Patent application number | Description | Published |
20080264719 | SILENCER - A silencer for attenuating a sound includes an inner duct in which gas flows, and an outer duct surrounding the inner duct with a gas layer formed between the outer duct and the inner duct. The sound is generated in one of an upstream side of the inner duct in a gas flow direction, a downstream side of the inner duct in the flow direction, and an inside of the inner duct. The inner duct includes a thin film over its entire surface. The film has a first reinforcement section formed in a direction parallel to the flow direction, and a plurality of vibrating surfaces. The film is bent at the first reinforcement section. Each combination of adjacent two of the plurality of vibrating surfaces is connected by the first reinforcement section. The first reinforcement section of the inner duct is fixed to the outer duct. | 10-30-2008 |
20080296811 | METHOD FOR PRODUCING DUCT - According to a method for producing a duct, a cylindrical preform, which opens at its both end portions in a longitudinal direction and has a central part, is formed. The central part is narrowed with respect to the both end portions. The central part has a smaller cross-sectional area than that of the both end portion. The preform is formed from a thermoplastic material, which increases in strength when stretched. Next, the preform is heated. Then, stretch blow molding is performed on the preform by stretching the preform in axial and radial directions thereof, such that the cross-sectional area of the central part becomes generally the same as that of the both end portion, or equal to or larger than that of the both end portion. The central part is narrowed to such an extent that it retains predetermined strength after performing the molding on the preform. | 12-04-2008 |
20090000587 | SOUND QUALITY CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A sound quality control apparatus includes an air intake duct defining a suction passage, through which air is supplied to an engine, and having a double tube part, and an air cleaner that filters the air flowing through the suction passage. The double tube part includes an outer pipe and an inner pipe disposed in the outer pipe. The inner pipe defines a communicating passage communicating with the suction passage. The outer pipe and the inner pipe define a resonant chamber therebetween. The outer pipe has a branch opening part that opens in a vehicle interior of an automobile, or a branch opening part that opens toward a vicinity of the vehicle interior of the automobile. The inner pipe has a thin film partition wall that divides the resonant chamber airtightly from the communicating passage. | 01-01-2009 |
20090000588 | TORQUE INCREASE RESONATOR - A torque increase resonator for facilitating delivery of intake air to a combustion chamber of an engine by resonating with intake air pulsation generated by the delivery of intake air to the combustion chamber includes a chamber wall. The chamber wall projects in a surge tank of an intake manifold to define a resonance chamber. The resonance chamber is prevented from communicating with intake air. The chamber wall includes a resonating member, which is a thin film and resonates with the intake air pulsation. The chamber wall is integrally formed. | 01-01-2009 |
20110011084 | EXHAUST GAS RECIRCULATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An EGR system includes an exhaust gas recirculation pipe recirculating exhaust gas flowing through an exhaust pipe into an intake pipe upstream of a compressor of a supercharger. A swirling flow generator generates a swirling flow of intake air and exhaust gas along an inner surface of the intake pipe in order to centrifugally separate foreign matters from the intake air and the exhaust gas. A foreign-matters-collecting chamber collects the centrifugally separated solid foreign matters therein. The separated solid foreign matters are discharged through a discharge opening and a discharge pipe. | 01-20-2011 |
20110030372 | EGR APPARATUS FOR INTERNAL COMBUSTION ENGINE - A mixing device of an EGR apparatus has a double pipe structure being composed of a first cylindrical member and a second cylindrical member, wherein the first and second cylindrical members are coaxially arranged with each other. Cyclone blades are provided between the first and second cylindrical members, so that EGR gas introduced from an inlet portion into an inside of the first cylindrical member flows along an cylindrical inner wall of the first cylindrical member. A swirl flow is generated in the EGR gas passing through the cyclone blades, so that the EGR gas spirally flows in a downstream side to remove foreign material, such as flocculated water from the EGR gas. | 02-10-2011 |
20130008739 | SOUND ABSORBING STRUCTURE - A sound absorbing structure includes multiple sound absorbers. The sound absorbers are assembled together into a sound absorbing member. The sound absorbing member absorbs sound emitted from a sound source. Each of the sound absorbers is shaped like a hollow tube. Each of the sound absorbers has a hole extending in its axis direction. | 01-10-2013 |
20150096520 | VEHICULAR AIR INTAKE APPARATUS - A Helmholtz resonator communicates with an interior of an intake passage, which is configured to draw intake air to a combustion chamber of an engine. The Helmholtz resonator has a volume chamber and a communication pipe. The volume chamber forms a resonance chamber. The communication pipe communicates the volume chamber with the intake passage. The communication pipe includes an acoustic stack, which is configured to cause a temperature gradient by utilizing an acoustic energy. | 04-09-2015 |