CN111731095A - Accelerator pedal output voltage adjusting method and system, computer equipment and vehicle - Google Patents
Accelerator pedal output voltage adjusting method and system, computer equipment and vehicle Download PDFInfo
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- CN111731095A CN111731095A CN201910227747.3A CN201910227747A CN111731095A CN 111731095 A CN111731095 A CN 111731095A CN 201910227747 A CN201910227747 A CN 201910227747A CN 111731095 A CN111731095 A CN 111731095A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
- B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
- B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
- B60K2026/024—Adjustable consoles, e.g. for changing position of mounting casings
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Abstract
The invention relates to an output voltage adjusting method of an accelerator pedal, a system, computer equipment and a vehicle thereof, wherein the method comprises the following steps: acquiring vehicle acceleration information in a current judgment period at preset time intervals; determining the driving style of the current driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles; determining a type identification value corresponding to the driving style of the current driver; each driving style is preset with a type identification value; and adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver. The system and the computer equipment are carriers for realizing the method, and the vehicle comprises the carriers. By implementing the invention, the technical problem that the relation curve between the opening degree of the accelerator pedal and the output voltage cannot be automatically and rapidly adjusted according to the real-time driving operation style in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of vehicle driving, in particular to an accelerator pedal output voltage adjusting method and system, computer equipment and a vehicle.
Background
At the present stage, a relation curve of the opening degree of the accelerator pedal and the output voltage is calibrated and frozen when the accelerator pedal leaves a factory, some vehicle types only have one opening degree and output voltage curve, and some vehicle types have various opening degree and output voltage curves, but are mainly implemented by setting a driving mode. The relationship between the accelerator pedal opening and the output voltage is adjusted by setting the driving mode, and specifically, a plurality of driving modes such as an economy mode, a normal mode, and a sport mode are provided therein to correspond to different types of accelerator pedal opening and output voltage curves. However, this adjustment method requires the driver to set the adjustment mode by himself, and the mode will not be automatically changed after the adjustment mode is set, which makes it difficult to meet the use requirements under different road conditions.
Therefore, the existing adjusting mode of the opening degree and the output voltage of the accelerator pedal has certain limitation, and is mainly embodied in that automatic rapid adjustment cannot be carried out according to the real-time operation style of driving. The mode of manually setting the driving mode to adjust the power output of the vehicle needs to be switched manually according to the running condition from time to time by a driver, otherwise, better driving experience cannot be continuously obtained. Such as too slow speed increase in the economy mode or easy running with a vehicle at a low speed in the sport mode, and the manual driving mode switching increases the operation load of the driver.
Disclosure of Invention
The invention aims to provide an accelerator pedal output voltage adjusting method and system, computer equipment and a vehicle, and aims to solve the technical problem that in the prior art, the relation curve between the opening degree of an accelerator pedal and the output voltage cannot be automatically and quickly adjusted according to the real-time driving operation style.
To achieve the object of the present invention, according to a first aspect, an embodiment of the present invention provides an accelerator pedal output voltage adjusting method, including the steps of:
acquiring vehicle acceleration information in a current judgment period at preset time intervals;
determining the driving style of the current driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles;
determining a type identification value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
and adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver.
Preferably, the adjusting the relationship curve between the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver includes:
acquiring identification bit information [ A, B, C, D, E ]; the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state;
and adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the comparison result of the type identification value and a preset level value and the identification position information.
Preferably, the preset level value comprises a first level value and a second level value, and the second level value is smaller than the first level value;
wherein, the adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the identification position comprises the following steps:
when the identification position information is [1,0,0,0,0], setting a relation curve of the opening degree of the accelerator pedal and the output voltage, and taking an initial setting curve as an actual output curve;
when the identification bit information is [1,0,0,0,0] or [0,0,1,0,0], if the type identification value in the current judgment period is greater than the first level value and the type identification value in the last judgment period is less than or equal to the first level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, and setting the identification bit as [0,1,0,0,0 ].
Preferably, the adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the identification position further comprises:
when the identification bit information is [1,0,0,0,0] or [0,1,0,0,0], if the type identification value of the driver in the current judgment period is smaller than the second level value and the type identification value in the last judgment period is larger than or equal to the second level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, and setting the identification bit as [0,0,1,0,0 ].
Preferably, the adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the identification position further comprises:
when the identification bit information is [0,1,0,0,0], if the vehicle speed is less than or equal to a first vehicle speed or the exchange operation frequency of the accelerator pedal and the brake pedal is greater than or equal to a first frequency, setting a relation curve of the opening degree of the accelerator pedal and the output voltage as an actual output curve by using an initial setting curve, and setting the identification bit as [1,0,0,1,0] until the conditions that the vehicle speed is greater than the first vehicle speed, the exchange operation frequency of the accelerator pedal and the brake pedal is less than the first frequency and the vehicle continuously runs for a first running distance are met simultaneously, setting the identification bit as [1,0,0,0 ];
preferably, the adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the identification position further comprises:
when the flag bit information is [0,0,1,0,0], if the accelerator pedal opening degree change rate is larger than or equal to a first change rate, setting a relation curve of the accelerator pedal opening degree and the output voltage as an actual output curve by using an initial setting curve, and setting the flag bit as [1,0,0,0,1] until the accelerator pedal opening degree change rate is smaller than the first change rate and the vehicle continuously runs for a first driving distance, and setting the flag bit as [1,0,0,0 ].
Preferably, the calculating of the basic output voltage gain corresponding to the accelerator pedal opening according to the type identification value is specifically calculated according to the following formula:
wherein, PstdGain of basic output voltage, s, corresponding to opening of accelerator pedaldN is a predetermined value for the identified driver profile value.
Preferably, the adjusting the relation curve of the accelerator pedal opening degree and the output voltage according to the basic output voltage gain and the initial gain comprises:
when theta is less than or equal to β1Setting the relation between the opening degree of an accelerator pedal and the output voltage to be 0;
when β1When theta is less than or equal to k, the relation between the opening degree of the accelerator pedal and the output voltage is set to be α DEG (theta- β)1)；
When k < theta < β2When U is less than 1, the relation between the opening degree of the accelerator pedal and the output voltage is set to be α. Pstd(θ-k)+α(k-β1)；
When β2When theta is less than or U is more than or equal to 1, the relation between the opening degree of the accelerator pedal and the output voltage is set to be U-min (α. P)std(θ-k)+α(k-β1),1)；
Where U is the output voltage, θ is the accelerator opening, α is the initial gain, β1And β2Are all accelerator pedal opening dead band nodes, β2Greater than β1And k is an output voltage gain change node.
Preferably, k is calculated according to the following formula:
preferably, wherein said β1Calculated according to the following formula:
to achieve the object of the present invention, according to a second aspect, an embodiment of the present invention provides an accelerator pedal output voltage adjustment system including:
the first information acquisition unit is used for acquiring vehicle acceleration information in a current judgment period at intervals of preset time;
the first determining unit is used for determining the driving style of the current driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles;
a second determination unit for determining a type recognition value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
and the output voltage adjusting unit is used for adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver.
Preferably, the output voltage adjusting unit includes a second information obtaining unit and a first adjusting unit, and the second information obtaining unit is configured to obtain identification bit information [ a, B, C, D, E ]; the first adjusting unit is used for adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the comparison result of the type identification value and a preset level value and the identification position information;
the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state.
To achieve the object, according to a third aspect, an embodiment of the invention provides a computer device, including a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the method for adjusting the output voltage of the accelerator pedal according to the first aspect.
To achieve the object, according to a fourth aspect, an embodiment of the invention provides a vehicle including the accelerator pedal output voltage adjustment system according to the second aspect or the computer apparatus according to the third aspect.
The technical scheme has the following beneficial effects:
the embodiment of the invention provides an accelerator pedal output voltage adjusting method, an accelerator pedal output voltage adjusting system, computer equipment and a vehicle, and particularly, the embodiment of the invention acquires vehicle acceleration information in a current judgment period at intervals of preset time, determines the current driving style of a driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles, knows the expectation of the driver on power output, and presets a type identification value for each driving style, wherein the type identification value can be used for determining an output voltage gain corresponding to the opening degree of an accelerator pedal. Based on the above, the adjustment control strategy of the relation curve between the opening degree of the accelerator pedal and the output voltage can be determined according to the type identification value corresponding to the driving style, so that the driver can obtain better driving experience. The technical problem that in the prior art, the relation curve between the opening degree of the accelerator pedal and the output voltage cannot be automatically and quickly adjusted according to the real-time driving operation style is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for adjusting an output voltage of an accelerator pedal according to a first embodiment of the present invention.
FIG. 2 shows P when n is 5stdAnd sdIs a graph of the relationship of (A).
FIG. 3 is a schematic diagram illustrating an initial relationship curve between an opening of an accelerator pedal and an output voltage according to an embodiment of the invention.
FIG. 4 is a comparison diagram of output voltages corresponding to the same accelerator opening for different types of drivers when n is 5 according to the first embodiment of the present invention.
FIG. 5 is a block diagram β illustrating an embodiment of the present invention1Example of the output voltage curve before and after the accelerator pedal adjustment for the driver a at 0.1.
Fig. 6 is an example of an output voltage curve before and after adjustment of an accelerator pedal by a driver B in the first embodiment of the present invention.
FIG. 7 shows β when n is 5 according to one embodiment of the present invention1And sdIs a graph of the relationship of (A).
FIG. 8 is a block diagram β illustrating an embodiment of the present invention1Example of the output voltage curve before and after accelerator pedal adjustment for driver a at 0.068.
Fig. 9 is a schematic structural diagram of an accelerator pedal output voltage adjustment system according to a second embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a computer device according to a third embodiment of the present invention.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
An embodiment of the present invention provides a method for adjusting an output voltage of an accelerator pedal, referring to fig. 1, the method includes the following steps:
s1, acquiring vehicle acceleration information in the current judgment period at preset time intervals;
specifically, in step S1, the current determination period is in units of the driving range of the vehicle, for example, 10 km; a time interval, for example, 10 minutes, is preset, and the vehicle automatically acquires acceleration information during which the vehicle has traveled 10km by the current time every 10 minutes.
S2, determining the driving style of the current driver according to the matching result of the vehicle acceleration information and the multiple preset driving styles;
specifically, the real-time recognition of the driving style is a precondition for the adjustment of the vehicle power output, and the present embodiment takes the operation consistency level as a determination condition whether the style of the current driving is aggressive or robust in step S2. Generally, the more robust the style of driver, the more consistent the dynamics of the vehicle it controls. When driving straight, the vehicle speed controlled by the steady driver changes slowly, and the change of the acceleration is small, so that the shaking of the vehicle body posture caused by the change is small. And the more aggressive the style of driver, the more discrete the dynamics of the vehicle it controls. For example, when driving straight, the speed of a vehicle controlled by a driver with an aggressive style changes rapidly, and the vehicle is usually driven at a high speed, but is limited by road conditions, such as speed limit, other traffic participants, and the like, and often needs to be accelerated and decelerated frequently, so that the acceleration change is large, and the vehicle posture shake is also large. The consistency of the acceleration change of the vehicle and the statistical characteristics within a period of time can be used for identifying the driving style at the current moment, the recording time of the statistical characteristics is properly marked, and the identification result of the driving style which is continuously updated within a short time can be obtained.
Specifically, the acceleration distribution of a certain driving distance (having threshold conditions such as vehicle speed and turning angle) of the driver under a specific working condition is counted to avoid recording atypical driving working conditions such as backing up and congestion, the specific working condition comprises an acceleration driving working condition, a deceleration driving working condition and a constant speed driving working condition, each working condition has corresponding conditions for starting and ending recording, and then the consistency performance of vehicle driving is determined according to the acceleration distribution conditions of the acceleration driving working condition, the deceleration driving working condition and the constant speed driving working condition.
For example: driver a drives the vehicle for 10km (L ═ 10km), during which the acceleration pattern recording is triggered 5 times (n)a5), the standard deviation of the acceleration data generated by the 5 triggers is calculated to be 1m/s2(σa＝1m/s2) The recording of the deceleration working condition is triggered 4 times (n)d4), calculating the standard deviation of the acceleration data generated by the 4 triggers to be 2m/s2(σd＝2m/s2) The constant working condition record is triggered for 3 times (n)c3) the standard deviation of the acceleration data generated by these 3 triggers was calculated to be 0.5m/s2(σc＝0.5m/s2). Calculating the standard deviation of the standard deviation and the standard deviation of each level of set working conditions of the driver set by the 10-level preset driving styleSquare root value sigmaa_h(kj)，σd_h(kj)，σc_h(kj)，kjTaking the sum of the root mean square values of 3 working condition settings as 1,2, …,10, a total of 10 values are obtained, such as the 4 th (k)j' -4) is minimum, it is preliminarily considered that the operation style of the current driver is closest to the set 4 th level driver.
S3 determining a type recognition value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
specifically, in step S3 of the present embodiment, based on the 4 th-level preset driving style determined in step S2, the type recognition value recognized by the driver is-0.25 assuming that the output value set by the 4 th driver is-0.25.
When the type identification value is less than zero, the driving style of the driver is represented as a stable type, and when the type identification value is greater than zero, the driving style of the driver is represented as an aggressive type, and the larger the type identification value is, the more aggressive the driving style is, and the smaller the type identification value is, the more stable the driving style is.
And S4, adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the current driving style of the driver.
Specifically, in step S4 of the present embodiment, the accelerator pedal used in most vehicles is an electronic pedal, and is not directly mechanically connected to the throttle valve of the engine, but is electrically connected thereto. The electronic accelerator pedal converts the opening degree of the accelerator pedal pressed by a driver into a voltage value to be output, or an analog voltage, or a digital voltage represented by a TTL level after being processed by a controller, wherein the voltage value is used as a voltage parameter output by the electronic accelerator pedal to an engine management system or a motor control coefficient, after the engine management system or the motor control system receives the voltage value input by the electronic accelerator pedal, the acceleration or deceleration intention of the driver is judged according to the value and the change condition of the voltage value, and then the fuel injection quantity, the ignition advance angle or the voltage and/or the current of the motor are adjusted to adjust the output power of the engine or the motor, so that the power response of a vehicle conforms to the operation expectation of the driver. Therefore, the power response of the vehicle can be indirectly adjusted by adjusting the output voltage of the accelerator pedal, and the power demand of the driver is further met.
If the driving style of a driver is more aggressive, the driver needs faster vehicle power response, and the small-amplitude accelerator pedal opening needs larger power system output torque, so that the pedal output voltage corresponding to the accelerator pedal opening needs to be increased; if the driving style of the driver is more stable, the driver needs more accurate vehicle power response, the output torque of the power system under the daily use working condition can be more accurately adjusted, and the pedal output voltage corresponding to the opening degree of the accelerator pedal needs to be reduced. Therefore, step S4 of the present embodiment proposes to adjust the relationship curve of the accelerator pedal opening degree and the output voltage according to the type recognition value corresponding to the current driving style of the driver.
In one embodiment, the step S4 includes:
s41, acquiring identification bit information [ A, B, C, D, E ]; the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state;
and S42, adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the comparison result of the type identification value and the preset level value and the identification position information.
Specifically, in this embodiment, setting a of the flag bit information [ a, B, C, D, E ] to 1 indicates that the driver type does not exceed the aggressive or conservative degree of the threshold, and the accelerator pedal at the current time is the initial gain; setting a value B as 1 to show that the type recognition result of the driver exceeds the threshold value of the aggressive style, and judging that the current driver is a typical aggressive style driver and the accelerator pedal at the current moment is the gain of the aggressive style; setting C to 1, namely, the driver type identification result exceeds a threshold value of a steady style, judging that the current driver is a typical driver with the steady style, and the accelerator pedal at the current moment is a gain of the steady style; setting D to 1 to indicate that the currently adopted aggressive style gain cannot meet the running requirement of the congestion state and needs to be switched to the initial gain; and E, setting 1 to show that the currently adopted robust style gain cannot meet the requirements of accelerating starting or overtaking of a driver, and needs to be switched to the initial gain.
The initial gain may be an initial gain of the output voltage corresponding to the accelerator opening when the vehicle is running, or may be a gain corresponding to a type identification value corresponding to the driving style being 0.
The method comprises the following steps that the aggressive degree of driver type identification is classified according to percentiles, and the more aggressive the style of a driver, the higher the type identification value of the driver; the preset level value comprises a first level value and a second level value, and the second level value is smaller than the first level value; the first level value indicates that the type recognition value of 80% of the drivers is below the first level value, and the second level value indicates that the type recognition value of 20% of the drivers is below the second level value.
In one embodiment, the step S42 includes:
in case 1, when the flag bit information is [1,0,0,0,0], that is, the current driver type identification value does not exceed the aggressive or conservative degree of the threshold, a relationship curve of the accelerator pedal opening and the output voltage is set, and the initial setting curve is used as the actual output curve; the threshold value can be set according to the frequency requirement of the adjustment output curve, the higher the threshold value is, the times of adjustment are reduced, energy can be saved, but the real-time performance is poor; the lower the threshold value is, the higher the number of times of adjustment is, and the real-time performance is good, but the energy consumption is high. When the vehicle has just started running, case 1 is entered.
And 2, when the identification bit information is [1,0,0,0,0] or [0,0,1,0,0], if the type identification value in the current judgment period is greater than the first level value and the type identification value in the last judgment period is less than or equal to the first level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, then adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, replacing the initial setting curve of the condition 1 to be used as an actual output curve, and setting the identification bit as [0,1,0,0,0 ].
And 3, when the identification bit information is [1,0,0,0,0] or [0,1,0,0,0], if the type identification value of the driver in the current judgment period is smaller than the second level value and the type identification value in the last judgment period is larger than or equal to the second level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, then adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, replacing the initial setting curve of the case 1 to be used as an actual output curve, and setting the identification bit to be [0,0,1,0,0 ].
And 4, when the identification bit information is [0,1,0,0,0], if the vehicle speed is less than or equal to the first vehicle speed or the exchange operation frequency of the accelerator pedal and the brake pedal is greater than or equal to the first frequency, setting a relation curve of the opening degree of the accelerator pedal and the output voltage as an actual output curve by using an initial setting curve, and setting the identification bit as [1,0,0,1,0] until the conditions that the vehicle speed is greater than the first vehicle speed, the exchange operation frequency of the accelerator pedal and the brake pedal is less than the first frequency and the vehicle continuously runs for the first running distance are met simultaneously, and setting the identification bit as [1,0,0,0,0] are met.
In the present embodiment, the first vehicle speed is preferably, but not limited to, 20km/h, the first frequency is preferably, but not limited to, 0.5Hz, and the first driving range is preferably, but not limited to, 5 km.
In case 5, when the flag bit information is [0,0,1,0,0], if the accelerator pedal opening degree change rate is equal to or greater than the first change rate, the relationship curve between the accelerator pedal opening degree and the output voltage is set with the initial set curve as the actual output curve, and the flag bit is set to [1,0,0,0,1], until the accelerator pedal opening degree change rate is less than the first change rate and the vehicle continues to travel for the second travel distance, the flag bit is set to [1,0,0,0 ].
In the present embodiment, the first change rate is preferably, but not limited to, 0.8/s, and the second mileage is preferably, but not limited to, 5 km.
In an embodiment, the calculating the basic output voltage gain corresponding to the accelerator pedal opening according to the type identification value is specifically calculated according to the following formula:
wherein, PstdGain of basic output voltage, s, corresponding to opening of accelerator pedaldFor the identified driver style value, n is a preset value, and n is an adjustment parameter distributed according to the driver type.
In this example, n ∈ [1,10 ]]，sd∈[-1,1]When n is 1, PstdIs (0.75, 1.25), when n is 10, PstdThe range of (1.5) is (0.5).
For example, as shown in FIG. 2, P is set to 5 when n is set to PstdAnd sdIs a graph of the relationship of (A).
If the current driver type s is recognizeddIs 0.3, which means that the current degree of excitement of the driver style is recognized to be 30%, n is set to 5, and the basic voltage output gain P is calculated according to the formula (1)stdThe output voltage of the accelerator pedal is 1.32 times of the originally set output voltage, which is 1.32, namely the same accelerator opening degree, and the output voltage is increased by 32% relative to the originally set output voltage under the condition that other conditions are not changed.
Specifically, the setting of the n value is related to the probability distribution of the style type distribution of the driver of the vehicle model target user, the basic voltage output gain corresponding to the 80-percentile excitation level is set to be 1.3, and the value of n is reversely deduced by the formula (1). If the 80% percentile excitation level of the target users of the ordinary class-A cars is 0.3 (namely 80% of the sample excitation level is less than or equal to 0.3), s isdWhen equal to 0.3, PstdThe inverse derivation according to equation (1) for 1.3, n rounded to 5.
That is, the value of n is determined by the driving style proportion of the whole target population, and for example, the larger the proportion of aggressive style drivers in the target population is, the lower the value of n is. Thus, the driving habits of the target group can be matched more largely when the vehicle accelerator pedal initially outputs the gain.
In one embodiment, said adjusting the accelerator pedal opening versus output voltage curve according to said basic output voltage gain and initial gain comprises:
when theta is less than or equal to β1Setting the relation between the opening degree of an accelerator pedal and the output voltage to be 0;
when β1When theta is less than or equal to k, the relation between the opening degree of the accelerator pedal and the output voltage is set to be α DEG (theta- β)1)；
When k < theta < β2When U is less than 1, the relation between the opening degree of the accelerator pedal and the output voltage is set to be α. Pstd(θ-k)+α(k-β1)；
When β2When theta is less than or U is more than or equal to 1, the relation between the opening degree of the accelerator pedal and the output voltage is set to be U-min (α. P)std(θ-k)+α(k-β1),1)；
Where U is the output voltage, θ is the accelerator opening, α is the initial gain, β1An accelerator pedal opening dead zone node near 0, β2Accelerator pedal opening dead band node around 1, β2Greater than β1And k is an output voltage gain change node.
Specifically, as shown in fig. 3, a graph of the relationship between the accelerator pedal opening and the output voltage in the prior art is shown, in fig. 3, θ is the percentage of the accelerator pedal opening, UpedalIs the percent of the output voltage of the accelerator pedal relative to the maximum output voltage, excluding β1And β2The relationship between the accelerator pedal opening and the output voltage without adjustment is called an initial opening and voltage relationship, and the slope of the linear relationship is set to α, namely the initial gain, β in fig. 31And β20.1 and 0.9, respectively.
If the relationship between the accelerator pedal opening and the output voltage is adjusted by directly using the basic output voltage gain, assuming that n is 5, the output voltages of different types of drivers at the same accelerator pedal opening are as shown in fig. 4. Because at different pedal opening positions, the driver's demand for acceleration is also different. Such as a small pedal opening position, even an aggressive driver may wish to relatively finely adjust the pedal torque request to the engine or transmission; whereas a large pedal opening position, even for a robust driver, is desirable to achieve a relatively high pedal torque request to the engine or transmission. Therefore, in the embodiment, for different types of drivers, not only the basic output voltage gain is adjusted, but also the node of the gain change is added, and at the set node opening k, the gain slope is switched to the product of the basic output voltage gain and the initial gain so as to meet the torque requests of the powertrain system of different types of drivers at different positions of the accelerator pedal opening.
In one embodiment, k is calculated according to the following formula:
wherein, the selection of the k node and the driving type identification value sdCorrelation, one bit after the decimal point is generally reserved.
First, for the vehicle type with n equal to 5, the type judgment of the a driver is 0.3, and the description identifies that the current style excitement degree of the driver is 30%, assuming that the initial slope α is 1.25, β1＝0.1，β2When the output voltage curve of the driver after the accelerator pedal adjustment is 0.9, the following formula (3) shows that:
the corresponding curve is shown in fig. 5, and it can be seen from fig. 5, β1And the gain before the slope change node coincides with the initial gain and the slope of the gain after the slope change node k coincides with the product of the basic output voltage gain and the initial gain, β2Since the increase in gain slope becomes 0.73.
Secondly, similarly for the vehicle type with n equal to 5, the type judgment of the B driver is-0.3, which indicates that the robustness of recognizing the current driver style is 30%, assuming that the initial slope α is equal to 1.25, β1＝0.1，β2When the output voltage curve of the driver after the accelerator pedal adjustment is 0.9, the following formula (4) shows that:
the corresponding curve is shown in fig. 6, as can be seen from fig. 6, at β1The gain thereafter is the product of the base output voltage gain and the initial gain, and after the slope change node k, the slope of the curve coincides with the initial gain slope until β is reached2The value of which remains unchanged.
In one embodiment, the β1Calculated according to the following equation (5):
specifically, the dead zone β of the output voltage2Will be adjusted according to the driver style, but β1The dead zone is set, voltage cannot be output after the accelerator pedal is stepped in the small accelerator pedal opening range, and the dead zone is set to prevent the pedal from reacting too sensitively and prevent the vehicle from accelerating suddenly due to false triggering. But the range of this dead band can also be adjusted according to the style of the driver. The more aggressive the driver's style, the smaller its initial dead zone, and the more aggressive the driver's style, the larger its initial dead zone, but it also has a certain range.
N is set to 5, β1And sdIs shown in fig. 7, then the initial dead zone β1For a vehicle model with n-5, the driver type decision is 0.3, indicating that the current driver style aggressiveness is identified to be 30%, assuming an initial slope αint1.25, start dead band node β1Calculated according to equation (6) to be equal to 0.068, the accelerator pedal adjusted output voltage curve for that driver is as follows:
the corresponding curve is shown in fig. 8.
An embodiment of the present invention provides an accelerator pedal output voltage adjusting system, which is used for implementing the method described in the first embodiment, with reference to fig. 9, and the system specifically includes:
a first information obtaining unit 1, configured to obtain vehicle acceleration information in a current determination period at intervals of a preset time;
a first determining unit 2, configured to determine a driving style of a current driver according to a matching result of the vehicle acceleration information and a plurality of preset driving styles;
a second determination unit 3 for determining a type recognition value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
and the output voltage adjusting unit 4 is used for adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver.
In an embodiment, the output voltage adjusting unit 4 includes a second information obtaining unit 41 and a first adjusting unit 42, the second information obtaining unit 41 is configured to obtain identification bit information [ a, B, C, D, E ]; the first adjusting unit 42 is configured to adjust a relation curve between the opening degree of the accelerator pedal and the output voltage according to the comparison result between the type identification value and the preset level value and the identification position information;
the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state.
For the system disclosed in the second embodiment, since it corresponds to the method disclosed in the first embodiment, reference may be made to the description of the method for the relevant points, and details are not repeated here.
As shown in fig. 10, a third embodiment of the present invention provides an electronic device 100, which includes a memory 101, a processor 102, and a computer program 103 stored in the memory 101 and executable on the processor 102, where when the processor 102 executes the computer program 103, the method for generating a flowchart with a hover prompt according to the first embodiment is implemented.
It should be noted that the foregoing explanation of the embodiment method is also applicable to the electronic device of the third embodiment, and the implementation principle is similar, and is not described herein again.
A fourth embodiment of the invention provides a vehicle including the accelerator pedal output voltage adjustment system according to the second embodiment or the computer device according to the third embodiment.
As can be seen from the above description of the embodiments:
the embodiment of the invention provides an accelerator pedal output voltage adjusting method, an accelerator pedal output voltage adjusting system, computer equipment and a vehicle, and particularly, the embodiment of the invention acquires vehicle acceleration information in a current judgment period at intervals of preset time, determines the current driving style of a driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles, knows the expectation of the driver on power output, and presets a type identification value for each driving style, wherein the type identification value can be used for determining an output voltage gain corresponding to the opening degree of an accelerator pedal. Based on the above, the adjustment control strategy of the relation curve between the opening degree of the accelerator pedal and the output voltage can be determined according to the type identification value corresponding to the driving style, so that the driver can obtain better driving experience. The technical problem that in the prior art, the relation curve between the opening degree of the accelerator pedal and the output voltage cannot be automatically and quickly adjusted according to the real-time driving operation style is effectively solved.
In the description of the present specification, different embodiments or examples and features of different embodiments or examples described in the specification may be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (14)
1. An accelerator pedal output voltage adjusting method is characterized by comprising the following steps:
acquiring vehicle acceleration information in a current judgment period at preset time intervals;
determining the driving style of the current driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles;
determining a type identification value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
and adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver.
2. The accelerator pedal output voltage adjusting method according to claim 1, wherein the adjusting of the accelerator pedal opening degree-to-output voltage relation according to the type recognition value corresponding to the driving style of the current driver comprises:
acquiring identification bit information [ A, B, C, D, E ]; the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state;
and adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the comparison result of the type identification value and a preset level value and the identification position information.
3. The accelerator pedal output voltage adjusting method according to claim 2, wherein the preset level value includes a first level value and a second level value, the second level value being smaller than the first level value;
wherein, the adjusting the relation curve of the opening degree of the accelerator pedal and the output voltage according to the identification position comprises the following steps:
when the identification position information is [1,0,0,0,0], setting a relation curve of the opening degree of the accelerator pedal and the output voltage, and taking an initial setting curve as an actual output curve;
when the identification bit information is [1,0,0,0,0] or [0,0,1,0,0], if the type identification value in the current judgment period is greater than the first level value and the type identification value in the last judgment period is less than or equal to the first level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, and setting the identification bit as [0,1,0,0,0 ].
4. The method of adjusting an accelerator pedal output voltage according to claim 3, wherein adjusting an accelerator pedal opening versus output voltage curve based on the flag further comprises:
when the identification bit information is [1,0,0,0,0] or [0,1,0,0,0], if the type identification value of the driver in the current judgment period is smaller than the second level value and the type identification value in the last judgment period is larger than or equal to the second level value, calculating a basic output voltage gain corresponding to the opening degree of the accelerator pedal according to the type identification value, adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the basic output voltage gain and the initial gain, and setting the identification bit as [0,0,1,0,0 ].
5. The method of adjusting an accelerator pedal output voltage according to claim 3, wherein adjusting an accelerator pedal opening versus output voltage curve based on the flag further comprises:
when the identification bit information is [0,1,0,0,0], if the vehicle speed is less than or equal to a first vehicle speed or the exchange operation frequency of the accelerator pedal and the brake pedal is greater than or equal to a first frequency, setting a relation curve of the opening degree of the accelerator pedal and the output voltage as an actual output curve by using an initial setting curve, and setting the identification bit as [1,0,0,1,0] until the conditions that the vehicle speed is greater than the first vehicle speed, the exchange operation frequency of the accelerator pedal and the brake pedal is less than the first frequency and the vehicle continuously runs for a first running distance are met simultaneously, and setting the identification bit as [1,0,0,0 ].
6. The method of adjusting an accelerator pedal output voltage according to claim 3, wherein adjusting an accelerator pedal opening versus output voltage curve based on the flag further comprises:
when the flag bit information is [0,0,1,0,0], if the accelerator pedal opening degree change rate is larger than or equal to a first change rate, setting a relation curve of the accelerator pedal opening degree and the output voltage as an actual output curve by using an initial setting curve, and setting the flag bit as [1,0,0,0,1] until the accelerator pedal opening degree change rate is smaller than the first change rate and the vehicle continuously runs for a first driving distance, and setting the flag bit as [1,0,0,0 ].
7. The accelerator pedal output voltage adjustment method according to claim 2, wherein the calculation of the basic output voltage gain corresponding to the accelerator pedal opening degree based on the type identification value is specifically calculated according to the following formula:
wherein, PstdGain of basic output voltage, s, corresponding to opening of accelerator pedaldN is a predetermined value for the identified driver profile value.
8. The accelerator pedal output voltage adjustment method according to claim 7, wherein said adjusting an accelerator pedal opening versus output voltage curve based on the base output voltage gain and initial gain comprises:
when theta is less than or equal to β1Setting the relation between the opening degree of an accelerator pedal and the output voltage to be 0;
when β1<When theta is less than or equal to k, the relation between the opening degree of the accelerator pedal and the output voltage is set to be α DEG (theta- β)1)；
When k is<θ<β2And U is<In the 1-time state, the relation between the accelerator pedal opening and the output voltage is set to be U equal to α. Pstd(θ-k)+α(k-β1)；
When β2<When theta or U is more than or equal to 1, the relation between the opening degree of the accelerator pedal and the output voltage is set to be U-min (α. P)std(θ-k)+α(k-β1),1)；
Where U is the output voltage, θ is the accelerator opening, α is the initial gain, β1And β2Are all accelerator pedal opening dead band nodes, β2Greater than β1And k is an output voltage gain change node.
9. The accelerator pedal output voltage adjusting method according to claim 8, wherein k is calculated according to the following formula:
10. the accelerator pedal output voltage adjustment method according to claim 8, wherein the β is1Calculated according to the following formula:
11. an accelerator pedal output voltage adjustment system, comprising:
the first information acquisition unit is used for acquiring vehicle acceleration information in a current judgment period at intervals of preset time;
the first determining unit is used for determining the driving style of the current driver according to the matching result of the vehicle acceleration information and a plurality of preset driving styles;
a second determination unit for determining a type recognition value corresponding to the driving style of the current driver; each driving style is preset with a type identification value;
and the output voltage adjusting unit is used for adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the type identification value corresponding to the driving style of the current driver.
12. The accelerator pedal output voltage adjusting system according to claim 11, wherein the output voltage adjusting unit includes a second information acquiring unit for acquiring identification bit information [ a, B, C, D, E ] and a first adjusting unit; the first adjusting unit is used for adjusting a relation curve of the opening degree of the accelerator pedal and the output voltage according to the comparison result of the type identification value and a preset level value and the identification position information;
the identification bit A represents an initial state, the identification bit B represents an aggressive state, the identification bit C represents a steady state, the identification bit D represents a road congestion state, and the identification bit E represents an acceleration intention state.
13. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of adjusting an output voltage of an accelerator pedal according to any one of claims 1 to 10 when executing the program.
14. A vehicle characterized by comprising an accelerator pedal output voltage adjustment system according to any one of claims 11 to 12 or a computer device according to claim 13.
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