Engine Controller Calibration Lock for Emissions Compliance
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Solution Overview
Problem
Existing engine systems face challenges in meeting multiple emissions regulations due to the need for different hardware and calibration for varying regional standards, leading to complex manufacturing and potential non-compliance risks from unauthorized recalibration.
Innovation Solution
A controller system that stores a permanent emissions level calibration parameter, compares it with new settings, and enforces compliance by allowing only authorized recalibrations, preventing tampering through secure storage and inducements for non-compliant updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple variations of engines are created to meet different emission regulations, then compliance with regional standards is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The controller is designed with a universal architecture that can adapt to multiple emission standards through software calibration parameters rather than hardware variations. The system uses a single controller platform that can be configured for different emission regulations (Euro 5, Euro 6, etc.) by loading appropriate calibration data, eliminating the need for multiple specialized engine variations.
Solution Approach 2:
The invention changes the approach from hardware-based adaptation to parameter-based adaptation. By storing original calibration parameters securely and comparing them against received calibration data, the system allows flexible compliance with different emission standards through parameter changes rather than physical modifications, simplifying the overall device architecture.
2Adaptability or versatility
If calibration parameters can be updated freely, then system adaptability is improved, but risk of unauthorized recalibration and emission non-compliance increases
Solution Approach 1:
The system takes preliminary anti-action by storing original calibration parameters in secure memory before any update occurs. This pre-established reference allows the controller to verify and reject unauthorized calibration attempts, preventing emission non-compliance before it can happen. The secure storage acts as a preemptive safeguard against malicious or erroneous recalibration.
Solution Approach 2:
The calibration update process incorporates feedback mechanisms where the controller compares received calibration data against securely stored original parameters. This feedback loop ensures that only authorized updates that maintain emission compliance are accepted, while unauthorized attempts are detected and rejected, maintaining reliability while allowing legitimate adaptability.
3Reliability
If secure storage of calibration parameters is implemented, then protection against tampering is improved, but memory management complexity increases
Solution Approach 1:
The memory system is segmented into distinct functional areas: secure read-only storage for original calibration parameters, writable storage for operational calibration data, and separate regions for calibration update buffers. This segmentation isolates the critical protection function from general memory management, reducing overall complexity while maintaining strong security for the original parameters.
Data Source
AI summary
A system includes an exhaust aftertreatment system coupled to an engine and a controller. The controller includes at least one processor coupled to at least one memory device storing instructions that, when executed by the at least one processor, cause the controller to perform operations including: determine an intended emissions level calibration parameter; receive a new emissions level calibration parameter; compare the intended emissions level calibration parameter to the new emissions level calibration parameter; and generate an alert based on the comparison.