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| Number | Title | Issue Date |
| 7967107 | Muffler apparatus for vehicle A muffler apparatus for a vehicle, may include a muffler housing; baffle plates that are disposed in the muffler housing and divides an internal space of the muffler housing; an intake pipe that is supported by at least one of the baffle plates and takes in exhaust ... | 06/28/2011 |
| 7938227 | Variable resonation chamber valve A variable resonation chamber valve includes an outer valve seat and a rotatable plunger. The outer valve seat defines an inlet opening into an associated resonation chamber. The rotatable plunger is movable into the inlet opening of the valve seat for varying a tun... | 05/10/2011 |
| 7913810 | High-performance muffler assembly with multiple modes of operation A high-performance muffler assembly for exhaust system of an internal combustion engine. The muffler assembly comprises an elongated casing having an inlet port and an exit port, a first pipe disposed within the casing and having an inlet end in fluid communication ... | 03/29/2011 |
| 7905320 | Exhaust system for saddle-ride type vehicle An exhaust valve and a catalyst can be easily disposed of in a simple manner. The interior of a triangular muffler is partitioned into three expansion chambers. A manifold pipe is connected to the second, middle expansion chamber sideways from a lower portion thereo... | 03/15/2011 |
| 7896130 | Snap action valve with inertia damper Snap action valve assemblies for use in conduits of automotive exhaust systems have their operation controlled by use of inertia damper elements coupled to an axle of a rotatable valve plate of the valve assembly. ... | 03/01/2011 |
| 7775322 | Snap-action valve for exhaust system A passive, exhaust pressure actuated valve assembly for placement inside a tubular exhaust conduit is pivotally mounted to an off-center axle for rotation between fully closed and fully opened positions. A bias element forces the valve flap toward the fully closed p... | 08/17/2010 |
| 7753168 | Muffler A muffler has a casing with a plurality of sound-muffling chambers, exhaust pipes that pass through at least two sound-muffling chambers and to pass through exhaust from an engine, a plurality of apertures provided in each exhaust pipe, and a plurality of valves pro... | 07/13/2010 |
| 7703574 | Exhaust system An exhaust system (1) is provided for an internal combustion engine (4), especially in a motor vehicle, with two separate exhaust gas lines (2, 3) with a first sound transmission feature (7), which couples the two exhaust gas lines (2,... | 04/27/2010 |
| 7673720 | High-performance muffler assembly with multiple modes of operation A high-performance muffler assembly for exhaust system of an internal combustion engine. The muffler assembly comprises an elongated casing having an inlet port and an exit port, a first pipe disposed within the casing and having an inlet end in fluid communication ... | 03/09/2010 |
| 7628250 | 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... | 12/08/2009 |
| 7527126 | Exhaust apparatus of an internal combustion engine A single valve member is provided for selecting communication of one of two flow passages constituting an exhaust flow passage, and continuously providing a flow passage area of the selected one of the two flow passages. According to this valve member, a changeover ... | 05/05/2009 |
| 7484591 | Muffler outlet part for a motorcycle muffler A muffler outlet part for a muffler to be used in exhaust systems of motorcycles has at least one main body disposed transversely to an outflow direction of exhaust gas and having a center axis, the main body having a centrical first outlet opening disposed concentr... | 02/03/2009 |
| 7438157 | Muffler for an exhaust gas system A muffler for an exhaust gas system of an internal-combustion engine has an exhaust gas inlet and a first flow pipe arranged inside the muffler and completely penetrating the muffler. A shut-off device is arranged in the first flow pipe, for the shutting-off and ope... | 10/21/2008 |
| 7428947 | Electrically controlled in-muffler exhaust valve for use during cylinder deactivation A powertrain control system is provided that includes an engine having multiple cylinders. A controller selectively activates the cylinders to provide a cylinder combination having a desired power displacement. In one example powertrain control system, the controlle... | 09/30/2008 |
| 7426979 | Exhaust gas control valve An exhaust gas control valve includes a valve seat, a valve plate having a first exhaust gas pressure receiving area corresponding to an opening area and a second exhaust gas pressure receiving area larger than the first area; and a spring for closing the valve. In ... | 09/23/2008 |
| 7416051 | Assembly and method for fan noise reduction from turbofan engines using dynamically adaptive Herschel-Quincke tubes An assembly useful in reducing aircraft engine noise such as turbofan engine noise (730) comprises: (1) at least one tube “H-Q” having an inlet end (738), an outlet end (740) and a central tube portion therebetween; an (ii) at least one actu... | 08/26/2008 |
| 7380638 | Exhaust noise control for motorcycles A noise control apparatus for a motorcycle exhaust system. The apparatus includes at least one exhaust pipe assembly having a direct pass-through mode and an indirect mode wherein exhaust gases are optionally directed through noise attenuating means. The apparatus i... | 06/03/2008 |
| 7364010 | Exhaust system for a motorcycle, and motorcycle including same A motorcycle, having both left and right mufflers, has an exhaust structure which enables an increase in the allowable margin through which the rear wheel is permitted to rise. A main exhaust pipe extends from an engine to one side of a shock absorber disposed on th... | 04/29/2008 |
| 7347045 | Motorcycle dynamic exhaust system The present invention provides a method of operating a dynamic exhaust system of a motorcycle engine. The method includes providing a valve in the exhaust system that is movable to direct exhaust gases between a first flow path through the exhaust system and a secon... | 03/25/2008 |
| 7347046 | Layout of catalyst of vehicle An exhaust system for a vehicle includes a muffler including end walls and a side wall connected to the end walls enclosing an interior space of the muffler. A first pipe is disposed within the interior space of the muffler and extends from one end of the muffler at... | 03/25/2008 |
| 7337609 | Diesel exhaust system variable backpressure muffler The invention concerns diesel particulate filter regeneration in an exhaust system of a vehicle having a diesel engine. The particulate filter regeneration is selectively accomplished by actuating a particulate filter backpressure valve located downstream of the die... | 03/04/2008 |
| 7328574 | Exhaust line and motor vehicle equipped therewith The invention concerns an internal combustion engine exhaust line comprising an active noise reduction system with variable choke device, continuously regulated based on the instantaneous discharge rate pulses of exhaust gases exiting from the internal combustion en... | 02/12/2008 |
| 7325651 | Motorcycle exhaust system To provide a motorcycle exhaust system, which is less susceptible to the elevated temperature of the exhaust gases and vibrations induced by the motorcycle combustion engine (E) and in which the sectional area of the exhaust passage can be properly adjusted independ... | 02/05/2008 |
| 7310942 | Exhaust passage control valve Exhaust passage control valve 10 may comprise housing 30, valve member 20, and helical torsion spring 40. Housing 30 has an exhaust passage. Exhaust gas from an internal combustion engine flows through the exhaust passage of the ho... | 12/25/2007 |
| 7287622 | Exhaust muffler The present specification discloses a muffler for attenuating exhaust noise from an internal combustion engine. The muffler includes a main chamber, an intermediate pipe, a diffuser chamber, a spark arrester, and an exhaust pipe. Exhaust gases from the engine enter ... | 10/30/2007 |
| 7273130 | Device and method for active soundproofing, and power unit for aeroplanes A device for active noise reduction has a chamber, which is arranged laterally in relation to a gas flow, and a chamber opening constructed in one wall of the chamber. In the area of the chamber opening, a deflection device is adjustably arranged. The deflection dev... | 09/25/2007 |
| 7240768 | Flapper finger valve A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherei... | 07/10/2007 |
| 7182171 | Muffler with variable acoustic properties A muffler with variable acoustic properties. A pressure cell with a diaphragm, a spring, a piston, a piston rod, a closing element on the piston rod, and a pressure connection line are integrated into a housing. The diaphragm is thermally insulated against the pisto... | 02/27/2007 |
| 7104359 | Muffler having a baffle with angled plates A muffler having a baffle with angled plates includes a one piece baffle, a container and two end caps. The one piece baffle has at least three different configurations. The baffle preferably has two, three or four plates, namely “V”, “Z” or “W” shapes. ... | 09/12/2006 |
| 7090048 | Method and apparatus for exhaust sound attenuation on engines with cylinder deactivation A system for attenuating exhaust noise from an engine with a first group of active cylinders and a second group of deactivatable cylinders includes a first exhaust manifold connected to the first group of active cylinders and a second exhaust manifold connected to t... | 08/15/2006 |
| 7073626 | Engine exhaust muffler with guide vanes imparting a successively alternating spiral swirl gas flow A muffler has a housing (2) through which exhaust gas flows and which has at least one housing chamber (3, 5) and in which deflecting elements (13 to 16) serving to make the gas swirl are arranged spaced one behind another along a main ax... | 07/11/2006 |
| 7066296 | Valve device for silencer A valve device for a silence opens a bypass passage provided in the silencer to flow exhaust gas through the bypass passage when exhaust gas pressure rises to a certain pressure. The valve device includes a base having a valve opening through which exhaust gas flows... | 06/27/2006 |
| 7063182 | Muffler baffle plate spacer formed from stock material A muffler has a pair of spaced baffle plates that each receive a flow tube. The flow tubes have spaced ends such that an intermediate chamber is defined to receive air flow to be dampened. In existing mufflers, a bracket needed to be formed to the desired length to ... | 06/20/2006 |
| 7051523 | Exhaust system assemblies employing wire bushings for thermal compensation Exhaust system assemblies employ wire bushings for thermal compensation to minimize noise due to “stick-slip” while the system cools. In a preferred embodiment, the wire bushings are formed of at least one strand of wire coiled about male end portions of pipe se... | 05/30/2006 |
| 7040451 | Automotive exhaust silencer system with variable damping characteristics In a muffler device of a motor vehicle, with a plurality of mufflers and an actuator for changing the flow resistance to the exhaust gases flowing through the mufflers, in order to change the damping characteristic, the actuator is provided in a pipe branch having a... | 05/09/2006 |
| 7021420 | System and method for phased noise attenuation A method and system for attenuating noise including arranging a plurality of accumulators (210, 310) to form a transmittance path for compressible flow mass and noise between a noise source (212, 312) and the external environment (218, 318), and... | 04/04/2006 |
| 6938729 | Exhaust gas system An exhaust gas system for an internal combustion engine, in particular, of a motor vehicle has two mufflers through which the exhaust gas is able to flow in a parallel fashion. A switching unit makes it possible to selectively convey the exhaust gas flow of the inte... | 09/06/2005 |
| 6899199 | Flapper finger valve assembly A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherei... | 05/31/2005 |
| 6755279 | Controllable muffler system for internal combustion engine A controllable muffler system is sued for use with an engine that produces a power by burning fuel. The system comprises a first passage section extending from the engine for having an exhaust gas of the engine flow therethrough. The first passage section has a cata... | 06/29/2004 |
| 6732510 | Exhaust processor with variable tuning system 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. ... | 05/11/2004 |
