Vehicle Braking Arrangement Friction-Based Emergency Activation
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Solution Overview
Problem
Existing emergency braking systems with non-reversible braking means that operate independently of vehicle wheels face challenges in determining the optimal activation time, as they affect traffic situations and subject occupants to increased deceleration forces, requiring accurate decision-making to avoid collisions.
Innovation Solution
A vehicle braking arrangement that includes an emergency brake control unit, an acceleration detector, and a wheel brake anti-locking system to calculate the coefficient of friction between wheels and the ground, determining when to activate a non-reversible emergency braking system based on this data and other parameters, such as sensor inputs from cameras and radars, to assess collision risks and adjust braking accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-reversible emergency braking system is activated to enhance braking effect, then collision avoidance capability is improved, but occupant deceleration forces increase and traffic situation is affected
Solution Approach 1:
The system changes the parameter of braking activation decision by calculating and evaluating the coefficient of friction between wheels and ground. The emergency brake control unit determines whether to activate the non-reversible braking means based on the calculated friction coefficient and other parameters, thereby optimizing the braking effect while minimizing harmful deceleration forces on occupants.
2Reliability
If non-reversible braking means is used to ensure effective emergency braking, then braking reliability is improved, but reversibility is lost making it difficult to adjust to changing conditions
Solution Approach 1:
The system performs preliminary calculation of the coefficient of friction and evaluation of multiple parameters before activating the non-reversible braking means. The emergency brake control unit determines the optimal activation timing in advance by assessing collision risk and road conditions, ensuring that the irreversible braking action is only taken when truly necessary and appropriate.
3Reliability
If emergency braking system is activated early to ensure safety, then collision prevention is improved, but unnecessary braking actions increase causing traffic disruption
Solution Approach 1:
The system uses feedback from multiple sensors and the calculated coefficient of friction to continuously monitor road conditions and collision risk. The emergency brake control unit adjusts the braking activation decision based on this feedback, ensuring that braking is activated only when truly necessary and not in situations where it would cause unnecessary traffic disruption.
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
Enhances the determination of when to activate non-reversible emergency braking systems, ensuring accurate and timely intervention to prevent collisions while minimizing occupant deceleration forces, by using the calculated coefficient of friction and sensor inputs to differentiate between necessary and unnecessary braking actions.
Implementation Method 1
an acceleration detector, wherein the emergency brake control unit is arranged to input vehicle acceleration data from the acceleration detector
Implementation Method 2
a wheel brake anti-locking system, wherein the emergency brake control unit is arranged to input vehicle acceleration data from the acceleration detector when the wheel brake anti-locking system is active
Data Source
AI summary
The present invention relates to a vehicle braking arrangement for a vehicle with wheels contacting the ground during normal running. The vehicle braking arrangement includes an emergency brake control unit, a first emergency braking system including non-reversible braking means arranged to operate independently of the vehicle wheels, at least one acceleration detector, and a wheel brake anti-locking system. The emergency brake control unit is arranged to input acceleration data (a) when the wheel brake anti-locking system is active, and to calculate the coefficient of friction (μ) between the wheels and the ground. The emergency brake control unit is arranged to determine if the first emergency braking system should be activated in dependence of a first plurality of parameters, where one of these parameters is the coefficient of friction (μ).