Abstract

The disclosure provides a method and fuel injection system for operating large internal combustion engines. It enables fuel flexibility by allowing an engine originally configured for a first main fuel, such as methanol, to operate on a different second main fuel, such as ethanol.

Key aspects of the disclosure include:

  • Heating Value Matching: The engine receives a mixture of the second main fuel and an additive, typically water. The system controls the additive quantity to ensure the mixture's heating value remains within ±10% of the first main fuel's heating value.

  • Dynamic Control: Because the lower heating value cannot always be directly measured during operation, a control unit dynamically adjusts the additive volume based on real-time operating parameters.

  • Monitored Parameters: The required additive amount is calculated using values indicative of the heating value, such as fuel command deviations, cylinder pressure curves (e.g., peak firing pressure), or NOx emissions.

By matching the volumetric energy content, the engine maintains consistent combustion stability and power output across different fuels.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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