Diesel engines are going to get more complex, more expensive and maybe slightly less efficient in 2007 when stricter emission laws take effect, International Truck and Engine Corp. says.
In 2007, diesel engines have to run almost as clean as gasoline engines. To do that, they will need ultralow sulfur fuel with 15 parts per million of sulfur. The content of sulfur in todays fuel is about 300 parts per million.
International builds the 6.0-liter PowerStroke diesel V-8 engine for Ford Motor Co. as well as diesel engines for heavy-duty trucks. In a conference call with reporters on Tuesday, Patrick Charbonneau, Internationals chief technical officer, predicted the company will meet 2007 standards as long as low-sulfur fuel is available in at least 80 percent of U.S. filling stations.
Charbonneau said International engineers expect to meet the tougher emissions standards by focusing on:
Charbonneau said these emission-reduction technologies will be used for light-duty engines, including those in Fords F Series pickups and Excursion SUV, and heavy-duty engines used for commercial vehicles.
All the changes will add cost to diesel engines, which already cost $4,000 more than gasoline engines.
Charbonneau says although International knows it must add equipment to diesel engines to meet the new standards, the company is looking for ways to keep costs from rising excessively.
International can use the current 6.0-liter PowerStroke engine architecture for the F Series even after the emission laws change. This engines intake and exhaust systems can be upgraded without major changes to its cylinder block and heads, International says.
But Charbonneau estimates that fuel economy (in diesels with stricter emissions)could fall about 3 percent. We usually project some step backwards in overall fuel economy, but what happens is we usually find ways to overcome it."