WO2023062775A1 - エンジンの吸気系構造 - Google Patents

エンジンの吸気系構造 Download PDF

Info

Publication number
WO2023062775A1
WO2023062775A1 PCT/JP2021/038043 JP2021038043W WO2023062775A1 WO 2023062775 A1 WO2023062775 A1 WO 2023062775A1 JP 2021038043 W JP2021038043 W JP 2021038043W WO 2023062775 A1 WO2023062775 A1 WO 2023062775A1
Authority
WO
WIPO (PCT)
Prior art keywords
egr
exhaust gas
tank
intake
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/038043
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
肇 石井
光高 小島
健一朗 飛田
洋之 木村
慎司 新海
幸二 竹内
健吾 前田
則夫 高安
勝 西川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP2023553843A priority Critical patent/JP7636733B2/ja
Priority to PCT/JP2021/038043 priority patent/WO2023062775A1/ja
Publication of WO2023062775A1 publication Critical patent/WO2023062775A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—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
    • 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
    • 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
    • F02M35/104—Intake manifolds
    • 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 invention relates to the structure of the exhaust recirculated gas introduction part in the intake passage of a vehicle.
  • the EGR device includes an EGR passage that communicates an exhaust passage and an intake passage, recirculates a portion of the exhaust gas (EGR gas) from the exhaust passage to the intake passage, and reduces the oxygen concentration of the intake air. As a result, the temperature in the combustion chamber of the engine is lowered and NOx emissions from the engine are suppressed.
  • EGR gas exhaust gas
  • the multi-cylinder engine described in Patent Document 1 has a structure in which EGR gas (exhaust gas recirculation gas) is introduced in the vicinity of the position where the flow is divided into each cylinder in the intake passage, and is introduced in a substantially tangential direction from the outer peripheral portion of the intake passage.
  • EGR gas exhaust gas recirculation gas
  • a configuration is adopted in which EGR gas is introduced into the As a result, a swirling flow of EGR gas is generated in the intake passage to promote mixing of the EGR gas and the intake air.
  • the present invention has been made in view of such problems, and its object is to provide an engine EGR introduction structure capable of introducing intake air having a uniform concentration of exhaust gas recirculated to a plurality of cylinders. to provide.
  • an engine intake system structure is an engine intake system structure including an exhaust gas recirculation device for recirculating part of exhaust gas into an intake passage as exhaust gas recirculation gas, wherein the intake passage an upstream intake pipe provided upstream of the surge tank and provided with an introduction port for introducing the exhaust gas recirculation gas; and an upstream side intake pipe provided downstream of the surge tank and provided to each cylinder of the engine.
  • the surge tank includes a tank inlet provided on the upstream tank wall surface and connected to the upstream intake pipe, and a tank inlet provided on the downstream tank wall surface and connected to the downstream intake pipe.
  • the tank inlet is displaced on one side in the extending direction of the upstream tank wall surface, and the tank outlet is provided on the other side in the extending direction of the upstream tank wall surface. It is characterized in that it is displaced and provided in the downstream side tank wall surface, and the introduction port is provided in the other side of the upstream side intake pipe and opens toward the one side.
  • the tank inlet and tank outlet are offset, and in the upstream intake pipe, the introduction port for exhaust recirculated gas opens toward the opposite side of the tank outlet.
  • the exhaust recirculation gas introduced into the intake passage from the introduction port becomes difficult to go directly to the tank discharge port together with the intake air. Therefore, the intake air and the exhaust recirculated gas are easily mixed in the surge tank.
  • the exhaust gas recirculation device includes an exhaust gas recirculation passage introduction portion extending in a tangential direction of the upstream side intake pipe and supplied with the exhaust gas recirculation gas, and the introduction port is provided at a contact point of the exhaust gas recirculation passage introduction portion. I hope you can.
  • the exhaust recirculated gas flows into the intake pipe in a direction different from the flow direction of the exhaust gas recirculated in the exhaust recirculation passage introduction portion, so that the exhaust recirculated gas and the intake air can be easily mixed in the upstream side intake pipe.
  • the exhaust gas recirculation device includes an exhaust gas recirculation passage extension extending in a circumferential direction along an outer wall of the upstream side intake pipe on a side opposite to the exhaust gas recirculation passage introduction portion, and the introduction port includes the exhaust gas recirculation passage. It is preferable to have a first introduction port provided at a contact point of the passage introduction portion and a second introduction port provided at the extension portion of the exhaust gas recirculation passage.
  • the exhaust recirculated gas flows into the upstream side intake pipe from two points, the first inlet and the second inlet, that is, from a plurality of directions, so that the exhaust gas recirculated and the intake air are mixed in the upstream side intake pipe. can be promoted.
  • downstream end of the upstream intake pipe extends into the surge tank toward the one side of the downstream tank wall surface.
  • the exhaust gas recirculation passage introduction portion is formed integrally with the upstream tank wall surface,
  • the downstream intake pipe preferably extends along the downstream tank wall surface to the one side of the upstream tank wall surface.
  • the structure of the intake system of the engine can be made compact while ensuring the length of the downstream intake pipe in the extending direction of the upstream tank wall surface.
  • the tank inlet and the tank outlet are arranged offset from each other in the surge tank, and the introduction port of the exhaust gas recirculated gas in the upstream intake pipe is located apart from the tank outlet. Since the opening is directed to the opposite side, it becomes difficult for the exhaust recirculated gas introduced into the intake passage from the introduction port to flow directly to the tank discharge port together with the intake air, and the intake air and the exhaust recirculated gas are easily mixed in the surge tank. As a result, it is possible to introduce intake air having a uniform exhaust gas recirculation gas concentration into each cylinder of the engine, thereby improving the effect of the exhaust gas recirculation device.
  • FIG. 1 is a schematic configuration diagram of a front portion of a vehicle according to an embodiment of the present invention
  • FIG. FIG. 2 is a vertical cross-sectional view of an engine intake system accessory
  • FIG. 2 is a vertical cross-sectional view of an engine intake system accessory
  • FIG. 3 is a cross-sectional view of an engine intake system accessory
  • It is a longitudinal cross-sectional view of an intake system accessory of another embodiment.
  • FIG. 1 is a schematic structural diagram of the front portion of a vehicle 1 that employs an intake system structure for an engine 3 according to an embodiment of the present invention.
  • FIG. 2 is a vertical cross-sectional view of the auxiliary equipment of the intake system arranged in front of the engine 3, and is a view seen from the left side in the vehicle width direction when mounted on the vehicle.
  • FIG. 3 is a vertical cross-sectional view of an intake system accessory of the engine 3.
  • FIG. 4 is a cross-sectional view of an intake system accessory of the engine 3.
  • FIG. 3 is a cross-sectional view taken along line AA shown in FIG.
  • FIG. 4 is a cross-sectional view taken along line BB shown in FIG.
  • a vehicle 1 that employs the present invention is equipped with a power unit 4 including an engine 3 in a front engine room 2 .
  • a vehicle 1 is a plug-in hybrid vehicle capable of EV mode, series mode, and parallel mode.
  • the power unit 4 is equipped with the engine 3, a travel drive motor (not shown), and a power generation motor generator.
  • the traveling drive motor and the power generation motor generator are arranged on the left side of the engine 3 in the vehicle width direction.
  • the power generation motor generator is also used as a starter motor for the engine 3 .
  • the engine 3 is a 4-cylinder engine and is horizontally mounted on the vehicle 1 .
  • An intake manifold 5 is provided on the front surface 3a of the engine 3, and an intake passage 6 is arranged.
  • an exhaust manifold 7 is provided on the rear side of the engine 3, and an exhaust passage 8 is arranged.
  • a throttle valve 10 is provided in the intake passage 6 .
  • a surge tank 11 is provided between the throttle valve 10 of the intake passage 6 and the intake manifold 5 .
  • the throttle valve 10 is located in the upper part of the engine 3 on the side of the front surface 3a, and has a branch pipe 12 (downstream intake pipe) connected to the No. 2 cylinder positioned at the center in the vehicle width direction of the engine 3, and a branch pipe connected to the No. 3 cylinder. It is arranged between the tube 12 .
  • the surge tank 11 is provided along the front surface 3a of the engine 3 and arranged below the throttle valve 10.
  • a branch pipe 12 of the intake manifold 5 is connected from the surge tank 11 toward each cylinder.
  • the branch pipe 12 bends toward the vehicle front side from the lower surface of the surge tank 11, extends upward adjacent to the front side of the surge tank 11, and is connected to an intake port 13 of each cylinder provided at the upper portion of the front surface 3a of the engine 3.
  • the exhaust passage 8 is provided with a front catalyst 20 downstream of the exhaust manifold 7 .
  • a rear catalyst 21 is provided downstream of the front catalyst 20 in the exhaust passage 8 .
  • the front catalyst 20 and the rear catalyst 21 are exhaust purification catalysts such as three-way catalysts.
  • the front catalyst 20 is relatively small and is arranged adjacent to the rear surface of the engine 3 .
  • the front catalyst 20 is arranged near the engine 3 so that the exhaust gas flows immediately from the engine 3 in order to improve the purification performance of the exhaust gas during cold operation such as immediately after starting the engine.
  • the rear catalyst 21 is relatively large and is arranged under the floor of the vehicle 1, for example.
  • the engine 3 is equipped with an EGR device 30 (exhaust gas recirculation device).
  • the EGR device 30 reduces the oxygen concentration of the intake air by recirculating part of the exhaust gas to the intake passage 6 to suppress the temperature rise in the combustion chamber of the engine 3 . This reduces NOx in the exhaust gas from the engine 3 .
  • the EGR device 30 includes an EGR passage 31 (exhaust recirculation passage) that connects the intake passage 6 and the exhaust passage 8, an EGR valve 34 that is interposed in the EGR passage 31 and adjusts the opening area of the EGR passage 31, the EGR passage 31 It has an EGR cooler 32 provided in.
  • EGR passage 31 exhaust recirculation passage
  • EGR valve 34 that is interposed in the EGR passage 31 and adjusts the opening area of the EGR passage 31, the EGR passage 31 It has an EGR cooler 32 provided in.
  • the EGR cooler 32 is a water-cooled cooler that lowers the temperature of EGR gas (exhaust gas recirculation gas) that is the exhaust gas passing through the EGR passage 31, and is arranged along the rear surface of the engine 3. By lowering the temperature of the EGR gas, the EGR cooler 32 further suppresses the temperature rise of the intake air into which the EGR gas is introduced, thereby improving the NOx reducing effect of the EGR device 30 .
  • EGR gas exhaust gas recirculation gas
  • the EGR passage 31 passes through the EGR cooler 32 from the vicinity of the exhaust outlet of the front catalyst 20, extends upward from the rear left portion of the engine, wraps around the front side of the engine 3, and is arranged at the upper left portion of the engine. 34 and is connected to the intake passage 6 between the throttle valve 10 and the surge tank 11 .
  • an adapter 40 and an EGR ring 41 (upstream intake pipe) are provided between the throttle valve 10 and the surge tank 11.
  • the adapter 40 and the EGR ring 41 have substantially the same diameter circular tube shape.
  • the upper end of the EGR ring 41 is connected to the throttle valve 10, and the lower end of the EGR ring 41 is connected to a tank inlet 42 provided in the upper wall 11a of the surge tank 11 (upstream tank wall surface).
  • the surge tank 11 is formed in a substantially rectangular box shape, and the tank flow is located slightly to the right in the vehicle width direction and on the front side (one side) of the vehicle from a substantially central position in the left-right direction (vehicle width direction) of the upper wall 11a.
  • An inlet 42 is provided.
  • tank discharge ports 43 (inflow ports) corresponding to the number of cylinders of the engine 3 are arranged in the left-right direction on the lower wall 11b (downstream tank wall surface) of the surge tank 11 on the vehicle rear side (the other side). placed side by side. That is, in the surge tank 11, the tank inlet 42 and the tank outlet 43 are offset in the longitudinal direction of the vehicle.
  • branch pipes 12 of the intake manifold 5 extend adjacent to the lower side and the front side of the surge tank 11 toward the intake ports 13 of the corresponding left and right cylinders.
  • a connection point between the EGR passage 31 and the intake passage 6 in the EGR device 30 that is, a point where EGR gas is introduced into the intake passage 6 is located between the throttle valve 10 and the surge tank 11 .
  • the EGR passage 31 on the downstream side of the EGR valve 34 extends from the left side in the vehicle width direction to the right side in the vehicle width direction along the upper wall 11 a of the surge tank 11 and is formed so as to surround the side surface of the EGR ring 41 . It has an EGR introduction passage portion 45 (exhaust recirculation passage introduction portion).
  • the EGR introduction passage portion 45 is formed integrally with the upper wall 11a of the surge tank 11 and has a tubular shape with a rectangular cross section in the vertical direction. and has a rectangular shape whose vertical width is smaller than its front-to-rear width.
  • the EGR introduction passage portion 45 extends rightward in the vehicle width direction from the outer wall surface of the EGR ring 41 on the right side in the vehicle width direction.
  • the EGR introduction passage portion 45 is arranged so as to be offset to the rear side of the vehicle with respect to the axis of the EGR ring 41 .
  • the distance between the right inner wall surface of the EGR introduction passage portion 45 and the right outer wall surface of the EGR ring 41 on the distal end side in the extension direction of the EGR introduction passage portion 45, and the distance between the rear inner wall surface of the EGR introduction passage portion 45 and the rear outer wall surface of the EGR ring 41 is, for example, 1 cm. A certain interval is formed.
  • the front outer wall surface of the EGR ring 41 is in contact with the front inner wall surface of the EGR introduction passage portion 45 . That is, the space inside the EGR introduction passage portion 45 faces the right, rear, and left portions of the outer wall surface of the EGR ring 41 .
  • a ring hole 50 (first introduction port) is provided in the rear portion of the outer wall surface of the EGR ring 41, and a ring hole 51 (first introduction port) is provided in the right portion. 2 inlet) are provided.
  • the EGR gas that has passed through the EGR valve 34 is formed to pass through the ring holes 50 and 51 from the EGR introduction passage portion 45 and be introduced into the intake passage 6 inside the EGR ring 41 .
  • the EGR introduction passage portion 45 includes a body portion 45a (exhaust gas recirculation passage introduction portion) extending leftward in the vehicle width direction, which is the tangential direction from the EGR ring 41, and a vehicle width direction right side opposite to the body portion 45a. is provided with an extension portion 45b (exhaust recirculation passage extension portion) extending in the circumferential direction along the outer wall of the EGR ring 41 .
  • the EGR ring 41 is provided with a ring hole 50 at a position on the rear side of the vehicle, which is a point of contact with the EGR introduction passage portion 45, and a ring hole 51 is provided in the extension portion 45b.
  • the throttle valve 10 and the intake manifold 5, which are devices of the intake system, are provided on the front surface 3a side of the engine 3 mounted horizontally in the vehicle 1.
  • a surge tank 11 is provided between the throttle valve 10 and the intake manifold 5 .
  • a branch pipe 12 of the intake manifold 5 is connected from the surge tank 11 to each cylinder.
  • the intake passage 6 is provided with an EGR device 30 that supplies EGR gas, which is a part of the exhaust gas. EGR gas is introduced.
  • the EGR ring 41 has ring holes 50, 51 as inlets for introducing EGR gas into the intake passage 6.
  • the ring hole 50 opens toward the front of the vehicle, and the ring hole 51 opens toward the left in the vehicle width direction. It's open.
  • each tank discharge port 43 for discharging intake air from the surge tank 11 to the branch pipe 12 faces upward.
  • a tank inlet 42 through which intake air flows into the surge tank 11 from the EGR ring 41 is displaced toward the vehicle front side of the upper wall 11a of the surge tank 11, and a tank discharge port 43 is provided toward the vehicle rear side of the lower wall 11b. Since they are displaced, the tank inlet 42 and the tank outlet 43 are offset in the longitudinal direction of the vehicle. Further, the ring hole 50 is arranged on the vehicle rear side of the EGR ring 41 and opens toward the vehicle front side. As a result, the EGR gas that has flowed into the EGR ring 41 from the ring hole 50 toward the front of the vehicle is less likely to go directly to the tank discharge port 43 of the surge tank 11 arranged on the rear side of the vehicle. As a result, the intake air and the EGR gas are easily mixed in the surge tank 11, and the intake air having a uniform concentration of the EGR gas can be introduced into each cylinder of the engine 3, so that the effect of the EGR device 30 can be improved. .
  • the EGR introduction passage portion 45 which is the most downstream portion of the EGR passage 31 leading the EGR gas to the intake passage 6, extends in the lateral direction of the vehicle, which is the tangential direction of the EGR ring 41, and the ring hole 50 is formed in the EGR introduction passage portion 45. Since it is provided at the contact point, the EGR gas that moves rightward in the vehicle width direction in the EGR introduction passage portion 45 changes its direction toward the front of the vehicle from the ring hole 50 and flows into the EGR ring 41 . As a result, the EGR gas is not introduced directly into the EGR ring 41 from the ring hole 50 but is diffused, thereby promoting mixing of the intake air and the EGR gas within the EGR ring 41 .
  • the EGR ring 41 is provided with two ring holes 50 and 51 which are discharge ports for EGR gas and are spaced apart from each other in the circumferential direction, the EGR gas and the intake air are easily mixed in the EGR ring 41. can do.
  • the ring hole 50 is provided at the contact point between the EGR introduction passage portion 45 and the EGR ring 41 and opens toward the front of the vehicle, and the ring hole 51 is provided in the extension portion 45b and opens toward the left in the vehicle width direction. Since the EGR gas flows into the EGR ring 41 from different positions in different directions, mixing of the EGR gas and the intake air can be promoted within the EGR ring 41 .
  • the EGR introduction passage portion 45 which is the most downstream portion of the EGR passage 31 that guides the EGR gas to the intake passage 6, extends toward the EGR ring 41 from left to right in the vehicle width direction. Therefore, the EGR gas flowing through the EGR introduction passage portion 45 toward the EGR ring 41 easily reaches the left side of the EGR ring 41 in the vehicle width direction (the side opposite to the predetermined direction).
  • the ring holes 50 and 51 are provided on the vehicle rear side or the vehicle right side of the outer peripheral wall surface of the EGR ring 41, and are not provided on the vehicle left side. Therefore, the EGR gas is discharged from the plurality of ring holes 50 and 51 in a small amount, and the mixing of the intake air and the EGR gas in the EGR ring 41 can be further promoted.
  • a plurality of tank discharge ports 43 are provided side by side in the vehicle width direction, and the center of the EGR ring 41 is located in the vehicle width direction with respect to the center position of the plurality of tank discharge ports 43 in the vehicle width direction. It is offset to the right side in the vehicle width direction on the side of the extension 45 b of the passage portion 45 .
  • the ring hole 51 is positioned on the right side in the vehicle width direction, which is the opposite side so that the introduction of EGR gas is not suppressed by the displaced intake air.
  • the EGR introduction passage portion 45 extends rightward in the vehicle width direction and has a pipe shape with a closed tip.
  • the EGR ring 41 penetrates to form an introduction portion for EGR gas.
  • the EGR gas introducing portion for the intake passage 6 can be configured in a simple and compact manner.
  • the surge tank 11 and the EGR introduction passage portion 45 can be configured compactly.
  • the branch pipe 12 is configured to extend toward the front side of the vehicle along the lower wall 11b of the surge tank 11 . Since the branch pipe 12 is connected to the vehicle rear side of the surge tank 11, the length of the branch pipe 12 in the vehicle front-rear direction is secured and the bending radius is increased, while the surge tank 11 and the branch pipe 12 are connected in the vehicle front-rear direction. length can be reduced. Therefore, the structure of the intake system of the engine 3 can be made compact while suppressing the intake resistance at the branch pipe 12 .
  • the tank inlet 42 which is the opening position of the lower end of the EGR ring 41, is perpendicular to the tank outlet 43, which is the opening position of the branch pipe 12 in the surge tank 11, and the inflow direction of the intake air from the tank inlet 42.
  • the bottom wall 11b of the surge tank 11 is located in front of the opening side of the tank inlet 42 and is offset in the front-rear direction.
  • the intake air containing the EGR gas flowing into the surge tank 11 from the tank inlet 42 collides with the lower wall 11b of the surge tank 11 and spreads in the longitudinal direction and the vehicle width direction of the vehicle. is promoted, and unevenness in the EGR gas concentration of the intake air supplied to each cylinder can be suppressed.
  • the present invention is not limited to the above embodiments.
  • the lower end of the EGR ring 41 is at substantially the same vertical position as the inner wall surface of the upper wall 11 a of the surge tank 11 .
  • the EGR ring 41 is extended downward, that is, the EGR ring 41 is extended downward toward the portion of the lower wall 11b of the surge tank 11 on the front side of the vehicle.
  • the lower end 41 a may protrude below the inner wall surface of the upper wall 11 a of the surge tank 11 .
  • the distance from the ring holes 50 and 51, which are the EGR gas introduction positions in the EGR ring 41, to the inside of the surge tank 11 is extended. Mixing with EGR gas can be promoted.
  • the distance between the lower end of the EGR ring 41 and the lower wall 11b of the surge tank 11 is shortened, the intake air containing the EGR gas flowing into the surge tank 11 from the EGR ring 41 collides with the lower wall 11b of the surge tank 11. becomes easier. As a result, mixing of the EGR gas in the surge tank 11 can be promoted, and unevenness in concentration of the EGR gas in the intake air supplied to the cylinders from the tank discharge ports 43 can be further suppressed.
  • the adapter 40 and the EGR ring 41 have separate structures, but the adapter 40 and the EGR ring 41 may have an integral structure.
  • a plurality of tank discharge ports 43 are provided according to the number of cylinders of the engine 3, but the number of tank discharge ports 43 may be less than the number of cylinders of the engine 3.
  • the structure may be such that only one exhaust port 43 is provided and the branch pipe 12 is branched according to the number of cylinders of the engine 3 to introduce intake air into each cylinder.
  • the present invention is applied to the engine 3 mounted on a plug-in hybrid vehicle, but it can also be applied to an engine mounted on a hybrid vehicle or a gasoline vehicle, or an engine other than a vehicle.
  • INDUSTRIAL APPLICABILITY The present invention can be widely applied to engines equipped with an EGR device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
PCT/JP2021/038043 2021-10-14 2021-10-14 エンジンの吸気系構造 Ceased WO2023062775A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023553843A JP7636733B2 (ja) 2021-10-14 2021-10-14 エンジンの吸気系構造
PCT/JP2021/038043 WO2023062775A1 (ja) 2021-10-14 2021-10-14 エンジンの吸気系構造

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/038043 WO2023062775A1 (ja) 2021-10-14 2021-10-14 エンジンの吸気系構造

Publications (1)

Publication Number Publication Date
WO2023062775A1 true WO2023062775A1 (ja) 2023-04-20

Family

ID=85987325

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/038043 Ceased WO2023062775A1 (ja) 2021-10-14 2021-10-14 エンジンの吸気系構造

Country Status (2)

Country Link
JP (1) JP7636733B2 (https=)
WO (1) WO2023062775A1 (https=)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825653U (ja) * 1981-08-11 1983-02-18 マツダ株式会社 エンジンの吸気装置
JPH0517148U (ja) * 1991-08-08 1993-03-05 いすゞ自動車株式会社 内燃機関のｅｇｒ装置
JPH05223016A (ja) * 1992-02-13 1993-08-31 Toyota Motor Corp 内燃機関の排気ガス再循環装置
JP2003097369A (ja) * 2001-09-19 2003-04-03 Honda Motor Co Ltd 多気筒内燃機関の吸気装置
JP3539246B2 (ja) * 1998-11-27 2004-07-07 日産自動車株式会社 内燃機関の排気還流装置
JP2014190172A (ja) * 2013-03-26 2014-10-06 Kubota Corp エンジンのｅｇｒ装置
JP2017014970A (ja) * 2015-06-30 2017-01-19 ダイハツ工業株式会社 サージタンク付き吸気マニホールド

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825653U (ja) * 1981-08-11 1983-02-18 マツダ株式会社 エンジンの吸気装置
JPH0517148U (ja) * 1991-08-08 1993-03-05 いすゞ自動車株式会社 内燃機関のｅｇｒ装置
JPH05223016A (ja) * 1992-02-13 1993-08-31 Toyota Motor Corp 内燃機関の排気ガス再循環装置
JP3539246B2 (ja) * 1998-11-27 2004-07-07 日産自動車株式会社 内燃機関の排気還流装置
JP2003097369A (ja) * 2001-09-19 2003-04-03 Honda Motor Co Ltd 多気筒内燃機関の吸気装置
JP2014190172A (ja) * 2013-03-26 2014-10-06 Kubota Corp エンジンのｅｇｒ装置
JP2017014970A (ja) * 2015-06-30 2017-01-19 ダイハツ工業株式会社 サージタンク付き吸気マニホールド

Also Published As

Publication number Publication date
JPWO2023062775A1 (https=) 2023-04-20
JP7636733B2 (ja) 2025-02-27

Similar Documents

Publication Publication Date Title
CN102297046B (zh) 发动机的排气回流装置
JP4592108B2 (ja) 内燃機関の吸気装置
US10746080B2 (en) Exhaust system device for vehicle
JP2009156264A5 (https=)
JP2016014345A (ja) 内燃機関の排気ガス還流装置
JP2013007357A (ja) 内燃機関の吸気装置
US9938934B2 (en) Exhaust gas recirculation
JP7636733B2 (ja) エンジンの吸気系構造
JP7663077B2 (ja) エンジンの吸気系構造
JP7636732B2 (ja) エンジンの吸気系構造
CN113494394A (zh) 发动机的egr系统
US11008984B2 (en) Motor vehicle on which a vehicle engine is mounted
JP2010222975A (ja) 排気ガス還流装置
JP3674329B2 (ja) 排気ガス還流装置用排気ガス導入部構造
CN113494393A (zh) 发动机的egr系统
JP7593503B2 (ja) 車両用エンジンの補機配置構造
JPH1077913A (ja) 内燃機関の吸気装置
WO2025104995A1 (ja) 排気ガス再循環装置およびエンジン
JP2004232617A (ja) エンジンの吸気装置
CN222121661U (zh) 一种小型汽车用进气歧管结构
JPWO2023062772A5 (https=)
CN221169797U (zh) 一种集成egr管路的进气歧管
JP2025080350A (ja) 排気ガス再循環装置およびエンジン
CN116677520A (zh) 一种废气再循环系统、动力总成和车辆
IT202300016404A1 (it) Motore a combustione interna con scambiatore di calore per egr

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21960633

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2023553843

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2401001665

Country of ref document: TH

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21960633

Country of ref document: EP

Kind code of ref document: A1