Vehicle Control System Preventing Sudden Acceleration
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Solution Overview
Problem
Existing vehicle traveling control systems may inadvertently accelerate when a driver under an abnormal state is mistakenly allowed to terminate the stopped state maintaining control, posing a safety risk during rescue operations.
Innovation Solution
The system employs an electric control unit that continuously monitors the driver's ability to operate the vehicle, maintains the vehicle in a stopped state through driving force limiting and continuous braking, and forbids termination of the stopped state maintaining control if the acceleration pedal operation exceeds a threshold, preventing sudden acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stop request button is operated to terminate the stopped state maintaining control, then the control system responds to the operator's input, but the vehicle may be suddenly accelerated if the acceleration pedal is in an operated state
Solution Approach 1:
The control unit checks the acceleration pedal operation amount before permitting termination of the stopped state maintaining control. If the acceleration pedal operation amount exceeds the threshold, the control unit prohibits termination and provides feedback to the operator, thereby preventing the harmful effect of sudden vehicle acceleration before it can occur.
2Adaptability or versatility
If the stopped state maintaining control is terminated when the acceleration pedal operation amount exceeds the threshold, then the system responds to the operator's input, but the vehicle acceleration may become uncontrolled
Solution Approach 1:
The control unit acts as an intermediary between the stop request button operation and the stopped state maintaining control termination. It mediates by checking the acceleration pedal operation amount and only permitting termination when the check result indicates safety, thereby filtering out potentially harmful termination requests.
3Reliability
If the threshold for acceleration pedal operation amount is set low, then the system prevents sudden acceleration more conservatively, but it may unnecessarily prohibit legitimate termination requests
Solution Approach 1:
The control unit uses a predetermined threshold value for the acceleration pedal operation amount to distinguish between legitimate termination requests and potentially harmful ones. This parameter-based differentiation allows the system to maintain high reliability by preventing sudden acceleration while preserving productivity by permitting legitimate termination requests that do not exceed the threshold.
Data Source
AI summary
A vehicle traveling control apparatus stops a vehicle when the driver is under the abnormal state that the driver loses an ability of driving the vehicle, and then performs a stopped state maintaining control to maintain the vehicle at the stopped state. The control apparatus forbids a termination of the stopped state maintaining control if the acceleration pedal operation amount is equal to or greater than a threshold value greater than zero when the termination of the stopped state maintaining control is requested.