Brake Hold Control from Operation Lever and Vehicle State
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Solution Overview
Problem
Existing driving assistance devices for physically impaired individuals face challenges in easily and automatically setting and releasing the brake held state, particularly due to difficulties in operating release levers and brake holding switches.
Innovation Solution
A driving assistance device equipped with an operation lever and a controller that automatically sets the brake to a held state based on vehicle speed and operation lever position, and releases it when specific conditions are met, such as operation lever movement or elapsed time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a release lever or brake holding switch is provided for manual operation, then the brake position can be held in a brake actuated state, but it becomes difficult to operate for users with physical disabilities
Solution Approach 1:
The system automatically determines and executes brake holding based on operation lever position and vehicle state without requiring manual activation by the user. The controller monitors the operation lever position sensor and vehicle speed sensor, and automatically sets the holder to held or released state according to predetermined conditions, making the system serve itself rather than requiring user intervention.
Solution Approach 2:
The patent replaces manual mechanical operation (release lever or brake holding switch) with an automated electronic control system. The controller uses sensors to detect operation lever position and vehicle state, then electronically controls the holder mechanism, substituting the mechanical manual operation system with an electronic automated system that is accessible to physically impaired users.
2Ease of operation
If automatic brake holding is implemented based on operation state, then ease of operation is improved, but the risk of false operations may increase
Solution Approach 1:
The system uses multiple parameters (operation lever position, vehicle speed, operation speed) to determine brake holding state. By monitoring changes in these parameters over time and space, the system can distinguish between intentional brake operations and false operations, reducing false activation while maintaining automatic operation benefits.
Solution Approach 2:
The controller continuously monitors the operation lever position sensor and vehicle speed sensor, comparing current states with predetermined thresholds and conditions. This feedback mechanism allows the system to make informed decisions about brake holding, adjusting its behavior based on real-time sensor data to prevent false operations while maintaining ease of use.
Data Source
AI summary
To provide a driving assistance device with which a brake held state can be automatically or easily set. A driving assistance device includes a controller configured to collect detection results of an operation state of an operation lever and a state of a vehicle, the controller determines whether to set a holder to be held or released based on the operation state of the operation lever and the state of the vehicle, and a switching instruction unit provides an instruction for switching the holder between a held state and a released state in accordance with a result of the determination by the controller.