Exhaust valve and active noise control for compact exhaust system
AssigneeFaurecia Emissions Control Technologies, USA, LLC
InventorsJames Egan, Hannes Steinkilberg, Yuntian Wang, Brandon Sobecki, Subhabrata Banerjee
Life of this patent
Estimating the term…
Abstract
A vehicle exhaust system includes a first exhaust gas path and a second exhaust gas path. At least one valve is positioned within the first exhaust gas path and an active noise control system is associated with the second exhaust gas path. An example method includes, providing the first exhaust gas path with a first tailpipe having a first outlet and the second exhaust gas path with a second tailpipe having a second outlet separate from the first outlet. The valve and the active noise control system are controlled simultaneously to control noise generated by the vehicle exhaust system.
Claims20
A vehicle exhaust system comprising:
- at least one first muffler;
- at least one second muffler downstream of the at least one first muffler;
- a first exhaust gas path extending to a first outlet at a first tailpipe and comprising a first pipe having one end connected to the at least one first muffler and an opposite end connected to the at least one second muffler in a non-bypass configuration;
- a second exhaust gas path extending to a second outlet at a second tailpipe and comprising a second pipe having one end connected to the at least one first muffler and an opposite end connected to the at least one second muffler in a non-bypass configuration;
- at least one valve positioned within the first exhaust gas path;
- and
- an active noise control system associated with the second exhaust gas path.
A vehicle exhaust system comprising:
- a first exhaust gas path having a first muffler and a first tailpipe;
- a second exhaust gas path having a second muffler and a second tailpipe;
- at least one valve positioned within the first exhaust gas path, wherein the at least one valve is positioned in the first tailpipe downstream of the first muffler;
- and
- an active noise control system associated with the second exhaust gas path, wherein the active noise control system is associated with the second tailpipe downstream of the second muffler, and wherein the second muffler is smaller than the first muffler.
A vehicle exhaust system comprising:
- a first exhaust gas path;
- a second exhaust gas path wherein the first exhaust path includes a first tailpipe and the second exhaust gas path includes a second tailpipe;
- at least one valve positioned within the first exhaust gas path;
- an active noise control system associated with the second exhaust gas path;
- and
- a muffler that is connected to the first and second tailpipes, and wherein the valve and the active noise control system are positioned downstream of the muffler.
A vehicle exhaust system comprising:
- a first tailpipe providing a first exhaust gas outlet;
- a second tailpipe providing a second exhaust gas outlet separate from the first exhaust gas outlet;
- at least one valve positioned within the first tailpipe;
- an active noise control system associated with the second tailpipe, wherein the active noise control system includes at least one speaker and microphone;
- and
- at least one controller to control the at least one valve and the active noise control system.
A method of controlling noise generated by a vehicle exhaust system comprising the steps of:
- providing at least one first muffler and at least one second muffler positioned downstream of the first muffler;
- connecting one end of a first pipe to the at least one first muffler and an opposite end to the at least one second muffler in a non-bypass configuration to form a first exhaust gas path;
- connecting one end of a second pipe to the at least one first muffler and an opposite end to the at least one second muffler in a non-bypass configuration to form a second exhaust gas path;
- providing a first tailpipe having a first outlet and a second tailpipe having a second outlet separate from the first outlet;
- associating at least one valve with the first tailpipe;
- associating an active noise control system with the second tailpipe;
- and
- controlling the valve and the active noise control system simultaneously to control noise generated by the vehicle exhaust system.
Dependencies are inferred from the claim text.