The new hydrogen engine can reduce carbon dioxide and fine dust emissions by 99% and 90%, respectively
In conventional internal-combustion powertrains that use hydrogen fuel, known as a port injection engine, it burns hydrogen as fuel after mixing it with air by injecting the power through an upper inhaling port instead of the cylinder.
To remedy this, researchers injected high-pressure hydrogen directly into the combustion chamber. "This method utilizes a pre-mixture combustion that enables ultra-lean combustion and has the advantage of no pumping loss because the output is controlled by the amount of fuel injected without throttling the intake air," said the study. Also, because hydrogen gas does not exist in the intake pipe, backfire does not occur, which is a common trait in hydrogen-powered motors.
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