CN115285093A - Push rod zero-position self-learning method of electronic booster for automobile and electronic equipment - Google Patents
Push rod zero-position self-learning method of electronic booster for automobile and electronic equipment Download PDFInfo
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- CN115285093A CN115285093A CN202210984740.8A CN202210984740A CN115285093A CN 115285093 A CN115285093 A CN 115285093A CN 202210984740 A CN202210984740 A CN 202210984740A CN 115285093 A CN115285093 A CN 115285093A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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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
-
- 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
- B60T2220/00—Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof
- B60T2220/04—Pedal travel sensor, stroke sensor; Sensing brake request
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The invention provides a push rod zero self-learning method of an electronic booster for an automobile, which is applied to an electronic booster system and comprises the following steps: after the whole vehicle is electrified, judging whether the current working condition of the vehicle meets the working condition for carrying out the zero self-learning of the push rod; when the pedal operation meets the operation condition every time, determining a single learning value according to the zero position data of the push rod, and after the whole vehicle is powered off, determining at least one effective learning value when the number of the single learning values reaches a preset number; determining a target zero learning value according to the effective learning value and a currently used zero reference value; judging whether the target zero learning value meets the use condition or not according to the currently used zero reference value and/or the preset zero value; and if so, storing the target zero learning value as a zero reference value used after the whole vehicle is electrified again. The method and the device calculate and update the zero position of the push rod in a self-learning mode, so that the accuracy of identifying the braking intention of a driver by the vehicle is maintained, and the driving safety is effectively improved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a push rod zero-position self-learning method of an electronic booster for an automobile and electronic equipment.
Background
With the increasing demands of consumers on the safety of automobiles, many electromechanical products are emerging in the field of automobile braking. Compare traditional vacuum booster, electronic booster is through installing the push rod displacement sensor on brake pedal, gathers the signal of telecommunication that this sensor sent, thereby the analysis driver steps on the degree of depth of brake pedal and makes the vehicle slow down.
However, the active correction of the zero value of the push rod displacement sensor is absent in the prior art, and various objective factors may cause that the vehicle cannot accurately identify the braking intention of the driver, thereby causing safety accidents.
Disclosure of Invention
Aiming at the technical problems, the application provides a push rod zero position self-learning method of an electronic booster for an automobile and electronic equipment, which can keep the accuracy of identifying the braking intention of a driver by a vehicle and effectively improve the driving safety.
The invention provides a push rod zero-position self-learning method of an electronic booster for an automobile, which is applied to an electronic booster system and is characterized by comprising the following steps of:
after the whole vehicle is electrified, judging whether the current working condition of the vehicle meets the working condition for carrying out the zero self-learning of the push rod;
if the working condition of the push rod zero self-learning is met, determining a single learning value according to the zero data of the push rod when the pedal operation meets the operating condition;
after the whole vehicle is powered off, if the number of the single learning values reaches a preset number, determining at least one effective learning value according to the single learning value;
determining a target zero learning value according to the effective learning value and a currently used zero reference value;
judging whether the target zero position learning value meets the use condition or not according to a currently used zero position reference value and/or a preset zero position value, wherein the preset zero position value is a zero position value stored when the whole vehicle is off-line from a production line;
and if the target zero learning value meets the use condition, storing the target zero learning value as a zero reference value used after the whole vehicle is electrified again.
In one embodiment, the operating condition includes the vehicle being in motion, the electronic booster system of the vehicle, and the brake pedal not being malfunctioning.
In one embodiment, the operating condition includes a rate of brake pedal depression and/or release within a predetermined range, and the pushrod zero position data includes a start zero position and/or an end zero position of the pushrod during pedal operation.
In one embodiment, the operating conditions are performed during the same brake cycle, the pushrod zero position data includes a starting zero position and an ending zero position of the pushrod during a single pedal operation, and the single learned value is a mean value of the starting zero position and the ending zero position.
In one embodiment, said determining at least one valid learned value from said single learned values comprises:
judging whether a preset number of the single learning values meet the calculation condition or not; the calculation condition includes whether a variance of a preset number of the single learning values is less than or equal to a first threshold;
and if the preset number of the single learning values meet the calculation condition, taking the average value of the preset number of the single learning values as an effective learning value.
In one embodiment, determining a target zero learn value based on the effective learn value and a currently used zero reference value comprises:
comparing the magnitude of the effective learning value with the currently used zero reference value;
if the effective learning value is larger than the currently used zero reference value, the target zero learning value is the difference between the currently used zero reference value and a calibration value;
and if the effective learning value is less than or equal to the currently used zero reference value, the target zero learning value is the sum of the currently used zero reference value and a calibration value.
In an embodiment, the usage condition includes that a deviation of the target zero position learning value from the currently used zero position reference value is less than or equal to a second threshold value, and/or a deviation of the target zero position learning value from the preset zero position value is less than or equal to a third threshold value.
In an embodiment, the method further comprises at least one of:
if the current working condition of the vehicle does not accord with the working condition, determining a single learning value according to the zero data of the push rod when the pedal operation accords with the operating condition, and lighting a corresponding instrument fault lamp;
if the pedal operation does not accord with the operation condition and/or the number of the single learning values does not reach the preset number, returning to the step of judging whether the current working condition of the vehicle accords with the working condition for carrying out the push rod zero self-learning;
and if the target zero learning value does not accord with the use condition, recording a fault code, and lighting a corresponding instrument fault lamp.
An electronic device, comprising: a memory and a processor, wherein the memory stores a self-learning program, and when the processor executes the self-learning program, the steps of the push rod zero self-learning method of the electronic booster for automobile according to any one of claims 1 to 8 are realized.
A computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the push rod zero self-learning method for an electronic booster for automobile according to any one of claims 1 to 8.
The method and the device calculate and update the zero position of the push rod in a self-learning mode, so that the accuracy of identifying the braking intention of a driver by the vehicle is kept, and the driving safety is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic flow chart of the self-learning of the zero learning value of the target push rod according to an embodiment of the present application;
fig. 2 is a specific flowchart of self-learning for obtaining the zero learning value of the push rod target according to an embodiment of the present application.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention. As used herein, "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a push rod zero self-learning method for an electronic booster for an automobile includes the following steps:
s101, after the whole vehicle is electrified, judging whether the current working condition of the vehicle meets the working condition for carrying out zero self-learning of the push rod.
Specifically, the push rod zero position refers to a base value of a position of a push rod connected to a brake pedal. The working conditions specifically include: the vehicle is in motion, the electronic booster system of the vehicle is not in fault, and the brake pedal is effective.
If the electronic booster system of the vehicle is not in fault and/or the brake pedal is effective, and the vehicle is in a static state, the learning is carried out again; if the vehicle is in a moving state, but the electronic booster system of the vehicle is in failure and/or the brake pedal is invalid, the fault code is recorded, and the corresponding instrument fault lamp is lightened.
S102, when the pedal operation meets the operation condition, a single learning value is determined according to the zero data of the push rod, and after the whole vehicle is powered off, at least one effective learning value is determined when the number of the single learning values reaches a preset number.
Specifically, the operating conditions include a rate of depression and/or release of the brake pedal within a predetermined range. Preferably, the predetermined range is 5mm/s. The zero position data of the push rod comprises a starting zero position and/or a finishing zero position of the push rod in the pedal operation process. Preferably, the preset number comprises: 5 and integer multiples thereof. And when the number of the single learning values reaches the preset number, obtaining at least one average value of the preset number of the single learning values in the acquired sequence, and further determining at least one effective learning value. For example, after 5 single learning values are cumulatively acquired, one effective learning value is calculated, and after 5 single learning values are continuously cumulatively acquired, one effective learning value is calculated again, and the effective learning values may be plural.
S103, determining a target zero position learning value according to the effective learning value and the currently used zero position reference value.
The currently used zero reference value is used for compensating the opening degree of a brake pedal of a driver in the driving process, and the opening degree of the brake pedal of the driver is compensated, so that the opening degree of the brake pedal is 0 when the driver does not step on the brake pedal, and the vehicle can accurately identify the braking intention of the driver.
Comparing the effective learning value of at least one determined in S102 with the currently used zero reference value, including: if the system only obtains one effective learning value, the target zero learning value is: when the effective learning value is larger than the zero reference value used currently, the target zero learning value is equal to the effective learning value minus the calibration value; when the effective learned value is less than or equal to the currently used zero reference value, then the target zero learned value is equal to the effective learned value plus the calibration value. If the system acquires the effective learning values with the number larger than or equal to two, the target zero learning value is as follows according to the acquisition sequence of the effective learning values: when the first effective learning value is larger than the zero reference value used currently, the target learning zero-bit value is equal to the first effective learning value minus the calibration value; when the first valid learn value is less than or equal to the currently used zero reference value, the target zero learn value is equal to the first valid learn value plus the calibration value. Then, comparing the second effective learning value with the currently used zero reference value, and when the second effective learning value is larger than the currently used zero reference value, the target zero learning value is equal to the target zero learning value updated based on the first effective learning value minus the calibration value; and when the second effective learning value is smaller than or equal to the currently used zero reference value, the target zero learning value is equal to the target zero learning value updated based on the first effective learning value plus the calibration value, and so on until the target zero learning value is updated by using all the obtained effective learning values, and the target zero learning value obtained by updating finally is used as the target zero learning value. Preferably, the calibration value is 0.2.
And S104, judging whether the target zero learning value meets the use condition or not according to the currently used zero reference value and/or the preset zero value.
The target zero learn value determined in S103 is compared to the currently used zero reference value and/or the preset zero value. The using condition is that the deviation of the target zero position learning value and the currently used zero position reference value is smaller than a second threshold value, and/or the deviation of the target zero position learning value and a preset zero position value is smaller than a third threshold value. Preferably, the second threshold and the third threshold are both 2%. And the preset zero value is a zero value stored when the whole vehicle is off-line from a production line. In one embodiment, when the vehicle is off-line from the whole vehicle production line, the zero position of the push rod is firstly learned, and the system records the zero position value of the push rod when the brake pedal is not stepped on and is used as the preset zero position value for zero self-learning in the subsequent vehicle use process.
And S105, if the zero position reference value is met, storing the target zero position learning value as a zero position reference value used after the whole vehicle is electrified again.
And (4) storing the target zero learning value determined in the S104, and automatically assigning the target zero learning value to a currently used zero reference value after the whole vehicle is electrified again.
Referring to fig. 2, in the present embodiment, after the vehicle is powered on, the target zero learning value stored when the vehicle was powered off last time is read, and is assigned to the currently used zero reference value. When the vehicle is offline from a production line and is powered on for the first time, the preset zero value is assigned to the currently used zero reference value.
In the present embodiment, it is determined whether the electronic booster system is malfunctioning and/or the brake pedal is active. If not, recording a fault code, and lightening a corresponding instrument fault lamp; if yes, the next step is carried out.
In the present embodiment, it is determined whether the vehicle is in a moving state. If not, the learning is carried out again; if yes, entering the next step.
In this embodiment, it is determined whether the driver is depressing and/or releasing the brake pedal at a rate not exceeding 5mm/s in a single braking cycle. If not, re-learning; if the preset values are matched, respectively recording a zero value pos _ up (starting zero position) when the brake pedal is pressed down and a zero value pos _ down (end zero position) when the brake pedal is released, and entering the next step.
In this embodiment, it is determined whether the difference between pos _ up (start zero position) and pos _ down (end zero position) is less than 2%. If not, the learning is carried out again; if yes, the average value of pos _ up (starting zero position) and pos _ down (end zero position) is obtained as a single learning value, and the next step is carried out.
In the present embodiment, it is determined whether the number of single learning values reaches a preset number. If not, re-learning; if so, the next step is entered.
In the present embodiment, it is determined whether the variance of the preset number of single learning values is less than 2%. If not, re-learning; if yes, the next step is carried out.
In the present embodiment, the average of a preset number of single learning values is taken as an effective learning value, and the obtained effective learning value is compared with the zero reference value currently used. If the effective learning value is larger than the zero reference value used currently, the target zero learning value is equal to the effective learning value minus 0.2; if the effective learned value is less than or equal to the currently used zero reference value, the target zero learned value is equal to the effective learned value plus 0.2.
In this embodiment, it is determined whether a deviation between the target zero learning value and the currently used zero reference value is less than 2%, and/or whether a deviation between the target zero learning value and the preset zero value is less than 2%. And if the zero learning values are consistent, storing the target zero learning value, and finishing the zero self-learning of the push rod. Otherwise, recording the fault code and lighting the corresponding instrument fault lamp.
The application also provides an electronic device comprising a memory and a processor. Wherein the memory has a self-learning program stored thereon. When the processor executes the self-learning program, the electronic device is caused to execute the method according to the embodiment shown in fig. 1 or fig. 2.
The present application also provides a computer-readable storage medium having a computer program stored thereon. The computer program, when executed by the processor described above, causes the electronic device to perform the method of the embodiment shown in fig. 1 or fig. 2.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A push rod zero-position self-learning method of an electronic booster for an automobile is applied to an electronic booster system and is characterized by comprising the following steps:
after the whole vehicle is electrified, judging whether the current working condition of the vehicle meets the working condition for carrying out the zero self-learning of the push rod;
if the working condition of the push rod zero-position self-learning is met, determining a single learning value according to the zero-position data of the push rod when the pedal operation meets the operating condition;
after the whole vehicle is powered off, if the number of the single learning values reaches a preset number, determining at least one effective learning value according to the single learning value;
determining a target zero learning value according to the effective learning value and a currently used zero reference value;
judging whether the target zero position learning value meets the use condition or not according to a currently used zero position reference value and/or a preset zero position value, wherein the preset zero position value is a zero position value stored when the whole vehicle is offline from a production line;
and if the target zero learning value meets the use condition, storing the target zero learning value as a zero reference value used after the whole vehicle is electrified again.
2. The self-learning method of claim 1, wherein the operating conditions include the vehicle being in motion, an electronic booster system of the vehicle, and a brake pedal not failing.
3. The self-learning method of claim 1, wherein the operating condition includes a rate of brake pedal depression and/or release within a predetermined range, and the pushrod zero position data includes a starting zero position and/or an ending zero position of the pushrod during pedal operation.
4. The self-learning method of claim 3, wherein the operating conditions occur during the same braking cycle, the pushrod zero data includes a start zero position and an end zero position of the pushrod during a single pedal operation, and the single learned value is a mean of the start zero position and the end zero position.
5. The self-learning method of claim 1, wherein the determining at least one valid learning value from the single learning value comprises:
judging whether a preset number of the single learning values meet the calculation condition or not; the calculation condition includes whether a variance of a preset number of the single-time learning values is less than or equal to a first threshold;
and if the preset number of the single learning values meet the calculation condition, taking the average value of the preset number of the single learning values as an effective learning value.
6. The self-learning method of claim 1, wherein determining a target zero-bit learned value based on the valid learned value and a currently used zero-bit reference value comprises:
comparing the magnitude of the effective learn value with the currently used zero reference value;
if the effective learning value is larger than the currently used zero reference value, the target zero learning value is the difference between the currently used zero reference value and a calibration value;
and if the effective learning value is less than or equal to the currently used zero reference value, the target zero learning value is the sum of the currently used zero reference value and a calibration value.
7. The self-learning method according to claim 1, wherein the usage condition includes that a deviation of the target zero-bit learning value from the currently used zero-bit reference value is less than or equal to a second threshold value, and/or that a deviation of the target zero-bit learning value from the preset zero-bit value is less than or equal to a third threshold value.
8. The push rod zero self learning method of claim 1 further comprising at least one of:
if the current working condition of the vehicle does not accord with the working condition, determining a single learning value according to the zero data of the push rod when the pedal operation accords with the operating condition, and lighting a corresponding instrument fault lamp;
if the pedal operation does not accord with the operation condition and/or the number of the single learning values does not reach the preset number, returning to the step of judging whether the current working condition of the vehicle accords with the working condition for carrying out the push rod zero position self-learning;
and if the target zero learning value does not accord with the use condition, recording a fault code, and lighting a corresponding instrument fault lamp.
9. An electronic device, comprising: a memory and a processor, wherein the memory stores a self-learning program, and when the processor executes the self-learning program, the method for self-learning the zero position of the push rod of the electronic booster for the automobile as claimed in any one of claims 1 to 8 is realized.
10. A computer-readable storage medium, characterized in that the readable storage medium stores thereon a computer program, which when executed by the processor, implements the steps of the push rod zero position self-learning method for an electronic booster for automobile according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210984740.8A CN115285093A (en) | 2022-08-17 | 2022-08-17 | Push rod zero-position self-learning method of electronic booster for automobile and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210984740.8A CN115285093A (en) | 2022-08-17 | 2022-08-17 | Push rod zero-position self-learning method of electronic booster for automobile and electronic equipment |
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| CN111959471A (en) * | 2020-08-21 | 2020-11-20 | 上海拿森汽车电子有限公司 | Braking force compensation method and device based on decoupling type electronic booster |
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| CN114802281A (en) * | 2022-05-30 | 2022-07-29 | 重庆长安新能源汽车科技有限公司 | Self-learning method for zero point of accelerator pedal, electronic equipment and storage medium |
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