Adaptive Damping Torque for Regenerative Braking Stability
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Solution Overview
Problem
The energy recovery system in vehicles tends to stop working when driving on bumpy or slippery roads, leading to sudden deceleration and increased risk of accidents, as it activates anti-lock braking systems (ABS) or dynamic traction control (DTC) systems, causing the energy recovery to cease.
Innovation Solution
A vehicle control method that generates an appropriate damping torque based on the equivalent moment of inertia at the wheel end and the motor rotational speed fluctuation frequency, allowing the vehicle to perform energy recovery without deteriorating bumping or slipping, thus avoiding activation of ABS or DTC systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the energy recovery system works when the vehicle passes through a bumpy road or slippery road, then energy recovery can be performed, but bumping or slipping of the vehicle is deteriorated, causing the ABS or DTC system to be activated and the energy recovery system to stop working
Solution Approach 1:
The system dynamically adjusts the damping torque parameter based on real-time detection of equivalent moment of inertia and motor rotational speed fluctuation frequency. By changing the damping torque parameter adaptively, the system prevents excessive bumping or slipping that would trigger ABS/DTC, thereby maintaining continuous energy recovery operation without compromising vehicle stability
Solution Approach 2:
The system implements a closed-loop feedback mechanism by continuously detecting the equivalent moment of inertia at the wheel end and the motor rotational speed fluctuation frequency. This feedback information is used to adjust the damping torque in real-time, ensuring that energy recovery operations do not deteriorate vehicle stability and prevent unnecessary activation of safety systems
2Reliability
If the energy recovery system stops working to avoid bumping or slipping, then vehicle stability is maintained, but deceleration is suddenly decreased and the driver may fail to brake in time, causing accidents
Solution Approach 1:
The system adjusts the damping torque parameter dynamically to maintain vehicle stability without completely stopping energy recovery. By optimizing the damping torque level, the system preserves sufficient deceleration performance for safety while preventing excessive bumping or slipping that would trigger ABS/DTC activation
3Reliability
If the energy recovery system stops working due to ABS or DTC activation, then bumping or slipping is prevented, but it takes a long time for the energy recovery system to resume work
Solution Approach 1:
The system proactively adjusts the damping torque before bumping or slipping becomes severe enough to trigger ABS or DTC activation. By taking preliminary corrective action based on detected trends in moment of inertia and rotational speed fluctuations, the system prevents the conditions that would cause system shutdown and subsequent resumption delays
Data Source
AI summary
The present disclosure relates to vehicle control methods and apparatuses, vehicles, computer-readable storage mediums, and computer programs. One example control method includes obtaining a target torque, generating a damping torque based on at least one of an equivalent moment of inertia at a wheel end of a vehicle and a motor rotational speed fluctuation frequency of the vehicle, and controlling, based on the damping torque and the target torque, the vehicle to perform energy recovery.