Vehicle Control Device Dynamic AEB Distance Adjustment
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Solution Overview
Problem
Existing vehicle control systems, such as automatic emergency brake (AEB) systems, cause driver discomfort during parking due to uniformly shortened reference distances, leading to delayed operation timing and disrupted driving rhythm.
Innovation Solution
A vehicle control device that adjusts the speed reduction distance based on vehicle speed, with longer distances during parking at low speeds and shorter distances during parking at higher speeds compared to normal driving, using a distance detection unit, speed detection unit, and reduction support unit to optimize AEB operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the reference distance is uniformly shortened during parking driving, then the AEB can operate in tight spaces, but the driver feels uncomfortable due to delayed operation timing
Solution Approach 1:
The patent applies dynamics by making the reference distance dynamic rather than fixed. The reference distance is adjusted based on vehicle speed, creating a speed-dependent reference distance that adapts to different driving conditions. This resolves the contradiction by allowing short reference distances at low speeds for parking maneuverability while maintaining appropriate distances at higher speeds for driver comfort and safety.
Solution Approach 2:
The patent changes the parameter of reference distance based on vehicle speed. By establishing a relationship where reference distance varies with speed (shorter at low speeds, longer at high speeds), the system achieves both parking adaptability and driver comfort. This parameter change approach allows the AEB to operate effectively in tight parking spaces while preventing delayed operation timing that causes discomfort.
2Measurement precision
If the reference distance is shortened for parking, then the vehicle can detect obstacles closer, but the AEB operation timing becomes delayed relative to driver expectation
Solution Approach 1:
The system uses dynamics to adjust the reference distance according to vehicle speed. At low speeds during parking, the reference distance is shortened to enable close obstacle detection. At higher speeds, the reference distance is extended to ensure AEB operation timing aligns with driver expectations, preventing the timing mismatch that causes discomfort.
Solution Approach 2:
The patent implements parameter changes by making the reference distance a function of vehicle speed. This ensures that obstacle detection precision is optimized for parking conditions while maintaining appropriate response timing for normal driving, thereby resolving the contradiction between detection precision and timing alignment.
3Device complexity
If a fixed reference distance is used for AEB, then the system is simple to implement, but it cannot adapt to different driving conditions (parking vs. normal driving)
Solution Approach 1:
The patent applies dynamics by implementing a speed-dependent reference distance mechanism. The system dynamically adjusts the reference distance based on detected vehicle speed, enabling adaptation to different driving conditions (parking vs. normal driving) without requiring complex multiple-mode control systems. This maintains relative simplicity while achieving condition adaptability.
Solution Approach 2:
The patent uses parameter changes by making the reference distance variable based on speed parameters. This approach allows the AEB system to adapt to different driving conditions through a single continuous parameter adjustment mechanism rather than requiring complex discrete mode switching, thereby maintaining system simplicity while achieving versatility.
Data Source
AI summary
A vehicle control device comprises a unit to detect a distance to an obstacle; a unit to detect a speed of the vehicle; and a reduction support unit to, based on the speed and the distance, perform support for reduction of a speed of the vehicle. The reduction support unit changes the distance at which the reduction support is to be performed between a case where driving during parking and a case where not driving during parking. The distance at which the reduction support is to be performed is, for a first speed range, longer in a case where driving during parking than in a case where not driving during parking, and, for a second speed range, longer in a case where not driving during parking than in a case where driving during parking.