1995-08-01

Hydrogen for Cold Starting and Catalyst Heating in a Methanol Vehicle 951956

Hydrogen is unique among alternative fuels in its ability to burn with large amounts of excess air (ultra lean burn) with no carbon-related combustion products. Hydrogen also has a unique ability to burn on the surface of a catalyst, starting from room temperature. Hydrogen may be used in highly “leveraged” ways with other alternative fuels by taking advantage of these unique properties during the crucial period just after the vehicle is started from a cold condition. A methanol vehicle was started on pure hydrogen and idled at ultra lean conditions (oxygen rich exhaust) while injecting hydrogen at the inlet to the exhaust catalyst. Over 15 kW of chemical heating power brought the catalyst to light-off temperature quickly. “Cold 505” transient emissions tests show reductions in all pollutants which far exceed the fraction of the fuel energy supplied as hydrogen.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X