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7617675 Catalyst chamber  
In order to make available an exhaust gas system for a combustion engine with an external housing, which contains at least one rear shell and one front shell, and with a catalyst chamber, in which...
7614221 Exhaust purification device and an exhaust purification method of an internal combustion engine  
An exhaust system for an internal combustion engine includes a catalytic device within an exhaust path of the engine, wherein the catalytic device includes a housing with a catalyst carrier. A...
7596944 Mixing element for an exhaust gas system  
The present invention relates to a mixing element and an exhaust system of an internal combustion engine. The mixing element has two inlet openings and two outlet openings, wherein each inlet...
7509800 Exhaust system of multi-cylinder internal combustion engine  
An exhaust system of an internal combustion engine having at least one cylinder comprises a main exhaust passage connected to the cylinder; a main catalytic converter disposed in the main exhaust...
7503171 Exhaust system for an internal combustion engine  
An exhaust system for an internal combustion engine having a plurality of cylinders is disclosed. The exhaust system comprises a plurality of exhaust branch passages, an intermediate exhaust pipe...
7490467 Gas flow enhancer for combustion engines  
A gas flow enhancer for a combustion engine includes a housing, configured to receive an inlet flow of gas at an inlet pressure, and enclosing an expansion chamber. Disposed within the expansion...
7484361 Exhaust gas purifying apparatus of motorcycle  
An exhaust gas purifying apparatus is provided for a motorcycle, configured to minimize engine output characteristics, and to raise the temperature of a catalyst to an activation temperature...
7458208 Exhaust gas extractor system  
Unobstructed, pressurized air from the forward movement of a vehicle such as a pickup, SUV or automobile is forced into an air scoop (mounted to the undercarriage of the vehicle). This air is then...
7448204 Exhaust system for an engine  
A four-cycle engine is provided that includes an exhaust port for releasing combusted gas from the engine and an exhaust system. The exhaust system includes an exhaust pipe coupled with the exhaust...
7444806 Exhaust system component  
An exhaust-carrying component ( 2 ) of an exhaust system ( 1 ) for an internal combustion engine is provided, in particular for a motor vehicle. The component ( 2 ) includes a pipe ( 4 ) through...
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...
7437236 Method for customizing the properties of a drive assembly in motor vehicles  
The object of the invention is to customize the properties of the drive assembly of motor vehicles comprising an intake system, an exhaust system, and/or an internal combustion engine. For this...
7350351 Exhaust system of engine of motorcycle  
An exhaust system of an engine of a motorcycle, including an exhaust pipe configured to extend in one of an upward direction and a downward direction from an exhaust port formed at a front portion...
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...
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...
7347044 Exhaust water trap  
A vertical exhaust water trap assembly has an outer housing and an internal housing or exhaust tube defining an annular water collection spaced therebetween bypassing a central exhaust flow area.
7334402 Exhaust system with catalytic converter and motorcycle using the same  
A catalytic converter-incorporated exhaust system is provided, which includes an exhaust tube through which exhaust gases emitted from an engine flow, and a muffler fluidly connected with a...
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...
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...
7234297 Motorcycle exhaust enhancers  
Sound and power are an important part of the motorcycling experience. From the early days people have been attempting to get it “right” and have tried numerous ways to achieve the best of both...
7174991 Muffler for internal combustion engine  
The subject invention refers to a muffler comprising a muffler housing ( 1, 2 ) and generally a catalytic converter element ( 13 ) mounted in the housing, which muffler has at least one inner...
7171804 Exhaust system for multi-cylinder engine, and straddle-type vehicle provided with same  
An exhaust system for a multi-cylinder engine can include a plurality of exhaust pipes with first upstream ends connected to exhaust openings of a multi-cylinder engine, and a collecting pipe...
7152398 Dual motorcycle exhaust system  
An exhaust system for an internal combustion engine having a first cylinder and a second cylinder from which pulses of exhaust gas exit and are routed along separate paths towards the exhaust...
7146806 Internal combustion engine cylinder and muffler assembly with catalytic converter  
A two cycle internal combustion engine cylinder having a piston chamber. The cylinder includes transfer ports; and an exhaust port divided into at least two sections. A first one of the sections...
7114330 Vertical exhaust water trap assembly  
An exhaust water trap assembly has separated and spaced exhaust tubes, and a dome cap blocking entry of water to protect an upstream catalytic converter or soot filter. A first tube extends axially...
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...
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...
7021052 Motorcycle exhaust control system  
A motorcycle exhaust control system for covering exhaust cross-over pipes is comprised of an elongate tubular crossover block-off member having a side wall. The crossover block-off member side wall...
7017339 Exhaust system catalyst assembly for a dual crankshaft engine  
An exhaust system for a dual crankshaft engine system having a first engine and a second engine having a common exhaust member open at an end thereof for venting engine exhaust. A first exhaust...
6964161 Induction exhaust system  
A induction exhaust system, for an internal combustion engine, capable of the multi step processes of 1) scavenging the chamber of exhaust gases and free radicals, 2) breaking the scavenge vacuum...
6955043 Muffler assembly  
A muffler assembly for an internal combustion engine of a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine or the like includes an exhaust-gas muffler ( 1 ) which...
6941751 Exhaust muffler and muffler system for use with an internal combustion engine  
An exhaust muffler system for use on a motorcycle or four-wheeled vehicle provides for operation in either of two modes, a regular configuration that provides a high degree of noise reduction, or a...
6915876 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...
6901753 Engine expansion pipe  
An expansion pipe for an engine which has a curved tubular body, a first connector for connecting an interior of the body to an exhaust part of the engine, and a second connector which is used for...
6901752 Exhaust processor with variable tuning system and method of operating such exhaust processor  
An exhaust processor has an exhaust tube and a cover mounted for rotation at least partially around the exhaust tube to adjust the tuning frequency of the exhaust processor. A method of operating...
6889500 Engine exhaust extractor  
A device for engine exhaust extraction improves engine performance and efficiency. The device includes outer and inner tubes sharing a central axis. The inner tube is held in place by supports...
6874317 Double pipe exhaust manifold  
A double pipe exhaust manifold includes an inner pipe, an outer pipe formed in a cylindrical shape by joining at least one side edge thereof by welding, a space retaining member disposed in an...
6868670 Compact, reduced backpressure, vertical exhaust water trap assembly  
An exhaust water trap assembly has separated and spaced exhaust tubes, and a dome cap blocking entry of water to protect an upstream catalytic converter or soot filter. A first tube extends axially...
6848252 Exhaust enhancement for aftermarket motorcycle exhaust pipes with a straight pipe type design and with inside pipe diameter from 1.875″ and larger  
Sound and power are an important part of the motorcycling experience. From the early days people have been attempting to get it “right” and have tried numerous ways to achieve the best of both...
6840038 Exhaust system for outboard motor  
An exhaust system for an internal combustion engine of an outboard motor is provided. The exhaust system provides dual exhaust passages, simplifying the engine's construction and reducing...
6840037 Exhaust pulse control unit  
An exhaust pulse control unit ( 10 ) for increasing exhaust manifold vacuum in an engine comprises an inlet ( 11 ), an outlet ( 12 ) and an intermediate containment zone ( 13 ). An exhaust pulse...
6804955 Dual motorcycle exhaust system  
An exhaust system for an internal combustion engine having a first cylinder and a second cylinder from which pulses of exhaust gas exit and are routed along separate paths towards the exhaust...
6804954 Motorcycle exhaust system  
An exhaust system for use with a four-stroke engine having first and second cylinders. The cylinders generate exhaust pulses at uneven time intervals with respect to each other. The exhaust system...
6772588 Intake and exhaust control systems for engine  
The intake and exhaust control systems are operable in varying modes, according to the engine speed, by a single actuator. The intake control system includes an intake valve that allows a variable...
6732509 Engine acoustical system  
A number of embodiments of acoustical devices for improving either or both the intake and exhaust sounds emanated from an internal combustion engine. This is achieved by employing acoustical...
6732508 Exhaust system for an internal combustion engine and engine comprising the same  
An exhaust system for a two-cycle internal combustion engine combusting a normally gaseous hydrocarbon as fuel, the engine having a cylinder having an exhaust port in communication with an exhaust...
6698194 Two-stroke internal combustion engine  
A two-stroke internal combustion engine ( 1 ) is provided with a muffler device ( 2 ). In one example, the engine ( 1 ) is intended for a working tool, such as a chain saw or a trimmer. A pipe ( 3...
6684633 Exhaust device for two-stroke internal combustion engine  
The present invention discloses a compact efficient exhaust handling device that is particularly advantageous for use with small two-stroke, piston-type internal combustion engines, which device...
6672919 Temperature control system for marine exhaust  
Temperature control system for marine engine exhaust system. The control system lowers flow of cooling water to water jacket and exhaust gas conduit of the exhaust system at low engine speeds. The...
6637545 Silencer  
A device for silencing a flowing gas which includes a valve housing in which a valve is mounted. A separate pressure regulator is provided which is in communication with the flowing gas and which...
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