# US 2014/0360185 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 2014/0360185 A1 - Document ID: US20140360185A1 - Status: Published application - Kind: A1 - Application number: 14/053,550 - Filed: 2013-10-14 - Published: 2014-12-11 - Earliest claimed: 2013-06-10 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Brad Alan Boyer; Julia Helen Buckland; Jeffrey Allen Doering; Barbara Westrate; Stephen Lee Cooper; Keith Michael Plagens - Web page: https://patentgrep.com/patent/US20140360185A1 ## 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 an indication of pre-ignition, adjusting a scroll valve coupled to an inlet of outer scroll of a multi-scroll exhaust turbine to a first open position; and in response to an indication of knock without pre-ignition, adjusting the scroll valve to a second open position, the second position less open than the first position. ### Claim 2 (depends on 1) The method of claim 1, wherein the indication of pre-ignition includes a knock sensor output that is higher than a threshold and that is received before a cylinder ignition event and wherein the indication of knock includes a knock sensor output that is higher than the threshold and that is received after the cylinder ignition event. ### Claim 3 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition is based on exhaust manifold pressure, an opening of the scroll valve increased as the exhaust manifold pressure exceeds a threshold pressure. ### Claim 4 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition is based on the intensity or frequency of the pre-ignition, an opening of the scroll valve increased as the intensity or frequency of pre-ignition increases. ### Claim 5 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition is based on one or more of engine speed and ambient humidity, an opening of the scroll valve increased as the engine speed decreases, the opening of the scroll valve increased as the ambient humidity decreases. ### Claim 6 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition is based on ambient air temperature or manifold air temperature, an opening of the scroll valve increased as the air temperature increases ### Claim 7 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition is based on one or more turbine inlet temperature and fuel octane content of fuel delivered to the engine, an opening of the scroll valve increased as the turbine inlet temperature exceeds a threshold temperature, the opening of the scroll valve increased as the fuel octane decreases. ### Claim 8 (depends on 1) The method of claim 1, wherein the adjusting in response to the indication of pre-ignition includes increasing an opening of the scroll valve. ### Claim 9 (depends on 1) The method of claim 1, further comprising, maintaining the scroll valve at the more open position for a duration until an exhaust manifold pressure is below a threshold, and then moving the scroll valve to a more closed position after no further indication of pre-ignition. ### Claim 10 (depends on 1) The method of claim 1, further comprising, in response to the indication of pre-ignition, adjusting a wastegate coupled across the exhaust turbine, the wastegate adjustment based on the scroll valve adjustment, the adjustment including, as the scroll valve is moved to a more open position, moving the wastegate to a more open position. ### Claim 11 (depends on 10) The method of claim 10, further comprising, while adjusting the scroll valve, adjusting one or more of VCT, throttle position, cylinder fueling and EGR, the adjusting based on the scroll valve adjustment. ### Claim 12 A method for a boosted engine, comprising: in response to an indication of pre-ignition, opening a scroll valve coupled to an outer scroll of an exhaust turbine to reduce engine load. ### Claim 13 (depends on 12) The method of claim 12, wherein opening the scroll valve includes fully opening the scroll valve. ### Claim 14 (depends on 12) The method of claim 12, wherein opening the scroll valve includes opening the scroll valve for a duration until an exhaust manifold pressure is below a threshold pressure. ### Claim 15 (depends on 12) The method of claim 12, wherein opening the scroll valve includes opening the scroll valve for a duration until a turbine inlet temperature is below a threshold temperature, the method further comprising, after the turbine inlet temperature is below the threshold temperature, at least partially closing the scroll valve, the scroll valve closing based on turbine speed. ### Claim 16 (depends on 12) The method of claim 12, further comprising, enriching cylinder fuel injection, the enrichment based on the scroll valve opening. ### Claim 17 (depends on 12) The method of claim 12, further comprising, opening a wastegate coupled across the exhaust turbine, the opening of the wastegate based on the opening of the scroll valve, the opening of the wastegate including opening the wastegate while opening the scroll valve during a first pre-ignition condition, and opening the wastegate after opening the scroll valve during a second pre-ignition condition. ### Claim 18 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; a knock sensor coupled to the engine for identifying and differentiating cylinder knock and cylinder pre-ignition; and a controller with computer readable instructions for, indicating cylinder pre-ignition based on an output of the knock sensor; and in response to the indication of pre-ignition, increasing an opening of the scroll valve based on turbine inlet temperature. ### Claim 19 (depends on 18) The system of claim 18, wherein the increasing includes, as the turbine inlet temperature exceeds a threshold, increasing an opening of the scroll valve towards a fully open position, and as the turbine inlet temperature falls below the threshold, decreasing the opening of the scroll valve towards a fully closed position. ### Claim 20 (depends on 19) The system of claim 19, further comprising, adjusting an opening of the wastegate based on the opening of the scroll valve, the wastegate moved to a more open position as the opening of the scroll valve is increased.