Vehicle Electric Door Latch Control With Emergency Lever Backup
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Solution Overview
Problem
Existing electric door latches in vehicles face issues with door opening during vehicle travel when communication errors occur or in collision scenarios, and they fail to function properly when vehicle communication is unavailable.
Innovation Solution
A method to control the electric latch by determining vehicle state and activating an emergency lever when communication errors or collisions are detected, allowing manual operation of the latch to open the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electric door latch operates based on simple button operation, then the convenience of operation is improved, but the reliability of door locking/unlocking control deteriorates when communication errors occur
Solution Approach 1:
The control unit determines vehicle speed and operational state before executing door opening commands. By checking whether the vehicle is stopped or moving ahead before allowing door opening, the system prevents premature or unsafe door operations that could occur with simple button presses alone
Solution Approach 2:
The system continuously monitors vehicle speed and operational state through communication with the vehicle's control unit. This feedback mechanism allows the door latch control to adapt its behavior based on current vehicle conditions, preventing operation errors while maintaining convenience
2Stability of the object's composition
If the electric door latch requires communication availability for operation, then the stability of door control is improved, but the accessibility of door opening deteriorates when communication fails
Solution Approach 1:
The system extracts the essential safety function (vehicle speed determination) from the communication-dependent control system. When communication fails, the door latch control unit independently determines whether door opening is safe by checking if the vehicle is stopped, separating this critical function from the communication system
Solution Approach 2:
The door latch control unit performs self-determination of door opening conditions by directly checking vehicle speed and operational state. This self-service capability allows the system to maintain door opening functionality even when external communication systems fail
3Ease of operation
If the electric door latch allows door opening when vehicle state is undetermined, then the accessibility is improved, but the safety deteriorates as the door may open during vehicle travel
Solution Approach 1:
The control unit determines vehicle speed and operational state before executing door opening commands. By checking whether the vehicle is stopped or moving ahead before allowing door opening, the system prevents premature or unsafe door operations that could occur with simple button presses alone
Solution Approach 2:
The system preemptively prevents harmful door opening during vehicle travel by checking operational state before allowing door opening. When the vehicle is determined to be moving ahead, the system actively prevents door opening, countering the potential harmful action before it can occur
Data Source
AI summary
The present disclosure provides a method of controlling an electric latch, installed on a door of a vehicle, to lock or unlock the door by being operated by a motor, the method comprising operating an inner button configured to enable a passenger to get off the vehicle; determining whether there is an error in a state where the vehicle has been started; determining whether a vehicle speed of the vehicle is input to a control unit; and, when the vehicle speed is not input, inducing an emergency lever to guide a use of the emergency lever.