Vehicle Braking Control Device for Parking Operations
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Solution Overview
Problem
Existing vehicle braking control systems fail to adequately increase braking force when a driver requests more braking force during a parking braking operation while the vehicle is traveling, leading to insufficient braking force application.
Innovation Solution
A vehicle braking control device that includes a first braking control unit to operate a hydraulic braking device and a second braking control unit to operate a regenerative braking device, allowing for increased braking force when the first braking device is insufficient, ensuring adequate braking force application during parking braking operations while the vehicle is traveling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the hydraulic braking device is operated to increase braking force during parking braking operation while the vehicle is traveling, then the braking force is increased, but the braking force may not reach the request braking force when the driver needs additional braking force
Solution Approach 1:
The patent combines the hydraulic braking device and the parking braking device into a unified braking control system. When the driver performs a parking braking operation while the vehicle is traveling, the control unit determines whether to operate the hydraulic braking device, the parking braking device, or both simultaneously based on the relationship between the operating amount of the braking operation member and the vehicle speed, thereby achieving sufficient and reliable braking force.
Solution Approach 2:
The patent dynamically selects which braking device to operate based on real-time conditions. The control unit adjusts the braking strategy by comparing the operating amount of the braking operation member with vehicle speed, switching between hydraulic braking, parking braking, or combined braking modes to ensure the request braking force is always achieved.
2Device complexity
If only the hydraulic braking device is used during parking braking operation while the vehicle is traveling, then the device complexity is reduced, but the braking control is insufficient when the driver requests increased braking force
Solution Approach 1:
The patent makes the braking control system universal by enabling it to handle multiple scenarios with a single integrated control unit. The control unit can manage both hydraulic braking and parking braking operations, adapting its behavior based on the relationship between braking operation member operating amount and vehicle speed, thus providing versatile braking control without adding separate control systems.
Solution Approach 2:
The control unit dynamically adjusts its operation mode based on real-time conditions. By comparing the operating amount of the braking operation member with vehicle speed, the system automatically selects the appropriate braking strategy (hydraulic only, parking braking only, or combined), providing adaptable braking control responsive to driver intentions and vehicle states.
Data Source
AI summary
Provided is a vehicle braking control device applicable to a vehicle equipped with an electric-powered parking braking device, a hydraulic braking device and a regenerative braking device. The braking control device comprises a first braking control unit and a second braking control unit. When a parking braking operation is performed while the vehicle is travelling, the first braking control unit implements a first braking process which increases the braking force to the vehicle by operating the hydraulic braking device. When the braking force to the vehicle needs to be increased in a situation where the first braking process is being implemented, the second braking control unit implements a second braking process which increases the braking force to the vehicle by operating the regenerative braking device.