Fuel Aging Estimation via Engine Control Unit
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Solution Overview
Problem
Existing fuel quality determination systems in vehicles are inefficient as they require additional components and complex setups, leading to increased manufacturing costs and potential misdiagnosis of fuel quality issues, and do not effectively alert drivers to consume aged fuel quickly enough to maintain performance and economy.
Innovation Solution
A method to estimate fuel aging in a vehicle's tank by calculating the circulation percentage, temperature, and time since fill-up, alerting the driver to adjust driving behavior and engine parameters to consume aged fuel more quickly, and providing instructions for refilling or adding fuel additives through the infotainment system or cellular device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a system with extra fuel tank and fuel reservoir is used to separate and manage fuel quality, then fuel quality can be monitored and managed, but packaging restraints in vehicle are increased
Solution Approach 1:
The patent combines the fuel quality monitoring function with the existing engine control unit, eliminating the need for separate fuel tank and reservoir systems. The ECU integrates sensor data from oxygen sensors and other engine parameters to determine fuel quality, thereby maintaining fuel quality management capabilities while preserving vehicle packaging space.
Solution Approach 2:
The existing engine control system is made multi-functional by enabling it to perform both engine control and fuel quality determination. The ECU utilizes existing sensors (oxygen sensors, mass airflow sensors) and engine operating parameters to simultaneously manage engine operation and assess fuel quality, removing the need for dedicated fuel quality monitoring hardware.
2Reliability
If a system with separate fuel tank and fuel reservoir is implemented, then fuel quality can be determined, but manufacturing costs are increased
Solution Approach 1:
The system uses existing engine components and sensors to self-determine fuel quality without requiring additional dedicated hardware. The oxygen sensors and mass airflow sensors already present in the engine system are utilized to infer fuel quality based on combustion characteristics, making the system cost-effective by leveraging existing infrastructure.
Solution Approach 2:
The patent uses combustion exhaust gases as an intermediary to indirectly measure fuel quality. Instead of directly analyzing fuel composition, the system measures oxygen levels in exhaust gases and uses this information to infer fuel quality, providing a cost-effective indirect measurement approach.
3Reliability
If multiple pumps, valves, and passages are added for fuel separation, then fuel quality management is enabled, but the number of components that may degrade over time is increased
Solution Approach 1:
The patent extracts the fuel quality determination function from the physical fuel storage system and relocates it to the engine control software. By removing the need for separate fuel tanks, reservoirs, pumps, and valves, the system eliminates multiple degradable components while maintaining fuel quality management capabilities through software-based monitoring of combustion parameters.
4Reliability
If fuel quality differences are measured between two fuels, then fuel quality can be monitored, but misdiagnosis of fuel quality issues may occur
Solution Approach 1:
The system continuously monitors oxygen sensor readings and engine operating parameters to provide feedback on fuel quality. By comparing actual combustion characteristics against expected values across multiple operating cycles, the system can accurately distinguish between fuel quality variations and engine component degradation, reducing misdiagnosis through continuous adaptive feedback.
Data Source
AI summary
Methods and systems are provided for calculating a fuel aging of fuel in a fuel tank. In one example, a method may include alerting a vehicle operator and/or adjusting engine operating parameters in response to a fuel aging being greater than a threshold aging.