CN-121989859-A - Airbag protection system based on steer-by-wire steering wheel and control method thereof

Abstract

The invention provides an air bag protection system based on a steering wheel by wire, which comprises a sensing unit, a control unit and an execution unit which are integrated in an automobile instrument board, wherein the sensing unit is connected with the control unit, the control unit is connected with the execution unit, the execution unit adopts a double-stage double-cavity air bag, the invention also provides a control method of the air bag protection system based on the steering wheel by wire, when the steering wheel is in an operation area of a driver, a double-stage point explosion generator discharges air in a single-point explosion manner, the air bag is unfolded, the outline of the air bag is covered on the steering wheel, when the steering wheel is in a folding hidden state, the two-stage point explosion generator is used for two-stage two-point explosion deflation, the air bag is filled between a driver and an instrument board, and an original steering wheel operation area is filled, so that the steering wheel is suitable for the foldable and hidden steering wheel, secondary damage to the driver caused by structural members under the folding hidden state of the steering wheel can be avoided, the problem of no steering wheel support is solved, and the safety is improved.

Inventors

• LIU LEI
• SHEN CHAO
• LI YANYAN
• WANG JIANPING
• ZHANG YUNFENG
• XIAO PING
• JIN HAITAO

Assignees

• 安徽工程大学

Dates

Publication Date

20260508

Application Date

20260310

Claims (10)

1. 1. The airbag protection system based on the steer-by-wire steering wheel is characterized by comprising a sensing unit, a control unit and an execution unit (10) which are integrated in an automobile instrument panel, wherein the sensing unit is connected with the control unit, and the control unit is connected with the execution unit (10).
2. 2. The steering wheel-by-wire based airbag protection system according to claim 1, wherein the execution unit (10) comprises a dual-stage point bursting generator (11) and a dual-chamber airbag (12) connected with the dual-stage point bursting generator (11), wherein a second chamber airflow channel is arranged between a first chamber (121) and a second chamber (122) of the dual-chamber airbag (12), and the second chamber airflow channel is connected with an airflow channel on-off component (13).
3. 3. The steering wheel-by-wire based airbag protection system according to claim 2, wherein the air flow passage on-off assembly (13) comprises an on-off pull strap (131) and a PIN PULLER part (132) connected with the on-off pull strap (131), one end of the on-off pull strap (131) is connected with an air bag outside exhaust hole, an upper sheet and a lower sheet are limited to be connected by a middle section of the on-off pull strap (131), a pull ring is arranged at the other end of the on-off pull strap (131), and the PIN PULLER part (132) is connected with the pull ring.
4. 4. A steering wheel-by-wire based airbag protection system according to claim 3, wherein the dual stage point burst generator (11) selectively enables single stage single point burst deflation or dual stage dual point burst deflation providing an adapted gas pressure for a dual chamber airbag.
5. 5. The steering-by-wire airbag protection system of claim 4, wherein the dual-stage point burst generator (11) single-stage burst deflates when the steering wheel is in the driver operating region, and the first chamber (121) of the dual-chamber airbag (12) deploys, isolating between the driver and the steering wheel.
6. 6. The steering-by-wire airbag protection system of claim 4, wherein the dual stage point burst generator (11) dual stage burst vent, PIN PULLER unit (132) removes the restraint of the on-off drawstring (131) when the steering wheel is in the folded state, the second chamber airflow path is open, the first chamber (121) and the second chamber (122) are deployed, the second chamber (122) fills the original steering wheel operating area, and the dual chamber airbag (12) fills between the driver and the dashboard.
7. 7. The steering-by-wire airbag protection system of claim 4, wherein the dual-cavity airbag (12) is manufactured using an OPW process or a CSS process.
8. 8. The steering-by-wire airbag protection system of claim 7, wherein the sensing unit comprises a steering wheel position sensor, a driver position sensor and a collision sensor, the steering wheel position sensor is a displacement sensor and an angle sensor for acquiring spatial position coordinates or folding and unfolding angle information of the steering wheel and an auxiliary mechanism thereof in real time, the driver position sensor is an infrared sensor, an image sensor or a pressure sensor for dynamically capturing the sitting posture, the trunk position and the relative distance information of the driver to an instrument panel, and the collision sensor is an acceleration sensor, a pressure sensor or an inertial measurement unit for detecting the intensity of a vehicle collision, the collision direction and the time point information of the occurrence of the collision.
9. 9. The steering wheel-by-wire based airbag protection system of claim 7, wherein the control unit includes an airbag ECU and a whole vehicle ECU connected to the airbag ECU, the airbag ECU being connected to the sensing unit.
10. 10. A control method of an air bag protection system based on a steering wheel by wire according to any one of claims 1 to 9 is characterized by comprising the following steps of S1, collecting position information of the steering wheel and an auxiliary mechanism thereof, driver position information and collision working condition information in real time by a sensing unit, transmitting the collected information to a control unit in real time, S2, analyzing the received information by the control unit, judging whether the steering wheel is in a traditional driver operation design position area or not, S3, if the judgment result is yes, sending a single-stage ignition instruction to an execution unit by the control unit, enabling a double-stage ignition generator to only work in a single stage mode, enabling a PIN PULLER component to keep a locking state, enabling a pull belt to limit a second chamber air flow channel, enabling only a first chamber to inflate and expand, supporting an air bag by the steering wheel, and achieving buffer protection of the driver, and S4, if the judgment result is no, enabling the double-stage ignition generator to work in a double stage ignition, releasing the limitation of a pull belt by a PIN PULLER component, unlocking and releasing a second chamber air flow channel, enabling the air bag to completely inflate and expanding by the double-chamber structure to support the steering wheel to avoid secondary defects of the driver.

Description

Airbag protection system based on steer-by-wire steering wheel and control method thereof Technical Field The invention belongs to the field of automobile safety airbags, and particularly relates to an airbag protection system based on a steer-by-wire steering wheel and a control method thereof. Background Under the background that the automobile intelligently evolves to the L3 level and above automatic driving depth, a steer-by-wire (Steer by Wire, SBW) system becomes a core configuration of an intelligent automobile chassis framework by virtue of the core advantages of canceling mechanical steering connection and realizing steering control electronization, and a foldable and hidden steering wheel is used as a matched cabin part of the SBW system, and is folded and stored in an automatic driving mode to effectively release the front operation area space of a cabin, optimize the leg movement range of an occupant and the visual permeability of the cabin, so that the intelligent cabin experience is improved. However, the design of the foldable and hidden steering wheel has obvious pain points on the collision safety layer, the operation area released after the steering wheel is folded leads to the redundancy of the buffer space between a driver and the front interior trim part, and effective energy absorption cannot be formed during collision; meanwhile, in order to meet the requirements of installation fixation of the steering wheel and movement support of the folding mechanism, the original steering wheel installation position is required to be provided with parts such as a rigid installation bracket, a folding transmission base, a fixed locking structure and the like, and the parts are usually made of high-strength metal or hard engineering plastics for ensuring structural strength and movement reliability and are mostly directly exposed on a collision path in front of a driver due to the limitation of cabin space layout. Under the condition of no steering wheel shielding protection, the driver can easily directly impact the hard structure in a forward displacement manner during collision, the high hardness characteristic of the hard structure can not realize energy absorption, and the direct impact injury of the chest, the abdomen and the upper limbs can be easily caused, so that a typical secondary collision risk is formed. Therefore, in order to improve or solve at least one of the problems, an air bag protection system based on a steer-by-wire steering wheel and a control method thereof are provided, which can be suitable for foldable and hidden steering wheels, can avoid secondary damage to a driver caused by structural members when the steering wheel is in a folded and hidden state, can solve the problem of no steering wheel support, and are beneficial to improving the safety. Disclosure of Invention The present invention has been made to solve the above problems, and an object of the present invention is to provide an airbag protection system based on a steer-by-wire steering wheel and a control method thereof, which are applicable to foldable and hidden steering wheels, can avoid secondary damage to a driver caused by structural members when the steering wheel is in a folded and hidden state, can compensate for the problem of no steering wheel support, and are beneficial to improving safety, and in order to achieve the above objects, the present invention adopts the following technical scheme: The invention provides an air bag protection system based on a steer-by-wire steering wheel, which has the characteristics that the system comprises a sensing unit, a control unit and an execution unit which are integrated in an automobile instrument panel, wherein the sensing unit is connected with the control unit, and the control unit is connected with the execution unit. The air bag protection system based on the steering wheel by wire can be characterized in that the execution unit comprises a double-stage ignition generator and a double-cavity air bag connected with the double-stage ignition generator, a second cavity air flow channel is arranged between a first cavity and a second cavity of the double-cavity air bag, and the second cavity air flow channel is connected with an air flow channel on-off component. The air bag protection system based on the steering wheel by wire can be characterized in that the air flow channel on-off assembly comprises an on-off pull belt and a PIN PULLER component connected with the on-off pull belt, one end of the on-off pull belt is connected with an air bag outside exhaust hole, the middle section of the on-off pull belt limits the connection of an upper piece and a lower piece, the other end of the on-off pull belt is provided with a pull ring, and the PIN PULLER component is connected with the pull ring. The airbag protection system based on the steer-by-wire steering wheel can also have the characteristic that the two-stage point burst generator can selectively rea