CN113147388B - Vehicle accelerator pedal position analysis method and system - Google Patents
Vehicle accelerator pedal position analysis method and system Download PDFInfo
- Publication number
- CN113147388B CN113147388B CN202110512701.3A CN202110512701A CN113147388B CN 113147388 B CN113147388 B CN 113147388B CN 202110512701 A CN202110512701 A CN 202110512701A CN 113147388 B CN113147388 B CN 113147388B
- Authority
- CN
- China
- Prior art keywords
- pedal
- opening
- value
- learning value
- learning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004458 analytical method Methods 0.000 title claims description 10
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000005070 sampling Methods 0.000 claims description 52
- 238000012937 correction Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 5
- 230000007257 malfunction Effects 0.000 claims 3
- 238000004590 computer program Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 12
- 238000003860 storage Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- 238000004422 calculation algorithm Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 101100137463 Bacillus subtilis (strain 168) ppsA gene Proteins 0.000 description 1
- 101100464927 Bacillus subtilis (strain 168) ppsB gene Proteins 0.000 description 1
- 101100342406 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PRS1 gene Proteins 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 101150056693 pps1 gene Proteins 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B60K2026/026—Adjusting of accelerator pedal positions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method and a system for analyzing the position of an accelerator pedal of a vehicle, wherein the method comprises the following steps: collecting pedal position voltage information and a reference voltage value; obtaining the original pedal proportional opening according to the pedal position voltage information and the reference voltage value; acquiring a learning value of the pedal opening; and acquiring the percentage opening of the accelerator pedal according to the original pedal proportion opening and the pedal opening learning value. The invention corrects the collected pedal position voltage information by collecting the reference voltage value in real time, thereby reducing the influence caused by signal fluctuation.
Description
Technical Field
The invention relates to the field of automobile control, in particular to a method and a system for analyzing the position of an accelerator pedal of a vehicle.
Background
For a traditional automobile, an Electronic Control Unit (ECU) collects analog 0-5V voltage signals from an accelerator pedal, and then the ECU calculates a corresponding output driver torque value through a certain algorithm and finally calculates a final output torque of a flywheel end through a certain algorithm. Therefore, the accuracy of the position calculation of the accelerator pedal directly influences the torque control strategy, and the dynamic property and the comfort of the whole vehicle driving are directly influenced.
However, the damage or interference of a 5V reference voltage power supply line on the ECU can cause inaccuracy of a pedal voltage signal read by the ECU, the conventional minimum learning can only solve the problem of overlarge idle stroke, but cannot solve the phenomenon that the vehicle cannot return to the idle working condition due to aging of parts and other interference, and a certain position sensor has a fault or other faults, so that if no degradation measure is taken, the dynamic property of the vehicle and even the safety of the vehicle are seriously affected.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned shortcomings in the prior art, and provides a method and a system for analyzing a position of an accelerator pedal of a vehicle, which corrects the collected pedal position voltage information by collecting reference voltage values in real time, so as to reduce the influence caused by signal fluctuation.
In a first aspect, a method for analyzing a position of an accelerator pedal of a vehicle is provided, comprising the steps of:
collecting pedal position voltage information and a reference voltage value;
obtaining the original pedal proportional opening according to the pedal position voltage information and the reference voltage value;
acquiring a learning value of the pedal opening;
and acquiring the percentage opening of the accelerator pedal according to the original proportional opening of the pedal and the learned value of the pedal opening.
According to the first aspect, in a first possible implementation manner of the first aspect, after the step of "obtaining an original pedal proportional opening degree according to the pedal position voltage information and the reference voltage value", the method includes the following steps:
and acquiring the state of an ignition key, the vehicle speed value and the previous pedal opening learning value, performing pedal position self-learning to obtain the current pedal opening learning value, and recording and storing the current pedal opening learning value.
According to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the step of "obtaining the state of the ignition key, the vehicle speed value and the previous learning value of the pedal opening degree, performing pedal position self-learning to obtain the current learning value of the pedal opening degree, and recording and storing the current learning value of the pedal opening degree" includes the following steps:
acquiring an ignition key state and a last pedal opening learning value;
when the vehicle is detected to be powered on according to the state of the ignition key and the original pedal proportional opening is smaller than or equal to the previous pedal opening learning value, judging that the learning state is power-on learning, and acquiring the previous pedal opening learning value to perform downward learning;
and acquiring a downward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the downward learning value, and recording and storing the current pedal opening learning value.
According to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the step of obtaining the ignition key state, the vehicle speed value, and the previous pedal opening learning value, performing pedal position self-learning to obtain a current pedal opening learning value, and recording and storing the current pedal opening learning value includes the following steps:
acquiring an ignition key state and a vehicle speed value;
when the power-off of the vehicle is detected according to the state of the ignition key and the vehicle speed value is larger than or equal to the preset vehicle speed value in the driving cycle, judging that the learning state is power-off learning, and acquiring the previous pedal opening learning value for upward learning;
and acquiring an upward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the upward learning value, and recording and storing the current pedal opening learning value.
In a fourth possible implementation manner of the first aspect, the step of obtaining a percentage accelerator pedal opening degree according to the original pedal proportional opening degree and the pedal opening degree learning value includes:
selecting a maximum pedal opening learning value and a minimum pedal opening learning value from the pedal opening learning values;
and acquiring the percentage opening of the accelerator pedal according to the original pedal proportional opening, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening.
In a fifth possible implementation manner of the first aspect, after the step of obtaining the accelerator pedal percentage opening degree according to the original pedal proportional opening degree and the pedal opening degree learning value, the method comprises the following steps:
acquiring a standard reference voltage value, and acquiring a correction voltage value according to the pedal position voltage information, the reference voltage value and the standard reference voltage value;
when the corrected voltage value is greater than or equal to a preset voltage value, judging a sampling fault;
and when the duration of the sampling fault is longer than or equal to the preset duration, judging that the sensor has a fault.
According to a fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, after the step of "determining that the sensor has failed when the duration of the sampling failure is greater than or equal to the preset duration", the method includes the following steps:
acquiring percentage opening degrees of an accelerator pedal of a plurality of sensors;
if the sensor judges that the sampling fault exists, acquiring the final percentage opening degree of the accelerator pedal according to the percentage opening degree of the accelerator pedal corresponding to the sensor without the sampling fault;
and if all the sensors are judged to be in sampling failure, starting a limp home mode.
According to a fifth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, after the step of "determining that the sensor has failed when the duration of the sampling failure is greater than or equal to the preset duration", the method includes the following steps:
acquiring percentage opening degrees of an accelerator pedal of a plurality of sensors;
if the sensor is judged to be in fault, acquiring the final percentage opening of the accelerator pedal according to the percentage opening of the accelerator pedal corresponding to the sensor which is not in fault and is not in sampling fault;
and if all the sensors are judged to be in sensor failure, controlling the opening degree of the accelerator pedal to be 0 and starting the limp-home mode.
According to a fifth possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, after the step of "determining that the sensor has failed when the duration of the sampling failure is greater than or equal to the preset duration", the method includes the following steps:
acquiring output characteristic curves of a plurality of sensors, and acquiring corresponding relations among the sensors according to the output characteristic curves;
acquiring correction voltage values of a plurality of sensors;
and if the corrected voltage value does not accord with the corresponding relation, judging that the corresponding sensor sampling fails.
In a second aspect, there is provided a vehicle accelerator pedal position analysis system comprising:
the data acquisition module is used for acquiring pedal position voltage information and a reference voltage value;
the opening obtaining module is in communication connection with the data acquisition module and is used for obtaining the proportional opening of the original pedal according to the pedal position voltage information and the reference voltage value;
a learning value acquisition module for acquiring a learning value of the pedal opening;
and the opening analysis module is in communication connection with the opening acquisition module and the learning value acquisition module and is used for acquiring the percentage opening of the accelerator pedal according to the original pedal proportion opening and the pedal opening learning value.
Compared with the prior art, the method and the device have the advantages that the collected pedal position voltage information is corrected by collecting the reference voltage value in real time, so that the influence caused by signal fluctuation is reduced.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a method for analyzing a position of an accelerator pedal of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating a method for analyzing a position of an accelerator pedal of a vehicle according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a sensor output characteristic provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a vehicle accelerator pedal position analysis system according to an embodiment of the present invention.
Reference numbers:
100. a vehicle accelerator pedal position analysis system; 110. a data acquisition module; 120. an opening degree obtaining module; 130. a learning value acquisition module; 140. and an opening analysis module.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the specific embodiments, it will be understood that they are not intended to limit the invention to the embodiments described. On the contrary, it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described herein may be implemented by any functional block or functional arrangement, and that any functional block or functional arrangement may be implemented as a physical entity or a logical entity, or a combination of both.
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Note that: the example to be described next is only a specific example, and does not limit the embodiments of the present invention by the following specific steps, values, conditions, data, order, and the like. Those skilled in the art can, upon reading this specification, utilize the concepts of the present invention to construct more embodiments than those specifically described herein.
Referring to fig. 1, an embodiment of the present invention provides a method for analyzing a position of an accelerator pedal of a vehicle, including the steps of:
s100, collecting pedal position voltage information and a reference voltage value;
s200, obtaining the proportional opening of an original pedal according to the pedal position voltage information and the reference voltage value;
s300, acquiring a learning value of the pedal opening;
s400, acquiring percentage opening of an accelerator pedal according to the original pedal proportional opening and the pedal opening learning value.
Specifically, in this embodiment, the ECU collects a voltage signal analog quantity of 0 to 5V from the accelerator pedal, then performs 5V reference voltage correction on the voltage signal, then performs learning value correction and conversion from a proportional position to a percentage position, and finally obtains a final accelerator pedal position through diagnostic weighting and functional safety degradation.
Therefore, pedal position voltage information and a reference voltage value are collected, wherein the standard reference voltage value is a value determined according to circuit characteristics, and is generally set to 5V, but the reference voltage value is collected at the same time every sampling because the reference voltage may fluctuate due to fluctuation or other factors in the circuit. And acquiring an original pedal proportional opening according to the pedal position voltage information and the reference voltage value, wherein the original pedal proportional opening is the ratio of the pedal position voltage information to the reference voltage value.
And acquiring a learning value of the pedal opening, wherein the learning value of the pedal opening is all recorded and stored learning values of the pedal opening, and when the position of an ignition key reaches an ON gear for the first time, electrifying the learning. And when the position of the ignition key reaches an OFF gear for the first time and the condition that the vehicle speed is greater than a calibrated threshold value occurs in the current driving cycle, performing power-OFF learning. No matter power-on learning or power-off learning is carried out once, and the learned pedal opening learning value is recorded so as to be called when the pedal opening is calculated.
And acquiring the percentage opening of the accelerator pedal according to the original pedal proportion opening and the learned value of the pedal opening, wherein the range values of the corresponding voltages are different and the converted percentages are different because the original pedal proportion opening and the learned value of the pedal opening are voltage ratio values. Therefore, a proportional value is obtained from the original pedal proportional opening degree and the pedal opening degree learning value, and then the proportional value is converted into an accelerator pedal percentage opening degree. For example, when the proportional value is 0.3, if the corresponding voltage range value is 0-1, the corresponding accelerator pedal percentage opening is 30%.
The damage or the interference of a 5V reference voltage power supply line on the ECU can cause the inaccuracy of an initial pedal voltage signal read by the ECU, the traditional minimum value learning can only solve the problem of overlarge idle stroke, but cannot solve the phenomenon that the vehicle cannot return to the idle working condition caused by part aging, other interference and the like. The invention corrects the collected pedal position voltage information by collecting the reference voltage value in real time, thereby reducing the influence caused by signal fluctuation.
Alternatively, as shown in fig. 2, in another embodiment of the present invention, after the step of "S200 obtaining an original pedal proportional opening degree according to the pedal position voltage information and the reference voltage value", the method includes the following steps:
s250, acquiring the state of an ignition key, the vehicle speed value and the previous pedal opening learning value, performing pedal position self-learning to obtain a current pedal opening learning value, and recording and storing the current pedal opening learning value.
Specifically, in this embodiment, the state of the ignition key and the vehicle speed value are obtained, and the learning state is determined according to the state of the ignition key and the vehicle speed value, where the learning state includes power-on learning and power-off learning. And judging the learning direction according to the learning state, wherein the learning direction comprises upward learning and downward learning. When the learning state is power-on learning, only downward learning is performed, and when the learning state is power-off learning, only upward learning is performed. The learning is only performed once no matter the power-on learning or the power-off learning. And self-learning according to the previous pedal opening learning value to obtain a current pedal opening learning value, and recording and storing the current pedal opening learning value. When self-learning is carried out for the first time, the learning value of the opening degree of the previous pedal is a set calibration value which depends on the idle stroke value of the accelerator pedal.
Optionally, in another embodiment of the present invention, the step of S250 obtaining the state of the ignition key, the vehicle speed value and the last learning value of the pedal opening, performing pedal position self-learning to obtain the current learning value of the pedal opening, and recording and storing the current learning value of the pedal opening includes the following steps:
s251, acquiring the state of an ignition key and a previous pedal opening learning value;
s252, when the vehicle is detected to be powered on according to the state of the ignition key and the original pedal proportional opening is smaller than or equal to the previous pedal opening learning value, judging that the learning state is power-on learning, and acquiring the previous pedal opening learning value for downward learning;
and S253, acquiring a downward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the downward learning value, and recording and storing the current pedal opening learning value.
Specifically, in this embodiment, when the ignition key state reaches the ON position for the first time and the original pedal proportional opening degree is less than or equal to the last pedal opening degree learning value, it is determined that the learning state is the power-ON learning, and the last pedal opening degree learning value is obtained for the downward learning. And acquiring a downward learning value, acquiring a current pedal opening learning value according to the previous pedal opening learning value and the downward learning value, and recording and storing the current pedal opening learning value. Wherein the downward learning value is a calibration value.
Optionally, in another embodiment of the present invention, the step of S250 obtaining the state of the ignition key, the vehicle speed value and the last learning value of the pedal opening, performing pedal position self-learning to obtain the current learning value of the pedal opening, and recording and storing the current learning value of the pedal opening includes the following steps:
s255, acquiring an ignition key state and a vehicle speed value;
s256, when the power-off of the vehicle is detected according to the state of the ignition key and the vehicle speed value is larger than or equal to a preset vehicle speed value in the driving cycle, judging that the learning state is power-off learning, and acquiring the previous pedal opening learning value for upward learning;
s257 acquires an upward learning value, acquires the current pedal opening learning value according to the previous pedal opening learning value and the upward learning value, and records and stores the current pedal opening learning value.
Specifically, in this embodiment, when the ignition key position reaches the OFF-range for the first time and the vehicle speed value is greater than or equal to the preset vehicle speed value in the current driving cycle, it is determined that the learning state is the power-OFF learning, and the last pedal opening learning value is obtained for the upward learning. And acquiring an upward learning value, acquiring a current pedal opening learning value according to the previous pedal opening learning value and the upward learning value, and recording and storing the current pedal opening learning value. Wherein, the upward learning value is a calibration value.
Alternatively, in another embodiment of the present invention, the step of "S400 obtaining a percentage opening degree of an accelerator pedal according to the original pedal proportional opening degree and the pedal opening degree learning value" includes the steps of:
s410, selecting a maximum learning value and a minimum learning value of the pedal opening from the learning values of the pedal opening;
s420, acquiring the percentage opening of the accelerator pedal according to the original pedal proportional opening, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening.
Specifically, in this embodiment, the accelerator pedal percentage opening is obtained according to the original pedal proportional opening and the learned value of the pedal opening, wherein the original pedal proportional opening and the learned value of the pedal opening are voltage ratios, the corresponding voltage range values are different, and the converted percentages are different. Therefore, a proportional value is obtained from the original pedal proportional opening and the pedal opening learning value, and then the proportional value is converted into an accelerator pedal percentage opening.
Since the learning values of the pedal opening degree of each self-learning are recorded and stored, the learning maximum value and the learning minimum value of the pedal opening degree are selected from the learning values of the pedal opening degree. Determining a range value of the voltage according to the maximum learning value and the minimum learning value of the pedal opening,
obtaining the percentage opening of the accelerator pedal according to the original proportional opening of the pedal, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening, wherein the specific calculation mode is as follows: accelerator pedal percentage opening =100 max ((original pedal ratio opening-pedal opening learning minimum)/(pedal opening learning maximum-pedal opening learning minimum)), wherein when the original pedal ratio opening is smaller than the pedal opening learning minimum, the accelerator pedal percentage opening is limited to 0, enhancing the robustness of the algorithm.
Alternatively, in another embodiment of the present invention, after the step of "S400 obtaining percentage opening of accelerator pedal according to the original pedal proportional opening and the pedal opening learning value", the method includes the following steps:
s500, acquiring a standard reference voltage value, and acquiring a correction voltage value according to the pedal position voltage information, the reference voltage value and the standard reference voltage value;
s550, when the corrected voltage value is larger than or equal to a preset voltage value, judging that a sampling fault occurs;
s600, judging that the sensor has a fault when the duration of the sampling fault is longer than or equal to the preset duration.
Specifically, in this embodiment, a standard reference voltage value is obtained, and the standard reference voltage value is a value determined according to circuit characteristics and is generally set to 5V. Correcting the pedal position voltage information based on the standard reference voltage value, and acquiring a corrected voltage value according to the pedal position voltage information, the reference voltage value and the standard reference voltage value, wherein the specific calculation mode is as follows: correction voltage value = (pedal position voltage information/reference voltage value) = standard reference voltage value. If a certain corrected voltage value is larger than or equal to a preset voltage value, the corresponding sensor is judged to be a sampling fault, and the pedal position voltage information acquired at this time is unavailable. And if the duration of the sampling fault is more than or equal to the preset time length, namely the sampling fault is detected in a long time, judging that the sensor has a fault.
Optionally, in another embodiment of the present invention, after the step of "determining that the sensor is faulty when the duration of the sampling fault is greater than or equal to the preset duration", the method includes the following steps:
s650, acquiring percentage opening degrees of accelerator pedals of a plurality of sensors;
s700, if the sensor is judged to be in sampling failure, acquiring the final percentage opening degree of the accelerator pedal according to the percentage opening degree of the accelerator pedal corresponding to the sensor in non-sampling failure;
and S750, if all the sensors judge that the sampling is failed, starting a limp home mode.
Specifically, in the present embodiment, the accelerator pedal percentage opening of a plurality of sensors is obtained, and the accelerator pedal percentage opening of each sensor is obtained based on the collected pedal position voltage information and the reference voltage value, and the specific process is as described in the above embodiments. However, the invention does not specifically limit the number of the sensors, the cost is lower when a single sensor is selected, and the judgment logic is simpler. And a plurality of sensors are selected to carry out judgment weighting, so that the influence on the driving safety of the automobile caused by the incapability of working when the sensors have faults can be avoided.
Therefore, if the sensors in the plurality of sensors are determined to be sampling faults, the final accelerator pedal percentage opening degree is obtained according to the accelerator pedal percentage opening degree corresponding to the sensor without sampling faults. The maximum value or the minimum value can be selected as the final percentage opening degree of the accelerator pedal, and the final percentage opening degree of the accelerator pedal can be obtained by weighting the percentage opening degrees of the accelerator pedal corresponding to all the sensors with non-sampling faults comprehensively.
If all sensors are judged to be sampling failure, data collected by all sensors are unavailable, and therefore the limp home mode is started. However, the sensor may sample the fault only once or a few times, so that the sensor continuously collects data subsequently, if the sampling fault is not judged any more, the limp-home mode is exited, and the accelerator pedal percentage opening corresponding to the sensor without the sampling fault is selected to obtain the final accelerator pedal percentage opening.
Optionally, in another embodiment of the present invention, after the step of "determining that the sensor is faulty when the duration of the sampling fault is greater than or equal to the preset duration", the method includes the following steps:
s650, acquiring percentage opening of accelerator pedals of a plurality of sensors;
s800, if the sensor is judged to be in fault, acquiring the final percentage opening of the accelerator pedal according to the percentage opening of the accelerator pedal corresponding to the sensor which is not in fault and is not in sampling fault;
if all the sensors are judged to be in sensor failure, the opening degree of the accelerator pedal is controlled to be 0, and the limp home mode is started.
Specifically, in this embodiment, the accelerator pedal percentage opening of a plurality of sensors is obtained, and the accelerator pedal percentage opening of each sensor is obtained based on the collected pedal position voltage information and the reference voltage value, and the specific process is as described in the above embodiments. However, the invention does not specifically limit the number of the sensors, the cost is lower when a single sensor is selected, and the judgment logic is simpler. A plurality of sensors are selected to be judged and weighted mutually, so that the influence on the driving safety of the automobile caused by incapability of working when the sensors have faults can be avoided.
Therefore, if there is a sensor determined to be a sensor failure among the plurality of sensors, the final accelerator pedal percentage opening is obtained from the accelerator pedal percentage opening corresponding to the sensor that is not a sensor failure and is not a sampling failure. The maximum value or the minimum value can be selected as the final percentage opening degree of the accelerator pedal, and the final percentage opening degree of the accelerator pedal can also be obtained by comprehensively weighting the percentage opening degrees of the accelerator pedal corresponding to all the sensors with non-sampling faults.
And if all the sensors are judged to be in fault, controlling the opening of the accelerator pedal to be 0, exiting the cruise and starting the limp mode. Meanwhile, all the sensors are judged to be in sensor failure, and data do not need to be collected continuously through the sensors.
The invention designs a diagnosis algorithm, a weighting coefficient and functional safety degradation, can obtain proper accelerator pedal opening even if a sensor fails, and ensures the dynamic property, driving property and safety of a vehicle.
Optionally, in another embodiment of the present invention, after the step of "determining that the sensor is faulty when the duration of the sampling fault is greater than or equal to the preset duration", the method includes the following steps:
s900, acquiring output characteristic curves of a plurality of sensors, and acquiring corresponding relations among the sensors according to the output characteristic curves;
s910, acquiring corrected voltage values of a plurality of sensors;
and S920, if the corrected voltage value does not accord with the corresponding relation, judging that the corresponding sensor has sampling faults.
Specifically, in the present embodiment, the output characteristic curves of the plurality of sensors are acquired, and the correspondence relationship between the sensors is acquired based on the output characteristic curves, and as shown in fig. 3, the horizontal axis represents the accelerator opening degree, and the vertical axis represents the output voltage value of the sensor, so that the correspondence relationship between the output voltage values of the sensors can be acquired based on the characteristic curves, and the output voltage of the sensor one PPS1 is 1/2 of the output voltage of the accelerator position sensor two PPS2 for the same accelerator opening degree in the two sensors shown in fig. 3.
Whether the opening degree of the same accelerator pedal is indicated by each sensor is judged based on the corresponding relation between the sensors, and the specific mode is as follows: and acquiring corrected voltage values of a plurality of sensors, analyzing the relationship among the corrected voltage values of the sensors, and if the corrected voltage values do not accord with the corresponding relationship, judging that the corresponding sensors have sampling faults. However, since it is impossible to determine which sensor is failed, all of the sensors concerned are determined as sampling failures. Therefore, the determination may be performed in combination with the contents described in the above embodiments, and when it is determined that one sensor has a sampling failure or a sensor has a failure, the determination of the correspondence relationship with other sensors is not performed, so that the data processing amount is reduced.
As shown in fig. 4, the present invention provides a vehicle accelerator pedal position analyzing system, comprising:
the data acquisition module 110 is used for acquiring pedal position voltage information and reference voltage values;
the opening obtaining module 120 is in communication connection with the data acquisition module 110, and is configured to obtain an original pedal proportional opening according to the pedal position voltage information and the reference voltage value;
a learning value acquisition module 130 for acquiring a learning value of the pedal opening;
and an opening analyzing module 140, communicatively connected to the opening obtaining module 120 and the learned value obtaining module 130, for obtaining a percentage opening of the accelerator pedal according to the original pedal proportional opening and the pedal opening learned value. The method specifically comprises the following steps: selecting a maximum pedal opening learning value and a minimum pedal opening learning value from the pedal opening learning values; and acquiring the percentage opening of the accelerator pedal according to the original proportional opening of the pedal, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening.
The learning value obtaining module 130 is further configured to obtain an ignition key state, a vehicle speed value, and a previous pedal opening learning value, perform pedal position self-learning to obtain a current pedal opening learning value, and record and store the current pedal opening learning value. The method specifically comprises the following steps: acquiring an ignition key state and a previous pedal opening learning value; when the vehicle is detected to be powered on according to the state of the ignition key and the original pedal proportional opening is smaller than or equal to the previous pedal opening learning value, judging that the learning state is power-on learning, and acquiring the previous pedal opening learning value to learn downwards; and acquiring a downward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the downward learning value, and recording and storing the current pedal opening learning value. Acquiring an ignition key state and a vehicle speed value; when the power-off of the vehicle is detected according to the state of the ignition key and the vehicle speed value is larger than or equal to the preset vehicle speed value in the driving cycle, judging that the learning state is power-off learning, and acquiring the previous pedal opening learning value for upward learning; and acquiring an upward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the upward learning value, and recording and storing the current pedal opening learning value.
The opening analysis module 140 is further configured to obtain a standard reference voltage value, and obtain a correction voltage value according to the pedal position voltage information, the reference voltage value, and the standard reference voltage value; when the corrected voltage value is larger than or equal to a preset voltage value, judging that sampling faults occur; and when the duration of the sampling fault is longer than or equal to the preset duration, judging that the sensor has a fault. Acquiring percentage opening degrees of an accelerator pedal of a plurality of sensors; if the sensor is judged to be in sampling failure, acquiring the final percentage opening of the accelerator pedal according to the percentage opening of the accelerator pedal corresponding to the sensor which is not in sampling failure; and if all the sensors are judged to be in sampling failure, starting a limp home mode. Acquiring percentage opening of an accelerator pedal of a plurality of sensors; if the sensor is judged to be faulty, acquiring the final percentage opening of the accelerator pedal according to the percentage opening of the accelerator pedal corresponding to the sensor which is not faulty and is not faulty in sampling; and if all the sensors are judged to be in failure, controlling the opening of the accelerator pedal to be 0 and starting the limp mode. Acquiring output characteristic curves of a plurality of sensors, and acquiring corresponding relations among the sensors according to the output characteristic curves; acquiring correction voltage values of a plurality of sensors; and if the corrected voltage value does not accord with the corresponding relation, judging that the corresponding sensor sampling fails.
Specifically, the work flows of the modules are already described in detail in the corresponding method embodiments, and therefore, the descriptions thereof are omitted.
Based on the same inventive concept, the embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements all or part of the method steps of the above method.
The present invention realizes all or part of the processes of the above methods, and can also be implemented by a computer program instructing related hardware, where the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
Based on the same inventive concept, an embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the memory stores a computer program running on the processor, and the processor executes the computer program to implement all or part of the method steps in the method.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the computer device and the various interfaces and lines connecting the various parts of the overall computer device.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the computer device by executing or executing the computer programs and/or modules stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (e.g., a sound playing function, an image playing function, etc.); the storage data area may store data (e.g., audio data, video data, etc.) created according to the use of the cellular phone. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, server, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), servers, and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A vehicle accelerator pedal position analyzing method, characterized by comprising the steps of:
collecting pedal position voltage information and a reference voltage value;
obtaining the original pedal proportional opening according to the pedal position voltage information and the reference voltage value;
acquiring an ignition key state, a vehicle speed value and a last pedal opening learning value, performing pedal position self-learning to obtain a current pedal opening learning value, recording and storing the current pedal opening learning value, and acquiring a pedal opening learning value;
acquiring percentage opening of an accelerator pedal according to the original proportional opening of the pedal and the learning value of the pedal opening;
the step of obtaining the percentage opening of the accelerator pedal according to the original pedal proportion opening and the pedal opening learning value comprises the following steps of:
selecting a maximum pedal opening learning value and a minimum pedal opening learning value from the pedal opening learning values;
and acquiring the percentage opening of the accelerator pedal according to the original pedal proportional opening, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening.
2. The method for analyzing a position of an accelerator pedal of a vehicle according to claim 1, wherein the step of obtaining an ignition key state, a vehicle speed value and a last learning value of a pedal opening degree, performing a self-learning of a pedal position to obtain a current learning value of a pedal opening degree, and recording and storing the current learning value of the pedal opening degree comprises the steps of:
acquiring an ignition key state and a last pedal opening learning value;
when the vehicle is detected to be powered on according to the state of the ignition key and the original pedal proportional opening is smaller than or equal to the previous pedal opening learning value, judging that the learning state is power-on learning, and acquiring the previous pedal opening learning value to learn downwards;
and acquiring a downward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the downward learning value, and recording and storing the current pedal opening learning value.
3. The method for analyzing a position of an accelerator pedal of a vehicle according to claim 1, wherein the step of obtaining an ignition key state, a vehicle speed value and a last pedal opening learning value, performing pedal position self-learning to obtain a current pedal opening learning value, and recording and storing the current pedal opening learning value comprises the steps of:
acquiring an ignition key state and a vehicle speed value;
when the power-off of the vehicle is detected according to the state of the ignition key and the vehicle speed value is larger than or equal to the preset vehicle speed value in the driving cycle, judging that the learning state is power-off learning, and acquiring the previous pedal opening learning value for upward learning;
and acquiring an upward learning value, acquiring the current pedal opening learning value according to the previous pedal opening learning value and the upward learning value, and recording and storing the current pedal opening learning value.
4. The vehicle accelerator pedal position analyzing method according to claim 1, wherein after the step of "obtaining a percent accelerator pedal opening degree from the original proportional pedal opening degree and the learned value of pedal opening degree", the method comprises the steps of:
acquiring a standard reference voltage value, and acquiring a correction voltage value according to the pedal position voltage information, the reference voltage value and the standard reference voltage value;
when the corrected voltage value is larger than or equal to a preset voltage value, judging that sampling faults occur;
and when the duration of the sampling fault is longer than or equal to the preset duration, judging that the sensor has a fault.
5. The vehicle accelerator pedal position analyzing method according to claim 4, wherein the step of "determining that the sensor is malfunctioning when the duration of the sampling malfunction is equal to or longer than a preset duration" is followed by the step of:
acquiring percentage opening degrees of an accelerator pedal of a plurality of sensors;
if the sensor judges that the sampling fault exists, acquiring the final percentage opening degree of the accelerator pedal according to the percentage opening degree of the accelerator pedal corresponding to the sensor without the sampling fault;
and if all the sensors are judged to be in sampling failure, starting a limp home mode.
6. The vehicle accelerator pedal position analyzing method according to claim 4, wherein the step of "determining that the sensor is malfunctioning when the duration of the sampling malfunction is equal to or longer than a preset duration" is followed by the step of:
acquiring percentage opening degrees of an accelerator pedal of a plurality of sensors;
if the sensor is judged to be in fault, acquiring the final percentage opening of the accelerator pedal according to the percentage opening of the accelerator pedal corresponding to the sensor which is not in fault and is not in sampling fault;
and if all the sensors are judged to be in sensor failure, controlling the opening degree of the accelerator pedal to be 0 and starting the limp-home mode.
7. The vehicle accelerator pedal position analyzing method according to claim 4, wherein the step of "determining that the sensor is malfunctioning when the duration of the sampling malfunction is equal to or longer than a preset duration" is followed by the step of:
acquiring output characteristic curves of a plurality of sensors, and acquiring corresponding relations among the sensors according to the output characteristic curves;
acquiring correction voltage values of a plurality of sensors;
and if the corrected voltage value does not accord with the corresponding relation, judging that the corresponding sensor sampling fails.
8. A vehicle accelerator pedal position analysis system, comprising:
the data acquisition module is used for acquiring pedal position voltage information and a reference voltage value;
the opening obtaining module is in communication connection with the data acquisition module and is used for obtaining the proportional opening of the original pedal according to the pedal position voltage information and the reference voltage value;
the learning value acquisition module is used for acquiring the state of an ignition key, the vehicle speed value and the previous pedal opening learning value, performing pedal position self-learning to obtain a current pedal opening learning value, recording and storing the current pedal opening learning value and acquiring the pedal opening learning value;
the opening analysis module is in communication connection with the opening acquisition module and the learning value acquisition module and is used for acquiring the percentage opening of the accelerator pedal according to the original proportional opening of the pedal and the learning value of the pedal opening and selecting the maximum learning value and the minimum learning value of the pedal opening from the learning value of the pedal opening; and acquiring the percentage opening of the accelerator pedal according to the original proportional opening of the pedal, the maximum learning value of the pedal opening and the minimum learning value of the pedal opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110512701.3A CN113147388B (en) | 2021-05-11 | 2021-05-11 | Vehicle accelerator pedal position analysis method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110512701.3A CN113147388B (en) | 2021-05-11 | 2021-05-11 | Vehicle accelerator pedal position analysis method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113147388A CN113147388A (en) | 2021-07-23 |
| CN113147388B true CN113147388B (en) | 2023-01-17 |
Family
ID=76874424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110512701.3A Active CN113147388B (en) | 2021-05-11 | 2021-05-11 | Vehicle accelerator pedal position analysis method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113147388B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218553A (en) * | 2016-08-03 | 2016-12-14 | 北京新能源汽车股份有限公司 | Method and device for learning minimum voltage of accelerator pedal sensor and vehicle control unit |
| CN107089140A (en) * | 2017-04-26 | 2017-08-25 | 北京新能源汽车股份有限公司 | Fault detection method and device for accelerator pedal mechanism and electric automobile |
| CN108819713A (en) * | 2018-04-24 | 2018-11-16 | 上海伊控动力系统有限公司 | Accelerator pedal aperture zero point method of adjustment for pure electric vehicle logistic car |
| CN108944440A (en) * | 2018-07-27 | 2018-12-07 | 北京新能源汽车股份有限公司 | Control method and device of accelerator pedal, vehicle and computing equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5641372B2 (en) * | 2012-09-26 | 2014-12-17 | 株式会社デンソー | Accelerator device |
| JP5672509B2 (en) * | 2012-11-28 | 2015-02-18 | 株式会社デンソー | Accelerator device |
-
2021
- 2021-05-11 CN CN202110512701.3A patent/CN113147388B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106218553A (en) * | 2016-08-03 | 2016-12-14 | 北京新能源汽车股份有限公司 | Method and device for learning minimum voltage of accelerator pedal sensor and vehicle control unit |
| CN107089140A (en) * | 2017-04-26 | 2017-08-25 | 北京新能源汽车股份有限公司 | Fault detection method and device for accelerator pedal mechanism and electric automobile |
| CN108819713A (en) * | 2018-04-24 | 2018-11-16 | 上海伊控动力系统有限公司 | Accelerator pedal aperture zero point method of adjustment for pure electric vehicle logistic car |
| CN108944440A (en) * | 2018-07-27 | 2018-12-07 | 北京新能源汽车股份有限公司 | Control method and device of accelerator pedal, vehicle and computing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113147388A (en) | 2021-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020087237A1 (en) | Controller for vehicle with self-diagnostic function and recording medium | |
| CN110594028A (en) | Throttle self-learning control method and device and electronic control unit | |
| CN113029586B (en) | Method and system for evaluating automobile starting and uniform speed driving dynamic property | |
| CN111140391A (en) | Air intake sensor fault processing method, device and system, vehicle and medium | |
| JP4476494B2 (en) | Method and apparatus for monitoring calculation element in automobile | |
| CN111016648B (en) | Throttle signal adjusting method and device | |
| Guse et al. | Objectified drivability evaluation and classification of passenger vehicles in automated longitudinal vehicle drive maneuvers with engine load changes | |
| KR101558789B1 (en) | Engine RPM Monitoring Method using Mode of Priority and Engine RPM Monitoring Controller thereof | |
| CN113147388B (en) | Vehicle accelerator pedal position analysis method and system | |
| US11499628B2 (en) | Apparatus for controlling shifting of a vehicle and a method therefor | |
| Chandrasekaran et al. | Objective drivability evaluation on compact SUV and comparison with subjective drivability | |
| KR101332022B1 (en) | ECU monitoring system and monitoring method | |
| CN110552800B (en) | Throttle control method and device | |
| CN113029587A (en) | Automobile performance analysis method and system, storage medium and electronic equipment | |
| CN116698442A (en) | Brake pedal clamping stagnation test method and device, electronic equipment and storage medium | |
| CN116766944A (en) | Method, device, equipment and storage medium for monitoring accelerator pedal opening | |
| CN114852094B (en) | Whole vehicle quality estimation method and device | |
| JP2021096616A (en) | Vehicle data classification method and vehicle data classification device | |
| CN115092117A (en) | Dynamic regulation method and device for vehicle power | |
| JP2019190324A (en) | Data recording device for vehicle and data recording method | |
| CN114881406A (en) | Drivability evaluation method, drivability evaluation system, readable storage medium, and computer device | |
| CN115045761B (en) | Engine charge control method, apparatus, medium and device | |
| CN116735226A (en) | Vehicle fuel consumption evaluation method and device, vehicle and storage medium | |
| US12031496B2 (en) | Method and device for diagnosing an internal combustion engine of a powertrain | |
| CN117341457A (en) | Vibration control method and device for vehicle operation working condition and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |