Motorized Flap Holding via Control Loop
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Solution Overview
Problem
Existing methods for motorized flap arrangements in motor vehicles require high mechanical complexity to prevent undesired adjustment movements, especially when the drive arrangement is reversible and designed to hold flaps in intermediate positions.
Innovation Solution
A control arrangement that detects predetermined flap deflections, particularly due to gravity, from a de-energized intermediate position, and activates a holding control loop to control the reversible drive assembly, thereby holding the flap in position without additional mechanical measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical brake is used to prevent undesired adjustment movements of the flap, then the flap can be held in intermediate positions, but the mechanical complexity of the drive arrangement increases
Solution Approach 1:
The patent replaces the mechanical brake system with an electrical control solution. The control arrangement monitors flap position and uses the reversible drive assembly's electrical control capabilities to maintain the flap in intermediate positions, eliminating the need for mechanical braking components while achieving the same holding function.
Solution Approach 2:
The patent changes the control parameter from mechanical force application to electrical signal control. By monitoring flap position parameters and adjusting drive assembly electrical signals dynamically, the system achieves precise position holding without mechanical intervention, reducing structural complexity.
2Ease of operation
If a reversible drive arrangement is used to allow manual adjustment of the flap, then ease of operation is improved, but gravitational lowering of the flap from intermediate positions occurs
Solution Approach 1:
The control arrangement continuously monitors the flap's actual position and compares it with the desired intermediate position. When gravitational deviation is detected, the system automatically activates the drive assembly to correct the position, creating a closed-loop feedback system that maintains stability while preserving manual adjustability.
Solution Approach 2:
The system proactively compensates for gravitational effects before significant position deviation occurs. By continuously monitoring and applying corrective electrical signals to the drive assembly, the flap is maintained in the intended intermediate position, preventing gravitational lowering while allowing manual operation.
Data Source
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AI summary
The invention relates to a method for the operation of a motorized flap arrangement (1) of a motor vehicle (2), wherein the flap arrangement (1) has a flap (4) which is pivotable with respect to a motor vehicle body (3), wherein the flap arrangement (1) has a back-driveable drive arrangement (5) for the motorized adjustment of the flap (4) and a control arrangement (6) for controlling the drive arrangement (5). It is proposed that an, in particular gravitationally induced, predetermined flap deflection is detected by means of the control arrangement (6) from a de-energized intermediate position of the flap (4) in a monitoring routine (7) and, in response to the detection of the predetermined flap deflection, a holding routine (8) is triggered in which the drive arrangement (5) is adjusted to a flap-holding position in a holding control circuit.