Could Toyota's hydrogen engine save combustion by converting engines?
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Toyota has developed a hydrogen combustion engine with nearly negligible harmful emissions. The project involved a Toyota Corolla Sport which participated in a 24 hour endurance race, using a 1.6L turbo inline threecylinder out of the GR Yaris. The idea was to convert a gasoline engine to a hydrogen engine, as an alternative to creating new electric cars. With hydrogen combustion, oxygen and hydrogen are burned, providing useful work, with water as the only main emissions.

Naoaki Ito, one of the lead engineers on the project, puts it well: “For this hydrogenpowered engine, the engine itself remains the same as before. Our concept for this project was to create a hydrogen engine by using as much of the existing internal combustion technology as possible. We thought that achieving this would enable the conversion of existing car engines to hydrogen, providing a powerful weapon in the quest for carbon neutrality.”

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References:
Toyota Hydrogen Press Release https://global.toyota/en/newsroom/cor...
Toyota Hydrogen Conversion https://toyotatimes.jp/en/insidetoyot...
Toyota 24 Hour Race Results https://toyotatimes.jp/en/insidetoyot...
Hydrogen Combustion Methods https://www.mdpi.com/20763417/9/22/4842
Hydrogen Carbon Emissions https://www.avl.com/documents/4053291...
Gas Carbon Emissions https://climatekids.nasa.gov/review/c...
JRC WellToWheels Report https://publications.jrc.ec.europa.eu...
Hydrogen Production Costs https://doi.org/10.1016/j.rser.2016.0...
Mirai Fuel Tank Weight https://insideevs.com/news/323973/toy...

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