Vehicle Door Control System for Jamming Prevention

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Solution Overview

Problem

Conventional power slide door systems require excessive user effort in cold weather or poorly built conditions, and manual operation to disengage the door lock is inconvenient and difficult, leading to incomplete power assist operation.

Innovation Solution

A vehicle door control system that automatically disengages the door lock using an electrical mechanism when the door handle is operated, and initiates power assist opening after a preset time if the door does not move, ensuring the door can be opened or closed with reduced user effort even in adverse conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual operation is required to move the door to a preset position before power assist starts, then the power assist mechanism can be activated, but excessive user effort is required especially in cold weather or poorly built conditions

Engineering Contradiction:

Improvedoor operation effortVSAvoidpower assist activation reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces the mechanical switch mechanism with an electrical detection system. A detection switch mounted on the door body electrically detects door handle operation, triggering the latch releasing actuator and power assist mechanism without requiring mechanical force to move the door to a preset position. This electrical detection system eliminates the need for manual positioning while maintaining reliable activation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service operation where the door handle itself serves as the trigger. When the user operates the door handle, the detection switch automatically detects this operation and initiates the power assist sequence, including latch release and motor activation, without requiring the user to perform additional manual positioning actions.

Inventive Principle:

Principle #25Self-service

2Reliability

If a detection switch is added to detect door handle operation for automatic latch release, then power assist can be activated more reliably, but the system complexity increases

Engineering Contradiction:

Improvepower assist activation reliabilityVSAvoidcontrol system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The detection switch serves multiple functions: it detects door handle operation to trigger latch release, activates the power assist mechanism, and prevents erroneous operation through timing judgment. This multi-functional component eliminates the need for separate sensors and control circuits for each function, reducing overall system complexity while improving reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines the detection switch, latch releasing actuator control, and power assist activation into a single integrated control sequence. The detection switch output directly controls both the latch motor and power assist motor through unified control logic, merging multiple control functions into one coordinated system rather than separate independent mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If the door lock disengagement is achieved mechanically through door handle operation, then the system is simpler, but it requires excessive manual force in adverse conditions and may not disengage reliably

Engineering Contradiction:

Improvesystem simplicityVSAvoiddoor handle operation ease

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical disengagement mechanism with an electrical actuation system. The detection switch mounted on the door body electrically activates the latch releasing actuator, which uses a motor to disengage the lock. This eliminates the need for mechanical force transmission through the door handle while improving ease of operation and reliability in adverse conditions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8567129B2Vehicle door control method and system therefor

Publication Date: 2013.10.29 AISIN SEIKI KK

AI summary

A vehicle door control method includes operating a vehicle door handle to disengage a door lock device of a vehicle door, beginning to count time upon the operation of the door handle, if the vehicle door has moved from a fully closed position after the door lock device has been disengaged, operating a power assist mechanism to move the vehicle door in an opening direction, if the vehicle door has not moved from the fully closed position, operating the power assist mechanism to urge the vehicle door to move in the opening direction, if the vehicle door moves while being urged by the power assist mechanism, the operation of the power assist mechanism is continued to move the vehicle door in the opening direction, if the vehicle door does not move while being urged by the power assist mechanism, the power assist mechanism is operated in a direction which urges the vehicle door to move to the fully closed position.