JP7172234B2 - エンジンの吸気装置 - Google Patents
エンジンの吸気装置 Download PDFInfo
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- JP7172234B2 JP7172234B2 JP2018138348A JP2018138348A JP7172234B2 JP 7172234 B2 JP7172234 B2 JP 7172234B2 JP 2018138348 A JP2018138348 A JP 2018138348A JP 2018138348 A JP2018138348 A JP 2018138348A JP 7172234 B2 JP7172234 B2 JP 7172234B2
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
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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
- F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
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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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
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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
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
- F02B37/162—Control of the pumps by bypassing charging air by bypassing, e.g. partially, intake air from pump inlet to pump outlet
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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
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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
- 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
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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
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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
- F02M26/13—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
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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
- F02M26/13—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
- F02M26/21—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 with EGR valves located at or near the connection to the intake system
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
- F02M26/44—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders in which a main EGR passage is branched into multiple passages
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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
- F02M26/65—Constructional details of EGR valves
- F02M26/66—Lift valves, e.g. poppet valves
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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
- F02M26/65—Constructional details of EGR valves
- F02M26/66—Lift valves, e.g. poppet valves
- F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
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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
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
多気筒エンジンの燃焼室に吸気を導く吸気通路と、
上記燃焼室から排気ガスを排出する排気通路と、
上記吸気通路と上記排気通路を接続し、該排気通路から排気ガスの一部をEGRガスとして上記吸気通路に還流させるためのEGR通路とを備え、
上記EGR通路は、上記吸気通路に対する接続口の手前に、上記吸気通路に流入する上記EGRガスの上記接続口における偏流が抑制されるように該EGRガスの流速を低下させる通路断面積が拡大した拡大部を備え、
上記EGR通路は、上記接続口に向かって上記吸気通路に交差し且つ上記接続口の中心線に交差する方向に延びる通路部と、該通路部に続いて上記接続口の中心線の方向に向きが変わって上記接続口に至る変向部とを備え、
上記変向部に上記拡大部が設けられ、
上記拡大部は、上記通路部よりも通路断面積が拡大し、
上記拡大部は、通路断面積が上記接続口に向かって漸次拡大した末広部を備え、
上記変向部は、上記拡大部に続いて通路断面積が縮小して上記接続口に至る部分を備え、該縮小部に上記接続口を開閉するEGR弁を備えていることを特徴とする。
図1に示す車両搭載エンジンシステムにおいて、1はエンジン、2はエンジン1の吸気通路、3はエンジン1の排気通路、4は燃料タンクである。同システムは燃料タンク4で発生する蒸発燃料をエンジン1の吸気通路2に導く蒸発燃料処理装置5を備えている。
れ、キャニスタ51と吸気通路2がパージ通路53によって接続されている。キャニスタ51には、大気開放口を有する外気導入路54が接続されている。パージ通路53には、パージ通路53を開閉するパージ弁55が設けられている。パージ弁55は、所定のパージ条件が成立しているとき、例えば、燃料噴射弁11による燃料噴射量の制御によってエンジン1の空燃比を適正に制御し得る状態にあるときに、開となる。
図2に示すように、過給機23はエンジン1の上部において軸心を気筒列方向に延ばした状態に設けられている。この過給機23に気筒列方向に延びる吸気通路2を構成する上流側吸気管71が結合されている。過給機23における上流側吸気管71の反対側に該過給機23の駆動部ハウジング72が突出している。この駆動部ハウジング72に、エンジン1のクランク軸で過給機23を駆動するための電磁クラッチ27及び駆動軸が収容されている。その駆動軸に結合したプーリ73に伝動ベルト74が巻き掛けられている。
拡大部95の通路断面積は接続口69の通路断面積よりも大きい。変向部94は、拡大部95に続いて通路断面積が縮小して接続口69に至る部分を備え、該縮小部に接続口69を開閉するEGR弁62の弁座97が形成されている。
上記実施形態では、図3に示す過給機23の非作動時には、吸気通路2のスロットル弁22を通過した新気は、接続口79よりバイパス通路25に流入する。その新気は、バイパス通路25のEGR弁62を設けた部分及びバイパス弁26を設けた部分を通り、図4に示す分岐部25a,25bからサージタンク75に導入される。
2 吸気通路
3 排気通路
6 EGR通路
10 燃焼室
23 過給機
25 バイパス通路
26 バイパスバルブ
62 EGR弁
69 接続口
92 通路部
94 変向部
95 拡大部
96 末広部
98 弁軸
Claims (4)
- 多気筒エンジンの燃焼室に吸気を導く吸気通路と、
上記燃焼室から排気ガスを排出する排気通路と、
上記吸気通路と上記排気通路を接続し、該排気通路から排気ガスの一部をEGRガスとして上記吸気通路に還流させるためのEGR通路とを備えているエンジンの吸気装置であって、
上記EGR通路は、上記吸気通路に対する接続口の手前に、上記吸気通路に流入する上記EGRガスの上記接続口における偏流が抑制されるように該EGRガスの流速を低下させる通路断面積が拡大した拡大部を備え、
上記EGR通路は、上記接続口に向かって上記吸気通路に交差し且つ上記接続口の中心線に交差する方向に延びる通路部と、該通路部に続いて上記接続口の中心線の方向に向きが変わって上記接続口に至る変向部とを備え、
上記変向部に上記拡大部が設けられ、
上記拡大部は、上記通路部よりも通路断面積が拡大し、
上記拡大部は、通路断面積が上記接続口に向かって漸次拡大した末広部を備え、
上記変向部は、上記拡大部に続いて通路断面積が縮小して上記接続口に至る部分を備え、該縮小部に上記接続口を開閉するEGR弁を備えていることを特徴とするエンジンの吸気装置。 - 請求項1において、
上記吸気通路は、上記燃焼室に導入する吸気の圧力を高める過給機を配置した過給用通路と、上記過給機の上流側と下流側を結び上記過給機をバイパスして吸気を上記燃焼室に導くバイパス通路とを備え、
上記EGR通路は、上記吸気通路の上記バイパス通路に接続されていることを特徴とするエンジンの吸気装置。 - 請求項2において、
上記接続口に設けられた、上記EGRガスの還流量を調節するポペット式のEGR弁を備え、
上記EGR弁の弁軸が上記バイパス通路を貫通していることを特徴とするエンジンの吸気装置。 - 請求項2又は請求項3において、
上記バイパス通路に設けられた、上記過給機による吸気の過給圧を調節するバタフライ式のバイパス弁を備え、
上記接続口は、上記バイパス通路における上記バイパス弁よりも上流側に開口していることを特徴とするエンジンの吸気装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018138348A JP7172234B2 (ja) | 2018-07-24 | 2018-07-24 | エンジンの吸気装置 |
EP19840003.8A EP3808966B1 (en) | 2018-07-24 | 2019-06-27 | Air intake device for engine |
PCT/JP2019/025515 WO2020021952A1 (ja) | 2018-07-24 | 2019-06-27 | エンジンの吸気装置 |
US17/261,551 US11378041B2 (en) | 2018-07-24 | 2019-06-27 | Air intake device for engine |
CN201980048170.8A CN112449665B (zh) | 2018-07-24 | 2019-06-27 | 发动机的进气装置 |
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JP2018138348A JP7172234B2 (ja) | 2018-07-24 | 2018-07-24 | エンジンの吸気装置 |
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JP2020016164A JP2020016164A (ja) | 2020-01-30 |
JP7172234B2 true JP7172234B2 (ja) | 2022-11-16 |
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US (1) | US11378041B2 (ja) |
EP (1) | EP3808966B1 (ja) |
JP (1) | JP7172234B2 (ja) |
CN (1) | CN112449665B (ja) |
WO (1) | WO2020021952A1 (ja) |
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FR3069609B1 (fr) * | 2017-07-26 | 2019-08-23 | Mmt ag | Vanne de dosage de fluide |
JP2020012429A (ja) * | 2018-07-19 | 2020-01-23 | マツダ株式会社 | エンジンの蒸発燃料処理装置 |
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- 2019-06-27 US US17/261,551 patent/US11378041B2/en active Active
- 2019-06-27 CN CN201980048170.8A patent/CN112449665B/zh active Active
- 2019-06-27 EP EP19840003.8A patent/EP3808966B1/en active Active
- 2019-06-27 WO PCT/JP2019/025515 patent/WO2020021952A1/ja unknown
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JP2013060921A (ja) | 2011-09-14 | 2013-04-04 | Fuji Heavy Ind Ltd | エンジンの排気ガス還流装置 |
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Also Published As
Publication number | Publication date |
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US11378041B2 (en) | 2022-07-05 |
EP3808966A1 (en) | 2021-04-21 |
CN112449665B (zh) | 2022-10-21 |
US20210262420A1 (en) | 2021-08-26 |
JP2020016164A (ja) | 2020-01-30 |
EP3808966B1 (en) | 2022-04-20 |
CN112449665A (zh) | 2021-03-05 |
WO2020021952A1 (ja) | 2020-01-30 |
EP3808966A4 (en) | 2021-04-21 |
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