Vehicle Start Control Using Driving Intention Messages
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Solution Overview
Problem
The accordion effect occurs when vehicles with automatic longitudinal control systems experience delays due to sensor and actuator delays, leading to inefficient driving styles and reduced vehicle throughput at intersections and traffic lights, which also increases fuel consumption and pollutant emissions.
Innovation Solution
A method for semi-automated or automatic vehicle control that uses vehicle-to-vehicle communication to receive driving intention messages from preceding vehicles, allowing for optimized starting behavior and reduced delays by adapting parameters such as distance and acceleration profiles, thereby minimizing the accordion effect and improving vehicle throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic longitudinal control systems are used to maintain comfortable distances and analyze driving behavior, then driving comfort is improved, but delays occur due to sensor and actuator response times, causing accordion effect and reducing vehicle throughput
Solution Approach 1:
The system performs preliminary actions by having the leading vehicle transmit its driving intention (acceleration, deceleration, stopping) to following vehicles in advance through vehicle-to-vehicle communication. Following vehicles receive and process this information before the actual driving maneuver occurs, allowing them to prepare and respond more quickly, thereby reducing the accordion effect while maintaining comfortable following distances
Solution Approach 2:
The system implements feedback by continuously transmitting driving intention information from leading vehicles to following vehicles through vehicle-to-vehicle communication. This feedback loop allows following vehicles to adjust their driving behavior in real-time based on the actual intentions of the leading vehicle, reducing delays caused by sensor and actuator response times while maintaining safe following distances
2Reliability
If sensor evaluation and plausibility checks are performed to ensure detection security, then reliability is improved, but delay times increase due to additional processing requirements
Solution Approach 1:
The system uses vehicle-to-vehicle communication as an intermediary to transmit driving intention information directly from the leading vehicle to following vehicles. This bypasses the need for following vehicles to perform extensive sensor evaluation and plausibility checks on the leading vehicle's behavior, as the communication channel provides pre-validated intention data, thus reducing delay times while maintaining reliability through the communication protocol's inherent security checks
3Ease of operation
If conventional automatic longitudinal control is used with standard reaction times, then driving comfort is maintained, but strong acceleration and braking occur in convoys, creating inefficient driving styles and increasing fuel consumption
Solution Approach 1:
The system enables preliminary action by transmitting driving intentions from the leading vehicle to following vehicles before the maneuvers occur. Following vehicles can prepare their powertrain and braking systems in advance, execute smoother acceleration and deceleration profiles, and avoid the strong, abrupt maneuvers characteristic of conventional systems. This reduces energy loss while maintaining comfortable and natural driving behavior throughout the convoy
Data Source
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AI summary
The invention relates to a method for a semi-automatic or automatic controller of a vehicle (10, 22) during starting, in order to prevent an accordion effect when starting the vehicle (10, 22) in a queue of vehicles. For this purpose, a driving intention message is received from a further vehicle (21). The driving intention message displays information relating to a planned starting process of the further vehicle (21). It is also determined whether the further vehicle (21) is located directly in front of the vehicle (22). If it is determined that the further vehicle (21) is located directly in front of the vehicle (22), a parameter for the semi-automatic or automatic controller of the vehicle (22) is determined depending on the received driving intention message.