Abstract: An internal combustion engine (100) includes a crankcase (128) having a plurality of cylinders (126). An exhaust system (130) is in fluid communication with the plurality of cylinders (126) and includes a turbine (104) in operable association with a compressor (106). An intake system (124) is in fluid communication with the plurality of cylinders (126) and the compressor (106). A first EGR cooler (136) is in fluid communication with the exhaust system (130) through an inlet passage (142) that is connected to the exhaust system (130) between the plurality of cylinders (126) and the turbine (104). A second EGR cooler (140) is in fluid communication with the intake system (124) through an outlet passage (148) that is connected between the plurality of cylinders (126) and the compressor (106). A transfer passage (144) is disposed between the first EGR cooler (136) and the second EGR cooler (140).

Abstract: A screw compressor according to the present invention includes a slide valve adapted to move forward and backward in parallel with the axis of a pair of screw rotors and also includes a plurality of hydraulic cylinders for moving the slide valve forward and backward, the plural hydraulic cylinders imparting, in synchronization with each other, a driving force to the slide valve in the same direction. With this configuration, it is possible to quicken an operation of the slide valve and improve the responsivity in volume control without increasing the diameters of pistons of the hydraulic cylinders for actuating the slide valve and without complicating equipment.

Abstract: A turbocharger, having an axial compressor wheel and an axial turbine wheel mounted on a first shaft supported by a housing, and a radial compressor wheel and a radial turbine wheel mounted on a second shaft, the second shaft concentrically extending around the first shaft and being supported by the housing. The housing defines a first duct extending axially from the exducer of the axial compressor to the inducer of the radial compressor, and a second duct extending axially from the exducer of the radial turbine to the inducer of the axial turbine. A plurality of controllable compressor guide vanes extend through the first duct, and a plurality of controllable turbine stator vanes extend through the second duct. The housing is provided with variable diffuser vanes at the exducer of the radial compressor, and with variable turbine vanes at the inducer of the radial turbine.

Abstract: A method for improving engine torque control during cylinder reactivation and cylinder deactivation for an engine having at least a turbo charger and a variable event valvetrain is presented. The method can improve vehicle drivability during cylinder mode transitions.

Abstract: An internal gear pump (39) of the present invention includes an inner rotor (49) relatively non-rotatably mounted on one end of a pump shaft (22) driven by a crankshaft (9), and an outer rotor (50) rotatably supported by a crankcase (1) and meshed with the inner rotor (49). The pump shaft (22) has a flange (47) formed therein, which flange (47) is rotatably supported by the crankcase (1) and covers one end face of each of the inner and outer rotors (49 and 50).

Abstract: Lubrication of bearing surfaces in a scroll compressor is enhanced by a vent arrangement which makes use of increased centrifugal force, achieved by locating the outlet of the vent arrangement radially outside of the nominal circumference of the compressor's drive shaft, to both remove refrigerant gas from compressor locations where such gas can inhibit the flow and delivery of lubricant to such surfaces and to increase the lift of lubricant out of the compressor's lubricant sump. Oil retained in the upper surface of the compressor drive shaft is made immediately available for bearing lubrication upon compressor start-up to further enhance compressor lubrication.

Abstract: A system, comprising of an internal combustion engine having a combustion chamber with a piston located therein, an intake passage coupled to the combustion chamber, wherein the intake passage supplies intake air to the combustion chamber, an adjustable compressor arranged in the intake passage upstream of the combustion chamber, a throttle arranged in the intake passage upstream of the compressor, and a controller configured to operate the engine so that, at least under some conditions, the piston compresses an air and fuel mixture within the combustion chamber to attain substantial auto-ignition of the mixture; and to increase a boosting of the compressor to increase heating of the intake air, and to decrease the boosting to decrease heating of the intake air, while throttling the intake air with the throttle.

Abstract: A rotary mechanism (10) has an annular (chamber 12) defined by an inner wall (16) of housing (11). A symmetrical two lobed rotor (15) has opposing side faces (21a, 21b) a longitudinal axis between apices (22). A drive shaft (50) eccentrically rotates rotor by a block (51) and slot (52) receprocating arrangement and a second supporting means (53). The centre of the rotor follows a circular orbit in the chamber (12). The apices (22) continuously sweep the inner wall (16) creating cavities (25) of successively increasing and decreasing volumes with associated fluid inolet and exhaust port (31, 35).

Abstract: An air intake structure for a small watercraft for ensuring the capacity of an inter-cooler and for connecting the inter-cooler to a supercharger by a simply shaped communicating portion. In an air intake structure for a small watercraft, an intake passage and an exhaust passage can be disposed on the left side and the right side, respectively, of a plurality of cylinders. A turbocharger is disposed rearwardly of the engine with the turbocharger is connected to an intake passage via an inter-cooler. In addition, the inter-cooler is disposed rearwardly of the engine, with the distribution passage being disposed forwardly of and on the left side of the inter-cooler so as to extend in the forward and rearward direction. The inter-cooler is connected to the rear end of the distribution passage with an intake pipe contiguous to cylinders being bent rearwardly along a side surface of the engine body.

Abstract: A high-performance gear pump that does not require highly accurate machining is disclosed. The gear pump includes a housing having an accommodation chamber. A drive gear and a driven gear are positioned in contact with an inner surface of the accommodation chamber. The drive shaft is loosely received by the shaft hole of the drive gear, and the driven shaft is loosely received by the shaft support formed in the housing and the cover.

Abstract: A rotary fluid machine is provided with a cylinder having an annular cylinder chamber, an annular piston and a blade that form a rotation mechanism. The piston is disposed in the cylinder chamber to be eccentric to the cylinder and divides the cylinder chamber into an outer working chamber and an inner working chamber. The blade is arranged in the cylinder chamber to divide each of the working chambers into a high pressure region and a low pressure region. The cylinder and the piston make relative rotations. A width of the cylinder chamber is varied along a circumference of the cylinder chamber such that a gap between a wall surface of the cylinder and a wall surface of the piston is kept to a predetermined value during the rotations. Further, a width of the piston is varied along a circumference of the piston such that the gap between the wall surface of the cylinder and the wall surface of the piston is kept to a predetermined value during the rotations.

Abstract: The present invention is a fluid machine constituted so as to close moving spaces communicating with an intake opening by at least one pair of members, move them toward a discharge opening and discharge fluid sucked into the intake opening from the discharge opening. The members are arranged so as to form a specific clearance at a position where they are closest to each other, and a leakage prevention mechanism consisting of short fibers is provided on at least one side surface of the members closing the moving spaces.

Abstract: A progressing cavity stator and a method for fabricating such a stator are disclosed. The progressing cavity stator includes first and second elastomer layers fabricated from corresponding first and second elastomer materials. The first and second elastomer materials are selected to have at least one distinct material property. Exemplary embodiments of this invention may reduce tradeoffs associated with elastomer material selection and may further address the heat build up and subsequent elastomer breakdown in the lobes of prior art stators.

Abstract: An engine air supply control method relating to a turbocharged engine including an intake manifold (20) which is disposed downstream of the compressor of the turbocharger (14) and an exhaust manifold (22) which is disposed upstream of the turbine of the turbocharger (14). The method includes determining the mass air flow supplying the engine and/or the pressure in the intake manifold (20) and the temperature in the exhaust manifold. The pressure in the exhaust manifold (22) is determined as a function of the pressure in the intake manifold (20), the engine speed, the temperatures in the cylinders (4) and in the exhaust manifold (22), the pressure in the intake manifold (20) being optionally determined from the mass air flow. Inversely, the pressure in the intake manifold.

Abstract: Provided is an apparatus for preventing overheating of a scroll compressor including a first connection flow path for communicating a high pressure space and a low pressure space in a casing, a second connection flow path for communicating the first connection flow path and the low pressure space in the casing, a fluid refrigerant inflow guide pipe for guiding a fluid refrigerant from a refrigeration cycle system to flow into the low pressure space via the second connection flow path by connecting one side of the refrigeration cycle system with the second connection flow path, and a second connection flow path valve coupled to an inside of the first connection flow path, for opening/closing the second connection flow path according to a pressure difference between the low pressure space and the high pressure space, and a temperature sensing type valve coupled to an inside of the first connection flow path, for opening/closing the first connection flow path according to a temperature of the high pressure space

Abstract: The invention relates to a method for optimizing engine braking in a drive unit, particularly used for motor vehicles, comprising an internal combustion engine consisting of a crankshaft, and an exhaust gas turbine which is connected to a crankshaft via a transfer device. A hydrodynamic coupling is arranged in the transfer device.

Abstract: A control system for an internal combustion engine includes a turbocharger and a throttle valve. The turbocharger that is adapted to supercharging intake air drawn into the internal combustion engine utilizing energy of exhaust gas of the internal combustion engine. The turbocharger includes an electric generator that is adapted to generating regenerative electric power utilizing energy of exhaust gas. The throttle valve is adapted to controlling a flow amount of intake air supercharged using the turbocharger. An operating condition detecting unit is adapted to detecting an operating condition of at least one of the turbocharger and the electric generator. The throttle opening correcting unit is adapted to correcting opening degree of the throttle valve on the basis of the operating condition of the at least one of the turbocharger and the electric generator, when the electric generator regenerates regenerative electric power.

Abstract: A compressor has a cylindrical sealed container, a compression mechanism and a motor. The compression mechanism has a cylinder with an intake passage passing through the cylinder in the radial direction. The sealed container has a coupling member having a tip end face facing the periphery of the intake passage in the outer face of the cylinder and a base end to which an intake pipe is mounted. The tip end face of the coupling member serves as a flat sealed face. A concave groove is formed in a peripheral part around the intake passage in the outer face of the cylinder and an O ring is fitted therein. The O ring is pressed against the tip end face of the coupling member, sealing a gap between the cylinder and the coupling member.

Abstract: A method of designing rotors for a Roots blower comprising a housing having cylindrical chambers, the housing defining an outlet port (19). The blower includes meshed, lobed rotors (37,39) disposed in the chambers, each rotor including a plurality N of lobes (47,49), each lobe having first (47a,49a) and second (47b,49b) axially facing end surfaces. Each lobe has its axially facing surfaces defining a twist angle (TA), and each lobe defines a helix angle (HA). The method of designing the rotor comprises determining a maximum ideal twist angle (TAM) for the lobe as a function of the number N of lobes on the rotor, and then determining a helix angle (HA) for each lobe as a function of the maximum ideal twist angle (TAM) and an axial length (L) between the end surfaces of the lobe. A rotor designed in accordance with this method is also provided.

Abstract: The invention relates to an axial piston engine with a filling pump integrated in a receiving bore of the axial piston engine, which filling pump comprises a gerotor set with an externally toothed inner ring and an internally toothed outer ring and also an inner thrust plate and an outer thrust plate. The two thrust plates enclose the gerotor set between them and, on their surfaces facing away from the gerotor set, are in each case supported via a pressure field seal, which surrounds the pressure field regions formed in the thrust plates, in such a way on the housing walls axially enclosing the filling pump that lateral play in the form of axial mobility of the filling pump is guaranteed.