WO2017139816A1 - Verfahren zum betreiben einer brennkraftmaschine - Google Patents
Verfahren zum betreiben einer brennkraftmaschine Download PDFInfo
- Publication number
- WO2017139816A1 WO2017139816A1 PCT/AT2017/060022 AT2017060022W WO2017139816A1 WO 2017139816 A1 WO2017139816 A1 WO 2017139816A1 AT 2017060022 W AT2017060022 W AT 2017060022W WO 2017139816 A1 WO2017139816 A1 WO 2017139816A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- internal combustion
- combustion engine
- operating mode
- exhaust
- 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
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
-
- 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
- F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
-
- 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
- F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
- F02B37/002—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel the exhaust supply to one of the exhaust drives can be interrupted
-
- 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
- F02B37/005—Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator
-
- 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
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
-
- 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
- F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
- F02B41/02—Engines with prolonged expansion
- F02B41/10—Engines with prolonged expansion in exhaust turbines
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
-
- 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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
-
- 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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/12—Introducing corrections for particular operating conditions for deceleration
-
- 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 operating an internal combustion engine with an intake system and an exhaust system, in particular for driving a motor vehicle, in the exhaust gas in at least one operating mode via a first Abgasströmungsweg by an exhaust gas turbine of the exhaust gas turbocharger of an exhaust gas turbocharger and / or via a second Abgasströmungsweg by a Power turbine having second exhaust gas flow path is passed, the output shaft is connected to an electric generator, wherein the first and second exhaust gas flow paths are merged downstream of the first and the power turbines.
- an internal combustion engine with an outlet header which is connected via a first exhaust gas flow path to an exhaust gas turbine of an exhaust gas turbocharger and via a second exhaust gas flow path to a power turbine.
- the output shaft of the power turbine is either mechanically connected to the internal combustion engine, with another compressor, or an electric generator.
- the exhaust turbine of the turbocharger and the power turbine are arranged in flow parallel to each other and both connect the exhaust manifold with an exhaust pipe.
- the object of the invention is to enable as simple as possible operation of the internal combustion engine with high efficiency.
- the flows through the first exhaust gas flow path and through the second exhaust gas flow path are preferably selected as a function of at least one engine operating parameter of the internal combustion engine selected from the group load signal, boost pressure and exhaust gas temperature, wherein in at least a first operating mode of the internal combustion engine first exhaust gas flow path is passed only through the exhaust gas turbine of the exhaust gas turbocharger and the second exhaust gas flow path through the power turbine is preferably completely closed; in at least a second operating mode of the internal combustion engine, the first exhaust gas flow path is fully opened and the second exhaust gas flow path is partially or fully opened and the exhaust gas is exhausted both via the first exhaust gas flow path through the exhaust gas turbine of the Exhaust gas turbocharger and is passed over the second exhaust gas flow path through the power turbine; in at least a third operating mode of the internal combustion engine, the first exhaust gas flow path - preferably to a minimum flow
- the exhaust turbine of the turbocharger and the power turbine are arranged in flow parallel to each other and both connect the exhaust manifold with an exhaust pipe.
- the output shaft of the power turbine is either mechanically connected to the internal combustion engine, with another compressor, or an electric generator. In a preferred embodiment of the invention, an electric generator is driven by the power turbine.
- the flow adjustment of the first exhaust gas flow path via a preferably arranged between the exhaust gas turbine of the exhaust gas turbocharger and the merger of the first and second flow path - preferably designed as a brake flap - first control member and the adjustment of the second flow path through a preferably upstream of the power turbine arranged second control member.
- a brake flap arranged downstream of the exhaust gas turbine of the turbocharger is typical for vehicle drives for larger commercial vehicles.
- the arranged in the supply line (or derivative) of the power turbine second control element can be partially or completely closed. The derivative of the power turbine is connected to the exhaust pipe only downstream of the first control member.
- the first operating mode is driven in the normal driving mode of the vehicle and covers a large part of the engine map - especially in the middle and upper part load range - from.
- the first control member is brought into its open position and the second control member of the power turbine in its closed position.
- the internal combustion engine reaches the best efficiencies.
- the entire exhaust gas mass flow thus drives the exhaust gas turbine of the exhaust gas turbocharger, whereby an optimal charging efficiency is achieved.
- the second operating mode is assigned to a high part-load range with a load greater than 80 percent of the full load, in particular a full-load range of the internal combustion engine.
- the second operating mode can also be assigned to a heating operation of the internal combustion engine in the lower part load range.
- the first control member is fully open, the second control member is partially or fully opened.
- the maximum amount of exhaust gas routed through the utility turbine can be defined. It has been found in calculations and tests that the best results can be achieved if the absorption capacity of the power turbine between 10% and 50% of the absorption capacity of the exhaust gas turbine of the exhaust gas turbocharger. By the power turbine thus a maximum of between 10% and 50% of the maximum flow rate of the exhaust gas turbine exhaust gas passed.
- the exhaust gas turbine of the exhaust gas turbocharger and / or the power turbine can be equipped either with a fixed blade geometry or a variable blade geometry.
- the second control element When the second control element is completely open, the capacity of both turbines to add up is added. To protect the internal combustion engine (engine protection operation) can thus be limited or lowered, the boost pressure of the internal combustion engine.
- Another application of the second operating mode is the moderate increase in the exhaust gas temperature in the lower part load range of the internal combustion engine (heating operation).
- the third operating mode is assigned to a heating operation and / or a towing operation of the internal combustion engine in the lower part-load range.
- the first control member In the third operating mode, the first control member is in its closed position. In this case, a residual flow cross section for a minimum flow rate remain open in this closed position, so that the exhaust gas turbocharger does not come to a complete halt.
- the second control element of the power turbine is partially or fully open. In this position, no boost pressure is generated.
- the small-sized utility turbine is acted upon by almost the entire exhaust gas mass flow of the internal combustion engine.
- This third operating mode is particularly suitable for towing the engine to generate as much energy through the parallel turbine.
- the second control element can also be partially closed to build the required exhaust pressure for the engine brake - since the second control is not fully closed, the power turbine is driven here, for example, the Battery system of the motor vehicle to load.
- the third operating mode can also be used to greatly increase the exhaust gas temperature at low load of the internal combustion engine and thus, for example, to initiate the regeneration of the exhaust system.
- part of the losses can be recovered via the parallel utility turbine.
- a load signal of the internal combustion engine is greater than zero, and that - in the case of a negative load signal or in the case of a load signal equal to zero - the third operating mode is activated.
- a decompression brake is activated in the internal combustion engine. If this is the case, then the second control member is partially closed.
- a positive load signal it is checked whether the charge pressure in the intake system is below a defined maximum charge pressure. If the maximum charge pressure is exceeded, the second operating mode is activated. If the maximum charge pressure is undershot, it is further checked whether the exhaust gas temperature exceeds a defined minimum exhaust gas temperature. If this is the case, then the first operating mode is activated.
- the measured exhaust gas temperature is lower than the defined minimum exhaust gas temperature, it is further checked whether a regeneration of an exhaust aftertreatment system of the internal combustion engine is required. If it is determined that regeneration is required, the third mode of operation is activated to cause a rapid increase in the temperature of the exhaust gas. Otherwise, a moderate increase in the exhaust gas temperature by means of the second operating mode is sufficient.
- 1 shows an internal combustion engine for carrying out the method according to the invention
- FIG. 2 shows an engine map of this internal combustion engine
- Fig. 3 is a turbine map of the exhaust turbine of the turbocharger and the
- FIG. 4 shows the method according to the invention in a block diagram.
- FIG. 1 shows an internal combustion engine 1 with, for example, six cylinders 2, an inlet system 3 for an inlet flow and an outlet system 4 for an exhaust gas flow. Downstream of an exhaust gas collector 5, the exhaust gas stream is divided into a first exhaust gas flow path 6 and a second exhaust gas flow path 7, wherein in the first partial exhaust stream 6, an exhaust gas turbine 8 of a first exhaust gas turbocharger 9 is arranged, the compressor 10 is arranged in the intake manifold 11 of the intake system 3. 6a designates the turbine feed line to the exhaust gas turbine 8 and 6b the turbine discharge line from the exhaust gas turbine 8. In the second Abgasströmungsweg 7 a Nutzturbine 12 is arranged, the output shaft 13 is mechanically connected to an electric generator 14 for generating electrical energy.
- the first exhaust gas flow path 6 and the second exhaust gas flow path 7 are combined downstream of the exhaust gas turbine 8 and the utility turbine 12 to form a common exhaust gas line 18.
- the location of the merging of the turbine outlets 6b, 7b is denoted by 19.
- Reference numeral 14 denotes an intercooler of the intake system 3 and reference numeral 15 denotes an air filter.
- a first control element 16 formed by a brake flap is arranged in the turbine outlet 6b of the first exhaust gas flow path 6.
- the exhaust-gas turbine 8 and / or the utility turbine 12 can each have a variable turbine geometry or can be bypassed via a bypass valve (waste gate), which is not further illustrated.
- a bypass valve waste gate
- at least the useful turbine 12 may be preceded by a second control element 17 formed, for example, by a flap.
- the second control member 17 is necessary for non-variable turbine geometry, but also advantageous for variable turbine geometry.
- the invention is suitable not only for internal combustion engines 1 with a single exhaust manifold 5, but also for internal combustion engines 1 with a plurality of separate exhaust manifolds.
- the exhaust gas turbine 8 of the exhaust gas turbocharger 9 can be connected to both exhaust manifolds and have a 2-flow turbine housing.
- the utilization turbine 12 is connected to one or both outlet collectors, wherein in the latter case at least the turbine supply line 7a to the utility turbine 12 and the second control device 2 may be designed to be dual-flow.
- FIG. 2 shows an engine map for the internal combustion engine 1, the mean effective brake pressure PB being plotted against the rotational speed n of the internal combustion engine 1.
- A, B, C different operating modes of the internal combustion engine 1 are designated.
- the first operating mode A covers a large part of the engine map - especially in the middle and upper part load range - from, and is driven in the normal driving of the vehicle.
- the first control member 16 is in its open position and the second control member 17 of the power turbine 12 in its closed position.
- the first control member 16 is fully opened, the second control member 17 is partially or fully opened.
- the maximum guided by the power turbine 12 exhaust amount can be set.
- the absorption capacity of the utilization turbine 12 is between 10% and 50% of the intake capacity of the exhaust-gas turbocharger 9.
- This second operating mode B can, on the one hand, be used to limit the boost pressure during full-load operation of the internal combustion engine 1 and to damage the engine as a result of excessive combustion pressures avoid.
- this second operating mode B is suitable for a moderate increase in the exhaust gas temperature at low partial load.
- a portion of the total exhaust gas is passed through the power turbine 12 and driven by the generator 14. By recovering electric power by the generator 14, the overall efficiency of the engine 1 can be improved.
- the first control member 16 is in its closed position, wherein a residual flow cross-section remains open for a minimum flow rate, so that the exhaust gas turbocharger 9 is not completely shut down. stand comes.
- the second control member 17 of the power turbine 12 is partially or fully open. In this position, no boost pressure is generated in the intake system 3.
- the relatively small sized to the exhaust turbine 8 Nutzturbine 12 is applied in the third operating mode C almost the entire exhaust gas mass flow of the internal combustion engine 1.
- This third operating mode C is particularly suitable for the towing operation of the internal combustion engine 1 in order to generate as much energy as possible through the parallel utility turbine.
- the third operating mode C can also be used to greatly increase the exhaust gas temperature at low load of the internal combustion engine and thus, for example, to initiate the regeneration of the exhaust system. Again, some of the losses can be recovered via the power turbine 12.
- Fig. 3 the relative mass flow q m is plotted against the turbine expansion rate ER.
- the diagram shows the influence of the operating modes on the available turbine size.
- FIG. 4 shows schematically the method according to the invention in a block diagram.
- a first step S1 it is checked whether a load signal L> 0. If this is not the case - "n" - the third operating mode C is selected, wherein in a second step S2 checked whether the decompression brake is activated. If the decompression brake is active - "y" -, the second control member 17 is partially closed.
- step S1 If it is determined in step S1 that the load signal L> 0 is "y”, it is checked in a further third step S3 whether the charge pressure p L in the intake system 3 is less than a defined maximum charge pressure p L max (pi_ ⁇ p_max). , If this is not true - "n” - this is the case, the second operating mode B is selected.
- step S3 If it is determined in the third step S3 that the charge pressure p L in the intake system 3 is less than the defined maximum charge pressure pi_max, then in a fourth step S4 it is checked whether the exhaust gas temperature TA exceeds a defined minimum exhaust gas temperature T A min (TA> T A min). If this is the case - "y" -, the first operating mode A is selected. Otherwise, it is checked in a fifth step S5 whether a regeneration of the exhaust aftertreatment system is required. If this is the case - "y" - so the third operating mode C is driven. Otherwise - "n" - the second operating mode B is selected.
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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 |
---|---|---|---|
DE112017000285.0T DE112017000285A5 (de) | 2016-02-19 | 2017-02-07 | Verfahren zum Betreiben einer Brennkraftmaschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50111/2016 | 2016-02-19 | ||
ATA50111/2016A AT518259B1 (de) | 2016-02-19 | 2016-02-19 | Verfahren zum betreiben einer brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017139816A1 true WO2017139816A1 (de) | 2017-08-24 |
Family
ID=58016499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2017/060022 WO2017139816A1 (de) | 2016-02-19 | 2017-02-07 | Verfahren zum betreiben einer brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT518259B1 (de) |
DE (1) | DE112017000285A5 (de) |
WO (1) | WO2017139816A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008064521A1 (de) * | 2008-12-18 | 2010-07-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brennkraftmaschine mit Abgasturbolader |
DE102011012575A1 (de) * | 2011-02-26 | 2012-08-30 | Daimler Ag | Turbine für einen Abgasturbolader, Kraftwagen mit einer Verbrennungskraftmaschine sowie Verfahren zum Betreiben eines solchen Kraftwagens |
US20130055711A1 (en) * | 2011-09-07 | 2013-03-07 | Douglas C. Hofer | Method and system for a turbocharged engine |
US20130164157A1 (en) * | 2011-12-10 | 2013-06-27 | Cummins Ltd. | Generator arrangement |
DE102013001662A1 (de) * | 2013-01-31 | 2014-07-31 | Daimler Ag | Verbrennungskraftmaschine für einen Kraftwagen |
EP2789826A1 (de) * | 2013-04-12 | 2014-10-15 | Liebherr Machines Bulle SA | Antriebssystem |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009257097A (ja) * | 2008-04-11 | 2009-11-05 | Mitsubishi Heavy Ind Ltd | 排気エネルギー回収装置 |
GB2508866B (en) * | 2012-12-13 | 2020-05-20 | Bowman Power Group Ltd | Turbogenerator system and method |
AT515544B1 (de) * | 2014-06-02 | 2015-10-15 | Avl List Gmbh | Verfahren zum betreiben einer einen abgasstrang aufweisenden brennkraftmaschine |
-
2016
- 2016-02-19 AT ATA50111/2016A patent/AT518259B1/de active
-
2017
- 2017-02-07 WO PCT/AT2017/060022 patent/WO2017139816A1/de active Application Filing
- 2017-02-07 DE DE112017000285.0T patent/DE112017000285A5/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008064521A1 (de) * | 2008-12-18 | 2010-07-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Brennkraftmaschine mit Abgasturbolader |
DE102011012575A1 (de) * | 2011-02-26 | 2012-08-30 | Daimler Ag | Turbine für einen Abgasturbolader, Kraftwagen mit einer Verbrennungskraftmaschine sowie Verfahren zum Betreiben eines solchen Kraftwagens |
US20130055711A1 (en) * | 2011-09-07 | 2013-03-07 | Douglas C. Hofer | Method and system for a turbocharged engine |
US20130164157A1 (en) * | 2011-12-10 | 2013-06-27 | Cummins Ltd. | Generator arrangement |
DE102013001662A1 (de) * | 2013-01-31 | 2014-07-31 | Daimler Ag | Verbrennungskraftmaschine für einen Kraftwagen |
EP2789826A1 (de) * | 2013-04-12 | 2014-10-15 | Liebherr Machines Bulle SA | Antriebssystem |
Also Published As
Publication number | Publication date |
---|---|
AT518259B1 (de) | 2017-09-15 |
DE112017000285A5 (de) | 2018-09-13 |
AT518259A4 (de) | 2017-09-15 |
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