Dynamic Emergency Braking Phase Switching for Vehicle Adaptability
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Solution Overview
Problem
Existing emergency braking systems for vehicles are not adequately adaptable to changing driving and environmental conditions, such as varying coefficients of friction, which can impact the effectiveness of the braking process.
Innovation Solution
A method that triggers emergency braking with a driver warning and specifies deceleration phases based on influencing variables like the coefficient of adhesion, allowing for dynamic adaptation of the braking process by switching between different deceleration levels, including a maximum deceleration when conditions become critical.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed deceleration value is used for emergency braking, then the control system is simple, but the system cannot adapt to changing driving and environmental conditions
Solution Approach 1:
The patent implements dynamic adaptation by dividing emergency braking into multiple phases (first emergency braking phase with first deceleration value, second emergency braking phase with second deceleration value) and switching between them based on detected cascade conditions. This allows the system to adapt to changing conditions while maintaining a relatively simple control structure through phase-based transitions rather than continuous complex calculations.
Solution Approach 2:
The system changes the deceleration parameter dynamically by switching between different deceleration values (first deceleration value, second deceleration value) based on the influencing variable and cascade conditions. This parameter switching enables adaptation to varying road conditions, vehicle speeds, and environmental factors without requiring a completely complex control architecture.
2Speed
If emergency braking is triggered immediately without warning, then response time is minimized, but driver awareness and preparation are reduced
Solution Approach 1:
The patent implements a warning cascade that provides preliminary warning to the driver before full emergency braking is applied. The system detects warning conditions and triggers a driver warning, then proceeds through phased emergency braking (first phase with lower deceleration, second phase with higher deceleration) to prepare the driver and vehicle progressively, rather than applying maximum braking immediately.
Solution Approach 2:
The emergency braking process is segmented into distinct phases: warning phase, first emergency braking phase with first deceleration value, and second emergency braking phase with second deceleration value. This segmentation allows the system to balance immediate response with driver preparation by providing staged warnings and progressive deceleration increases.
3Length of moving object
If high deceleration is applied immediately, then stopping distance is reduced, but vehicle stability and driver comfort deteriorate
Solution Approach 1:
The system dynamically adjusts deceleration levels through phased emergency braking, starting with a first deceleration value in the first emergency braking phase and increasing to a second deceleration value in the second emergency braking phase when cascade conditions are met. This dynamic progression maintains vehicle stability by avoiding sudden maximum deceleration while still achieving effective stopping through progressive force application.
Data Source
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AI summary
The method involves issuing a driver warning upon activation of an emergency brake. An effect size of the emergency braking is specified and controlled according to a time before or during the emergency braking. A delay value of a delay phase or delay duration is determined through the effect size related to the emergency braking.