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DONALDSON COMPANY AND DETROIT DIESEL ANNOUNCE AVAILABILITY OF EPA EMISSION CERTIFIED ENGINE/PARTICULATE TRAP SYSTEM FOR URBAN BUSES

 DONALDSON COMPANY AND DETROIT DIESEL ANNOUNCE AVAILABILITY OF EPA
 EMISSION CERTIFIED ENGINE/PARTICULATE TRAP SYSTEM FOR URBAN BUSES
 MINNEAPOLIS, July 28 /PRNewswire/ -- Donaldson Company, Inc. (NYSE: DCI) and Detroit Diesel Corporation (DDC) announced today that they have received U.S. Environmental Protection Agency (EPA) heavy-duty diesel engine emission certification for their engine/particulate trap system for urban buses. The companies have also received a California Air Resources Board Executive Order certifying the engine/trap system in California.
 The diesel engine/trap system is the first such system to be emission certified by the EPA which meets the stringent 1993 U.S. EPA urban bus engine emissions standards. These emission certified engine/trap systems are in production immediately. The system will be marketed as the Detroit Diesel engine/trap system for new buses and for retrofit in urban areas with air pollution concerns.
 The Donaldson diesel particulate trap system incorporates ceramic wall-flow monolith filters with electric regeneration. The system traps particulate matter until the trap controller triggers the regeneration (cleaning) cycle. An electric heating element burns off the trapped particulates. Two filters are utilized so that one filter can trap the particulate matter while the other filter is regenerating. The system is designed so only filtered exhaust is emitted into the atmosphere.
 The 6V-92TA urban bus engine is a heavy-duty 277 horsepower diesel engine which is turbocharged and aftercooled for good fuel economy and emission control. It also uses the Detroit Diesel Electronic Control (DDEC) system for electronic fuel injection and electronic governing.
 An exhaust aftertreatment development program was announced in May 1989 between DCI, DDC and Transportation Manufacturing Corporation (TMC) in cooperation with the New York City Transit Authority (NYCTA), the New York State Energy Research and Development Authority and the New York City Department of Environmental Protection. In December 1989, NYCTA placed an order for 400 TMC buses equipped with DCI's diesel particulate trap systems and DDC's 6V-92TA engines. To date, the NYCTA program has accumulated more than 13 million miles of in-revenue service.
 Detroit Diesel engine/trap systems are operating in in-revenue service programs at a number of other transit properties in North America. These programs have accumulated more than 7 million miles of in-revenue service. The reliability and durability data provided by more than 20 million miles of in-revenue service helped Detroit Diesel decide to emission certify its engine/trap system for new transit buses.
 Detroit Diesel Corporation is a joint venture company, owned 80 percent by Penske Transportation Holdings Corp. and 20 percent by General Motors Corporation. Detroit Diesel Corporation designs, manufactures and sells heavy-duty diesel engines ranging from 5 to 2400 hp for the on-highway, industrial, construction, power generation, military and marine markets.
 Donaldson Company, Inc. is a worldwide filtration company with sales in excess of $450 million. It manufactures a variety of products including filtration and exhaust products and accessories for heavy-duty mobile equipment. Products are produced in the U.S. and at ten other locations around the world.
 -0- 7/28/92
 /CONTACT: John R. Schweers of Donaldson, 612-887-3014, or John


Mackay of Padilla Speer Beardsley, 612-871-8877 (in New York, 212-752-8338/
 (DCI) CO: Donaldson Company, Inc.; Detroit Diesel Corporation ST: Minnesota, Michigan IN: AUT SU: JVN :END


KH -- MN003 -- 3953 07/28/92 10:00 EDT
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Publication:PR Newswire
Date:Jul 28, 1992
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