Abstract
A novel, closed-cycle, hydride-based cold-start heater for automotive catalysts is described. The device consists of coupled AB 5 and β-Ti alloy beds and is designed to store a small part of the automotive exhaust heat for later release during cold-start. Without the significant use of electric power, it can heat the catalyst bed to operating temperature in a few seconds thereby greatly reducing cold-start hydrocarbon emissions. A full-sized prototype was built and tested both on the bench and in an FTP automobile. ULEV performance was achieved with a 2.2 L, 4-cylinder vehicle.
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