Caterpillar Inc. has received 2004 certification by the U.S. Environmental Protection Agency for the company’s fourth on-highway truck and bus engine equipped with its ACERT technology.

Caterpillar was the first engine manufacturer to offer engines certified to EPA’s tougher 2004 standards, which require more stringent testing to demonstrate lower emissions over longer periods of engine operation.
The fourth EPA-certified Caterpillar engine with ACERT technology is the C13 engine, popular with general freight, or line-haul truck fleets that carry goods such as home appliances, building materials and refrigerated foods. Offered in the 335 to 430 horsepower range, the C13 is also heavily used in tanker trucks that serve the oil, petroleum and agricultural industries.
The C13 is also the engine found in vocational-class trucks including dump trucks, refuse haulers and cement mixers.
"With the certification of this engine, we are another step closer to full certification of truck and bus engines with ACERT technology," said Richard L. Thompson, Caterpillar group president with responsibility for the company’s engine division.
Earlier this year, the Caterpillar C7 and C9 engines were certified for use in on-highway trucks, school buses and transit buses. With certification of the company’s C15 engine in March, Caterpillar became the first engine manufacturer to earn EPA 2004 certification of a heavy-duty on-highway truck engine.
ACERT is a differentiated, breakthrough technology that reduces emissions at the point of combustion. All Caterpillar on-highway truck and bus engines will be equipped with ACERT technology in the fourth quarter of this year. The technology will also be used as the foundation to meet future emission regulations for the company’s entire diesel engine product line, including construction and mining machines and power generation units.
More information is available at www.cat.com.