BMW CleanEnergy vehicles have both a hydrogen and a petrol tank. If one of the tanks is empty, the bivalent BMW engine unit switches over automatically to the other fuel system. One decisive advantage of the combustion engine is bivalence. It enables both hydrogen and petrol to be used, thus creating the ideal conditions for a transition from non-regenerative to regenerative drive energies. During electrolysis water is split into its components of hydrogen and oxygen. The hydrogen is stored and the oxygen is needed in the vehicle for the combustion of the hydrogen. The combustion process generates energy and water as a waste product, which returns to the natural water cycle. And so with the aid of regenerative energy suppliers, a theoretically emission-free fuel is obtained.
Famous quotes containing the words clean and/or energy:
“I became increasingly anarchistic. I began to find people of my own class vicious, people in clean collars uninteresting. I even accepted smells, personal as well as official. Everyone who came to the studio smelled either of machine oil or herring.”
—Margaret Anderson (1886–1973)
“Just as we are learning to value and conserve the air we breathe, the water we drink, the energy we use, we must learn to value and conserve our capacity for nurture. Otherwise, in the name of human potential we will slowly but surely erode the source of our humanity.”
—Elaine Heffner (20th century)