Abstract: A cowl top 7 includes a tubular peripheral wall 71 provided above a dash panel 104, with its upper portion 73 extending along a lower edge of a front wind shield 105, the upper portion 73 of the peripheral wall 71 having a front communication aperture 75 and a rear communication aperture 76 formed for air communication between atmosphere and the interior of the tubular peripheral wall 71, and a diluter 6 includes an air inlet aperture area 62 communicating with the interior of an air discharge duct 4, an air outlet aperture area 63 communicating with the interior of the tubular peripheral wall 71, and a dilution chamber 61 made up to introduce fuel gas discharged from a fuel cell stack 3, dilute introduced fuel gas with air introduced through the air inlet aperture area 62, and discharge diluted fuel gas through the air outlet aperture area 63.

Abstract: To achieve smooth drawing of air into a fuel cell, the air-flow resistance of an exhaust passage is reduced and intrusion of water into an exhaust duct is prevented. In the present invention, in an exhaust device of a fuel cell vehicle, an exhaust chamber is attached to a lower surface of the front hood, the exhaust duct extends upward in a vertical direction from a rear portion of a fuel cell case, an exhaust port at an upper end of the exhaust duct opens to an interior of the exhaust chamber, a penetrating hole through which the inside of the exhaust chamber communicates with the outside space, is formed in the front hood in a portion in front of the exhaust port in a vehicle front and rear direction, the penetrating hole is covered with a cover, and an opening portion opening toward a rear side of the vehicle and being positioned above and away from an upper surface of the front hood, is formed in the cover.

Abstract: In an intake device for a fuel cell vehicle in which an intake duct supplies air to a fuel cell housed in a fuel cell case as a reaction gas, the intake duct includes a pair of top and bottom walls and a pair of left and right side walls, the top wall curves downward while extending from a front face of the fuel cell case toward the front side of vehicle, and an air introduction port opening toward a lower side of the vehicle is formed between a lower end portion of the top wall and a front end portion of the bottom wall.

Abstract: An object of the present invention is to increase the vehicle compartment space of a fuel cell vehicle, to reduce the air-flow resistance by extending an exhaust duct straight, and to improve the cooling performance on an air-cooled fuel cell stack by increasing the amount of air introduced into the air-cooled fuel cell stack. For this purpose, an air-cooled fuel cell vehicle includes, at a rear portion of the fuel cell vehicle: a motor configured to drive a rear wheel: an air-cooled fuel cell stack including an air intake section configured to take in air used as a reacting gas and also as a cooling medium, and an air exhaust section configured to discharge an excess reacting gas containing air and hydrogen; an intake duct mounted on the air intake section; and an exhaust duct mounted on the air exhaust section and extending to a rear end portion of the fuel cell vehicle.

Abstract: The cooling performance on an air-cooled fuel cell and a radiator for cooling electrical equipment is improved in an air-cooled fuel cell vehicle. The air-cooled fuel cell includes: air inlets respectively at both side portions in a vehicle width direction; and air outlets and an exhaust duct at a central portion in the vehicle width direction, the exhaust duct configured to discharge air flowing out of the air outlets to a rear side of the vehicle. Intake ducts extending toward the front portion of the vehicle are respectively connected to the air inlets. Air intake ports of the intake ducts are respectively opened at both side portions, in the vehicle width direction, of a radiator and at positions closer to the front portion of the vehicle than the radiator.

Abstract: Fabry-Perot etalon type tunable wavelength-selective filter comprises: a first layer including a transparent electrode and an optical mirror layer; a third layer including a transparent electrode and an optical mirror layer; and a second layer which is composed of a material with a refractive index variable with electric field, and sandwiched between the first layer and the third layer, wherein the material having a refractive index variable with electric field is composed by dispersing liquid crystal droplets equal to or less than 150 nm in diameter in a light transmissive characteristic medium such as a polymer or silica glass, and by adding plasticizer therein. In this structure, the optical mirror layer consists of a dielectric multilayer mirror with an optical reflectance of equal to or more than 95% for 1.

Abstract: In this invention, a mixture of a diazotizing reagent which reacts with nitrous ions to produce a diazo compound, a coupling reagent which couples with a diazo compound to produce an azo dye, and an acid is placed in pores of a transparent porous body to prepare a sensor element. Nitrogen dioxide gas is sensed in accordance with a color change before and after the sensor element is exposed to air to be measured for a predetermined time.

Abstract: Two optical waveguides comprising a light transmitting medium are disposed close to each other on a substrate, and electrodes are disposed parallel to each other so as to sandwich one optical waveguide. The light transmitting medium is formed by dispersing fine droplets of a liquid crystal in a light transmitting material, such as glass or polymer, the liquid crystal fine droplets having droplet diameters of about one digit smaller (that is, about an order of magnitude smaller) than the wavelength of light. Linearly polarized light having a plane of polarization in a direction parallel to the direction of application of voltage to the optical waveguide, i.e., in the direction of the substrate surface, is fed as input lights into the optical waveguides. Upon application of voltage, the refractive index of one optical waveguide changes, while the refractive index of the other optical waveguide remains unchanged. Hence, the coupling ratio changes, achieving an optical switch.

Abstract: A nonlinear optical device having an optical medium and an optical element including a polarizer, an optical resonator and a reflector is provided. The optical medium includes an organic nonlinear optical material represented by a formula: ##STR1## wherein each of R.sub.1 and R.sub.2 is an alkyl group having 2 to 6 carbon atoms or a hydroxyalkyl group having 2 to 6 carbon atoms, R.sub.1 and R.sub.2 being same or different groups; or R.sub.1 is an ethyl group and R.sub.2 is an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) or a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and each of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is individually a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, or an alkylamide group, where X.sub.1, X.sub.2, X.sub.3 and X.sub.4 may be the same or different groups.

Abstract: An organic nonlinear optical device having a nitrostyrene compound represented by a formula: ##STR1## wherein R.sub.1 is an ethyl group R.sub.2 is a group selected from the group consisting of an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) and a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are the same or different and each is selected from the group consisting of a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, and an alkylamide group, is provided.

Abstract: The lower edge of the peripheral wall of a can cap and the upper edge of a can barrel are spaced from each other by a gap therebetween. Streams of an inert gas from different groups of injector nozzles are injected, from outside of the gap, through the gap into the can cap and the can barrel, respectively, to replace air in the can cap and the can barrel with the injected gas. Then, the can barrel is fitted in to the can cap, and welded thereto to entrap the injected gas in the can barrel and the can cap.

Abstract: Small-sized pressure vessels made of sheet metal which are suitable for the storage and carriage of pressurized liquid, pressurized gas and the like are provided herein, and also the method of manufacturing these pressure vessels which comprises in combination a process in which two cup-shaped pieces made of sheet metal are fitted, or a jointing ring made of metal or synthetic resin is fitted to the open end of one of both cup-shaped pieces along its inner or outer circumferential surface, and hot-melting type adhesives are applied to the jointing surface of each cup-shaped piece to which the jointing ring is attached and the jointing ring itself or the open end of the other cup-shaped piece. Also both cup-shaped pieces may be butted or fitted in their open ends in which, for example, one cup-shaped piece which has the jointing ring fitted thereto and the other cup-shaped piece are heated to 120.degree. C.-250.degree. C. to melt the adhesives and are then cooled to solidify the adhesives.

Abstract: A swash plate type compressor to provide reciprocation of cylindrical guide members arranged around a driving shaft axis and a corresponding number of pistons respectively connected to the cylindrical guide members with lubricating means arranged in compartments to prevent leakage of lubricant to the pistons.