Vehicle Coasting Entry Control for Distance and Speed Tracking
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Solution Overview
Problem
Existing vehicles lack an efficient method to maintain energy efficiency and comfort during coasting modes, particularly in conjunction with distance and speed control, without active braking or drive torque.
Innovation Solution
A control device that predicts a distance and speed profile based on vehicle status and road gradient, decouples the drive motor from the drivetrain during coasting, and adjusts coasting entry and exit phases to maintain target distance and speed within predefined tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the drive motor is decoupled from the drivetrain to enable coasting mode, then energy consumption is reduced, but distance and speed control capability is lost
Solution Approach 1:
The system dynamically switches between coasting mode and active control mode based on real-time driving conditions. The control device monitors whether the vehicle is in a coasting phase and automatically adjusts the drive motor coupling state, enabling the system to adapt its control characteristics to current operational requirements without manual intervention.
Solution Approach 2:
The control device predicts the distance and speed profile during the coasting entry phase before fully decoupling the drive motor. By performing preliminary predictions and assessments of whether target distance and speed will be maintained within tolerance bands, the system可以避免 premature decoupling that would compromise control capability while still achieving energy savings.
2Loss of energy
If active distance and speed control is disabled during coasting mode, then energy efficiency is improved, but the ability to respond to changing driving conditions is reduced
Solution Approach 1:
The control device continuously monitors actual distance and speed during coasting mode and compares them against predicted profiles and tolerance bands. Based on this feedback, the system determines whether to maintain coasting mode or transition back to active control mode, enabling adaptive response to changing conditions while minimizing energy consumption during stable coasting phases.
Solution Approach 2:
The system uses its own predicted distance and speed profile as a reference for self-regulation during coasting mode. By comparing actual performance against the predicted profile generated from gradient data and vehicle status, the control device autonomously determines when intervention is necessary, eliminating the need for continuous active control while maintaining safety and performance.
3Use of energy by moving object
If the coasting entry phase is extended to improve energy efficiency, then energy consumption is reduced, but the time to reach steady coasting state is increased
Solution Approach 1:
The control device performs preliminary prediction of the distance and speed profile during the coasting entry phase before fully committing to coasting mode. By assessing whether the predicted profile will maintain target distance and speed within tolerance bands, the system can confidently extend the coasting entry phase duration to maximize energy savings without compromising overall control performance or taking excessive time to reach steady state.
Data Source
AI summary
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 is provided. The device is designed to predict a distance and/or speed progression of the vehicle in the coasting mode taking into account a movement of the vehicle during a coasting entry phase. The device is also designed to control the coasting mode in accordance with the predicted distance and/or speed progression.