Michael J Norris

US Patent:

6422008, Jul 23, 2002

Filed:

Apr 16, 2001

Appl. No.:

09/835797

Inventors:

Kenneth E. Voss - Somerville NJ
Timothy D. Wildman - Monmouth Junction NJ
Michael G. Norris - Westfield NJ
Gary W. Rice - Scotch Plains NJ

Assignee:

Engelhard Corporation - Iselin NJ

International Classification:

F01N 320

US Classification:

60299, 428552, 123272, 123670, 427456, 427250

Abstract:

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. The oxidation catalyst can also be incorporated into a thermal insulative coating inside the cylinders, particularly on non-rubbing surfaces such as The invention also includes the use of a protective mullite top coat on the thermal coating. A further embodiment is the use of a stainless steel bond coat to bind the thermal coating to a metallic substrate, particularly an aluminum substrate.

US Patent:

59878827, Nov 23, 1999

Filed:

Apr 19, 1996

Appl. No.:

8/635345

Inventors:

Kenneth E. Voss - Somerville NJ
Timothy D. Wildman - Monmouth Junction NJ
Michael G. Norris - Westfield NJ
Gary W. Rice - Scotch Plains NJ

Assignee:

Engelhard Corporation - Iselin NY

International Classification:

F01N 320
F01N 328
F02B 5102

US Classification:

60274

Abstract:

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.