Passive flap valve for vehicle exhaust system
AssigneeFaurecia Emissions Control Technologies, USA, LLC
InventorMatthias Berger
Life of this patent
Estimating the term…
Abstract
A valve assembly for a vehicle exhaust system includes at least one pipe enclosing an exhaust gas flow path, the pipe defining a central axis, and at least one flexible flap positioned within the exhaust gas flowpath. The at least one flexible flap has one fixed edge held fixed to the pipe and extends to a distal edge that is free to bend in response to an increase in exhaust gas flow pressure to provide a variable restriction to flow through the pipe that varies in response to a pressure difference upstream and downstream of the at least one flexible flap.
Claims22
A valve assembly for a vehicle exhaust system comprising:
- at least one pipe enclosing an exhaust gas flow path, the pipe defining a central axis, and wherein the at least one pipe comprises an inlet pipe that is positioned upstream of a muffler or an outlet pipe that is positioned downstream of a muffler;
- and
- at least one flexible flap positioned within the exhaust gas flowpath, wherein the at least one flexible flap has a fixed edge held fixed to the pipe and extends to a distal edge that is free to bend in response to an increase in exhaust gas flow pressure to provide a variable restriction to flow through the pipe that varies in response to a pressure difference upstream and downstream of the at least one flexible flap.
A valve assembly for a vehicle exhaust system comprising:
- at least one pipe enclosing an exhaust gas flow path, the at least one pipe defining a central axis and having an upstream end and a downstream end, wherein the at least one pipe comprises an inlet pipe that is positioned upstream of a muffler or an outlet pipe that is positioned downstream of a muffler;
- and
- at least one flexible flap positioned within the exhaust gas flowpath of the pipe at a location spaced from the upstream and downstream ends, wherein the at least one flexible flap has a fixed edge held fixed to the pipe and extends to a distal edge that is free to bend in response to an increase in exhaust gas flow pressure to provide a variable restriction to vary exhaust gas flow through the at least one pipe that varies in response to a pressure difference upstream and downstream of the at least one flexible flap.
Dependencies are inferred from the claim text.