Water-Cooled Hydrogen Engine Patent Filed by Toyota

Home > Industry Analysis > Content

【Summary】Toyota has filed a patent for a water-cooled hydrogen combustion engine that includes water injection valves. The patent explains that water can be injected during the opening or closing of the intake valve. Toyota is not concerned if water enters the cylinder as it will evaporate if the droplets are small enough. The patent is for a hydrogen combustion engine, which differs from the hydrogen fuel engine found in the Toyota Mirai.

FutureCar Staff Oct 05, 2023 6:18 AM PT

Water-Cooled Hydrogen Engine Patent Filed by Toyota

Toyota has recently filed a patent application with the United States Patent and Trademark Office for a new engine design. The patent reveals that the engine includes water injection valves connected to the intake ports of the combustion chamber. CarBuzz was the first to discover this patent.

In the patent, Toyota explains 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 constantly spraying into the engine. Toyota assures that if water does enter the cylinder, 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 is not the same as the engine found in the Toyota Mirai. Instead, this is a hydrogen combustion engine, which has a different design altogether. Essentially, it operates similarly to a conventional combustion engine, but utilizes hydrogen gas to generate the necessary explosions. Earlier this year, Toyota showcased an AE86 Concept vehicle equipped with a hydrogen combustion engine.