Abstract: To provide a head light system comprising first and second bulbs, wherein a coupler can be attached and detached smoothly and the appearance can be made favorable. A first movable-side coupler and a second movable-side coupler are attached to and detached from a first fixed-side coupler for a first bulb and a second fixed-side coupler for a second bulb, respectively. The first fixed-side coupler and the second fixed-side coupler are disposed substantially in the same plane. The attaching and detaching directions of the first and second movable-side couplers are substantially perpendicular to the longitudinal directions of the first bulb and the second bulb. The first fixed-side coupler is so disposed that the second fixed-side coupler is not located in the attaching and detaching direction of the first movable-side coupler attached to and detached from the first fixed-side coupler.

Abstract: A head lamp device includes a structure in which a discharge lamp has a discharge bulb and a reflector of a substantially hemispheric shape arranged in an upper part of a housing. A filament including a filament bulb and a reflector of a substantially hemispheric shape is arranged in a lower part of the housing. The front opening of the lamp housing is covered by a front lens. The discharge bulb can generate two to three times as much luminous flux as a conventional filament bulb. As a result, it is possible to reduce the size of the discharge bulb as compared to the filament bulb. This makes it possible to reduce the overall size of the head lamp device.

Abstract: A pair of right and left headlights are fitted with a front cowl. Each headlight has two lamps laterally arranged. A laterally inner one of the two lamps is a discharge lamp functioning as a low-beam emitting lamp, and a laterally outer one of the two lamps is a halogen lamp functioning as a high-beam emitting lamp. The halogen lamp is higher in position than the discharge lamp. Each headlight further has a reflector surface for the low beam and a reflector surface for the high beam. The reflector surface is larger in size than the reflector surface. A lens is provided on the front side of the reflector surfaces, and the width of a laterally inner portion of the lens is larger than the width of a laterally outer portion of the lens. The low beam emitted from the discharge lamp is reflected on the larger reflector surface to illuminate a wide area, and the high beam emitted from the halogen lamp is reflected on the smaller reflector surface to illuminate a spot area at a distant point.

Abstract: 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 amount of air into an air cleaner depending on vehicle speed. The exhaust control system includes an exhaust control valve, and a primary and a secondary exhaust purifying system located downstream of the exhaust control valve. The flow into the exhaust purifying systems may also be controlled according to engine speed.

Abstract: A headlight includes a low-beam lamp arranged on a longitudinally extending center line of a vehicle body and left and right high-beam lamps arranged on the opposite sides of the low-beam lamp as viewed in plan. This arrangement permits the total reflection area of the reflecting portions of the left and right high-beam lamps can be increased. The lens of the low-beam lamp and the left and right high-beam lamps is integrally formed and largely curved toward the front side of the vehicle body, thereby suppressing an increase in the air resistance by the headlight. Accordingly, the brightness of the headlight can be increased without changing the rated powers of the bulbs of the low-beam lamp and the high-beam lamps. Further, by symmetrically arranging the left and right high-beam lamps with respect to the low-beam lamp, the illumination condition on the road surface by the high beam in the case of cornering to the left can be made similar to that in the case of cornering to the right.

Abstract: 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 amount of air into an air cleaner depending on vehicle speed. The exhaust control system includes an exhaust control valve, and a primary and a secondary exhaust purifying system located downstream of the exhaust control valve. The flow into the exhaust purifying systems may also be controlled according to engine speed.

Abstract: A head lamp device includes a structure in which a discharge lamp has a discharge bulb and a reflector of a substantially hemispheric shape arranged in an upper part of a housing. A filament including a filament bulb and a reflector of a substantially hemispheric shape is arranged in a lower part of the housing. The front opening of the lamp housing is covered by a front lens. The discharge bulb can generate two to three times as much luminous flux as a conventional filament bulb. As a result, it is possible to reduce the size of the discharge bulb as compared to the filament bulb. This makes it possible to reduce the overall size of the head lamp device.

Abstract: A head lamp device includes a structure in which a discharge lamp has a discharge bulb and a reflector of a substantially hemispheric shape arranged in an upper part of a housing. A filament including a filament bulb and a reflector of a substantially hemispheric shape is arranged in a lower part of the housing. The front opening of the lamp housing is covered by a front lens. The discharge bulb can generate two to three times as much luminous flux as a conventional filament bulb. As a result, it is possible to reduce the size of the discharge bulb as compared to the filament bulb. This makes it possible to reduce the overall size of the head lamp device.

Abstract: A head lamp device includes a structure in which a discharge lamp has a discharge bulb and a reflector of a substantially hemispheric shape arranged in an upper part of a housing. A filament including a filament bulb and a reflector of a substantially hemispheric shape is arranged in a lower part of the housing. The front opening of the lamp housing is covered by a front lens. The discharge bulb can generate two to three times as much luminous flux as a conventional filament bulb. As a result, it is possible to reduce the size of the discharge bulb as compared to the filament bulb. This makes it possible to reduce the overall size of the head lamp device.

Abstract: A headlamp cleaner for a motorcycle includes a frame enclosing a headlamp lens. A cleaning nozzle is attached to an upper half of the frame. The nozzle ejects a cleaning agent downwardly over the lens against wind blowing upward during running of the motorcycle. Therefore, it is possible to minimize an amount of the cleaning agent scattered by the wind. Further, vehicle state detecting units are connected to a controller for the headlamp cleaner. No cleaning agent will be ejected, when the vehicle is detected to be in a condition, or state, where the cleaning agent is likely to disperse. The controller, in combination with the downwardly directed nozzle, is thus unlikely to disperse cleaning fluid toward a windscreen or rider of the motorcycle.

Abstract: To shorten a high voltage line connecting a lighting circuit and an electric discharge lamp, and to achieve weight reduction of a stay, in a head lamp of a motorcycle. A stay 26L is attached to a flange 24L, a head lamp 27 is attached to a front end of the stay 26L, and a lighting circuit box 30 is arranged substantially between the head lamp 27 and the flange 24L. The lighting circuit box is arranged on the front side of the head pipe of the motorcycle. Therefore, the lighting circuit box can be located near the head lamp. As a result, the lighting circuit is arranged at a position as near as possible to both the body of the motorcycle and the lamp body, the high voltage line is shortened, and countermeasures against insulation or high frequency hazards can be taken easily and inexpensively.

Abstract: A headlamp for a vehicle includes a lamp housing having an opening portion; a discharge lamp removably contained in the lamp housing; and a lighting circuit unit, mounted in such a manner so as to cover the opening portion from a rear surface side of the lamp housing, for lighting the discharge lamp. A plug is separated from a cord connector when the lighting circuit unit is removed from the lamp housing. Thus, when the work of removing the lighting circuit unit is completed, the plug is necessarily separated from the cord connector, to thereby cut off the power supply to the lighting circuit unit.

Abstract: An immersion tin/lead alloy plating bath has a basic composition comprising an organic sulfonic acid, divalent tin and lead salts of the organic sulfonic acid and thiourea and further contains thiocyanic acid or derivative thereof, optionally with hydrated hydrazine. With this plating bath, an alloy deposit, which has a particularly desired Sn/Pb ratio of 60%/40% or so and is improved in terms of adhesion and homogeneity, can be stably obtained on the surface of copper or a copper alloy in a relatively low temperature region within a short span of time.