Driver Assistance Control Unit Adaptive Cruise Transition
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Solution Overview
Problem
Existing vehicle driver-assistance systems lack seamless transitions between distance controllers and adaptive cruise control modes, leading to driver fatigue and inefficient operation, particularly in situations requiring dynamic adjustments of speed and distance.
Innovation Solution
A method and control unit that automatically switch from an accelerator-pedal-based distance controller to adaptive cruise control based on stable driver input, utilizing the angular position and velocity of the accelerator pedal to adjust power setpoints and activate the brake system, with optional driver confirmation, allowing for smooth transitions without jerking and reducing driver workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the system uses manual distance controller requiring continuous driver input, then driver control and adaptability are maintained, but driver fatigue and operational complexity increase
Solution Approach 1:
The system monitors the driver's own accelerator pedal inputs and automatically activates adaptive cruise control when it detects stable cruising conditions, allowing the system to serve itself by inferring driver intent from natural driving behavior without requiring explicit driver activation
Solution Approach 2:
The system continuously monitors accelerator pedal position and driver inputs, using this feedback to determine when stable cruising conditions exist and when to automatically transition to adaptive cruise control mode, creating a closed-loop system that adapts to driver behavior
2Extent of automation
If the system transitions between distance controller and adaptive cruise control modes, then automation level improves, but transition smoothness and system stability may deteriorate
Solution Approach 1:
The system performs preliminary monitoring of driver accelerator pedal inputs to detect stable cruising conditions before actually transitioning to adaptive cruise control mode, ensuring that the transition occurs only when conditions are favorable and will be smoothly received
Solution Approach 2:
The system dynamically adjusts the transition behavior based on real-time monitoring of driver inputs and vehicle conditions, making the transition process adaptive and flexible rather than fixed, allowing for smooth handover between control modes
3Reliability
If the system requires driver confirmation for mode changes, then system reliability and driver awareness improve, but operational time and complexity increase
Solution Approach 1:
The system uses partial confirmation by monitoring whether the driver maintains stable accelerator pedal inputs over a predefined period, which serves as implicit confirmation of cruising intent without requiring explicit driver actions or interruptions
Solution Approach 2:
The system skips the traditional explicit confirmation step by inferring driver intent from continuous monitoring of natural driving behavior, allowing the transition to proceed quickly once stable conditions are detected without wasting time on additional driver interactions
Data Source
AI summary
A method for operating a driver-assistance system of a vehicle includes switching from a distance controller of the driver-assistance system to an adaptive cruise control of the driver-assistance system as a function of a driver input by a driver of the vehicle expressed by an angular position of an accelerator pedal of the vehicle.