“It is possible that a hydrogen opposed piston combustion engine would be placed on par with a ZEV powertrain in terms of criteria emissions and net CO2,” said Achates Chief Commercial Officer Laurence Fromm. Nearly two months after revealing its near-zero 10.6-liter opposed-piston diesel engine inside the engine bay of a Peterbilt 579 operated by Walmart, the San Diego based company announced that it would be testing hydrogen next.California-based Achates Power, which recently announced the formation of the Hydrogen Opposed Piston Engine Working Group, also expressed optimism in reaching increasingly tough emissions goals with hydrogen combustion. “As a large proportion of the vehicles currently being produced still have combustion engines, the engine itself must become an essential means of combating the climate crisis,” Korn wrote in a June 2020 article posted on, a scholarly publication focusing on scientific, technical and medical topics. Thomas Korn, engineer and founder of hydrogen engine company Keyou in Munich, Germany, supported the idea during the height of the COVID pandemic. “This is because the heat and pressure of combustion, combined with nitrogen in the air, produce NOx emissions, and urea-SCR emission controls are still needed (as they are on diesel-fueled engines.)”īuilding the caseWhen it comes to considering hydrogen ICE as a zero emission option in the U.S. “Commercial trucks that use hydrogen combustion engines do not count as zero emission vehicle status,” said EPA spokesperson Taylor Gillespie. “So, even if the H2 fuel became 100% renewable, the criteria pollutant emissions from the internal combustion engine would still be a problem and preclude it from counting as a ZEV.” “Our definition of ZEV only includes vehicles that have zero emissions of any criteria pollutant, precursor to a criteria pollutant, or a GHG,” CARB spokesman Alberto Larios explained. But no matter the EU's leanings, CARB and the EPA, both of which have not yet tested either of Cummins' hydrogen engines, are not impressed. It's this kind of carbon-cutting performance that has drawn support for hydrogen combustion in medium- and heavy-duty trucks from legislators in the European Union, CCJ confirmed. was produced by fossil fuels according to the U.S. In 2021, 61% of the electricity in the U.S. Hydrogen can beat all-electric’s carbon intensity scores, particularly when the grid is powered by fossil fuel sources like coal and natural gas – which tends to be the case across the country. Tom QuimbyTo help ensure low carbon intensity scores, Cummins produces renewable or green hydrogen through electrolysis, a growing method that uses electricity from renewable energy sources like solar, wind and hydroelectric to produce hydrogen from water. Cummins general manager of hydrogen engine business Jim Nebergall talked with reporters recently at the company's headquarters in Columbus, Indiana.

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