Accelerator Pedal Reaction Force Restriction During Stable Following
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Solution Overview
Problem
Existing vehicle control systems may inadvertently impede driving by adding reaction force to the accelerator pedal even in stable driving conditions, such as when a driver is maintaining a constant inter-vehicle distance, leading to unnecessary assistance.
Innovation Solution
A vehicle control device with a reaction force control section that restricts the reaction force added to the accelerator pedal if the vehicle is traveling under specific conditions, such as maintaining a constant inter-vehicle distance, for a fixed period of time, thereby reducing the reaction force as the continuous time period lengthens, allowing for driving assistance without impeding driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reaction force is added to the accelerator pedal based on risk level, then driving assistance is provided, but driving is impeded in stable driving conditions
Solution Approach 1:
The system dynamically adjusts the reaction force based on the continuity of stable driving conditions. When stable driving (constant inter-vehicle distance) continues for a fixed period, the reaction force is restricted or cancelled. This dynamic adjustment resolves the contradiction by making the assistance adaptive to driving context rather than static.
Solution Approach 2:
The system monitors the inter-vehicle distance over time and provides feedback to determine whether stable driving conditions persist. This feedback mechanism allows the system to distinguish between transient and sustained stable driving states, enabling appropriate reaction force adjustment to avoid impeding legitimate stable driving.
2Reliability
If reaction force is continuously added to maintain safety, then collision risk is reduced, but driver comfort deteriorates during stable following
Solution Approach 1:
The reaction force magnitude is dynamically adjusted based on the duration of stable driving conditions. The system transitions from applying reaction force for risk mitigation to restricting or cancelling it when stability is confirmed over time, thereby eliminating driver discomfort during legitimate stable following while maintaining collision avoidance capability when needed.
Solution Approach 2:
The system changes the reaction force parameter from a constant safety-oriented value to a time-dependent value that decreases or becomes zero when stable driving conditions persist. This parameter change resolves the contradiction by adapting the force level to the actual risk context.
Data Source
AI summary
A vehicle control device comprises a memory and a processor coupled to the memory. The processor is configured to restrict reaction force added to an accelerator pedal of a driver's vehicle by a reaction force add section configured to add reaction force to the accelerator pedal of the driver's vehicle in a case in which traveling of the driver's vehicle under a specific condition continues for a fixed period of time or greater.