Vehicle Control System Index Adjustment for Turning Stability
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Solution Overview
Problem
Existing vehicle control systems fail to accurately reflect driver preferences and intentions regarding running characteristics, such as acceleration and suspension, especially in varying environments and driving conditions, leading to inconsistent driveability.
Innovation Solution
A vehicle control system that uses an index based on longitudinal and lateral accelerations to determine running characteristics, with a higher index value indicating crisper behavior and a lower value indicating milder behavior, with specific rules for maintaining or changing these characteristics during turning conditions to ensure consistent driver intention reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the index is changed to reflect driver preferences and running conditions, then the running characteristics can be adjusted to match driver intentions, but the index may change inappropriately during turning conditions causing inconsistent behavior
Solution Approach 1:
The system dynamically adjusts the index based on detected running conditions (acceleration, deceleration, turning) to reflect driver preferences while maintaining stability during turning conditions by suppressing index changes only when turning is detected, allowing flexibility in other conditions
Solution Approach 2:
The system applies different rules for index adjustment based on the local condition of whether the vehicle is turning or not, maintaining crispness during non-turning conditions while ensuring stability during turning conditions
2Adaptability or versatility
If manual mode selection is provided for different running characteristics, then driver preferences can be accommodated, but the system complexity increases and requires switching operations
Solution Approach 1:
The system automatically detects running conditions and adjusts the index to reflect driver preferences without requiring manual mode selection or switching operations, making the system self-adjusting based on detected acceleration, deceleration, and turning conditions
Solution Approach 2:
The system changes the index parameter based on detected running conditions to adjust running characteristics, providing adaptability through parameter adjustment rather than through complex mode selection mechanisms
3Productivity
If the index changes frequently to match running conditions, then the running characteristics can closely follow driver intentions, but the behavior becomes less stable and harder to control
Solution Approach 1:
The system dynamically adjusts the index based on detected running conditions while applying suppression rules during turning conditions to maintain stability, achieving a balance between responsiveness and stability through condition-based dynamic adjustment
Data Source
AI summary
In a vehicle control system, an index used to set a running characteristic of a vehicle is obtained based on a running condition of the vehicle. A change of the index that makes behavior of the vehicle crisper is more likely to occur than a change of the index that makes the behavior of the vehicle milder. When it is determined that the vehicle is in a turning condition, the change of the index or a change of the miming characteristic based on the index is less likely to occur than when it is determined that the vehicle is not in the turning condition.