Stopped-Vehicle Braking Force Control to Prevent Wheel Overload
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing braking control devices do not effectively manage braking force after a vehicle has stopped, leading to the potential application of excessive braking force on the wheels.
Innovation Solution
A braking control device that includes a determination unit to identify when a vehicle is stopped, a setting unit to establish a maintenance braking force necessary for maintaining the stopped state, and a control unit that reduces the actual braking force to the maintenance braking force when it exceeds the set value, regardless of the required braking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If braking control is executed from start of braking to vehicle stop as in prior art, then responsiveness during emergency braking is ensured, but excessive braking force continues to be applied to wheels after vehicle stop
Solution Approach 1:
The control device performs preliminary action by detecting vehicle stop condition and proactively reducing braking force before excessive braking force causes damage. The determination unit detects when vehicle speed is zero or below threshold, and the control unit preemptively reduces braking force to the maintenance level, preventing harmful effects before they occur.
Solution Approach 2:
The braking force control is made dynamic by continuously monitoring vehicle speed and automatically adjusting braking force based on vehicle state. The system transitions from high braking force during deceleration to low maintenance braking force after stop, adapting the braking force level to the current operational phase.
2Reliability
If high braking force is applied to maintain stopped state, then vehicle remains stationary, but power consumption increases and braking system suffers high-load operations
Solution Approach 1:
The system changes the braking force parameter from high level during deceleration to low level after stop. The control unit adjusts the braking force parameter based on vehicle speed parameter, maintaining only the minimum necessary braking force (maintenance braking force) after vehicle stop to prevent vehicle movement while minimizing energy consumption.
Solution Approach 2:
The braking system serves itself by automatically detecting stop condition and self-adjusting the braking force to maintenance level without requiring continuous high-force application. The determination unit and control unit work together to maintain stopped state with minimal braking force, eliminating the need for sustained high-load operations.
3Use of energy by moving object
If braking force is reduced after vehicle stop, then power consumption decreases, but vehicle may fail to remain stationary on inclined surfaces
Solution Approach 1:
The system implements feedback by continuously monitoring vehicle speed and operational state, and adjusting braking force accordingly. The determination unit provides feedback on vehicle stop condition, and the control unit responds by setting appropriate maintenance braking force level, ensuring stability while minimizing energy consumption.
Solution Approach 2:
The maintenance braking force provides continuous useful action to prevent vehicle movement after stop. Rather than completely releasing brakes, the system maintains a continuous low-level braking force that is sufficient to prevent rollback on inclines while being energy-efficient compared to high braking force.
Data Source
AI summary
The braking control device includes a determination unit configured to determine whether a vehicle is in a stopped state; a setting unit configured to set a vehicle stop maintenance braking force necessary for maintaining the stopped state of the vehicle; and a control unit configured to execute, when the determination unit determines that the vehicle is in the stopped state and an actual braking force applied in the stopped state of the vehicle is greater than the vehicle stop maintenance braking force set by the setting unit, vehicle stop maintenance control for decreasing the actual braking force toward the vehicle stop maintenance braking force regardless of a required braking force required by at least one of a driver of the vehicle and another device.