Abstract: A turbine includes a turbine housing having a scroll flow passage and a gas inflow passage fluidly coupled to the scroll flow passage, and a variable nozzle assembly located inside the turbine housing. The variable nozzle assembly includes a plurality of nozzle vanes located in the gas inflow passage and a plurality of vane shafts separately fixed to the nozzle vanes. The plurality of nozzle vanes includes a first nozzle vane and a number of second nozzle vanes. A width of the first nozzle vane in an axial direction of the vane shafts is smaller than a width of each of the second nozzle vane in the axial direction of the vane shafts.

Abstract: A turbocharger includes: a mixed flow turbine including a turbine wheel; a turbine housing configured to house the turbine wheel, including a gas passage extending toward a leading edge of a blade of the turbine wheel; and nozzle vanes arranged in the gas passage in the circumferential direction of the turbine wheel, mutually adjacent two of the nozzle vanes forming a throat therebetween. Each nozzle vane is twisted with respect to a trailing edge of the nozzle vane as a twist center such that a width of the throat becomes narrower on the shroud side than on the hub side.

Abstract: A turbine includes: a housing including an accommodating portion accommodating a turbine impeller; a first turbine scroll flow path communicating with the accommodating portion; a second turbine scroll flow path communicating with the accommodating portion and having a volume larger than a volume of the first turbine scroll flow path; a valve seat having a first port and a second port, the first port communicating with the first turbine scroll flow path, the second port communicating with the second turbine scroll flow path and having an opening area smaller than an opening area of the first port; a valve configured to contact the valve seat; and a shaft holding the valve and arranged on a side opposite to the first port with respect to the second port.

Abstract: A turbine includes: an inner diameter side exhaust flow path; an outer diameter side exhaust flow path having a flow path cross-sectional area smaller than a flow path cross-sectional area of the inner diameter side exhaust flow path; an inner diameter side bypass flow path connecting the inner diameter side exhaust flow path and a discharge flow path; and an outer diameter side bypass flow path connecting the outer diameter side exhaust flow path and the discharge flow path, the outer diameter side bypass flow path having a flow path cross-sectional area larger than a flow path cross-sectional area of the inner diameter side bypass flow path.

Abstract: A turbine includes: a housing including an accommodating portion accommodating a turbine impeller; a first turbine scroll flow path communicating with the accommodating portion; a second turbine scroll flow path communicating with the accommodating portion and having a volume larger than a volume of the first turbine scroll flow path; a valve seat having a first port and a second port, the first port communicating with the first turbine scroll flow path, the second port communicating with the second turbine scroll flow path and having an opening area smaller than an opening area of the first port; a valve configured to contact the valve seat; and a shaft holding the valve and arranged on a side opposite to the first port with respect to the second port.

Abstract: A turbocharger includes: a mixed flow turbine including a turbine wheel; a turbine housing configured to house the turbine wheel, including a gas passage extending toward a leading edge of a blade of the turbine wheel; and nozzle vanes arranged in the gas passage in the circumferential direction of the turbine wheel, mutually adjacent two of the nozzle vanes forming a throat therebetween. Each nozzle vane is twisted with respect to a trailing edge of the nozzle vane as a twist center such that a width of the throat becomes narrower on the shroud side than on the hub side.

Abstract: A turbine includes: an inner diameter side exhaust flow path; an outer diameter side exhaust flow path having a flow path cross-sectional area smaller than a flow path cross-sectional area of the inner diameter side exhaust flow path; an inner diameter side bypass flow path connecting the inner diameter side exhaust flow path and a discharge flow path; and an outer diameter side bypass flow path connecting the outer diameter side exhaust flow path and the discharge flow path, the outer diameter side bypass flow path having a flow path cross-sectional area larger than a flow path cross-sectional area of the inner diameter side bypass flow path.

Abstract: A turbocharger includes a turbine housing having a hub-side scroll flow path and a shroud-side scroll flow path, and a turbine wheel having front edges for receiving a working fluid from the hub-side scroll flow path and the shroud-side scroll flow path. Each front edge of the turbine wheel includes a first portion for receiving the working fluid flowing out from the hub-side scroll flow path, and a second portion for receiving the working fluid flowing out from the shroud-side scroll flow path. The first portion is inclined with respect to a virtual plane including a rotational axis in a direction opposite a rotational direction of the turbine wheel. The second portion is inclined with respect to the virtual plane in the rotational direction.

Abstract: A turbocharger includes a turbine impeller, a turbine housing which includes a scroll portion and a discharge port, a bypassing passage portion which guides a working fluid from the scroll portion to the discharge port, and a valve portion which controls the inflow of the working fluid to the bypassing passage portion. The hub side scroll is formed so that a cross-sectional area of a passage is larger than that of a shroud side scroll. The valve portion includes a hub side valve which controls the inflow of the working fluid from the hub side scroll to the bypassing passage portion and a shroud side valve which controls the inflow of the working fluid from the shroud side scroll to the bypassing passage portion. An operation of opening and closing the hub side valve is independent from an operation of opening and closing the shroud side valve.

Abstract: A turbocharger includes a turbine impeller, a turbine housing which includes a scroll portion and a discharge port, a bypassing passage portion which guides a working fluid from the scroll portion to the discharge port, and a valve portion which controls the inflow of the working fluid to the bypassing passage portion. The hub side scroll is formed so that a cross-sectional area of a passage is larger than that of a shroud side scroll. The valve portion includes a hub side valve which controls the inflow of the working fluid from the hub side scroll to the bypassing passage portion and a shroud side valve which controls the inflow of the working fluid from the shroud side scroll to the bypassing passage portion. An operation of opening and closing the hub side valve is independent from an operation of opening and closing the shroud side valve.

Abstract: A turbocharger includes a turbine housing having a hub-side scroll flow path and a shroud-side scroll flow path, and a turbine wheel having front edges for receiving a working fluid from the hub-side scroll flow path and the shroud-side scroll flow path. Each front edge of the turbine wheel includes a first portion for receiving the working fluid flowing out from the hub-side scroll flow path, and a second portion for receiving the working fluid flowing out from the shroud-side scroll flow path. The first portion is inclined with respect to a virtual plane including a rotational axis in a direction opposite a rotational direction of the turbine wheel. The second portion is inclined with respect to the virtual plane in the rotational direction.

Abstract: A diffuser includes a ring-shaped parallel part, and a ring-shaped throttling part formed continuously to the inside of the parallel part in a radial direction. A wall surface of the throttling part includes a flow passage area minimum portion which makes minimal a flow passage area of the diffuser, and a ring-shaped protruding portion located closer to the outlet side of the compressor wheel than the flow passage area minimum portion, and protruding toward the flow passage of the diffuser.

Abstract: This relates to a nozzle blade in which the leading edge shape has a curved-line shape that is formed by the distance from the rotation axis of the nozzle blade to the leading edge changing depending on the nozzle blade height position, and the trailing edge shape has a straight-line shape that is formed by the distance from the rotation axis of the nozzle blade to the trailing edge being constant irrespective of the nozzle blade height position.

Abstract: A diffuser includes a ring-shaped parallel part, and a ring-shaped throttling part formed continuously to the inside of the parallel part in a radial direction. A wall surface of the throttling part includes a flow passage area minimum portion which makes minimal a flow passage area of the diffuser, and a ring-shaped protruding portion located closer to the outlet side of the compressor wheel than the flow passage area minimum portion, and protruding toward the flow passage of the diffuser.

Abstract: A variable capacity type turbocharger includes a bearing housing which rotatably supports a turbine impeller; a turbine housing; and an exhaust nozzle, wherein the exhaust nozzle includes a pair of exhaust introduction walls forming a passageway of the exhaust gas and a plurality of nozzle vanes disposed between the pair of exhaust introduction walls and supported to be rotatable about the turbine impeller, and wherein each nozzle vane includes a high-pressure wall surface facing the scroll passageway, the bearing housing side of the high-pressure wall surface is provided to be closer to the turbine impeller than the turbine housing side thereof, and when the turbine impeller rotates, the nozzle vane moves toward the turbine housing.

Abstract: This relates to a nozzle blade in which the leading edge shape has a curved-line shape that is formed by the distance from the rotation axis of the nozzle blade to the leading edge changing depending on the nozzle blade height position, and the trailing edge shape has a straight-line shape that is formed by the distance from the rotation axis of the nozzle blade to the trailing edge being constant irrespective of the nozzle blade height position.

Abstract: A variable capacity type turbocharger is provided including: a bearing housing which rotatably supports a turbine impeller; a turbine housing which has a scroll passageway formed therein to supply an exhaust gas to the turbine impeller; and an exhaust nozzle which changes a flow rate and a stream angle of the exhaust gas supplied from the scroll passageway to the turbine impeller, wherein the exhaust nozzle includes a pair of exhaust introduction walls forming a passageway of the exhaust gas and a plurality of nozzle vanes disposed between the pair of exhaust introduction walls and supported to be rotatable about the turbine impeller, and wherein each nozzle vane includes a high-pressure wall surface facing the scroll passageway, the bearing housing side of the high-pressure wall surface is provided to be closer to the turbine impeller than the turbine housing side thereof, and when the turbine impeller rotates, the nozzle vane moves toward the turbine housing or is pressed toward the turbine housing side of

Abstract: The present invention makes it possible to simplify the work of maintaining the covering performance of a covering layer by a method for maintaining a floor covering layer whereby the covering performance of a covering layer B that is formed on a floor (A) and covers the floor (A) can be maintained. In this method, the resin covering layer B having a thickness (T0) of 30 to 100 ?m is formed on the floor. The surface of the resin covering layer B is subjected to dry grinding without the use of a liquid by using grinding pads (6) and (7) provided with grinding surfaces (6a) and (7a) that move along one direction. The generated grindings are recovered, and a layering material (26) for the resin covering layer is then coated onto the resin covering layer (B) to restore the thickness (T1) of the resin covering layer (B), which has been reduced by grinding, to substantially an original thickness (T0).

Abstract: An electric-motored floor-surface polisher includes a pair of pads juxtaposed in the front and rear or lateral direction of an apparatus frame, each pad being slidably supported to the apparatus frame. A drive pulley coupled to an output shaft of an electric motor to be rotated therewith.

Abstract: An electric-motored floor-surface polisher includes a pair of pads juxtaposed in the front and rear or lateral direction of an apparatus frame, each pad being slidably supported to the apparatus frame. A drive pulley coupled to an output shaft of an electric motor to be rotated therewith.