Vehicle Coasting Control Using Predicted Distance and Speed Profiles
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Solution Overview
Problem
Existing motor vehicles lack an efficient method to maintain energy efficiency and comfort during coasting modes, particularly in closed-loop distance and speed control scenarios.
Innovation Solution
A device and method for controlling the coasting mode in an open-loop manner, predicting distance and speed profiles based on current driving conditions and comparing them with target values to initiate or end coasting mode as needed, ensuring energy-efficient and comfortable transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the drive motor is decoupled from the drive train to start coasting mode, then energy consumption is reduced, but the ability to maintain target distance and speed control is lost
Solution Approach 1:
The system predicts the distance and speed profile before entering coasting mode to ensure that the vehicle will maintain safe operating parameters throughout the coasting period. This preliminary prediction allows the vehicle to enter coasting mode with confidence that control requirements will be met, resolving the contradiction between energy savings and control reliability.
2Use of energy by moving object
If active closed-loop distance and speed control is deactivated during coasting mode, then energy efficiency is improved, but the precision of maintaining target distance and speed is reduced
Solution Approach 1:
Although active closed-loop control is deactivated during coasting, the system continuously monitors actual distance and speed against the predicted profile. This feedback mechanism ensures that the vehicle remains within acceptable tolerances of the target values, maintaining precision without requiring active control intervention that would consume energy.
Solution Approach 2:
The system performs preliminary prediction of the distance and speed profile before coasting begins, establishing expected trajectories that serve as reference for passive monitoring during coasting. This allows the system to maintain precision through prediction-based guidance rather than active control.
3Use of energy by moving object
If the vehicle enters coasting mode without prediction, then energy consumption is reduced, but comfort and safety may be compromised due to unexpected deviations from target speed and distance
Solution Approach 1:
The system predicts the distance and speed profile before entering coasting mode to ensure comfort and safety requirements are met. By calculating the expected trajectory in advance, the system can identify suitable coasting opportunities that will not compromise comfort or safety, allowing energy-efficient coasting while maintaining operational quality.
Data Source
AI summary
The present disclosure relates to a device for controlling the coasting mode of a vehicle in the context of a distance control and/or speed control function of the vehicle. In one form, a device is designed to predict a distance and/or speed graph for the vehicle in the coasting mode on the basis of a current degree of advancement of the vehicle, and to compare the predicted distance and/or speed graph for the vehicle with a target distance and/or a target speed of the distance control and/or speed control function of the vehicle. The device is also designed to control the coasting mode depending on the comparison.