Vehicle Torque Control for Changing Road Adhesion
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Solution Overview
Problem
New energy vehicles experience instability and discomfort due to sudden changes in road adhesion, leading to jerking, slipping, and fishtailing when control parameters fail to adapt promptly to complex road conditions.
Innovation Solution
A vehicle control method and apparatus that adaptively adjusts control parameters, such as torque, based on road surface characteristics and scenarios to ensure smooth and stable travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If control parameters are adjusted in real-time to adapt to road adhesion changes, then vehicle stability and smoothness improve, but control system complexity increases
Solution Approach 1:
The system performs preliminary road surface recognition and classification before the vehicle actually encounters the road section. By using sensing systems to detect road surface characteristics in advance and pre-determining appropriate torque control strategies, the system prepares control parameters beforehand, enabling smooth transitions when road conditions change without requiring complex real-time control algorithms.
Solution Approach 2:
The control system automatically adjusts torque parameters based on road surface characteristics detected by onboard sensors without requiring manual intervention. The system self-regulates by comparing detected road conditions with pre-stored control strategies and autonomously selects appropriate control parameters, reducing the need for complex external control mechanisms.
2Speed
If control parameters are adjusted rapidly to respond to road adhesion changes, then vehicle responsiveness improves, but driving comfort deteriorates due to jerking and lurching
Solution Approach 1:
The system determines appropriate torque control strategies in advance based on road surface recognition before the vehicle actually encounters the road section. This preliminary determination allows for smooth, gradual adjustment of control parameters rather than sudden changes, maintaining both responsiveness and comfort by preparing control transitions ahead of time.
Solution Approach 2:
The control system dynamically adjusts torque parameters based on the specific road surface characteristics and the vehicle's current state. By using multiple torque control strategies corresponding to different road conditions and selecting the appropriate strategy based on real-time sensing, the system achieves adaptive control that balances responsiveness with comfort.
3Device complexity
If traditional control methods are used without road surface recognition, then system simplicity is maintained, but vehicle performance deteriorates on complex road surfaces
Solution Approach 1:
The control system is divided into distinct functional modules: road surface sensing, road surface recognition and classification, control strategy selection, and torque execution. By segmenting the control system into these independent but coordinated modules, the patent achieves reliable adaptive control on complex road surfaces while maintaining relatively simple implementation of each individual module.
Solution Approach 2:
The patent introduces road surface recognition and classification as an intermediary layer between the sensing system and the torque control system. This intermediary processes raw sensor data, identifies road surface characteristics, and selects appropriate control strategies, enabling reliable vehicle performance on complex road surfaces without requiring direct complex control algorithms.
Data Source
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AI summary
A vehicle control method is disclosed, and relates to the field of vehicle technologies. The method includes: obtaining a road surface characteristic of a first area, where the first area includes an area into which a vehicle is to travel at a future first moment; determining target torque control information based on the road surface characteristic; and controlling, based on the target torque control information, the vehicle to travel. The method may be used to adaptively adjust a control parameter of a vehicle-related component, to ensure smoothness and comfort of vehicle driving. A vehicle control apparatus is further disclosed.