Caterpillar Inc has received certification by the United States Environmental Protection Agency for the company's third engine equipped with Advanced Combustion Emissions Reduction Technology (ACERT). With this certification, Caterpillar said it is the first engine manufacturer to offer 2004 model year clean diesel engines that are fully EPA-compliant in both the heavy- and medium-duty truck categories.

The third EPA-certified Caterpillar engine with ACERT technology is the C15 engine. Full production of the engine, offered in the 435- to 550-horsepower range, will begin in the third quarter of 2003.

All Caterpillar on-highway truck and bus engines will be equipped with ACERT technology by fourth-quarter 2003. The technology will also be used as the foundation to meet future emissions regulations for the company's entire diesel engine product line.