Hybrid EV Emergency Driving Control for Maximum Acceleration
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Solution Overview
Problem
Hybrid electric vehicles face challenges in achieving maximum acceleration performance during emergency driving situations, requiring specialized control logic to manage battery state of charge (SOC) and engage driving assist functions effectively.
Innovation Solution
A method and system for controlling hybrid electric vehicles that includes collecting driving data to determine emergency driving modes, engaging the engine clutch, turning off driving assist functions, and optimizing battery charging strategies to ensure maximum power availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the hybrid electric vehicle uses conventional control logic for normal driving, then fuel efficiency is improved through mode switching between EV and HEV modes, but acceleration performance in emergency situations is insufficient
Solution Approach 1:
The control system dynamically switches between conventional control logic for normal driving and emergency control logic for emergency situations. The controller monitors driving conditions and automatically selects the appropriate control mode, making the system adaptable to different operational requirements without being permanently complex
Solution Approach 2:
The system performs preliminary actions by pre-charging the battery to a higher state of charge (SOC) before emergency situations occur. During normal driving, the controller maintains battery SOC at a higher level than conventional systems, so that when emergency mode is detected, maximum power is immediately available for acceleration
2Power
If the battery SOC is maintained at a high level for emergency readiness, then acceleration performance is improved, but fuel consumption increases during normal operation
Solution Approach 1:
The system changes the battery SOC parameter dynamically based on detected driving conditions. During normal driving, SOC is maintained at a moderate level to balance fuel efficiency. When emergency conditions are detected, the system immediately adjusts SOC to a high level and engages emergency control logic to maximize power availability
3Power
If driving assist functions are enabled during emergency driving, then safety is improved, but acceleration performance is reduced due to power consumption
Solution Approach 1:
The system extracts or disables non-essential driving assist functions during emergency driving mode to concentrate all available power on acceleration. The controller identifies and suspends auxiliary power-consuming functions, allocating maximum power to the propulsion system while maintaining essential safety-critical functions
Data Source
AI summary
A method for controlling driving of a hybrid electric vehicle includes collecting driving data while the hybrid electric vehicle is driven, determining whether the hybrid electric vehicle enters a first mode corresponding to emergency driving of the hybrid electric vehicle or a second mode corresponding to control in preparation for the emergency driving, and controlling the hybrid electric vehicle in accordance with a mode that the hybrid electric vehicle enters among the first mode and the second mode.