Auxiliary Control System for Vehicle Stability
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Solution Overview
Problem
The Electronic Stability Program (ESP) system in vehicles lacks effective interaction with other control systems, limiting its ability to assist in maintaining vehicle stability during special driving conditions such as oversteer, understeer, braking on split-mu surfaces, and cornering, which can lead to loss of control and reduced safety.
Innovation Solution
An auxiliary control system comprising a Dynamic Stability Assistant (DSA) module and an Electric Power Steering (EPS) module, where the DSA module detects special driving conditions and calculates assist steering torque, generating a torque overlay request sent to the EPS module to regulate the steering wheel torque, thereby enhancing vehicle stability and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ESP system operates independently without interaction with other control systems, then the system complexity is reduced, but the vehicle stability control capability during special driving conditions deteriorates
Solution Approach 1:
The patent combines the ESP system with the EPS (Electric Power Steering) system by introducing a DSA module that communicates with both systems. The DSA module receives steering wheel torque information from the EPS system and sends assist steering torque commands back to it, creating an integrated control architecture that improves vehicle stability during special driving conditions while maintaining manageable system complexity through modular design
2Reliability
If the ESP system interacts with multiple other control systems, then the vehicle stability control capability is improved, but the device complexity increases
Solution Approach 1:
The DSA module serves as an intermediary between the ESP system and the EPS system. It receives steering wheel torque information from the EPS system, processes this information to determine assist torque requirements, and sends commands back to the EPS system. This intermediary approach enables effective interaction between systems while maintaining clear communication protocols and manageable complexity
3Reliability
If assist steering torque is applied during special working conditions, then the vehicle stability is improved, but the steering wheel torque regulation complexity increases
Solution Approach 1:
The system dynamically adjusts the assist steering torque based on real-time detection of special working conditions (oversteer, understeer, split-mu surfaces). The DSA module continuously monitors vehicle state and modifies the torque overlay request accordingly, enabling adaptive stability control that responds to changing driving conditions without requiring complex manual regulation
Data Source
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Figure 3
AI summary
The embodiment of the invention relates to an auxiliary control system and method for vehicles, and belongs to the field of vehicles. The system may comprise a DSA module and an EPS module, wherein the DSA module is used for performing the following steps: detecting whether the vehicle is in a special working condition; calculating the assist steering torque for the current working condition of the vehicle if the vehicle is in a special working condition; generating a torque overlay request comprising the assist steering torque; and sending the torque overlay request to the EPS module; and the EPS module is used for regulating the steering wheel torque according to the assist steering torque in the torque overlay request. The vehicle can always be in a stable and controllable state through the system so that the vehicle safety and driving comfort are improved.