Michael J Christopherson

US Patent:

20060000205, Jan 5, 2006

Filed:

Jun 30, 2004

Appl. No.:

10/881189

Inventors:

Alexander Bozmoski - Brookfield WI, US
Timothy Osterberg - Hubertus WI, US
Michael Christopherson - Waukesha WI, US
Anthony Coffey - Cedarburg WI, US
William Pari - Waukesha WI, US
Michael Richter - East Troy WI, US
Stacy Smith - Oconomowoc WI, US
Richard Pierson - New Berlin WI, US
Michael Selwa - Oconomowoc WI, US

Assignee:

Harley-Davidson Motor Company Group, Inc. - Milwaukee WI

International Classification:

F02M 25/06
F01N 7/00
F01N 3/00

US Classification:

060324000, 060288000

Abstract:

The present invention provides a method of operating a dynamic exhaust system of a motorcycle engine. The method includes providing a valve in the exhaust system that is movable to direct exhaust gases between a first flow path through the exhaust system and a second flow path through the exhaust system. The method includes actuating the valve at a first speed to redirect exhaust gases from the first flow path to the second flow path and actuating the valve at a second speed greater than the first speed to redirect exhaust gases from the second flow path to the first flow path.

US Patent:

20070256673, Nov 8, 2007

Filed:

Jun 20, 2007

Appl. No.:

11/765520

Inventors:

Alexander Bozmoski - Brookfield WI, US
Timothy Osterberg - Hubertus WI, US
Michael Christopherson - Waukesha WI, US
Anthony Coffey - Cedarburg WI, US
William Pari - Waukesha WI, US
Michael Richter - East Troy WI, US
Stacy Smith - Oconomowoc WI, US
Richard Pierson - New Berlin WI, US
Michael Selwa - Oconomowoc WI, US

Assignee:

Harley-Davidson Motor Company Group, Inc. - Milwaukee WI

International Classification:

F01N 7/08

US Classification:

123568110

Abstract:

The present invention provides a method of operating a dynamic exhaust system of a motorcycle engine. The method includes providing a valve in the exhaust system that is movable to direct exhaust gases between a first flow path through the exhaust system and a second flow path through the exhaust system. The method includes actuating the valve at a first speed to redirect exhaust gases from the first flow path to the second flow path and actuating the valve at a second speed greater than the first speed to redirect exhaust gases from the second flow path to the first flow path.