Control method and system of active stabilizer bar

Abstract

The invention belongs to the technical field of chassis intelligent control, and particularly relates to a control method and system for an active stabilizer bar. If the tire pressure difference value of the left tire and the right tire exceeds a specified range, a connection signal is transmitted to a control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the connection of the rod bodies of the left part and the right part so as to realize the connection of the whole active stabilizer bar and control the active stabilizer bar to work; if the tire pressure difference values of the left tire and the right tire are similar, a disconnection signal is transmitted to a control module of the active stabilizer bar, the control module of the active stabilizer bar controls the bar bodies of the left portion and the right portion to be disconnected, and disconnection of the whole active stabilizer bar is achieved; use of the active stabilizer bars is combined with tire pressure signals, the front active stabilizer bar and the rear active stabilizer bar can be matched with left and right tires of front and rear axles respectively, the active stabilizer bars can respond faster, and the working mode of the active stabilizer bars is judged and determined more simply by collecting the tire pressure signals.

Description

Technical Field

[0001] The invention belongs to the technical field of chassis intelligent control, and in particular relates to a control method and system for an active stabilizer bar. Background Art

[0002] The development of automobile intelligence is the trend of automobile development. All systems of automobiles are gradually developing in the direction of intelligence. The trend reflected in the field of chassis is intelligent chassis. With the continuous rise of intelligent chassis, intelligent control of active stabilizer bars will become the development trend of the industry. The control of active stabilizer bars usually determines whether to disconnect the active stabilizer bars by collecting vehicle signals. These signals usually include steering wheel angle, vehicle speed, lateral acceleration, yaw angular velocity, etc. For example, in the existing control method of active stabilizer bars for vehicles, the three control parameters of lateral acceleration, piston displacement and roll angle are combined to counteract the vehicle's driving state to control the active stabilizer bars. This control method uses more sensors, and the principles and implementation steps are relatively complicated. Summary of the invention

[0003] In order to overcome the above problems, the present invention provides a control method and system for an active stabilizer bar, which combines the use of the active stabilizer bar with the tire pressure signal. The front and rear active stabilizer bars can respectively cooperate with the left and right tires of the front and rear axles, so that the active stabilizer bar can react faster. It is simpler to judge and determine the working mode of the active stabilizer bar by collecting the tire pressure signal.

[0004] A control method for an active stabilizer bar comprises the following steps:

[0005] S1, collecting tire pressure signals of left and right tires;

[0006] S2. Compare the tire pressures of the left and right tires. If the tire pressure of any one of the left and right tires fluctuates instantaneously and the difference between the tire pressures of the left and right tires exceeds a specified range, it indicates that the vehicle is in a non-straight stable driving state; if the tire pressure difference between the left and right tires is similar and the duration of maintaining the similar state is maintained for more than 10 seconds, it indicates that the vehicle is in a straight and stable driving state;

[0007] S3. If the tire pressure difference between the left and right tires exceeds a specified range, a connection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the connection of the left and right rod bodies to achieve the connection of the entire active stabilizer bar and control the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar and the similar state is maintained for more than 10 seconds, a disconnection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the left and right rod bodies to disconnect to achieve the disconnection of the entire active stabilizer bar.

[0008] The tire pressure difference between the left and right tires in step S2 is calculated as follows:

[0009] Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively;

[0010] Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

[0011] In the step S2, the tire pressure difference between the left and right tires exceeds the prescribed range, which means that the tire pressure difference between the left and right tires exceeds 3%.

[0012] The tire pressure difference between the left and right tires in step S2 is similar, which means that the tire pressure difference between the left and right tires does not exceed 3%.

[0013] A control system for an active stabilizer bar comprises a tire pressure signal receiving module and a tire pressure signal processing module, wherein the tire pressure signal receiving module receives tire pressure signals of the left and right tires transmitted by pressure sensors on the left and right tires, and transmits the tire pressure signals of the left and right tires to the tire pressure signal processing module, the tire pressure signal processing module compares the tire pressures of the left and right tires, calculates the tire pressure difference between the left and right tires, if the tire pressure value of any one of the left and right tires produces an instantaneous fluctuation, and the tire pressure difference between the left and right tires exceeds a prescribed range, a connection signal is transmitted to a control module of the active stabilizer bar, the control module of the active stabilizer bar controls the connection of the left and right rod bodies to realize the connection of the entire active stabilizer bar, and controls the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar, and the duration of maintaining the similar state is maintained for more than 10 seconds, a disconnection signal is transmitted to the control module of the active stabilizer bar, the control module of the active stabilizer bar controls the left and right rod bodies to disconnect, and realizes the disconnection of the entire active stabilizer bar.

[0014] The tire pressure signal processing module calculates the tire pressure difference between the left and right tires in the following way:

[0015] Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively;

[0016] Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

[0017] Beneficial effects of the present invention:

[0018] The present invention combines the use of an active stabilizer bar with a tire pressure signal, and judges and determines the working mode of the active stabilizer bar by collecting the tire pressure signal, which is simpler; and the present invention can be applied to a variety of working conditions during driving, and the active stabilizer bar can be disconnected or connected according to different working conditions, thereby improving the comfort and handling stability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without creative work.

[0020] Figure 1 This is a flow chart of the method of the present invention, taking the front active stabilizer bar and the left and right front tires as an example. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0025] Example 1

[0026] A control method for an active stabilizer bar comprises the following steps:

[0027] S1, collecting tire pressure signals of left and right tires;

[0028] S2. Compare the tire pressures of the left and right tires. If the tire pressure of any one of the left and right tires fluctuates instantaneously and the difference between the tire pressures of the left and right tires exceeds a specified range, it indicates that the vehicle is in a non-straight stable driving state; if the tire pressure difference between the left and right tires is similar and the duration of maintaining the similar state is maintained for more than 10 seconds, it indicates that the vehicle is in a straight and stable driving state;

[0029] S3. If the tire pressure difference between the left and right tires exceeds a specified range, a connection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the connection of the left and right rod bodies to achieve the connection of the entire active stabilizer bar and control the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar and the similar state is maintained for more than 10 seconds, a disconnection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the left and right rod bodies to disconnect to achieve the disconnection of the entire active stabilizer bar.

[0030] The tire pressure difference between the left and right tires in step S2 is calculated as follows:

[0031] Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively;

[0032] Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

[0033] In the step S2, the tire pressure difference between the left and right tires exceeds the prescribed range, which means that the tire pressure difference between the left and right tires exceeds 3%.

[0034] The tire pressure difference between the left and right tires in step S2 is similar, which means that the tire pressure difference between the left and right tires does not exceed 3%.

[0035] A control system for an active stabilizer bar comprises a tire pressure signal receiving module and a tire pressure signal processing module, wherein the tire pressure signal receiving module receives tire pressure signals of the left and right tires transmitted by pressure sensors on the left and right tires, and transmits the tire pressure signals of the left and right tires to the tire pressure signal processing module, the tire pressure signal processing module compares the tire pressures of the left and right tires, calculates the tire pressure difference between the left and right tires, if the tire pressure value of any one of the left and right tires produces an instantaneous fluctuation, and the tire pressure difference between the left and right tires exceeds a prescribed range, a connection signal is transmitted to a control module of the active stabilizer bar, the control module of the active stabilizer bar controls the connection of the left and right rod bodies to realize the connection of the entire active stabilizer bar, and controls the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar, and the duration of maintaining the similar state is maintained for more than 10 seconds, a disconnection signal is transmitted to the control module of the active stabilizer bar, the control module of the active stabilizer bar controls the left and right rod bodies to disconnect, and realizes the disconnection of the entire active stabilizer bar.

[0036] The tire pressure signal processing module calculates the tire pressure difference between the left and right tires in the following way:

[0037] Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively;

[0038] Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

[0039] Example 2

[0040] A control method for an active stabilizer bar, such as Figure 1 As shown,

[0041] S1, collecting tire pressure signals of left and right tires;

[0042] S2, the tire pressure signals of the left and right tires are transmitted to the tire pressure signal processing module and processed;

[0043] Compare the tire pressures on the left and right sides. If the tire pressure values ​​fluctuate instantaneously and the difference between the tire pressure values ​​on the left and right sides exceeds the specified range (the difference between the tire pressure values ​​on the left and right sides exceeds 3%), it indicates that the vehicle is in a non-straight stable driving state. If the tire pressure values ​​on both sides are similar (the difference between the tire pressure values ​​on the left and right sides does not exceed 3%) and the difference does not exceed the specified value for a long time (and can be maintained for 10 seconds), it indicates that the vehicle is in a straight and stable driving state. (This embodiment provides a relatively simple calculation method: assume that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; the calculation is divided into two steps: (1) calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl)Pr respectively; (2) compare the absolute value of (Pl-Pr) / Pl and the absolute value of (Pr-Pl)Pr. The value with the smaller absolute value is output to the control module of the active stabilizer bar.

[0044] S3, the tire pressure signal processing module transmits the processed signal to the control module of the active stabilizer bar;

[0045] (The active stabilizer bar is a U-shaped structure, divided into left and right parts, which are connected by a mechanical structure in the middle of the entire bar body. The connection and disconnection of the left and right parts are controlled by the control module.) If the difference between the tire pressure values ​​on the left and right sides exceeds the specified range, the tire pressure signal processing module will transmit a connection signal to the control module of the active stabilizer bar; if the tire pressure values ​​on both sides are similar and the difference does not exceed the specified value for a long time, the tire pressure signal processing module will transmit a disconnection signal to the control module of the active stabilizer bar.

[0046] S4. If the control module of the active stabilizer bar receives a disconnection signal from the tire pressure signal processing module, the left and right parts of the bar body are controlled to be disconnected, thereby disconnecting the entire active stabilizer bar;

[0047] S5. If the control module of the active stabilizer bar receives a connection signal from the tire pressure signal processing module, it controls the connection between the left and right parts of the rod body to achieve the connection of the entire stabilizer bar, and controls the active stabilizer bar to function.

[0048] A control system for an active stabilizer bar includes the following modules:

[0049] A pressure sensor is used to obtain the tire pressure signal of the left tire;

[0050] A pressure sensor is used to obtain the tire pressure signal of the right tire;

[0051] A tire pressure signal processing module is used to receive and compare the tire pressure signals of the left and right tires, and transmit the comparison results to the control module of the active stabilizer bar;

[0052] The control module of the active stabilizer bar is used to control the active stabilizer bar. When the control module of the active stabilizer bar receives the information of disconnection from the tire pressure signal processing module, the active stabilizer bar is controlled to be disconnected; when the control module of the active stabilizer bar receives the information of connection from the tire pressure signal processing module, the active stabilizer bar is controlled to be effective.

[0053] Example 3

[0054] The control method of the active stabilizer bar specifically includes:

[0055] S1, collecting tire pressure signals of left and right tires;

[0056] In this embodiment, the left and right tire pressure sensors have high accuracy and detect the tire pressures of the left and right tires in real time. The vehicle speed set in this embodiment is 40-80 km / h; (assuming that the tire pressure Pl collected by the left tire pressure sensor is 2.3 bar, and the tire pressure Pr collected by the right tire pressure sensor is 2.5 bar)

[0057] S2, the tire pressure signals of the left and right tires are transmitted to the tire pressure signal processing module and processed;

[0058] In this embodiment, the tire pressures of the left and right tires detected in real time by the left and right tire pressure sensors are transmitted to the tire pressure signal processing module in real time, and the tire pressures on the left and right sides are compared in the module. In this embodiment, the initial tire pressures on both sides are assumed to be the same. For example, if the tire pressure values ​​produce instantaneous fluctuations, the difference between the tire pressure values ​​on the left and right sides exceeds the specified range, and the vehicle is in a non-straight stable driving state; if the tire pressure values ​​on both sides are similar, and the difference does not exceed the specified value for a long time, the vehicle is in a straight and stable driving state; (The signal processing module processes the tire pressure signal. The calculation process is: (1) y1 = (2.3-2.5) / 2.3 = -0.087, y2 = (2.3-2.5) / 2.5 = -0.08, (2) The absolute value of y1 is 0.087, and the absolute value of y2 is 0.08. The smaller 0.08 is converted to 8%, which exceeds the set 3%, and the connection signal is output to the control module of the active stabilizer bar)

[0059] S3, the tire pressure signal processing module transmits the processed signal to the control module of the active stabilizer bar;

[0060] If the difference between the tire pressure values ​​on the left and right sides exceeds the specified range, the tire pressure signal processing module will transmit a connection signal to the control module of the active stabilizer bar; if the tire pressure values ​​on both sides are similar and the difference does not exceed the specified value for a long time, the tire pressure signal processing module will transmit a disconnection signal to the control module of the active stabilizer bar.

[0061] S4, if the control module of the active stabilizer bar receives a disconnection signal from the tire pressure signal processing module, the active stabilizer bar is controlled to be disconnected;

[0062] S5. If the control module of the active stabilizer bar receives a connection signal from the tire pressure signal processing module, the active stabilizer bar is controlled to function.

[0063] In this embodiment, the tire pressure signal processing module transmits the connection signal to the control module of the active stabilizer bar. The control module of the active stabilizer bar controls the connection between the left and right parts of the rod body to realize the connection of the entire stabilizer bar, control the active stabilizer bar to function, and improve the vehicle's handling stability.

[0064] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept (and calculation method) of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0066] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A control method for an active stabilizer bar, characterized in that: The following steps are involved: S1, collecting tire pressure signals of left and right tires; S2. Compare the tire pressures of the left and right tires. If the tire pressure of any one of the left and right tires fluctuates instantaneously and the difference between the tire pressures of the left and right tires exceeds a specified range, it indicates that the vehicle is in a non-straight stable driving state; if the tire pressure difference between the left and right tires is similar and the duration of maintaining the similar state is maintained for more than 10 seconds, it indicates that the vehicle is in a straight and stable driving state; S3. If the tire pressure difference between the left and right tires exceeds a specified range, a connection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the connection of the left and right rod bodies to achieve the connection of the entire active stabilizer bar and control the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar and the similar state is maintained for more than 10 seconds, a disconnection signal is transmitted to the control module of the active stabilizer bar, and the control module of the active stabilizer bar controls the left and right rod bodies to disconnect to achieve the disconnection of the entire active stabilizer bar.

2. The control method of an active stabilizer bar according to claim 1, characterized in that: The tire pressure difference between the left and right tires in step S2 is calculated as follows: Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively; Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

3. The control method of an active stabilizer bar according to claim 1, characterized in that: In the step S2, the tire pressure difference between the left and right tires exceeds the prescribed range, which means that the tire pressure difference between the left and right tires exceeds 3%.

4. The control method of an active stabilizer bar according to claim 1, characterized in that: The tire pressure difference between the left and right tires in step S2 is similar, which means that the tire pressure difference between the left and right tires does not exceed 3%.

5. A control system for an active stabilizer bar, characterized in that: It includes a tire pressure signal receiving module and a tire pressure signal processing module, wherein the tire pressure signal receiving module receives the tire pressure signals of the left and right tires transmitted by the pressure sensors on the left and right tires, and transmits the tire pressure signals of the left and right tires to the tire pressure signal processing module, the tire pressure signal processing module compares the tire pressures of the left and right tires, calculates the tire pressure difference between the left and right tires, if the tire pressure value of any one of the left and right tires produces an instantaneous fluctuation, and the tire pressure difference between the left and right tires exceeds a specified range, a connection signal is transmitted to the control module of the active stabilizer bar, the control module of the active stabilizer bar controls the connection of the left and right rod bodies to achieve the connection of the entire active stabilizer bar, and controls the active stabilizer bar to function; if the tire pressure difference between the left and right tires is similar, and the time for maintaining the similar state is maintained for more than 10s, a disconnection signal is transmitted to the control module of the active stabilizer bar, the control module of the active stabilizer bar controls the left and right rod bodies to disconnect, and achieves the disconnection of the entire active stabilizer bar.

6. The control system of an active stabilizer bar according to claim 5, characterized in that: The tire pressure signal processing module calculates the tire pressure difference between the left and right tires in the following way: Step 1, assuming that the tire pressure collected by the left tire pressure sensor is Pl, and the tire pressure collected by the right tire pressure sensor is Pr; calculate the values ​​of y1=(Pl-Pr) / Pl and y2=(Pr-Pl) / Pr respectively; Step 2, compare the absolute values ​​of y1 and y2, and take the smaller absolute value as the tire pressure difference between the left and right tires.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the control method of the active stabilizer bar as described in any one of claims 1 to 4 is implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the control method of the active stabilizer bar as claimed in any one of claims 1 to 4 is implemented.

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