Electric Vehicle Recuperation Control with Adjustable Delay
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Solution Overview
Problem
Existing methods for configuring recuperation behavior in electric vehicles often result in abrupt deceleration during energy recovery, which can be unsafe and uncomfortable for drivers, as they fail to adequately account for both recuperation intensity and delay, leading to unpredictable braking torque and potential loss of control.
Innovation Solution
A method and apparatus that allow drivers to manually set both recuperation intensity and delay, enabling them to configure the recuperation behavior individually, ensuring a conventional braking system is used initially, with recuperation activated only after a specified delay, thus maintaining control and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If recuperation is activated immediately during braking, then energy recovery is maximized, but abrupt deceleration occurs causing driver discomfort and safety risks
Solution Approach 1:
The patent applies preliminary action by introducing a delay period before activating recuperation during braking. The control unit is configured to activate recuperation only after a predetermined time has elapsed since the braking event was detected, allowing the vehicle to initially decelerate using conventional friction brakes alone. This preliminary phase prevents abrupt deceleration while still enabling energy recovery subsequently.
2Loss of energy
If recuperation intensity is increased to improve energy recovery, then more energy is recovered, but the risk of tire locking and loss of control increases
Solution Approach 1:
The patent applies dynamics by making the recuperation intensity adjustable and adaptive rather than fixed. The control unit can modify the recuperation intensity based on detected driving conditions, vehicle state, and environmental factors. This dynamic adjustment allows the system to optimize energy recovery while maintaining vehicle control and preventing tire locking under varying conditions.
Solution Approach 2:
The patent applies parameter changes by allowing the recuperation intensity to be modified as a controllable parameter. The system can adjust the magnitude of the recuperation torque applied to the wheels, changing this parameter based on detected conditions to balance energy recovery with vehicle safety and controllability.
3Productivity
If recuperation is activated without delay, then maximum energy recovery is achieved, but driver comfort and predictability of braking behavior are reduced
Solution Approach 1:
The patent applies preliminary action by implementing a time delay before activating recuperation. The control unit detects the braking event and waits for a predetermined time interval before engaging the recuperation system. This preliminary delay allows the driver to experience predictable conventional braking behavior first, improving comfort and predictability while still enabling subsequent energy recovery.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for safe and comfortable driving by allowing drivers to customize recuperation settings, reducing the risk of sudden deceleration and enhancing energy recovery while maintaining a predictable braking experience, adaptable to various driving styles and conditions.
Implementation Method 1
the motor can be operated as a generator during deceleration in order to generate electrical energy from the motion of the vehicle
Data Source
AI summary
A method for manually and individually configuring a recuperation behavior of an electrically driven vehicle includes the manual setting of the recuperation behavior. The manual setting of the recuperation behavior includes both setting a recuperation intensity and setting a recuperation delay. Accordingly, it is possible to manually meter the braking torque such that both a pleasant driving sensation as well as a situation-specific energy recovery is achieved.