Fuel Cell Vehicle Controller for Sensor Error Compensation
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Solution Overview
Problem
Fuel cell vehicles face issues due to measurement errors in hydrogen pressure sensors, leading to inaccurate hydrogen supply and reduced durability of the fuel cell stack, especially when parked for extended periods without compensation.
Innovation Solution
A controller system that determines the cause of current limits in the fuel cell vehicle by monitoring cell voltage and pressure sensor measurements, turning on a warning light for stack failures and compensating measurement errors by performing hydrogen purges and adjusting hydrogen supply pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the fuel cell vehicle operates based on hydrogen pressure measurement without compensation during extended parking, then the operation continues without interruption, but the measurement error accumulates leading to insufficient hydrogen supply and reduced stack durability
Solution Approach 1:
The controller performs compensation processing of the pressure sensor measurement error before the insufficient hydrogen supply condition occurs. By detecting the parking state and proactively compensating the measurement error, the system prevents the accumulation of errors that would otherwise lead to incorrect hydrogen supply control and stack durability issues.
2Reliability
If the controller continuously monitors and compensates pressure sensor errors, then the hydrogen supply accuracy is maintained, but the system complexity and processing requirements increase
Solution Approach 1:
The compensation processing is dynamically activated based on the detected parking state rather than operating continuously. The controller monitors vehicle operation status and only performs compensation when parking is detected, adapting the system's monitoring intensity to actual operational needs and reducing unnecessary processing complexity.
3Ease of operation
If the system distinguishes between sensor error and stack failure causes, then appropriate responses can be targeted, but the diagnostic complexity increases
Solution Approach 1:
The controller proactively compensates for known pressure sensor measurement errors during parking states before these errors can manifest as symptoms indistinguishable from stack failures. By addressing the sensor error source early, the system simplifies subsequent diagnostics and enables more accurate distinction between sensor issues and actual stack problems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents fuel cell stack durability issues by accurately identifying and addressing measurement errors in hydrogen pressure sensors, ensuring reliable operation and extending the lifespan of the fuel cell stack.
Implementation Method 1
a fuel cell stack configured to generate electricity using a chemical reaction between hydrogen and oxygen
Data Source
AI summary
An apparatus for controlling driving of a fuel cell vehicle and a method thereof are provided. The apparatus includes a fuel cell stack that generates electricity using a chemical reaction between hydrogen and oxygen and a pressure sensor that measures a pressure of hydrogen supplied to the fuel cell stack. A controller determines whether a current limit is caused by a failure of the fuel cell stack or a measurement error of the pressure sensor when the current limit occurs in the fuel cell stack.