Fuel Rating Calibrator Signal Simulator for Pickup Degradation
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Solution Overview
Problem
The existing methods for measuring fuel rating by octane or cetane are prone to inaccuracies and costs due to pickup degradation, signal chain errors, and machine variability, leading to costly troubleshooting and low precision in fuel blending processes.
Innovation Solution
A data acquisition system with a calibrator that generates a known time-varying signal to mimic combustion events, allowing for calibration without a running test engine, thereby reducing noise and variability, and enabling more accurate fuel rating determinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detonation pickup is used to sense pressure or vibration from the combustion chamber, then fuel rating measurement is enabled, but the pickup degrades or fails due to elevated temperatures and vibration
Solution Approach 1:
The patent uses a signal generator to create an artificial calibration signal that copies the characteristics of a real detonation pickup signal. This allows the data acquisition system to be calibrated without requiring the actual pickup to be exposed to harsh test conditions, thereby improving reliability while avoiding the harmful effects of temperature and vibration exposure during calibration operations.
2Measurement precision
If a running test engine is used to provide signals for calibration, then the data acquisition system can be calibrated, but the process is time-consuming and requires extensive testing
Solution Approach 1:
The patent implements preliminary action by pre-programming the signal generator with calibration signals that simulate various fuel rating conditions. This allows the data acquisition system to be calibrated immediately without requiring a running test engine, significantly reducing calibration time while maintaining measurement precision through the use of accurately simulated signals.
3Measurement precision
If statistical analysis is used to determine machine precision, then measurement accuracy can be achieved, but the process is complex and requires multiple measurements
Solution Approach 1:
The patent extracts the calibration function from the complex statistical analysis process by using a signal generator to provide known reference signals directly to the data acquisition system. This simplifies the calibration process by removing the need for multiple measurements and statistical analysis, while still achieving high measurement precision through direct comparison with known standards.
Data Source
AI summary
A fuel quality rating testing system and related methodology. The system comprises a data acquisition system, comprising: (i) circuitry for receiving a time-varying signal from a pickup, the pickup for coupling to a test engine; and (ii) circuitry for determining a fuel rating in response to the time-varying signal. The fuel quality rating testing system also comprises a communications path coupled to the fuel quality rating testing system and a calibrator.