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 |
20100229841 | NITROGEN-ENRICHED GAS SUPPLYING DEVICE FOR INTERNAL COMBUSTION ENGINE - A nitrogen-enriched gas supplying device includes a bypass passage and a gas separating membrane, so as to supply nitrogen-enriched gas to an internal combustion engine. The bypass passage introduces a part of exhaust gas from an exhaust passage of the internal combustion engine into an intake passage of the internal combustion engine. The gas separating membrane is arranged in the bypass passage. The gas separating membrane is configured to separate carbon dioxide from exhaust gas introduced into the bypass passage. | 09-16-2010 |
20100231368 | VEHICLE PRESENCE NOTIFICATION APPARATUS - A vehicle presence notification apparatus includes a modulating section to modulate an ultrasonic wave functioning as a carrier wave according to an audible sound; and a speaker to generate the audible sound as a notice sound by emitting the modulated ultrasonic wave in the air. As proceeding in the air, the modulated ultrasonic wave is gradually demodulated to thus become the audible sound. The audible sound posterior to the demodulation has a significant directivity like the ultrasonic wave. The notice sound is thus conveyed mainly to a pedestrian who is present in a dangerous area range where a danger needs to be taught. The sense of discomfort due to the notice sound is reduced for a pedestrian, who is not present in the dangerous area region or a person who is inside of another vehicle. | 09-16-2010 |
20110026729 | VEHICLE EXISTENCE INFORMING DEVICE AND METHOD FOR INFORMING EXISTENCE OF A VEHICLE - A vehicle existence informing device is configured to inform existence of a vehicle by using a warning sound at a frequency in an audible range. A speaker array includes at least two speakers arranged so that oscillation directions of oscillators of the at least two speakers substantially coincide with each other. The speaker array is configured to radiate a warning sound on a carrier wave, which is at a frequency in an ultrasonic range, to an air. A phase control unit is configured to advance and delay a phase of a sound wave radiated from one of the at least two speakers with respect to a phase of a sound wave radiated from an other of the at least two speakers. | 02-03-2011 |
20110032122 | VEHICLE PRESENCE ALERT APPARATUS - A vehicle presence alert apparatus for alerting a target object to a presence of the vehicle via an alert sound with a frequency in an audible range is disclosed. The vehicle presence alert apparatus includes: a sound emitter configured to (i) cause a carrier wave with a frequency in an ultrasonic range to carry the alert sound, and (ii) emit the carrier wave carrying the alert sound as a radiation wave toward the target object; a sound receiver configured to receive a reflected wave, the reflected wave being generated due to reflection of the radiation wave by the target object; and relative velocity calculation means for calculating a relative velocity of the target object with respect to the vehicle based on a frequency of the radiation wave and a frequency of the reflected wave. | 02-10-2011 |