초록 ▼

Methods and apparatus for reducing the TPM level of a diesel engine exhaust stream by providing a suitable oxidation catalyst into the exhaust train. The oxidation catalyst may be incorporated into a thermal insulative coating on the inner surface of the exhaust train, particularly the exhaust manif

Methods and apparatus for reducing the TPM level of a diesel engine exhaust stream by providing a suitable oxidation catalyst into the exhaust train. The oxidation catalyst may be incorporated into a thermal insulative coating on the inner surface of the exhaust train, particularly the exhaust manifold and exhaust pipes prior to the turbocharger. Alternatively, when the exhaust train includes a turbocharger, the catalyst can be in a separate monolithic unit between the engine and the turbocharger. The system may also include an improved diesel oxidation catalyst unit having a metal monolithic substrate.

대표청구항 ▼

[ We claim:] [4.] In a diesel power system which includes a diesel engine and an exhaust train through which the exhaust from the diesel engine passes, and wherein the exhaust train comprises a turbocharger, a method of reducing the total particulate matter emissions in said exhaust from the diesel

[ We claim:] [4.] In a diesel power system which includes a diesel engine and an exhaust train through which the exhaust from the diesel engine passes, and wherein the exhaust train comprises a turbocharger, a method of reducing the total particulate matter emissions in said exhaust from the diesel engine comprising providing an oxidation catalyst in said exhaust train between the diesel engine and the turbocharger, wherein the oxidation catalyst reduces the total particulate matter emissions and is in operative contact with the exhaust, wherein said oxidation catalyst comprises praseodymium oxide, cerium oxide or combinations thereof, or a mixed oxide containing praseodymium, cerium or combinations thereof.