Pioneer Electronic Corporation

Honda Giken Kogyo Kabushiki Kaisha

Jsr Corporation

Honda Motor Co., Ltd.

Calsonic Corporation

Hiroshi Soma

Naoki Mitsuta

Nagayuki Kanaoka

Masaru Iguchi

Toshihiro Otsuki

Kintaro Okamoto

Hirokatu Kudo

Etsuro Kadoiri

Yasuki Motozawa

Takekazu Iijima

Kohei Goto

Hiroyuki Suzuki

Yutaka Moriyama

Mayumi Kakuta

Toshihiro Ohtsuki

Kazunori Takagi

Hitoshi Katou

Fusazumi Masaka

Kiyonori Kita

Kenzo Miyazawa

Soichi Ishijimi

Makoto Iyobe

Yoshiaki Miyata

Yoshihisa Takemori

Yutaka Tamura

A solid polymer electrolyte includes a polymer having a sulfonic group and shows high proton conductivity in a wide range of temperatures and humidities and is excellent in hot water resistance and chemical stability. A proton conductive membrane is composed of the electrolyte. The polymer electrolyte includes a polymer having a structural unit represented by the following formula (1a) or (1b): wherein A is a divalent electron-withdrawing group, B is a divalent electron-donating group or a direct bond, Ar is an aromatic group, Z is an oxygen or a sulfur atom, X is a hydrogen or a fluorine atom, j is an integer of 1 or greater, k is an integer of from 1 to 4, l is an integer of from 0 to 10, m is an integer of from 1 to 10, and n is an integer of from 1 to 8.

Polymer electrolyte and proton conductive membrane

Disclosed are a polymer electrolyte having improved hot water resistance and radical resistance, a proton conductive membrane comprising the polymer electrolyte, and a membrane-electrode assembly including the proton conductive membrane. The polymer electrolyte comprises at least one polymer selected from polyether, polyketone, polyetherketone, polysulfone, polyethersulfone, polyimide, polyetherimide, polybenzimidazole, polybenzothiazole, polybenzoxazole and the like. The polymer comprises a repeating structural unit with either or both of an aromatic ring and a heterocyclic ring, and a repeating structural unit represented by the formula (1): wherein X is a single bond, an electron-withdrawing group or an electron-donating group; R is a single bond, &#x2014;(CH)&#x2014; or &#x2014;(CF)&#x2014; where q ranges from 1 to 10; m is from 0 to 10; k is from 0 to 5; l is from 0 to 4; and k+1&#x2267;1.

Polymer electrolyte, proton conductive membrane and membrane-electrode assembly

Described herein is a production method of sulfonated polyarylene that is safe and enables easy control of the amount and position of sulfonic groups introduced in the polymer. The sulfonated polyarylene is also disclosed. The invention further provides a polyarylene and an aromatic sulfonate derivative that are suitably employed in the above production method. Also provided are a macromolecular solid electrolyte that comprises the sulfonated polyarylene, and a proton conductive membrane. The aromatic sulfonate derivative has the following formula (1): wherein X is a halogen atom other than fluorine, a &#x2014;OSOCHgroup or a &#x2014;OSOCFgroup; Y is a divalent organic group; A is &#x2014;(CH)&#x2014; or &#x2014;(CF)&#x2014; (wherein m is an integer of 1 to 10); and R is a Chydrocarbon group. The production method of sulfonated polyarylene comprises coupling polymerization of an aromatic compound that includes at least the aromatic sulfonate derivative of the formula (1) and hydrolysis of the resultant polyarylene.

Aromatic sulfonate derivative, polyarylene, sulfonated polyarylene and production method thereof, macromolecular solid electrolyte, and proton conductive membrane

The invention provides a proton conductive membrane excellent in heat resistance, which has sulfonic acid as ion exchange groups. The proton conductive membrane comprises a nitrogen-containing compound that can be mixed with water in arbitrary proportions and has a boiling point of not lower than 100. degree. C. and a proton conductive resin which has sulfonic acid ion-exchange groups, wherein the nitrogen-containing compound is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the proton conductive resin.

Proton conductive membrane having improved thermal stability

An electronically controlled active exhaust-noise attenuation muffler, comprises a loudspeaker serving as a secondary sound source arranged upstream of a tailpipe and communicating with an interior of an exhaust pipe, for attenuating a noise level of exhaust noise produced by the exhaust system by emitting a secondary sound, which is in opposite phase to the exhaust noise, into the exhaust pipe. The tailpipe is formed in a flared-out fashion so that a cross-sectional area of the tailpipe gradually increases towards a downstream end thereof, to reduce pressure loss in exhaust gas flow in the exhaust pipe by radiating the exhaust gas through the flared-out tailpipe. The tailpipe section is a high-frequency exhaust noise attenuation structure to attenuate a high-frequency noise component propagated with a moving stream of the exhaust gases.

Active exhaust-noise attenuation muffler

A car speaker system which can be used to radiate sound either inside the vehicle in normal driving use or outside the vehicle when the vehicle is parked. A plurality of speaker units are mounted in a closed cabinet and the cabinet is swingably mounted along one side thereof in a casing. In a first swinging position of the cabinet, the speaker mounting surface of the cabinet is flush with the ceiling panel and the speakers radiate sound downwards into the passenger compartment of the vehicle, while in a second swinging position of the cabinet, the speaker mounting surface is perpendicular to the ceiling panel and the speakers face rearwards to radiate sound to the exterior through an open hatchback door.

Car speaker system

A composite speaker system for automotive vehicles in which a low-range speaker unit is mounted flush with a rear parcel shelf of the vehicle and a medium- and high-range speaker is mounted above the low-range speaker having an angular orientation which is adjustable in a vertical plane with respect to the center axis of the low-range speaker wherein the medium- and high-range speaker can be directed into the passenger compartment without reflection from the rear window. In one embodiment, the medium- and high-range speaker is rotatably mounted upon a grill frame which is detachably disposed upon and engaged with the open surface of the low-range speaker. In a second embodiment, first and second spacers extend from the center of the low-range speaker through the grill frame for the low-range speaker. In this case, the medium- and high-range speaker is tiltably mounted upon the upper end of the spacers. The medium- and high-range speaker may also be made horizontally rotatable.

Automotive loudspeaker having variable speaker orientation and

A speaker unit for an automotive vehicle including a woofer speaker flush mounted with the rear parcel shelf of the vehicle with a tweeter or medium- and high-range speaker unit mounted to the rear of the woofer speaker. The tweeter speaker is directed toward the passenger compartment of the vehicle. A woofer frame is detachably coupled around the outer edge of the woofer speaker. The woofer frame supports a grill which extends as well over the tweeter speaker. A sound diffuser is positioned over the open surface of the tweeter speaker.

Speaker unit for automotive vehicles

A speaker assembly in an automobile located substantially at the intersection of an inside side panel and the ceiling of the automobile. The speaker unit is fixed on a baffle plate and the combination is bolted by means of a fixture to the upper part of said side panel. A packing material positioned on a part of the periphery of the baffle plate forms a tight seal with the inside ceiling material of the automobile.

Sound reproducing apparatus in the inside of a car

A speaker assembly adapted for mounting at the surface of the ceiling of a car. The assembly includes a first stay attached to the speaker and having arms with ends thereof for engaging the side and back ceiling rails of the car when the speaker is positioned in the corner of the ceiling below the ceiling fabric. A corner stay also attached to the speaker has a hook for engaging the ceiling rail at the corner thereof and a biasing spring for biasing the stay and hook against said rail.

Car loud speaker

An embedded type speaker has the speaker body mounted on a wall by inserting the speaker within a mounting opening within the wall. A grill is detachably mounted in overlying fashion in front of the speaker body with the grill consisting of an annular grill frame having circumferentially spaced sound communicating holes at the peripheral portion and a large central opening therein. A support strip extends transversely across the central opening of the grill frame from one side of the frame to the other. A grill sheet overlies the grill frame to close off the central opening and has the same appearance and is preferably formed of the same material as that overlying the wall surface, facing in the same direction as the speaker. A packing is provided between the peripheral portion of the grill sheet and the periphery of the grill frame and a connecting member couples the center of the grill sheet to the center of the support strip.

Growing community of inventors

Wako, Japan

Hiroshi Soma