2d, 3d, 4d, and 5d, and the acceleration curves are also corresponding to the respective vehicle speeds s-d, s-2d, s-3d, s-4d, and s-5d, respectively, in the accelerator pedal strokes.
Combining the total travel of the accelerator pedal, converting the travel of the accelerator pedal into the opening of the accelerator pedal according to the relationship between the travel of the accelerator pedal and the opening of the accelerator pedal, so as to determine a conversion formula (namely, a third relationship) of the opening of the accelerator pedal and the decrement of the travel of the accelerator pedal, thereby obtaining and writing the acceleration of each position in the fifth region according to the third relationship, the fourth relationship and the corresponding vehicle speed and the opening of the accelerator pedal in each position in the fifth region, and correspondingly obtaining the accelerations of different acceleration corresponding to the decrement of the travel of the accelerator pedal respectively to 5-1, 5-2, 5-3 and the like in fig. 2.
Step S30, converting the acceleration in the complete acceleration response diagram into a wheel-side driving moment to obtain a wheel-side driving moment response diagram;
in this embodiment, according to a conversion formula of the acceleration and the wheel-side driving torque, the acceleration in the complete acceleration response chart is converted into the wheel-side driving torque, and the wheel-side driving torque response chart is obtained. The wheel side driving moment response diagram is used for representing the corresponding relation among the vehicle speed, the accelerator pedal opening and the wheel side driving moment.
Further, in an embodiment, the step of converting the acceleration in the complete acceleration response map to the wheel-side driving torque includes:
substituting the acceleration in the complete acceleration response diagram into a second formula for converting the acceleration in the complete acceleration response diagram into a wheel side driving torque, wherein the second formula is as follows:
wherein T is 2 For the wheel side driving moment, delta is a conversion coefficient of rotating mass, m is test mass, a is acceleration in a complete acceleration response diagram, F v For uniform running resistance, η is driveline efficiency and r is tire rolling radius.
And S40, obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and a gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings.
In this embodiment, referring to fig. 5, fig. 5 is a schematic diagram of a shift map in an embodiment of an accelerator pedal map generating method according to the present invention. As shown in fig. 5, the shift map is used to represent the gear positions corresponding to different vehicle speeds (vertical axis) and different accelerator pedal opening degrees (horizontal and vertical directions) (1 to 6 in fig. 5 represent different gear positions, respectively).
By combining the wheel side driving moment response diagram and the gear shifting map, the corresponding relation among the vehicle speed, the accelerator pedal opening, the wheel side driving moment and the gears can be determined, so that the engine speed, the accelerator pedal opening and the engine output torque corresponding to each gear are determined according to the related calculation, and the accelerator pedal map of each gear is obtained.
Further, in an embodiment, step S40 includes:
determining corresponding relations among the vehicle speed, the accelerator opening, the gear and the wheel driving moment according to the wheel driving moment response diagram and the gear shifting map;
converting wheel side driving torque corresponding to each gear into engine output torque according to a third formula, converting vehicle speed corresponding to each gear into engine rotation speed according to a fourth formula, and obtaining an accelerator pedal map of each gear, wherein the third formula is as follows:
wherein T is 3 For engine output torque, T 2 Driving moment i for wheel edge corresponding to each gear n Is the gear ratio corresponding to each gear, and eta is the efficiency of the transmission system;
the fourth formula is:
wherein n is the engine speed corresponding to each gear of each vehicle speed in the wheel torque response diagram, i n The speed ratio corresponding to each gear is v, the speed of each vehicle in the wheel torque response diagram is D, the preset value is (generally 0.377), and r is the rolling radius of the tire.
In this embodiment, it is easy to understand that the engine output torque corresponding to different engine speeds and different accelerator pedal openings in each gear can be obtained through the conversion of the third formula and the fourth formula, so as to obtain the accelerator pedal map. For example, the horizontal axis of an accelerator pedal map is accelerator pedal opening, the vertical axis is engine speed, and the intermediate value is engine output torque.
In this embodiment, an initial acceleration response chart with an empty acceleration is divided into areas corresponding to preset working conditions; according to the design scheme corresponding to each preset working condition, the acceleration of each position in each area is obtained and written in, and a complete acceleration response diagram is obtained; converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram; and obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings. According to the method, the device and the system, the initial acceleration response graph with the empty acceleration is subjected to regional division and regional acceleration writing according to the preset working condition to obtain the complete acceleration response graph, and then the complete acceleration response graph is subjected to relevant conversion by combining the gear shifting graph until the accelerator pedal graph of each gear is obtained, so that the repeated adjustment of the accelerator pedal characteristic in the project development process is avoided, the accelerator pedal graph generation efficiency is improved, and the unified power performance style of an automobile manufacturer is conveniently realized.
In a second aspect, an embodiment of the present invention further provides an accelerator pedal map generating apparatus.
In an embodiment, referring to fig. 6, fig. 6 is a schematic functional block diagram of an accelerator pedal map generating apparatus according to an embodiment of the invention. As shown in fig. 6, the accelerator pedal map generation apparatus includes:
the dividing module 10 is configured to divide the initial acceleration response map with the empty acceleration into areas corresponding to preset working conditions;
the perfecting module 20 is used for obtaining and writing the acceleration of each position in each area according to the design scheme corresponding to each preset working condition to obtain a complete acceleration response diagram;
the wheel-side driving moment calculation module 30 is configured to convert the acceleration in the complete acceleration response map into a wheel-side driving moment, and obtain a wheel-side driving moment response map;
the accelerator pedal map generating module 40 is configured to obtain an accelerator pedal map of each gear according to the wheel driving torque response map and a shift map, where the shift map is used to represent gears corresponding to different vehicle speeds and different accelerator pedal openings.
Further, in an embodiment, the preset working conditions include a sliding working condition, a starting working condition, a uniform speed working condition, a reacceleration working condition and a deceleration working condition, and the dividing module 10 is configured to:
taking a first area corresponding to zero accelerator pedal opening in an initial acceleration response chart with empty acceleration as an area corresponding to a sliding working condition;
taking a second area of the initial acceleration response graph with the empty acceleration, which is not more than the vehicle speed corresponding to each maximum acceleration corresponding to each accelerator pedal opening, as an area corresponding to a starting working condition;
taking a third area corresponding to zero acceleration in the initial acceleration response diagram with the empty acceleration as an area corresponding to a uniform-speed working condition;
and taking a fourth area with acceleration greater than zero in the remaining areas as an area corresponding to a constant speed re-acceleration working condition, and taking a fifth area with acceleration less than zero as an area corresponding to a constant speed re-deceleration working condition, wherein the remaining areas are areas except the first area, the second area and the third area in the initial acceleration response diagram with the empty acceleration.
Further, in one embodiment, the perfecting module 20 is configured to:
substituting the vehicle speed corresponding to each position in the first area into a first formula aiming at the sliding working condition to obtain and write the acceleration of each position in the first area, wherein the first formula is as follows:
wherein a is the acceleration, T, of each position in the first region 1 Is the engine friction torque, i n The speed ratio is a gear ratio corresponding to each position in the first area, eta is transmission system efficiency, r is tire rolling radius, A, B, C is a constant term coefficient, a primary term coefficient and a secondary term coefficient corresponding to a sliding resistance curve, v is a vehicle speed corresponding to each position in the first area, delta is a rotating mass conversion coefficient, and m is test mass;
aiming at starting working conditions, according to the corresponding accelerator pedal opening degrees of all positions in the second area and the equivalent relation between the accelerator pedal opening degrees and the accelerations, the accelerations of all positions in the second area are obtained and written;
writing zeros into each position in the third region for constant speed conditions;
aiming at a uniform re-acceleration working condition, according to a first relation, a second relation and vehicle speeds and accelerator pedal opening degrees corresponding to all positions in a fourth area, obtaining and writing the acceleration of all positions in the fourth area, wherein the first relation is a conversion formula of the accelerator pedal opening degrees and the accelerator pedal stroke increment, and the second relation is used for representing the acceleration corresponding to different accelerator pedal stroke increment when different vehicle speeds;
aiming at the uniform speed re-deceleration working condition, according to a third relation, a fourth relation and the corresponding speeds and accelerator pedal openings of all positions in a fifth area, obtaining and writing the accelerations of all positions in the fifth area, wherein the third relation is a conversion formula of the accelerator pedal opening and the accelerator pedal stroke decrement, and the fourth relation is used for representing the accelerations corresponding to different accelerator pedal stroke decrements at different speeds;
thus, a complete acceleration response diagram is obtained.
Further, in an embodiment, the wheel side driving torque calculation module 30 is configured to:
substituting the acceleration in the complete acceleration response diagram into a second formula for converting the acceleration in the complete acceleration response diagram into a wheel side driving torque, wherein the second formula is as follows:
wherein T is 2 For the wheel side driving moment, delta is a conversion coefficient of rotating mass, m is test mass, a is acceleration in a complete acceleration response diagram, F v For uniform running resistance, η is driveline efficiency and r is tire rolling radius.
Further, in one embodiment, the accelerator pedal map generation module 40 is configured to:
determining corresponding relations among the vehicle speed, the accelerator opening, the gear and the wheel driving moment according to the wheel driving moment response diagram and the gear shifting map;
converting wheel side driving torque corresponding to each gear into engine output torque according to a third formula, converting vehicle speed corresponding to each gear into engine rotation speed according to a fourth formula, and obtaining an accelerator pedal map of each gear, wherein the third formula is as follows:
wherein T is 3 For engine output torque, T 2 Driving moment i for wheel edge corresponding to each gear n Is the gear ratio corresponding to each gear, and eta is the efficiency of the transmission system;
the fourth formula is:
wherein n is the engine speed corresponding to each gear of each vehicle speed in the wheel torque response diagram, i n The speed ratio corresponding to each gear is v, the speed of each vehicle in the wheel rim torque response diagram is D, the preset value is D, and r is the tire rolling radius.
The function implementation of each module in the accelerator pedal map generating device corresponds to each step in the accelerator pedal map generating method embodiment, and the function and implementation process thereof are not described in detail herein.
In a third aspect, an embodiment of the present invention provides an accelerator pedal map generating apparatus, which may be an apparatus having a data processing function such as a personal computer (personal computer, PC), a notebook computer, a server, or the like.
Referring to fig. 7, fig. 7 is a schematic hardware configuration diagram of an accelerator pedal map generating apparatus according to an embodiment of the present invention. In an embodiment of the present invention, the accelerator pedal map generating apparatus may include a processor 1001 (e.g., a central processor Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein the communication bus 1002 is used to enable connected communications between these components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM) or a stable memory (non-volatile memory), such as a disk memory, and the memory 1005 may alternatively be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration shown in fig. 7 is not limiting of the invention and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
With continued reference to fig. 7, an operating system, a network communication module, a user interface module, and an accelerator pedal map generation program may be included in memory 1005, which is one type of computer storage medium in fig. 7. The processor 1001 may call an accelerator pedal map generation program stored in the memory 1005, and execute the accelerator pedal map generation method provided by the embodiment of the present invention.
In a fourth aspect, embodiments of the present invention also provide a readable storage medium.
The present invention has stored on a readable storage medium an accelerator pedal map generation program which, when executed by a processor, implements the steps of the accelerator pedal map generation method described above.
The method implemented when the accelerator pedal map generating program is executed may refer to various embodiments of the accelerator pedal map generating method of the present invention, and will not be described herein.
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 system 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 system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. An accelerator pedal map generation method, characterized by comprising:
dividing an initial acceleration response graph with empty acceleration into areas corresponding to preset working conditions;
according to the design scheme corresponding to each preset working condition, the acceleration of each position in each area is obtained and written in, and a complete acceleration response diagram is obtained;
converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram;
and obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings.
2. The accelerator pedal map generating method according to claim 1, wherein the preset conditions include a coasting condition, a start condition, a constant speed reacceleration condition, and the step of dividing the initial acceleration response map with the empty acceleration into respective areas corresponding to the respective preset conditions includes:
taking a first area corresponding to zero accelerator pedal opening in an initial acceleration response chart with empty acceleration as an area corresponding to a sliding working condition;
taking a second area of the initial acceleration response graph with the empty acceleration, which is not more than the vehicle speed corresponding to each maximum acceleration corresponding to each accelerator pedal opening, as an area corresponding to a starting working condition;
taking a third area corresponding to zero acceleration in the initial acceleration response diagram with the empty acceleration as an area corresponding to a uniform-speed working condition;
and taking a fourth area with acceleration greater than zero in the remaining areas as an area corresponding to a constant speed re-acceleration working condition, and taking a fifth area with acceleration less than zero as an area corresponding to a constant speed re-deceleration working condition, wherein the remaining areas are areas except the first area, the second area and the third area in the initial acceleration response diagram with the empty acceleration.
3. The method for generating an accelerator pedal map according to claim 2, wherein the step of obtaining and writing the acceleration of each position in each region according to the design scheme corresponding to each preset condition, and obtaining the complete acceleration response map comprises:
substituting the vehicle speed corresponding to each position in the first area into a first formula aiming at the sliding working condition to obtain and write the acceleration of each position in the first area, wherein the first formula is as follows:
wherein a is the acceleration, T, of each position in the first region 1 Is the engine friction torque, i n The speed ratio is a gear ratio corresponding to each position in the first area, eta is transmission system efficiency, r is tire rolling radius, A, B, C is a constant term coefficient, a primary term coefficient and a secondary term coefficient corresponding to a sliding resistance curve, v is a vehicle speed corresponding to each position in the first area, delta is a rotating mass conversion coefficient, and m is test mass;
aiming at starting working conditions, according to the corresponding accelerator pedal opening degrees of all positions in the second area and the equivalent relation between the accelerator pedal opening degrees and the accelerations, the accelerations of all positions in the second area are obtained and written;
writing zeros into each position in the third region for constant speed conditions;
aiming at a uniform re-acceleration working condition, according to a first relation, a second relation and vehicle speeds and accelerator pedal opening degrees corresponding to all positions in a fourth area, obtaining and writing the acceleration of all positions in the fourth area, wherein the first relation is a conversion formula of the accelerator pedal opening degrees and the accelerator pedal stroke increment, and the second relation is used for representing the acceleration corresponding to different accelerator pedal stroke increment when different vehicle speeds;
aiming at the uniform speed re-deceleration working condition, according to a third relation, a fourth relation and the corresponding speeds and accelerator pedal openings of all positions in a fifth area, obtaining and writing the accelerations of all positions in the fifth area, wherein the third relation is a conversion formula of the accelerator pedal opening and the accelerator pedal stroke decrement, and the fourth relation is used for representing the accelerations corresponding to different accelerator pedal stroke decrements at different speeds;
thus, a complete acceleration response diagram is obtained.
4. The accelerator pedal map generation method according to claim 1, characterized in that the step of converting the acceleration in the complete acceleration response map into the wheel-side drive torque includes:
substituting the acceleration in the complete acceleration response diagram into a second formula for converting the acceleration in the complete acceleration response diagram into a wheel side driving torque, wherein the second formula is as follows:
wherein T is 2 For the wheel side driving moment, delta is a conversion coefficient of rotating mass, m is test mass, a is acceleration in a complete acceleration response diagram, F v For uniform running resistance, η is driveline efficiency and r is tire rolling radius.
5. The accelerator pedal map generation method according to claim 4, wherein the step of obtaining the accelerator pedal map for each gear from the wheel-side drive torque response map and the shift map includes:
determining corresponding relations among the vehicle speed, the accelerator opening, the gear and the wheel driving moment according to the wheel driving moment response diagram and the gear shifting map;
converting wheel side driving torque corresponding to each gear into engine output torque according to a third formula, converting vehicle speed corresponding to each gear into engine rotation speed according to a fourth formula, and obtaining an accelerator pedal map of each gear, wherein the third formula is as follows:
wherein T is 3 For engine output torque, T 2 Driving moment i for wheel edge corresponding to each gear n Is the gear ratio corresponding to each gear, and eta is the efficiency of the transmission system;
the fourth formula is:
wherein n is the engine speed corresponding to each gear of each vehicle speed in the wheel torque response diagram, i n The speed ratio corresponding to each gear is v, the speed of each vehicle in the wheel rim torque response diagram is D, the preset value is D, and r is the tire rolling radius.
6. An accelerator pedal map generation apparatus, characterized by comprising:
the dividing module is used for dividing the initial acceleration response graph with the empty acceleration into areas corresponding to preset working conditions;
the perfecting module is used for obtaining and writing the acceleration of each position in each area according to the design scheme corresponding to each preset working condition to obtain a complete acceleration response diagram;
the wheel side driving moment calculation module is used for converting the acceleration in the complete acceleration response diagram into a wheel side driving moment to obtain a wheel side driving moment response diagram;
the accelerator pedal map generation module is used for obtaining an accelerator pedal map of each gear according to the wheel side driving moment response map and the gear shifting map, wherein the gear shifting map is used for representing gears corresponding to different vehicle speeds and different accelerator pedal openings.
7. The accelerator pedal map generating apparatus according to claim 6, wherein the preset conditions include a coasting condition, a start condition, a constant speed reacceleration condition, and a constant speed reacceleration condition, the dividing module being configured to:
taking a first area corresponding to zero accelerator pedal opening in an initial acceleration response chart with empty acceleration as an area corresponding to a sliding working condition;
taking a second area of the initial acceleration response graph with the empty acceleration, which is not more than the vehicle speed corresponding to each maximum acceleration corresponding to each accelerator pedal opening, as an area corresponding to a starting working condition;
taking a third area corresponding to zero acceleration in the initial acceleration response diagram with the empty acceleration as an area corresponding to a uniform-speed working condition;
and taking a fourth area with acceleration greater than zero in the remaining areas as an area corresponding to a constant speed re-acceleration working condition, and taking a fifth area with acceleration less than zero as an area corresponding to a constant speed re-deceleration working condition, wherein the remaining areas are areas except the first area, the second area and the third area in the initial acceleration response diagram with the empty acceleration.
8. The accelerator pedal map generating apparatus according to claim 7, wherein the perfecting module is configured to:
substituting the vehicle speed corresponding to each position in the first area into a first formula aiming at the sliding working condition to obtain and write the acceleration of each position in the first area, wherein the first formula is as follows:
wherein a is the acceleration, T, of each position in the first region 1 Is the engine friction torque, i n The speed ratio is a gear ratio corresponding to each position in the first area, eta is transmission system efficiency, r is tire rolling radius, A, B, C is a constant term coefficient, a primary term coefficient and a secondary term coefficient corresponding to a sliding resistance curve, v is a vehicle speed corresponding to each position in the first area, delta is a rotating mass conversion coefficient, and m is test mass;
aiming at starting working conditions, according to the corresponding accelerator pedal opening degrees of all positions in the second area and the equivalent relation between the accelerator pedal opening degrees and the accelerations, the accelerations of all positions in the second area are obtained and written;
writing zeros into each position in the third region for constant speed conditions;
aiming at a uniform re-acceleration working condition, according to a first relation, a second relation and vehicle speeds and accelerator pedal opening degrees corresponding to all positions in a fourth area, obtaining and writing the acceleration of all positions in the fourth area, wherein the first relation is a conversion formula of the accelerator pedal opening degrees and the accelerator pedal stroke increment, and the second relation is used for representing the acceleration corresponding to different accelerator pedal stroke increment when different vehicle speeds;
aiming at the uniform speed re-deceleration working condition, according to a third relation, a fourth relation and the corresponding speeds and accelerator pedal openings of all positions in a fifth area, obtaining and writing the accelerations of all positions in the fifth area, wherein the third relation is a conversion formula of the accelerator pedal opening and the accelerator pedal stroke decrement, and the fourth relation is used for representing the accelerations corresponding to different accelerator pedal stroke decrements at different speeds;
thus, a complete acceleration response diagram is obtained.
9. An accelerator pedal map generating apparatus, characterized in that it comprises a processor, a memory, and an accelerator pedal map generating program stored on the memory and executable by the processor, wherein the accelerator pedal map generating program, when executed by the processor, implements the steps of the accelerator pedal map generating method according to any one of claims 1 to 5.
10. A readable storage medium, characterized in that an accelerator pedal map generation program is stored on the readable storage medium, wherein the accelerator pedal map generation program, when executed by a processor, realizes the steps of the accelerator pedal map generation method according to any one of claims 1 to 5.
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