Diesel particulate filters (DPFs) and diesel oxidation catalysts (DOCs) are exhaust after-treatment devices that reduce emissions from diesel engines.
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Diesel Particulate Filter General Information (PDF)(2 pp, 635 K, May 2010)
- Diesel Particulate Filter Installation (PDF)(2 pp, 698 K, May 2010)
- Diesel Particulate Filter Operation and Maintenance (PDF)(2 pp, 615 K, May 2010)
- Diesel Oxidation Catalyst General Information (PDF)(2 pp, 755 K, May 2010)
- Diesel Oxidation Catalyst Installation, Operation, and Maintenance (PDF)(2 pp, 794 K, May 2010)