WO2016154650A1 - Verfahren zur regelung des betriebspunktes einer abgasturbine - Google Patents
Verfahren zur regelung des betriebspunktes einer abgasturbine Download PDFInfo
- Publication number
- WO2016154650A1 WO2016154650A1 PCT/AT2016/050080 AT2016050080W WO2016154650A1 WO 2016154650 A1 WO2016154650 A1 WO 2016154650A1 AT 2016050080 W AT2016050080 W AT 2016050080W WO 2016154650 A1 WO2016154650 A1 WO 2016154650A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- pressure
- gas turbine
- flow path
- operating point
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/24—Control of the pumps by using pumps or turbines with adjustable guide vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0406—Intake manifold pressure
- F02D2200/0408—Estimation of intake manifold pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
- F02D41/1448—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure
- F02D41/145—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an exhaust gas pressure with determination means using an estimation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a method for controlling the operating point of an exhaust gas turbine of an internal combustion engine, wherein the exhaust gas turbine has a variable flow geometry and the flow geometry of the exhaust gas turbine is adjusted with a controller over a controlled variable for the operating point.
- the invention further relates to a control unit for carrying out such a method.
- the operating point of an exhaust gas turbocharger with variable turbine geometry (VTG) or flow geometry is set via a desired value for the boost pressure.
- This setpoint is calculated as a function of the load and the speed from a map and corrected or limited ambient conditions (temperature, atmospheric pressure, ...) and temperature in the charge air line.
- ambient conditions temperature, atmospheric pressure, ...) and temperature in the charge air line.
- For a continuous control is a steady connection - without change of sign - between the change of the position of the actuator of the variable turbine geometry and the self-adjusting charge pressure condition. Under certain operating conditions, however, this relationship is reversed, which has adverse effects on the regime.
- the object of the invention is to easily control the operating point of an exhaust gas turbocharger in each operating range of the internal combustion engine.
- the controlled variable is a function of the boost pressure P 2 in a charge air line and a correction factor K F , where:
- the invention thus makes it possible to eliminate the ambiguities in the regulation of the exhaust gas turbocharger and to optimally adjust the actuator of the variable flow geometry to the required values.
- the correction factor KF is preferably a function of the ratio of the pressure P 3 in an inlet flow path of the exhaust gas turbine and at least one pressure reference value X, where:
- X / P 3 * P 2 is thus used as the controlled variable NF, wherein different pressure values can be used for X.
- the use of this controlled variable makes it possible in a simple and reliable manner to regulate the operating point of the exhaust gas turbine or its Anströmungsgeometrie, especially if no continuous relationship or a change in the sign between the change in position of the actuator of the variable Turbinenan- flow geometry and the adjusting boost pressure is present.
- the pressure P 3 in the inlet flow path of the exhaust gas turbine can be measured or modeled on the basis of other measured values.
- the pressure P 4 in the outlet flow path of the exhaust gas turbine can be used for the modeling, and the pressure difference across the exhaust gas turbine (P 3 -P 4 ) can be added.
- this pressure difference is modeled via the exhaust gas turbine using the values of exhaust gas mass flow via the exhaust gas turbine, turbine speed and position of the flow geometry (VTG position).
- the pressure P 4 in the outlet flow path of the exhaust gas turbine is measured or modeled on the basis of measured values.
- P 4 can be added by adding the ambient pressure Po and the pressure difference via the exhaust aftertreatment system (P 4 -Po).
- this pressure difference is modeled via the exhaust aftertreatment system on the basis of other measured values, such as, for example, temperature in the outlet flow path, exhaust gas mass flow and state of the exhaust gas aftertreatment (eg loading of a DPF).
- the method can be carried out with little cost of materials in a control unit of the internal combustion engine and sensors can be partially eliminated.
- the object of the invention can be conveniently solved with an aforementioned control unit for an internal combustion engine for carrying out the method described above, wherein the internal combustion engine has at least one exhaust gas turbine with variable Anströmungsgeometrie and adjustable the Anströmungsgeometrie the exhaust gas turbine with a controller over a controlled variable for the operating point of an exhaust gas turbine is.
- the controlled variable at least one first pressure sensor in a charge air line and / or or a second pressure sensor in an inlet flow path of the exhaust gas turbine and / or a third pressure sensor in an outlet flow path of the exhaust gas turbine and / or a fourth pressure sensor in the vicinity of the internal combustion engine.
- FIGS. Dari n show:
- FIG. 1 is an illustration of the undesirable boost pressure change by position of the variable turbine inflow geometry
- Fig. Figure 2 shows the boost pressure versus the degree of opening of the variable turbine flow geometry
- FIG. 3 shows the controlled variable determined by the method according to the invention, plotted against the degree of opening of the variable turbine inflow geometry
- Fig. 4 schematically shows an internal combustion engine including control unit for the
- Fig. 1 the temporal course of the charging pressure P 2, the input let air mass flow ⁇ , the position SEGR a Abgasschreib technologicalventi ls and the position SVGT a Stel toddlers are Exem plarisch (also VTG positioner hereinafter) of the variable Turbi ⁇ nenanströmgeometrie (VTG) applied.
- VTG positioner also VTG positioner hereinafter
- VTG positioner also VTG positioner hereinafter
- VTG positioner Turbi ⁇ nenanströmgeometrie
- the mentioned Maximu m occurs at an opening degree OG of 0.4.
- the undesirable change in the charge pressure P2 is now due to the fact that it is for a boost pressure value - in Fig. 2, the value 1.5 - two opening Stel ments OG on both sides of the Maxim by P 2 M and therefore ⁇ no unambiguous state can be set for the exhaust gas turbocharger.
- the controlled variable NF is now plotted against the opening degree OG of the variable turbine geometry for different positions of the EGR valve (20%, 25%,... 70%, 80% -represented in FIG. 3 by the corresponding percentage value).
- the associated engine assembly 100 is shown in FIG. 4 shown.
- the control variable N F is composed according to the invention of the boost pressure P2 and a correction factor KF:
- This correction factor KF is formed from the reverse pressure ratio across the exhaust turbine 5.
- Both the pressure P 3 in the inlet flow path 4 a of the exhaust gas turbine 5 and the pressure P 4 in the outlet flow path 4 b of the exhaust gas turbine 5 can either be measured directly or modeled using other measured values.
- the known ambient pressure Po and / or the pressure P 4 in the outlet flow path 4b can be used, for example.
- P 3 would then be, for example P 4 + the pressure drop across the exhaust turbine 5, which is determined based on, for example, the temperature, the exhaust gas mass flow through the exhaust turbine 5, turbine speed and position of the VTG actuator.
- the exhaust gas mass flow is determined via the measured fresh air and fuel masses.
- the pressure P 4 can be modeled from the ambient pressure Po and the pressure drop via a possibly existing exhaust aftertreatment device 15.
- control variable NF has no extreme values and a continuous course without reversal of the sign above the illustrated opening degree OG of the variable turbine flow geometry VTG.
- NF is much better than controlled variable suitable as the boost pressure P 2 alone.
- control variable NF By using the control variable NF, a much simpler and more accurate regulation of the variable turbine geometry over the entire operating range can be achieved - compared to known methods, which rely only on the boost pressure P 2 as a controlled variable.
- the control variable NF is composed of the boost pressure P 2 , the pressure P 3 in the inlet flow path 4 a of the exhaust gas turbine 5 and the pressure P 4 in the outlet flow path 4 b of the exhaust gas turbine 5.
- FIG. 4 schematically shows an internal combustion engine arrangement 100 with internal combustion engine 1 having an inlet line 3 upstream of the compressor 12, a charge air line 2 downstream of the compressor 12, an exhaust gas turbine 5 with variable turbine geometry VTG, which together with the compressor 12 forms the turbocharger 6 (dashed box to exhaust turbine 5 and compressor 12) and an outlet strand 4.
- the Turbinenanströmgeometrie and the associated VTG controller are not shown for reasons of clarity.
- an air filter 14 and in the charge air line 2, a charge air cooler 13 is provided in the inlet strand 3 in the illustrated embodiment.
- an exhaust gas aftertreatment device 15 In exhaust duct 4 downstream of the exhaust gas turbine, an exhaust gas aftertreatment device 15, which is not explained in more detail, is arranged.
- an EGR line 10 extends with an EGR valve 11.
- the pressure P 3 in the inlet flow path 4 a of the exhaust gas turbine 5 and the pressure P 4 in the outlet flow path 4 b of the exhaust gas turbine 6 pressure transducers 7, 8, 9 are provided, which are connected to an electronic control unit ECU.
- the first pressure transducer 7 is arranged in the charge air line 2 and measures the boost pressure P 2
- the second pressure transducer 8 for measuring the pressure P 3 is arranged in the inlet flow path 4a
- the third pressure transducer 9 for measuring the pressure P 4 in the outlet flow path 4b may be provided, which receives the ambient pressure Po in an environment of the internal combustion engine arrangement outside of a schematically represented boundary 17.
- the pressure P 4 can also be modeled, for example, with the aid of the measurement of the ambient pressure Po and the modeling and measurement of the pressure drop via the downstream exhaust gas aftertreatment system 15. Furthermore, instead of the second pressure transducer 8, the pressure P 3 can also be calculated with the aid of P 4 and the modeled pressure drop across the turbine.
- the adjustment of the Anströmgeometrie the exhaust gas turbine 5 and thus control of the operating point of the exhaust gas turbine 5 is then via the control unit ECU, as shown by the dashed line between the control unit ECU and turbocharger 6.
- Other control sections such as the EGR valve 11 are not shown for reasons of clarity.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112016001463.5T DE112016001463A5 (de) | 2015-03-30 | 2016-03-30 | Verfahren zur Regelung des Betriebspunktes einer Abgasturbine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50251/2015A AT517033B1 (de) | 2015-03-30 | 2015-03-30 | Verfahren zur regelung des betriebspunktes einer abgasturbine |
ATA50251/2015 | 2015-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016154650A1 true WO2016154650A1 (de) | 2016-10-06 |
Family
ID=55750265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2016/050080 WO2016154650A1 (de) | 2015-03-30 | 2016-03-30 | Verfahren zur regelung des betriebspunktes einer abgasturbine |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT517033B1 (de) |
DE (1) | DE112016001463A5 (de) |
WO (1) | WO2016154650A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000020746A1 (en) * | 1998-10-02 | 2000-04-13 | Caterpillar Inc. | Device for controlling a variable geometry turbocharger |
US6067800A (en) * | 1999-01-26 | 2000-05-30 | Ford Global Technologies, Inc. | Control method for a variable geometry turbocharger in a diesel engine having exhaust gas recirculation |
EP1024272A1 (de) * | 1999-01-26 | 2000-08-02 | Ford Global Technologies, Inc. | Steuerungsverfahren für einen turboaufgeladenen Dieselmotor mit Abgasrückführung |
WO2001055575A1 (en) * | 2000-01-25 | 2001-08-02 | International Engine Intellectual Property Company, Llc | Control of a variable geometry turbocharger by sensing exhaust pressure |
EP2703626A2 (de) * | 2012-08-28 | 2014-03-05 | Kabushiki Kaisha Toyota Jidoshokki | Steuerverfahren und Steuervorrichtungen für Verbrennungsmotoren |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5123246A (en) * | 1991-01-25 | 1992-06-23 | Mack Trucks, Inc. | Continuously proportional variable geometry turbocharger system and method of control |
GB9611015D0 (en) * | 1996-05-25 | 1996-07-31 | Holset Engineering Co | Variable geometry turbocharger control |
US6681573B2 (en) * | 2002-02-05 | 2004-01-27 | Honeywell International Inc | Methods and systems for variable geometry turbocharger control |
-
2015
- 2015-03-30 AT ATA50251/2015A patent/AT517033B1/de active
-
2016
- 2016-03-30 WO PCT/AT2016/050080 patent/WO2016154650A1/de active Application Filing
- 2016-03-30 DE DE112016001463.5T patent/DE112016001463A5/de active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000020746A1 (en) * | 1998-10-02 | 2000-04-13 | Caterpillar Inc. | Device for controlling a variable geometry turbocharger |
US6067800A (en) * | 1999-01-26 | 2000-05-30 | Ford Global Technologies, Inc. | Control method for a variable geometry turbocharger in a diesel engine having exhaust gas recirculation |
EP1024272A1 (de) * | 1999-01-26 | 2000-08-02 | Ford Global Technologies, Inc. | Steuerungsverfahren für einen turboaufgeladenen Dieselmotor mit Abgasrückführung |
WO2001055575A1 (en) * | 2000-01-25 | 2001-08-02 | International Engine Intellectual Property Company, Llc | Control of a variable geometry turbocharger by sensing exhaust pressure |
EP2703626A2 (de) * | 2012-08-28 | 2014-03-05 | Kabushiki Kaisha Toyota Jidoshokki | Steuerverfahren und Steuervorrichtungen für Verbrennungsmotoren |
Also Published As
Publication number | Publication date |
---|---|
DE112016001463A5 (de) | 2018-01-11 |
AT517033A1 (de) | 2016-10-15 |
AT517033B1 (de) | 2018-06-15 |
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