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US 9,752,475 B2Granted
Exhaust system for an internal combustion engine
AssigneeAudi AG
InventorsAxel Peters, Siamak Alizadeh, Gerd Verbeck
Life of this patent
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Abstract
An exhaust system for an internal combustion engine includes a muffler, a first exhaust pipe which is connected to the muffler for sound damping, and a second exhaust pipe which extends in terms of flow in parallel relation to the first exhaust pipe and extends through first muffler in the absence of a flow communication with the first muffler. The first and second exhaust pipes originate from a common exhaust pipe. A switching valve adjusts hereby a throughflow cross section of the second exhaust pipe.
Claims11
An exhaust system for an internal combustion engine, comprising:
- a first muffler;
- a first exhaust pipe connected to the first muffler for sound damping;
- a second exhaust pipe extending in terms of flow in parallel relation to the first exhaust pipe and configured to extend through the first muffler in the absence of a flow communication with the first muffler, said first and second exhaust pipes originating from a common exhaust pipe;
- a switching valve configured to adjust a throughflow cross section of the second exhaust pipe;
- and
- at least one second muffler disposed upstream of the first muffler, said first exhaust pipe connected to the second muffler for sound damping, said second exhaust pipe extending through the second muffler in the absence of a flow communication with the second muffler.
3 more elements
Dependencies are inferred from the claim text.