# US 2014/0360184 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 2014/0360184 A1 - Document ID: US20140360184A1 - Status: Published application - Kind: A1 - Application number: 14/053,546 - 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; Amey Y. Karnik; Jeffrey Allen Doering; Brad Alan Boyer - Web page: https://patentgrep.com/patent/US20140360184A1 ## 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, during a first cold or hot start condition, starting the engine with a scroll valve coupled to an outer scroll of an exhaust turbine more closed; and during a second, different cold or start condition, starting the engine with the scroll valve more open. ### Claim 2 (depends on 1) The method of claim 1, wherein the first start condition includes a turbine speed being outside a threshold range, and wherein the second start condition includes the turbine speed being inside the threshold range. ### Claim 3 (depends on 2) The method of claim 2, wherein during the first start condition, the engine is started with the scroll valve more closed for a first, larger number of combustion events since engine start, and wherein during the second start condition, the engine is started with the scroll valve more open for a second, smaller number of combustion events since engine start. ### Claim 4 (depends on 2) The method of claim 2, wherein the threshold range is based on one or more of manifold pressure, airflow, engine speed, estimated or measured exhaust gas temperature and spark timing. ### Claim 5 (depends on 1) The method of claim 1, wherein the first start condition includes an engine start with no indication of turbocharger resonance, and wherein the second start condition includes an engine start with an indication of turbocharger resonance. ### Claim 6 (depends on 1) The method of claim 1, wherein during each of the first and second start conditions, an opening of an exhaust turbine wastegate is adjusted based on the opening of the scroll valve. ### Claim 7 A method for a boosted engine, comprising: during selected engine start conditions, starting the engine with a scroll valve coupled to an outer scroll of an exhaust turbine open. ### Claim 8 (depends on 7) The method of claim 7, wherein the selected engine start conditions include an engine start where the turbine speed is within a threshold range, the threshold range based on turbine resonance. ### Claim 9 (depends on 8) The method of claim 8, wherein an opening of the scroll valve is adjusted based on each of the turbine speed and an exhaust temperature. ### Claim 10 (depends on 9) The method of claim 9, further comprising, opening a wastegate coupled across the exhaust turbine. ### Claim 11 (depends on 10) The method of claim 10, wherein an order of opening the wastegate and the scroll valve is based on an authority of the wastegate relative to the scroll valve at given engine operating conditions. ### Claim 12 (depends on 10) The method of claim 10, maintaining each of the scroll valve and wastegate open until the turbine speed is outside of the threshold range, the method further comprising, after the turbine speed is outside of the threshold range, adjusting a position of each of the scroll valve and the wastegate based on exhaust temperature. ### Claim 13 (depends on 7) The method of claim 7, further comprising, adjusting one or more of EGR, VCT, spark timing, and intake throttle position during the engine start based on the opening of the scroll valve. ### Claim 14 (depends on 7) The method of claim 7, wherein starting the engine with the scroll valve open includes moving the scroll valve to a fully open position at the engine start, a timing of moving the scroll valve based on a transmission event during the engine start. ### Claim 15 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; and a controller with computer readable instructions for, during an engine start condition, when turbine speed is lower than a threshold, starting the engine with an opening of the scroll valve increased based on the turbine speed. ### Claim 16 (depends on 15) The system of claim 15, wherein the controller includes further instructions for, during the engine start condition, after turbine speed is higher than the threshold, decreasing the opening of the scroll valve based on exhaust temperature. ### Claim 17 (depends on 15) The system of claim 15, wherein the controller includes further instructions for sequentially opening the scroll valve and the wastegate, an order of the sequential opening based on a relative authority of the wastegate and the scroll valve. ### Claim 18 (depends on 15) The system of claim 15, wherein the controller includes further instructions for adjusting one or more of EGR, VCT, spark timing, and throttle position while adjusting the scroll valve. ### Claim 19 (depends on 15) The system of claim 15, wherein the controller includes further instructions for, during an engine start condition, when turbine speed is higher than the threshold, starting the engine with the with an opening of the scroll valve decreased based on exhaust temperature. ### Claim 20 (depends on 15) The system of claim 15, wherein starting the engine with an opening of the scroll valve increased includes adjusting a timing of increasing the opening of the scroll valve based on a transmission event so that the opening of the scroll valve at least partially overlaps the transmission event.