CN111645661B - Method, device and equipment for calculating position of accelerator pedal of automobile and automobile - Google Patents
Method, device and equipment for calculating position of accelerator pedal of automobile and automobile Download PDFInfo
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- CN111645661B CN111645661B CN201911111387.7A CN201911111387A CN111645661B CN 111645661 B CN111645661 B CN 111645661B CN 201911111387 A CN201911111387 A CN 201911111387A CN 111645661 B CN111645661 B CN 111645661B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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Abstract
The invention discloses a method, a device and equipment for calculating the position of an accelerator pedal of an automobile and the automobile. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a method, a device and equipment for calculating the position of an accelerator pedal of an automobile and the automobile.
Background
An accelerator pedal is a device on an internal combustion engine that controls the amount of fuel supplied. During the running process of the vehicle, a driver controls the air inflow of the motor by controlling the stepping amount of an accelerator pedal, so that the rotating speed of the motor is controlled. The position sensor of the accelerator pedal is arranged at the position of the accelerator pedal, after the position sensor of the accelerator pedal collects position data of the accelerator pedal, the position data of the accelerator pedal is transmitted to the vehicle control unit in a voltage signal output mode, and the vehicle control unit determines the position of the accelerator pedal according to the voltage value of the voltage signal and controls the speed of the vehicle.
When the position of the accelerator pedal is analyzed by the vehicle control unit, the position of the accelerator pedal is generally calculated by using three parameters, namely a stored fixed zero-stroke voltage set value, a stored full-stroke voltage set value and a stored real-time voltage value detected by the accelerator pedal position sensor. For the accelerator pedal, as the service time increases, the zero stroke position and the full stroke position of the accelerator pedal also change, and correspondingly, the zero stroke voltage set value and the full stroke voltage set value of the accelerator pedal also correspondingly change. When the position of the accelerator pedal is analyzed by the vehicle control unit, the position of the accelerator pedal is always calculated by the stored fixed zero-stroke voltage set value and the full-stroke voltage set value. The position of the accelerator pedal calculated in this way is less accurate, since the zero and full travel positions of the accelerator pedal change continuously with increasing service time.
Disclosure of Invention
The invention aims to solve the problem that the accuracy of the calculated position of the accelerator pedal is low in the prior art. Therefore, the invention provides a method, a device and equipment for calculating the position of an accelerator pedal of an automobile and the automobile, and improves the accuracy of calculating the position of the accelerator pedal of the automobile.
In order to solve the above problem, an embodiment of the present invention discloses a method for calculating a position of an accelerator pedal of an automobile, the method including:
in an activity period of an accelerator pedal, acquiring a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal;
updating a pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value;
updating a pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
acquiring a real-time voltage value corresponding to the current position of the accelerator pedal;
and calculating the position of the accelerator pedal by using the minimum voltage value, the maximum voltage value and the real-time voltage value.
By adopting the technical scheme, the minimum voltage value and the maximum voltage value corresponding to the position of the accelerator pedal are obtained in one activity period of the accelerator pedal. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. And finally, calculating the position of the accelerator pedal by using the updated zero stroke voltage value, the updated full stroke voltage value and the updated real-time voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
Further, in the embodiment of the present invention, the minimum voltage value, the maximum voltage value, and the real-time voltage value are all collected by an accelerator pedal position sensor, and the calculation method further includes:
judging whether the minimum voltage value is larger than an open-circuit fault voltage threshold value of the accelerator pedal position sensor or not;
if yes, the step of updating the pre-stored zero travel voltage value of the accelerator pedal based on the minimum voltage value is carried out;
if not, judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
judging whether the maximum voltage value is smaller than a short-circuit fault voltage threshold value of the accelerator pedal position sensor or not;
if so, entering the step of updating the pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
if not, determining that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of the motor of the automobile to the safety threshold value.
By adopting the technical scheme, through setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the accelerator pedal position sensor has a short-circuit fault or an open-circuit fault, the zero stroke voltage value and the full stroke voltage value are not updated according to the wrong minimum voltage value and the wrong maximum voltage value detected by the accelerator pedal position sensor, but the rotating speed of the motor of the automobile is reduced to the safety threshold, so that the calculated position of the accelerator pedal has a larger error, and meanwhile, the safe and stable operation of the automobile is ensured by reducing the rotating speed of the motor of the automobile to the safety threshold.
Further, in the embodiment of the present invention, before the obtaining of the real-time voltage value corresponding to the current position of the accelerator pedal, the method further includes:
judging whether the real-time voltage value exceeds the short-circuit fault voltage threshold value and/or whether the real-time voltage value is lower than the open-circuit fault voltage threshold value;
if the real-time voltage value exceeds the short-circuit fault voltage threshold value and/or the real-time voltage value is lower than the open-circuit fault voltage threshold value, judging that the accelerator pedal position sensor has a fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
and if the real-time voltage value does not exceed the short-circuit fault voltage threshold and the real-time voltage value is not lower than the open-circuit fault voltage threshold, the step of calculating the position of the accelerator pedal by using the minimum voltage value, the maximum voltage value and the real-time voltage value is carried out.
By adopting the technical scheme, when the real-time voltage value acquired by the accelerator pedal position sensor exceeds the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, the accelerator pedal position sensor may have a short-circuit fault or an open-circuit fault, and further, the real-time voltage value acquired by the accelerator pedal position sensor may have a detection error.
Further, in the embodiment of the present invention, the pre-stored zero stroke voltage value of the accelerator pedal is specifically calculated by using the following formula:
wherein, the VzFor said zero stroke voltage value, said Vzs0Is the first zero stroke voltage value, said Vzs1Is the second zero stroke voltage valueV iszs2A third zero travel voltage value;
the V iszs2The Vzs1And said Vzs0Are calculated using the formula: vzsi＝Vzg+VzdjI is 0,1, 2; j is 1,2,3, wherein V iszgIs the standard zero stroke voltage value of the accelerator pedal, VzdjIs the zero stroke voltage error value of the accelerator pedal;
the pre-stored full-stroke voltage value of the accelerator pedal is calculated by adopting the following formula:
wherein, the VfFor the full stroke voltage value, the value Vfs0Is a first full stroke voltage value, said Vfs1At a second full stroke voltage value, said Vfs2Is a third full-stroke voltage value;
the V isfs0The Vfs1And said Vfs2Are calculated using the formula: vfsi＝Vfg-VfdjI is 0,1, 2; j is 1,2,3, wherein V isfgIs the standard full-stroke voltage value of the accelerator pedal, VfdjAnd the error value of the full-stroke voltage of the accelerator pedal is obtained.
By adopting the technical scheme, when the zero stroke voltage value and the full stroke voltage value are calculated, the zero stroke voltage error value of the accelerator pedal and the full stroke voltage error value of the accelerator pedal are considered, and the three zero stroke voltage values obtained by utilizing the zero stroke voltage error value are averaged to obtain the final zero stroke voltage value. And averaging the three full-stroke voltage values obtained by using the full-stroke voltage error value to obtain a final full-stroke voltage value. The precision of the finally obtained zero stroke voltage value and the full stroke voltage value is higher, and therefore the precision of the position of the accelerator pedal obtained through calculation is also higher.
Further, in an embodiment of the present invention, the updating the pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value includes:
taking the minimum voltage value as a zero stroke voltage value of the accelerator pedal;
the updating of the pre-stored full stroke voltage value of the accelerator pedal based on the maximum voltage value comprises:
and taking the maximum voltage value as a full-stroke voltage value of the accelerator pedal.
Further, in the embodiment of the present invention, the position of the accelerator pedal is calculated by using the following formula:
wherein, the PosnIs the position of the accelerator pedal, the VactFor said real-time voltage value, said VminFor the minimum voltage value, the VmaxIs the maximum voltage value.
Further, the embodiment of the invention discloses a device for calculating the position of an accelerator pedal of an automobile, which comprises:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a minimum voltage value and a maximum voltage value corresponding to the position of an accelerator pedal in one activity period of the accelerator pedal;
the first updating module is used for updating a pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value;
the second updating module is used for updating a prestored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
the second acquisition module is used for acquiring a real-time voltage value corresponding to the current position of the accelerator pedal;
and the calculating module is used for calculating the position of the accelerator pedal by utilizing the minimum voltage value, the maximum voltage value and the real-time voltage value.
Further, in the embodiment of the present invention, the method further includes:
the first judgment module is used for judging whether the minimum voltage value is larger than an open-circuit fault voltage threshold of the accelerator pedal position sensor or not, if so, the first updating module is started, and if not, the first control module is started;
the first control module is used for judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
the second judgment module is used for judging whether the maximum voltage value is smaller than the short-circuit fault voltage threshold of the accelerator pedal position sensor, if so, the second updating module is started, and if not, the second control module is started;
and the second control module is used for judging that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of the motor of the automobile to the safety threshold value.
Further, the embodiment of the invention discloses a computing device for the position of an accelerator pedal of an automobile, which comprises:
a memory for storing a computer program;
a processor implementing the steps of the method of calculating a position of an accelerator pedal of a vehicle as described in any one of the above when the computer program is executed.
Further, an embodiment of the present invention discloses an automobile, including: the system comprises an accelerator pedal, an accelerator pedal position sensor and a whole vehicle controller, wherein the accelerator pedal position sensor is arranged at the accelerator pedal;
the vehicle control unit is connected with the accelerator pedal position sensor, a computer program is stored in the vehicle control unit, and when the computer program is executed by a processor, the steps of the method for calculating the position of the accelerator pedal of the vehicle are realized.
The embodiment of the invention discloses a method, a device and equipment for calculating the position of an accelerator pedal of an automobile and the automobile, and has the following beneficial effects:
in one active period of the accelerator pedal, a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal are obtained. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. And finally, calculating the position of the accelerator pedal by using the updated zero stroke voltage value, the updated full stroke voltage value and the updated real-time voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the accelerator pedal position sensor has a short-circuit fault or an open-circuit fault, the zero stroke voltage value and the full stroke voltage value are not updated according to the wrong minimum voltage value and the wrong maximum voltage value detected by the accelerator pedal position sensor, but the rotating speed of the motor of the automobile is reduced to the safety threshold, so that the calculated position of the accelerator pedal is prevented from having a large error, and meanwhile, the safe and stable operation of the automobile is ensured by reducing the rotating speed of the motor of the automobile to the safety threshold.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the real-time voltage value acquired by the accelerator pedal position sensor exceeds the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, the accelerator pedal position sensor may have a short-circuit fault or an open-circuit fault, and further, the real-time voltage value acquired by the accelerator pedal position sensor may have a detection error.
Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1(a) is a schematic structural diagram of an automobile according to an embodiment of the present invention;
fig. 1(b) is an electrical schematic diagram of a vehicle control unit and an accelerator pedal position sensor according to an embodiment of the present invention;
FIG. 2(a) is a schematic flowchart of a first method for calculating the accelerator pedal position of an automobile according to embodiment 1 of the present invention;
FIG. 2(b) is a schematic flowchart of a second method for calculating the accelerator pedal position of an automobile according to embodiment 1 of the present invention;
FIG. 2(c) is a schematic flowchart of a third method for calculating the accelerator pedal position of an automobile according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for calculating a position of an accelerator pedal of an automobile according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of a device for calculating the position of an accelerator pedal of an automobile, disclosed in embodiment 3 of the present invention.
Reference numerals:
10: an accelerator pedal; 11: an accelerator pedal position sensor; 12: a vehicle control unit;
30: a first acquisition module; 31: a first update module; 32: a second update module; 33: a second acquisition module; 34: a calculation module;
40: a memory; 41: a processor.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
When the position of the accelerator pedal is analyzed by the vehicle control unit, the position of the accelerator pedal is generally calculated by using three parameters, namely a stored fixed zero-stroke voltage set value, a stored full-stroke voltage set value and a stored real-time voltage value detected by the accelerator pedal position sensor. For the accelerator pedal, as the service time increases, the zero stroke position and the full stroke position of the accelerator pedal also change, and correspondingly, the zero stroke voltage set value and the full stroke voltage set value of the accelerator pedal also correspondingly change. When the position of the accelerator pedal is analyzed by the vehicle control unit, the position of the accelerator pedal is always calculated by the stored fixed zero-stroke voltage set value and the full-stroke voltage set value. The position of the accelerator pedal calculated in this way is less accurate, since the zero and full travel positions of the accelerator pedal change continuously with increasing service time.
As shown in fig. 1(a) and 1(b), fig. 1(a) is a schematic structural diagram of an automobile disclosed in an embodiment of the present invention, and fig. 1(b) is a schematic electrical structural diagram of a vehicle control unit and an accelerator pedal position sensor disclosed in an embodiment of the present invention. As shown in fig. 1(a), the automobile includes an accelerator pedal 10, an accelerator pedal position sensor 11 provided at the accelerator pedal 10, and a vehicle controller 12.
As shown in fig. 1(b), the vehicle control unit 12 is connected to the accelerator pedal position sensor 11, the voltage input terminal VCC of the vehicle control unit 12 is connected to the voltage input terminal VCC of the accelerator pedal position sensor 11, the signal input terminal ACC _ S1 of the vehicle control unit 12 is connected to the signal output terminal Sig _1 of the accelerator pedal position sensor 11, the ground terminal GND _1 of the vehicle control unit 12 is connected to the money i ground terminal GND _1 of the accelerator pedal position sensor 11, when the accelerator pedal 10 moves to different positions, the accelerator pedal sensor 11 outputs different output voltages, and the voltage value corresponding to the output voltage of the accelerator pedal sensor 11 corresponds to one position of the accelerator pedal 10. In the automobile disclosed in the embodiment of the present invention, the vehicle controller 12 stores a computer program, and the computer program, when executed by a processor in the vehicle controller 12, implements the steps of the method for calculating the position of the accelerator pedal of the automobile mentioned in the following embodiment.
The following description will be made with reference to the vehicle provided in fig. 1(a) and 1(b) to describe a method for calculating the accelerator pedal position of the vehicle according to the following embodiments of the present invention.
Example 1
The following describes a method for calculating a position of an accelerator pedal of an automobile disclosed in embodiment 1 of the present invention with reference to fig. 2(a), fig. 2(b), and fig. 2(c), where fig. 2(a) is a schematic flow chart of a first method for calculating a position of an accelerator pedal of an automobile disclosed in embodiment 1 of the present invention, fig. 2(b) is a schematic flow chart of a second method for calculating a position of an accelerator pedal of an automobile disclosed in embodiment 1 of the present invention, and fig. 2(c) is a schematic flow chart of a third method for calculating a position of an accelerator pedal of an automobile disclosed in embodiment 1 of the present invention.
As shown in fig. 2(a), the method for calculating the accelerator pedal position of the vehicle includes:
s20: in one active period of the accelerator pedal, a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal are acquired.
Specifically, an active cycle of the accelerator pedal refers to an activity of the accelerator pedal from a zero position to an uppermost position or an activity of the accelerator pedal from an uppermost position to a zero position of the accelerator pedal. In one period of the accelerator pedal, the accelerator pedal position sensor outputs different voltage values corresponding to different positions of the accelerator pedal, and a minimum voltage value and a maximum voltage value are bound to exist in a plurality of voltage values.
S21: and updating the pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value.
Specifically, as an alternative embodiment of the present invention, the pre-stored zero stroke voltage value of the accelerator pedal is specifically calculated by using the following formula:
wherein, VzIs zero stroke voltage value, Vzs0Is the first zero stroke voltage value, Vzs1Is the second zero stroke voltage value, Vzs2A third zero travel voltage value;
Vzs2、Vzs1and Vzs0Are calculated using the formula: vzsi＝Vzg+VzdjI is 0,1, 2; j is 1,2,3, wherein VzgIs a standard zero stroke voltage value, V, of the accelerator pedalzdjIs the zero travel voltage error value of the accelerator pedal.
Specifically, the zero-stroke voltage error value of the accelerator pedal may be set as an allowable error of the accelerator pedal of the automobile or an allowable error of the accelerator pedal position sensor, and for the error, reference may be made to a specification of the accelerator pedal or a specification of the accelerator pedal position sensor, which is not limited herein.
Specifically, as an alternative embodiment of the present invention, S11 includes:
and taking the minimum voltage value as a zero stroke voltage value of the accelerator pedal.
S22: and updating the pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value.
Specifically, the pre-stored full-stroke voltage value of the accelerator pedal is calculated by adopting the following formula:
wherein, VfIs the full stroke voltage value, Vfs0Is a first full-stroke voltage value, Vfs1Is the second full-stroke voltage value, Vfs2Is a third full-stroke voltage value;
Vfs0、Vfs1and Vfs2Are calculated using the formula: vfsi＝Vfg-VfdjI is 0,1, 2; j is 1,2,3, wherein VfgIs a standard full-stroke voltage value, V, of an accelerator pedalfdjIs the full travel voltage error value of the accelerator pedal.
Specifically, the full-stroke voltage error value of the accelerator pedal may be set as an allowable error of the accelerator pedal of the automobile or an allowable error of the accelerator pedal position sensor, and for the error, reference may be made to a specification of the accelerator pedal or a specification of the accelerator pedal position sensor, which is not limited herein.
Specifically, S22 includes:
and taking the maximum voltage value as the full-stroke voltage value of the accelerator pedal.
S23: and acquiring a real-time voltage value corresponding to the current position of the accelerator pedal.
S24: and calculating the position of the accelerator pedal by using the minimum voltage value, the maximum voltage value and the real-time voltage value.
Specifically, as an alternative embodiment of the present invention, the position of the accelerator pedal is calculated by the following formula:
wherein, PosnPosition of the accelerator pedal, VactIs a real-time voltage value, VminIs a minimum voltage value, VmaxIs the maximum voltage value.
Further, as the service time of the accelerator pedal position sensor increases, an open-circuit fault or a short-circuit fault may occur in the accelerator pedal position sensor, and when the open-circuit fault or the short-circuit fault occurs in the accelerator pedal position sensor, a detection error may occur in the accelerator pedal position sensor. Based on this, as shown in fig. 2(b), the method for calculating the accelerator pedal position of the vehicle further includes:
s25: judging whether the minimum voltage value is larger than an open-circuit fault voltage threshold value of the accelerator pedal position sensor or not; if so, the process proceeds to S21, and if not, the process proceeds to S26.
Specifically, the open-circuit fault voltage threshold may be determined according to the type of the accelerator pedal position sensor, and the size of the open-circuit fault voltage threshold is not limited in the embodiment of the present invention.
S26: and judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value.
The safety threshold value can be a reference range taking zero as a benchmark, namely, the automobile is controlled to stop, and serious traffic accidents are avoided.
S27: and judging whether the maximum voltage value is smaller than the short-circuit fault voltage threshold of the accelerator pedal position sensor, if so, entering S22, and if not, entering S28.
Specifically, the short-circuit fault voltage threshold may be determined according to the type of the accelerator pedal position sensor, and the size of the short-circuit fault voltage threshold is not limited in the embodiment of the present invention.
S28: and judging that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value.
Further, as the service time of the accelerator pedal position sensor increases, the accelerator pedal position sensor may have an open-circuit fault or a short-circuit fault, and when the accelerator pedal position sensor has an open-circuit fault or a short-circuit fault, the safe and stable operation of the automobile may be affected. As shown in fig. 2(c), the method for calculating the accelerator pedal position of the vehicle further includes:
s29: judging whether the real-time voltage value exceeds the short-circuit fault voltage threshold and/or whether the real-time voltage value is lower than the open-circuit fault voltage threshold, if the real-time voltage value exceeds the short-circuit fault voltage threshold and/or the real-time voltage value is lower than the open-circuit fault voltage threshold, entering S30,
s30: judging the fault of an accelerator pedal position sensor and reducing the rotating speed of a motor of the automobile to a safety threshold value; if the real-time voltage value does not exceed the short-circuit fault voltage threshold and the real-time voltage value is not below the open-circuit fault voltage threshold, S24 is entered.
The method for calculating the position of the accelerator pedal of the automobile disclosed by the embodiment 1 of the invention has the following beneficial effects:
in one active period of the accelerator pedal, a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal are obtained. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. And finally, calculating the position of the accelerator pedal by using the updated zero stroke voltage value, the updated full stroke voltage value and the updated real-time voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the accelerator pedal position sensor has a short-circuit fault or an open-circuit fault, the zero stroke voltage value and the full stroke voltage value are not updated according to the wrong minimum voltage value and the wrong maximum voltage value detected by the accelerator pedal position sensor, but the rotating speed of the motor of the automobile is reduced to the safety threshold, so that the calculated position of the accelerator pedal is prevented from having a large error, and meanwhile, the safe and stable operation of the automobile is ensured by reducing the rotating speed of the motor of the automobile to the safety threshold.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the real-time voltage value acquired by the accelerator pedal position sensor exceeds the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, the accelerator pedal position sensor may have a short-circuit fault or an open-circuit fault, and further, the real-time voltage value acquired by the accelerator pedal position sensor may have a detection error.
Example 2
Next, referring to fig. 3, a device for calculating a position of an accelerator pedal of an automobile according to embodiment 3 of the present invention is disclosed, and fig. 3 is a schematic structural diagram of the device for calculating a position of an accelerator pedal of an automobile according to embodiment 3 of the present invention.
As shown in fig. 3, the calculating means of the accelerator pedal position of the automobile includes:
the first obtaining module 30 is configured to, when the time window for updating the voltage value of the accelerator pedal is triggered, obtain a minimum voltage value and a maximum voltage value corresponding to a position of the accelerator pedal in an activity cycle of the accelerator pedal;
a first updating module 31, configured to update a pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value;
a second updating module 32, configured to update a pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
the second obtaining module 33 is configured to obtain a real-time voltage value corresponding to a current position of the accelerator pedal;
and the calculation module 34 is used for calculating the position of the accelerator pedal by using the minimum voltage value, the maximum voltage value and the real-time voltage value.
As an alternative embodiment of the present invention, the method further includes:
the first judgment module is used for judging whether the minimum voltage value is larger than the open-circuit fault voltage threshold of the accelerator pedal position sensor or not, if so, entering the first updating module, and if not, entering the first control module;
the first control module is used for judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
the second judgment module is used for judging whether the maximum voltage value is smaller than the short-circuit fault voltage threshold of the accelerator pedal position sensor, if so, the second updating module is started, and if not, the second control module is started;
and the second control module is used for judging that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value.
The device for calculating the position of the accelerator pedal of the automobile disclosed by the embodiment 2 of the invention has the following beneficial effects:
in one active period of the accelerator pedal, a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal are obtained. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. And finally, calculating the position of the accelerator pedal by using the updated zero stroke voltage value, the updated full stroke voltage value and the updated real-time voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the accelerator pedal position sensor has a short-circuit fault or an open-circuit fault, the zero stroke voltage value and the full stroke voltage value are not updated according to the wrong minimum voltage value and the wrong maximum voltage value detected by the accelerator pedal position sensor, but the rotating speed of the motor of the automobile is reduced to the safety threshold, so that the calculated position of the accelerator pedal is prevented from having a large error, and meanwhile, the safe and stable operation of the automobile is ensured by reducing the rotating speed of the motor of the automobile to the safety threshold.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the real-time voltage value acquired by the accelerator pedal position sensor exceeds the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, the accelerator pedal position sensor may have a short-circuit fault or an open-circuit fault, and further, the real-time voltage value acquired by the accelerator pedal position sensor may have a detection error.
Example 3
Next, a computing device for a position of an accelerator pedal of an automobile disclosed in embodiment 3 of the present invention is described with reference to fig. 4, and fig. 4 is a schematic structural diagram of the computing device for a position of an accelerator pedal of an automobile disclosed in embodiment 3 of the present invention.
The device for calculating the position of the accelerator pedal of the automobile comprises: a memory 40 for storing a computer program;
a processor 41, the steps of the method for calculating the position of the accelerator pedal of the vehicle as mentioned in the above embodiments being implemented when the processor 41 executes a computer program.
Specifically, any unit having a storage function and an arithmetic function may be used for the memory 40 and the processor 41, and the model of the memory 40 and the processor 41 are not particularly limited in the embodiment of the present invention.
The device for calculating the position of the accelerator pedal of the automobile disclosed by the embodiment 3 of the invention has the following beneficial effects:
in one active period of the accelerator pedal, a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal are obtained. The minimum and maximum voltage values during an active cycle represent zero and full travel positions of the accelerator pedal. And updating the pre-stored zero stroke voltage value of the accelerator pedal by using the minimum voltage value, and updating the pre-stored full stroke voltage value of the accelerator pedal by using the maximum voltage value. And finally, calculating the position of the accelerator pedal by using the updated zero stroke voltage value, the updated full stroke voltage value and the updated real-time voltage value. Therefore, by adopting the scheme, aiming at the fact that the zero stroke position and the full stroke position of the accelerator pedal change along with the increase of the service time, the voltage values corresponding to the zero stroke position and the full stroke position of the accelerator pedal are updated in real time, and the accuracy of the position of the accelerator pedal calculated in the mode is high compared with that of the scheme in the prior art.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the accelerator pedal position sensor has a short-circuit fault or an open-circuit fault, the zero stroke voltage value and the full stroke voltage value are not updated according to the wrong minimum voltage value and the wrong maximum voltage value detected by the accelerator pedal position sensor, but the rotating speed of the motor of the automobile is reduced to the safety threshold, so that the calculated position of the accelerator pedal is prevented from having a large error, and meanwhile, the safe and stable operation of the automobile is ensured by reducing the rotating speed of the motor of the automobile to the safety threshold.
By setting the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, when the real-time voltage value acquired by the accelerator pedal position sensor exceeds the short-circuit fault voltage threshold and the open-circuit fault voltage threshold, the accelerator pedal position sensor may have a short-circuit fault or an open-circuit fault, and further, the real-time voltage value acquired by the accelerator pedal position sensor may have a detection error.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method of calculating a position of an accelerator pedal of an automobile, the method comprising:
in an activity period of an accelerator pedal, acquiring a minimum voltage value and a maximum voltage value corresponding to the position of the accelerator pedal;
updating a pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value;
updating a pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
acquiring a real-time voltage value corresponding to the current position of the accelerator pedal;
calculating a position of the accelerator pedal using the minimum voltage value, the maximum voltage value, and the real-time voltage value;
the minimum voltage value, the maximum voltage value and the real-time voltage value are all collected by an accelerator pedal position sensor, and the calculation method further comprises the following steps:
judging whether the minimum voltage value is larger than an open-circuit fault voltage threshold value of the accelerator pedal position sensor or not;
if yes, the step of updating the pre-stored zero travel voltage value of the accelerator pedal based on the minimum voltage value is carried out;
if not, judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
judging whether the maximum voltage value is smaller than a short-circuit fault voltage threshold value of the accelerator pedal position sensor or not;
if so, entering the step of updating the pre-stored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
if not, determining that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of the motor of the automobile to the safety threshold value.
2. The method for calculating the accelerator pedal position of the automobile according to claim 1, wherein before the obtaining the real-time voltage value corresponding to the current position of the accelerator pedal, the method further comprises:
judging whether the real-time voltage value exceeds the short-circuit fault voltage threshold value and/or whether the real-time voltage value is lower than the open-circuit fault voltage threshold value;
if the real-time voltage value exceeds the short-circuit fault voltage threshold value and/or the real-time voltage value is lower than the open-circuit fault voltage threshold value, judging that the accelerator pedal position sensor has a fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
and if the real-time voltage value does not exceed the short-circuit fault voltage threshold and the real-time voltage value is not lower than the open-circuit fault voltage threshold, the step of calculating the position of the accelerator pedal by using the minimum voltage value, the maximum voltage value and the real-time voltage value is carried out.
3. The method for calculating the accelerator pedal position of an automobile according to claim 1, wherein the pre-stored zero stroke voltage value of the accelerator pedal is calculated by using the following formula:
wherein, the VzFor said zero stroke voltage value, said Vzs0Is the first zero stroke voltage value, said Vzs1Is the second zero stroke voltage value, said Vzs2A third zero travel voltage value;
the V iszs2The Vzs1And said Vzs0Are calculated using the formula: vzsi＝Vzg+VzdjI is 0,1, 2; j is 1,2,3, wherein V iszgIs the standard zero stroke voltage value of the accelerator pedal, VzdjIs the zero stroke voltage error value of the accelerator pedal;
the pre-stored full-stroke voltage value of the accelerator pedal is calculated by adopting the following formula:
wherein, the VfIs the full stroke voltage valueV isfs0Is a first full stroke voltage value, said Vfs1At a second full stroke voltage value, said Vfs2Is a third full-stroke voltage value;
the V isfs0The Vfs1And said Vfs2Are calculated using the formula: vfsi＝Vfg-VfdjI is 0,1, 2; j is 1,2,3, wherein V isfgIs the standard full-stroke voltage value of the accelerator pedal, VfdjAnd the error value of the full-stroke voltage of the accelerator pedal is obtained.
4. The method of calculating a position of an accelerator pedal of an automobile according to claim 3, wherein the updating of the pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value comprises:
taking the minimum voltage value as a zero stroke voltage value of the accelerator pedal;
the updating of the pre-stored full stroke voltage value of the accelerator pedal based on the maximum voltage value comprises:
and taking the maximum voltage value as a full-stroke voltage value of the accelerator pedal.
5. The method of calculating the accelerator pedal position of an automobile according to claim 1, 3 or 4, wherein the position of the accelerator pedal is calculated using the following equation:
wherein, the PosnIs the position of the accelerator pedal, the VactFor said real-time voltage value, said VminFor the minimum voltage value, the VmaxIs the maximum voltage value.
6. A computing device for accelerator pedal position of an automobile, the computing device comprising:
the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring a minimum voltage value and a maximum voltage value corresponding to the position of an accelerator pedal in one activity period of the accelerator pedal;
the first updating module is used for updating a pre-stored zero stroke voltage value of the accelerator pedal based on the minimum voltage value;
the second updating module is used for updating a prestored full-stroke voltage value of the accelerator pedal based on the maximum voltage value;
the second acquisition module is used for acquiring a real-time voltage value corresponding to the current position of the accelerator pedal;
the calculating module is used for calculating the position of the accelerator pedal by utilizing the minimum voltage value, the maximum voltage value and the real-time voltage value;
the first judgment module is used for judging whether the minimum voltage value is larger than an open-circuit fault voltage threshold of the accelerator pedal position sensor or not, if so, the first updating module is started, and if not, the first control module is started;
the first control module is used for judging that the accelerator pedal position sensor has an open-circuit fault and reducing the rotating speed of a motor of the automobile to a safety threshold value;
the second judgment module is used for judging whether the maximum voltage value is smaller than the short-circuit fault voltage threshold of the accelerator pedal position sensor, if so, the second updating module is started, and if not, the second control module is started;
and the second control module is used for judging that the accelerator pedal position sensor has a short-circuit fault and reducing the rotating speed of the motor of the automobile to the safety threshold value.
7. An automotive accelerator pedal position calculating device, comprising:
a memory for storing a computer program;
a processor implementing the steps of the method of calculating the position of the accelerator pedal of a vehicle according to any one of claims 1 to 5 when said computer program is executed.
8. An automobile, comprising: the system comprises an accelerator pedal, an accelerator pedal position sensor and a whole vehicle controller, wherein the accelerator pedal position sensor is arranged at the accelerator pedal;
the vehicle control unit is connected with the accelerator pedal position sensor, and a computer program is stored in the vehicle control unit, and when being executed by a processor, the computer program realizes the steps of the method for calculating the position of the accelerator pedal of the automobile according to any one of claims 1 to 5.
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| CN112677989B (en) * | 2021-01-12 | 2022-04-01 | 天津易众腾动力技术有限公司 | New energy automobile pedal position sensor service life monitoring method |
| CN113063605A (en) * | 2021-02-08 | 2021-07-02 | 云度新能源汽车股份有限公司 | Zero calibration method for electronic throttle signal |
| CN113482780A (en) * | 2021-07-02 | 2021-10-08 | 苏州臻迪智能科技有限公司 | Throttle control method and device, electronic equipment and storage medium |
| CN114506211B (en) * | 2022-01-28 | 2023-05-23 | 重庆长安新能源汽车科技有限公司 | Zero-opening self-learning method and device for accelerator pedal and automobile |
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