Vehicle Stop Control for Wrong-Gear Reverse Driving
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Solution Overview
Problem
Modern vehicles with electronic control systems, such as those using x-by-wire technology, face challenges in ensuring reliable braking and stopping functions, especially on inclined roads where driver misjudgment can lead to vehicles driving in the wrong gear direction, increasing the risk of accidents.
Innovation Solution
A vehicle stop control system and method that utilizes sensors to detect the driving environment and operating status of the vehicle's systems, warning the driver and initiating emergency braking by engaging the electronic parking brake and controlling the transmission to P gear when the vehicle is detected to be driving in the opposite direction of its current gear stage, thereby reducing accident risk and improving braking stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If electronic control systems are used to automate driving functions, then driver convenience and vehicle automation are improved, but the risk of accidents due to system failures or misjudgments increases
Solution Approach 1:
The system applies preliminary anti-action by detecting potential reverse driving situations before they become dangerous accidents. The controller monitors gear stage and driving direction, and when reverse driving is detected, it proactively engages the electronic parking brake and shifts to P gear to prevent the harmful effect of uncontrolled reverse movement on inclined roads
Solution Approach 2:
The system implements feedback by continuously monitoring vehicle state through sensors (detecting gear stage, driving direction, and environment) and comparing it with expected normal operation. When the feedback indicates abnormal reverse driving behavior, the system triggers emergency braking control to correct the deviation and restore safe operating conditions
2Reliability
If emergency braking control is implemented to prevent accidents, then safety is improved, but the complexity of the control system increases
Solution Approach 1:
The system performs preliminary action by pre-programming the emergency braking response logic and having all necessary sensors and actuators in place before a dangerous situation occurs. When reverse driving is detected, the predetermined emergency braking sequence is automatically executed, eliminating the need for complex real-time decision algorithms during the critical response moment
3Speed
If the vehicle automatically engages electronic parking brake and shifts to P gear during emergency stop, then stopping effectiveness is improved, but the risk of brake system failure due to overheating or malfunction increases
Solution Approach 1:
The system applies dynamics by adaptively controlling the braking process based on real-time vehicle conditions. The emergency braking control adjusts braking force and duration according to the detected reverse driving severity and vehicle state, rather than applying maximum fixed braking force. This dynamic adjustment achieves effective stopping while minimizing excessive stress on the brake system
Data Source
AI summary
A system and a method for vehicle stop control are operable such that when it is detected that a vehicle is driving in a direction opposite to the direction of a current gear stage of the vehicle, the driver is warned and the vehicle enters an emergency braking state so as to reduce the risk of an accident and improve stability of a braking system. The vehicle stop control method performed by a controller of the vehicle includes steps of: converting vehicle driving environment information into data to be used as system input information; checking whether a controller related to each of driving and braking systems of the vehicle operates normally; determining whether the vehicle is driving in a reverse direction; and performing vehicle emergency stop control when the vehicle is driving in the reverse direction.