The Faten Mouldi Derouaz hybrid engine project is gaining attention across Tunisia and abroad. The Tunisian engineer and researcher recently secured a United States patent for a hybrid engine that can operate using four different energy sources. The system works with gasoline, diesel, electricity, and recycled cooking oil transformed into biofuel.

The invention enters an important global discussion about cleaner transportation and energy flexibility. While many companies focus only on electric mobility, this project explores how different energy systems can work together inside a single engine.

According to recent interviews, the idea started after a fuel-related mechanical issue with her own car in 2021. Instead of treating it as a simple accident, Faten Mouldi Derouaz began researching fuel compatibility and engine efficiency. Over the next three years, she developed a working system that combines mechanics, artificial intelligence, and energy optimization.

The Faten Mouldi Derouaz hybrid engine stands out because it does not depend on one fuel source. The engine adapts to different forms of energy depending on availability and usage needs.

This flexibility matters today. Many countries still face limits in electric charging infrastructure. Fuel prices also continue to fluctuate. In this context, hybrid systems remain an important part of the automotive industry.

The use of recycled cooking oil is another important aspect of the project. Biofuel alternatives already exist, but they often remain difficult to integrate into everyday transportation. By including recycled oil within a multi-source engine, the invention proposes a more practical approach to alternative fuel use.

Receiving a United States patent represents an important achievement in engineering research. The process remains highly competitive, especially in sectors linked to energy and mobility.

For Tunisia, the project also highlights the strength of local scientific talent. Tunisian researchers and engineers continue to contribute to international innovation across different industries, even when research opportunities remain limited.

However, the importance of this invention goes beyond representation. The project addresses a real industrial challenge. Car manufacturers around the world are still searching for ways to balance sustainability, affordability, and infrastructure realities.

The Faten Mouldi Derouaz hybrid engine responds directly to these concerns through adaptability rather than relying on a single technological solution.

Electric vehicles dominate many discussions about the future of transportation. Yet global transitions rarely happen through one system alone. Many regions still depend on mixed energy infrastructures and hybrid technologies.

This is why projects focused on flexibility continue to attract attention. Multi-source systems can help reduce fuel dependency while making transportation more accessible in different economic environments.

Faten Mouldi Derouaz’s work reflects this larger shift inside the automotive industry. The project does not present technology as spectacle. Instead, it focuses on solving practical engineering problems through research and experimentation.

In many ways, that is what gives the invention its relevance today.