Abstract: A turbine housing includes a first shell member and a third shell member, which are formed from metal sheets and forming a housing body, and a tongue member, which is fixed to inner circumferential surfaces of the shell members and discrete from the shell members. The tongue member defines an inlet port and a scroll compartment in the housing body.

Abstract: A second recirculation passage recirculates blow-by gas at an upstream section, which is upstream of an impeller of a turbocharger in an intake passage. A first passage branches and extends from a downstream section, which is downstream of the impeller in the intake passage. A second passage that forms part of the second recirculation passage connects the first passage and the upstream section to each other. A third passage, which is provided separately from the second passage, connects the first passage and the upstream section to each other. A change mechanism changes, in different manners, the flow rate of compressed gas recirculating to the upstream section through the second passage, and the flow rate of compressed gas recirculating to the upstream section through the third passage.

Abstract: An internal combustion engine includes: a cylinder block including multiple cylinders; a cylinder head; and a turbocharger including an inlet port connected to an exhaust outlet of the cylinder head. The inlet port includes a first wall portion located between one cylinder out of the two outermost cylinders and the central axis of the inlet port in the cylinder array direction, and a second wall portion located on the opposite side of the central axis of the inlet port from the first wall portion. The first wall portion includes a thick-walled portion that is greater in thickness than the second wall portion, and a thin-walled portion that is smaller in thickness than the thick-walled portion and is located upstream of the thick-walled portion in the direction of exhaust gas flow.

Abstract: A compressor housing for a turbocharger and a method for manufacturing the same. The method includes steps of preparing a scroll piece having an intake port forming portion forming an intake port, an intake-side wall surface of a scroll chamber, and a scroll outer peripheral portion covering an outer peripheral side of the scroll chamber; preparing a shroud piece having a cylindrical shroud press-fit portion to be press fitted into the intake port forming portion, an inner circumferential wall surface of the scroll chamber, and a recessed portion formed on a wall surface covering an outer peripheral side of an impeller; forming an abradable seal having a shroud surface by injection molding of resin into the recessed portion; and press fitting the shroud press-fit portion into the intake port forming portion.

Abstract: A turbocharger includes a turbine impeller, a rotating shaft, a bearing housing, a turbine housing. The turbine housing includes a scroll passage and a second flange. The turbine housing has an outer surface provided with a recessed portion, the recessed portion is provided between the scroll passage and the second flange. The recessed portion is a depressed portion toward an inner surface of the turbine housing from the outer surface of the turbine housing. The bearing housing has a main passage. The second flange has an extending passage. The main passage is connected to the extending passage so as to constitute a first coolant passage. The turbine housing has a second coolant passage around the scroll passage.

Abstract: An imbalance correction position of a turbine wheel head is irradiated with a laser beam so that an outer peripheral portion of the turbine wheel head is left, and a groove provided by the laser irradiation is provided so that a depth of the groove is shallower toward a side closer to an outer periphery of the turbine wheel head. This makes it possible to secure a strength of a base part of an outer peripheral portion (an outer wall) of the groove, thereby making it possible to restrain deformation of the outer peripheral portion of the groove due to a centrifugal force acting by rotation of the turbine wheel head.

Abstract: A single-body balance correction range in which a weight has been removed by single-body balance correction performed on a turbine wheel (a rotor) as a single body is calculated, an assembly balance correction range is calculated in an assembled state of the turbine wheel, and assembly balance correction is performed in a case where the single-body balance correction range and the assembly balance correction range overlap each other, such that an outermost diameter of an arc-shaped assembly-balance correction groove provided by removal of an inner part of a turbine wheel head is smaller than a remaining height a of the single-body balance correction range. By such a correction process, it is possible to perform weight removal for assembly balance correction by excluding a range in which the weight has been removed by the single-body balance correction, thereby making it possible to restrain an indicated value of a weight removal amount from deviating from an actual weight removal amount.

Abstract: A balance of a rotating body is measured by a balance measuring device while the rotating body is rotated. The balance of the rotating body is corrected by irradiating a laser with a laser radiation device at a first processing portion of the rotating body that is set based on the measurement result and removing that processing portion. After the first processing portion of the rotating body is removed, the balance of the rotating body is measured again. If the measurement result is a result in which the balance correction is insufficient, the rotating body is rotated at a speed lower than a rotation speed of the rotating body when the first processing portion is removed, and the laser is irradiated by the laser irradiating portion at a second processing portion of the rotating body set based on the result of measuring the balance again, and the second processing portion is removed.

Abstract: A method of manufacturing a laser diode array capable of inhibiting electric cross talk is provided. The method of manufacturing a laser diode array includes a processing step of forming a peel layer containing an oxidizable material and a vertical resonator structure over a first substrate sequentially from the first substrate side by crystal growth, and then selectively etching the peel layer and the vertical resonator structure to the first substrate, thereby processing into a columnar shape, a peeling step of oxidizing the peel layer from a side face, and then peeling the vertical resonator structure of columnar shape from the first substrate, and a rearrangement step of jointing a plurality of vertical resonator structures of columnar shape obtained by the peeling step to a surface of a metal layer of a second substrate formed with the metal layer on the surface.

Abstract: The control apparatus includes a transient-state ignition-timing correction unit in which, in order to set a change in ignition timing made coincident with a change in an internal EGR temperature and also made coincident with the strength of the transient when the transient operating state occurs, an ignition-timing correction-coefficient during the transient operating state and after the transient operating state is calculated in accordance with an internal EGR temperature discrepancy-degree derived from the internal EGR temperature and a steady-state exhaust-gas temperature, and with transient strength derived from a magnitude of change in the operating state and an elapse time since the transient operating state has started, and the ignition timing is corrected by a transient-state ignition-timing correction-coefficient.

Abstract: An exhaust system structure for an internal combustion engine is provided with an exhaust manifold and a plate-like heat shielding member. The exhaust manifold has branch pipes and flanges formed at the distal ends of the branch pipes. The heat shielding member covers the exhaust manifold and suppresses the occurrence of heat damage caused by the exhaust manifold. The basal portion of the heat shielding member and the flanges are fastened to the cylinder head by common fastening members.

Abstract: A strain measurement apparatus includes: a stereo camera device that produces a first stereo image and a second stereo image of a measurement object; an actual strain calculation portion configured to find a three-dimensional configuration of the measurement object from the first stereo image and the second stereo image to find actual strain of the measurement object; a temperature distribution detector that detects a temperature distribution of the measurement object; a free thermal strain calculation portion configured to find free thermal strain of the measurement object from the temperature distribution detected by the temperature distribution detector; and a constraint strain calculation portion configured to find as constraint strain of the measurement object a difference obtained by subtracting the free thermal strain found by the free thermal strain calculation portion from the actual strain found by the actual strain calculation portion.

Abstract: Embodiments of the present invention relate to a rotor for an electric motor, and an object of some embodiments is to maintain a rotor sub-assembly at an appropriate position without using a spacer and without applying excessive compressive stress to a magnet. A magnet and an end-plate are press-fitted into a ring-shaped member to form a rotor sub-assembly. A shaft is passed through the rotor sub-assembly. A nut is fastened onto the shaft, and fixes the axial position of the rotor sub-assembly with respect to the shaft. The shaft includes a step at which the shape of the shaft changes between a small-diameter portion and a large-diameter portion. An end face of the large-diameter portion that is exposed to outside of the small-diameter portion is adopted as a reference face. The end-plate is mounted to the ring-shaped member so as to oppose an axial end portion of the magnet.

Abstract: A turbine housing includes an outer housing member, which has a proximal housing portion and a distal housing portion, and an inner housing member, which is provided inside the outer housing member and has a shroud surface that faces a turbine wheel in an axial direction. A distal portion of the inner housing member serves as a slide portion slidable in the axial direction. Further, a proximal portion of the inner housing member is fixed to the proximal housing portion at a part closer to a distal side than a proximal portion of the proximal housing portion. Further, a scroll portion is formed by the inner housing member and a proximal scroll portion of the proximal housing portion located closer to a proximal side than the inner housing member.

Abstract: A turbocharger includes a turbine impeller, a rotating shaft, a bearing housing, a turbine housing. The turbine housing includes a scroll passage and a second flange. The turbine housing has an outer surface provided with a recessed portion, the recessed portion is provided between the scroll passage and the second flange. The recessed portion is a depressed portion toward an inner surface of the turbine housing from the outer surface of the turbine housing. The bearing housing has a main passage. The second flange has an extending passage. The main passage is connected to the extending passage so as to constitute a first coolant passage. The turbine housing has a second coolant passage around the scroll passage.

Abstract: A turbocharger includes a turbine housing, a compressor housing, and a bearing housing. Each of the housings includes a passage for cooling inside. The turbocharger further includes a switching valve and a controller that switches a valve position of the switching valve. The switching valve is adapted to switch the circulation state of coolant in each passage such that the coolant is supplied from the passage of the turbine housing to the passage of the bearing housing or such that the coolant is supplied from another passage to the passage of the bearing housing. The controller switches the valve position of the switching valve such that the coolant is supplied from the passage of the turbine housing to the passage of the bearing housing until a predetermined amount of time passes after starting of the engine.

Abstract: A bearing structure for a turbocharger includes a center housing, which is arranged between a turbine wheel and a compressor wheel and has an insertion hole, a rotary shaft, which is inserted through the insertion hole and couples the turbine wheel to the compressor wheel, a pair of bearing members, which is press-fitted into the gap between the rotary shaft and the center housing and rotationally supports the rotary shaft, and a restriction member, which is held by the rotary shaft at a position between the bearing members and restricts the movement of the rotary shaft in the thrust direction by engaging with the bearing members. The bearing members have engagement surfaces engaging with the restriction member. An oil supply opening is formed in each of the engagement surfaces.

Abstract: A running-linked sound producing device produces a running-linked sound according to a running state of a vehicle. The running-linked sound producing device includes a vehicle speed estimation unit to estimate a vehicle speed of the vehicle, an accelerator command value estimation unit to estimate an accelerator command value based on a vehicle speed estimated by the vehicle speed estimation unit, and a running-linked sound generation unit that generates a running-linked sound, wherein the running-linked sound generation unit generates a running-linked sound based on a vehicle speed estimated by the vehicle speed estimation unit and an accelerator command value estimated by the accelerator command value estimation unit.

Abstract: The control apparatus includes a transient-state ignition-timing correction unit in which, in order to set a change in ignition timing made coincident with a change in an internal EGR temperature and also made coincident with the strength of the transient when the transient operating state occurs, an ignition-timing correction-coefficient during the transient operating state and after the transient operating state is calculated in accordance with an internal EGR temperature discrepancy-degree derived from the internal EGR temperature and a steady-state exhaust-gas temperature, and with transient strength derived from a magnitude of change in the operating state and an elapse time since the transient operating state has started, and the ignition timing is corrected by a transient-state ignition-timing correction-coefficient.

Abstract: A method of manufacturing a laser diode array capable of inhibiting electric cross talk is provided. The method of manufacturing a laser diode array includes a processing step of forming a peel layer containing an oxidizable material and a vertical resonator structure over a first substrate sequentially from the first substrate side by crystal growth, and then selectively etching the peel layer and the vertical resonator structure to the first substrate, thereby processing into a columnar shape, a peeling step of oxidizing the peel layer from a side face, and then peeling the vertical resonator structure of columnar shape from the first substrate, and a rearrangement step of jointing a plurality of vertical resonator structures of columnar shape obtained by the peeling step to a surface of a metal layer of a second substrate formed with the metal layer on the surface.