Patent ID: 8820475

Claim:
An exhaust muffler for an internal combustion engine comprising: a housing having a sidewall, a first end plate and a second end plate spaced apart and located opposite the first end plate, the housing defining a housing axis; a plurality of partitions disposed within the housing defining a plurality of chambers, including a first resonator chamber, a second resonator chamber, a cross-flow chamber, and an outlet chamber; an inlet pipe disposed through the housing into the first resonator chamber, the inlet pipe including a bend located within the first resonator chamber and defining a first inlet axis and a second inlet axis, and an aperture located in the bend and being substantially coaxial with the first inlet axis, wherein the inlet pipe is in fluid communication with the first resonator chamber, and a first diffuser located in the cross-flow chamber, the first diffuser including a plurality of first diffuser openings disposed in a first annular wall; a resonator tube in fluid communication with the second resonator chamber, the cross-flow chamber, and the outlet chamber, the resonator tube including a second diffuser located in the cross-flow chamber, the second diffuser including a plurality of second diffuser openings disposed in a second annular wall, a resonator port disposed within the second resonator chamber, and a packed tube portion disposed within the outlet chamber; and an outlet pipe disposed through the housing and in fluid communication with the outlet chamber.