# US 2014/0360183 A1 · Method and system for binary flow turbine control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360183 A1 - Document ID: US20140360183A1 - Status: Published application - Kind: A1 - Application number: 14/053,542 - Filed: 2013-10-14 - Published: 2014-12-11 - Earliest claimed: 2013-06-10 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Julia Helen Buckland; Stephen Lee Cooper; Brad Alan Boyer; Amey Y. Karnik; Jeffrey Allen Doering - Web page: https://patentgrep.com/patent/US20140360183A1 ## CPC - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - F02B 37/02: Gas passages between engine outlet and pump drive, e.g. reservoirs - F02B 37/025: {Multiple scrolls or multiple gas passages guiding the gas to the pump drive} - F02B 37/12: Control of the pumps - F02B 37/18: by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere} - F02B 37/22: by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) - F02D 13/02: during engine operation - F02D 13/0215: {changing the valve timing only} - F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)} - F02D 41/005: {according to engine operating conditions} - F02D 41/0052: {Feedback control of engine parameters, e.g. for control of air/fuel ratio or intake air amount} - F02D 41/022: {in relation with the clutch status} - F02D 41/023: {in relation with the gear ratio shifting (conjoint control for improving gear change B60W30/19)} - F02D 41/04: Introducing corrections for particular operating conditions (F02D41/14 takes precedence) - F02D 41/062: {for starting (F02D41/061 takes precedence)} - F02M 26/01: Internal exhaust gas recirculation, i.e. wherein the residual exhaust gases are trapped in the cylinder or pushed back from the intake or the exhaust manifold into the combustion chamber without the use of additional passages - F02M 26/04: with a single turbocharger - F02M 26/05: High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor - F02M 26/06: Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor - F02M 26/07: Mixed pressure loops, i.e. wherein recirculated exhaust gas is either taken out upstream of the turbine and reintroduced upstream of the compressor, or is taken out downstream of the turbine and reintroduced downstream of the compressor - F02P 5/04: automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions (dependent on position of personal controls of engine F02P5/02) - F02P 5/045: {combined with electronic control of other engine functions, e.g. fuel injection (in general F02D37/02)} - F02D 2041/001: {for engines with variable valve actuation} - F02D 2200/0404: Throttle position - F02D 2200/1002: Output torque - Y02T 10/12: Improving ICE efficiencies - Y02T 10/40: Engine management systems - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## 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. ## Claims ### Claim 1 A method for an engine, comprising: in response to a tip-in, adjusting an opening of a scroll valve coupled to an outer scroll of a multi-scroll exhaust turbine to reduce turbo lag; and adjusting an amount of exhaust gas recirculated to an engine intake based on the scroll valve opening. ### Claim 2 (depends on 1) The method of claim 1, wherein adjusting the opening of the scroll valve includes reducing the opening of the scroll valve, the reducing based on an estimated or measured turbine speed or boost pressure at the tip-in. ### Claim 3 (depends on 2) The method of claim 2, wherein the reducing based on the turbine speed includes, as a difference between an estimated or measured turbine speed and a requested turbine speed increases, moving the scroll valve towards a fully closed position, and wherein the reducing based on the boost pressure includes, as a difference between an estimated or measured boost pressure and a requested boost pressure increases, moving the scroll valve towards the fully closed position. ### Claim 4 (depends on 3) The method of claim 3, wherein the adjusting is further based on an ambient air density, the scroll valve moved towards the fully closed position as ambient air density decreases. ### Claim 5 (depends on 3) The method of claim 3, wherein adjusting the amount of exhaust gas recirculated to the engine intake includes, reducing an amount of EGR as the scroll valve moves towards the fully closed position. ### Claim 6 (depends on 5) The method of claim 5, further comprising, adjusting an opening of a wastegate coupled across the exhaust turbine in response to the tip-in, the wastegate opening based on the scroll valve opening, the wastegate moved towards a fully closed position as the scroll valve is moved towards the fully closed position. ### Claim 7 (depends on 6) The method of claim 6, wherein a timing of the wastegate adjustment is based on a timing of the scroll valve adjustment and further based on an authority of the wastegate relative to the authority of the scroll valve. ### Claim 8 (depends on 7) The method of claim 7, wherein the wastegate adjustment follows the scroll valve adjustment when the wastegate has a lower authority, and wherein the wastegate adjustment follows or is concurrent with the scroll valve adjustment when the wastegate has higher authority. ### Claim 9 (depends on 7) The method of claim 7, wherein a timing of the scroll valve adjustment is based on a transmission event following the tip-in. ### Claim 10 (depends on 2) The method of claim 2, wherein reducing the opening of the scroll valve includes reducing the opening until the turbine speed is at or above a threshold speed, the method further comprising, after the turbine speed is at or above the threshold speed, opening the scroll valve. ### Claim 11 (depends on 10) The method of claim 10, wherein reducing the opening of the scroll valve includes fully closing the scroll valve. ### Claim 12 A method for an engine, comprising: in response to a tip-in, closing a scroll valve coupled to an outer scroll of a multi-scroll turbine while reducing an amount of EGR delivered to the engine for a duration. ### Claim 13 (depends on 12) The method of claim 12, wherein the duration is based on turbine speed following the tip-in, the duration increased as the turbine speed following the tip-in decreases. ### Claim 14 (depends on 12) The method of claim 12, wherein the closing for a duration includes closing until a measured or estimated turbine speed is at or above a threshold speed relative to requested turbine speed. ### Claim 15 (depends on 12) The method of claim 12, further comprising, after the duration has elapsed, opening the scroll valve while maintaining the amount of EGR delivered to the engine. ### Claim 16 (depends on 15) The method of claim 15, wherein closing the scroll valve includes fully closing the scroll valve and wherein opening the scroll valve includes fully opening the scroll valve. ### Claim 17 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 wastegate included in a bypass coupled between an inlet and an outlet of the turbine; an EGR system an LP-EGR valve in an LP-EGR passage for recirculating exhaust gas from downstream of the turbine to upstream of the compressor, and an HP-EGR valve in an HP-EGR passage for recirculating exhaust gas from upstream of the turbine to downstream of the compressor; and a controller with computer readable instructions for, in response to a tip-in, closing the scroll valve until turbine speed is higher than a threshold speed; and adjusting each of the LP-EGR valve and the HP-EGR valve to vary a ratio of HP-EGR to LP-EGR based on the scroll valve closing. ### Claim 18 (depends on 17) The system of claim 17, wherein the controller includes further instructions for closing the wastegate after closing the scroll valve. ### Claim 19 (depends on 17) The system of claim 17, wherein adjusting each of the LP-EGR valve and the HP-EGR valve includes increasing an opening of the LP-EGR valve while decreasing an opening of the HP-EGR valve to increase a ratio of LP-EGR to HP-EGR. ### Claim 20 (depends on 17) The system of claim 17, wherein the controller includes further instructions for, after the turbine speed is higher than the threshold speed, opening the scroll valve and increasing an opening of the HP-EGR valve while decreasing an opening of the LP-EGR valve to increase a ratio of HP-EGR to LP-EGR.