Vehicle Doorhandle Assembly Sensorless Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle door handle assemblies require multiple sensors for detecting user presence and action, leading to complex designs and higher costs.
Innovation Solution
A door handle assembly that uses a mechanical coupling between the vehicle door handle and electric motor, where user-applied external forces set the motor in rotation, allowing the control unit to interpret the rotation and control locking or unlocking without the need for force or pressure sensors, and simulates haptics through predefined force/travel characteristic curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors (pressure sensor, force sensor) are used to detect user presence and action, then the detection accuracy and reliability are improved, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines the detection functions of pressure sensors and force sensors into a single sensor that can detect both vertical pressure (for presence detection) and horizontal force (for action detection). This merging of multiple sensing capabilities into one component reduces device complexity while maintaining detection reliability across different operational states
Solution Approach 2:
The single sensor is designed to perform multiple detection functions: detecting user presence through vertical pressure, detecting user pulling action through horizontal force, and determining the direction of the pulling force. This multi-functional sensor eliminates the need for separate pressure and force sensors, reducing overall system complexity
2Difficulty of detecting and measuring
If multiple sensors are installed in the door handle assembly, then the sensing capability is improved, but the manufacturing costs increase
Solution Approach 1:
The patent merges pressure sensing and force sensing capabilities into a single integrated sensor component, reducing the total number of parts that need to be manufactured, assembled, and calibrated. This significantly lowers manufacturing costs while maintaining comprehensive sensing capability for both presence and action detection
Solution Approach 2:
The patent extracts and eliminates the unnecessary force sensor from the system by designing a single sensor that can perform both detection functions. This removal of redundant components simplifies the manufacturing process and reduces costs while preserving all necessary sensing capabilities
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
This solution simplifies the design by eliminating additional sensors, reduces costs, and provides keyless access control with desired haptic feedback, mimicking conventional bow handles, while maintaining efficient operation.
Implementation Method 1
an electric motor, which can be controlled by a control unit
Implementation Method 2
which rotation can be sensed by a sensing unit and fed to the control unit for evaluation
Data Source
AI summary
A door handle assembly having a vehicle door handle and a vehicle door. The vehicle door handle moves between a first, retracted position, in which an essentially planar surface of the vehicle door handle is flush with an outer face of the vehicle door, and a second, extended position, in which a grip opening between the outer face of the vehicle door and a grip inner side of the vehicle door handle is cleared for a user. The vehicle door handle is movable between the first and second positions aided by an electric motor, controlled by a control unit. The electric motor can be set in rotation starting from the second position of the door handle by application of a user's external force on the basis of a mechanical coupling of the vehicle door handle to the electric motor sensed by a sensing unit and fed to the control unit.