Hybrid Vehicle Power Control for Fuel Source Transient Reduction
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Solution Overview
Problem
Existing power control methods for hybrid vehicles fail to effectively manage transient state operations of the fuel power source, leading to inefficiencies and increased fuel consumption, as they often rely on steady-state models that do not account for the efficiency characteristics of both the engine and motor power sources.
Innovation Solution
A power control method that calculates an optimal fuel power output command by determining an average requested power value and using a weighted sum of fuel consumption and battery power to minimize equivalent fuel consumption, allowing for reduced transient operation without a transient state model, and adjusts fuel power output within allowable limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If steady-state fuel consumption maps are used for power control, then the control system is simple to implement, but fuel consumption increases during transient operations
Solution Approach 1:
The patent pre-calculates and stores transient correction values in lookup tables during the design phase. These correction values are prepared in advance based on engine operating conditions and are directly applied during transient operations without requiring complex real-time calculations, thus maintaining simple control system implementation while improving fuel consumption during transients
Solution Approach 2:
The patent modifies the steady-state fuel consumption map by applying transient-specific correction factors to create a transient-adjusted fuel consumption model. This parameter change allows the system to account for transient operating conditions while maintaining the overall structure of steady-state mapping, balancing complexity and accuracy
2Loss of energy
If transient state model is incorporated into power control, then fuel consumption during transients is reduced, but the control system becomes more complex
Solution Approach 1:
The patent pre-calculates and stores transient correction values in lookup tables during the design phase. These correction values are prepared in advance based on engine operating conditions and are directly applied during transient operations without requiring complex real-time calculations, thus maintaining simple control system implementation while improving fuel consumption during transients
Solution Approach 2:
The patent creates a simplified transient correction model that copies and adapts steady-state mapping structures rather than developing a completely new transient model. This approach reduces complexity by reusing existing data structures and calculation frameworks while incorporating transient characteristics
3Power
If fuel power source operates frequently during transients, then power demand is met, but efficiency decreases due to transient operation
Solution Approach 1:
The patent implements feedback mechanisms that continuously monitor engine operating conditions and compare actual fuel consumption against predicted values from the transient-adjusted model. This feedback allows the system to learn from past transient operations and optimize future power source selection, reducing unnecessary transient operations while maintaining power demand satisfaction
Solution Approach 2:
The patent employs dynamic power source selection strategies that adaptively determine whether to use the fuel power source or motor based on real-time operating conditions. This dynamic approach optimizes the balance between meeting power demand and minimizing transient operations, allowing the system to flexibly switch between power sources based on efficiency considerations
Data Source
AI summary
The present invention relates to a power control method and apparatus for considering transient characteristics of a hybrid vehicle, and more particularly to a power control method and apparatus for maximizing performance in an actual operating environment of a hybrid vehicle by reducing fuel power supply transients.The present invention provides a method and apparatus for effectively solving an optimal power control problem without a fuel source transient model to reduce fuel source transients and maximize the performance of a hybrid vehicle in an actual operating environment.