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:
“The only human beings I have thoroughly admired and respected in the world have been those who carried the load of the world with a smile, and who, in the face of anxieties that would have knocked me clean out, never showed a tremor. Such men and women end by owning us, soul and body, and our allegiance can never be shaken. We are only too glad to be owned. Religion is nothing but this.”
—Henry Brooks Adams (1838–1918)
“The very presence of guilt, let alone its tenacity, implies imbalance: Something, we suspect, is getting more of our energy than warrants, at the expense of something else, we suspect, that deserves more of our energy than we’re giving.”
—Melinda M. Marshall (20th century)