Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate
2004-02-12
2008-09-30
Donovan, Lincoln (Department: 2837)
Acoustics
Sound-modifying means
Muffler, fluid conducting type
C181S237000, C181S241000, C181S277000, C181S253000
Reexamination Certificate
active
07428947
ABSTRACT:
A powertrain control system is provided that includes an engine having multiple cylinders. A controller selectively activates the cylinders to provide a cylinder combination having a desired power displacement. In one example powertrain control system, the controller selectively activates the cylinders between a V-8 and V-4 mode. An exhaust system having a valve and an electrical actuator selectively electrically actuates the valve in response to the controller between multiple positions. The electrical actuator moves the valve from an open position in V-8 mode to a partially closed position in V-4 mode to increase back pressure and reduce NVH issues in V-4 mode. A muffler includes a housing having an exhaust passage. The valve is supported by the housing and arranged in the exhaust passage. The valve is moveable between multiple positions for tuning the muffler. The electrical actuator is supported by the housing to actuate the valve between the multiple positions.
REFERENCES:
patent: 4866933 (1989-09-01), Kao
patent: 4926636 (1990-05-01), Tadokoro et al.
patent: 5290974 (1994-03-01), Douglas et al.
patent: 5388408 (1995-02-01), Lawrence
patent: 5582004 (1996-12-01), Rutschmann
patent: 5655367 (1997-08-01), Peube et al.
patent: 5739483 (1998-04-01), Yashiro et al.
patent: 6178745 (2001-01-01), Meusen
patent: 6662554 (2003-12-01), Sheidler et al.
patent: 1036919 (2000-02-01), None
patent: 61112713 (1986-05-01), None
patent: 09079023 (1997-03-01), None
patent: 2003161149 (2003-06-01), None
patent: 2003161149 (2003-06-01), None
Search Report EP 05 25 0283.
Kolbenschmidt Pierburg Exhaust Flap Design.
Callahan Joseph E.
Nohl John P.
Woemer David R.
Carlson & Gaskey & Olds
Donovan Lincoln
EMCON Technologies LLC
Luks Jeremy
LandOfFree
Electrically controlled in-muffler exhaust valve for use... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrically controlled in-muffler exhaust valve for use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrically controlled in-muffler exhaust valve for use... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3981170