Engine system including pivoting vane turbocharger having vane(s) that are adjustable to one position while other vane(s) of the turbocharger are adjusted to another position

An engine system comprising:

• an engine including a first bank of cylinders and a second bank of cylinders;
• and
• a turbine assembly including:
• a turbine casing defining a center chamber, a first volute configured to receive exhaust gas from the first bank of cylinders and to transport the exhaust gas to the center chamber, and a second volute configured to receive exhaust gas from the second bank of cylinders and to transport the exhaust gas to the center chamber;
• a turbine wheel disposed within the center chamber and rotatably coupled to the turbine casing;
• a driving ring extending around a periphery of the center chamber and rotatably coupled to the turbine casing;
• a plurality of vanes disposed within the center chamber, the plurality of vanes including a first set of vanes configured to adjust a flow rate of exhaust gas from the first volute to the turbine wheel and a second set of vanes configured to adjust a flow rate of exhaust gas from the second volute to the turbine wheel;
• and
• a plurality of link plates pivotally coupling the plurality of vanes to the driving ring, the plurality of link plates including a first set of link plates configured to pivot the first set of vanes to a first vane position and a second set of link plates configured to pivot the second set of vanes to a second vane position when the first set of vanes is pivoted to the first vane position, wherein the second vane position is different than the first vane position, and wherein each link plate in the first set of link plates has a first length and each link plate in the second set of link plates has a second length that is different than the first length.

A turbine assembly comprising:

• a turbine casing defining a center chamber and at least one volute configured to receive exhaust gas and to transport the exhaust gas to the center chamber;
• a turbine wheel disposed within the center chamber and coupled to the turbine casing in a manner that allows the turbine wheel to rotate about a rotational axis;
• a driving ring extending around a periphery of the center chamber and coupled to the turbine casing in a manner that allows the driving ring to rotate about the rotational axis independent of rotation of the turbine wheel about the rotational axis;
• a plurality of vanes disposed within the center chamber and configured to adjust a flow rate of exhaust gas from the at least one volute to the turbine wheel, the plurality of vanes including a first vane and a second vane;
• and
• a plurality of link plates pivotally coupling the plurality of vanes to the driving ring in a manner that causes the plurality of vanes to pivot about a pivot axis when the driving ring rotates about the rotational axis, the plurality of link plates including a first link plate configured to pivot the first vane about its pivot axis through a first angle when the driving ring is rotated by a first amount and a second link plate configured to pivot the second vane about its pivot axis through a second angle when the driving ring is rotated by the first amount, wherein the second angle is different than the first angle.