US 2017/0370278 A1Published application

Turbocharger turbine stage valves controlled by a single actuator

AssigneeBorgWarner Inc.

InventorsMichael E. MCGAHEY, Brent CHAMBERLAIN, Mark VENTIMIGLIA

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Abstract

A turbocharger (1) including a twin scroll turbine and a valve assembly (40, 140) disposed in the exhaust gas inlet (24, 124) that is configured to control the flow exhaust gas through the turbine. The valve assembly (40, 140) includes two rotary valves (60, 160, 80, 180) actuated by a common valve shaft (44, 144). One of the valves (60, 180) may control exhaust gas flow to a volute or between volutes, and the other (80, 160) may control wastegate exhaust gas flow. The valve shaft (44, 144) is driven by an actuator to rotate about the valve shaft rotational axis (46, 146) such that the first valve (60, 160) and the second valve (80, 180) can each be selectively moved between a closed position and an open position, and the time sequence order of opening of the first valve (60, 160) and the second valve (80, 180) is selectable.

Claims11

Dependent claims

A turbocharger (1) configured to be connected to an engine, the turbocharger (1) comprising a turbine section (20, 20′) including

a turbine wheel (30);
a turbine housing (22) that encloses the turbine wheel (30) and defines
an exhaust gas inlet (24, 124),
an exhaust gas outlet (28),
a first turbine volute (26a) extending between the exhaust gas inlet (24, 124) and the turbine wheel (30),
a second turbine volute (26b) extending between the exhaust gas inlet (24, 124) and the turbine wheel (30), the first and second turbine volutes (26a, 26b) separated by a dividing wall (34),
a bypass passage (56, 156) that permits communication between the exhaust gas inlet (124) and the exhaust gas outlet (28) and bypasses the turbine wheel (30),
a first valve (60, 180) configured to control flow through a first port (50, 152) that permits communication between the exhaust gas inlet (124) and the second turbine volute (26b);
a second valve (80, 160) configured to control flow through a second port (54, 153) that that permits communication between the exhaust gas inlet (124) and the bypass passage (156);
a valve shaft (44, 144) including a rotational axis (46, 146), the valve shaft (44, 144) connected to both the first valve (60, 180) and the second valve (80, 160),
wherein the valve shaft (44, 144) is driven by an actuator to rotate about the rotational axis (46, 146), such that
when the first valve (60) and the second valve (80) are in a closed position, all gas flowing through the exhaust gas inlet (24, 124) is directed to the first turbine volute (26a);
when the first valve (60) is in an open position and the second valve (80) is in closed position, gas flowing through the exhaust gas inlet (24, 124) is directed to the first turbine volute (26a) and the second turbine volute (26b);
and
when the first valve (60) is in an open position and the second valve (80) is in an open position, gas flowing through the exhaust gas inlet (24, 124) is directed to the first turbine volute (26a), and the second turbine volute (26b), and the bypass passage (56, 156).

12 more elements

A turbocharger (1) configured to be connected to an engine, the turbocharger (1) comprising

a turbine section (20′) including
a turbine wheel (30);
a turbine housing (122) that encloses the turbine wheel (30) and defines
an exhaust gas inlet (124),
an exhaust gas outlet (28),
a first turbine volute (26a) disposed between the exhaust gas inlet (124) and the turbine wheel (30),
a second turbine volute (26b) disposed between the exhaust gas inlet (124) and the turbine wheel (30), the first and second turbine volutes (26a, 26b) separated by a dividing wall (34),
the exhaust gas inlet (124) including
an inlet flange (125) including a first flange opening (127a) and a second flange opening (127b),
a first passage (124a) that extends between the first flange opening (127a) and the first turbine volute (26a),
a second passage (124b) that extends between the second flange opening (127b) and the second turbine volute (26b),
a valve housing (142) disposed in the exhaust gas inlet (124) between the inlet flange (125) and the first and second turbine volutes (26a, 26b), the valve housing (142) including
a connecting chamber (158) having a first connecting port (151) that communicates with the first passage (124a) and a second connecting port (152) that communicates with the second passage (124b),
a wastegate chamber (159) having a first wastegate port (153) that communicates with the first passage (124a) and a second wastegate port (154) that communicates with the second passage (124b),
a first valve (180) configured to control flow through the first connecting port (151) and the second connecting port (152),
a second valve (160) configured to control flow through the first wastegate port (153) and the second wastegate port (154), and
a valve shaft (144) including a rotational axis (146), the valve shaft (144) connected to both the first valve (180) and the second valve (160),
wherein the valve shaft (144) is driven by an actuator to rotate about the rotational axis (146) such that
the first valve (180) and the second valve (160) can each be selectively moved between a closed position and an open position, and
the time sequence order of opening of the first valve (180) and the second valve (160) is selectable.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/533,474Filed 8 Dec 2015
Priority: 12 Dec 2014
Published: 28 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F02B 37/025
Gas passages between engine outlet and pump drive, e.g. reservoirs: multiple scrolls or multiple gas passages guiding the gas to the pump drive
F02B 37/183
By bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere: arrangements of bypass valves or actuators therefor
F16K 3/085
With circular plates rotatable around their centres: the axis of supply passage and the axis of discharge passage being coaxial and parallel to…
Y02T 10/12
Internal combustion engine [ICE] based vehicles: improving ICE efficiencies