Method and apparatus for exhaust sound attenuation on...

Details Method and apparatus for exhaust sound attenuation on... Method and apparatus for exhaust sound attenuation on...

2006-08-15

2006-08-15

San Martin, Edgardo (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S237000, C181S254000, C181S250000, C060S312000, C060S323000, C060S324000

Reexamination Certificate

active

07090048

ABSTRACT:
A system for attenuating exhaust noise from an engine with a first group of active cylinders and a second group of deactivatable cylinders includes a first exhaust manifold connected to the first group of active cylinders and a second exhaust manifold connected to the second group of deactivatable cylinders. The second exhaust manifold is connected to the first exhaust manifold such that the second exhaust manifold acts as a resonator to attenuate sound from the first group of active cylinders when the second group of cylinders is deactivated.

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