APU Authentication via ECU Passcode Validation
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Solution Overview
Problem
The OEM lacks control and accurate billing data for auxiliary power units (APUs) and engines due to unauthorized repairs and potential swapping between vehicles, leading to difficulties in tracking usage hours and authenticating genuine components.
Innovation Solution
A system that authenticates APU and engine components by detecting electronic connections, comparing start-up program passcodes, and re-authenticating upon new passcode storage, ensuring only authorized components can operate by erasing and updating passcodes when disconnected and reconnected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If APU components are allowed to be replaced and repaired in the field by FSE or MRO shops, then ease of repair is improved, but reliability deteriorates due to unauthorized repairs and potential counterfeit parts
Solution Approach 1:
The system pre-configures unique passcodes in the ECU memory before the APU is deployed. These passcodes serve as authentication credentials that are validated before allowing repair operations or component replacement, ensuring that only authorized service providers can perform repairs and that genuine components are used.
Solution Approach 2:
The system implements a feedback mechanism where the ECU continuously monitors and validates passcodes during operation and repair processes. When a component is replaced or repaired, the system verifies the authenticity of the new component through passcode validation, providing immediate feedback on whether the component is genuine and authorized for use.
2Adaptability or versatility
If APU components can be swapped between vehicles, then adaptability is improved, but loss of information occurs regarding usage hours and billing data
Solution Approach 1:
The system uses passcodes as an intermediary mechanism to track and transfer usage information when APU components are swapped between vehicles. The passcode validation process serves as a mediator that ensures proper attribution of usage hours and billing data to the correct vehicle and owner, preventing information loss during component interchange.
Solution Approach 2:
The system creates and manages digital copies of authentication credentials (passcodes) that are stored in the ECU memory. These passcode copies enable the system to verify component identity and track usage information across different vehicles, ensuring that billing data and usage hours are accurately maintained regardless of component location.
3Reliability
If passcode validation is implemented in the ECU, then reliability is improved through authentication, but device complexity increases due to memory and processing requirements
Solution Approach 1:
The system implements passcode validation locally within the ECU memory of each APU component, rather than requiring centralized validation servers. This local quality approach allows each component to independently verify its own authentication credentials, reducing the need for complex external validation infrastructure while maintaining security.
Solution Approach 2:
The system uses simple parameter-based authentication through passcodes stored in ECU memory, rather than implementing complex cryptographic protocols. By changing the authentication approach to use straightforward passcode comparison, the system achieves reliable authentication with minimal impact on device complexity and processing requirements.
Data Source
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AI summary
Systems and methods are provided for validating a vehicle component. The system includes a vehicle electronic control unit (ECU) in electronic communication with a power unit via a communications bus. The vehicle ECU is configured to detect an electronic connection between the vehicle ECU and the power unit and transmit a power start up signal to the power unit when the power unit is authenticated to start up. The power unit is authenticated to start up when a power unit start-up program passcode stored in a memory of the vehicle ECU matches a predetermined ECU passcode. The vehicle ECU is configured to erase the power unit start-up program passcode from the memory when the power unit is disconnected from the communications bus. The vehicle ECU is configured to re-authenticate the power unit to start up when a new power unit start-up program passcode is stored in the memory that matches another predetermined ECU passcode.