WO2014080501A1 - 電動機付き過給機および電動機付き過給機を備えるエンジン装置 - Google Patents
電動機付き過給機および電動機付き過給機を備えるエンジン装置 Download PDFInfo
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- WO2014080501A1 WO2014080501A1 PCT/JP2012/080367 JP2012080367W WO2014080501A1 WO 2014080501 A1 WO2014080501 A1 WO 2014080501A1 JP 2012080367 W JP2012080367 W JP 2012080367W WO 2014080501 A1 WO2014080501 A1 WO 2014080501A1
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- supercharger
- electric motor
- engine
- cooling
- motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
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- 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
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- 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
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- 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
- F02B39/005—Cooling of pump drives
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- 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
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- 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
- F02B39/14—Lubrication of pumps; Safety measures therefor
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- 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
- F02M26/03—EGR systems specially adapted for supercharged engines with a single mechanically or electrically driven intake charge compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/059—Roller bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
- F01D25/125—Cooling of bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/007—Cooling of bearings of rolling bearings
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- 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 disclosure relates to a supercharger with an electric motor that rotates a rotary shaft by an electric motor and supercharges intake gas supplied to the engine by a compressor wheel fixed to one end of the rotary shaft, and an engine device including the supercharger with an electric motor.
- an exhaust turbine is driven by exhaust gas exhausted from the engine, and thereby a compressor disposed in an intake passage is driven coaxially to supply intake air to the engine. “Supercharging” is performed to compress gas.
- a response delay at the time of engine low speed rotation called a turbo lag becomes a problem.
- a two-stage turbocharging system including a turbocharger driven by exhaust gas and an electric supercharger driven by an electric motor is known.
- An electric assist turbo is also known in which an electric motor is attached to a turbocharger and the electric motor is operated to drive a compressor during low-speed rotation so as to eliminate the turbo lag (Patent Document 1).
- a supercharger configured to be able to drive a compressor by an electric motor
- This supercharger with an electric motor is not provided with an exhaust turbine, and an “electric supercharger” in which a compressor is driven only by the electric motor, and an “electric motor” in which the compressor is driven by driving an exhaust turbine in addition to the electric motor.
- Assist Turbo is not provided with an exhaust turbine, and an “electric supercharger” in which a compressor is driven only by the electric motor, and an “electric motor” in which the compressor is driven by driving an exhaust turbine in addition to the electric motor.
- the inventors of the present invention are arranged in the vicinity of the compressor wheel when a high temperature deterioration of the grease is caused to recirculate a part of the exhaust gas upstream from the supercharger with an electric motor in an engine device equipped with EGR. It has been found that this is particularly problematic for bearings.
- At least one embodiment of the present invention has been made in view of the problems of the prior art as described above, and the object is to adopt a grease lubrication system as a bearing lubrication system.
- An object of the present invention is to provide a supercharger with an electric motor with improved cooling performance and an engine device including the supercharger with an electric motor.
- At least one embodiment of the supercharger with an electric motor of the present invention includes: A rotation axis; A compressor wheel fixed to one end of the rotating shaft; A compressor housing that houses the compressor wheel; An electric motor including a motor rotor fixed to the rotating shaft and a motor stator disposed around the motor rotor, and applying a rotational force to the rotating shaft; A motor housing that houses the electric motor; A first grease-filled bearing that rotatably supports the rotating shaft; A turbocharger with an electric motor comprising: the first grease-sealed bearing; and a bearing housing disposed between the compressor housing and the motor housing, A cooling passage through which a cooling medium flows is provided in the bearing housing in the circumferential direction on the outer peripheral side of the first grease-sealed bearing.
- a cooling passage extending in the circumferential direction is provided inside the bearing housing at a position on the outer peripheral side of the first grease-filled bearing. For this reason, the first grease-filled bearing can be effectively cooled by flowing a cooling medium such as air directly obtained from the atmosphere, intake gas in the intake passage of the engine, or water into the cooling passage.
- the rotating shaft is configured to be applied with a rotational force by driving an exhaust turbine in addition to the electric motor.
- the supercharger with an electric motor of the present invention may be an “electrically assisted turbo” in which the compressor is driven not only by the electric motor but also by driving the exhaust turbine.
- the motor housing accommodates a second grease-filled bearing disposed on the opposite side of the first grease-filled bearing with the motor rotor interposed therebetween and rotatably supporting the rotating shaft.
- the rotary shaft is supported by two bearings, and the rotary shaft can be stably supported with low frictional resistance.
- the cooling medium is made of a gas.
- the bearing is cooled by a so-called air cooling method, the supercharger with an electric motor can be cooled with a simple configuration.
- a fin portion protruding to the outer peripheral side is provided on the inner peripheral surface of the cooling passage.
- the cooling medium is a liquid.
- a motor side cooling passage through which a cooling medium flows is provided inside the motor housing, and the motor side cooling passage and the cooling passage are connected so as to allow water to pass therethrough.
- the first grease-filled bearing housed in the bearing housing, the electric motor, the coil, the second grease-filled bearing, etc. housed in the motor housing are separated from the cooling passage and the motor side cooling passage. It can be cooled by one cooling medium path.
- At least one embodiment of the engine device of the present invention is: An engine device comprising the supercharger with an electric motor according to any one of claims 1 to 6, Engine, A turbocharger driven by exhaust gas discharged from the engine, The intake gas compressed by the turbocharger is supplied to a compressor wheel of the supercharger with electric motor.
- Such an engine device is a so-called two-stage supercharging system in which intake gas supercharged by a turbocharger is supplied to a compressor wheel of a supercharger with an electric motor. It is configured as a machine.
- a supercharger with an electric motor as a high-pressure supercharger of a two-stage supercharging system
- the intake gas compressed in the high-pressure stage becomes even higher, so the vicinity of the compressor wheel of the supercharger with an electric motor
- the first grease-sealed bearing arranged in is easily susceptible to the thermal influence of the high-temperature intake gas.
- the supercharger with an electric motor according to the present embodiment has a cooling passage for the first grease-filled bearing disposed in the vicinity of the compressor wheel because the cooling passage through which the cooling medium flows is provided inside the bearing housing. Is excellent.
- the engine device of the present embodiment is particularly preferably used when the supercharger with an electric motor is used as a high-pressure stage supercharger of a two-stage supercharging system.
- At least one embodiment of the engine device of the present invention is: An engine device comprising the supercharger with an electric motor according to claim 3 or 4, Engine, A turbocharger driven by exhaust gas discharged from the engine, The intake gas compressed by the turbocharger is configured to be supplied to the compressor wheel of the supercharger with electric motor, The cooling medium flowing through the cooling passage is composed of intake gas or air supplied to the engine.
- such an engine device is preferably used when the supercharger with an electric motor is used as a high-pressure stage supercharger of a two-stage supercharging system. Moreover, since the cooling medium flowing through the cooling passage is composed of intake gas or air supplied to the engine, the cooling medium can be efficiently supplied to the cooling passage.
- the cooling medium flowing through the cooling passage is made up of intake gas introduced from outside the engine device and compressed by the turbocharger.
- the cooling effect is excellent.
- At least one embodiment of the engine device of the present invention is: An engine device comprising the supercharger with an electric motor according to claim 5 or 6, Engine, A turbocharger driven by exhaust gas discharged from the engine, The intake gas compressed by the turbocharger is configured to be supplied to the compressor wheel of the supercharger with electric motor, The cooling medium flowing through the cooling passage is made of cooling water.
- such an engine device is preferably used when the supercharger with an electric motor is used as a high-pressure stage supercharger of a two-stage supercharging system.
- the cooling medium which flows through a cooling channel consists of cooling water, and is excellent in the cooling effect.
- An intercooler that cools the intake gas supplied to the engine with cooling water is further provided, and a cooling medium that flows through the cooling passage is formed of cooling water used in the intercooler.
- the cooling medium flowing in the cooling passage is composed of the cooling water introduced from the intercooler, and the cooling system in the engine device is simplified by effectively using the cooling water used in the intercooler. I can do it.
- a cooling system for supplying cooling water to the cooling passage may be added separately when there is no allowance for the amount of cooling water used in the intercooler.
- At least one embodiment of the engine device of the present invention is: An engine device comprising the supercharger with an electric motor according to any one of claims 1 to 11, Engine, An EGR device that recirculates a part of the exhaust gas discharged from the engine to the intake passage of the engine, The intake gas including the exhaust gas recirculated by the EGR device is configured to be supplied to a compressor wheel of the supercharger with an electric motor.
- the first grease-filled bearing disposed in the vicinity of the compressor wheel of the supercharger with an electric motor has a particularly high temperature of the intake gas. It becomes easy to be affected by heat.
- the cooling passage through which the cooling medium flows is provided in the bearing housing, the first grease arranged in the vicinity of the compressor wheel. Excellent cooling performance for sealed bearings.
- the engine device of the present embodiment is particularly preferably used when the supercharger with an electric motor is used as a supercharger of an engine device with an EGR device.
- a supercharger with an electric motor and a supercharger with an electric motor having improved cooling performance of the bearing are provided. Can be provided.
- FIG. 1 is a partially cutaway side view showing an electric supercharger according to an embodiment of a supercharger with an electric motor of the present invention.
- FIG. 2 is a cross-sectional view taken along line AA in FIG. It is a partial side view of the electric supercharger of FIG. It is a partial expanded sectional view of the electric supercharger of FIG.
- FIG. 7 is a partially cutaway side view of the electric supercharger according to the embodiment of the supercharger with electric motor of the present invention at a position corresponding to line CC in FIG. 6. It is the schematic diagram which showed the flow of the cooling medium in embodiment of FIG. 5A. It is sectional drawing in the BB line of FIG. 5A. It is a partial expanded sectional view of the electric supercharger of Drawing 5A.
- FIG. 1 is a system configuration diagram of an engine device when an electric supercharger according to an embodiment of the present invention is used as a low-pressure supercharger of a two-stage supercharging system, before being compressed by the low-pressure supercharger. It is the figure which showed the case where intake gas is used as a cooling medium.
- 1 is a system configuration diagram of an engine device when an electric supercharger according to an embodiment of the present invention is used as a low-pressure supercharger of a two-stage supercharging system, and shows a case where cooling water is used as a cooling medium.
- FIG. 1 is a partially cutaway side view showing an electric supercharger according to an embodiment of a supercharger with an electric motor of the present invention.
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- FIG. 3 is a partial side view of the electric supercharger of FIG. 4 is a partially enlarged sectional view of the electric supercharger of FIG.
- the electric supercharger 1a of the present embodiment is configured to supercharge intake gas supplied to the engine by a compressor wheel 10 fixed to one end of the rotating shaft 12. As shown in FIG. 1, the electric supercharger 1a is fastened by a compressor housing 2 that houses the compressor wheel 10, a bearing housing 4a fastened by the compressor housing 2 and the bolt 13a, and a bearing housing 4a and the bolt 13b. Motor housing 6a. The bearing housing 4 a is disposed between the motor housing 6 a and the compressor housing 2.
- the bearing housing 4a accommodates the first rolling bearing 20A that rotatably supports the rotary shaft 12.
- the rolling bearing 20A of the present embodiment is held by an inner ring 20c and an outer ring 20d arranged concentrically and a cage 20b arranged between the inner ring 20c and the outer ring 20d as shown in an enlarged view in FIG. It is configured as a grease lubrication type bearing 20A (first grease-enclosed rolling bearing 20A) in which grease is enclosed as a lubricant at least around the rolling element 20a.
- a bearing sleeve 28 is disposed on the outer periphery of the first grease-filled rolling bearing 20A.
- the first grease-filled rolling bearing 20A is disposed at a position close to the compressor wheel 10 via the sleeve members 24a and 24b. For this reason, the first grease-filled rolling bearing 20 ⁇ / b> A is susceptible to the thermal influence of the high-temperature intake gas compressed by the compressor wheel 10.
- the motor housing 6a includes at least an electric motor 15 including a motor rotor 14 and a motor stator 16, and a second grease-enclosed rolling bearing that rotatably supports the rotary shaft 12 together with the first grease-enclosed rolling bearing 20A described above. 20B. Further, an inverter accommodating portion 8 for accommodating the inverter is integrally provided at the rear end portion of the motor housing 6a.
- the motor rotor 14 is fixed to the rotary shaft 12.
- the motor stator 16 is disposed around a motor rotor 14 fixed to the rotary shaft 12.
- a rotational moment is generated by the interaction between the motor rotor 14 and the motor stator 16, and a rotational force is applied to the rotary shaft 12.
- the inverter mentioned above is comprised so that the rotational speed of the electric motor 15 may be controlled by changing into the alternating current the electric current supplied from a power supply, and changing a voltage and a frequency arbitrarily.
- the second grease-filled rolling bearing 20B has the same configuration as the first grease-filled rolling bearing 20A described above. And it is located in the other side on both sides of the motor rotor 14 of 20 A of 1st grease enclosure rolling bearings.
- the electric supercharger 1a of this embodiment is comprised as a double-sided structure which supports the rotating shaft 12 with the two bearings 20A and 20B, and the rotating shaft 12 is stably supported with a low frictional resistance.
- a plurality of heat radiating fins 38 are provided on the outer peripheral surface of the motor housing 6a. Then, by applying wind to the plurality of radiating fins 38, the coil and the motor 15 housed in the motor housing 6a, the second grease-enclosed rolling bearing 20B disposed in the vicinity thereof, and the like are cooled.
- a cooling passage 18a through which a cooling medium made of a gas such as air flows is formed in the above-described bearing housing 4a at a position on the outer peripheral side of the first grease-filled rolling bearing 20A.
- the cooling passage 18 a extends in the circumferential direction with respect to the rotating shaft 12.
- a plurality of vent holes 17 are opened in the circumferential direction on the outer peripheral surface of the bearing housing 4a. Each vent 17 communicates with the cooling passage 18a.
- a cooling medium such as air or low-temperature intake gas is supplied to or discharged from the cooling passage 18a through the vent hole 17.
- a rib 11a which is a strength member for supporting the central portion of the bearing housing, extends in the radial direction inside the bearing housing 4a.
- the rib 11a is formed with a predetermined length in the axial direction, whereby the cooling passage 18a is vertically divided into two.
- cooling passage 18a is not necessarily divided by the rib 11a.
- the rib 11a is not provided in the axial front-rear position of the AA cross section, and the cooling passage 18a may be formed in an annular shape.
- fin portions 22 that protrude toward the outer peripheral side are provided on the inner peripheral surface of the cooling passage 18 a.
- the heat transfer area of the inner peripheral surface of the cooling passage 18a is increased, and the cooling efficiency is improved. What is necessary is just to determine suitably the installation number of the fin part 22 according to the space etc. of the cooling channel
- the protruding height of the fin portion 22 may be set as appropriate so that the flow of the cooling medium flowing through the cooling passage 18a is not hindered.
- one fin portion 22 is provided so as to extend along the entire circumference of the inner peripheral surface of the cooling passage 18a.
- the cooling passage 18a extending in the circumferential direction at a position on the outer peripheral side of the first grease-filled rolling bearing 20A inside the bearing housing 4a. Is provided. For this reason, by flowing a cooling medium such as air or low-temperature intake gas through the cooling passage 18a, the first grease-filled rolling bearing 20A affected by the heat of the high-temperature intake gas can be effectively cooled. It has become.
- FIG. 5A is an electric supercharger according to an embodiment of the supercharger with electric motor of the present invention, and is a partially cutaway side view of the position corresponding to the line CC in FIG.
- FIG. 5B is a schematic diagram showing the flow of the cooling medium in the embodiment of FIG. 5A.
- 6 is a cross-sectional view taken along the line BB of FIG. 5A.
- FIG. 7 is a partially enlarged cross-sectional view of the electric supercharger of FIG. 5A.
- the electric supercharger 1b of the present embodiment has basically the same configuration as the electric supercharger 1a of the above-described embodiment, and the same reference numerals are given to the same structural members, and the detailed description thereof is omitted. Description is omitted.
- the cooling medium flowing through the cooling passage 18a is configured as a gas such as air or intake gas.
- the point that the cooling medium flowing through the cooling passage 18b is a liquid such as water is greatly different from the above-described embodiment. .
- a cooling passage 18b through which a cooling medium made of a liquid such as water flows is formed inside the bearing housing 4b.
- the cooling passage 18b is formed at a position on the outer peripheral side of the first grease-filled rolling bearing 20A, similarly to the cooling passage 18a of the above-described embodiment.
- the rotation shaft 12 is provided so as to extend in the circumferential direction.
- the cooling passage 18b is not provided with the fin portion 22 on the inner peripheral surface thereof.
- the cooling passage 18b is divided into left and right parts by the rib 11b.
- the rib 11b is not provided in the front and rear cross-sections of the BB cross section. 18b is formed in an annular shape.
- the radiating fins 38 are not provided on the outer peripheral side. Instead, a motor side cooling passage 30 through which water as a cooling medium flows is formed in the motor housing 6b.
- the motor side cooling passage 30 is provided extending in the circumferential direction at a position on the outer peripheral side of the motor stator 16. And it connects to the cooling passage 18b of the bearing housing 4b mentioned above via the connection passage 34.
- a water passage 32 is provided on the outer peripheral surface of the motor housing 6b to communicate the outside with the motor side cooling passage 30.
- the water flow hole 36 which connects the exterior and the cooling passage 18b is provided in the outer peripheral surface of the bearing housing 4b.
- the supplied water circulates through the cooling passage 18b as schematically shown in FIG. 5B, so that the inner peripheral side of the cooling passage 18b.
- the first grease-filled rolling bearing 20 ⁇ / b> A disposed in is cooled.
- the water circulated through the cooling passage 18 b is supplied to the motor side cooling passage 30 via the connection passage 34.
- the supplied water circulates through the motor-side cooling passage 30 to cool the coil, the electric motor 15 and the like housed in the motor housing 6b. Further, the water circulated through the motor side cooling passage 30 is discharged from the water passage 32 to the outside as shown in FIG. 5A.
- the water circulation direction described above is not particularly limited. When the amount of heat generated on the motor side is large, it is needless to say that water may be supplied from the water passage 32 and discharged from the water passage 36 in the direction opposite to the above-described circulation direction. .
- the electric supercharger 1b of the present embodiment configured as described above, inside the bearing housing 4b that houses the first grease-enclosed rolling bearing 20A, in the circumferential direction on the outer peripheral side of the first grease-enclosed rolling bearing 20A.
- An extending cooling passage 18b is provided inside the bearing housing 4b that houses the first grease-enclosed rolling bearing 20A. Therefore, by flowing a cooling medium such as water through the cooling passage, the first grease-filled rolling bearing 20A that is affected by the heat of the high-temperature intake gas can be effectively cooled.
- the first grease-filled rolling bearing 20A housed in the bearing housing 4b, the coil, the motor 15, and the second grease-filled rolling bearing 20B housed in the motor housing 6b. are cooled by one cooling medium path including the motor side cooling path 30, the connection path 34, and the cooling path 18b. For this reason, since supply and drainage of the cooling water to the cooling passage 18b and the motor side cooling passage 30 can be performed in one line, respectively, the cooling water is supplied to or drained from the cooling passage 18b and the motor side cooling passage 30, respectively. In comparison, it is possible to simply configure a cooling system for an engine device described later.
- FIGS. 8 to 12 show an embodiment of an engine device in the case where the electric superchargers 1a and 1b are used as a high-pressure stage supercharger of a two-stage supercharging system, and FIGS.
- FIG. 12 shows an embodiment in which water is used as a cooling medium.
- FIG. 8 is a system configuration diagram according to an embodiment of the engine apparatus of the present invention, and shows a case where intake gas before being compressed by a turbocharger is used as a cooling medium.
- the engine device 50a of the embodiment shown in FIG. 8 includes an engine 52, an intake passage 56 through which intake gas supplied to the engine 52 flows, an exhaust passage 54 through which exhaust gas discharged from the engine 52 flows, A turbocharger 60 and the above-described electric supercharger 1a are provided.
- the turbocharger 60 includes an exhaust turbine 64 disposed in the exhaust passage 54, a compressor 62 disposed in the intake passage 56, and a turbine shaft 63 that connects the exhaust turbine 64 and the compressor 62.
- the exhaust turbine 64 is driven by the exhaust gas discharged from the engine 52, and the compressor 62 is coaxially driven via the turbine shaft 63, so that the intake gas flowing through the intake passage 56 is supercharged. .
- a bypass exhaust passage 55 that bypasses the exhaust turbine 64 is connected to the exhaust passage 54.
- a waste gate valve 74 is disposed in the bypass exhaust passage 55. The flow rate of the exhaust gas flowing through the exhaust turbine 64 is controlled by adjusting the valve opening degree of the waste gate valve 74.
- the compressor 2A is disposed in the intake passage 56b located on the downstream side of the compressor 62.
- the intake gas compressed by the compressor 62 of the turbocharger 60 is supplied to the compressor 2A (compressor wheel 10) of the electric supercharger 1a. That is, the engine device 50a of the present embodiment is configured as a two-stage supercharging system in which the turbocharger 60 is disposed as a low pressure supercharger and the electric supercharger 1a is disposed as a high pressure supercharger.
- a bypass intake passage 57 that bypasses the compressor 2A is connected to the intake passage 56b.
- a bypass valve 72 is disposed in the bypass intake passage 57. Then, by adjusting the valve opening degree of the bypass valve 72, the flow rate of the intake gas flowing into the compressor 2A is controlled.
- the bearing housing 4a and the motor housing 6a of the electric supercharger 1a are arranged in the intake passage 56a located on the upstream side of the compressor 62 of the turbocharger 60.
- the bearing housing 4 a and the motor housing 6 a are covered with a cover 82.
- the intake gas introduced from the outside of the engine device 50a passes through the cover 82 and flows into the intake passage 56a.
- an air cleaner 66 for cleaning intake gas introduced from the outside is arranged in the intake passage 56a.
- An intercooler 70 that cools the intake gas supplied to the engine 52 is disposed downstream of the compressor 2A in the intake passage 56b.
- the engine device 50a configured as described above is configured as a two-stage supercharging system in which the turbocharger 60 is disposed as a low pressure supercharger and the electric supercharger 1a is disposed as a high pressure supercharger. .
- the electric supercharger 1a is used as the high-pressure stage supercharger of the two-stage supercharging system, the intake gas further compressed in the high-pressure stage becomes extremely high after compression in the low-pressure stage. For this reason, the first grease-filled rolling bearing 20A arranged in the vicinity of the compressor wheel 10 of the electric supercharger 1a is in a state where it is easily affected by the high-temperature intake gas.
- the cooling passage 18a through which the cooling medium flows is provided inside the bearing housing 4a, so that the first grease is disposed in the vicinity of the compressor wheel 10. Excellent cooling performance for the rolling bearing 20A.
- the engine device 50a of the present embodiment is particularly preferably used when the electric supercharger 1a is used as a high-pressure supercharger of a two-stage supercharging system.
- the bearing housing 4a and the motor housing 6a of the electric supercharger 1a are arranged in the intake passage 56a, the cooling medium (intake gas) can be efficiently supplied to the cooling passage 18a.
- the cooling medium flowing through the cooling passage 18a is introduced from the outside of the engine device 50a and is composed of low-temperature intake gas before being compressed by the compressor 62 of the turbocharger 60, so that the cooling effect is also excellent.
- FIG. 9A is a system configuration diagram according to an embodiment of the engine apparatus of the present invention, and is a view showing an embodiment in which intake gas compressed by a turbocharger is used as a cooling medium.
- the engine device 50b of the embodiment shown in FIG. 9A basically has the same configuration as that of the above-described embodiment. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
- the bearing housing 4a and the motor housing 6a of the electric supercharger 1a are arranged on the downstream side of the compressor 62, as shown.
- the intake passage 56b located on the downstream side of the compressor 62 and the connection passages 58a and 58b are connected to each other.
- the bearing housing 4a and the motor housing 6a are covered with a cover 82, and the intake gas compressed by the compressor 62 is supplied into the cover 82 from the exhaust passage 56b through the connection passages 58a and 58b.
- the intake gas compressed by the compressor 62 is configured to flow through the cooling passage 18a of the bearing housing 4a as a cooling medium.
- the intake gas compressed by the compressor 62 of the turbocharger 60 may be used as a cooling medium. Even in this case, since the temperature of the intake gas compressed by the compressor 62 is lower than the temperature of the intake gas further compressed by the compressor 2A of the electric supercharger 1a, a constant cooling effect can be expected.
- a throttle valve 59 is disposed at a position between the connection passage 58a and the connection passage 58b of the intake passage 56, and the valve opening degree of the throttle valve 59 is adjusted.
- the intake passage 56b is directly connected to the bearing housing 4a and the motor housing 6 of the electric supercharger 1a without providing the connection passages 58a and 58b, thereby being compressed by the compressor 62. It can also be configured such that the entire amount of intake gas is used as a cooling medium.
- FIG. 10 is a system configuration diagram according to an embodiment of the engine apparatus of the present invention, and is a view showing an embodiment when the electric supercharger and the air cleaner are arranged so as to be covered with the same cover.
- the engine apparatus 50c of the embodiment shown in FIG. 10 has basically the same configuration as that of the above-described embodiment. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
- the electric supercharger 1a and the air cleaner 66 are covered by a single cover 84, as shown. As indicated by an arrow i in the figure, the intake gas introduced from the outside of the engine device 50c passes through the cover 84 and then flows into the intake passage 56a.
- the engine device 50c can be configured in a compact manner.
- FIG. 11 is a system configuration diagram according to an embodiment of the engine apparatus of the present invention, and shows an embodiment in which air is used as a cooling medium.
- the engine device 50d of the embodiment shown in FIG. 11 has basically the same configuration as that of the above-described embodiment. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
- the entire electric supercharger 1a is covered with a cover 86, as shown.
- a fan 88 is attached to the cover 86. Then, as the fan 88 rotates, the air in the cover 86 is discharged to the outside as shown by the arrow e in the figure, and accordingly, the cover from the outside is shown as shown by the arrow a in the figure. The air is supplied into the 86.
- the cooling medium (air) is forcibly supplied to the cooling passage 18a by the fan 88, restrictions on the arrangement of the electric supercharger 1a are reduced, and the degree of freedom in the layout of the engine device 50d is reduced. improves.
- the cooling medium flowing through the cooling passage 18a is composed of low-temperature air introduced from the outside of the engine device 50a, the cooling effect is also excellent.
- FIG. 12 is a system configuration diagram according to an embodiment of the engine apparatus of the present invention, and is a view showing an embodiment in the case where cooling water used in an intercooler is used as a cooling medium.
- the engine device 50e of the embodiment shown in FIG. 12 has basically the same configuration as that of the above-described embodiment. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
- the intercooler 70 and the electric supercharger 1b are connected via the water supply pipes 90 and 92, as shown. Then, the cooling water of the intercooler 70 is supplied to the water passage 32 formed in the motor housing 6b through the water supply pipe 90. Further, the cooling water circulated through the motor-side cooling passage 30 and the cooling passage 18b described above is supplied to the intercooler 70 from the water passage hole 36 formed in the bearing housing 4b through the water supply pipe 92. It is configured.
- the cooling medium flowing through the cooling passage 18b of the electric supercharger 1b is composed of the cooling water introduced from the intercooler 70, and the cooling water used in the intercooler 70 can be used effectively.
- the cooling system in the engine device 50e can be configured simply.
- FIG. 13 and FIG. 14 are system configuration diagrams of the engine apparatus according to the embodiment of the present invention, and are diagrams illustrating an example of the engine apparatus provided with the EGR device.
- FIG. 13 shows an example of an engine device of a single-stage supercharging system provided with an EGR device
- FIG. 14 shows an example of an engine device of a two-stage supercharging system provided with an EGR device.
- the engine devices 50f and 50g of the embodiment shown in FIGS. 13 and 14 basically have the same configuration as that of the above-described embodiment. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
- 13 and 14 includes an EGR device 77 including an EGR valve 75 and an EGR pipe 76, as shown.
- the point that the EGR device 77 is configured to recirculate part of the exhaust gas discharged from the engine 52 to the intake passage 56b is different from the above-described embodiment.
- the EGR pipe 76 connects the exhaust passage 54 and the intake passage 56b on the upstream side of the compressor 2A of the supercharger with electric motor 1b. Then, by adjusting the valve opening of the EGR valve 75, the exhaust gas having a flow rate corresponding to the valve opening returns to the intake passage 56b. The intake gas including the recirculated exhaust gas is supplied to the compressor wheel 10 of the supercharger with electric motor 1b.
- the intake gas including the recirculated exhaust gas is further heated by mixing the high-temperature exhaust gas.
- the first grease-filled rolling bearing 20A disposed in the vicinity of the compressor wheel 10 of the supercharger with electric motor 1b is particularly susceptible to the thermal influence of high-temperature intake gas.
- the supercharger with electric motor 1b of the present embodiment is disposed in the vicinity of the compressor wheel 10 because the cooling passage 18b through which the cooling medium flows is provided in the bearing housing 4b.
- the cooling performance for the first grease-filled rolling bearing 20A is excellent.
- the above-described supercharger with electric motor 1b is particularly preferably used in the engine devices 50g and 50f of the present embodiment including the EGR device 77.
- the engine apparatus including the water-cooled supercharger with electric motor 1b using cooling water as a cooling medium has been described as an example.
- the present invention is not limited to this, and the supercharger with an air-cooled electric motor is used. You may apply to the engine apparatus provided with the machine 1a.
- the case of the electric supercharger in which the compressor is driven only by the electric motor has been described as an example of the supercharger with electric motor of the present invention.
- the supercharger with an electric motor of the present invention is not limited to this, and may be configured as an electric assist turbo in which a compressor is driven by an exhaust turbine as well as an electric motor.
- the case where the electric supercharger according to the embodiment of the present invention is arranged as a high-pressure stage supercharger of the two-stage supercharging system has been described as an example.
- the supercharger with an electric motor of the present invention is not limited to this.
- the electric superchargers 1 a and 1 b can be arranged as a low-pressure stage supercharger of the two-stage supercharging system.
- the grease lubrication type rolling bearing (first grease-filled rolling bearing 20A) is described as an example of the grease-filled bearing of the present invention.
- the grease-filled bearing of the present invention is described as an example.
- the present invention is not limited to this, and can be applied to, for example, a grease lubrication type sliding bearing.
- At least one embodiment of the present invention is particularly preferably used as a supercharger with an electric motor mounted on an engine device such as an automobile.
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Abstract
Description
回転軸と、
前記回転軸の一端部に固定されたコンプレッサホイールと、
前記コンプレッサホイールを収容するコンプレッサハウジングと、
前記回転軸に固設されたモータ回転子及び該モータ回転子の周囲に配置されたモータ固定子を含み、前記回転軸に回転力を付与する電動機と、
前記電動機を収容するモータハウジングと、
前記回転軸を回転可能に支持する第1グリース封入軸受と、
前記第1グリース封入軸受を収容し、前記コンプレッサハウジング及び前記モータハウジングの間に配置される軸受ハウジングと、を備える電動機付き過給機であって、
前記軸受ハウジングの内部には、冷却媒体が流れる冷却通路が、前記第1グリース封入軸受の外周側において周方向に設けられていることを特徴とする。
前記回転軸は、前記電動機の他に排気タービンの駆動によっても回転力が付与されるように構成されている。
前記モータハウジングは、前記第1グリース封入軸受の前記モータ回転子を挟んだ反対側に配置された、前記回転軸を回転可能に支持する第2グリース封入軸受を収容する。
前記冷却通路の内周面に、外周側に突出するフィン部が設けられている。
前記モータハウジングの内部には、冷却媒体が流れるモータ側冷却通路が設けられており、該モータ側冷却通路と前記冷却通路とが通水可能に接続されている。
請求項1から6のいずれか1項に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されていることを特徴とする。
請求項3または4に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されるとともに、
前記冷却通路を流れる冷却媒体が、前記エンジンに供給される吸気ガス、又は空気からなることを特徴とする。
前記冷却通路を流れる冷却媒体が、前記エンジン装置の外部から導入され、前記ターボチャージャで圧縮される前の吸気ガスからなる。
請求項5または6に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されるとともに、
前記冷却通路を流れる冷却媒体が冷却水からなることを特徴とする。
前記エンジンに供給される吸気ガスを冷却水により冷却するインタークーラをさらに備え、前記冷却通路を流れる冷却媒体が、前記インタークーラで用いられる冷却水からなる。
請求項1から11のいずれか1項に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスの一部を前記エンジンの吸気通路に再循環するEGR装置と、を備え、
前記EGR装置で再循環された排気ガスを含む吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されていることを特徴とする。
ただし、本発明の範囲は以下の実施形態に限定されるものではない。以下の実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、本発明の範囲をそれにのみ限定する趣旨ではなく、単なる説明例に過ぎない。
この図8に示した実施形態のエンジン装置50aは、図示したように、エンジン52、エンジン52に供給される吸気ガスが流れる吸気通路56、エンジン52から排出される排気ガスが流れる排気通路54、ターボチャージャ60、及び上述した電動過給機1a等を備えている。
このように、上述した電動機付き過給機1bは、EGR装置77を備える本実施形態のエンジン装置50g,50fにおいて、特に好適に用いられるものである。
2 コンプレッサハウジング
2A コンプレッサ
4a,4b 軸受ハウジング
6a,6b モータハウジング
8 インバータ収容部
10 コンプレッサホイール
11a,11b リブ
12 回転軸
13a,13b ボルト
14 モータ回転子
15 電動機
16 モータ固定子
18a,18b 冷却通路
20A 第1グリース封入転がり軸受
20B 第2グリース封入転がり軸受
20a 転動体
20b 保持器
20c 内輪
20d 外輪
22 フィン部
24a,24b スリーブ部材
28 軸受スリーブ
30 モータ側冷却通路
32 通水口
34 接続通路
36 通水孔
38 放熱フィン
50a~50e エンジン装置
52 エンジン
54 排気通路
55 バイパス排気通路
56 吸気通路
57 バイパス吸気通路
58 接続通路
59 絞り弁
60 ターボチャージャ
62 コンプレッサ
63 タービン軸
64 排気タービン
66 エアクリーナ
70 インタークーラ
72 バイパスバルブ
74 ウエストゲートバルブ
75 EGRバルブ
76 EGR管
77 EGR装置
82,84,86 カバー
88 ファン
90,92 送水管
Claims (13)
- 回転軸と、
前記回転軸の一端部に固定されたコンプレッサホイールと、
前記コンプレッサホイールを収容するコンプレッサハウジングと、
前記回転軸に固設されたモータ回転子及び該モータ回転子の周囲に配置されたモータ固定子を含み、前記回転軸に回転力を付与する電動機と、
前記電動機を収容するモータハウジングと、
前記回転軸を回転可能に支持する第1グリース封入軸受と、
前記第1グリース封入軸受を収容し、前記コンプレッサハウジング及び前記モータハウジングの間に配置される軸受ハウジングと、を備える電動機付き過給機であって、
前記軸受ハウジングの内部には、冷却媒体が流れる冷却通路が、前記第1グリース封入軸受の外周側において周方向に設けられていることを特徴とする電動機付き過給機。 - 前記回転軸は、前記電動機の他に排気タービンの駆動によっても回転力が付与されるように構成されていることを特徴とする請求項1に記載の電動機付き過給機。
- 前記モータハウジングは、前記第1グリース封入軸受の前記モータ回転子を挟んだ反対側に配置された、前記回転軸を回転可能に支持する第2グリース封入軸受を収容することを特徴とする請求項1または2に記載の電動機付き過給機。
- 前記冷却媒体は気体からなることを特徴とする請求項1から3のいずれか1項に記載の電動機付き過給機。
- 前記冷却通路の内周面には、外周側に突出するフィン部が設けられていることを特徴とする請求項4に記載の電動機付き過給機。
- 前記冷却媒体は液体からなることを特徴とする請求項1から3のいずれか1項に記載の電動機付き過給機。
- 前記モータハウジングの内部には、冷却媒体が流れるモータ側冷却通路が設けられており、該モータ側冷却通路と前記冷却通路とが通水可能に接続されていることを特徴とする請求項6に記載の電動機付き過給機。
- 請求項1から7のいずれか1項に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されていることを特徴とするエンジン装置。 - 請求項4または5に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されるとともに、
前記冷却通路を流れる冷却媒体が、前記エンジンに供給される吸気ガス、又は空気からなることを特徴とするエンジン装置。 - 前記冷却通路を流れる冷却媒体が、前記エンジン装置の外部から導入され、前記ターボチャージャで圧縮される前の吸気ガスからなることを特徴とする請求項9に記載のエンジン装置。
- 請求項6または7に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスによって駆動するターボチャージャと、を備え、
前記ターボチャージャで圧縮された吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されるとともに、
前記冷却通路を流れる冷却媒体が冷却水からなることを特徴とするエンジン装置。 - 前記エンジンに供給される吸気ガスを冷却水により冷却するインタークーラをさらに備え、
前記冷却通路を流れる冷却媒体が、前記インタークーラで用いられる冷却水からなることを特徴とする請求項11に記載のエンジン装置。 - 請求項1から7のいずれか1項に記載の電動機付き過給機を備えるエンジン装置であって、
エンジンと、
前記エンジンから排出される排気ガスの一部を前記エンジンの吸気通路に再循環するEGR装置と、を備え、
前記EGR装置で再循環された排気ガスを含む吸気ガスが、前記電動機付き過給機のコンプレッサホイールへと供給されるように構成されていることを特徴とするエンジン装置。
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EP12888759.3A EP2924261B1 (en) | 2012-11-22 | 2012-11-22 | Supercharger with electric motor and engine device provided with supercharger with electric motor |
JP2014501344A JP5777796B2 (ja) | 2012-11-22 | 2012-11-22 | 電動機付き過給機および電動機付き過給機を備えるエンジン装置 |
CN201280076560.4A CN104736814B (zh) | 2012-11-22 | 2012-11-22 | 带电动机的增压器和具有带电动机的增压器的发动机装置 |
US14/646,213 US10072667B2 (en) | 2012-11-22 | 2012-11-22 | Supercharger with electric motor and engine device provided with supercharger with electric motor |
PCT/JP2012/080367 WO2014080501A1 (ja) | 2012-11-22 | 2012-11-22 | 電動機付き過給機および電動機付き過給機を備えるエンジン装置 |
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