Brake Controller Adjusting Distribution Ratio for Consistent Feel
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Solution Overview
Problem
Drivers may experience a sense of incongruity in brake feel during braking operations due to changes in vehicle deceleration not controlled by the driver, particularly when weight changes occur with different vehicle conditions.
Innovation Solution
A brake controller that adjusts the braking distribution ratio between a hydraulic braking system and a regenerative braking system based on vehicle conditions, using different effect correlation values to minimize the change in brake feel by matching the gain map changes to the allowed changes in braking distribution ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the weight is changed in accordance with driving states to change the deceleration, then the braking performance is improved for different driving conditions, but the driver experiences a sense of incongruity in brake feel during the same braking operation
Solution Approach 1:
The patent changes the effect correlation value (a control parameter) in accordance with vehicle conditions such as driving state and vehicle speed. By dynamically adjusting this parameter, the system adapts braking performance to different driving conditions while managing the driver's perception of brake feel consistency.
Solution Approach 2:
The system dynamically switches between different effect correlation values based on real-time vehicle conditions. The brake controller selectively applies different correlation values corresponding to different driving states, enabling adaptive braking control that responds to changing operational contexts.
2Manufacturing precision
If the braking distribution ratio is changed between first and second braking systems based on vehicle conditions, then the braking control precision is improved, but the complexity of the braking system increases
Solution Approach 1:
The patent divides the braking system into a first braking system and a second braking system, each with its own effect correlation value. The controller selectively activates different braking systems based on vehicle conditions, allowing precise control for different driving scenarios while managing overall system complexity through modular organization.
Solution Approach 2:
The braking controller is designed to universally manage multiple braking systems and different vehicle conditions. A single controller handles both braking systems and automatically selects appropriate effect correlation values based on driving state, eliminating the need for separate control mechanisms for each braking system.
Data Source
AI summary
A brake controller according to the present disclosure that changes an effect correlation value correlating to an effect of braking in a first braking system provided in a vehicle in accordance with a vehicle condition of the vehicle includes a control part generating a braking force by at least one of the first braking system and a second braking system different from the first braking system in a case where the vehicle condition is a first condition based on a braking distribution ratio different from that in a case where the vehicle condition is a second condition and a setting part setting the effect correlation values so as to be different from each other in the case where the vehicle condition is the first condition and in the case where the vehicle condition is the second condition.