Patent ID: 7257942
Filing Date: 2007-08-21
Classification: B01D,F01M,F01N,F02B,Y10S

Abstract:
1. A method for retrofitting a model year 1991-2003 on-highway diesel engine rated to produce between 150 and 600 horsepower, the diesel engine drawing intake air through an air intake structure including an air filter for filtering the intake air, the method comprising: (a) installing a blow-by filter for filtering blow-by gas generated by the diesel engine to reduce blow-by gas emissions, the blow-by filter being installed in gas-flow communication with a blow-by vent structure of the diesel engine and in further gas-flow communication with the engine air intake structure; and (b) installing a catalytic converter for treating exhaust gas generated by the diesel engine to reduce exhaust gas emissions, the catalytic converter being installed in gas-flow communication with an exhaust port structure of the diesel engine; wherein the blow-by filter and the catalytic converter provide at least a 25 percent reduction in total engine particulate matter emissions.