Brake Temperature Detection via Slope-Based Method Selection
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Solution Overview
Problem
Existing brake temperature detection systems are prone to errors in calculating brake heat, leading to incorrect fade warnings, especially on sloped roads where gravitational acceleration affects deceleration calculations.
Innovation Solution
A brake temperature detection device that selects between kinetic-energy based and braking-energy based temperature rises based on the road slope, using a hill determination mechanism to ensure accurate brake temperature detection by choosing the optimal method for each road condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If kinetic-energy based temperature rise is used for brake temperature detection, then the detection method is simple, but the accuracy deteriorates on sloped roads due to gravitational acceleration affecting deceleration calculations
Solution Approach 1:
The patent implements a dynamic selection mechanism that automatically switches between kinetic-energy based temperature rise calculation and braking-energy based temperature rise calculation depending on the detected road slope condition. When the hill determination means detects a sloped road, the system transitions to using braking-energy based calculation; when on a flat road, it uses kinetic-energy based calculation. This dynamic adaptation resolves the contradiction by optimizing the detection method according to actual operating conditions.
2Measurement precision
If braking-energy based temperature rise is used for brake temperature detection, then the accuracy is improved, but the device complexity increases due to requiring multiple calculation methods and selection logic
Solution Approach 1:
The system employs a dynamic selection strategy where the temperature detection method is automatically adjusted based on road slope detection. The control device includes a hill determination means that detects whether the vehicle is on a sloped road, and based on this detection, dynamically selects between kinetic-energy based and braking-energy based temperature rise calculations. This ensures high accuracy on sloped roads while maintaining system simplicity through automated conditional logic.
Solution Approach 2:
The hill determination means acts as an intermediary that mediates between the two temperature calculation methods. It detects the road slope condition and uses this information to determine which calculation method should be applied, thereby resolving the complexity issue by introducing a simple conditional decision layer that selects the appropriate calculation approach based on actual operating conditions.
3Device complexity
If deceleration based fade warning is used, then the warning system is simple to implement, but false warnings occur on downhill roads where gravitational acceleration reduces deceleration values
Solution Approach 1:
The fade warning system dynamically adjusts its detection methodology based on road slope conditions. When the hill determination means detects a downhill slope, the system switches from using deceleration-based fade warning to using braking-energy based temperature rise calculation. This dynamic adaptation prevents false fade warnings on downhill roads where gravitational acceleration artificially reduces deceleration values, thereby maintaining warning reliability without excessive system complexity.
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
This approach enhances the accuracy of brake temperature detection, reducing the likelihood of false fade warnings and ensuring a more precise determination of brake heat, even on sloped surfaces, thereby improving braking performance and safety.
Implementation Method 1
a first acquisition means that acquires a kinetic-energy based temperature rise, which is an increase in an amount of brake heat that occurs when kinetic energy generated in a running vehicle is converted into thermal energy by braking
Data Source
AI summary
A brake temperature detection device: acquires a kinetic-energy based temperature rise, which is an increase in an amount of brake heat that occurs when kinetic energy generated in a running vehicle is converted into thermal energy by braking; acquires a braking-energy based temperature rise, which is an increase in an amount of brake heat that is calculated from an amount of work done when a brake's friction material is pressed against a friction target material; determines state of slope of a road surface on which the vehicle is running; and detects a brake temperature in accordance with an increase in an amount of brake heat generated in braking. The brake temperature detection device selects, based on the state of slope, either the kinetic-energy based temperature rise or the braking-energy based temperature rise as the increase in the amount of brake heat generated in braking and achieves brake temperature detection.