Method and system for binary flow turbine control

An engine system, comprising:

• an engine having cylinders coupled to an exhaust manifold;
• a direct injector coupled in each cylinder;
• a turbocharger for providing a boosted aircharge to the engine, the turbocharger including an intake compressor and an exhaust turbine, the exhaust turbine including a first outer scroll and a second inner scroll coupled with the exhaust manifold;
• a scroll valve coupled between the exhaust manifold and an inlet of the first outer scroll;
• a transmission including a clutch;
• and
• a controller with computer readable instructions in memory for,
• transitioning an opening of the scroll valve responsive to engine operating conditions;
• timing the transitioning based on a shift schedule of the transmission;
• and
• adjusting slippage of the clutch during the transitioning.

A method for controlling an engine, comprising:

• direct injecting fuel to cylinders of the engine;
• transitioning, by adjusting an actuator via a controller with a memory, a restriction in exhaust upstream of only a first scroll and not a second scroll of a multi-scroll exhaust turbine based on an indication of operating conditions from one or more sensors, wherein the first and second scrolls are coupled to a common exhaust manifold coupled to each cylinder of the engine;
• and
• adjusting a timing of the transitioning via the controller based on an upcoming transmission shift event.