Abstract: An object of the present invention is to provide an exhaust system component having excellent properties to be located in an exhaust flow path from an internal combustion engine, particularly, an exhaust system component having an extended use-life. The exhaust system component of the present invention for an internal combustion engine has a self-healing ceramic material and an electric heater for heating the self-healing ceramic material. In particular, the exhaust system component of the present invention is an oxygen sensor having a detection element and an electric heater, wherein the detection element has a solid electrolyte layer, a reference-side electrode layer, an exhaust-side electrode layer, and a diffusion layer and/or a trap layer each composed of a self-healing ceramic material.

Abstract: A control apparatus is provided for an internal combustion engine that includes a turbosupercharger, an electric supercharger, and a waste gate valve configured to open and close an exhaust bypass passage. In a single-supercharging range in which an engine torque is less than a torque boundary value TQ2, a WGV opening degree is controlled so as to decrease accompanying an increase in the engine torque. Further, in a twin-supercharging range in which the engine torque is equal to or greater than the torque boundary value TQ2, the WGV opening degree is controlled so as to increase accompanying an increase in the engine torque, and the electric motor 24b is actuated for supercharging.

Abstract: A compressor includes an impeller, a housing, and a connecting shaft. An inlet for introducing gas into a suction side of the impeller, and an annular groove formed in an outer periphery of the inlet are formed in the housing. The groove communicates with the inlet on the intake passage side. The groove is blocked on the impeller side. A gas outlet of an EGR passage is connected with a middle of the groove. An inner diameter of the groove is machined to be larger than an inner diameter of an end part of the gas outlet of the intake passage (an end part on the inlet side).

Abstract: The object of the invention is to provide a cooling device for accomplishing both of required engine and compressor cooling degrees. The invention relates to a cooling device for an engine provided with a blowby gas recirculation device (50) and a turbocharger (60), the blowby gas recirculation device recirculating a blowby gas to an intake passage upstream of a compressor of the turbocharger. The cooling device comprises a first cooling device (70) for cooling a body (20) of the engine and a second cooling device (80) for cooling an intake air, separately. The second cooling device cools the compressor (61).

Abstract: A control apparatus is applied to an internal combustion engine. The internal combustion engine includes a turbocharger; an exhaust gas purifying catalyst which is arranged at a section downstream of a turbine in the exhaust passage; and a low pressure EGR passage which connects a section downstream of the exhaust gas purifying device in the exhaust passage and a section upstream of a compressor in the intake passage. The compressor is provided with a movable vane mechanism capable of varying throttled quantity of a flow passage of intake gas by moving diffuser vanes. The control apparatus controls the movable vane mechanism so that the throttled quantity of the flow passage is decreased when the exhaust gas is led to the compressor via the low pressure EGR passage as compared with a case when the exhaust gas is not led to the compressor.

Abstract: A compressor has a hub-side wall of a hub-side wall plate, a shroud-side wall that faces the hub-side wall and forms a diffuser path between the shroud-side wall and the hub-side wall, vanes that protrude from the hub-side wall plate into the diffuser path, and an actuator capable of changing the distance between the vanes and the shroud-side wall in accordance with a flow rate of air in the diffuser path. Adjacent ones of the adjacent vanes do not overlap with each other when viewed from a center axis of the compressor. When the actuator maximizes the distance between the vanes and the shroud-side wall, the distance between the vanes and the shroud-side wall is smaller than the distance between the hub-side wall and areas of the shroud-side wall that face the vanes.

Abstract: A turbine housing (3) applied to a turbine (2) incorporated in a turbocharger (1) includes a main body (10) in which a wheel housing chamber (13) housing a turbine wheel (4) and an exhaust passage (15) are provided. The exhaust passage (15) has one end communicating with an outlet of the wheel housing chamber (13) and the other end providing an exhaust port (15a). The main body (10) is provided with an upstream-side inner pipe (20) and a downstream-side inner pipe (21) therein. The upstream-side inner pipe has a shroud portion (20) which is located in the wheel housing chamber (13) and extends along edges of turbine blades (5) of the turbine wheel (4). The downstream-side inner pipe (21) is arranged in the exhaust passage (15) so as to be located on a downstream side of the upstream-side inner pipe (20). A thickness (t2) of the downstream-side inner pipe (21) is thinner than a thickness (t1) of the upstream-side inner pipe (20).

Abstract: A compressor including a housing assembly that includes a bearing housing and a compressor housing, and a movable vane. In the housing assembly, a diffuser is formed by a first diffuser wall portion and a second diffuser wall portion. The movable vane includes a base portion and vane portions. The movable vane is movable between a projected position where a facing surface of the base portion contacts with a positioning surface provided in a storage chamber and a retracted position. The compressor housing includes an affixing portion projecting further than the second diffuser wall portion, and a fastening surface being, provided, to the affixing portion. The compressor housing is assembled with the bearing housing by attaching the fastening surface to a mounting surface of the bearing housing. The positioning surface is provided in the storage chamber so as to be flush with the fastening surface.

Abstract: A turbine housing (3) applied to a turbine (2) incorporated in a turbocharger (1) includes a main body (10) in which a wheel housing chamber (13) housing a turbine wheel (4) and an exhaust passage (15) are provided. The exhaust passage (15) has one end communicating with an outlet of the wheel housing chamber (13) and the other end providing an exhaust port (15a). The main body (10) is provided with an upstream-side inner pipe (20) and a downstream-side inner pipe (21) therein. The upstream-side inner pipe has a shroud portion (20) which is located in the wheel housing chamber (13) and extends along edges of turbine blades (5) of the turbine wheel (4). The downstream-side inner pipe (21) is arranged in the exhaust passage (15) so as to be located on a downstream side of the upstream-side inner pipe (20). A thickness (t2) of the downstream-side inner pipe (21) is thinner than a thickness (t1) of the upstream-side inner pipe (20).

Abstract: A compressor has a hub-side wall of a hub-side wall plate, a shroud-side wall that faces the hub-side wall and forms a diffuser path between the shroud-side wall and the hub-side wall, vanes that protrude from the hub-side wall plate into the diffuser path, and an actuator capable of changing the distance between the vanes and the shroud-side wall in accordance with a flow rate of air in the diffuser path. Adjacent ones of the adjacent vanes do not overlap with each other when viewed from a center axis of the compressor. When the actuator maximizes the distance between the vanes and the shroud-side wall, the distance between the vanes and the shroud-side wall is smaller than the distance between the hub-side wall and areas of the shroud-side wall that face the vanes.

Abstract: Disclosed is a bearing unit for a turbocharger including a rotary shaft at one end of which and the other end of which a turbine wheel and an impeller respectively are provided, and of which on the turbine-wheel side is formed a large-diameter turbine-side step, the rotary shaft being supported between the turbine-side step and the impeller such that the rotary shaft is freely rotatable, the bearing unit comprises a turbine-side ball bearing in which balls are located on the turbine-wheel side, an impeller-side ball bearing positioned such that balls are located on the impeller side, and a positioning step configured to restrict movement of the inner race of the turbine-side ball bearing toward the turbine wheel and to position the turbine-side ball bearing such that the end of the inner race is separated from the turbine side step.

Abstract: A diffuser apparatus includes a diffuser communicating radially outwardly with an exit of an impellor. The apparatus includes a housing with a plate that is rotatable about a rotational axis and forms a hub side wall. A side surface of the plate has a vane having one circumferential end fixed to the plate; the other end is movable in the direction of the axis. The housing includes an inclination path with one end opened to the hub side wall to bendably guide the vane so that the other end of the vane moves in the circumferential direction upon rotation of the plate and moves in the direction of the axis to a projected position to project into the diffuser. An actuator rotates the plate to drive the vane between the projected position and a retracted position where the other end is retracted into the hub side wall.

Abstract: A control apparatus for an internal combustion engine includes a turbocharger; an exhaust gas purifying catalyst which is arranged at a section downstream of a turbine in the exhaust passage; and a low pressure EGR passage which connects a section downstream of the exhaust gas purifying device in the exhaust passage and a section upstream of a compressor in the intake passage. The compressor is provided with a movable vane mechanism capable of varying throttled quantity of a flow passage of intake gas by moving diffuser vanes. The movable vane mechanism is controlled so that the throttled quantity of the flow passage is decreased when the exhaust gas is led to the compressor via the low pressure EGR passage as compared with a case when the exhaust gas is not led to the compressor.

Abstract: A compressor (2) comprises: a housing assembly (3) that includes a bearing housing (9) and a compressor housing (10), wherein a diffuser (6) is formed by a first diffuser wall portion (12) and a second diffuser wall portion (13) on outer periphery of an impeller (4), and a movable vane (15) that includes a base portion (17) which is arranged in a storage chamber (21) provided in the first diffuser wall portion (12) and has a facing surface (17a), and vane portions (18) which project from the facing surface (17a), wherein the movable vane (15) is movable between a projected position where the facing surface (17a) contacts with a positioning surface (20a) provided in the storage chamber (21) and the vane portions (18) project in the diffuser (6) and a retracted position where the vane portions (18) are housed in the storage chamber (21), wherein the bearing housing (9) is provided with a mounting surface (9a) located in a direction perpendicular to the direction of the axis (Ax), the compressor housing (10) inc

Abstract: An exhaust gas recirculation system includes: a turbocharger (8) that includes a compressor (8a) and a turbine (8b); a throttle valve (7), provided in an intake passage (3) upstream of the compressor (8a); an EGR passage (11) through which a portion of exhaust gas from the exhaust passage (4) is recirculated to the intake passage (3) between the throttle valve (7) and the compressor (8a); and an EGR valve (13) that regulates a flow rate of exhaust flowing in the EGR passage (11). The exhaust gas recirculation system further includes valve control means that controls the opening degree of the throttle valve (7) and the opening degree of the EGR valve (13) so that the pressure in the intake passage (3) between the throttle valve (7) and the compressor (8a) is maintained at or above a predetermined pressure.

Abstract: Disclosed is a bearing unit for a turbocharger including a rotary shaft at one end of which and the other end of which a turbine wheel and an impeller respectively are provided, and of which on the turbine-wheel side is formed a large-diameter turbine-side step, the rotary shaft being supported between the turbine-side step and the impeller such that the rotary shaft is freely rotatable, the bearing unit comprises a turbine-side ball bearing in which balls are located on the turbine-wheel side, an impeller-side ball bearing positioned such that balls are located on the impeller side, and a positioning step configured to restrict movement of the inner race of the turbine-side ball bearing toward the turbine wheel and to position the turbine-side ball bearing such that the end of the inner race is separated from the turbine side step.

Abstract: A diffuser apparatus which includes a diffuser provided as a passage space communicated with the exit side of an impellor radially outwardly of the impellor of a centrifugal compressor, the apparatus including a housing portion which houses a rotational plate therein so as to be rotatable about a rotational axis and forms a hub side wall portion, wherein the side surface of the rotational plate on the diffuser side is provided with a vane having one end in the circumferential direction fixed to the rotational plate, the other end in the circumferential direction movable in the direction of the axis, and flexibility, the housing portion is provided with an inclination path which has one end opened to the portion which forms the hub side wall portion, and bendably guides the vane so that the other end of the vane is moved in the circumferential direction with the rotation of the rotational plate and is moved in the direction of the axis so as to be projected into the diffuser, and an actuator rotates the rotati

Abstract: A control apparatus applied to an internal combustion engine including a turbocharger in which a movable vane mechanism capable of varying throttled quantity of a passage of intake air discharged from a compressor wheel by varying a position of vanes is disposed to a compressor, a low-pressure EGR passage to connect an exhaust passage and a section of the intake passage at the upstream side from the compressor, and a low-pressure EGR valve to open and close the EGR passage, wherein it is determined whether or not the vanes are locked and the low-pressure EGR valve is controlled toward an opened side so as to increase exhaust gas quantity to be recirculated to the intake passage via the low-pressure EGR passage while switching an operating state of the internal combustion engine to an emergency operating state in which output power of the internal combustion engine is restricted when the vanes are determined as being locked.

Abstract: The purpose of the present invention is providing a supercharging system which uses both of a mechanism such as VN or the like and an electric motor generating an assist force while making the supercharger operate smoothly when the assist by the electric motor is stopped. The system controls the electric motor in a feedback manner so that enough assist force is generated (FIG. 2A and FIG. 2B) while controlling the VN in an open manner (FIG. 2D) until status of the supercharger reaches target status (time t1) when an accelerator requirement arises in a low revolution region. The control of the electric motor is changed to an open control, and the control of the VN is changed to a feedback control, respectively, at time t1. The open control of the electric motor is continued so that necessary complement torque occurs until time t2. After time t2, the system maintains the target status only by the feedback control of the VN.

Abstract: An engine comprises an intake control valve disposed in an intake passage at an upstream side of an intake valve in each cylinder for individually opening/closing the intake passage, an actuator for opening/closing the intake control valve, and a control device for controlling an operation of the actuator, wherein the control device controls the actuator to delay opening of the intake control valve in relation to opening of the intake valve, thus performing the supercharge. Supercharge correction is further performed for correcting operating timing of the actuator so that unbalance in a supercharge air quantity between the cylinders in the engine is suppressed.