Brake Disk Rust Removal via Hydraulic Braking Control
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Solution Overview
Problem
Eco-friendly vehicles experience increased occurrences of 'creep groan noise' due to reduced regenerative braking, leading to rust on brake disks, which in turn deteriorates fuel efficiency and requires costly materials to prevent rusting, while existing solutions fail to effectively remove rust without impacting fuel efficiency.
Innovation Solution
An apparatus and method that determine the need for rust removal based on environmental information, using sensors and weather data to calculate rust amounts and control hydraulic and regenerative braking to minimize fuel efficiency deterioration, efficiently removing rust through increased hydraulic braking during startup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If regenerative braking is increased to improve fuel efficiency, then fuel efficiency is improved, but rust removal is reduced leading to creep groan noise
Solution Approach 1:
The system performs preliminary rust removal action by increasing hydraulic braking during vehicle startup before the rust causes significant noise problems. The controller detects startup conditions and automatically increases hydraulic braking force to remove rust from the brake disk surface in advance, preventing creep groan noise during normal operation while maintaining high regenerative braking for fuel efficiency.
2Object-generated harmful factors
If hydraulic braking is increased to remove rust, then rust removal is improved, but fuel efficiency deteriorates
Solution Approach 1:
Instead of continuously applying hydraulic braking, the system uses periodic action by activating hydraulic braking only during specific periods - namely during vehicle startup. The controller monitors startup conditions and applies hydraulic braking force temporarily during this period to remove rust, then returns to normal regenerative braking operation, thus achieving rust removal with minimal impact on fuel efficiency.
3Object-generated harmful factors
If rust removal mode is extended to ensure complete rust removal, then rust removal effectiveness is improved, but fuel efficiency deterioration increases
Solution Approach 1:
The system implements feedback control by monitoring the integrated value of hydraulic pressure over time during rust removal mode. When this integrated value reaches a predetermined threshold, the controller determines that sufficient rust removal has been achieved and terminates the rust removal mode, returning to normal regenerative braking. This feedback mechanism ensures adequate rust removal while preventing excessive hydraulic braking that would waste energy.
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
Effectively reduces 'creep groan noise' in eco-friendly vehicles by properly removing rust without increasing vehicle costs, while preventing fuel efficiency deterioration by optimizing rust removal timing and mode termination.
Implementation Method 1
a brake pad 120 and a brake disk 110, and a controller 230. The brake system may perform a function of compressing the brake pad to the brake disk to remove rust
Data Source
AI summary
An apparatus for removing rust on a brake disk includes: an environment information acquisition unit configured to acquire environment information, a controller configured to perform a function of calculating an amount of generated rust using the environment information, and controlling the rust removal depending on whether or not the amount of generated rust exceeds the preset reference value, and a driver configured to drive a brake system under the control of rust removal.