WO2010124701A1 - Verdichter mit drallerzeuger bei einem kraftfahrzeug - Google Patents
Verdichter mit drallerzeuger bei einem kraftfahrzeug Download PDFInfo
- Publication number
- WO2010124701A1 WO2010124701A1 PCT/EP2009/003101 EP2009003101W WO2010124701A1 WO 2010124701 A1 WO2010124701 A1 WO 2010124701A1 EP 2009003101 W EP2009003101 W EP 2009003101W WO 2010124701 A1 WO2010124701 A1 WO 2010124701A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- swirl generator
- combustion engine
- internal combustion
- swirl
- valve
- Prior art date
Links
Classifications
-
- 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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
- F02B25/145—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke with intake and exhaust valves exclusively in the cylinder head
-
- 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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0261—Controlling the valve overlap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
- F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
- F02M29/06—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like generating whirling motion of mixture
-
- 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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/32—Engines with pumps other than of reciprocating-piston type
- F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
-
- 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
- F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
-
- 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
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
-
- 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
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/04—Mechanical drives; Variable-gear-ratio drives
-
- 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
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
- F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/08—EGR systems specially adapted for supercharged engines for engines having two or more intake charge compressors or exhaust gas turbines, e.g. a turbocharger combined with an additional compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
-
- 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 present invention relates to a vehicle drive comprising an internal combustion engine with a supercharging, a method for operating a supercharged internal combustion engine of a motor vehicle, and an application of a swirl generator in an internal combustion engine.
- Object of the present invention is to provide an improvement of a fresh gas filling for supercharged direct injection internal combustion engines of motor vehicles available.
- An adjustment of the swirl generator is carried out, for example, adapted to a rinsing process of the cylinder.
- a throttle action of the swirl generator can be adjusted by appropriate adjustment and / or swirl generation of the swirl generator.
- a control of an adjustment of the swirl generator and the valve overlap in dependence on one another for influencing a filling of the cylinder takes place.
- a corresponding program may be provided in an engine control unit, by means of which such a control is executable.
- the controller may be designed so that a higher charge pressure of the charge and by an adjustment of the valve overlap adapted thereto a faster flushing in the cylinder can be generated by an adjustment of the swirl generator. This means that, for example, the period of valve overlap could also be shortened.
- a load control of the internal combustion engine takes place via the swirl generator.
- the load control takes place exclusively via the swirl generator over an operating range.
- no combustion valve is assigned to the internal combustion engine, so that load control is carried out essentially exclusively via the swirl generator and the variable valve control.
- the proposed operation is in an operating range of Used internal combustion engine, which is at least close to full load.
- the proposed operation is used to reduce a knock sensitivity of the internal combustion engine. In this case, for example, consideration can be given to the currently used fuel, for which purpose a fuel sensor can be used, for example.
- a vehicle drive comprising a supercharged internal combustion engine, a supercharging of the internal combustion engine, an adjustable, variable valve drive of the internal combustion engine, a control device and an adjustable swirl generator, wherein the swirl generator is arranged in front of a charging unit of the supercharger, and the control unit with the Swirl generator and the variable valve train is connected and has a control that sets an adjustment of the variable valve train with an adjustment of the swirl generator for generating a valve overlap for purging a combustion chamber of a cylinder of the internal combustion engine in correlation.
- Correlation in the broadest sense means a combination of the two settings.
- a setting can be stored in a map or be calculated accordingly.
- a correlation between the setting of the variable valve train and a setting of the swirl generator can be made via one or more models as well as via corresponding numerical methods or direct calculation from mathematical formulations.
- the correlation can be done directly as well as indirectly, with one or more further influencing parameters in particular being able to be taken into account when using an engine control unit.
- the crankshaft speed, a pressure in an intake manifold, a mass flow, a temperature and / or an indication regarding the fuel used can be included in the correlation.
- an adjustment with regard to the associated supercharger or charging itself, a load request, a state of the internal combustion engine, a dependence on emissions, an injection time of a fuel and / or an injection course of an influence can further influence fuel.
- Information relating to charging may relate, for example, to information regarding a vane position, in particular a vane position, as well as information relating to a rotation, for example, of a compressor and / or a pressure in front of or behind the compressor.
- the engine control unit is capable of at least controlling a setting of the swirl generator as well as a valve overlap, if not even controlling one or both of these, and this can be adjusted for example using a variety of targets.
- Possible destination Specifications are, for example, a generation of a fast torque, for example via a faster purging, as well as by generating a higher pressure in the combustion chamber and thus a faster startup of a compressor by appropriate swirl impact, influencing an emission of Verbrennungskraftma- machine depending, for example, on a state an exhaust gas treatment device, a load state or an operating requirement to the internal combustion engine.
- a generation of a fast torque for example via a faster purging, as well as by generating a higher pressure in the combustion chamber and thus a faster startup of a compressor by appropriate swirl impact, influencing an emission of Verbrennungskraftma- machine depending, for example, on a state an exhaust gas treatment device, a load state or an operating requirement to the internal combustion engine.
- the engine control unit may also be coupled together.
- a control of the control unit of the swirl generator be used to set an air volume flow.
- the swirl generator can serve as a throttle.
- the swirl generator supports another throttle located in an air path or even is arranged as the only adjustable throttle in an air path.
- the control device has a load control deposited by means of the swirl generator.
- the function of the swirl generator is used as a throttle as well as the function to increase a degree of supercharging.
- the internal combustion engine is equipped without throttle valve, wherein the control unit adjusts the swirl generator for controlling an air volume flow in a combustion chamber of a cylinder of the internal combustion engine. For a load control, this is preferably carried out together with an adjustment of the variable valve drive.
- a further embodiment provides that a throttle valve is provided, wherein the position of the throttle valve and the position of the swirl generator are correlated with each other. This correlation can be stored in the control unit. For example, this may be arranged in front of the swirl generator, the throttle seen in the flow direction.
- a throttle valve is arranged in the flow direction behind a charging unit and preferably behind a swirl generator.
- the swirl generator is adjustable to impart a swirl in a direction of rotation of a compressor unit of the charge of a flow, as well as is adjustable to impart a twist opposite to a direction of rotation of the compressor unit of the flow. In this way, for example, a filling of a combustion chamber can be increased, or, if desired, also reduced.
- an adjustment of the geometry of the swirl generator also allows the possibility that a blow-off of compressed air in the air path may occur. can be avoided, since, for example, the swirl generator can be used as a throttle acting supportive for the compressor unit at certain operating points.
- the drive can have an internal combustion engine operating according to the Otto and / or the diesel principle, direct injection can be constructed as well as without direct injection, have a homogeneous process as combustion process, have an antechamber for mixture formation as well as with other, different combustion processes, mixture formation and corresponding internal combustion engines can be used.
- a motor vehicle drive is therefore described by way of example as comprising a directly injecting, supercharged internal combustion engine, a valve drive of the internal combustion engine with preferably variably adjustable valves and with a swirl generator arranged upstream of the internal combustion engine, which impart a swirl to an air flow to be supplied to the internal combustion engine the swirl generator has an adjusting device for achieving a different degree of twist.
- the drive further comprises a control unit, which is connected to the swirl generator and the valve train, wherein the control unit has a correlation between at least one imposed swirl and a valve overlap of at least one intake valve and at least one exhaust valve of the valve train deposited on at least one cylinder of the internal combustion engine.
- the valve train of the internal combustion engine with preferably variably adjustable valves may have an electromagnetic actuation of the valves. However, it can also be designed mechanically, hydraulically or by a combination of different Stelltriebon for different valves. For example, a cam adjustment may be provided which acts, for example, on a part of the intake or exhaust valves. It can also be provided that a fully variable valve train is provided. Preferably, the valve train is able to independently actuate intake and exhaust valves, which are assigned to a cylinder of the internal combustion engine, each independently. For example, it is provided that each individual of the valves associated with a cylinder with respect to its opening or Closing time changeable adjustable.
- Another embodiment provides that, for example, only one valve, for example an inlet valve or an outlet valve, can be changed in its times. In this way, a valve overlap of inlet and outlet valves can be adjusted, in particular this can be done via a control or control.
- An exemplary embodiment of a change of valve opening and / or valve closing times and a corresponding device is disclosed in DE 103 467 47 A1, to which reference is made in its entirety in the context of the disclosure.
- the adjustment of valve opening as well as closing times can preferably be used at least in conjunction with the swirl generator for load control.
- the upstream of the internal combustion engine swirl generator is preferably upstream of a likewise disposed of the internal combustion engine charge in the flow direction.
- the swirl generator is for example able to impart a rotational flow to a flow to be supplied to the internal combustion engine.
- a swirl is preferably already transferred thereby into a charging device to be used, possibly even used there due to the charging technique used to reinforce a pressure build-up.
- the swirl generator is coupled to a flow compressor. The swirl generation makes it possible that flow blades of the compressor are flown differently than without swirl generator.
- the swirl generator can bring about an inflow of the moving blades with a velocity component that enhances the compression. This achieves a faster response of the compressor together with a higher compression, whereby a fresh gas filling and thus a rinsing with higher fresh gas flow is made possible.
- the compressor may be coupled to an exhaust gas turbine. However, the compressor can also be arranged without exhaust gas turbine alone in the inflow line to the internal combustion engine, for example as a mechanically or electromagnetically driven compressor.
- the swirl generator can be arranged, for example, in a multi-stage charging between, for example, a low-pressure charging and a high-pressure charging.
- two or more swirl generators may be upstream of the internal combustion engine.
- a swirl generator is provided, which is in particular preceded by a charge.
- the internal combustion engine in addition to the Lasskanal the internal combustion engine to be provided a reduction of a channel cross-section, for example by means of a turbulence generating device.
- a turbulence generating device is not to be understood as a swirl generator of the present invention.
- the swirl generator is arranged outside the cylinder head, that is separate from the internal combustion engine, and preferably, for example, viewed in the flow direction along an air path before charging, for example in the form of a compressor, compressor or the like, or integrated into this.
- Exemplary embodiments of various charging possibilities, in which one or more swirl generators are provided go, for example, from DE 10 2006 026 166 A1, DE 10 2006 011 862 A1, DE 10 2005 045 194 A1, DE 10 2004 039 299 A1, and the like also WO 2007135 089 A1.
- DE 10 2006 026 166 A1, DE 10 2006 011 862 A1, DE 10 2005 045 194 A1, DE 10 2004 039 299 A1, and the like also WO 2007135 089 A1.
- the swirl generator can preferably be designed in conjunction with a compressor in the form of a guide vane adjustment, wherein the guide vanes are preferably at the same time via an adjusting device together in their respective position changeable.
- the swirl generator has no guide vanes, if a compressor is used. Rather, the swirl generator is preferably designed as it appears from the above-mentioned documents.
- a further embodiment provides, for example, that a swirl generator viewed in the flow direction, for example, is arranged in front of a Leitschaufelapparat.
- the vane apparatus may, for example, according to a development having one or more adjustable vanes.
- a low-pressure and high-pressure compression reference is made, for example, to DE 10 2006 027 738 A1.
- the correlation that is stored in the control unit and according to which a swirl application takes place can, for example, have a size of the swirl implemented directly.
- a characteristic map or a mathematical relationship can be stored for this purpose.
- the spin can indirectly enter into the correlation, for example by a link a position of the swirl generator with a mass flow through the swirl generator. It is also possible to use other parameters via which the spin is indirectly included in the correlation, for example a load point, a rotational speed of the crankshaft, a rotational speed of a supercharger, in particular a compressor, a speed of a sucked air mass flow and / or for example a load request.
- a temperature-dependent component can also be included in the correlation, for example, as well as a pressure-dependent component.
- a density-dependent component in each case preferably based on the mass flow flowing through the swirl generator.
- this can be stored directly in the control unit, absolutely, as time, duration, broken down to individual valves as well as indirectly, for example in the form of control times, control periods, opening and closing times, for example, by the control unit as target and / or actual values are detected and / or predetermined.
- the control unit may, for example, be a valve train control unit which is connected to a motor control unit. Also, the controller may be the engine control unit itself.
- an internal and / or external exhaust gas recirculation is provided.
- a single exhaust gas recirculation may be provided.
- an exhaust gas recirculation on the one hand in a high-pressure part and on the other in a low-pressure part.
- hot exhaust gas viewed in the flow direction before charging, is supplied again and thus the mixture of sucked-in airflow and supplied exhaust gas flow is passed not only through the charge but also through the swirl generator itself. If exhaust gas is added to a supplied air flow, the temperature increases.
- the swirl generator is correspondingly temperature-resistant.
- the swirl generator for example, at least partially made of high temperature resistant plastic.
- the swirl generator has at least partially metal parts, preferably made of stainless steel.
- a light metal is used, for example, alloys are used, as they are known from the valve, the cylinder head or the like.
- the swirl generator is adjustable by means of an actuator.
- the actuator is able to guide the adjusting device of the swirl generator, so that a targeted positioning is carried out, which can be predetermined.
- a position of the swirl generator in particular to the respective operating set adjusted point of the internal combustion engine and also to be able to adjust this position to changes that occur suddenly, immediately.
- a monitoring unit is provided in the drive, which monitors at least one swirl generation as well as a valve overlap.
- the swirl generation can be determined by setting a valve overlap adapted to a specific operating point of the internal combustion engine or a load. From the operating point is then closed back to a flow condition.
- a mass flow sensor can be deduced by a mass flow sensor to a speed that is present at the swirl generator and has been generated and turned off an adjustment of the adjusting carried out by the associated drive or are dubbed.
- this can be used a pressure sensor downstream of the charge, for example.
- via a map can then be closed to a swirl that is impressed on this air flow and is then adjusts with appropriate short delay then in the flushing of the combustion chamber of the cylinder during the valve overlap of inlet and outlet valve of the associated valve train or effects.
- the monitoring unit may for example be integrated in an engine control unit. Furthermore, there is the possibility that the monitoring unit is shared.
- control unit which is assigned to the swirl generator
- monitoring unit for example integrated in a control unit, which is assigned to the valve train.
- control unit which is connected to the swirl generator and the valve train, integrated as an engine control unit, the monitoring unit.
- valve overlap of intake and exhaust valve or intake and exhaust valves of the valve train can be adjusted not only with respect to the respective load point, but also with respect to the impressed twist.
- This can be done according to a development in cooperation with an exhaust gas purification, as it is downstream of the internal combustion engine and / or arranged in the exhaust gas recirculation channel with.
- the impressed swirl makes it possible to achieve improved rinsing during valve overlap.
- the resulting nitrogen oxide emissions can be reduced.
- a filling of the combustion chamber can be improved.
- the opening and closing times of inlet and outlet valves of the associated cylinder can be aligned with the position of the adjusting device of the swirl generator.
- Insbesonde- Advantageous is the use of the swirl generator in an internal combustion engine, which can be switched between diesel and Otto principle.
- combustion engines also referred to as Combined Combustion Engines, abbreviated CCS, or an associated method, homogeneous compression ignition, abbreviated HCCI, are advantageous with such a swirl generation and preferably in coordination of the swirl generation on the scavenging at a desired set valve overlap for the particular process principle to be used used.
- the swirl generator can also be used to be able to support a homogenization during the intake stroke with simultaneously injected fuel.
- a homogenized injection method in particular with a multiple injection preferably exclusively during the intake stroke, for example, results from DE 10 2006 030 213, to which reference is made in its entirety within the scope of this disclosure.
- the combustion method presented there, in particular the homogenization can be used, for example, in a cam-controlled variable valve train internal combustion engine, as is apparent from PCT / EP 2007/007385, which has not yet been published.
- a combination of an adjustable suitable valve overlap, which is accompanied by variable valve timing with a Ver emphasizervordrall has the consequence that especially at an acceleration of a vehicle in the so-called turbo lag, the valve overlap at a boost by boost increased boosting the cylinder of an associated internal combustion engine causes.
- a method for operating a supercharged internal combustion engine of a motor vehicle for flushing a combustion chamber of a cylinder of the internal combustion engine comprises an adjustable swirl generator arranged upstream of a supercharger.
- the adjustment is adjusted to the flushing of the combustion chamber, in particular to an adjustable suitable valve overlap of intake and exhaust valves.
- a valve overlap with the swirl generated by the swirl generator is adjusted to one another. It is preferably provided that a swirl impact is increased immediately before a valve overlap on the cylinder.
- a further embodiment provides that, for example, for an internal exhaust gas recirculation, that is to say for a brief opening and closing of an exhaust valve for recirculating combusted exhaust gas back into the combustion chamber, a corresponding swirl impingement by the swirl generator is reduced and thus an increase in pressure is either reduced or avoided ,
- a further embodiment provides that, for example, in an acceleration phase of the internal combustion engine or during another phase of operation, an external exhaust gas recirculation and a swirl increase take place, wherein the valve overlap is shortened by its duration.
- the swirl generator adjusts automatically depending on the intake air mass flow, and thereby imposes a higher or lower swirl.
- the swirl generator can only partially adjust itself. This adjustment can include, for example, a positioning by the actuator in a first coarse position, while a fine positioning takes place automatically.
- the automatic adjustment of the swirl generator can additionally or separately comprise that the swirl generator can automatically position itself in one operating range while it is selectively positioned via another part of the operating range of the internal combustion engine via a drive of the adjusting device. This can be done for example by means of a lockable freewheel.
- the swirl generator only externally controlled allows a change in position and thus a change in the impressed swirl.
- Preferred is a use of coupled to a supercharger swirl generator to improve a purging of a combusted fuel-air mixture from a cylinder, an internal combustion engine of a motor vehicle during a valve overlap of inlet and outlet valve of the cylinder.
- FIG. 1 shows a first exemplary schematic representation of a drive
- FIG. 4 shows a further schematic view of an internal combustion engine.
- Fig. 1 shows a first drive 1 in a schematic representation.
- the first drive 1 summarizes an internal combustion engine 2, which is also shown only schematically with a combustion chamber 3, an intake valve 4 and an exhaust valve 5 and an actuator for the valve train 6.
- There are only schematically the inlet and outlet valves 4, 5 shown At least one inlet and one outlet valve 4, 5 can be assigned to each cylinder. However, at least two inlet valves and two outlet valves are preferred. These can be actuated individually in particular via the actuator 6, for example, or for example via a corresponding cam device in groups.
- the internal combustion engine 2 is connected on the inlet side to a first compressor 7.
- the first compressor 7 may be an electrically driven compressor or a mechanically driven compressor.
- the first compressor 7 is not coupled to an exhaust gas turbine. Rather, the energy for driving the compressor is made available exclusively via a mechanical or electrical coupling. This has the advantage that the first compressor 7 can be actuated in particular in a lower speed range, in which the compressor when driving through a turbine in the exhaust line otherwise may not receive sufficient energy with fast load requirements.
- the compressor is connected to an exhaust gas turbine.
- the exhaust gas turbine is indicated by dashed lines.
- the first compressor 7 may alternatively be operated by the turbine and / or an electric or mechanical drive.
- the first compressor 7 is preceded by a first swirl generator 8 with an actuator 9.
- the swirl generator 8 can change an inflow to the first compressor 7 such that a swirl is imparted to the flow.
- This swirl is preferably a flow direction component which is introduced into the intake flow, which preferably runs rotationally symmetrically about an axis of the swirl generator 8.
- the swirl generator 8 can mit- be changed in its positioning so that a different spin embossing is possible means of an actuator 9.
- a different flow to the downstream compressor 7 can be impressed, in particular in coordination with the rotor blade geometry of the compressor blades of the first compressor 7.
- the first compressor 7 can have adjustable guide vanes and / or rotor blades to have.
- the swirl generator 8 preferably has adjustment possibilities adapted to it, so that a pre-swirl application by the swirl generator 8 is possible, coordinated with the mass flow passing through the compressor and the rotational speed of the compressor. Also, not only a swirl of the flow can be impressed on the swirl generator 8 preferably. Rather, the swirl generator can block the cross section of the line changeable. In this way, the swirl generator simultaneously serves as a throttle or channels the flow in such a way that according to one configuration of the entire or at least the major part of the flow, a swirl is imparted.
- the swirl generator 8 produces an improved compression in the first compressor 7.
- the impressed swirl in particular reinforced by the compressor, continues to be carried into the internal combustion engine 2 and contributes there to improved rinsing during a valve overlap of inlet and outlet valves 4, 5.
- contributes to the improved flushing also that due to the swirl generation increased compression in the first compressor is made possible.
- This pressure build-up in particular in a lower speed range, is able to compensate for an otherwise possibly existing exhaust gas turbocharger hole in the torque curve.
- the gas flowing out of the internal combustion engine 2 is at least partially supplied via an exhaust line 10 to an exhaust gas purification system 11 and depending on the type of internal combustion engine 2, the exhaust gas purification system 11, a 3-way catalytic converter, a NOx storage catalytic converter, a HC FaIIe, a particulate filter and / or another, the exhaust gas influencing device, for example, a urea injection.
- the exhaust line 10 performs an external exhaust gas recirculation 12 back to a suction line 13 of the drive 1.
- a switchable valve 14 the supplied exhaust gas backflow can be controlled in the intake manifold 13, but in particular also be controlled.
- an exhaust gas cooler 15 and / or an exhaust gas purification system 16 may be arranged in the external exhaust gas recirculation 12. These can also be integrated with each other, as shown, as a component.
- the individual components are higher than the control unit 17, for example, a motor control.
- the fashion Gate control is connected directly to the individual components to be controlled or with these over the individual components associated control devices.
- sensors such as mass flow sensors, temperature sensors, speed sensors, pressure sensors, ⁇ probes or other sensors which are arranged in the intake line 13 and / or in the exhaust line 10.
- the swirl generator 19 is arranged between a second compressor 20 and a third compressor 21.
- the third compressor 21 is coupled to a turbine 22, via which the compressor is driven.
- the second compressor 20, however, is preferably driven electrically or mechanically, but according to another embodiment may also be coupled to a turbine.
- the swirl generator 19 has, in addition to the device for swirling, a device for mass flow throttling. This device 23 is indicated schematically. A detailed construction of such a swirl generator 19 is apparent, for example, from the abovementioned prior art, to which reference is made in the context of the disclosure relating to the construction of various swirl generators. In the context of the disclosure, reference is therefore made to these documents.
- the second compressor 20 for example, a first charge in the intake manifold 24 is realized.
- the swirl can then be impressed on the one hand and, on the other hand, the mass flow generated by means of the second compressor 20 can be throttled. Due to the throttling, an increase in speed is allowed in the remaining cross section. In this case, an additional swirl impact can be caused.
- the third compressor 21 a preferred pressure increase can thus be achieved with appropriate design of the flow from the swirl generator 19 to the third compressor 21.
- the compressor as well as the coupled turbine 22 can react faster to a load request.
- Fig. 3 illustrates a graph 30 in which various time-adjusting torque curves of operating on the four-stroke principle and the same performance internal combustion engines are shown.
- a torque curve 32 of a supercharged first internal combustion engine operating according to the diesel principle represents the lowest torque level of the graph 30.
- a torque curve 34 of a second supercharged internal combustion engine operating according to the diesel principle in which a compressor advance generates generates an increase in torque.
- a further increase in torque can be seen in a torque curve 36 of a third supercharged internal combustion engine operating according to the diesel principle, in which instead of a compressor advance variable valve timing is used, which causes variable valve bypasses.
- a torque curve 38 of a fourth operating according to the diesel principle supercharged internal combustion engine to increase a further increase in torque development as come in this internal combustion engine according to the invention with both variable valve timing variable suitable valve overlaps as well as generating a Ver emphasizervordralls used.
- graph 30 illustrates a torque curve 40 of a performance-type internal combustion engine operating according to the Otto principle whose linearly increasing torque range merges into a torque plateau. Although this internal combustion engine initially reaches a higher torque level for a short time, its achieved torque plateau falls short of the described curves 36, 38 a short time later.
- FIG. 4 shows, in an exemplary schematic view, a vehicle 30 with a vehicle drive 31, wherein the vehicle drive 31 is shown greatly simplified.
- An air path 32 has a first device 33 and a second device 34.
- the first device 33 may be, for example, a throttle valve, the second device 34 a swirl generator with charging. It is also possible that the first device 33 comprises a swirl generator with charging, while the second device 34 is a throttle valve.
- a cylinder 35 can be flushed and filled by means of a variable valve drive, wherein at least one associated inlet valve 36 and outlet valve 37 are at least controlled, in particular regulated, in their respective opening and closing times as well as with respect to their respective stroke via a control device 38 become can.
- the controller 38 may be an engine controller.
- the engine control of the vehicle drive 31 can also manage without a throttle valve according to a development.
- the first device 33 is a first charging step and the second device 34 is a second charging step, which includes a swirl generator.
- a load control can thus be done by the variable valve train and with the aid of the swirl generator on the charge.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009004724T DE112009004724A5 (de) | 2009-04-29 | 2009-04-29 | Verdichter mit drallerzeuger bei einem kraftfahrzeug |
CN200980158984.3A CN102414417B (zh) | 2009-04-29 | 2009-04-29 | 机动车中的带有涡旋发生器的压缩机 |
US13/265,954 US9010111B2 (en) | 2009-04-29 | 2009-04-29 | Compressor comprising a swirl generator, for a motor vehicle |
PCT/EP2009/003101 WO2010124701A1 (de) | 2009-04-29 | 2009-04-29 | Verdichter mit drallerzeuger bei einem kraftfahrzeug |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2009/003101 WO2010124701A1 (de) | 2009-04-29 | 2009-04-29 | Verdichter mit drallerzeuger bei einem kraftfahrzeug |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010124701A1 true WO2010124701A1 (de) | 2010-11-04 |
Family
ID=41480175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/003101 WO2010124701A1 (de) | 2009-04-29 | 2009-04-29 | Verdichter mit drallerzeuger bei einem kraftfahrzeug |
Country Status (4)
Country | Link |
---|---|
US (1) | US9010111B2 (de) |
CN (1) | CN102414417B (de) |
DE (1) | DE112009004724A5 (de) |
WO (1) | WO2010124701A1 (de) |
Cited By (4)
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FR2999251A1 (fr) * | 2012-12-06 | 2014-06-13 | Coutier Moulage Gen Ind | Dispositif d’alimentation d’un compresseur de moteur a combustion interne et conduite d’admission d’air comprenant un tel dispositif d’alimentation |
DE102013008826A1 (de) * | 2013-05-24 | 2014-11-27 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Brennkraftmaschine |
DE102014225887A1 (de) | 2014-01-07 | 2015-07-09 | Volkswagen Aktiengesellschaft | Verbrennungskraftmaschine, Verfahren zum Betrieb einer Verbrennungskraftmaschine und Kraftfahrzeug mit einer Verbrennungskraftmaschine |
DE102013205113B4 (de) * | 2012-03-29 | 2020-03-19 | Mitsubishi Electric Corporation | Brennkraftmaschinensystem |
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DE112015004006T5 (de) * | 2014-10-07 | 2017-06-08 | Borgwarner Inc. | BYPASS-Ventil FÜR KOMPRESSOR |
WO2016118319A1 (en) * | 2015-01-21 | 2016-07-28 | Borgwarner Inc. | Control method for inlet swirl device |
WO2018096590A1 (ja) * | 2016-11-22 | 2018-05-31 | マツダ株式会社 | 圧縮自己着火式エンジンの制御装置 |
US20190040824A1 (en) * | 2017-08-03 | 2019-02-07 | GM Global Technology Operations LLC | Long route-egr connection for compressor inlet swirl control |
US10844817B2 (en) | 2018-04-23 | 2020-11-24 | Ford Global Technologies, Llc | Convolute-swirl integrated duct for swirl generation |
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Also Published As
Publication number | Publication date |
---|---|
DE112009004724A5 (de) | 2012-08-30 |
US20120037133A1 (en) | 2012-02-16 |
CN102414417A (zh) | 2012-04-11 |
CN102414417B (zh) | 2014-01-01 |
US9010111B2 (en) | 2015-04-21 |
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