Automatic Brake Disc Cleaning via Rain-Intensity Control
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Solution Overview
Problem
Existing braking systems for automotive vehicles face challenges in reducing brake disc scoring, especially under rainy conditions, which can lead to reduced friction and braking power due to accumulation of metallic particles and de-icing substances, and conventional methods are not sufficiently accurate or efficient in addressing this issue.
Innovation Solution
A method that calculates a product of rain intensity, brake-activation-free driving time, and current vehicle speed to determine if an automatic braking operation should be activated to clean the brake disc, using sensors and a master brake cylinder to ensure minimal deceleration and effective cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic braking operation is activated frequently to clean brake disc, then brake disc scoring is reduced, but energy consumption increases
Solution Approach 1:
The system changes the parameter of braking operation frequency based on calculated risk scores. When the product of rain intensity, brake-activation-free time, and vehicle speed exceeds a threshold, automatic braking is activated to clean the disc. This dynamic parameter adjustment reduces unnecessary braking operations while maintaining brake disc cleanliness when needed, thereby reducing energy consumption while preventing scoring.
Solution Approach 2:
The system incorporates feedback mechanisms by continuously monitoring rain intensity, brake activation status, and vehicle speed to calculate a composite parameter. This feedback loop enables the system to determine optimal moments for automatic braking intervention, activating cleaning operations only when the calculated parameter indicates high risk of scoring, thus balancing brake disc protection with energy efficiency.
2Reliability
If automatic braking operation is activated to clean brake disc, then particle accumulation is removed, but braking performance is temporarily reduced
Solution Approach 1:
The system employs periodic automatic braking operations based on calculated parameters rather than continuous braking. By determining specific moments when the product of rain intensity, brake-activation-free time, and vehicle speed exceeds a threshold, the system activates cleaning operations periodically only when necessary, minimizing the duration and frequency of braking interventions while maintaining brake disc cleanliness.
Solution Approach 2:
The system performs preliminary assessment by calculating the composite parameter (rain intensity × brake-activation-free time × vehicle speed) before activating automatic braking. This preliminary action allows the system to predict when particle accumulation will reach critical levels and activate cleaning operations proactively, reducing the need for frequent corrective braking that would temporarily reduce braking performance.
3Reliability
If conventional braking methods are used without parameter-based control, then system complexity is low, but accuracy in reducing brake disc scoring is insufficient
Solution Approach 1:
The system achieves multi-functionality by using a single automatic braking mechanism that serves both primary braking purposes and brake disc cleaning functions. The same brake pads and calipers used for normal braking operations are utilized to remove particle accumulation when the calculated parameter exceeds the threshold, eliminating the need for separate cleaning mechanisms and reducing overall system complexity while improving scoring reduction accuracy.
Solution Approach 2:
The braking system performs self-service by automatically determining when cleaning operations are needed based on monitored parameters (rain intensity, brake-activation-free time, vehicle speed). The system self-regulates its own operation by calculating the composite parameter and activating automatic braking when the threshold is exceeded, eliminating the need for external control systems or manual intervention while improving the accuracy of scoring prevention.
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 method effectively reduces brake disc scoring during rainy conditions, maintaining braking power even under high thermo-mechanical loads by precisely activating the automatic braking operation based on calculated parameters, thereby extending the life of brake discs and drums.
Implementation Method 1
when the brakes are activated, a metallic disc continuously engages with a set of brake pads, to stop the wheels quickly. The brake pads are generally mounted on a set of brake calipers, which keeps them in continuous contact with the brake disc, and the friction produced during the contact ceases the rotation of the wheels.
Data Source
AI summary
A method for avoiding reducing scoring of the brake disc or the brake drum of a vehicle driven under rainy conditions calculates a product of three parameters, and activates an automatic braking operation for the vehicle, regularly, whenever the product exceeds the pre-determined threshold level. The first parameter is a rain intensity based parameter, a measure of the current raining intensity. The second parameter is a brake-activation-free driving time parameter, representing the time elapsed since the braking system of the vehicle was activated last. The third parameter is a speed parameter, which represents a current speed of the vehicle. As the automatic braking operation is carried out, the particles of dust, water, snow and de-icing substances, adhered to the brake disc of the vehicle, and causing scoring of the brake disc, are quickly removed, thus, reducing disc scoring.