Driver Assistance System Standby Mode for Comfortable Braking
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Solution Overview
Problem
Current long-distance driver assistance systems, such as ACC, have limited sensor range and high uncertainty in lane association, leading to uncomfortable braking and delayed reaction to vehicles ahead, as they can only detect vehicles at 200 meters and struggle to compensate for high differential velocities without driver intervention.
Innovation Solution
A method where the driver assistance system remains in a standby mode after deactivation, continuously detecting the area ahead and notifying the driver or autonomously reactivating when a vehicle is detected, allowing for timely reactivation and comfortable long-distance driving by providing notifications or self-activation based on driving scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver assistance system remains deactivated after driver intervention, then the driver has full control and can perform early engine braking, but the system fails to detect and respond to vehicles ahead until the driver manually reactivates it
Solution Approach 1:
The sensor system performs preliminary detection of vehicles ahead while the system is in the deactivated state. When a vehicle is detected, the system prepares control parameters in advance, allowing for smooth transition to active control mode without delayed reaction or uncomfortable braking.
2Reliability
If the driver assistance system is reactivated too early after deactivation, then the system has time to detect vehicles ahead, but the vehicle accelerates again because the system attempts to reach the original velocity
Solution Approach 1:
The control device continuously monitors the current velocity, target velocity, and detected vehicle position. When reactivating from deactivated state, the system receives feedback about the actual driving situation and adjusts control parameters accordingly, preventing unnecessary acceleration and ensuring smooth velocity control.
3Ease of operation
If the driver assistance system is reactivated too late after deactivation, then the vehicle velocity has already been reduced, but significantly more velocity must be reduced via stronger braking
Solution Approach 1:
The sensor system continuously monitors the area ahead even when the system is deactivated. When a vehicle is detected during the deactivated state, the control device prepares control parameters in advance, so that upon reactivation, the system can immediately begin smooth deceleration rather than requiring strong emergency braking.
4Loss of time
If the sensor range is extended to enable earlier detection of vehicles ahead, then predictive autonomous driving is improved, but the uncertainty of lane association increases
Solution Approach 1:
The system dynamically adjusts its detection and processing focus based on the detected vehicle's position and relative motion. For objects at greater distances, the system allows more time for lane association verification before triggering control actions, optimizing the balance between early detection and measurement precision.
Data Source
AI summary
The invention relates to the operation of a motor vehicle having a long-distance driver assistance system comprising at least one sensor which detects the area in front of a vehicle, and a control device which is designed to detect another motor vehicle traveling ahead, in order to drive the motor vehicle relative to the other vehicle traveling ahead when the driver assistance system is activated and operationally ready, wherein the activated driver assistance system can be deactivated from a control or regulating mode by driver activity, wherein upon deactivation, the system may enter into a system standby mode continuously detecting the area in front of the motor vehicle, and can reactivate autonomously once another motor vehicle traveling ahead is detected and a drag deceleration is required to reduce a velocity difference between the operated motor vehicle and the other vehicle traveling ahead.