I was doing some patent and trademark research today for a project I am working on. Out of curiousity I search the database for recent patents with the keyword BMW. As expected a whole bunch came up. But this one is brand new and highly pertinent to this thread.
A patent was issued to Robert Bosch for :
Method and device for operating an internal combustion engine using a plurality of fuels
Abstract
A method for operating an internal combustion engine is provided, such as, for example, in a motor vehicle, in which at least two different fuels are simultaneously supplied to at least one combustion chamber of the internal combustion engine.
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Note the word SIMULTANEOUSLY!! - If you want to see the patent -
Patent
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BACKGROUND INFORMATION
In conventional bi-fuel systems, an internal combustion engine may alternatively be operated either with only a first fuel or with only a second fuel.
It may be desirable, such as, for example, in the field of automotive technology, not only to reduce the pollutant emission on the basis of the fuel choice, but also to extend the range of the vehicle on one tank filling. This range may be required to be large enough so as not to limit the mobility of the motor vehicle on the basis of an existing fuel-supply network.
For this purpose, an EXPO.TM. vehicle of the BMW AG company may be alternatively operated using fuel or pure hydrogen. The switchover between exclusive fuel operation and exclusive hydrogen operation may be implemented by the driver.
In exclusive hydrogen operation, CO2--, CO-- and HC-emissions do not occur. Furthermore, the NO.sub.X emission may be greatly reduced. However, the number of service stations providing hydrogen may be few, such as, for example, in rural areas, so that the mobility of the vehicle in exclusive hydrogen operation may be limited as a result. In contrast, in exclusive gasoline operation, the existing comprehensive supply network may be utilized. However, in exclusive gasoline operation, the pollutant emission is considerably higher than in pure hydrogen operation.
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