CN114379308A - Lifter mode identification method of vehicle air suspension system and air suspension system - Google Patents
Lifter mode identification method of vehicle air suspension system and air suspension system Download PDFInfo
- Publication number
- CN114379308A CN114379308A CN202111597103.7A CN202111597103A CN114379308A CN 114379308 A CN114379308 A CN 114379308A CN 202111597103 A CN202111597103 A CN 202111597103A CN 114379308 A CN114379308 A CN 114379308A
- Authority
- CN
- China
- Prior art keywords
- vehicle body
- body acceleration
- lifter
- value
- vehicle
- 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.)
- Granted
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims abstract description 117
- 238000001514 detection method Methods 0.000 claims description 77
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000012567 pattern recognition method Methods 0.000 claims description 12
- 230000003213 activating effect Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 abstract description 11
- 230000006872 improvement Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/052—Pneumatic spring characteristics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
- B60G17/01908—Acceleration or inclination sensors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention provides a lifter mode identification method of a vehicle air suspension system, which detects the change of vehicle body acceleration when the vehicle speed is 0 so as to detect whether a vehicle is on a lifter, and activates a lifter mode when the change of the vehicle body acceleration is judged to meet the requirement. Compared with the existing method for identifying the mode of the lifting machine based on the height sensor, the method has the advantage that the identification speed of the mode of the lifting machine is higher, so that the technical problem of air bag damage after a vehicle falls to the ground from the lifting machine due to slow identification of the mode of the lifting machine can be solved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a lifter mode identification method of a vehicle air suspension system and the vehicle air suspension system.
Background
Existing vehicles equipped with air suspension systems typically have a lifter mode. When the vehicle is lifted by the lift, the lift mode must be activated. The lifter mode is primarily used to disable the height compensation function of the air suspension. The height compensation function is to adjust the height to the target height in an air inflation or air exhaust mode after the actual height of the air suspension exceeds the target height for a certain deviation time. Thus, when the vehicle is not dormant and the air suspension system height compensation function is not disabled, driving the vehicle to and lifting the lift causes the air suspension system to continue to exhaust in an effort to restore the suspension height to the target height, resulting in the air bags being completely evacuated. After the vehicle has completely landed, the airbag will be completely deflated for a period of time, with the result that the airbag is damaged both by the vertical load directly pressing on the airbag and by the shear forces to which the airbag is subjected when it is driven out of the lift.
Therefore, it is necessary to automatically recognize the lifter mode of the air suspension system. In the prior art, a lifter mode of an air suspension system is identified based on a height sensor, but the problem of slow identification exists, so that when a vehicle is lifted by the lifter, the problem of airbag damage caused by slow identification still exists.
Disclosure of Invention
The invention provides a lifter mode identification method of a vehicle air suspension system and the vehicle air suspension system, which can trigger a lifter mode immediately when a vehicle is lifted by the lifter so as to avoid the technical problem of air bag damage after the vehicle falls to the ground from the lifter due to slow lifter mode identification.
A first aspect of the present invention provides a lifter pattern recognition method for an air suspension system of a vehicle, the method performed by a controller, comprising:
when the vehicle speed is 0, detecting the lifter mode of the current round;
if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions;
and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode.
As an improvement of the above, the method further comprises:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
As an improvement of the above solution, after calculating the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor if the detected value of a vehicle body acceleration sensor is detected to be greater than a preset threshold value for the first time in the current round of detection, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors being impacted according to the tire rundown speed and the maximum value of the height difference between the current air suspensions, the method further includes;
and when detecting that the detection values of the other vehicle body acceleration sensors are not all larger than a preset threshold value within the longest interval time, restarting the detection of the lifter mode.
As an improvement of the above aspect, the step of calculating the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor specifically includes:
acquiring a first height value through a height sensor, and differentiating the first height value to obtain the tire descending speed; and the first height value is the height value of the air suspension of the tire corresponding to the vehicle body acceleration sensor of which the first detection value is greater than a preset threshold value in the current round detection.
As an improvement of the above scheme, the step of calculating the longest interval time of the vehicle body subjected to the impact corresponding to the other vehicle body acceleration sensors according to the tire bounce speed and the maximum value of the height difference between the current air suspensions specifically includes:
calculating the maximum interval time according to the following formula:
ΔT＝(ΔH_max+h0)/v
wherein, Delta T is the longest interval time, Delta H_maxAt the maximum of the current height difference between the air suspensions, h0V is the tire descending speed and is the relative height difference of the preset supporting surfaces of the lifter.
As an improvement of the above scheme, after the detection value of the vehicle body acceleration sensor is detected to be greater than the preset threshold value for the first time in the current round of detection, the method further includes:
setting the flag position of the lifter mode as 1;
then, after detecting that the detection values of the other vehicle body acceleration sensors are not all greater than the preset threshold value within the longest interval time, the method further includes:
the lifter mode flag is set to 0.
A second aspect of the present invention provides a vehicle air suspension system comprising a controller configured to:
when the vehicle speed is 0, detecting the lifter mode of the current round;
if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions;
and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode.
As an improvement of the above, the controller is further configured to:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
As an improvement of the above, the controller is further configured to:
and when detecting that the detection values of the other vehicle body acceleration sensors are not all larger than a preset threshold value within the longest interval time, restarting the detection of the lifter mode.
Compared with the prior art, the lifter mode identification method of the vehicle air suspension system and the air suspension system have the following beneficial effects:
the method for identifying the lifter mode of the vehicle air suspension system comprises the steps of detecting the lifter mode of the current turn when the vehicle speed is 0; if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions; and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode. According to the invention, when the vehicle speed is 0, the change of the vehicle body acceleration is detected to detect whether the vehicle is on the lifter, so that when the change of the vehicle body acceleration is judged to meet the requirement, the lifter mode is activated. Compared with the existing method for identifying the mode of the lifting machine based on the height sensor, the mode identification speed of the lifting machine is higher, so that the technical problem of damage to the air bag after the vehicle falls to the ground from the lifting machine due to slow mode identification of the lifting machine can be solved.
Drawings
Fig. 1 is a schematic flow chart of a lifter pattern recognition method of a vehicle air suspension system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Existing automobiles equipped with air suspension systems typically have a lift mode that is initiated when the automobile is lifted by the lift. However, the prior art is generally based on height sensors for lift pattern recognition. The mode recognition method of the lifting machine based on the height sensor has the problem of slow recognition, and the mode recognition method cannot automatically recognize that the automobile is on the lifting machine immediately when the automobile is lifted by the lifting machine, so that the air suspension system continuously exhausts air to restore the automobile to the target height, and further the air bag damage of the automobile after the automobile falls to the ground from the lifting machine is caused.
Based on this, the embodiment of the invention provides a lifter pattern recognition method of a vehicle air suspension system, so as to avoid the above problems.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a lifter pattern recognition method of a vehicle air suspension system according to an embodiment of the present invention.
Specifically, the lifter pattern recognition method of the vehicle air suspension system includes steps S110 to S130:
s110, detecting the lifter mode of the current turn when the vehicle speed is 0;
s120, if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the maximum value of the tire rundown speed and the height difference value between the current air suspensions;
and S130, when detecting that the detection values of the other vehicle body acceleration sensors are all larger than a preset threshold value in the longest interval time, activating a lifter mode.
It should be noted that the vehicle air suspension system should include a suspension height sensor that detects the height of the air suspension and a body acceleration sensor that detects the acceleration of the vehicle body so that the controller can know the change in height of the vehicle body and the change in acceleration of the vehicle body. For example, for an air suspension system using a semi-active suspension sensor, a scheme of 4 height sensors +3 acceleration sensors is generally selected, and specifically includes a left front suspension height sensor, a right front suspension height sensor, a left rear suspension height sensor, a right rear suspension height sensor, a left front vertical acceleration sensor, a right front vertical acceleration sensor, and a right front vertical acceleration sensor. Each sensor is communicated with the controller, each sensor can acquire data at a preset interval period, and the controller can actively acquire the state data of the vehicle body from each detection sensor.
It is understood that the vehicle body acceleration sensor can be used to detect the moving state of the vehicle body and sometimes also the moving state of the front wheels in the vertical direction. In consideration of the impact characteristics of the vehicle on the lifting machine, the embodiment of the invention selects the vehicle body acceleration sensor to detect the motion posture of the vehicle body in the period time, and can quickly identify whether the vehicle is on the lifting machine.
Specifically, in the embodiment of the present invention, the tire rundown speed is understood to be a speed at which the distance between the vehicle body and the tire is increased, and it is understood that when the vehicle is lifted by the lifting machine, the height of the vehicle body relative to the chassis is also increased, and at this time, the distance between the vehicle body and the tire is increased, so that in the embodiment of the present invention, the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor is calculated and regarded as the lifting speed of the lifting machine for lifting the vehicle.
Further, as for the air suspension system of the semi-active suspension sensor, it has a vehicle body acceleration sensor disposed on the left front side member, the right front side member and the right rear side member. In the Y-side view of the vehicle, the vehicle body acceleration sensor is located close to the tire having the same orientation. Thus, each body acceleration sensor can find its corresponding tire.
Specifically, the height of the air suspension in the embodiment of the present invention refers to the distance from the wheel center to the wheel arch, which can be obtained by a height sensor, which is the prior art and will not be described herein in detail.
Further, when the maximum value of the height difference between the air suspensions is implemented, after the height of each air suspension is obtained through each height sensor, the height difference between the air suspensions is calculated, and the value with the largest difference is selected as the maximum value of the height difference between the air suspensions.
Specifically, when detecting that the speed of a motor vehicle is 0, the controller begins to carry out the detection of the machine mode of lifting, when detecting that the detected value of first automobile body acceleration sensor is greater than the predetermined threshold value when surveying, judges that the automobile body receives great rocking, tentatively thinks that current vehicle is on the machine of lifting. Since the vehicle body may be shaken due to the fact that the vehicle or heavy goods are suddenly moved out of the trunk, etc., in order to prevent erroneous determination, it is necessary to further determine whether the detection values of the other vehicle body acceleration sensors are also larger than a preset threshold value within the time when the vehicle body is impacted.
Based on the technical scheme provided by the embodiment, the vehicle body acceleration change is detected when the vehicle speed is 0 so as to detect whether the vehicle is on the lifter, and therefore, when the vehicle body acceleration change is judged to meet the requirement, the lifter mode is activated.
Based on the solutions provided by the above embodiments, in an optional implementation manner, after step S120, the method further includes S140:
and S140, when the detected values of the other vehicle body acceleration sensors are not all larger than the preset threshold value in the longest interval time, restarting the detection of the lifter mode.
It can be understood that when the detection values of the other vehicle body acceleration sensors are not greater than the preset threshold value within the longest interval time, the vehicle body shaking caused by the fact that the current vehicle may be heavy goods suddenly moved out of a trunk or the like is indicated. At this time, the lifter mode need not be activated.
Based on the solutions provided by the above embodiments, in an optional implementation manner, the method further includes:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
In the embodiment of the invention, in order to prevent misjudgment, when the vehicle speed is 0, the occupancy information of the vehicle should be judged. It can be understood that the scene that the vehicle body has large shaking when the vehicle speed is 0 is not only the scene that the vehicle is lifted by the lifting machine, but also the scene that the passenger gets off after the vehicle is parked, for example, when the vehicle is parked on the road and a heavy passenger leaves the vehicle, the vehicle body can also generate large shaking. If the vehicle is still detected on the lifter through the change of the vehicle body acceleration in the next period, the problem of false recognition exists at the moment. Therefore, the lifter pattern is not recognized by the vehicle body acceleration of the next cycle.
Based on the technical solution provided by the foregoing example, in an optional implementation manner, for the step "calculating the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor" in S120, specifically, the step is calculated by:
acquiring a first height value through a height sensor, and differentiating the first height value to obtain the tire descending speed; and the first height value is the height value of the air suspension of the tire corresponding to the vehicle body acceleration sensor of which the first detection value is greater than a preset threshold value in the current round detection.
During specific implementation, each height sensor can monitor the height of the corresponding air suspension in real time, the controller detects the height of the air suspension in a time period by acquiring the height of the air suspension, and then differential processing is carried out, so that the speed corresponding to the height of the tire and the wheel arch during the time period can be acquired, and the speed is used for estimating the rising speed of the lifting machine.
Based on the technical solutions provided by the above examples, in an optional implementation manner, for the step "calculate the longest interval time of the vehicle body being impacted corresponding to the other vehicle body acceleration sensors according to the maximum value of the height difference between the tire rundown speed and each current air suspension" in S120, specifically:
the maximum interval time is calculated by the following formula:
ΔT＝(ΔH_max+h0)/v
wherein, Delta T is the longest interval time, Delta H_maxAt the maximum of the current height difference between the air suspensions, h0V is the tire descending speed and is the relative height difference of the preset supporting surfaces of the lifter.
Exemplary, h0The height difference of each supporting surface of the supporting arm type lifter is set to be 15 which is set to be less than or equal to 15mm according to JT/T155 automobile lifter product standard, and the invention does not limit the height difference of each supporting surface of the supporting arm type lifter as long as the requirement of the relative height difference of each supporting surface of the lifter is met.
Based on the technical solution provided by the above embodiment, in an optional implementation manner, after detecting that the detection value of a vehicle body acceleration sensor is greater than the preset threshold value for the first time in the current round of detection, the method further includes:
setting the flag position of the lifter mode as 1;
then, after detecting that the detection values of the other vehicle body acceleration sensors are not all greater than the preset threshold value within the longest interval time, the method further includes:
the lifter mode flag is set to 0.
That is, in the embodiment of the present invention, the controller records the lifter mode when the detection value of the first vehicle body acceleration sensor is greater than the threshold value, so as to trigger the subsequent monitoring of other vehicle body acceleration sensors.
In a further alternative embodiment, the lift mode flag is set to 1 after the lift mode is activated.
That is, in embodiments of the present invention, the controller records the elevator mode and stores it for power-down memory. For example, when the vehicle is on the lifter, the vehicle is powered off, and when the vehicle is powered on next time, the vehicle is judged to be still on the lifter by acquiring the mode zone of the lifter, and at the moment, the height compensation function is not allowed to be activated, so that the controller is required to memorize the mode of activating the lifter in the last ignition cycle.
Accordingly, embodiments of the present invention also provide a vehicle air suspension system, comprising a controller configured to:
when the vehicle speed is 0, detecting the lifter mode of the current round;
if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions;
and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode.
Specifically, the vehicle air suspension system comprises a controller, a suspension height sensor and a vehicle body acceleration sensor. Wherein, the suspension height sensor and the vehicle body acceleration sensor are connected with a vehicle body.
The suspension height sensor comprises a left front suspension height sensor, a right front suspension height sensor, a left rear suspension height sensor and a right rear suspension height sensor, and the automobile body acceleration sensor comprises a left front vertical acceleration sensor, a right front vertical acceleration sensor and a right front vertical acceleration sensor.
The controller can acquire signals of each height sensor and each vehicle body acceleration sensor so as to monitor the motion state of the vehicle.
In an optional embodiment, the controller is further configured to:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
In an optional embodiment, the controller is further configured to:
and when detecting that the detection values of the other vehicle body acceleration sensors are not all larger than a preset threshold value within the longest interval time, restarting the detection of the lifter mode.
The step of calculating the tire rundown speed of the tire corresponding to the vehicle body acceleration sensor specifically includes:
acquiring a first height value through a height sensor, and differentiating the first height value to obtain the tire descending speed; and the first height value is the height value of the air suspension of the tire corresponding to the vehicle body acceleration sensor of which the first detection value is greater than a preset threshold value in the current round detection.
In an alternative embodiment, the step of calculating the longest interval time of the vehicle body subjected to the impact corresponding to the other vehicle body acceleration sensors according to the tire bounce speed and the maximum value of the height difference between the current air suspensions is specifically as follows:
calculating the maximum interval time according to the following formula:
ΔT＝(ΔH_max+h0)/v
wherein, Delta T is the longest interval time, Delta H_maxAt the maximum of the current height difference between the air suspensions, h0V is the tire descending speed and is the relative height difference of the preset supporting surfaces of the lifter.
In an optional embodiment, after detecting that the detection value of a vehicle body acceleration sensor is greater than the preset threshold value for the first time in the current round of detection, the method further includes:
setting the flag position of the lifter mode as 1;
then, after detecting that the detection values of the other vehicle body acceleration sensors are not all greater than the preset threshold value within the longest interval time, the method further includes:
the lifter mode flag is set to 0.
In another optional embodiment, after the lift mode is activated, the method further comprises:
the lifter mode flag is set to 1.
It should be noted that, the action and principle of the vehicle air suspension system provided by the embodiment of the present invention correspond to those of the lifter mode of the vehicle air suspension system provided by the above embodiment one by one, and redundant description is not repeated here.
The invention provides a lifter mode identification method of a vehicle air suspension system and the vehicle air suspension system, which comprises the steps of detecting the lifter mode of the current round when the vehicle speed is 0; if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions; and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode. According to the invention, when the vehicle speed is 0, the change of the acceleration of the vehicle body is detected to detect whether the vehicle is on the lifter or not, so that the lifter mode is activated when the change of the acceleration of the vehicle body is judged to meet the requirement.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A lifter pattern recognition method of a vehicle air suspension system, the method performed by a controller, comprising:
when the vehicle speed is 0, detecting the lifter mode of the current round;
if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions;
and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode.
2. The lifter pattern recognition method of a vehicle air suspension system according to claim 1, further comprising:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
3. The lifter pattern recognition method of a vehicle air suspension system according to claim 1, wherein after calculating a tire rundown speed of a tire corresponding to a vehicle body acceleration sensor if it is first detected in a current round of detection that a detected value of the vehicle body acceleration sensor is greater than a preset threshold value, and calculating a maximum interval time during which a vehicle body corresponding to another vehicle body acceleration sensor is subjected to an impact, based on the tire rundown speed and a maximum value of a height difference between current air suspensions, further comprising;
and when detecting that the detection values of the other vehicle body acceleration sensors are not all larger than a preset threshold value within the longest interval time, restarting the detection of the lifter mode.
4. The lifter pattern recognition method of a vehicle air suspension system according to claim 1, wherein the step of calculating the tire rundown velocity of the tire corresponding to the vehicle body acceleration sensor includes:
acquiring a first height value through a height sensor, and differentiating the first height value to obtain the tire descending speed; and the first height value is the height value of the air suspension of the tire corresponding to the vehicle body acceleration sensor of which the first detection value is greater than a preset threshold value in the current round detection.
5. The lifter pattern recognition method of a vehicle air suspension system according to claim 1, wherein the step of calculating the maximum interval time during which the vehicle body corresponding to the other vehicle body acceleration sensor is subjected to the impact according to the tire rundown speed and the maximum value of the height difference between the current air suspensions is specifically:
calculating the maximum interval time according to the following formula:
ΔT＝(ΔH_max+h0)/v
wherein, Delta T is the longest interval time, Delta H_maxAt the maximum of the current height difference between the air suspensions, h0V is the tire descending speed and is the relative height difference of the preset supporting surfaces of the lifter.
6. The lifter pattern recognition method of a vehicle air suspension system according to claim 3, further comprising, after first detecting that a detected value of a body acceleration sensor is greater than a preset threshold value in current round detection:
setting the flag position of the lifter mode as 1;
then, after detecting that the detection values of the other vehicle body acceleration sensors are not all greater than the preset threshold value within the longest interval time, the method further includes:
the lifter mode flag is set to 0.
7. The lifter pattern recognition method of a vehicle air suspension system according to claim 1, further comprising, after activating the lift mode:
the lifter mode flag is set to 1.
8. A vehicle air suspension system comprising a controller configured to:
when the vehicle speed is 0, detecting the lifter mode of the current round;
if the detected value of a vehicle body acceleration sensor is detected to be larger than a preset threshold value for the first time in the current round detection, calculating the tire descending speed of the tire corresponding to the vehicle body acceleration sensor, and calculating the longest interval time of the vehicle body corresponding to other vehicle body acceleration sensors when being impacted according to the tire descending speed and the maximum value of the height difference value between the current air suspensions;
and when detecting that the detection values of other vehicle body acceleration sensors are all larger than a preset threshold value within the longest interval time, activating a lifter mode.
9. The vehicle air suspension system of claim 7, wherein the controller is further configured to:
in the current round detection, seat occupation information of the automobile is acquired every other preset period;
acquiring seat occupation information of the current period when the current period is finished;
if the seat occupying information of the period is different from the seat occupying information of the previous period, the monitoring operation of the detection value of the vehicle body acceleration sensor of the next period is cancelled;
and if the seat occupying information of the current period is the same as the seat occupying information of the previous period, monitoring the detection value of the vehicle body acceleration sensor of the next period to judge whether the detection value of the vehicle body acceleration sensor is greater than a preset threshold value.
10. The vehicle air suspension system of claim 7, wherein the controller is further configured to:
and when detecting that the detection values of the other vehicle body acceleration sensors are not all larger than a preset threshold value within the longest interval time, restarting the detection of the lifter mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597103.7A CN114379308B (en) | 2021-12-24 | 2021-12-24 | Lifter mode identification method of vehicle air suspension system and air suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597103.7A CN114379308B (en) | 2021-12-24 | 2021-12-24 | Lifter mode identification method of vehicle air suspension system and air suspension system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114379308A true CN114379308A (en) | 2022-04-22 |
| CN114379308B CN114379308B (en) | 2023-07-14 |
Family
ID=81198255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111597103.7A Active CN114379308B (en) | 2021-12-24 | 2021-12-24 | Lifter mode identification method of vehicle air suspension system and air suspension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114379308B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575115A (en) * | 1983-05-20 | 1986-03-11 | Mitsubishi Jidosha Kogyo K.K. | Vehicle height control system |
| US20070185623A1 (en) * | 2006-02-03 | 2007-08-09 | Shih-Ken Chen | Vehicle wheel lift detection |
| CN110023166A (en) * | 2016-12-09 | 2019-07-16 | 日立汽车系统株式会社 | State of motion of vehicle apparatus for predicting |
| CN112677727A (en) * | 2020-12-31 | 2021-04-20 | 华人运通(江苏)技术有限公司 | Control method for vehicle body height compensation of semi-active suspension |
| CN112757860A (en) * | 2021-01-25 | 2021-05-07 | 江苏大学 | NMPC-based hub direct-drive air suspension system and cooperative control method |
-
2021
- 2021-12-24 CN CN202111597103.7A patent/CN114379308B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575115A (en) * | 1983-05-20 | 1986-03-11 | Mitsubishi Jidosha Kogyo K.K. | Vehicle height control system |
| US20070185623A1 (en) * | 2006-02-03 | 2007-08-09 | Shih-Ken Chen | Vehicle wheel lift detection |
| CN110023166A (en) * | 2016-12-09 | 2019-07-16 | 日立汽车系统株式会社 | State of motion of vehicle apparatus for predicting |
| CN112677727A (en) * | 2020-12-31 | 2021-04-20 | 华人运通(江苏)技术有限公司 | Control method for vehicle body height compensation of semi-active suspension |
| CN112757860A (en) * | 2021-01-25 | 2021-05-07 | 江苏大学 | NMPC-based hub direct-drive air suspension system and cooperative control method |
Non-Patent Citations (1)
| Title |
|---|
| 郭孔辉等: "《面向多约束的可举升复合油气悬架偏频优化》", 《湖南大学学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114379308B (en) | 2023-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7162343B2 (en) | Intelligent vehicle rollover detection methods and systems | |
| US7873449B2 (en) | Vehicle safety system with advanced tire monitoring | |
| US6438475B1 (en) | Crash detection system | |
| EP0554131B1 (en) | System and method for determining a reduction in the pneumatic tire pressure | |
| US5967548A (en) | Safety arrangement | |
| JP4078305B2 (en) | Method for determining trigger determination of vehicle occupant restraint means | |
| US6169946B1 (en) | Device and method for controlling accident protection triggering devices in motor vehicles | |
| EP1101658B1 (en) | System and method for detecting the onset of a vehicle rollover | |
| US5787370A (en) | Method and apparatus for vehicle headlight-range adjusment | |
| US20060267750A1 (en) | Tire abnormal state monitoring system for an automotive vehicle | |
| US7422087B2 (en) | Method and system for detecting vehicle rollover events | |
| US6290019B1 (en) | System and method for vehicle side rollover aversion | |
| JP4833853B2 (en) | Vehicle rollover prevention monitor using kinetic energy and lateral acceleration | |
| US20050004730A1 (en) | Vehicle-rollover detecting apparatus and vehicle-rollover detecting method | |
| US20060184299A1 (en) | System for determining rollover in a vehicle control system | |
| JP2008514496A (en) | Drive control method for occupant protection means and drive control device for occupant protection means | |
| JP4992443B2 (en) | Vehicle rollover prevention device | |
| CN114379308A (en) | Lifter mode identification method of vehicle air suspension system and air suspension system | |
| EP2154032B1 (en) | Device for controlling side collision airbag | |
| EP1616725A2 (en) | Tire deflation warning system and method thereof | |
| EP1642780A1 (en) | A method and system for detecting a vehicle rollover | |
| JP3802812B2 (en) | Detection method for differential limiting device, tire pressure drop detection method using the detection method, device, and tire decompression determination program | |
| KR101102769B1 (en) | Rollover Sensing Apparatus of Automobile and its Sensing Method | |
| JP2008528377A (en) | Safety system | |
| CN110901629B (en) | Rollover early warning method and rollover early warning device for heavy 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 | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240222 Granted publication date: 20230714 |
|
| PP01 | Preservation of patent right |