Abstract: In a frictional drive vehicle, a load acting on the vehicle such as the weight of a rider is converted into a force that urges two frictionally engaging parts (3L, 3R, 25) toward each other. Thereby, the contact pressure between the two frictionally engaging parts is maintained at an optimum level under all conditions. A weight of a rider may be transmitted to a drive member that frictionally engages a main wheel via a four-link parallel link mechanism (40, 50).

Abstract: The omni-directional drive device comprises a main wheel (2) comprising an endless annular member rotatable around a center of cross section perpendicular to a corresponding tangential line, electric motors (5R and 5L) for producing rotative forces around the rotation axis of the main wheel (2) and around the center of cross section perpendicular to a corresponding tangential line of the main wheel (2) and an arrangement (rotary members (4R and 4L) fitted with free rollers (3R and 3L)) for converting the rotational forces of the electric motors (5R and 5L) to the rotational forces around the rotation center of the main wheel (2) and around the center (C) of cross section perpendicular to a corresponding tangential line of the main wheel (2).

Abstract: [Task] Provided is an omni-directional drive device that does not complicate the arrangement for a power source for a drive source such as an electric motor, and achieves a high durability and an ease of maintenance. [Solution] A drive force in a first direction is produced by a movement of a first moveable member (10) itself, and a drive force in a second direction is produced by the rotation of first free rollers (14) retained by the first moveable member, the rotation of the first free rollers (14) being caused by engagement with second free rollers (15) that are retained by a second moveable member (11) and rotative actuation of the second moveable member (11). Electric motors serving as drive sources may be mounted on base members (4 and 5).

Abstract: Provided is an inverted pendulum mobile vehicle such as a single-passenger coaxial two-wheel vehicle which is capable of turning with a small turning radius without causing discomfort to a rider or a vehicle occupant or causing a cargo or the like on the vehicle from shifting or falling off from the vehicle. The vehicle comprises a wheel supporting frame (12), a body frame (12) supported by the wheel supporting frame so as to be rotatable around a vertical axial line and carry a rider and or a cargo and a body coupler (52, 78, 70) that couples the body frame relative to the wheel supporting frame in a prescribed dynamic positional relationship.

Abstract: A piston for an internal combustion engine includes a crown part, a land part extending from the crown part, a skirt part adjoining the land part, and a linking boss protruding from a reverse surface of the crown part and forming a spherical joint with a small end of a connecting rod. The piston is divided into an upper piston part having the land part, and a lower piston part having the skirt part and a plurality of molded plate members formed by press-molding plates.

Abstract: A piston for an internal combustion engine includes a crown part, a land part extending from the crown part, a skirt part adjoining the land part, and a linking boss protruding from a reverse surface of the crown part and forming a spherical joint with a small end of a connecting rod. The piston is divided into an upper piston part having the land part, and a lower piston part having the skirt part and a plurality of molded plate members formed by press-molding plates.

Abstract: Heat transfer members (H4, H3, H2, H1) are sequentially disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in an exhaust passage (33) of an internal combustion engine. The heat transfer surface density (heat transfer area/volume) of the heat transfer members (H4) on the upstream side of the exhaust passage (33) is the lowest, and that of the heat transfer members (H1) on the downstream side is the highest. Thus, even though the temperature of the exhaust gas is higher on the upstream side of the exhaust passage (33) than it is on the downstream side of the exhaust passage (33), a uniform heat transfer performance across all of the heat exchangers (H4, H3, H2, H1) may be maintained.

Abstract: First heat exchangers (H4, H3, H2) are disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in each exhaust passage (33) of a multicylinder internal combustion engine. These first heat exchangers (H4, H3, H2) are independently provided for each of the exhaust passages (33), and a second heat exchanger (H1) is disposed in a section where these exhaust passages (33) are combined. Since the first heat exchangers (H4, H3, H2) are disposed on the upstream side of the exhaust passage (33), high heat exchange efficiency can be obtained by high temperature exhaust gas, and, moreover, the occurrence of exhaust interference can be avoided, thereby preventing any decrease in the output of the internal combustion engine.

Abstract: There is provided an evaporator (23) disposed between an exhaust manifold (22) and an exhaust pipe (24), the evaporator (23) including, in sequence from the upstream side toward the downstream side, a first exhaust gas passage (56) having a third stage heat exchanger (H3), a second exhaust gas passage (55) having a second stage heat exchanger (H2), and a third exhaust gas passage (50) having a first stage heat exchanger (H1). Formed in the annular second exhaust gas passage (55) of the second stage heat exchanger (H2) is a spiral passage divided by a spiral heat transfer plate (68), and arranged in a spiral shape so as to follow the heat transfer plate (68) are a plurality of undulating heat transfer tubes (67) that are stacked out of phase.

Abstract: A component assembly system precisely aligns a plurality of components in a circumferential direction and assembles the components together. A plurality of guide channels extending radially from an axis are formed in a disc-shaped base member. A plurality of slide members on which the upper and lower ends of coils are mounted are supported in the guide channels in a slidable manner. The slide members are positioned so as to make contact with a circular first positioning member by moving the slide members inward along the guide channels in the radial direction and further positioned by fitting a cylindrical second positioning member around the outer periphery of the slide members. In the course of the slide members converging on the circumference of a circle having a center on the axis, the coils mounted on the slide members mesh with each other so as to be unified.

Abstract: First heat exchangers (H4, H3, H2) are disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in each exhaust passage (33) of a multicylinder internal combustion engine. These first heat exchangers (H4, H3, H2) are independently provided for each of the exhaust passages (33), and a second heat exchanger (H1) is disposed in a section where these exhaust passages (33) are combined. Since the first heat exchangers (H4, H3, H2) are disposed on the upstream side of the exhaust passage (33), high heat exchange efficiency can be obtained by high temperature exhaust gas, and, moreover, the occurrence of exhaust interference can be avoided, thereby preventing any decrease in the output of the internal combustion engine.

Abstract: Heat exchangers (H4, H3, H2, H1) are sequentially disposed within an exhaust port (18), within a pre-catalytic device (34), and on the downstream of a main catalytic device (35); the exhaust port (18), the pre-catalytic device (34), and the main catalytic device (35) being provided in an exhaust passage (33) of an internal combustion engine. With regard to the heat transfer surface densities (heat transfer area/volume) of these heat exchangers (H4, H3, H2, H1), that of the heat exchanger (H4) on the upstream side of the exhaust passage (33) is the lowest, and that of the heat exchanger (H1) on the downstream side is the highest.

Abstract: A component assembly system precisely aligns a plurality of components in a circumferential direction and assembles the components together. A plurality of guide channels extending radially from an axis are formed in a disc-shaped base member. A plurality of slide members on which the upper and lower ends of coils are mounted are supported in the guide channels in a slidable manner. The slide members are positioned so as to make contact with a circular first positioning member by moving the slide members inward along the guide channels in the radial direction and further positioned by fitting a cylindrical second positioning member around the outer periphery of the slide members. In the course of the slide members converging on the circumference of a circle having a center on the axis, the coils mounted on the slide members mesh with each other so as to be unified.