Fuel Cell Idling Mode Switching for Fast Power Recovery
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Solution Overview
Problem
Fuel cell vehicles face reduced driving dynamics and increased energy consumption due to high electrical voltages, which negatively impact service life and driving experience when idling, as existing systems switch off the fuel cell to conserve energy, leading to delayed full power recovery.
Innovation Solution
A method for operating a fuel cell vehicle that adapts idling modes based on dynamic requirements, using surroundings detection systems and driver inputs to optimize fuel cell system efficiency and start-up times, allowing for reduced energy consumption while maintaining driving dynamics by converting electrical energy into reactive power and managing secondary consumers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the fuel cell system is switched off during idling to save energy, then energy consumption is reduced, but driving dynamics deteriorate due to delayed power recovery
Solution Approach 1:
The patent applies dynamics by implementing multiple idling operating modes (first and second idling modes) that can be dynamically switched based on detected maximum dynamics requirements. The system transitions between different operational states rather than remaining static, allowing optimal adaptation between energy saving and power readiness based on real-time driving conditions.
Solution Approach 2:
The system changes operational parameters by switching between different idling modes with distinct characteristics. The control unit adjusts system parameters such as component activation states and power availability based on the detected dynamics requirement, enabling the fuel cell system to operate at different performance levels during idling.
2Speed
If high electrical voltages are maintained during idling, then driving dynamics are improved, but service life is reduced
Solution Approach 1:
The system varies electrical voltage parameters during idling by selecting between different operating modes. During first idling mode, the system maintains lower voltages to extend service life, while second idling mode allows higher voltages for improved driving dynamics when required by traffic situations or driver preferences.
Solution Approach 2:
The patent implements dynamic voltage management by continuously monitoring maximum dynamics requirements and adjusting voltage levels accordingly. The system transitions between voltage states based on real-time conditions rather than maintaining a fixed voltage level, optimizing both longevity and performance.
3Use of energy by moving object
If the fuel cell system operates in a mode optimized for efficiency during idling, then energy consumption is reduced, but power availability is limited
Solution Approach 1:
The system dynamically adjusts power availability based on detected dynamics requirements. The control unit switches between first and second idling modes, where the second mode provides higher power availability when maximum dynamics requirements indicate potential need for rapid acceleration or power demand.
Solution Approach 2:
The patent changes operational parameters including power output levels by selecting different idling modes. The system adjusts power availability parameters according to traffic situation analysis and driver behavior patterns, enabling efficient power management that responds to actual driving needs.
Data Source
AI summary
A method for operating a motor vehicle includes the steps of registering a maximum dynamics requirement and adapting the idling operating mode of a fuel cell system of the motor vehicle on the basis of the maximum dynamics requirement. In the first maximum dynamics requirement, lower dynamics are required than in the second maximum dynamics requirement. In the first maximum dynamics requirement, the fuel cell system is operated in a first idling operating mode. In the second maximum dynamics requirement the fuel cell system is operated in a second idling operating mode. The fuel cell system is operated more efficiently in the first idling operating mode than in the second idling operating mode.