A turbocharger includes a turbine wheel rotatable about an axis and a turbine housing disposed about the turbine wheel. The turbine housing has an inlet portion defining a turbine housing inlet and has a volute portion defining a turbine housing interior. The volute portion has a first volute wall, a second volute wall spaced from the first volute wall, and a tongue separating the turbine housing inlet and the turbine housing interior. The tongue has a first tongue portion extending from the first volute wall substantially toward the second volute wall along the axis, a second tongue portion extending from the first tongue portion substantially circumferentially about the axis, and a third tongue portion extending from the second tongue portion substantially toward the second volute wall along the axis to reduce high cycle fatigue of the turbine wheel.

A controller for a motor vehicle having an internal combustion engine, and a device for detecting a fire in a fluid conduit, the device having a fluid state sensor for detecting a state variable of a fluid that is conducted in the fluid conduit, are provided. The determination of a fire situation is performed in a manner dependent on a signal of the fluid state sensor.

A mixed-flow turbine wheel includes: a plurality of rotor blades disposed on a circumferential surface of the hub at intervals in a circumferential direction and configured such that each of the plurality of rotor blades has a leading edge which includes, in a meridional view, an oblique edge portion where a distance between the leading edge and an axis of the rotational shaft decreases from a tip side toward a hub side, and a sensor detection surface having a flat shape and being applied with a marking which is detectable by an optical sensor device. The sensor detection surface is formed on at least one of the circumferential surface of the hub or an edge portion of a reference rotor blade being one of the plurality of rotor blades, such that, in the meridional view, a trailing-edge side angle of two angles formed between the axis of the rotational shaft and a normal of the sensor detection surface is smaller than a trailing-edge side angle of two angles formed between the axis of the rotational shaft and a normal of the oblique edge portion.

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.

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.

An aspect of the present disclosure provides a diagnosis device for an internal combustion engine. The internal combustion engine 1 includes a variable geometry type turbocharger 14, and the turbocharger includes a variable vane 28, a link mechanism configured to operate the variable vane, and an actuator 29 configured to drive the link mechanism. The diagnosis device includes a control unit 100 configured to control an opening degree of the variable vane by controlling the actuator. The control unit determines that an abnormality has occurred in the link mechanism of the turbocharger when an operating time of the internal combustion engine in a predetermined operating region exceeds a predetermined upper limit value and a differential pressure between a target boost pressure determined according to an operating state of the internal combustion engine and an actual boost pressure exceeds a predetermined upper limit value.

An exhaust-gas turbocharger (1) with a compressor wheel (2); with a turbine wheel (3); and with a shaft (4) on which the compressor wheel (2) and the turbine wheel (3) are arranged in a rotationally secured manner. The turbine wheel (3) has a through-opening (5) in which a first end region (6) of the shaft (4) is arranged, and the turbine wheel (3) is braced between an end-side stop (7) connected to the end region (6) and a compressor wheel-side shaft sleeve (8) fixed on the shaft (4).

An exhaust-gas turbocharger (1) with a compressor wheel (2); with a turbine wheel (3); and with a shaft (4) on which the compressor wheel (2) and the turbine wheel (3) are arranged in a rotationally secured manner. The turbine wheel (3) has a through-opening (5) in which a first end region (6) of the shaft (4) is arranged, and the turbine wheel (3) is braced between an end-side stop (7) connected to the end region (6) and a compressor wheel-side shaft sleeve (8) fixed on the shaft (4).

Disclosed is an intake joint structure capable of blocking backflow of lubricating oil 18 at a connection position between an air inlet 12 of a turbocharger and a suction pipe 24. A backflow-preventive plate 25 is integrally molded to have a cylindrical portion 25a fitted over the air inlet 12 and a tapered portion 25b curved inward from an upstream end of the cylindrical portion 25a and converged downstream to provide an open end. A downstream end 24a of a suction pipe 24 is molded by soft material over a predetermined range using exchange blow molding. The cylindrical portion 25a of the backflow-preventive plate 25 is fitted over the air inlet 12 through a grommet 26 (first soft layer) and the downstream end 24a of the suction pipe 24 is fitted over the cylindrical portion 25a and is banded by a hose band 27.

The present disclosure relates to dual compression engine boosting systems utilizing both a turbocharger and a supercharger and control systems relating to relative activation and deactivation of the boosting devices. Various Exhaust Gas Recirculation (EGR) configurations are also disclosed for the dual compression engine boosting systems.