Stop-Hold Brake Control on Uneven Ground to Prevent Wheel Slip
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Solution Overview
Problem
Existing vehicle braking control systems fail to prevent slipping on uneven ground surfaces, such as icy or snowy roads, due to the stop holding control being enabled, leading to potential wheel lock and slip-down situations, and manual disablement can be cumbersome and prone to errors from electrical noise interference.
Innovation Solution
A braking control device with a stop holding controller and uneven-ground traveling determination unit that automatically disables stop holding control when the vehicle is determined to be on uneven ground, using sensors for anti-lock brake, traction control, and attitude stabilization interventions to determine slip states and adjust braking force accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If stop holding control is enabled to maintain vehicle stopped state, then convenience is improved, but wheel lock and slip-down occur on uneven ground
Solution Approach 1:
The control device determines whether the vehicle is traveling on uneven ground before executing stop holding control. By performing this determination in advance (using sensor data about road surface conditions, vehicle attitude, and motion), the system prevents wheel lock and slip-down by disabling stop holding control on uneven ground before the problem occurs, while maintaining convenience on suitable road surfaces
2Reliability
If manual disablement of stop holding control is implemented, then wheel lock is prevented, but operation complexity increases and electrical noise interference occurs
Solution Approach 1:
The control device automatically determines whether stop holding control should be executed by using sensors to detect vehicle attitude, motion state, and road surface conditions. The system self-regulates by enabling or disabling stop holding control based on detected uneven ground conditions, eliminating the need for manual driver intervention and avoiding interference from electrical noise that would affect manual operation signals
Data Source
AI summary
A braking control device includes a stop holding controller and an uneven-ground traveling determination unit. After the vehicle makes a stop and a brake operation performed by a driver who drives the vehicle is canceled, the stop holding controller is configured to perform execution of a stop holding control that includes holding braking force of the vehicle and canceling the braking force in response to a predetermined start operation performed by the driver. The uneven-ground traveling determination unit is configured to determine whether the vehicle is traveling on an uneven ground. The stop holding controller is configured to disable the execution of the stop holding control in a case where the uneven-ground traveling determination unit determines that the vehicle is traveling on the uneven ground.