Vehicle Stop-Hold Control During Driver Rescue
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle control devices may inadvertently start a vehicle while a driver is being rescued, as they release the stop holding control when the driver's foot touches the accelerator pedal, even if the driver is in an abnormal state.
Innovation Solution
A vehicle control device that continuously applies braking force to hold the vehicle stopped and prohibits the release of stop holding control when the accelerator pedal operation exceeds a threshold or when it is likely that a rescuer is present, ensuring the vehicle remains stationary during rescue operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the stop holding control is released when the accelerator pedal operation amount exceeds a threshold, then the driver can quickly resume driving when in a normal state, but the vehicle may inadvertently start when the driver is being rescued
Solution Approach 1:
The control device applies preliminary anti-action by detecting conditions that suggest rescue operations (door open, seat belt undone) and preemptively preventing the stop holding control from being released, even when the accelerator pedal is operated. This counteracts the potential harmful effect of inadvertent vehicle movement during rescue before it can occur.
Solution Approach 2:
The control device introduces an intermediary condition check between the accelerator pedal operation and the release of stop holding control. It uses door and seat belt status as intermediary indicators to determine whether the driver is being rescued, thereby mediating the decision to release or maintain the stopping state.
2Reliability
If the stop holding control is continuously maintained after stopping, then the vehicle remains stationary during rescue operations, but the driver cannot quickly resume driving when returning to normal state
Solution Approach 1:
The control device applies dynamics by making the stop holding control release condition adaptive rather than static. It dynamically adjusts the release behavior based on real-time detection of door and seat belt states, allowing the system to switch between maintaining strict stopping (during rescue) and permitting quick release (when driver is alone).
Data Source
AI summary
When a driver is in an abnormal state, a vehicle control device executes a stop control of applying a braking force to a vehicle to stop the vehicle and a stop holding control of holding the vehicle in a stopped state after stopping the vehicle with the stop control. The control device is configured to prohibit the stop holding control from being released, when a first condition that is satisfied when an operation amount of an accelerator operator is larger than a predetermined threshold value is satisfied, while the stop holding control is being executed.