Motor Vehicle Door Opening Device Slope Safety Control
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Solution Overview
Problem
Existing motor vehicle door opening devices fail to ensure safe and secure operation, particularly on sloping roads, as they may unintentionally open beyond a graspable position, posing safety risks.
Innovation Solution
An electrically driven opening device with a gear mechanism and sensor system that holds the door in a position allowing manual opening, preventing unintended further opening, and integrating a locking mechanism for secure holding and control, ensuring the door does not exceed the vehicle's width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the door is opened electrically by the opening device, then the door can be moved into an open position, but the door may unintentionally open beyond a graspable position especially on sloping roads
Solution Approach 1:
A sensor detects the position of the actuating means and sends feedback signals to the control unit. The control unit continuously monitors the door opening position and automatically stops the drive when the door reaches a predefined safe opening angle, preventing unintended further opening even on sloping roads.
Solution Approach 2:
The control unit is programmed with predetermined safety parameters and stopping positions before operation begins. When the sensor detects that the door has reached the predefined opening angle, the control unit immediately counteracts any continued opening motion by stopping the drive, thus preventing the harmful effect of excessive opening in advance.
2Ease of operation
If the opening device allows full door opening, then the operator can access the vehicle, but safety risks increase on sloping surfaces
Solution Approach 1:
The opening device provides different opening extents for different operating conditions. On sloping roads, the door is automatically limited to a smaller safe opening angle that still allows operator access while preventing hazardous excessive opening. On level surfaces, the door can open fully for complete accessibility.
3Reliability
If a sensor system is added to control door opening position, then safety is improved, but device complexity increases
Solution Approach 1:
The sensor serves multiple functions: it detects the position of the actuating means, determines when the door has reached the predefined opening angle, and provides feedback for the control unit to stop the drive. This multi-functional sensor reduces the need for additional separate components, thereby limiting the increase in overall system complexity.
Data Source
AI summary
An opening device for a motor vehicle door element having an electric drive and an actuating means, wherein the actuating means is adjustable by means of the drive and a gear mechanism arranged between the actuating means and the drive, with the result that a movement of the door element can be made possible, and a sensor for detecting a force on the opening device, wherein the door element can be held by way of the actuating means.