| Patent application number | Description | Published |
|---|
| 20080236680 | PASSIVE VALVE FOR ATTENUATION OF LOW FREQUENCY NOISE - A passive valve assembly for an exhaust system is mounted within an exhaust tube. The exhaust tube has a bore that defines an exhaust flow path having a cross-sectional area. One end of the exhaust tube is to be connected to a first exhaust component and a second end of the exhaust tube is to be connected to a second exhaust component such that the exhaust tube forms a sole exhaust path between the first and the second exhaust components. The passive valve assembly includes a vane that is mounted within the bore, and which is moveable between an open position and a closed position. A resilient member biases the vane toward the closed position. When the vane is in the closed position, the vane covers 80% to 97% of the cross-sectional area. | 10-02-2008 |
| 20080237521 | MULTI-PURPOSE EXHAUST VALVE SPRING - An exhaust valve includes a valve body that is fixed for rotation with a shaft supported by at least one bushing. A single spring is used to bias the shaft to hold the valve body in a valve closed position, and to exert an axial load on the shaft to seal the shaft against the bushing to prevent exhaust gas leakage. | 10-02-2008 |
| 20090019664 | SQUARE BUSHING FOR EXHAUST VALVE - An exhaust valve assembly is supported by at least one square bushing. The exhaust valve assembly includes a valve body that is pivoted by a shaft. The square bushing supports the shaft for rotation relative to a bushing housing. The bushing housing comprises a square tube with a square bore. The square bushing includes a square-shaped body with a circular bore that receives the shaft. | 01-22-2009 |
| 20090084998 | Noise attenuation valve assembly - A control mechanism for a noise attenuation valve in a vehicle exhaust system is configured to significantly reduce operational noises. The noise attenuation valve includes a flapper valve ( | 04-02-2009 |
| 20090126356 | OFFSET PASSIVE VALVE FOR VEHICLE EXHAUST SYSTEM - An exhaust component includes a wall with an inner surface defining an exhaust gas flow path. A passive valve assembly includes a vane that is positioned within the exhaust gas flow path to be pivotable between open and closed positions. The vane is defined by a plane that extends across a width of the vane. The vane is supported by a shaft that defines an axis of rotation. The axis of rotation is offset from the plane of the vane such that the vane can be pivoted to a fully open position without interfering with the inner surface of the wall. | 05-21-2009 |
| 20090126357 | PASSIVE VALVE ASSEMBLY FOR VEHICLE EXHAUST SYSTEM - A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane is movable between a fully closed position where a maximum portion of the exhaust gas flow path is blocked by the vane and a fully open position where a minimum portion of the exhaust gas flow path is blocked by the vane. The closed position comprises a start position for the passive valve assembly when there is no exhaust gas flow. The vane is obliquely orientated to a plane that is perpendicular to a centerline of the exhaust component when the vane is in the start position. | 05-21-2009 |
| 20090126358 | PASSIVE VALVE ASSEMBLY WITH ELONGATED VANE - A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane has an elongated body structure that has a greater height than width. The vane is positioned to provide a high percentage of coverage when closed but is able to pivot to a fully horizontal position when open to allow maximum flow. | 05-21-2009 |
| 20090126359 | PASSIVE VALVE WITH STOP PAD - A passive valve assembly for an exhaust component includes a vane that is positioned within an exhaust gas flow path. The vane is pivoted from a closed position to an open position in response to exhaust gas flow overcoming a biasing force. A stop is positioned within the exhaust component and cooperates with the vane to define a closed position for the vane. | 05-21-2009 |
| 20090127022 | PASSIVE VALVE AND RESONATOR ASSEMBLY FOR VEHICLE EXHAUST SYSTEM - An exhaust system includes first and second exhaust components with an inter-pipe that fluidly connects an outlet of the first exhaust component to an inlet of the second exhaust component. A passive valve is mounted within the inter-pipe. The second exhaust component defines an internal cavity that is at least partially packed with a high frequency absorption material and cooperates with the passive valve to effectively attenuate low and high frequency noise. | 05-21-2009 |
| 20090127023 | PASSIVE VALVE ASSEMBLY FOR VEHICLE EXHAUST SYSTEM - An exhaust component includes at least one muffler that has an inlet and an outlet. One pipe body is connected to each of the inlet and the outlet. The pipe bodies each have first and second ends that define a respective overall pipe length. Each pipe body defines a sole exhaust flow path between their first and second ends. A passive valve assembly is mounted outside of the muffler and within one of the pipe bodies. The passive valve assembly is positioned at a location within a first 25% of the overall pipe length of one of the pipe bodies relative to the inlet or outlet of the muffler. | 05-21-2009 |
| 20090319160 | ACTIVE EXHAUST VALVE CONTROL STRATEGY FOR IMPROVED FUEL CONSUMPTION - A control system for an exhaust valve and a method of actively controlling an exhaust valve includes monitoring at least a first engine characteristic, a second engine characteristic, and at least one additional noise determining characteristic. An exhaust valve position is then adjusted based on the first engine characteristic, the second engine characteristic, and the at least one additional noise determining characteristic to improve fuel economy without adversely affecting noise levels. | 12-24-2009 |
| 20100043398 | DUAL EXHAUST SYSTEM WITH INDEPENDENT VALVE CONTROL - A dual exhaust system includes a first exhaust component defining a first exhaust path and a second exhaust component defining a second exhaust path that is different from the first exhaust path. A first valve is associated with the first exhaust path and a second valve is associated with the second exhaust path. The first valve and second valve operate independently of each other to vary exhaust flow and provide sufficient noise control for varying applications. | 02-25-2010 |
| 20100192559 | PASSIVE VALVE ASSEMBLY WITH NEGATIVE START ANGLE - A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane is positioned at an initial start position and is movable between a closed position to provide a minimum exhaust gas flow and an open position to provide a maximum exhaust gas flow. The start position is orientated at a negative angle relative to the closed position. | 08-05-2010 |
| 20100192560 | PASSIVE VALVE ASSEMBLY WITH NEGATIVE START ANGLE - A passive valve assembly for a vehicle exhaust system includes an exhaust component that defines an exhaust gas flow path and a vane that is positioned within the exhaust gas flow path. The vane is positioned at an initial start position and is movable between a closed position to provide a minimum exhaust gas flow and an open position to provide a maximum exhaust gas flow. The start position is orientated at a negative angle relative to the closed position. | 08-05-2010 |
| 20100229993 | REINFORCEMENT FOR EXHAUST SYSTEM CONNECTION INTERFACE - A vehicle exhaust system includes first and second exhaust components that are attached to each other at a connection interface. A reinforcement member is positioned in an overlapping relationship with each of the first and second exhaust components, and is secured in place to strengthen the connection interface. | 09-16-2010 |
| 20100263762 | WIRE TUBE STRUCTURE FOR EXHAUST COMPONENT - A vehicle exhaust component includes an outer shell defining an internal cavity and at least one internal pipe located within the internal cavity. A wire tube surrounds the internal pipe and is spaced apart from the pipe by a radial gap. This radial gap is filled with a fiber material. | 10-21-2010 |
| 20100313554 | ADAPTIVE VALVE FOR EXHAUST SYSTEM - A vehicle exhaust system includes at least one adaptive valve that is associated with an exhaust component, and which is movable between open and closed positions. An anti-flutter component is associated with the adaptive valve to reduce fluttering movement of the adaptive valve caused by exhaust gas pulsations. | 12-16-2010 |
| 20110005860 | EXHAUST COMPONENT WITH REDUCED PACK - A vehicle exhaust component provides comparable fully packed noise reduction capability without requiring a fully packed configuration. A pack is mounted within an internal cavity defined by an exhaust component body. A plurality of pack positions are defined within the internal cavity and at least one pack is positioned at a desired pack position to provide a desired noise reduction. | 01-13-2011 |
