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US 2014/0360179 A1Published application
Method and system for binary flow turbine control
AssigneeFord Global Technologies, LLC
InventorsJeffrey Allen Doering, Amey Y. Karnik, Julia Helen Buckland, Brad Alan Boyer, Stephen Lee Cooper
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Abstract
Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.
Claims22
A method for an engine, comprising:
- transitioning a restriction in exhaust upstream of a first scroll of a multi-scroll exhaust turbine based on operating conditions while adjusting an engine actuator during the transition to maintain engine torque.
A method for an engine, comprising:
- transitioning restriction in exhaust upstream of a first scroll of a multi-scroll exhaust turbine based on operating conditions;
- and
- adjusting a timing of the transitioning based on a transmission event.
An engine system, comprising:
- an engine;
- 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 and a second inner scroll;
- a scroll valve coupled between an engine exhaust manifold an inlet of the first outer scroll;
- a transmission including a clutch;
- and
- a controller with computer readable instructions 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.
7 more elements
Dependencies are inferred from the claim text.