Fuel Gas Supply Control with Segmented Pressure Loops
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Solution Overview
Problem
Existing fuel gas supply systems for fuel cells require extensive redevelopment when characteristics such as injector specifications or piping shape change, leading to increased development man-hours and costs when applied to different applications.
Innovation Solution
A fuel gas supply system with independent single input-single output structures for each state quantity control, using a controller to manage hydrogen partial pressure, inlet pressure, and flow rate through separate components like injectors and valves, with machine learning models to adjust feedback gains for improved control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire fuel gas supply system is modeled for control, then control accuracy is improved, but device complexity and development time increase significantly
Solution Approach 1:
The patent divides the fuel gas supply system into independent single-input single-output control units, each managing a specific state quantity (hydrogen partial pressure, inlet pressure, flow rate) through dedicated components. This segmentation allows each control unit to operate independently with its own simple model, avoiding the need for a complex overall system model while maintaining effective control.
Solution Approach 2:
The patent extracts and separates the control of each state quantity from the integrated system model. By taking out individual control loops for hydrogen partial pressure, inlet pressure, and flow rate, the system replaces a single complex model with multiple simple models, reducing overall system complexity while preserving control accuracy for each parameter.
2Measurement precision
If the entire fuel gas supply system is modeled for control, then control accuracy is improved, but development man-hours increase when system characteristics change
Solution Approach 1:
By segmenting the control system into independent units, the patent enables modular adaptation. When system characteristics change (e.g., injector specifications or piping shape), only the affected single-input single-output control unit needs to be reconfigured, not the entire system model. This dramatically reduces development time while maintaining control accuracy.
Solution Approach 2:
The patent creates a dynamically adaptable control architecture where each control unit can be independently adjusted. This dynamic structure allows rapid reconfiguration when system characteristics change, eliminating the need for time-consuming full-system remodeling while preserving control precision.
3Quantity of substance
If multiple components are controlled together, then multiple state quantities are controlled, but control complexity increases
Solution Approach 1:
The patent segments the control of multiple state quantities into separate single-input single-output units. Each unit controls one state quantity (hydrogen partial pressure, inlet pressure, or flow rate) through one component, maintaining simple control structures while collectively managing multiple state quantities through parallel independent units.
Solution Approach 2:
The patent transitions from a single-dimension integrated control model to a multi-dimension parallel control architecture. By controlling multiple state quantities across separate independent units rather than through one complex model, the system manages complexity by distributing control functions across multiple simple dimensions.
Data Source
AI summary
A fuel gas supply system for a fuel cell includes an injector, an inlet pressure acquisition unit, a discharge valve, a hydrogen partial pressure acquisition unit, and a controller. The controller is configured to stop driving the injector when a hydrogen partial pressure reaches or exceeds a first upper limit value in a state where the injector is being driven, and start driving the injector when the hydrogen partial pressure falls to or below a first lower limit value in a state where the injector is stopped. The controller is configured to open the discharge valve when an inlet pressure reaches or exceeds a second upper limit value in a state where the discharge valve is closed, and close the discharge valve when the inlet pressure falls to or below a second lower limit value in a state where the discharge valve is open.