WO2015098391A1 - Exhaust gas recirculation apparatus for internal combustion engine with supercharger - Google Patents
Exhaust gas recirculation apparatus for internal combustion engine with supercharger Download PDFInfo
- Publication number
- WO2015098391A1 WO2015098391A1 PCT/JP2014/080996 JP2014080996W WO2015098391A1 WO 2015098391 A1 WO2015098391 A1 WO 2015098391A1 JP 2014080996 W JP2014080996 W JP 2014080996W WO 2015098391 A1 WO2015098391 A1 WO 2015098391A1
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- WIPO (PCT)
- Prior art keywords
- exhaust gas
- gas recirculation
- passage
- internal combustion
- combustion engine
- Prior art date
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Classifications
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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
- 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
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/34—Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
- F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
- F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
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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
- F02M26/04—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
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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
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
-
- 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
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings to the intake system
-
- 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
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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
Abstract
An exhaust gas recirculation apparatus for an internal combustion engine with a ' supercharger is provided that can guide EGR gas to an impeller blade tip that is towards the center of a compressor (55), without lowering the performance of the engine. The exhaust gas recirculation apparatus includes: a straightening vane (10) provided on an upstream side of a compressor (55) of the supercharger; a hollow-passage (11) that is provided inside the straightening vane (10) and that communicates with the EGR passage (37); and a lead-out opening (22) for EGR gas that is provided at a position that is upstream of the compressor (55) and is at the center of the intake passage, and communicates with the hollow passage (11).
Description
DESCRIPTION
Title of Invention
EXHAUST GAS RECIRCULATION APPARATUS FOR INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER
Field of the Invention
[0001] This invention relates to an exhaust gas recirculation apparatus for an internal combustion engine with a supercharger.
Background Art
[0002] An exhaust gas recirculation apparatus that introduces EGR gas from the upstream side of a compressor in an internal combustion engine with a supercharger is already known. For example, in Japanese Patent Laid-Open No. 2009-024692, technology is disclosed in which a tubular member is provided at a central part of an intake passage on an upstream side of a compressor, and EGR gas is introduced from the tubular member. When EGR gas is introduced from the tubular member, the EGR gas can be guided to an impeller blade tip that is towards the center of the compressor. Therefore, even if foreign matter such as carbon particulates, water vapor, water droplets or ice is included in the EGR gas, the foreign matter collides with a rotation center part of the impeller that is a part at which the speed in the circumferential direction of the impeller is relatively low. It is thereby possible to prevent the foreign matter from colliding with an outer circumferential portion at which the speed in the circumferential direction of the impeller is relatively high. Consequently, damage and wear of the impeller that is caused by the collision of foreign matter therewith can be suppressed.
[Citation List]
[Patent Literature]
[0003]
[Patent Literature 1]
Japanese Patent Laid-Open No. 2009-024692
[Patent Literature 2]
National Publication of International Patent Application No. 2009-524775
Summary of the Invention
[0004] However, according to the above described technology, because the tubular member is provided at the center of the intake passage, the intake pressure loss increases. There is thus a risk that the engine performance will decrease.
[0005] The present invention has been conceived to solve the above described problem, and an object of the present invention is to provide an exhaust gas recirculation apparatus for an internal combustion engine with a supercharger that can guide EGR gas to an impeller blade tip that is towards the center of a compressor, without lowering the performance of the engine.
[0006] To achieve the above described object, a first invention is an exhaust gas recirculation apparatus for an internal combustion engine with a supercharger, comprising:
a straightening vane that is provided on an upstream side of a compressor of the supercharger;
a hollow passage that is provided inside the straightening vane and that communicates with an EGR passage; and
a lead-out opening for EGR gas that is provided at a position that is at a center of an intake passage and is upstream of the compressor, and that communicates with the hollow passage.
[0007] A second invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the first invention, wherein a plurality of the straightening vanes extend radially in an outer circumferential direction of the intake passage from a hub that is arranged in a vicinity of a central tip of the compressor on an upstream side of the compressor.
[0008] A third invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the second invention, wherein the lead-out opening is formed in the hub.
[0009] A fourth invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the second invention, wherein the lead-out opening is formed in the straightening vane.
[0010] A fifth invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the third invention, wherein, in the hub, an upstream side of the intake passage is closed and a downstream side of the intake passage is opened, a hollow portion is formed that communicates with the hollow passage, and an opening portion of the hollow portion serves as a lead-out opening.
[001 1] A sixth invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the fifth invention, further comprising:
a piston that is provided inside the hollow portion and that slides to the downstream side of the intake passage;
a spring that urges the piston from the upstream side of the intake passage;
a negative pressure generating apparatus that controls a position of the piston by- means of a negative pressure; and
an introducing hole for EGR gas that is provided in the piston to adjust an EGR gas amount, and that allows the hollow passage and a hollow portion on the downstream side of the intake passage among the hollow portion that is partitioned by the piston to communicate.
[0012] A seventh invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the third or fifth invention, wherein the lead-out opening is formed in a side face of the hub.
[0013] A eighth invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the first invention, wherein the straightening vane extends in a diametrical direction of the intake passage.
[0014] A ninth invention is the exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the eighth invention, wherein the lead-out opening is formed in the straightening vane.
[0015] According to the present invention, EGR gas can be guided to a compressor shaft side of an impeller blade tip. Therefore, even if condensed water is included in the EGR gas, the EGR gas can be guided to the compressor shaft side of the impeller blade tip that is a side at which the rotational circumferential speed is slow. As a result, damage of the impeller can be prevented.
[0016]
Fig. 1 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are arranged in an intake passage according to a first embodiment;
Fig. 2 is a view for describing the overall structure of the IGV of the first embodiment; Fig. 3 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are arranged in an intake passage according to a second embodiment; Fig. 4 is a cross-sectional view of the exhaust gas recirculation apparatus in a case in which control to introduce EGR gas is performed according to a third embodiment; Fig. 5 is a cross-sectional view of the exhaust gas recirculation apparatus in a case in which control is performed so as not to introduce EGR gas according to the third embodiment;
Fig. 6 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are disposed in an intake passage according to a fourth embodiment;
Description of Embodiments
[0017] First Embodiment
[Structure of exhaust gas recirculation apparatus]
An exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to the first embodiment will be described hereunder with reference to Fig. 1 and Fig. 2.
[0018] Fig. 1 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are arranged in an intake passage according to the first embodiment. In the first embodiment, a turbocharger that utilizes exhaust air to compress intake air is adopted as the supercharger. In Fig. 1, a compressor 55 that is arranged in the intake passage is shown as one part of the supercharger. The supercharger has a structure in
which the compressor 55 that is arranged in the intake passage and a turbine (not shown) that is provided in an exhaust passage are connected through a shaft 32.
[0019] The compressor 55 is constituted by the shaft 32, an impeller 30, a nut 33 and a compressor housing 35. The impeller 30 is fixed by means of the nut 33 at the tip of the shaft 32. Herein, a tip portion on the intake passage side of the impeller 30 is referred to as "impeller blade tip 31 ". The outer circumference of the impeller 30 is covered by the compressor housing 35.
[0020] Further, an inlet guide vane 10 (hereunder, referred to as "IGV 10") is provided upstream of the compressor 55. Normally, the IGV 10 is provided to straighten the flow of fresh air that is drawn into the compressor 55. More specifically, the IGV 10 is provided for the purpose of improving surging and efficiency by adding a pre-swirl in the same direction as the rotational direction of the impeller 30 to air in an inlet of the impeller 30. First, the overall structure of the IGV 10 of the first embodiment will be described referring to Fig. 2.
[0021] Fig. 2 is a view for describing the overall structure of the IGV 10 of the first embodiment. The IGV 10 extends radially in the outer circumferential direction of the intake passage from a hub 20 formed at the center thereof. According to the first embodiment, five of the IGVs 10 extend radially in the outer circumferential direction of the intake passage from the hub 20. The IGVs 10 that extend in the outer
circumferential direction of the intake passage are fixed by means of an outer
circumferential flange 12. An outer circumferential passage 37 is formed on the outer side of the outer circumferential flange 12. The outer side of the outer circumferential passage 37 is covered by the compressor housing 35. Next, the inner structure of the IGVs 10 of the first embodiment will be described referring to Fig. 1.
[0022] A cross-sectional view at a position indicated by arrows A (enlarged cross- sectional view AA of the IGV 10) is shown in Fig. 1. As shown in the enlarged cross- sectional view AA of the IGV 10, a hollow passage 11 is formed in the axial direction inside each of the IGVs 10. The hollow passage 11 communicates with the outer circumferential passage 37. Next, the inner structure of the hub 20 will be described referring to Fig. 1.
[0023] In the hub 20, an upstream side of the intake passage is closed, a downstream side of the intake passage is opened, and a hollow portion 21 is formed inside the hub 20. The hollow portion 21 and the hollow passage 1 1 of the IGVs 10 communicate. Here, the open side of the hollow portion 21 is referred to as "opening portion 58".
[0024] A lead-out opening 22 is formed in a side face of the hub 20. The lead-out opening 22 communicates with the hollow portion 21.
[0025] Note that a gap is formed between the hub 20 and the nut 33 of the compressor 55. The gap communicates with the hollow portion 21.
[0026] [Flow of EGR gas]
In Fig. 2, the manner in which part of exhaust gas that is generated by combustion of the engine is guided as EGR gas to the outer circumferential passage 37 is indicated by a hollow arrow. The flow of the EGR gas after the EGR gas is guided into the outer circumferential passage 37 will now be described referring to Fig. 1.
[0027] In Fig. 1, the flow of the EGR gas is indicated by broken-line arrows. As shown by the broken-line arrows, the EGR gas that was guided into the outer circumferential passage 37 is guided into the hollow passage 11. Next, the EGR gas in the hollow passage 1 1 is guided into the hollow portion 21 of the hub 20. Then, the EGR gas in the hollow portion 21 is led out into the intake passage from the lead-out opening 22 and the
gap between the opening portion 58 and the nut 33 that is at the tip of the compressor 55. Further, as indicated by the broken-line anows, the EGR gas is guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31. The flow of the EGR gas from the outer circumferential passage 37 to the lead-out opening 22 and the
aforementioned gap is generated as the result of the EGR gas being drawn in by a negative pressure that is caused by an intake air flow that is produced by rotation of the compressor 55.
[0028] By guiding the EGR gas from the hollow portion 21 of the hub 20 as described above, it is possible to suppress the occurrence of a situation in which the EGR gas merges with fresh air before entering the compressor 55. Therefore, a decrease in the temperature of the EGR gas becomes smaller. As a result, generation of condensed water in the EGR gas can be suppressed.
[0029] In addition, according to the first embodiment, the EGR gas can be guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31. Therefore, even if condensed water is included in the EGR gas, the EGR gas can be guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31 that is a side at which the rotational circumferential speed is slow. As a result, damage of the impeller 30 can be prevented.
[0030] Further, in cold regions, freezing of blow-by gas can be prevented in the case of guiding the blow-by gas to the upstream side of the compressor 55 using a PCV valve. This is because, since the EGR gas warms up the IGVs 10, freezing of moisture in the blow-by gas can be prevented.
[0031] Further, in Fig. 2, condensed water that has accumulated at the lower part of the outer circumferential passage 37 is vaporized by heat of the compressor housing 35 and
the EGR gas after warming up the engine, and the vaporized water can be guided to the compressor 55 together with the EGR gas. It is thereby possible to prevent damage due to corrosion of the outer circumferential passage 37 or the like.
[0032] Note that, in the first embodiment, the IGV 10 corresponds to a "straightening vane" in the above described first invention, and the lead-out opening 22 and the opening portion 58 correspond to a "lead-out opening" in the first invention.
[0033] Second Embodiment
Next, a second embodiment of the present invention will be described referring to Fig. 3. In Fig. 3, components that are common with those of the first embodiment are denoted by the same reference numerals, and a description of such components is omitted below.
[0034] Fig. 3 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are arranged in an intake passage according to the second embodiment. There are two differences between the structure of the second embodiment and the structure of the first embodiment. The first difference is that the hub 20 is solid and the hollow portion 21 is not formed therein. The second difference is that the lead-out opening 22 is provided in a side face of the IGVs 10.
[0035] In the second embodiment, the reason a hollow portion is not provided in the hub 20 is that a case is assumed in which the exhaust gas recirculation apparatus is mounted in a small-sized supercharger in which the diameter of the hub 20 is small. Therefore, since the hollow portion 21 is not formed, the lead-out opening 22 for leading out EGR gas is provided in a side face of the IGVs 10. The lead-out opening 22 of the second embodiment will now be described hereunder.
[0036] A cross-sectional view at a position indicated by arrows B (enlarged cross- sectional view BB of the IGV 10) is shown in Fig. 3. As shown in the enlarged cross- sectional view BB of the IGV 10, the lead-out opening 22 that allows the hollow passage 1 1 inside the IGV 10 to communicate with the intake passage is provided in the side face ofthe lGV lO.
[0037] By providing the lead-out opening 22 in the hollow passage 11, similarly to the first embodiment, EGR gas can be guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31.
[0038] Third Embodiment
Next, a third embodiment of the present invention will be described referring to Fig. 4 and Fig. 5. In Fig. 4 and Fig. 5, components that are common with those of the first embodiment are denoted by the same reference numerals, and a description of such components is omitted below.
[0039] In the third embodiment, a piston is provided inside the hub 20, and sliding of the piston is utilized to perform control with respect to whether or not to introduce EGR gas. Hereunder, the position of the piston in the case of introducing EGR gas is described using Fig. 4, and the position of the piston in the case of not introducing EGR gas is described using Fig. 5.
[0040] Fig. 4 is a cross-sectional view of the exhaust gas recirculation apparatus in a case in which control to introduce EGR gas is performed according to the third embodiment. A piston 25 is provided inside the hub 20 of the third embodiment. An introducing hole 26 for introducing EGR gas from the hollow passage 1 1 is formed in the piston 25. In the third embodiment, of the internal space of the hub 20 that is partitioned by the piston 25, the internal space on the opening portion 58 side is referred to as "hollow portion 52",
and the other internal space is referred to as "negative pressure chamber 24". A stopper 51 for fixing the piston 25 is provided in the hollow portion 52.
[0041] A spring 23 that urges the piston towards the opening portion 58 side is provided in the negative pressure chamber 24. In addition, a negative pressure supply passage 15 that is provided inside each of the IGVs 10 communicates with the negative pressure chamber 24. A control valve 40 is provided in the negative pressure supply passage 15 on the upstream side of the negative pressure chamber 24. Furthermore, a negative pressure pump is provided upstream of the control valve 40. The negative pressure supply passage 15, the control valve 40, and the negative pressure pump constitute a negative pressure generating apparatus. Note that, the IGV 10 provided in the negative pressure supply passage 15 is different from the IGV 10 provided in the hollow passage 1 1.
[0042] Next, control of the position of the piston 25 that is performed utilizing negative pressure will be described. The position of the piston 25 shown in Fig. 4 is the position in a case where the piston 25 slid to the negative pressure chamber 24 side as the result of a negative pressure being generated inside the negative pressure chamber 24. The negative pressure inside the negative pressure chamber 24 is generated as a result of the negative pressure pump operating when the control valve 40 is in an open state. As shown in Fig. 4, the size of the negative pressure is set so that sliding of the piston 25 stops at a position at which the introducing hole 26 formed in the piston 25 and the hollow passage 11 communicate. By stopping the piston 25 at the position shown in Fig. 4, EGR gas from the hollow passage 11 is guided to the hollow portion 52, and thereafter is guided to the opening portion 58. Thus, the EGR gas can be guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31.
[0043] Fig. 5 is a cross-sectional view of the exhaust gas recirculation apparatus in a case in which control is performed so as not to introduce EGR gas according to the third embodiment. The position of the piston 25 shown in Fig. 5 is a position in a case where the piston 25 slid to the hollow portion 52 because a negative pressure is not generated inside the negative pressure chamber 24. This is a position in a case where the control valve 40 is closed and a negative pressure is not generated in the negative pressure chamber 24, and the piston 25 is urged by the spring 23 and contacts against the stopper 51. The hollow passage 11 is blocked by the piston 25 as a result of the piston 25 stopping at the position shown in Fig. 5. Consequently, EGR gas is not introduced into the hollow portion 52.
[0044] Control with respect to whether or not to supply EGR gas to the engine can be performed by means of the control of the position of the piston 25 that is described in Fig, 4 and Fig. 5. Therefore, it is not necessary to separately provide an EGR control valve. Consequently, the size of the overall exhaust gas recirculation apparatus can be reduced. It is thereby possible to reduce the number of components and lower the manufacturing cost.
[0045] Further, in the third embodiment, the degree of opening of the introducing hole 26 may be adjusted by adjusting the output of the negative pressure pump and the degree of opening of the control valve 40. It is thereby possible to adjust the amount of EGR gas that flows to the hollow portion 52 from the hollow passage 1 1.
[0046] Fourth Embodiment
Next, a fourth embodiment of the present invention will be described referring to Fig. 6. In Fig. 6, components that are common with those of the first embodiment are
denoted by the same reference numerals, and a description of such components is omitted below.
[0047] Fig. 6 is a cross-sectional view of a supercharger and an exhaust gas recirculation apparatus that are disposed in an intake passage according to the fourth embodiment. In Fig. 6, three straightening vane 80 that extend in the diametrical direction of the intake passage are shown. The straightening vane 80 that is in the middle of these three straightening vanes 80 is arranged in the vicinity of the nut 33 that is at the tip of the compressor 55.
[0048] As shown in Fig. 6, an EGR passage 84 is provided inside the middle
straightening vane 80. Further, a lead-out opening 82 that allows the EGR passage 84 and the intake passage to communicate is formed in the middle straightening vane 80. When EGR gas is led out from the lead-out opening 82, the EGR gas can be guided to the side of the shaft 32 of the compressor 55 of the impeller blade tip 31.
Claims
1. An exhaust gas recirculation apparatus for an internal combustion engine with a supercharger, comprising:
a straightening vane that is provided on an upstream side of a compressor of the supercharger;
a hollow passage that is provided inside the straightening vane and that communicates with an EGR passage; and
a lead-out opening for EGR gas that is provided at a position that is at a center of an intake passage and is upstream of the compressor, and that communicates with the hollow passage.
2. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 1, wherein a plurality of the straightening vanes extend radially in an outer circumferential direction of the intake passage from a hub that is arranged in a vicinity of a central tip of the compressor on an upstream side of the compressor.
3. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 2, wherein the lead-out opening is formed in the hub.
4. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 2, wherein the lead-out opening is formed in the straightening vane.
5. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 3, wherein, in the hub, an upstream side of the intake passage is closed and a downstream side of the intake passage is opened, a hollow portion is formed that communicates with the hollow passage, and an opening portion of the hollow portion serves as a lead-out opening.
6. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 5, further comprising:
a piston that is provided inside the hollow portion and that slides to the downstream side of the intake passage;
a spring that urges the piston from the upstream side of the intake passage;
a negative pressure generating apparatus that controls a position of the piston by means of a negative pressure; and
an introducing hole for EGR gas that is provided in the piston to adjust an EGR gas amount, and that allows the hollow passage and a hollow portion on the downstream side of the intake passage among the hollow portion that is partitioned by the piston to communicate.
7. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 3 or 5, wherein the lead-out opening is formed in a side face of the hub.
8. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 1, wherein the straightening vane extends in a diametrical direction of the intake passage.
9. The exhaust gas recirculation apparatus for an internal combustion engine with a supercharger according to claim 8, wherein the lead-out opening is formed in the straightening vane.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013268770A JP2015124661A (en) | 2013-12-26 | 2013-12-26 | Exhaust gas recirculation device for internal combustion engine with supercharger |
| JP2013-268770 | 2013-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015098391A1 true WO2015098391A1 (en) | 2015-07-02 |
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ID=52007247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/080996 WO2015098391A1 (en) | 2013-12-26 | 2014-11-18 | Exhaust gas recirculation apparatus for internal combustion engine with supercharger |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015124661A (en) |
| WO (1) | WO2015098391A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017194079A1 (en) * | 2016-05-09 | 2017-11-16 | Volvo Truck Corporation | An inlet system for an internal combustion engine |
| DE102016210011A1 (en) * | 2016-06-07 | 2017-12-21 | Ford Global Technologies, Llc | Charged self-igniting internal combustion engine with exhaust gas recirculation and method for operating such an internal combustion engine |
| WO2018171833A1 (en) * | 2017-03-22 | 2018-09-27 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Exhaust turbocharger |
| DE102020112870A1 (en) | 2020-05-12 | 2021-11-18 | Borgwarner Inc. | Compressor device of a supercharger for an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017194079A1 (en) * | 2016-05-09 | 2017-11-16 | Volvo Truck Corporation | An inlet system for an internal combustion engine |
| WO2017194375A1 (en) * | 2016-05-09 | 2017-11-16 | Volvo Truck Corporation | An inlet system for an internal combustion engine |
| CN109072824A (en) * | 2016-05-09 | 2018-12-21 | 沃尔沃卡车集团 | Gas handling system for internal combustion engine |
| US10590890B2 (en) | 2016-05-09 | 2020-03-17 | Volvo Truck Corporation | Inlet system for an internal combustion engine |
| CN109072824B (en) * | 2016-05-09 | 2021-04-06 | 沃尔沃卡车集团 | Intake system for internal combustion engine |
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| WO2018171833A1 (en) * | 2017-03-22 | 2018-09-27 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Exhaust turbocharger |
| US11008982B2 (en) | 2017-03-22 | 2021-05-18 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Exhaust-gas turbocharger |
| DE102020112870A1 (en) | 2020-05-12 | 2021-11-18 | Borgwarner Inc. | Compressor device of a supercharger for an internal combustion engine |
| DE102020112870B4 (en) | 2020-05-12 | 2022-03-24 | Borgwarner Inc. | Compressor device of a charging device for an internal combustion engine |
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| Publication number | Publication date |
|---|---|
| JP2015124661A (en) | 2015-07-06 |
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