CN114148334A - Speed direction detection method for automatic transmission automobile - Google Patents
Speed direction detection method for automatic transmission automobile Download PDFInfo
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- CN114148334A CN114148334A CN202111522208.6A CN202111522208A CN114148334A CN 114148334 A CN114148334 A CN 114148334A CN 202111522208 A CN202111522208 A CN 202111522208A CN 114148334 A CN114148334 A CN 114148334A
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- vehicle speed
- speed direction
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 title claims abstract description 17
- 230000007935 neutral effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/0098—Details of control systems ensuring comfort, safety or stability not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/1005—Transmission ratio engaged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/18—Braking system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a vehicle speed direction detection method for an automatic transmission vehicle, wherein a gear shift lever on the automatic transmission vehicle belongs to basic standard matching, and meanwhile, a safety ABS system is considered as a mandatory configuration item required by laws and regulations, so that the current vehicle speed direction can be reliably and accurately determined only by a gear shift lever position signal, a vehicle speed signal and a wheel speed direction signal provided by a wheel speed sensor of an ABS on the premise of not increasing any cost and abandoning the addition of an additional rotating speed sensor, further, the running direction of the vehicle can be determined absolutely, and basic vehicle control such as gear selection, torque matching and the like is performed. The invention can obviously reduce the cost generated by additional hardware, can effectively solve the problem that the vehicle cannot judge the speed direction after one or more failed wheel speed direction signals are invalid, and can also avoid the problem of misdiagnosis of the speed direction caused by wheel slip on a steep slope or an ice and snow road surface.
Description
Technical Field
The invention relates to the field of vehicle control, in particular to a vehicle speed direction detection method for an automatic transmission vehicle.
Background
The relationship between automobiles and people as a part of daily life is becoming more and more compact, and particularly, in the present day, along with the rapid increase of automobile keeping quantity, the problems of road congestion, driving comfort, safety in driving and the like are highlighted, so that the automatic transmission automobile becomes a necessary option for more and more users to select automobiles.
The automatic transmission vehicle takes a vehicle speed direction signal as a basic signal for representing the motion state of the vehicle, influences the gear control, the clutch torque control and the like of an automatic transmission, and has great influence on the motion control of the vehicle.
The prior art generally has two means for acquiring a vehicle speed direction signal:
firstly, on an automatic gearbox provided with an output shaft rotating speed sensor, because the rotating speed of the output shaft is consistent with the vehicle speed direction, the sensor can directly acquire a vehicle speed direction signal;
secondly, on an automobile with an ABS function, the wheel speed direction obtained from each wheel speed sensor is directly used and is used as a vehicle speed direction signal after being processed by an algorithm in a TCU;
in the practical application process, because the influence of the vehicle speed direction signal on gear control and the like of the gearbox is large, the two types of signals are combined for use so as to improve the reliability of the system.
However, the prior art has the following disadvantages to be solved:
1. the use of a transmission output shaft speed sensor requires additional design, production, maintenance, and product costs.
2. Depending on the signals of the wheel speed direction sensors, if one or more of the wheel speed direction signals fail or the wheels slip on a steep slope or an ice-snow road, the vehicle speed direction is easily misjudged, and the driving safety is seriously influenced.
Disclosure of Invention
In view of the above, the present invention aims to provide a vehicle speed direction detection method for an automatic transmission vehicle, so as to solve the problems of high cost and erroneous judgment and misdiagnosis caused by a sensor in the prior art.
The technical scheme adopted by the invention is as follows:
a vehicle speed direction detection method for an automatic transmission vehicle, comprising:
detecting a gear shift lever position signal, a vehicle speed signal and a wheel speed sensor signal of an anti-lock system in real time in the running process of a vehicle;
when the gear shift lever position signal is detected to be in a preset forward gear, judging that the current vehicle speed direction signal is the forward direction;
when the gear shift lever position signal is detected to be in a reverse gear, judging that the current vehicle speed direction signal is a reverse direction;
when the gear shifting lever position signal is detected to be in the neutral position and the vehicle speed is greater than a preset first vehicle speed threshold value, the current vehicle speed direction signal is enabled to be consistent with a wheel speed direction signal provided by a wheel speed sensor of an anti-lock braking system.
In at least one possible implementation manner, when the forward direction is determined, a preset vehicle speed direction signal value is synchronously set to be + 1; when the reverse direction is determined, the preset vehicle speed direction signal value is synchronously set to-1.
In at least one possible implementation manner, after the forward direction is determined, if the gear shift lever position signal is detected to be changed from the forward gear to the neutral gear and the vehicle speed is smaller than a preset second vehicle speed threshold value, the vehicle speed direction signal value is changed from +1 to an initial value of 0.
In at least one possible implementation manner, after the forward direction is determined, if the gear shift lever position signal is detected to be changed from the forward gear to the reverse gear and the vehicle speed is smaller than a preset third vehicle speed threshold value, the vehicle speed direction signal value is changed from +1 to-1.
In at least one possible implementation manner, after the reverse direction is determined, if the gear shift lever position signal is detected to be changed from the reverse gear to the neutral gear and the vehicle speed is smaller than a preset second vehicle speed threshold value, the vehicle speed direction signal value is changed from-1 to an initial value of 0.
In at least one possible implementation manner, after the reverse direction is determined, if the gear shift lever position signal is changed from the reverse gear to the forward gear and the vehicle speed is smaller than a preset third vehicle speed threshold value, the vehicle speed direction signal value is changed from-1 to + 1.
In at least one possible implementation manner, after the current vehicle speed direction signal is determined by using the wheel speed direction signal, if it is detected that the vehicle speed is less than a preset second vehicle speed threshold value, setting the current vehicle speed direction signal value as an initial value 0, wherein the second vehicle speed threshold value is less than the first vehicle speed threshold value.
In at least one possible implementation manner, after the current vehicle speed direction signal is determined by the wheel speed direction signal, if the gear shift lever position signal is detected to be changed from the neutral position to the non-neutral position and the vehicle speed is smaller than a preset second vehicle speed threshold value, the current vehicle speed direction signal value is set to be an initial value 0.
In at least one possible implementation, the maintaining consistent with the wheel speed direction signal provided by the wheel speed sensor of the anti-lock braking system comprises: keeping consistent with the sum of the left wheel speed direction signal and the right wheel speed direction signal.
In at least one possible implementation, the forward gear includes any one of: drive gear, overtaking gear, manual gear.
The invention has the main design concept that on an automatic transmission automobile, a gear shift lever belongs to basic standard configuration, and meanwhile, a safety ABS system is considered as a mandatory configuration item required by laws and regulations, so that the current speed direction can be reliably and accurately determined only by a gear shift lever position signal, a speed signal and a wheel speed direction signal provided by a wheel speed sensor of the ABS on the premise of not increasing any cost, namely, on the premise of abandoning the addition of an additional rotating speed sensor, further, the running direction of the automobile can be determined absolutely, and basic vehicle control such as gear selection, torque matching and the like is performed. The invention can obviously reduce the cost generated by additional hardware, can effectively solve the problem that the vehicle cannot judge the speed direction after one or more failed wheel speed direction signals are invalid, and can also avoid the problem of misdiagnosis of the speed direction caused by wheel slip on a steep slope or an ice and snow road surface.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a flowchart of a vehicle speed direction detection method for an automatic transmission vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The invention provides an embodiment of a vehicle speed direction detection method for an automatic transmission vehicle, which specifically comprises the following steps as shown in figure 1:
step S1, detecting a gear shift lever position signal, a vehicle speed signal and a wheel speed sensor signal of an anti-lock system in real time in the running process of the vehicle;
step S21, when the gear shift lever position signal is detected to be in a preset forward gear, the current vehicle speed direction signal is judged to be the forward direction;
step S22, when the gear shift lever position signal is detected to be in the reverse gear, the current vehicle speed direction signal is judged to be the reverse direction;
and step S23, when the gear shift lever position signal is detected to be in the neutral position and the vehicle speed is greater than a preset first vehicle speed threshold value, enabling the current vehicle speed direction signal to be consistent with a wheel speed direction signal provided by a wheel speed sensor of the anti-lock braking system.
Further, when the forward direction is determined, a preset vehicle speed direction signal value is synchronously set to be + 1; when the reverse direction is determined, the preset vehicle speed direction signal value is synchronously set to-1.
Further, after the forward direction is determined, if the gear shift lever position signal is detected to be changed from the forward gear to the neutral gear and the vehicle speed is less than a preset second vehicle speed threshold value, the value of the vehicle speed direction signal is changed from +1 to an initial value of 0.
Further, after the forward direction is determined, if the gear shift lever position signal is detected to be changed from the forward gear to the reverse gear and the vehicle speed is less than a third vehicle speed threshold value, the vehicle speed direction signal value is changed from +1 to-1.
Further, after the reverse direction is determined, if the gear shift lever position signal is detected to be changed from the reverse gear to the neutral gear and the vehicle speed is less than a preset second vehicle speed threshold value, the value of the vehicle speed direction signal is changed from-1 to an initial value of 0.
Further, after the reverse direction is determined, if the gear shift lever position signal is detected to be changed from the reverse gear to the forward gear and the vehicle speed is less than a third vehicle speed threshold value, the vehicle speed direction signal value is changed from-1 to + 1.
Further, after the wheel speed direction signal is used for judging the current vehicle speed direction signal, if the vehicle speed is detected to be smaller than a second vehicle speed threshold value, setting the current vehicle speed direction signal value as an initial value 0, wherein the second vehicle speed threshold value is smaller than the first vehicle speed threshold value.
Further, after the current vehicle speed direction signal is determined by the wheel speed direction signal, if it is detected that the shift lever position signal is changed from the neutral position to the non-neutral position and the vehicle speed is less than a second vehicle speed threshold value, the current vehicle speed direction signal value is set to an initial value of 0.
Further, said maintaining in correspondence with a wheel speed direction signal provided by a wheel speed sensor of an anti-lock braking system comprises: keeping consistent with the sum of the left wheel speed direction signal and the right wheel speed direction signal.
Further, the forward gear includes any one of: a driving gear (D), an overtaking gear (S) and a manual gear (M).
In summary, the main design concept of the present invention is that, in an automatic transmission vehicle, a shift lever belongs to a basic standard configuration, and meanwhile, a safety ABS system is considered as a mandatory configuration item required by regulations, so that on the premise of not increasing any cost, i.e., on the premise of not adding an additional rotational speed sensor, only a shift lever position signal, a vehicle speed signal, and a wheel speed direction signal provided by a wheel speed sensor of the ABS, a current vehicle speed direction can be reliably and accurately determined, and further, a vehicle running direction can be determined without loss, and basic vehicle control such as gear selection and torque matching can be performed accordingly. The invention can obviously reduce the cost generated by additional hardware, can effectively solve the problem that the vehicle cannot judge the speed direction after one or more failed wheel speed direction signals are invalid, and can also avoid the problem of misdiagnosis of the speed direction caused by wheel slip on a steep slope or an ice and snow road surface.
In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.
Claims (10)
1. A vehicle speed direction detection method for an automatic transmission vehicle is characterized by comprising the following steps:
detecting a gear shift lever position signal, a vehicle speed signal and a wheel speed sensor signal of an anti-lock system in real time in the running process of a vehicle;
when the gear shift lever position signal is detected to be in a preset forward gear, judging that the current vehicle speed direction signal is the forward direction;
when the gear shift lever position signal is detected to be in a reverse gear, judging that the current vehicle speed direction signal is a reverse direction;
when the gear shifting lever position signal is detected to be in the neutral position and the vehicle speed is greater than a preset first vehicle speed threshold value, the current vehicle speed direction signal is enabled to be consistent with a wheel speed direction signal provided by a wheel speed sensor of an anti-lock braking system.
2. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 1, characterized in that when a forward direction is determined, a preset vehicle speed direction signal value is synchronously set to + 1; when the reverse direction is determined, the preset vehicle speed direction signal value is synchronously set to-1.
3. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 2, wherein after the determination of the forward direction, if the shift lever position signal is detected to be changed from the forward range to the neutral range and the vehicle speed is less than a preset second vehicle speed threshold value, the vehicle speed direction signal value is changed from +1 to an initial value of 0.
4. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 2, wherein after the forward direction is determined, if the shift lever position signal is detected to change from the forward range to the reverse range and the vehicle speed is less than a preset third vehicle speed threshold value, the vehicle speed direction signal value is changed from +1 to-1.
5. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 2, wherein after the reverse direction is determined, if the shift lever position signal is detected to be changed from the reverse gear to the neutral gear and the vehicle speed is less than a preset second vehicle speed threshold value, the vehicle speed direction signal value is changed from-1 to an initial value of 0.
6. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 2, wherein after the reverse direction is determined, if the shift lever position signal is detected to be changed from the reverse gear to the forward gear and the vehicle speed is less than a preset third vehicle speed threshold value, the vehicle speed direction signal value is changed from-1 to + 1.
7. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 1, wherein after determining the current vehicle speed direction signal from the wheel speed direction signal, if the vehicle speed is detected to be less than a preset second vehicle speed threshold value, the current vehicle speed direction signal value is set to an initial value 0, wherein the second vehicle speed threshold value is less than the first vehicle speed threshold value.
8. The vehicle speed direction detection method for an automatic transmission vehicle according to claim 1, wherein after determining the current vehicle speed direction signal from the wheel speed direction signal, if it is detected that the shift lever position signal is changed from a neutral position to a non-neutral position and the vehicle speed is less than a preset second vehicle speed threshold value, the current vehicle speed direction signal value is set to an initial value of 0.
9. The method of any one of claims 1 to 8, wherein the step of keeping in line with a wheel speed direction signal provided by a wheel speed sensor of an anti-lock braking system comprises: keeping consistent with the sum of the left wheel speed direction signal and the right wheel speed direction signal.
10. The vehicle speed direction detection method for an automatic transmission automobile according to any one of claims 1 to 8, wherein the forward range includes any one of: drive gear, overtaking gear, manual gear.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111522208.6A CN114148334B (en) | 2021-12-13 | 2021-12-13 | Speed direction detection method for automatic transmission automobile |
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|---|---|---|---|
| CN202111522208.6A CN114148334B (en) | 2021-12-13 | 2021-12-13 | Speed direction detection method for automatic transmission automobile |
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| CN114148334B CN114148334B (en) | 2024-04-19 |
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| Publication number | Publication date |
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| CN114148334B (en) | 2024-04-19 |
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