Water-Cooled Hydrogen Combustion Engine Patent Filed by Toyota

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【Summary】Toyota has filed a patent for a water-cooled hydrogen combustion engine, which includes water injection valves. The patent explains that water can be injected either during the intake valve opening or closing, and if water enters the cylinder, it will evaporate due to small droplets. The engine is different from the one used in the Toyota Mirai and operates similarly to a regular combustion engine but uses hydrogen gas for explosions.

FutureCar Staff Oct 04, 2023 4:17 PM PT

Water-Cooled Hydrogen Combustion Engine Patent Filed by Toyota

Toyota has recently filed a patent application for a unique engine design that incorporates water injection valves into the intake ports of the combustion chamber. This discovery was made by CarBuzz, who found the patent at the United States Patent and Trademark Office.

The patent details that the water can be injected into the engine either when the intake valve is opening or when it is closing. This means that the water will not be continuously sprayed into the combustion chamber. Toyota reassures that if water enters the cylinder, it is not a major concern as it will evaporate if the droplets are small enough. In the event that water reaches the crankcase, it may mix with the oil, but it is more likely to evaporate due to the internal pressure.

It is important to note that this particular patent is for a hydrogen fuel engine, but it differs from the engine found in the Toyota Mirai. The patented design is for a hydrogen combustion engine, which is a completely separate design. Essentially, it operates similarly to a conventional combustion engine but utilizes hydrogen gas to generate the necessary explosions. Toyota had previously showcased a hydrogen combustion engine in an AE86 Concept earlier this year.