COLUMBUS, Ind. (May 21, 2002) - Cummins Inc. (NYSE:CUM) announced today that it has submitted its 5.9 liter ISB engine for certification to the Environmental Protection Agency's (EPA) 2.5-gram NOx+NMHC standard. Production will begin upon receipt of the certification, which is expected early this summer. Cummins began sending prototype engines to vehicle manufacturers more than a year ago, enabling them to test their installation processes and prove the engine's capability well ahead of the deadline.

"By submitting the application for certification early, we again demonstrate our commitment to delivering proven, reliable products to our customers." said Thomas Kieffer, Executive Director - Marketing at Cummins. "And customers will love this engine because they can maintain their maintenance intervals, have better performance and up to 2% better fuel economy."

The new ISB was introduced in Europe more than a year ago and is proving to be a performance and reliability leader. To meet the EPA emissions standard, a cooled exhaust gas recirulation (EGR) subsystem was added. In addition to the base engine experience in Europe, the new ISB with the cooled EGR subsystem will have more than one million field test miles by time of production.

"The reputation of this product is excellent," said Kieffer. "We are looking forward to a successful launch in North America."

The 5.9 liter ISB is designed to meet the needs of medium-duty truck, step van and bus customers. While building on a strong reputation, the next generation of the ISB offers some new features including:

  • High Pressure Common Rail Fuel System - with multiple injection capability for improved performance, lower emissions and reduced noise.
  • Variable Geometry Turbocharging (VGT) - on ratings of 245 hp and above the VGT offers reliability and durability using a sliding nozzle design.
  • Rear Gear Train - with the cam, fuel pump and accessory drives in the rear of the engine for increased accessory drive capability and lower noise.
  • Cooled EGR- which reduces exhaust gas temperatures before reintroducing it back into the combustion chamber for significantly lower emissions.

The new ISB offers horsepower ratings from 185 to 275 and torque from 420 to 660 lb-ft. In addition to its outstanding power and performance, the ISB maintains its low cost of ownership. The new ISB offers as much as 2% improvement in fuel economy with 15,000-mile oil change intervals still standard. Furthermore, the new ISB is up to 80% quieter than its predecessor.

On April 2 Cummins announced that its ISX engine became the first certified engine to the new EPA standard. At that time the company stated that it would certify the ISB engine mid-summer, and the ISM engine prior to the October deadline. The company continues on its path to meet these commitments.

A global power leader, Cummins Inc. is a corporation of complementary business units that design, manufacture, distribute and service electrical power generation systems, engines and related technologies, including fuel systems, controls, air handling, filtration and emissions solutions. Headquartered in Columbus, Indiana (USA), Cummins serves its customers through more than 500 company-owned and independent distributor locations in 131 countries and territories. With 24,900 employees worldwide, Cummins reported sales of $5.7 billion in 2001. Press releases by fax may be requested by calling News on Demand (toll-free) at 888-329-2305. Cummins home page can be found at