Mazda Ends Hummm as Rotary Gives Way to Hydrogen Cells

Mazda Ends Hummm as Rotary Gives Way to Hydrogen Cells

Mazda Motor Corp. via Bloomberg

Originally developed by engineer Felix Wankel in Germany after World War II, it was also called the Wankel engine. Mazda licensed the technology in 1961 from Audi NSU Auto Union AG, then his employer and a carmaker that later formed the Audi unit of Volkswagen AG.