Variable Speed Spoiler Control for Noise Reduction
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Solution Overview
Problem
Existing spoiler devices for motor vehicles lack an efficient method to adjust spoiler units based on changing driving conditions, leading to suboptimal aerodynamic performance and increased noise during position changes.
Innovation Solution
A method and device that determine a characteristic value for the positional difference between initial and final positions, deriving and setting a travel speed for the spoiler unit to adapt to changing driving conditions, ensuring harmonic movement and reduced noise by varying speed based on distance and angle adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the spoiler unit is adjusted quickly to respond to changing driving conditions, then the aerodynamic performance is improved, but mechanical noise increases during position changes
Solution Approach 1:
The patent applies dynamics by making the travel speed of the spoiler unit variable rather than constant. The control device dynamically adjusts the travel speed based on the current position and the target position, allowing the system to optimize between speed and noise depending on the adjustment context.
Solution Approach 2:
The patent changes the parameter of travel speed from a fixed value to a variable value that depends on the positional difference. By deriving travel speed as a function of the characteristic value (positional difference), the system adapts its movement parameters to minimize noise while maintaining efficient response to driving condition changes.
2Device complexity
If a fixed travel speed is used for spoiler adjustment, then the control system is simple, but the adjustment quality and noise reduction are suboptimal
Solution Approach 1:
The patent derives travel speed as a function of the characteristic value representing positional difference. This parameter change approach allows the system to use a relatively simple control structure while achieving variable speed control that reduces noise during adjustment.
Solution Approach 2:
The control device automatically determines the appropriate travel speed based on the positional difference without requiring complex external input or manual intervention. The system self-regulates its movement characteristics based on the adjustment requirements.
3Reliability
If the spoiler unit travels a long distance to reach the optimal position, then the aerodynamic performance is optimized, but the response time increases
Solution Approach 1:
The patent makes the travel speed dynamic and adaptive based on the distance to be covered. For longer distances, the system can maintain higher speeds for more of the journey, while for shorter distances, it can use optimized speed profiles to minimize overall response time while still achieving the target position accurately.
Solution Approach 2:
The control device calculates the characteristic value for positional difference in advance and derives the appropriate travel speed before the adjustment begins. This preliminary determination of movement parameters allows the system to optimize the entire adjustment trajectory for both speed and accuracy.
Data Source
AI summary
A method for adjusting a spoiler unit of a spoiler device of a motor vehicle from a first position into a second position includes determining a characteristic value for a positional difference between the first position and the second position and deriving, as a function of the characteristic value, a travel speed of the spoiler unit.