Vehicle Door Control Device Position Correction
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Solution Overview
Problem
In vehicles with hinged doors, the reaction force from weather strips and variations in assembly accuracy can cause doors to be drawn beyond the fully-closed position, leading to discomfort due to abnormal noise and impaired appearance, as the door may not return to its normal position.
Innovation Solution
A vehicle door control device that includes a latch mechanism shifting between full-latching, half-latching, and unlatching states, with position correction and braking controls to manage door positioning and movement, using regenerative braking and controlled motor forces to prevent door displacement and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power supply to the motor is stopped after the door lock device shifts from unlatching state to half-latching state, then the closing operation ends and the door lock engages, but the door may move in the opening direction due to weather strip reaction force causing abnormal noise and discomfort
Solution Approach 1:
The control device applies a braking force to the door before the door lock device completes the transition from half-latching to full-latching state. This preliminary counteracting force prevents the door from moving in the opening direction due to weather strip reaction force, thereby eliminating abnormal noise and vibration while maintaining efficient closing operation
Solution Approach 2:
The control device detects the state of the door lock device and adjusts motor control accordingly. When the door lock device shifts from unlatching to half-latching state, the control device activates braking control to counteract weather strip reaction force, creating a feedback-based solution that prevents harmful vibrations and noise
2Reliability
If the door is drawn to the vehicle inner side beyond the normal fully-closed position due to wear amount of weather strip or assembly accuracy variation, then the door may not return to normal position and distortion may occur, but no active correction mechanism is provided
Solution Approach 1:
The control device executes position correction control after the door lock device shifts from half-latching to full-latching state. This preliminary correction action adjusts the door position before the door is fully secured, preventing distortion and ensuring the door returns to its normal fully-closed position even when affected by weather strip wear or assembly variations
Solution Approach 2:
The control device monitors the door lock device state and implements position correction when the door is drawn beyond the normal fully-closed position. This feedback-based correction ensures reliable door positioning and prevents distortion by actively adjusting the door position after latching engagement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces occupant discomfort by ensuring the door returns to its normal fully-closed position and prevents abnormal noise and distortion, maintaining the vehicle's appearance and operational smoothness.
Implementation Method 1
a drive device including a motor configured to drive the door to open and close
Implementation Method 2
braking control of applying a braking force to the door by regenerative braking action of the motor
Data Source
AI summary
A vehicle door control device controlling a motor and a door lock device of a door. During a closing operation of the door based on a closing operation command signal, the motor is driven to cause the door to perform the closing operation until shift of a latch mechanism from the unlatching state to the half-latching state is detected. The latch mechanism is shifted from the half-latching state to the full-latching state by starting driving of the door lock device simultaneously with or before or after completion of the closing operation of the door. When the shift of the latch mechanism from the half-latching state to the full-latching state is detected, position correction control of correcting a position of the door by driving the motor such that a force in an opening direction acts on the door is executed.