Classifications

• • 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
  • F02M26/65—Constructional details of EGR valves
  • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
  • F01N13/08—Other arrangements or adaptations of exhaust conduits
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
  • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
  • F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
• • 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
• • 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
  • F02M26/65—Constructional details of EGR valves
  • F02M26/72—Housings
  • F02M26/73—Housings with means for heating or cooling the EGR valve
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
  • F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
  • F01N2260/02—Exhaust treating devices having provisions not otherwise provided for for cooling the device
  • F01N2260/024—Exhaust treating devices having provisions not otherwise provided for for cooling the device using a liquid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
  • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
  • F01N2390/00—Arrangements for controlling or regulating exhaust apparatus
  • F01N2390/02—Arrangements for controlling or regulating exhaust apparatus using electric components only
• • 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
  • F02M26/52—Systems for actuating EGR valves
  • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
  • F02M26/54—Rotary actuators, e.g. step motors
• • 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 exhaust valve device for an internal combustion engine having a valve housing in which a flow-through exhaust gas channel is formed, an exhaust valve, which is rotatably disposed in the exhaust passage and mounted in the valve body, an actuator with an actuator housing and an electric motor, via which the exhaust valve driven is and a coolant channel, which is formed in the valve body and the exhaust valve at least partially surrounds.
• Such exhaust valve devices can be used in the field of exhaust gas recirculation, heat recovery or as exhaust brakes for differential pressure increase. Due to the high temperatures occurring special demands are placed on these exhaust valve devices in order to ensure a functional safety. In this case, both the valve body itself or its storage for this thermal load interpreted as well as the actuator for driving the flap. For this reason, either temperature insensitive actuator such as vacuum plate are often used to drive such flaps or the actuator is arranged at a sufficient distance from the hot exhaust gas. In addition, thermally highly resilient bearings, such as meadow ceramic bearings used to support the valve shaft.
• Valve housing is cooled and the actuator is thermally separated from the valve body.
• DE 602 08 832 T2 describes an exhaust gas recirculation device in which a flap body is arranged in front of a heat exchanger for controlling the exhaust gas flow.
• a coolant jacket is arranged, which is in fluid communication with the coolant jacket of the heat exchanger via a coolant pipe.
• the actuator of the flap is attached to the outside of the housing and thermally separated by the coolant jacket from the exhaust passage.
• EP 1 420 158 A2 discloses an exhaust gas recirculation device in which an electric motor and a flap driven by the electric motor are arranged in a common housing.
• the flap is surrounded by a coolant channel, wherein one of the coolant channels is arranged between the flap and the electric motor.
• an exhaust valve device with the features of the main claim. Characterized in that the coolant channel has a direct fluidic connection to a coolant channel in the actuator housing in the valve body, a closed circuit of the coolant is produced, whereby not only the flaps, or bearings in the valve body, but also directly the electric motor or the control unit of the actuator are cooled. This is due to the immediate connection without additional piping, so that the assembly cost is minimized.
• a coolant inlet of the actuator housing are connected to a first coolant outlet of the valve housing and a first coolant inlet of the valve housing to a coolant outlet of the actuator housing. Accordingly, a flow from the valve body in the actuator housing and back to the valve body. Accordingly, no connecting lines or inlet and outlet nozzles are to be fastened to the actuator housing.
• the actuator housing is fastened to the flap housing via a flange connection, so that not only the mechanical attachment of the actuator to the exhaust flap housing is performed by the flange mounting, but at the same time the fluidic connection of the two coolant channels is made.
• a partition wall of the valve body between the first coolant inlet of the flap housing and the first coolant outlet formed a partition wall of the valve body.
• the partition will extend either in the axial direction or in the circumferential direction. A flow into the actuator housing is ensured in this way, since a short-circuit flow is prevented from the inlet to the outlet of the valve body.
• the coolant channel in the valve housing on power guide walls for positive guidance of the coolant.
• These walls are arranged so that as far as possible a channel with uniform flow resistance is formed, which surrounds the entire flap and must be flowed through completely from the inlet in the flap housing to the outlet and via the actuator housing.
• the current-carrying walls are correspondingly arranged in the axial direction of the valve housing to each other such that the coolant flow is forcibly guided in an alternating direction parallel to the channel axis along the circumference of the valve housing.
• This can be realized, for example, in that, along the axial length of the flap housing, the axially extending partitions, viewed circumferentially, are alternately made shorter on the opposite sides, so that an overflow of the coolant into the adjacent channel becomes possible at these positions.
• the solid partitions are closed by an attached housing part.
• the coolant channel runs in the actuator housing along a rear wall of the electronic control unit and surrounds the electric motor at least partially, whereby a sufficient active cooling of both the windings and the power transistors of the drive circuit is ensured. An overload of these components is correspondingly largely excluded.
• the coolant channel extends in a spiral manner in the valve housing, since this produces an approximately uniform cooling of the housing over the circumference.
• the coolant channel in the valve body on a direct fluidic connection to a coolant channel, which is formed in a heat exchanger housing, so that a structural unit of heat exchanger, flap and actuator is formed, which is constructed without additional connecting pipes and a common coolant circuit having. Accordingly, a single coolant inlet port and a single coolant outlet port suffice for producing a coolant flow through all three aggregates.
• a second coolant inlet of the flap housing is connected to a coolant outlet of the heat exchanger housing and a coolant inlet of the heat exchanger housing is connected to a second coolant outlet of the flap housing. Accordingly, a flow of coolant from the heat exchanger via the valve body to the actuator housing and back, without the need for external piping may arise.
• a partition wall is formed for safe prevention of a short-circuit flow between the second coolant inlet of the flap housing and the second coolant outlet of the flap housing. Accordingly, a sufficient flow through the valve body is ensured.
• an exhaust valve apparatus which has a long service life, since a continuous withdrawal of heat by ensuring a flow of coolant in the valve body and in the actuator housing is made possible.
• the necessary assembly costs are kept very low, so that additional costs are avoided.
• significantly less expensive materials can be used, as a sufficient cooling is ensured without additional interfaces.
• Figure 1 shows a front view of an exhaust valve device according to the invention in a sectional view.
• FIG. 2 shows a detail of a side view of the exhaust valve device according to the invention from FIG. 1 in a sectional representation.
• FIG. 3 shows a side view of the exhaust valve device according to the invention from FIG. 1 in plan view.
• the exhaust flap device shown in the figures consists of a flap housing 10 through which an exhaust gas flowed through channel 12 is radially limited, in which an exhaust valve 14 is disposed, the exhaust flap 14 consists of a valve body 16 and a shaft 18 on which the flap body 16th is attached.
• the shaft 18 is rotatably supported by two on opposite sides of the exhaust passage 12 in the valve housing 10. o
• the shaft 18 protrudes from the flap housing 10 on one side.
• an eccentric 22 is fixed to the end of the shaft 18, on the second axis 20, a lever 24 is rotatably mounted, whose opposite end is rotatably mounted on a second eccentric 26, whose axis of rotation by a drive shaft 27 of an actuator
• the actuator 28 has an electric motor 32 arranged in an actuator housing 30, which is controlled via an electronic control unit 34, which is arranged in a space 36 in the actuator housing 30, which is closed by a cover 38.
• the flap body 16 can be rotated by means of the mechanical coupling via the eccentric 22, 26 and the lever 24 and the shaft 18 with appropriate control of the electric motor 32 in order to regulate the flow cross-section and thus the exhaust gas flow in the exhaust passage 12 ,
• the electric motor 32 or the transmission linkage 22, 24, 26 is biased in the opening direction of the exhaust valve 14 return spring 40 wound around the shaft 18, so that in case of failure of one of the units Exhaust flap 14 is rotated by the spring force in your cross-section releasing Notlaufposition.
• coolant channels 42 are formed in the flap housing 10 and coolant channels 44 are formed in the actuator housing 30, which are fluidically connected directly, in the present exemplary embodiment, via a flange connection 46.
• the coolant channel 44 in the actuator housing 30 also has a dividing wall 64 between the coolant inlet 56 and the coolant outlet 60.
• the partition 64 is formed in the actuator housing 30, but it is a positively driven flow ensured by the coolant passage 44 in the actuator housing 30 at least a first channel portion 66, in which the coolant flows from the coolant inlet 56 and which the electric motor 32 at least partially surrounds and a second channel portion 68, in which the coolant from the first channel portion 66 and from which subsequently the coolant flows to the coolant outlet 60.
• This channel section 68 leads along a rear wall 70 of the control unit 34, so that these too are actively cooled.
• the coolant channel 42 in the valve housing 10 is formed so that dead water areas are prevented by a positive guidance means flow guide walls 72.
• flow guide walls 72 extend parallel to the channel axis and are distributed over the circumference of the exhaust passage 12, advantageously so that there is an approximately constant flow resistance and thus pressure loss.
• the flow guide walls 72 each extend in the circumferential direction alternately to the end or ends spaced from the axial end of the valve housing 10. It follows that when fastening the valve body 10 on further tubular housings via flanges of the coolant channel 42 axially closed becomes. In this case, a deflection of the coolant flow in the adjacent coolant part channel is possible in each case where the flow guide wall 72 ends axially in front of the end of the valve housing 10. This creates a flow with alternating axial flow direction, which progresses over the circumference.
• a flap housing 10 is connected directly to a heat exchanger housing 76 of a heat exchanger 78 used as an exhaust gas cooler.
• This attachment is also designed as a flange connection 80, by means of which a fluidic connection of a coolant channel 82 of the heat exchanger 78 to the coolant channel 42 of the flap housing 10 is produced.
• the flap housing 10 has a second coolant inlet 84 which is connected to a coolant outlet 86 of the heat exchanger housing 76 and a second coolant outlet 88, which is connected to a coolant inlet 90 of the heat exchanger housing 76.
• these exhaust valve devices according to the invention are continuously active both in the area in which the thermal stress arises as well as in the areas to be protected from thermal overload, ie at the bearings, the electric motor and the electronics cooled.
• This active cooling takes place via the cooling system of the internal combustion engine, so that it is possible to dispense with additional connecting lines and pipe connections. Due to the existing positive guidance of the coolant over all aggregates thermal spikes are avoided by dead water areas. The heat is dissipated so continuously, so that the life is increased.
• the scope of the present main claim is not limited to the described embodiments.
• the coupling between the actuator and the flap done in other ways, for example by a transmission.
• the coolant inlet and outlet can be arranged differently to each other, for example, be offset radially to each other instead of axially. In this case, the partitions would extend differently in the coolant channel to avoid a short circuit flow. Another forced flow guidance is certainly conceivable.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Exhaust Silencers (AREA)
• Electrically Driven Valve-Operating Means (AREA)
• Mechanically-Actuated Valves (AREA)
• Multiple-Way Valves (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=47913400

Family Applications (1)

Country Status (6)

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Citations (1)

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• 2012
  • 2012-04-18 DE DE201210103374 patent/DE102012103374B4/de active Active
• 2013
  • 2013-03-15 WO PCT/EP2013/055422 patent/WO2013156221A1/de active Application Filing
  • 2013-03-15 CN CN201380015678.0A patent/CN104169560B/zh active Active
  • 2013-03-15 EP EP13711009.4A patent/EP2839139A1/de not_active Withdrawn
  • 2013-03-15 IN IN7160DEN2014 patent/IN2014DN07160A/en unknown
  • 2013-03-15 US US14/395,064 patent/US9464602B2/en active Active

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Non-Patent Citations (1)

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