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US 2003/0145584 A1Published application
Exhaust processor with variable tuning system
AssigneeArvin Technologies, Inc.
InventorMehmet S. Ciray
Life of this patent
Estimating the term…
Abstract
An exhaust processor comprises a Helmholtz resonance chamber with a variable tuning throat. The tuning frequency of the exhaust processor changes as the outlet opening from the variable tuning throat into the Helmholtz resonance chamber changes.
Claims20
An exhaust processor comprising
- an acoustic resonator including a housing formed to include a static tuning volume and a tuning tube positioned to extend through an aperture formed in the housing into the static tuning volume, the tuning tube being formed to include an inlet opening adapted to receive engine combustion product therein and a first outlet opening arranged to lie in the static tuning volume and to place the static tuning volume in acoustic communication with acoustic waves associated with engine combustion product in the tuning tube, and
- a resonator controller including a regulator mounted for movement in the static tuning volume formed in the housing alongside the tuning tube to vary the size of the first outlet opening formed in the tuning tube.
An exhaust processor comprising
- a housing defining an interior region and having an inlet and an outlet,
- a flow conduit located in the interior region of the housing to conduct engine combustion product from the inlet to the outlet,
- a static tuning volume located in the interior region of the housing and separate from the flow conduit,
- a tuning tube positioned to lie in the interior region of the housing to extend into the static tuning volume, the tuning tube being formed to include an inlet opening positioned to receive therein engine combustion product extant in the flow conduit and an outlet opening arranged to lie in the static tuning volume and to place the static tuning volume in acoustic communication with acoustic waves associated with engine combustion product in the tuning tube, and
- a resonator controller including a regulator mounted for movement in the static tuning volume alongside the tuning tube to vary the size of the outlet opening formed in the tuning tube.
2 more elements
An exhaust processor comprising
- an engine configured to have at least two modes of operation and produce engine combustion product characterized by an acoustic signature unique to each mode of operation,
- an acoustic resonator including a static tuning volume, a tuning tube formed to include a passageway having an inlet opening arranged to receive engine combustion product produced by the engine, and a first outlet opening formed in the tuning tube to place the static tuning volume in acoustic communication with acoustic waves associated with engine combustion product in the tuning tube, and
- a resonator controller including a regulator mounted for movement alongside the tuning tube to vary the size of the first outlet opening formed in the tuning tube, an engine mode detector coupled to the engine and configured to detect the mode of operation of the engine, and a regulator operator linked to the engine mode detector and the regulator to provide means for moving the regulator alongside the tuning tube to vary the size of the first outlet opening in accordance with a first predetermined criteria based on a selected engine parameter communicated to the regulator operator when the engine is operated in a first mode of operation and with a second predetermined criteria based on the selected engine parameter communicated to the regulator operator when the engine is operated in a second mode of operation.
Dependencies are inferred from the claim text.