Differential Braking Surface Recognition From Wheel Friction Data
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Solution Overview
Problem
Existing vehicle systems struggle to accurately determine road surface type and friction level, particularly in conditions of steering failure or malfunction, which affects the performance of braking and propulsion systems.
Innovation Solution
Utilizing differential braking to monitor brake caliper pressures and wheel behavior to determine surface friction, enabling systems to adapt their performance to specific road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential braking is used to determine surface friction, then measurement precision of surface conditions is improved, but device complexity increases due to additional sensors and processing requirements
Solution Approach 1:
The braking system uses its own operational data (brake pressure, wheel speed) to determine surface friction conditions, eliminating the need for separate dedicated sensors. The system serves itself by utilizing existing measurements for dual purposes: braking control and surface recognition.
Solution Approach 2:
The braking system performs multiple functions simultaneously: it provides braking control and also determines surface friction conditions. This multi-functionality allows the system to extract surface information from regular braking operations without adding dedicated surface detection hardware.
2Reliability
If brake pressure monitoring is used to detect surface type, then reliability of surface recognition is improved, but loss of information occurs due to limited data availability during steering failure
Solution Approach 1:
The system continuously monitors brake pressure and wheel speed during braking operations, using this feedback to determine surface friction conditions. This ongoing feedback mechanism allows the system to build reliable surface recognition data from repeated measurements during normal braking events.
Solution Approach 2:
The system performs surface recognition during regular braking operations before steering failure occurs, storing surface condition information that can be retrieved and used when steering systems fail. This preliminary data collection ensures information is available even when primary steering systems are unavailable.
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 vehicle stability and performance by allowing systems to tailor their operations based on real-time surface friction data, improving safety and control during steering failures or malfunctions.
Implementation Method 1
differential braking to determine surface type or friction level under a road wheel
Data Source
AI summary
Disclosed is a method, product, and system including the use of or using differential braking to determine a surface type or friction level under a road wheel of a vehicle and communicating the determined surface type or friction level under the road when to another system or component of the vehicle.