Abstract: An e-charger includes an outer housing and a rotor supported for rotation within the outer housing. A motor assembly is housed within the outer housing and includes an electric motor and a motor case. The electric motor is encased within the motor case. The electric motor is configured to drivingly rotate the rotor within the outer housing. Furthermore, the e-charger includes a cooling system configured to receive a coolant. The cooling system includes a manifold passage defined in the outer housing. The cooling system includes a first motor cooling circuit and a second motor cooling circuit that are cooperatively defined by the outer housing and the motor case. The first motor cooling circuit and the second motor cooling circuit are fluidly connected to the manifold passage. The manifold passage is configured to distribute a flow of the coolant between the first motor cooling circuit and the second motor cooling circuit.

Abstract: An e-charger includes an outer housing and a rotor supported for rotation within the outer housing. A motor assembly is housed within the outer housing and includes an electric motor and a motor case. The electric motor is encased within the motor case. The electric motor is configured to drivingly rotate the rotor within the outer housing. Furthermore, the e-charger includes a cooling system configured to receive a coolant. The cooling system includes a manifold passage defined in the outer housing. The cooling system includes a first motor cooling circuit and a second motor cooling circuit that are cooperatively defined by the outer housing and the motor case. The first motor cooling circuit and the second motor cooling circuit are fluidly connected to the manifold passage. The manifold passage is configured to distribute a flow of the coolant between the first motor cooling circuit and the second motor cooling circuit.

Abstract: A turbocharger includes an annular bypass passage with an annular bypass valve disposed therein. The bypass valve includes a fixed annular valve seat and a rotary annular valve member disposed against the valve seat. The valve member is rotatable about the axis for varying a degree of alignment between orifices in the valve seat and valve member so as to form flow passages having a flow area A for exhaust gas. The orifices are shaped to provide a first phase of evolution of the flow area A from zero up to a value A1 and then a second phase of evolution from the value A1 up to a value A2, and such that the first and second phases have distinctly different slopes on a curve of flow area versus rotational position of the valve member, with a distinct break point in the curve between the first and second phases.

Abstract: A turbocharger includes an annular bypass passage with an annular bypass valve disposed therein. The bypass valve includes a fixed annular valve seat and a rotary annular valve member disposed against the valve seat. The valve member is rotatable about the axis for varying a degree of alignment between orifices in the valve seat and valve member so as to form flow passages having a flow area A for exhaust gas. The orifices are shaped to provide a first phase of evolution of the flow area A from zero up to a value A1 and then a second phase of evolution from the value A1 up to a value A2, and such that the first and second phases have distinctly different slopes on a curve of flow area versus rotational position of the valve member, with a distinct break point in the curve between the first and second phases.

Abstract: A turbocharger for internal combustion engines, having a heat shield disposed between a turbine housing and center housing of the turbocharger for shielding the center housing from exhaust gases passing through the turbine. The heat shield in one embodiment is centered on a generally conical surface of the center housing, by engagement between the conical surface and a centering portion of the heat shield. In another embodiment, the heat shield has a generally conical portion that is non-axisymmetric, having a plurality of radially enlarged lobes that engage a radially inwardly facing surface of the turbine housing for centering the heat shield.

Abstract: A turbocharger having a variable nozzle with stepped two-stage vanes (50), the variable nozzle comprising a tubular piston (70) disposed in the bore (44) of the turbine housing (38) such that the piston (70) is axially slidable adjacent to the vanes (50) that extend across the nozzle. Each vane defines a first vane stage (50a) proximate the free end of the vane, the second vane stage (50b) having a different aerodynamic contour in comparison with the first vane stage (50a), each vane comprising a step (60) transitioning from the first vane stage (50a) to the second vane stage (50b). The piston (70) in a closed position closes the second vane stage (50b) so that exhaust gas flows only through the first vane stage (50a). The second vane stage (50b) is progressively opened as the piston (70) is axially slid toward an open position.

Abstract: A turbocharger for internal combustion engines, having a heat shield disposed between a turbine housing and center housing of the turbocharger for shielding the center housing from exhaust gases passing through the turbine. The heat shield in one embodiment is centered on a generally conical surface of the center housing, by engagement between the conical surface and a centering portion of the heat shield. In another embodiment, the heat shield has a generally conical portion that is non-axisymmetric, having a plurality of radially enlarged lobes that engage a radially inwardly facing surface of the turbine housing for centering the heat shield.

Abstract: A turbocharger for internal combustion engines, having a heat shield disposed between a turbine housing and center housing of the turbocharger for shielding the center housing from exhaust gases passing through the turbine. The heat shield in one embodiment is centered on a generally conical surface of the center housing, by engagement between the conical surface and a centering portion of the heat shield. In another embodiment, the heat shield has a generally conical portion that is non-axisymmetric, having a plurality of radially enlarged lobes that engage a radially inwardly facing surface of the turbine housing for centering the heat shield.

Abstract: A turbocharger for internal combustion engines, having a heat shield disposed between a turbine housing and center housing of the turbocharger for shielding the center housing from exhaust gases passing through the turbine. The heat shield in one embodiment is centered on a generally conical surface of the center housing, by engagement between the conical surface and a centering portion of the heat shield. In another embodiment, the heat shield has a generally conical portion that is non-axisymmetric, having a plurality of radially enlarged lobes that engage a radially inwardly facing surface of the turbine housing for centering the heat shield.

Abstract: A turbocharger having a variable nozzle with stepped two-stage vanes (50), the variable nozzle comprising a tubular piston (70) disposed in the bore (44) of the turbine housing (38) such that the piston (70) is axially slidable adjacent to the vanes (50) that extend across the nozzle. Each vane defines a first vane stage (50a) proximate the free end of the vane, the second vane stage (50b) having a different aerodynamic contour in comparison with the first vane stage (50a), each vane comprising a step (60) transitioning from the first vane stage (50a) to the second vane stage (50b). The piston (70) in a closed position closes the second vane stage (50b) so that exhaust gas flows only through the first vane stage (50a). The second vane stage (50b) is progressively opened as the piston (70) is axially slid toward an open position.