The ACERT™ Technology employed by the new Caterpillar® engine line for 2007 remains a systems solution, refined to meet the more stringent 2007 Environmental Protection Agency (EPA) emissions regulations. Two major enhancementsa refined combustion process called Clean Gas Induction (CGI) and a self-regenerating Diesel Particulate Filter (DPF)ensure that Cat® engines meet the 2007 emissions regulations without sacrificing the reliability, durability and fuel economy advantage Caterpillar engines always have delivered,