A control method and system for a folding steering wheel

Abstract

The present application relates to a kind of control method and system of folding steering wheel, including acquisition power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal, vehicle door opening and closing signal and drivable state signal;Based on power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal and vehicle door opening and closing signal, different folding steering wheel control mode is judged and output, the control mode includes welcome mode, rest mode and folding zero point position reset mode;According to control mode, steering wheel is folded or folding zero point position reset;After steering wheel folding is completed, based on power signal, steering wheel steering angle signal and drivable state signal, steering wheel is unfolded, the present application can accurately judge vehicle state and output different control mode, realize steering wheel automatic folding and stretching control, according to user demand increase in-vehicle space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle steering wheels, in particular to a control method and system of a folding steering wheel. BACKGROUND

[0002] With the rapid development of automatic driving technology, cars will gradually become a new living space. The spacious and free range of activities gradually becomes the necessary demand of users. Among them, the foldable steering wheel can give the driver more cabin layout space and a sense of technology, and the user demand is increasingly strong. Major OEMs and suppliers have begun to research foldable steering wheels, and various folding structure forms have been derived.

[0003] Patent document CN112596427B discloses an intelligent welcome electric control system for a steering wheel and a vehicle, which includes a switch acquisition circuit, a micro control unit and a drive circuit. The switch acquisition circuit, the micro control unit and the drive circuit are connected in sequence. The switch acquisition circuit is connected with a control switch. The micro control unit is used for receiving door state information. The drive circuit is connected with an execution mechanism. The switch acquisition circuit is used for acquiring the state of the control switch and transmitting the state information of the control switch to the micro control unit. The micro control unit is used for judging the getting-on and getting-off actions of the driver according to the door state information and the state information of the control switch, and transmitting an execution command to the drive circuit. The drive circuit controls the action of the execution mechanism according to the execution command, and the position of the steering wheel is adjusted by the execution mechanism. The movement of the steering wheel realizes the welcome function. The application only considers the door state information in the judgment logic of the steering wheel movement, does not combine multiple vehicle signals for judgment, and does not provide a diagnostic interface. The judgment logic of the steering wheel movement is not perfect and is not suitable for vehicle transplantation.

[0004] Therefore, it is necessary to further improve the control method of the existing folding steering wheel. The steering wheel folding and unfolding is controlled by combining the vehicle signals and the active control interface, so as to improve the accuracy of the judgment logic. SUMMARY

[0005] One of the purposes of the present application is to provide a control method of a folding steering wheel to solve the problem of imperfect judgment logic of the steering wheel movement in the control method of the existing folding steering wheel, which is not suitable for vehicle transplantation. The second purpose is to provide a system with the control method of the folding steering wheel.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] In a first aspect, the present application discloses a control method of a folding steering wheel, comprising:

[0008] S1, signal acquisition, including power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal, door opening and closing signal and drivable state signal;

[0009] S2, based on the power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal and door opening and closing signal, judge and output different control modes of folding steering wheel, the control mode includes welcome mode, rest mode and folding zero point position reset mode;

[0010] S3, folding or folding zero point position reset of steering wheel according to control mode;

[0011] S4, after the steering wheel folding is completed, the steering wheel is unfolded based on the power signal, the steering wheel steering angle signal and the drivable state signal.

[0012] Further, in the S2, the method for judging and outputting the welcome mode is:

[0013] S211, when the power signal is powered on, the main driver seat personnel state signal is switched from someone to no one, and if the steering wheel folding state signal is normally unfolded, the vehicle state is continuously monitored;

[0014] S212, during the monitoring period, if the monitoring gear signal is P gear and the steering wheel steering angle is less than ± 5°, it is judged that the vehicle meets the welcome mode activation condition, if the monitoring gear signal is not P gear or the steering wheel steering angle does not meet less than ± 5°, it is judged that the vehicle does not meet the welcome mode activation condition and the process is ended;

[0015] S213, if the welcome mode activation condition is met and the door opening and closing signal is normally closed, the welcome mode is output;

[0016] S214, after the steering wheel is folded, the welcome mode stops outputting.

[0017] Further, the method for judging and outputting the rest mode is:

[0018] S221, collect rest activation interface information, the interface can set the system state to rest activation state through diagnostic instruction;

[0019] S222, if the rest activation state setting is completed and the power signal is powered on, the gear signal is P gear and the main driver seat personnel state signal is someone, it is judged that the rest mode activation condition is met, otherwise the process is ended;

[0020] S223, if the rest mode activation condition is met and the steering wheel steering angle is less than ± 5°, the rest mode is output;

[0021] S224, after the steering wheel is folded, the rest mode stops outputting.

[0022] Further, the method for judging and outputting the folding zero position reset mode is:

[0023] S231, the folding zero position reset activation interface information is collected, and the interface can set the system state to the reset state through a diagnostic instruction;

[0024] S232, if the reset state setting is completed, the power supply signal is powered on, the gear signal is P gear, and the steering wheel steering angle is less than ±5°, the composite reset activation condition is determined, and the folding zero position reset mode is output;

[0025] S233, after the folding zero position reset is completed, the folding zero position reset mode stops outputting.

[0026] Further, in the S3, the steering wheel is folded according to the control mode, and the folding method is:

[0027] The steering wheel folding mechanism and the steering upper shaft telescopic mechanism are all moved to the respective minimum limit, and the steering upper shaft angle adjusting mechanism is moved to the maximum limit.

[0028] Further, in the S4, the determination method for unfolding the steering wheel based on the power supply signal, the steering wheel steering angle signal and the drivable state signal is:

[0029] S41, rest exit interface information or welcome exit interface information is collected, and the interface can set the system state to the rest exit state or the welcome exit state through a diagnostic instruction;

[0030] S42, if the rest exit state or the welcome exit state setting is completed and the steering wheel steering angle is less than ±5°, the steering wheel is controlled to be unfolded.

[0031] Further, if the steering wheel is folded according to the welcome mode, the welcome exit state is automatically entered according to the vehicle signal, and the method for automatically entering the welcome exit state according to the vehicle signal is:

[0032] After the vehicle power-on self-test is completed, if the drivable state signal is drivable and the steering wheel is in the folded state, the welcome exit state is set, and S42 is entered, if the drivable state signal is not drivable or the steering wheel is in the unfolded state, the process is ended.

[0033] The application also discloses a control system using the above control method, which comprises:

[0034] The folding controller outputs a motor driving instruction after judging that a control instruction needs to be executed through a whole vehicle signal;

[0035] The electrically adjustable steering upper shaft assembly comprises a steering upper shaft, a telescopic mechanism and an angle adjusting mechanism arranged on the steering upper shaft, and a folding controller is arranged to control the displacement of the angle adjusting mechanism and the telescopic mechanism along the radial direction and the axial direction of the electrically adjustable steering upper shaft assembly, respectively.

[0036] The folding steering wheel assembly is fixed to the electrically adjustable steering upper shaft assembly and comprises a folding mechanism, and the folding controller is arranged to control the displacement of the folding mechanism along the radial direction of the folding steering wheel assembly.

[0037] Further, the telescopic mechanism comprises a telescopic adjusting motor and a first sliding block connected to the telescopic adjusting motor, the first sliding block is connected to the steering upper shaft, and the telescopic adjusting motor is arranged to drive the first sliding block to displace along the axial direction of the electrically adjustable steering upper shaft, thereby driving the telescopic displacement of the steering upper shaft.

[0038] Further, the angle adjusting mechanism comprises an angle adjusting motor and a connecting rod, the angle adjusting motor is arranged to drive the connecting rod to displace along the electrically adjustable steering upper shaft, thereby driving the displacement of the electrically adjustable steering upper shaft along the radial direction.

[0039] Further, the folding mechanism comprises a folding adjusting motor and a second sliding block, the folding adjusting motor is arranged to drive the second sliding block to displace along the folding steering wheel assembly, thereby driving the rotation of the steering wheel rim for folding.

[0040] The present application has the following advantages:

[0041] 1. The present application can accurately determine the vehicle state by combining multiple whole vehicle signals and diagnostic interfaces, select different control modes, and realize automatic or active folding and unfolding control of the folding steering wheel, thereby effectively increasing the space in the vehicle according to the user's needs.

[0042] 2. The folding steering wheel system of the present application comprises the adjustment of the radial direction and the axial direction of the steering upper shaft assembly and the radial direction adjustment of the steering wheel, thereby improving the foldable space. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a flowchart of the control method of the folding steering wheel;

[0044] Figure 2 is a flowchart of the output activation of the welcome mode;

[0045] Figure 3 is a flowchart of the output activation of the rest mode;

[0046] Figure 4 is a flowchart of the output activation of the folding zero position reset mode;

[0047] Figure 5is a system architecture diagram of a folding steering wheel;

[0048] Figure 6 is a structural schematic diagram of a control system of a folding steering wheel;

[0049] Figure 7 is a schematic diagram of a folding steering wheel folding and unfolding process;

[0050] Figure 8 is a structural schematic diagram of a telescopic mechanism;

[0051] Figure 9 is a structural schematic diagram of an angle adjusting mechanism;

[0052] Figure 10 is a structural schematic diagram of a folding mechanism.

[0053] Technical features and labels in the figures:

[0054] 1. A folding controller;

[0055] 2. An electrically adjusted steering shaft assembly; 21, a telescopic adjusting motor; 22, a first sliding block; 23, an angle adjusting motor; 24, a connecting rod;

[0056] 3. A folding steering wheel assembly; 31, a folding adjusting motor; 32, a second sliding block. DETAILED DESCRIPTION

[0057] The embodiments of the present application will be described below with reference to the accompanying drawings and preferred embodiments, and other advantages and effects of the present application can be understood by those skilled in the art from the contents disclosed in the present specification. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the present specification based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0058] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only show the components related to the present application in the diagrams, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in type, number and proportion, and the component layout type may also be more complex.

[0059] The present embodiment proposes a control method for a folding steering wheel, as shown in Figures 1-4 , comprising:

[0060] S1, signal acquisition, acquiring signals including power supply signals, gear signals, main driver seat personnel state signals, steering wheel folding state signals, steering wheel turning angle signals, door opening and closing signals, and drivable state signals;

[0061] S2, judging and outputting different control modes of the folding steering wheel based on the power supply signal, the gear signal, the driver seat personnel state signal, the steering wheel folding state signal, the steering wheel turning angle signal and the vehicle door opening and closing signal, the control modes including a welcome mode, a rest mode and a folding zero position reset mode;

[0062] As shown in the welcome mode judgment and output method shown in the welcome mode judgment and output method shown in Figure 2

[0063] S211, when the power supply signal is powered on and the driver seat personnel state signal is switched from occupied to unoccupied, continuously monitoring the vehicle state if the steering wheel folding state signal is normally unfolded;

[0064] S212, during the monitoring period, if the monitoring gear signal is P and the steering wheel turning angle is less than ±5°, it is judged that the vehicle meets the welcome mode activation condition, if the monitoring gear signal is not P or the steering wheel turning angle does not meet less than ±5°, it is judged that the vehicle does not meet the welcome mode activation condition and the process is ended;

[0065] S213, if the welcome mode activation condition is met and the vehicle door opening and closing signal is normally closed, the welcome mode is output;

[0066] S214, after the steering wheel is folded, the welcome mode stops outputting.

[0067] This method automatically judges whether the driver is in the vehicle through the driver seat personnel state signal and the vehicle door closing signal to control the folding of the steering wheel, which provides more space in the vehicle for the driver when getting on the vehicle, and when the steering wheel turning angle is not less than ±5°, it means that the folding steering wheel is not in the zero position and the folding mechanism cannot work, so the driver needs to manually participate in the steering wheel zero reset to fold it.

[0068] As shown in the welcome mode judgment and output method shown in the welcome mode judgment and output method shown in Figure 3

[0069] S221, collecting rest activation interface information, which can set the system state to rest activation state through diagnostic instructions;

[0070] S222, if the rest activation state setting is completed and the power supply signal is powered on, the gear signal is P, and the driver seat personnel state signal is occupied, it is judged that the rest mode activation condition is met, otherwise the process is ended;

[0071] S223, if the rest mode activation condition is met and the steering wheel turning angle is less than ±5°, the rest mode is output;

[0072] ​​S224, after the steering wheel is folded, the rest mode stops outputting.

[0073] The method actively folds the steering wheel through the rest activation interface, which is convenient for the driver to rest, wherein the steering wheel steering angle is not less than ±5°, which represents that the folded steering wheel is not in the return position, the folding mechanism cannot work, and the driver needs to manually participate in the steering wheel return to fold it.

[0074] As shown in the formula (1), the method for judging and outputting the folding zero position reset mode is: Figure 4

[0075] S231, collect folding zero position reset activation interface information, which can set the system state to a reset state through corresponding diagnostic instructions;

[0076] S232, if the reset state setting is completed, the power signal is powered on, the gear signal is P, and the steering wheel steering angle is less than ±5°, it is determined that the composite reset activation condition is met, and the folding zero position reset mode is output.

[0077] S233, after the folding zero position reset is completed, the folding zero position reset mode stops outputting.

[0078] S3, fold the steering wheel or reset the folding zero position according to the control mode;

[0079] The folding method is that the steering wheel folding mechanism and the steering upper shaft telescopic mechanism are both moved to their respective minimum limit, and the steering upper shaft angle adjusting mechanism is moved to the maximum limit. The folding zero position reset method is that when the system determines that the reset activation condition is met, the drive motor calculates the stroke, and after the system drive motor completes the stroke calculation, the controller can accurately control the drive motor according to the calibrated stroke. At this time, it indicates that the zero reset is completed, and the driver can independently reset the zero point in this way to deal with the position signal loss caused by the folding steering wheel breakpoint or reset it.

[0080] S4, after the steering wheel is folded, the steering wheel is unfolded based on the power signal, the steering wheel steering angle signal and the drivable state signal.

[0081] The determination method for unfolding the steering wheel based on the power signal, the steering wheel steering angle signal and the drivable state signal is:

[0082] S41, collect rest exit interface information or welcome exit interface information, which can set the system state to a rest exit state or a welcome exit state through diagnostic instructions;

[0083] S42, if the rest exit state or the welcome exit state is set and the steering wheel steering angle is less than ±5°, control the steering wheel to unfold.​

[0084] The method can actively control the direction through the rest exit interface information or the welcome exit interface information, so that the folded steering wheel is unfolded, and the driver's rest is ended or the driver is ready to drive.

[0085] If the steering wheel is folded according to the welcome mode, the welcome exit state is actively entered according to the welcome exit interface or is automatically entered according to the vehicle signal, and the method for automatically entering the welcome exit state according to the vehicle signal is that:

[0086] After the vehicle self-check is completed, if the drivable state signal is drivable and the steering wheel is in the folded state, the welcome exit state is set, and the process enters S42, if the drivable state signal is not drivable or the steering wheel is in the unfolded state, the process is ended.

[0087] The method can automatically control the steering wheel through the vehicle drivable state signal, so that the steering wheel is automatically folded when the driver gets off the vehicle, and the steering wheel is automatically unfolded when the driver gets on the vehicle and is ready to drive.

[0088] The embodiment also discloses a control system using the control method, as shown in the figure, comprising: Figures 5-10 A folding controller 1 outputs a motor driving instruction after judging that a control instruction needs to be executed through a whole vehicle signal;

[0089] An electrically adjusted steering upper shaft assembly 2 comprises a steering upper shaft, a telescopic mechanism and an angle adjusting mechanism arranged on the steering upper shaft, as shown in the figure, the folding controller 1 controls the angle adjusting mechanism and the telescopic mechanism to displace along the radial direction B and the axial direction A of the electrically adjusted steering upper shaft assembly 2 respectively;

[0090] Figure 7 A folding steering wheel assembly 3 is fixed to the electrically adjusted steering upper shaft assembly 2 and comprises a folding mechanism, as shown in the figure, the folding controller 1 controls the folding mechanism to displace along the radial direction C of the folding steering wheel assembly 3.

[0091] The telescopic mechanism comprises a telescopic adjusting motor 21 and a first sliding block 22 connected with the telescopic adjusting motor 21, the first sliding block 22 is connected with the steering upper shaft, and the telescopic adjusting motor 21 is used to drive the first sliding block 22 to displace in the axial direction of the electrically adjusted steering upper shaft assembly 2, so as to drive the steering upper shaft to telescope. Figure 7 The angle adjusting mechanism comprises an angle adjusting motor 23 and a second sliding block 24 connected with the angle adjusting motor 23, the second sliding block 24 is connected with the steering upper shaft, and the angle adjusting motor 23 is used to drive the second sliding block 24 to displace in the radial direction of the electrically adjusted steering upper shaft assembly 2, so as to drive the steering upper shaft to rotate.

[0092] Figure 8

[0093] Figure 9 ​​​​As shown, the angle adjustment mechanism includes an angle adjustment motor 23 and a connecting rod 24. The angle adjustment motor 23 is used to drive the connecting rod 24 to move on the upper shaft assembly 2 of the electric steering system, thereby causing the upper shaft assembly 2 of the electric steering system to move in the radial direction.

[0094] like Figure 10 As shown, the folding mechanism includes a folding adjustment motor 31 and a second slider 32. The folding adjustment motor 31 is used to drive the second slider 32 to move on the folding steering wheel assembly 3, thereby driving the steering wheel rim to rotate for folding.

[0095] As can be seen from the detailed description of the above embodiments, the present invention can accurately determine the vehicle status by combining multiple vehicle signals and control interfaces, select different control modes, and realize automatic or active folding and extension control of the folding steering wheel, effectively increasing the interior space according to user needs.

[0096] In addition, the folding steering wheel system of the present invention includes radial and axial adjustment of the upper steering shaft assembly and radial adjustment of the steering wheel, thereby increasing the foldable space.

[0097] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A control method of a folding steering wheel, characterized by, The method comprises the following steps: S1, signal acquisition, including power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal, door opening and closing signal, and drivable state signal; S2, based on the power signal, gear signal, main driver seat personnel state signal, steering wheel folding state signal, steering wheel steering angle signal and door opening and closing signal, the different control modes of the folding steering wheel are judged and output, the control modes including the welcome mode, the rest mode and the folding zero position reset mode; S3, the steering wheel is folded or the folding zero position is reset according to the control mode; S4, after the folding of the steering wheel is completed, the steering wheel is unfolded based on the power signal, steering wheel steering angle signal and drivable state signal; In the S2, the method for judging and outputting the welcome mode is: S211, when the power signal is powered on, the main driver seat personnel state signal is switched from someone to no one, and if the steering wheel folding state signal is normally unfolded, the vehicle state is continuously monitored; S212, during the monitoring period, if the monitoring gear signal is P gear and the steering wheel steering angle is less than ±5°, it is judged that the vehicle meets the welcome mode activation condition, if the monitoring gear signal is not P gear or the steering wheel steering angle does not meet less than ±5°, it is judged that the vehicle does not meet the welcome mode activation condition and the process is ended; S213, if the welcome mode activation condition is met and the door opening and closing signal is normally closed, the welcome mode is output; S214, after the folding of the steering wheel is completed, the welcome mode stops output; The method for judging and outputting the rest mode is: S221, the rest activation interface information is collected, the interface can set the system state to the rest activation state through the diagnostic instruction; S222, if the rest activation state setting is completed and the power signal is powered on, the gear signal is P gear and the main driver seat personnel state signal is someone, it is judged that the rest mode activation condition is met, otherwise the process is ended; S223, if the rest mode activation condition is met and the steering wheel steering angle is less than ±5°, the rest mode is output; S224, after the folding of the steering wheel is completed, the rest mode stops output; The method for judging and outputting the folding zero position reset mode is: S231, the folding zero position reset activation interface information is collected, the interface can set the system state to the reset state through the diagnostic instruction; S232, if the reset state setting is completed and the power signal is powered on, the gear signal is P gear and the steering wheel steering angle is less than ±5°, it is judged that the reset activation condition is met, and the folding zero position reset mode is output; S233, after the folding zero position reset is completed, the folding zero position reset mode stops output.

2. The control method of the folding steering wheel according to claim 1, characterized in that, In the S3, the steering wheel is folded according to the control mode, and the folding method is: The steering wheel folding mechanism and the steering upper shaft telescopic mechanism are both moved to the respective minimum limit, and the steering upper shaft angle adjusting mechanism is moved to the maximum limit.

3. The control method of the folding steering wheel according to claim 1, characterized by, In the S4, the judgment method for unfolding the steering wheel based on the power signal, steering wheel steering angle signal and drivable state signal is: S41, collect the rest exit interface information or the welcome exit interface information, the interface can set the system state to the rest exit state or the welcome exit state through the diagnostic instruction; S42, if the rest exit state or the welcome exit state is set and the steering wheel steering angle is less than ±5°, control the steering wheel to unfold.

4. The control method of the folding steering wheel according to claim 3, characterized in that, If the steering wheel is folded according to the welcome mode, the welcome exit state is automatically entered according to the welcome exit interface or the welcome exit state is automatically entered according to the vehicle signal, and the method for automatically entering the welcome exit state according to the vehicle signal is: After the vehicle power-on self-test is completed, if the drivable state signal is drivable and the steering wheel is in the folded state, the welcome exit state is set, and S42 is entered, if the drivable state signal is not drivable or the steering wheel is in the unfolded state, the process is ended.

5. A control system using the control method according to any one of claims 1 to 4, characterized by It comprises: A folding controller (1) which outputs motor driving instructions after determining that control instructions need to be executed through vehicle signals; An electric steering upper shaft assembly (2) comprising a steering upper shaft, a telescopic mechanism and an angle adjusting mechanism arranged on the steering upper shaft, the folding controller (1) controls the angle adjusting mechanism and the telescopic mechanism to displace along the radial direction and the axial direction of the electric steering upper shaft assembly (2) respectively; A folding steering wheel assembly (3) which is fixed to the electric steering upper shaft assembly (2) and comprises a folding mechanism, the folding controller (1) controls the folding mechanism to displace along the radial direction of the folding steering wheel assembly (3).

6. The control system of claim 5, wherein, The telescopic mechanism comprises a telescopic adjusting motor (21) and a first sliding block (22) connected with the telescopic adjusting motor (21), the first sliding block (22) is connected with the steering upper shaft, and the telescopic adjusting motor (21) is used to drive the first sliding block (22) to displace axially in the electric steering upper shaft assembly (2), thereby driving the steering upper shaft to telescope.

7. The control system of claim 5, wherein, The angle adjusting mechanism comprises an angle adjusting motor (23) and a connecting rod (24), the angle adjusting motor (23) is used to drive the connecting rod (24) to move in the electric steering upper shaft assembly (2), thereby driving the electric steering upper shaft assembly (2) to displace in the radial direction.

8. The control system of claim 5, wherein, The folding mechanism comprises a folding adjusting motor (31) and a second sliding block (32), the folding adjusting motor (31) is used to drive the second sliding block (32) to move in the folding steering wheel assembly (3), thereby driving the steering wheel rim to rotate and fold.

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