Actuating Drive Control for Asynchronous Locking Transmission Start
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Solution Overview
Problem
Existing actuating drives for motor vehicle electrical assemblies, such as parking brakes and rear spoilers, suffer from low efficiency and require significant maintenance, limiting their performance and reliability.
Innovation Solution
The actuating drive incorporates a non-self-locking drive transmission driven by a motor, a self-locking locking transmission operated by a small, low-power locking motor, and a control unit that allows asynchronous operation of the motors to prevent blockages and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-locking locking transmission is continuously operated synchronously with the drive transmission, then the locking function is maintained, but the efficiency decreases and blockages occur
Solution Approach 1:
The locking motor operates asynchronously with the drive motor, dynamically adjusting its operation mode between synchronous operation (when locking is needed) and asynchronous operation (when efficiency is prioritized), eliminating continuous synchronous operation and its associated energy losses
Solution Approach 2:
The locking motor performs periodic blocking operations rather than continuous synchronous operation, activating only when blockage prevention or release is required, thereby reducing energy consumption while maintaining reliability
2Device complexity
If the locking motor is designed to be small and low-power, then the overall dimensions and manufacturing costs are reduced, but the risk of blockage increases
Solution Approach 1:
The control unit activates the locking motor in advance during starting operations to prevent blockage before it occurs, and can also activate it to release existing blockages, allowing the use of a smaller locking motor while maintaining reliability through proactive control
Solution Approach 2:
The control unit monitors the operational state and activates the locking motor based on detected conditions (starting operations, potential blockage scenarios), providing intelligent control that compensates for the smaller size of the locking motor
3Reliability
If the drive motor and locking motor are operated synchronously, then the locking function is maintained, but the efficiency and productivity decrease
Solution Approach 1:
The system dynamically switches between synchronous operation mode (when locking is required) and asynchronous operation mode (when efficiency is prioritized), with the control unit determining the appropriate mode based on operational conditions, thereby improving overall productivity
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 design results in a compact, low-maintenance, and high-efficiency actuating drive that reduces the risk of blockages and improves operational reliability, thereby enhancing user experience and reducing costs.
Implementation Method 1
a self-locking locking transmission which is operatively connected to the drive transmission, with which the locking transmission can lock the drive transmission and the drive motor, in particular when the drive motor is not energized
Implementation Method 2
a drive motor for driving the drive transmission
Implementation Method 3
a locking motor for driving the locking transmission
Data Source
AI summary
In one aspect, an actuating drive for an electrical assembly of a motor vehicle includes a drive train, which includes a drive transmission and a drive motor for driving the drive transmission. The actuating drive also includes having a locking unit for locking the drive train, which includes a self-locking locking transmission that is operatively connected to the drive transmission, and a locking motor for driving the locking transmission. The actuating drive further includes a control unit for controlling the drive motor and the locking motor. The control unit is designed such that the drive motor and the locking motor can be operated, in particular in a starting operation, asynchronously and/or with a time delay relative to one another.