Engineers from Ford Motor Co. and the University of Texas at Austin College of Engineering have invented a mini oil refinery that attaches to the engine to cut cold-start emissions by about half. The device separates the more volatile molecules in gasoline and stores them in a separate tank to use when starting a cold engine. The work was spurred by a theory that engineers have long held that the ideal engine would use two types of fuel. One would be a highly volatile fuel for starting the ...

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