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CN-122014065-A - Anti-pinch system for front cover of automobile, control method and automobile

CN122014065ACN 122014065 ACN122014065 ACN 122014065ACN-122014065-A

Abstract

The invention relates to the technical field of automobile safety, in particular to an automobile front cover anti-clamping system, a control method and an automobile. Comprises a front cover, a lock body assembly, a driving mechanism, a sensing unit and an electronic control unit; the electronic control unit is respectively and electrically connected with the sensing unit, the driving mechanism and the attraction motor of the lock body assembly. The electronic control unit is configured to acquire a gap value detected by the gap sensor after receiving a closing instruction, start the attraction motor to execute locking when the gap value is smaller than or equal to a preset threshold value, control the driving mechanism to execute ejection action to adjust the front cover position when the gap value is larger than the preset threshold value, and start the attraction motor to execute locking when the gap value is smaller than or equal to the preset threshold value again after adjustment. Through the logic of aligning first and then attracting, the potential safety hazard of the clamping hand in the half-locking state is eliminated, and the appearance leveling degree of the front cover after closing is ensured.

Inventors

  • YU KESHENG
  • GAO XIAOYAN

Assignees

  • 奇瑞汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260402

Claims (10)

  1. 1. An automotive front cover anti-pinch system, comprising: the lock body assembly (2) is arranged in the vehicle body and used for locking the front cover (1); the driving mechanism (3) is arranged in the vehicle body and is used for adjusting the position of the front cover (1); the sensing unit comprises a gap sensor for detecting a gap value between the front cover (1) and a matching surface of the vehicle body; The electronic control unit is electrically connected with the sensing unit, the driving mechanism (3) and the attraction motor of the lock body assembly (2) respectively; The electronic control unit is configured to start the actuation motor to execute locking when the gap value detected by the gap sensor is smaller than or equal to a preset threshold value after receiving a closing instruction, and to control the driving mechanism (3) to act to adjust the position of the front cover (1) when the gap value is larger than the preset threshold value.
  2. 2. The automotive front cover anti-pinch system according to claim 1, characterized in that the driving mechanism (3) comprises: The bracket (4) is fixed on the side of the lock body assembly (2); the driving motor (5), the said driving motor (5) is fixed on said support (4); the transmission gear set is in transmission connection with the output end of the driving motor (5); The screw rod is rotatably arranged on the bracket (4) and is in transmission connection with the output end of the transmission gear set; The sliding block (7) is in threaded fit with the screw rod and can move linearly along the screw rod; When the gap value detected by the gap sensor is larger than the preset threshold value, the electronic control unit controls the driving motor (5) to rotate positively, and the sliding block (7) is driven to extend to jack up the front cover (1).
  3. 3. The automotive front cover anti-pinch system of claim 2, wherein the drive gear set comprises: A first-stage intermediate gear (8), wherein the first-stage intermediate gear (8) is connected with a motor shaft of the driving motor (5); and a second-stage output gear (9), the second-stage output gear (9) is connected with the screw rod, and the second-stage output gear (9) is meshed with the first-stage intermediate gear (8).
  4. 4. The anti-pinch system for a front cover of an automobile according to claim 2, wherein the screw is a trapezoidal threaded screw (6), and the slider (7) comprises: A body; and the nut is embedded in the body and is in threaded fit with the screw rod.
  5. 5. The automotive front cover anti-pinch system according to claim 2, characterized in that the drive mechanism (3) further comprises: The buffer cushion is arranged at the top of the sliding block (7); and/or a limit boss arranged at the top of the sliding block (7), wherein the limit boss is used for pushing a ratchet wheel (10) in the lock body assembly (2).
  6. 6. The anti-pinch system for a front cover of an automobile according to claim 2, wherein the preset threshold value is 1mm, and the electronic control unit controls the driving motor (5) to drive the extension amount of the extension of the sliding block (7) to be 0.5-3mm.
  7. 7. An automobile front cover anti-pinch control method for controlling the automobile front cover anti-pinch system according to any one of claims 1 to 6, comprising the steps of: responding to a closing instruction of the front cover (1), and acquiring a real-time gap value between the front cover (1) and a matching surface of the vehicle body; Judging whether the real-time gap value is smaller than or equal to a preset threshold value; If yes, directly starting an actuation motor of the lock body assembly (2) to execute locking; If not, the driving mechanism (3) is controlled to execute ejection action to adjust the position of the front cover (1) until the real-time gap value is smaller than or equal to the preset threshold value, and then the suction motor is started to execute locking.
  8. 8. The automotive front cover anti-pinch control method according to claim 7, characterized in that the step of controlling the driving mechanism (3) to perform an ejection action to adjust the position of the front cover (1) includes: the driving motor (5) of the driving mechanism (3) is controlled to rotate positively, and the sliding block (7) is driven to extend out through the transmission gear set and the lead screw, so that the front end of the front cover (1) is jacked up by 1-3mm; controlling the driving motor (5) to rotate reversely to retract the sliding block (7), and lowering the front cover (1) under the action of gravity; And continuously monitoring the real-time gap value in the descending process, and stopping ejection action when the real-time gap value is smaller than or equal to a preset threshold value again.
  9. 9. The method for controlling a front cover of an automobile according to claim 7, further comprising an appearance trimming step after the step of starting the attraction motor to perform locking: acquiring a static gap value between the front cover (1) and the matching surface of the vehicle body again; If the static gap value is larger than the design tolerance, the driving motor (5) of the driving mechanism (3) is controlled to rotate forward, the front cover (1) is jacked up by 0.5-1mm through the sliding block (7), the front cover (1) is enabled to be flush with the matching surface of the vehicle body, and then the driving motor (5) is controlled to be powered off.
  10. 10. An automobile comprising the automobile front cover anti-pinch system according to any one of claims 1 to 6.

Description

Anti-pinch system for front cover of automobile, control method and automobile Technical Field The invention relates to the technical field of automobile safety, in particular to an automobile front cover anti-clamping system, a control method and an automobile. Background In the closing process of the front cover of the traditional automobile, a half-lock detection logic is generally adopted, namely when the lock catch enters the lock body to reach a half-lock position, the suction motor is started, and the front cover is pulled into the full lock. The mode has potential safety hazards that a large gap (usually larger than 5 mm) is usually formed between the front cover and the front bumper in a half-locking state, so that fingers can be accommodated sufficiently, and at the moment, if the fingers are directly attracted, a hand clamping accident is very easy to occur. In addition, there may be a problem in that the front cover is tilted on one side and is not flush with the bumper after being closed due to manufacturing tolerance or assembly error, affecting the external appearance. In the prior art, although a scheme for realizing anti-clamping through torque detection exists, only the generated clamping force can be identified, the risk of clamping hands caused by early suction cannot be fundamentally avoided, and the alignment problem after the front cover is closed cannot be solved. Disclosure of Invention The invention aims to provide an anti-clamping system for a front cover of an automobile, a control method and the automobile, and aims to solve the technical problems that in the prior art, the safety hidden danger of a clamping hand is caused by early suction when the front cover of the automobile is closed, and the appearance is affected due to the fact that the front cover is not flush with a bumper after the front cover is closed. In a first aspect, the present invention provides an automotive front cover anti-pinch system comprising: The lock body assembly is arranged in the vehicle body and used for locking the front cover; the driving mechanism is arranged in the vehicle body and used for adjusting the position of the front cover; The sensing unit comprises a gap sensor for detecting a gap value between the front cover and the matching surface of the vehicle body; the electronic control unit is electrically connected with the sensing unit, the driving mechanism and the attraction motor of the lock body assembly respectively; The electronic control unit is configured to start the actuation motor to execute locking when the gap value detected by the gap sensor is smaller than or equal to a preset threshold value after receiving a closing instruction, and to control the driving mechanism to act to adjust the position of the front cover when the gap value is larger than the preset threshold value. In an alternative embodiment, the drive mechanism includes: The bracket is fixed on the side of the lock body assembly; The driving motor is fixed on the bracket; the transmission gear set is in transmission connection with the output end of the driving motor; The screw rod is rotatably arranged on the bracket and is in transmission connection with the output end of the transmission gear set; the sliding block is in threaded fit with the screw rod and can move linearly along the screw rod; when the gap value detected by the gap sensor is larger than the preset threshold value, the electronic control unit controls the driving motor to rotate positively to drive the sliding block to extend out so as to jack up the front cover. In an alternative embodiment, the drive gear set includes: The first-stage intermediate gear is connected with a motor shaft of the driving motor; And the second-stage output gear is connected with the lead screw and meshed with the first-stage intermediate gear. In an alternative embodiment, the screw is a trapezoidal thread screw, and the slider comprises: A body; and the nut is embedded in the body and is in threaded fit with the screw rod. In an alternative embodiment, the driving mechanism further comprises: The buffer cushion is arranged at the top of the sliding block; and/or, set up in spacing boss at slider top, spacing boss is used for promoting the inside ratchet of lock body assembly. In an alternative embodiment, the preset threshold value is 1mm, and the electronic control unit controls the driving motor to drive the extending amount of the sliding block to be 0.5-3mm. In a second aspect, the present invention provides an anti-pinch control method for a front cover of an automobile, for controlling the anti-pinch system for a front cover of an automobile according to any one of the foregoing embodiments, the anti-pinch control method for a front cover of an automobile comprising the steps of: responding to a front cover closing instruction, and acquiring a real-time gap value between a front cover and a vehicle body matching surface; Judging whether the real-time gap v