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
  • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
  • F02B29/04—Cooling of air intake supply
  • F02B29/0406—Layout of the intake air cooling or coolant circuit
  • F02B29/0437—Liquid cooled heat exchangers
• • 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
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
  • F02M35/10026—Plenum chambers
  • F02M35/10032—Plenum chambers specially shaped or arranged connecting duct between carburettor or air inlet duct and the plenum chamber; specially positioned carburettors or throttle bodies with respect to the plenum chamber
• • 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
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/1015—Air intakes; Induction systems characterised by the engine type
  • F02M35/10157—Supercharged engines
• • 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
  • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
  • F02M35/10—Air intakes; Induction systems
  • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
  • F02M35/10268—Heating, cooling or thermal insulating means
• • 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 an internal combustion engine, in particular of a motor vehicle, with a suction pipe in a fresh air system, which opens into intake passages in a cylinder head of the internal combustion engine, an exhaust system and an exhaust gas turbocharger, a turbine arranged in the exhaust system and driven by the turbine in the fresh air system wherein the turbine has a wastegate passage for bypassing the exhaust gas past a turbine wheel of the turbine, wherein in the wastegate channel, a wastegate valve for selectively opening and closing the wastegate channel is arranged, wherein an electric actuator for actuating the wastegate valve is provided, wherein in the fresh air system downstream of the compressor, a charge air cooler is arranged, according to the preamble of patent claim 1.
• turbocharged turbochargers with rigid geometry and wastegate control are predominantly used in turbocharged gasoline engines, since here the widespread use of the VTG technology (adjustable turbine geometry) for diesel applications is due above all to the high costs associated with the significantly higher exhaust gas temperatures compared to the Diesel are, stand in the way. For price-sensitive applications, the turbo-charged gasoline engine will therefore also have rigid geometry ATL and wastegate control in the future.
• the demand on the wastegate actuator is derived from the fact that in low-end torque and transient operation, the wastegate are closed with high force must and in the range of the rated power sufficient control reserve must be present, so that in the amount of nominal power can be controlled safely, or a reduction can be made to protect against overspeed at the ATL.
• the exhaust back pressure in part-load operation should be as low as possible in order to set a low-consumption minimum charge exchange work can. This tradeoff can only be resolved inadequately by the previous, with overpressure controlled pneumatic actuators on the gasoline engine.
• One solution is electrically operated wastegate actuators, which can be independently operated or regulated by the pressures applied to the engine.
• a generic internal combustion engine with an electric actuator for the wastegate and a charge air cooler is known from DE 10 2005 056 011 A1. This results in particular advantages for the electrical actuation of the wastegate, that the exhaust gas flowing through the wastegate is fed to its own exhaust gas flow.
• the invention is based on the object, an internal combustion engine og. To improve fuel economy and load response performance.
• the intercooler is integrated into the intake manifold and that the intercooler is formed with a water-cooled heat exchanger.
• the water-cooled heat exchanger of the intercooler is connected to a cooling circuit of the internal combustion engine.
• the charge air cooler is a water-air charge air cooler (WL-LLK).
• the electric actuator for actuating the wastegate valve has an electric motor, which is arranged and designed such that the electric motor converts an electrical output signal of an engine control unit directly into an adjusting movement of the wastegate valve.
• the wastegate valve is designed as a wastegate flap.
• Fig. 1 is a schematic representation of a preferred embodiment of an internal combustion engine according to the invention.
• FIG. 2 shows a characteristic diagram for a regulation of the wastegate by means of an electric actuator.
• an internal combustion engine comprises an engine block 10, an exhaust system 12, an exhaust gas turbocharger 14 (ATL) and a fresh air system 16.
• the ATL 14 has a disposed in the exhaust system 12 turbine 18 and one in the fresh air system 16th arranged compressor 20.
• a wastegate channel 22 is further arranged with a wastegate valve 24 such that a portion of the exhaust gas is selectively bypassed by opening the wastegate valve 24 to the turbine.
• the wastegate valve 24, which is preferably designed as a wastegate flap, has an electric actuator 26 for actuating the wastegate valve 24.
• a catalytic converter 28 Downstream of the turbine 18, a catalytic converter 28, in particular a pre-catalytic converter or a main catalytic converter close to the engine, is arranged in the exhaust system 12.
• a bypass passage 30 bridging the compressor 20 is arranged with a diverter valve 32 (SUV). Furthermore, a throttle valve 34 (DKL) and a suction tube 36 is arranged in the fresh air system 16.
• a charge air cooler is integrated with a water-cooled heat exchanger. This water-cooled heat exchanger is connected to a cooling water circuit 38 of the internal combustion engine. This cooling water circuit 38 has a pump 40 and a low-temperature cooler 42.
• FIG. 2 illustrates a characteristic diagram for controlling the wastegate valve 24 by means of the electric actuator 26.
• a rotational speed in [1 / min] is plotted on a horizontal axis 44 and a relative mean pressure in [%] on a vertical axis 46 .
• a first map area 48 the wastegate valve 24 is closed, in a second map area 50, the wastegate valve 24 is opened and in a third map area 52, the wastegate valve 24 is controlled.
• the actuator control also takes place as a function of an accelerator pedal gradient in such a way that at a rapid passage of the pedal, the wastegate valve 24 is basically immediately closed and remains closed until the maximum allowable boost pressure, if the driver does not go from the gas before.
• the charge air cooler is integrated into the suction pipe 36 and equipped with a water-cooled heat exchanger. This ensures that the open in the partial load wastegate valve 24 causes no significant delay in the response of the engine, since there is only a small volume of air between ATL compressor outlet and entry into the combustion chambers of the internal combustion engine. Therefore, the two technologies "electric wastegate actuator” and a "integrated in the intake manifold, water-cooled intercooler” are combined according to the invention.
• the electric wastegate actuator can achieve its advantage, namely the regulation of the wastegate valve 24 independent of operating point-dependent pressures, only by the resulting, very small compressed air volume due to the integrated in the suction tube 36 WL-LLK, without a deterioration of the dynamics at load request from lower Part load when opened there Wastegateventil 24 must be taken into account, in which the entire compressed air volume is at a much lower pressure level than conventional pneumatic actuators, but also cause a 1 -2% higher fuel consumption.
• the dynamic behavior is indeed improved at least to the level of pneumatic actuators, but this is the consumption in the entire map area in an undesirable manner on the worse level of the pneumatic wastegate actuators.
• wastegate valve 24 With open at partial load wastegate valve 24, which represents the desired state, since the primary motivation for the use of an electric wastegate actuator 26, the reduction consumption, can be through the use of an electric wastegate actuator 26 improve both the dynamics and the consumption, because by the combination of integrated in the intake manifold 36 LLK and electric wastegate actuator 26, the consumption can be improved without a disadvantage. to suffer the dynamic behavior. This also provides the opportunity to provide the wastegate valve 24 according to purely motor, thermodynamic criteria. This results in the characteristic diagram according to FIG. 2. With the operating strategy of an electric wastegate actuator 24 shown here, the advantages of the electrical control are maximized. The prerequisite for the implementation of this map as shown in FIG. 2 is integrated in the intake manifold 36 WL-LLK.
• electrical wastegate actuator 26 means an actuator that directly converts an electrical output signal of a motor control device by means of an electric motor into the desired setting movement of the wastegate valve or the wastegate flap. This means independence of operating point-dependent supply pressures of the engine.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Supercharger (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=40200725

Family Applications (1)

Country Status (6)

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Citations (15)

Family Cites Families (20)

• 2007
  • 2007-10-29 DE DE102007051505A patent/DE102007051505A1/de not_active Ceased
• 2008
  • 2008-09-20 CN CN200880114657.3A patent/CN101842565B/zh active Active
  • 2008-09-20 WO PCT/EP2008/007948 patent/WO2009056197A1/de active Application Filing
  • 2008-09-20 EP EP08802450A patent/EP2205841A1/de not_active Ceased
  • 2008-09-20 JP JP2010531430A patent/JP2011501043A/ja active Pending
• 2010
  • 2010-04-28 US US12/769,620 patent/US8051842B2/en active Active

Patent Citations (15)

Non-Patent Citations (1)

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