Vehicle Brake Control Device with Independent Pressure Adjustment
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Solution Overview
Problem
Existing vehicle brake control systems fail to achieve optimal distribution of braking forces between front and rear wheels, compromising vehicle stability and energy regeneration in electric vehicles with regenerative braking systems.
Innovation Solution
A vehicle brake control device with independent pressure adjustment units for front and rear wheels, utilizing a first electric motor to generate a first liquid pressure and a second electric motor with a fluid pump and pressure valve to adjust this pressure further, ensuring optimal distribution of braking forces based on the presence of regenerative generators on each wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same liquid pressure is applied to all wheel cylinders regardless of regenerative generator presence, then the brake system structure is simple, but vehicle stability deteriorates due to improper front-rear braking force distribution
Solution Approach 1:
The brake control device is divided into a first pressure adjusting unit for regenerative wheels and a second pressure adjusting unit for non-regenerative wheels. This segmentation allows independent pressure control for each wheel type, enabling proper front-rear braking force distribution for vehicle stability while maintaining structural simplicity through modular design.
Solution Approach 2:
Different pressure adjusting characteristics are applied to different wheels based on their regenerative generator status. The first pressure adjusting unit provides pressure adjustment suited for regenerative wheels, while the second pressure adjusting unit provides different adjustment for non-regenerative wheels, optimizing local braking performance for each wheel type.
2Device complexity
If the same liquid pressure is applied to all wheel cylinders, then the control system is simple, but energy regeneration deteriorates due to inability to maximize regenerative braking force
Solution Approach 1:
The control system is segmented into two independent pressure adjusting units that can operate with different control strategies. The first pressure adjusting unit optimizes pressure for regenerative wheels to maximize energy recovery, while the second unit handles non-regenerative wheels, allowing energy regeneration optimization without complicating the overall control architecture.
Solution Approach 2:
The system changes the liquid pressure parameter differently for regenerative and non-regenerative wheels based on their respective characteristics. This parameter differentiation enables the regenerative wheels to operate at optimal pressure for maximum energy regeneration while maintaining simple control logic through clear parameter distinction.
3Reliability
If independent pressure adjustment is implemented for each wheel, then vehicle stability and energy regeneration are optimized, but device complexity increases
Solution Approach 1:
The pressure adjustment system is segmented into two functional units with distinct roles. The first pressure adjusting unit handles regenerative wheels with adjustment capability, while the second pressure adjusting unit handles non-regenerative wheels. This segmentation achieves reliable regenerative cooperative control while keeping each unit's complexity manageable through clear functional separation.
Solution Approach 2:
Both pressure adjusting units are designed with similar structural components but different adjustment characteristics, allowing them to perform multiple functions within a unified framework. This multi-functionality approach enables independent pressure control for different wheel types while maintaining structural consistency and reducing overall 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 configuration allows for optimized distribution of braking forces, enhancing vehicle stability and energy regeneration by independently controlling liquid pressures in the braking systems of electric vehicles with regenerative braking systems.
Implementation Method 1
a first pressure adjusting unit (YC) that adjusts a liquid pressure generated by a first electric motor (MC, MZ, MD) to a first liquid pressure (Pc)
Implementation Method 2
a second pressure adjusting unit (YD) that is configured by a fluid pump (QL) driven by a second electric motor (ML) and a pressure adjusting valve (UP), and that performs adjustment to increase the first liquid pressure (Pc) to a second liquid pressure (Pp)
Data Source
AI summary
A brake control mounted in a vehicle equipped with a regenerative generator on either the front wheels or the rear wheels including a first pressure adjusting unit that adjusts a liquid pressure generated by a first electric motor to a first liquid pressure and provides the first liquid pressure to wheel cylinders of wheels on one side; and a second pressure adjusting unit that is configured by a fluid pump, which is driven by a second electric motor, and a pressure adjusting valve, and that performs adjustment to increase the first liquid pressure to a second liquid pressure and provides the second liquid pressure to wheel cylinders of wheels on the other side.