Brake Control Apparatus Regenerative Frictional Switching
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Solution Overview
Problem
Current brake control systems for vehicles are complex and costly, requiring multiple fluid pressure valves to achieve improved ride quality and fuel consumption performance while ensuring brake performance and reliability, necessitating a simpler system that reduces costs.
Innovation Solution
A brake control apparatus that combines regenerative braking with frictional braking, using a fluid pressure control valve to adjust operating fluid pressure and switch between regenerative and frictional braking forces based on vehicle conditions, reducing the need for pressure reducing control valves and simplifying the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fluid pressure valves are used to achieve fine control of braking force, then ride quality and brake performance are improved, but system complexity and cost increase
Solution Approach 1:
The patent combines regenerative braking and frictional braking systems into a unified brake control apparatus. The regenerative braking unit (motor generator) and frictional braking unit (wheel cylinders) are integrated under common control, allowing the system to achieve fine braking control through coordinated operation of these two braking mechanisms rather than relying solely on multiple complex fluid pressure valves.
Solution Approach 2:
The patent replaces part of the mechanical fluid pressure control system with a regenerative braking system that uses electrical control. The motor generator can be controlled precisely through electrical signals to provide regenerative braking force, substituting for some mechanical pressure control functions and reducing the need for multiple fluid pressure valves.
2Use of energy by moving object
If regenerative braking is used to improve fuel consumption performance, then energy efficiency is improved, but system complexity increases due to need for switching control
Solution Approach 1:
The patent implements dynamic switching control that automatically adjusts the braking force distribution between regenerative and frictional braking based on real-time vehicle conditions. The controlling unit monitors vehicle speed, brake pedal operation, and other parameters to dynamically determine the optimal mix of regenerative and frictional braking, allowing the system to adapt to changing conditions without requiring complex manual intervention or fixed configurations.
Solution Approach 2:
The motor generator serves multiple functions: it acts as a regenerative brake during deceleration, provides frictional braking through the wheel cylinders when needed, and can operate independently or in combination with the frictional braking system. This multi-functionality allows a single component to handle various braking scenarios, reducing the need for separate dedicated components for each braking mode.
3Reliability
If frictional braking force is adjusted regardless of brake pedal operation to ensure required braking force, then brake performance is improved, but system complexity increases due to need for pressure increasing and reducing control valves
Solution Approach 1:
The patent replaces part of the mechanical fluid pressure control system with a regenerative braking system that uses electrical control. The motor generator can be controlled precisely through electrical signals to provide regenerative braking force, substituting for some mechanical pressure control functions and reducing the need for multiple fluid pressure valves.
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 simplifies the brake control system, reduces costs, improves ride quality, enhances fuel consumption performance, and ensures reliable braking by effectively managing braking forces through regenerative and frictional braking, eliminating the need for complex pressure reducing controls.
Implementation Method 1
a regenerative braking unit configured to generate regenerative braking force by power regeneration to a rotating electrical machine, which drives the wheel
Implementation Method 2
a frictional braking unit configured to generate frictional braking force by supplying operating fluid to a wheel cylinder provided on each wheel of a vehicle to press a frictional member against the wheel
Data Source
AI summary
A brake control apparatus is provided with a frictional braking unit configured to generate frictional braking force, a regenerative braking unit configured to generate regenerative braking force, a fluid pressure control valve configured to adjust an operating fluid pressure, and a controlling unit configured to execute regenerative control to cover entire required braking force required by a driver by the regenerative braking force and executing switching control to cover the required braking force by the frictional braking force in place of the regenerative braking force by adjusting to increase the operating fluid pressure by the fluid pressure control valve when a predetermined condition is satisfied. By covering the entire required braking force by regenerative braking force and executing the switching control to adjust to increase the operating fluid pressure by the fluid pressure control valve to cover the required braking force when a predetermined condition is satisfied.