Abstract: This invention relates to a cooling structure for cooling a cylinder liner by circulating coolant in a water jacket formed along an outer periphery of the cylinder liner. This cooling structure includes an annular first water reservoir for temporarily storing coolant. This first water reservoir allows the coolant to uniformly flow circumferentially of the cylinder liner. The cooling structure also includes a plurality of coolant passages provided radially for connecting the first water reservoir to the water jacket. The coolant is caused to strike a part of a wall defining the water jacket substantially vertically from the radial coolant passages, thereby to generate turbulent flow in the coolant to efficiently cool the cylinder liner.

Abstract: A bearing structure is provided for a crankshaft and a connecting rod of an internal combustion engine. A single-piece first floating bearing having oil films formed thereon is disposed between a crankpin of the crankshaft and a big end of the connecting rod. A single-piece second floating bearing having oil films formed thereon is disposed between a first journal of the crankshaft and a first main bearing portion provided in a cylinder block. A single-piece third floating bearing having oil films formed thereon is disposed between a second journal of the crankshaft and a second main bearing portion provided in the cylinder block.

Abstract: The size of a power amplifier module is reduced. The power amplifier module includes a module substrate, a lower chip flip-connected to the module substrate, an upper chip stacked face up onto the lower chip, a common electrode disposed on a back surface of the upper chip, plural wires for connecting the upper chip and the module substrate with each other, plural wires for connecting the common electrode and the module substrate with each other, plural chip parts mounted on the module substrate, and a sealing portion formed on the main surface of the module substrate. The common electrode is connected to the module substrate through wires to strengthen the GND of the upper chip. Since the lower chip is flip-connected to the module substrate, the difference in size between the upper and lower chips is diminished to attain a reduction in size of the power amplifier module.

Abstract: A rotary fluid machine is provided that includes a rotor chamber (14), a rotor (41), vanes (48) guided by vane channels formed in the rotor (41), and pistons (47) slidably fitted in cylinders (44) provided in the rotor (41). Rollers (71), which have a greaseless bearing structure and are provided on support shafts (48d) of the vane (48), are rollably engaged with annular channels (74) of a casing (11) so as to interconvert reciprocation of the pistons (47) and rotational movement of the rotor (41). By guiding water for a hydrostatic bearing that supports the vane (48) in the vane channel in a floating state from a recess (48e) of the vane (48) to a hydrostatic bearing (71) of the roller (71) via water passages (W19 to W22), an outer member (71b) of the roller (71) is supported in a floating manner relative to an inner member (71a).

Abstract: An evaporator (11) is provided that carries out heat exchange between exhaust gas discharged from an exhaust port (16B) of an internal combustion engine and water, the evaporator (11) including a large number of heat transfer plates (83) stacked at predetermined intervals from each other in a direction perpendicular to the plane of the paper and a large number of pipe members (90) running through the heat transfer plates (83) and being connected in a zigzag shape at opposite ends, and exhaust gas passages (87, 88, 89) being defined between the heat transfer plates (83) by a partition wall (86) formed by making projections formed on the heat transfer plates (83) abut against each other. While passing through the exhaust gas passages (87, 88, 89), the exhaust gas discharged from the exhaust port (16B) carries out heat exchange with water flowing through the pipe members (90), and the water that has received the thermal energy of the exhaust gas turns into high temperature, high pressure steam.

Abstract: An intake/exhaust valve seal structure for an internal combustion engine is disclosed. A sealing surface is formed by a valve seat surface in a ceiling of a combustion chamber and a valve face surface provided on an intake/exhaust valve. The sealing surface lies on a first conical surface having an axis of the intake/exhaust valve as its rotation axis and includes a line of intersection of the first conical surface with an inner wall face of the ceiling of the combustion chamber. A method for manufacturing the intake/exhaust valve is also disclosed.

Abstract: A coupling structure for coupling a piston and a connecting rod has a protrusion formed on the rear surface of the crown of the piston and having a semi-spherical concavity and a threaded portion concentric to the concavity, a substantially spherical small end formed at one end of the connecting rod, a holder holding the spherical small end of the connecting rod slidably in the semi-spherical concavity of the protrusion and a fixing ring having a threaded portion engaging with the threaded portion of the protrusion for securing the holder to the protrusion of the piston.

Abstract: A connecting rod of an internal combustion engine, and an internal combustion engine including the connecting rod, a piston, a crankshaft and a float bearing as main moving parts. A piston is connected to a connecting rod by a spherical joint and has radial ribs on a rear face of a crown part; a connecting rod is of an integrated, one-piece type having integrally a spherical small end part to be connected to the piston and an annular big end part; the crankshaft is of an assembly type, and a float bearing is interposed between the big end part and a crank pin.

Abstract: A piston for an internal combustion engine includes a crown, tubular walls extending from the edge of the crown, and a cup portion protruding from the rear surface of the crown and having a concave spherical surface for forming a spherical joint with a spherical small end on a connecting rod. The tubular walls and the cup portion are joined together by radially extending ribs.

Abstract: A rotary fluid machine is provided that includes a rotor rotatably housed within a casing, a hollow rotating shaft (113) that rotates integrally with the rotor, and a fixed shaft (102) that is relatively rotatably fitted into the inner periphery of the rotating shaft (113); in which the rotating shaft (113) is formed by shrink-fitting an outer sleeve (21) made of metal around the outer periphery of an inner sleeve (85) made of ceramic, etc. having a lower coefficient of thermal expansion than that of metal, and the fixed shaft (102) is formed by shrink-fitting an outer sleeve (88) made of metal around the outer periphery of an inner sleeve (87) made of ceramic, etc. having a lower coefficient of thermal expansion than that of metal.

Abstract: An outer periphery of an output shaft integral with a rotor of an expander of a vane-type operated by a high-pressure vapor is supported at its opposite ends by a static-pressure bearing mounted at one end thereof in a floated state provided by a liquid film of a pressurized liquid-phase fluid supplied from a pressurized liquid-phase fluid feed bore through a pressurized liquid-phase fluid passage, and by a static-pressure bearing mounted at the other end thereof in a floated state provided by a liquid film of a pressurized liquid-phase fluid supplied from a pressurized liquid-phase fluid feed bore through pressurized liquid-phase fluid passages. Vanes supported radially in the rotor for reciprocal movement are supported in floated states by a liquid film of a pressurized liquid-phase fluid supplied through pressurized liquid-phase fluid passages extending radially outwards within the rotor.

Abstract: A semiconductor device comprising semiconductor chips each formed with plural pads at the main surface, chip parts each formed with connection terminals at both ends thereof, a module substrate on which the semiconductor chips and the chip parts are mounted, solder connection portions for connecting the chip parts and the substrate terminals of the module substrate by soldering, gold wires for connecting the pads of the semiconductor chips and corresponding substrate terminals of the module substrate, and a sealing portion formed with a low elasticity resin such as an insulative silicone resin or a low elasticity epoxy resin for covering the semiconductor chips, chip parts, solder connection portions and gold wires which prevents flow out of the solder in the solder connection portion by re-melting thereby preventing short-circuit.

Abstract: An engine block includes a cylinder head, a plurality of bearing caps for a crankshaft, a cylinder block disposed between the cylinder head and the bearing caps, a plurality of fastening members for fastening the cylinder head and the bearing caps to each other, and a plurality of columnar members interposed between the cylinder head and the bearing caps to receive the fastening forces of the fastening members. Thus, it is possible to provide an engine block including a cylinder block reduced in weight by a remarkable reduction in required strength.

Abstract: An internal combustion engine is provided in which an exhaust port (16) communicating with a combustion chamber (24) formed in a cylinder head (20) is formed from independent exhaust ports (16A), which are positioned on the upstream side, and a grouped exhaust port (16B), in which the plurality of independent exhaust ports (16A) are combined. Water supplied from a supply pump passes through a water passage (W1) of the grouped exhaust port (16B) and a water passage (W2) of the independent exhaust ports (16A) while cooling the exhaust port (16), and a valve seat (29) and valve guide (40) on the periphery of the exhaust port (16), which have high temperatures, thus heating the water itself and thereby recovering waste heat of the internal combustion engine. The heated water carries out heat exchange with exhaust gas in an evaporator provided in an exhaust passage and turns into high temperature, high pressure steam, which drives an expander of a Rankine cycle system.

Abstract: A rotary fluid machine is provided that includes a rotor chamber (14), a rotor (41), vanes (48) guided by vane channels formed in the rotor (41), and pistons (47) slidably fitted in cylinders (44) provided in the rotor (41). Rollers (71), which have a greaseless bearing structure and are provided on support shafts (48d) of the vane (48), are rollably engaged with annular channels (74) of a casing (11) so as to interconvert reciprocation of the pistons (47) and rotational movement of the rotor (41). By guiding water for a hydrostatic bearing that supports the vane (48) in the vane channel in a floating state from a recess (48e) of the vane (48) to a hydrostatic bearing (71) of the roller (71) via water passages (W19 to W22), an outer member (71b) of the roller (71) is supported in a floating manner relative to an inner member (71a).

Abstract: In a solder that realizes high-temperature-side solder bonding in temperature-hierarchical bonding, a connection portion between a semiconductor device and a substrate is formed of metal balls made of Cu or the like and compounds formed of metal balls and Sn, and the metal balls are bonded together by the compounds.

Abstract: A heat exchange system is provided in which low temperature water from a supply pump (15) is split and supplied to an auxiliary evaporator (17) provided so as to cover an exhaust port (16) extending from a combustion chamber of an internal combustion chamber (E) and to a main evaporator (11) provided downstream of the exhaust port (16). The direction of water flowing through the auxiliary evaporator (17) is parallel to the direction of flow of exhaust gas, and as a result an upstream section of the exhaust port (16), which has a high temperature, can be cooled effectively with low temperature water, and the escape of heat from the upstream section of the exhaust port (16) can be suppressed.

Abstract: A cooling block (51) forming a top wall of a combustion chamber (19) of an internal combustion engine is formed by layering, from the outside to the inside, a casing (52), an upper layer block (53), a middle layer block (54), and a lower layer block (55). Labyrinth-shaped cooling water passages (53a, 54a, 55a) are formed on upper faces and side faces of the three layers of blocks (53, 54, 55), and cooling water supplied from a cooling water supply passage (56) flows from the cooling water passage (53a) on the side far from the combustion chamber (19) to the cooling water passage (55a) on the side close to the combustion chamber (19), and is discharged from a cooling water discharge passage (57).

Abstract: An evaporator (11) is provided that carries out heat exchange between exhaust gas discharged from an exhaust port (16B) of an internal combustion engine and water, the evaporator (11) including a large number of heat transfer plates (83) stacked at predetermined intervals from each other in a direction perpendicular to the plane of the paper and a large number of pipe members (90) running through the heat transfer plates (83) and being connected in a zigzag shape at opposite ends, and exhaust gas passages (87, 88, 89) being defined between the heat transfer plates (83) by a partition wall (86) formed by making projections formed on the heat transfer plates (83) abut against each other. While passing through the exhaust gas passages (87, 88, 89), the exhaust gas discharged from the exhaust port (16B) carries out heat exchange with water flowing through the pipe members (90), and the water that has received the thermal energy of the exhaust gas turns into high temperature, high pressure steam.

Abstract: In a rotary fluid machine for converting the reciprocal movement of pistons and the rotational movement of a rotor from one into another by the engagement of rollers and annular grooves with each other, a value in a positive peak region of a pressure load of pistons received by the rollers engaged in the annular grooves and a value of a positive peak region of a centrifugal force load received by the rollers are set, so that they are substantially equal to each other, and phases of the two peak regions are deviated from each other. In addition, the phase negative peak region of a vane pushing-down load received by the rollers and the phase of the positive peak region of the pressure load of the pistons received by the rollers are established, so that they are overlapped at least partially on each other.