DDC answers EGR concerns; applies for Series 60 engine certification

| Wednesday, August 14, 2002

Detroit Diesel Corp. (DDC) has submitted applications to the Environmental Protection Agency for emissions certification of its Series 60 diesel engines.

These initial applications will cover 20 of the currently available Series 60 engine ratings. All will be fully compliant to the October 2002 emission requirements, the company said. Additional ratings will be submitted for certification in the following months.

By Oct. 1, DDC said it will have accumulated approximately eight million test miles on its fleet of test vehicles equipped with October 2002 prototype engines. Also by Oct. 1, 27 different fleets will have engines in operation, in addition to the factory-owned test units.

"Of course, we are well aware of the questions some truckers have about the Series 50 and 60 engines equipped with exhaust gas recirculation (EGR)," said John Morelli, vice president of the Series 60 2002 Engine Program. "For those who may not be aware of it, EGR has been used on the Series 50 since 2000. We have over 2,500 units in operation and I want to reassure the trucking industry that these Series 60 and 50 engines are excellent products.

"I know there has been a great deal of discussion about increased maintenance intervals, along with questions about reliability and life to overhaul. But, now that we have all these test miles under our belt, we are confident that the new engines will continue to meet our customers' expectations. The warranty on these engines remains exactly the same - not even one word in the warranty has changed. There is no difference in the recommended oil change intervals because the soot concerns have not materialized. There is no change in the required maintenance schedule and there are no additional parts subjected to maintenance requirements ..."

Morelli said the life of the piston ring is actually the key to long engine life. He said the company has confirmed ring face wear is 78 percent lower on the EGR engines when compared to current engines.

In addition, he said the company reduced the weight of the Series 60 by an additional 25 pounds, so it now weighs several hundred pounds less than the other big-bore engines.

On fuel economy Morelli said, "We are currently within a couple percentage points of our target. And, we will continue to fine tune the engine and improve the combustion process."

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