WO2022163785A1 - エンジン - Google Patents

エンジン Download PDF

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Publication number
WO2022163785A1
WO2022163785A1 PCT/JP2022/003189 JP2022003189W WO2022163785A1 WO 2022163785 A1 WO2022163785 A1 WO 2022163785A1 JP 2022003189 W JP2022003189 W JP 2022003189W WO 2022163785 A1 WO2022163785 A1 WO 2022163785A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
baffle plate
baffle
oil pan
cylinder block
Prior art date
Application number
PCT/JP2022/003189
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
治 大竹
大湖 鮫島
Original Assignee
三菱自動車工業株式会社
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 三菱自動車工業株式会社 filed Critical 三菱自動車工業株式会社
Priority to JP2022578496A priority Critical patent/JP7473019B2/ja
Publication of WO2022163785A1 publication Critical patent/WO2022163785A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases

Definitions

  • a piston that generates driving force by sliding vertically is arranged in a cylinder.
  • lubricating oil oil
  • oil pump is circulated in the engine by an oil pump in order to reduce friction between driving parts such as pistons and crankshafts and peripheral parts.
  • the oil stored in the oil pan may contain air in the form of air bubbles due to waving of the oil surface or dripping from the cylinder into the oil pan.
  • air-containing oil has the problem of forming an air space in the pump and reducing the operating efficiency of the pump.
  • the present invention has been made in view of such problems, and the purpose thereof is to provide an engine that can reduce the deterioration of the piston operating resistance due to the baffle plate.
  • the engine of the present invention comprises a cylinder block in which a plurality of vertically extending cylinders are arranged side by side in a predetermined direction; and a baffle plate disposed in the oil pan, wherein the baffle plate is inclined in a direction approaching the cylinder block toward both edges in the predetermined direction. characterized by becoming
  • the baffle plate is inclined toward the cylinder block toward both edges in a predetermined direction, so that the air discharged from one of the cylinders toward the oil pan is guided in the direction in which the cylinders are arranged. After that, it is guided upward and guided to another cylinder, so that the air can be preferably discharged from the cylinder.
  • the baffle plate is bent along a bent portion extending in a direction crossing the predetermined direction in the horizontal direction, and the bent portion corresponds to between the adjacent cylinders. It is preferably formed in position.
  • the baffle plate so as to bend at a corresponding position between the adjacent cylinders, only the portion of the baffle plate closer to one cylinder than the bent portion of the baffle plate is positioned below one of the adjacent cylinders. However, below the other cylinder 11a, only the portion closer to the other cylinder than the bent portion of the baffle plate is located, and the airflow along the portion closer to one cylinder than the bent portion of the baffle plate and the airflow from the bent portion of the baffle plate It is possible to suppress interference with the airflow along the other cylinder side portion in the vicinity of the bent portion.
  • each of the cylinders is provided with a piston, and the pistons provided in the adjacent cylinders have different phases of piston movement.
  • the other one of the adjacent cylinders sucks in the air because the phases of the piston motion of the adjacent pistons are different above the bent portion. to reduce pressure fluctuations in the piston.
  • a wall portion extending upward is formed at one end portion of the baffle plate in the predetermined direction.
  • the oil pan has an open area separated from the baffle plate by a predetermined distance or more when viewed in the horizontal direction
  • the baffle plate has a wall extending upward from the peripheral edge of the baffle plate.
  • the wall portion is formed with an opening opening to the open area in at least a part of the portion in contact with the open area.
  • the baffle plate is formed with an open portion that opens to the open area in at least a part of the wall that is in contact with the open area that is separated from the baffle plate by a certain distance or more when viewed in the horizontal direction. Air moving along can be controlled toward the open area.
  • the baffle plate is inclined toward the cylinder block toward both edges in a predetermined direction, so that the air discharged from one of the cylinders toward the oil pan After being guided in the direction, the air is guided upward and guided to another cylinder, so the air can be preferably discharged from the cylinder. As a result, it is possible to reduce the deterioration of the movement resistance of the piston due to the baffle plate.
  • FIG. 1 is a schematic side view of the front of a vehicle; FIG. It is an upper perspective view of an oil pan unit.
  • FIG. 4 is a top perspective view of a baffle plate; It is a top view of an oil pan unit.
  • FIG. 5 is a cross-sectional view of the cylinder block and the oil pan unit as seen from the II cross section in FIG. 4; 6 is an enlarged view of a frame F in FIG. 5 for explaining intake and exhaust of a second cylinder and a third cylinder;
  • FIG. 6 is an enlarged view of a frame F in FIG. 5 for explaining intake and exhaust of a second cylinder and a third cylinder;
  • FIG. 4 is a top view of the oil pan unit, explaining intake and exhaust of the second cylinder and the third cylinder;
  • FIG. 1 a schematic side view of the front of a vehicle 1 is shown.
  • a vehicle 1 is a passenger car in which an engine 5 is arranged vertically in an engine room 3 formed in the front part.
  • the vehicle 1 can run by transmitting the driving force generated by the engine 5 to the wheels 9 .
  • the engine 5 is an in-line four-cylinder internal combustion engine that can operate by burning fuel supplied from a fuel tank (not shown) to generate driving force.
  • This engine 5 has a cylinder block 11 , a cylinder head 13 and an oil pan unit 15 .
  • the cylinder block 11 is a metal block with a cylinder 11a formed therein.
  • a piston 11b is arranged in a cylinder 11a so as to be slidable in a substantially vertical direction, and the sliding of the piston 11b rotates a crankshaft 11c.
  • the oil pan unit 15 includes an oil pan 21 in which oil circulating inside the engine 5 is stored. That is, the oil drips from the cylinder block 11 into the oil pan unit 15 , is supplied to the cylinder head 13 and the cylinder block 11 by the pump 17 , circulates in the engine 5 again, and drips into the oil pan unit 15 .
  • the oil pan unit 15 has an oil pan 21 , a strainer 31 and a baffle plate 33 .
  • the upper end of the oil pan 21 is attached to the lower end of the cylinder block 11 via an oil seal (not shown).
  • strainer 31 is an oil passage extending in the horizontal direction (vehicle front-rear direction in the present embodiment) in which a suction passage 41, an introduction passage 43, and a discharge passage 45 are formed.
  • horizontal direction refers to the longitudinal direction of the vehicle 1 or the width direction of the vehicle, and the term “horizontally extending” includes a direction inclined with respect to the horizontal plane.
  • the intake passage 41 is a pipe-shaped oil passage with an opening 41a formed in the lower side of the oil pan 21 and extending upward from the opening 41a.
  • the introduction passage 43 is a pipe-shaped oil passage that extends from the upper end of the suction passage 41 forward in the vehicle front-rear direction and is inclined at a predetermined angle with respect to the horizontal.
  • the discharge passage 45 is an opening that opens upward from the front end of the introduction passage 43 and is connected to the pump 17 so that oil can be discharged.
  • a mounting leg 39 is provided at the rear end of the introduction path 43 of the strainer 31 . The mounting leg 39 extends rearward from the rear end of the introduction passage 43 and is fixed to the oil pan 21 at its rear end.
  • a support wall 39 a extending upward is formed on the upper portion of the mounting leg 39 .
  • the support wall 39a extends upward from the upper surface of the baffle plate 33, and extends from the rear end of the mounting leg 39 to the front of a bent portion 33a, which will be described later.
  • the baffle plate 33 is formed with a first baffle 51, a second baffle 52, a right wall (wall portion) 53, a left wall (wall portion) 55, a rear wall (wall portion) 57, and a gauge hole 59.
  • the first baffle 51 is a flat plate portion extending in the lateral direction of the vehicle from the introduction path 43 of the strainer 31 . Since the first baffle 51 extends in parallel with the introduction path 43, it extends at a predetermined angle with respect to the horizontal direction in the longitudinal direction of the vehicle.
  • the second baffle 52 is a flat plate portion extending rearward from the rear end of the first baffle 51 . The second baffle 52 extends horizontally.
  • the connecting portion between the first baffle 51 and the second baffle 52 is referred to as a bent portion 33a.
  • the bent portion 33a provided on the baffle plate 33 on the left side of the strainer 31 extends forward while being inclined away from the strainer 31. As shown in FIG.
  • the right wall 53 is a flat plate portion extending upward from the right end of the first baffle 51 .
  • the left wall 55 is a flat plate portion extending upward from the left end of the second baffle 52 .
  • the rear wall 57 is a flat plate portion extending upward from the rear ends of the left and right second baffles 52 .
  • the left side of the rear wall 57 is connected to the rear end of the left wall 55, and the right side of the rear wall 57 is separated from the rear end of the right wall 53 to form a third passage (open portion) 23c, which will be described later.
  • a gauge hole 59 is an opening formed on the front left side of the first baffle 51, and a level gauge for detecting the amount of oil is inserted therethrough.
  • the first mounting portion 35 and the second mounting portion 37 are formed to protrude upward from the first baffle 51 so as to be continuous from the front end of the right wall 53 and the front end of the left wall 55, respectively.
  • the mounting leg 39 is a mounting portion that extends rearward from the rear end of the introduction passage 43 of the strainer 31 and that is fixed to the oil pan 21 at the rear end.
  • the mounting leg 39 is formed with a pair of left and right support walls 39a extending upward from the upper portion.
  • the laterally inner sides of the second baffle 52 and the rear wall 57 are fixed to the support wall 39a.
  • the baffle plate 33 Since the front ends of both the left and right first baffles 51 are freed from wall portions, the baffle plate 33 has a first passage 23a corresponding to the front end portion of the left first baffle 51 and the right first baffle 51. A second passage 23b corresponding to the front end portion of is formed. A third passage 23c is formed between the right wall 53 and the rear wall 57 behind the right end of the second baffle 52 on the right side.
  • the first passage (opening portion) 23a opens to a left front range (opening region) A1 in the oil pan unit 15.
  • the third passage 23c opens to a right rear range (open area) A2 in the oil pan unit 15.
  • the oil pan 21 has ranges (open areas) A1 and A2 separated from the baffle plate 33 by a predetermined distance or more when viewed in the horizontal direction.
  • Ranges A1 and A2 are regions within the oil pan 21 that do not overlap with the baffle plate 33 when viewed from above, and are ranges formed to have a larger volume than other ranges.
  • the ranges A1 and A2 may be formed by separating the side wall of the oil pan 21 from the end of the baffle plate 33 by a certain distance or more, or by increasing the depth of the oil pan 21 compared to other areas.
  • the volume of range A2 is expanded by an expanded portion 21a that expands to the outside of oil pan 21 from the sealing surface of oil pan 21 (the hatched portion in FIG. 4).
  • a sectional view of the cylinder block 11 and the oil pan unit 15 viewed from the II section in FIG. 4 is shown.
  • a cylinder block 11 has four cylinders 11a arranged in the front-rear direction.
  • the four cylinders 11a are referred to as a first cylinder C1, a second cylinder C2, a third cylinder C3 and a fourth cylinder C4 in order from the front side.
  • the lower end of the cylinder 11a is open at the lower surface of the cylinder block 11, and in the area below the piston 11b in the cylinder 11a, negative pressure and positive pressure are generated due to sliding of the piston 11b (see FIG. 1). Specifically, when the piston 11b is ascending, the area below the piston 11b in the cylinder 11a becomes negative pressure, and when the piston 11b is descending, the area below the piston 11b inside the cylinder 11a becomes negative pressure. The area becomes positive pressure.
  • the pistons 11b in the first cylinder C1 and the third cylinder C3 move in the same phase in the vertical direction, and the pistons 11b in the second cylinder C2 and the fourth cylinder C4 move toward the first cylinder C1 and the third cylinder C4.
  • FIG. 6 and 7 show enlarged views of the frame F in FIG. 5 for explaining the intake and exhaust of the second cylinder C2 and the third cylinder C3.
  • FIG. 8 the airflow in the top view of the oil pan unit 15 for explaining the intake and exhaust of the second cylinder C2 and the third cylinder C3 is shown.
  • the regions of the second cylinder C2 and the third cylinder C3 below the piston 11b suck air from the oil pan 21 when the internal pressure becomes negative, and discharge air to the oil pan 21 when the internal pressure becomes positive.
  • the first baffle 51 and the second baffle 52 are located below the second cylinder C2 and the third cylinder C3 in the piston sliding direction. Therefore, the air discharged from the second cylinder C2 and the third cylinder C3 is discharged toward the first baffle 51 and the second baffle 52.
  • the first baffle 51 is inclined upward toward the front from the bent portion 33a at an angle ⁇ 1 with respect to a line (hereinafter referred to as a reference line) that is perpendicular to the sliding direction of the piston and extends in the front-rear direction. is formed to Further, the second baffle 52 is formed at an angle ⁇ 2 with respect to the reference line so as to be inclined upward toward the rear from the bent portion 33a.
  • a reference line a line that is perpendicular to the sliding direction of the piston and extends in the front-rear direction.
  • the second baffle 52 is formed at an angle ⁇ 2 with respect to the reference line so as to be inclined upward toward the rear from the bent portion 33a.
  • the reference line is also inclined with respect to the horizontal plane.
  • the bent portion 33a extends below the cylinder wall between the second cylinder C2 and the third cylinder C3, that is, in the range between the two broken lines in FIG. It is located in a range that overlaps with the bottom edge of the .
  • the first baffle 51 is formed with a region positioned below the second cylinder C2 and not positioned below the third cylinder C3.
  • the second baffle 52 is formed with a region positioned below the third cylinder C3 and not positioned below the second cylinder C2.
  • the center of each cylinder 11a is located on the baffle plate 33 on the left side of the strainer 31 when viewed from the piston sliding direction.
  • the bent portion 33a of the baffle plate 33 on the left side of the strainer 31 inclines forward as it moves away from the strainer 31, but is positioned below the line connecting the centers of the second cylinder C2 and the third cylinder C3 of the bent portion 33a. It is preferable that the periphery of the part where the pressure is applied is located below the cylinder wall.
  • the air discharged from the second cylinder C2 is guided rearward and downward by the first baffle 51, and then guided rearward and upward by the second baffle 52 (see FIG. 6).
  • the air discharged from the third cylinder C3 is guided forward and downward by the second baffle 52, and then guided forward and upward by the first baffle 51 (see FIG. 7). Therefore, even if the first baffle 51 and the second baffle 52 are located below the second cylinder C2 and the third cylinder C3 in the sliding direction of the piston, the air discharged from the second cylinder C2 and the third cylinder C3 can flow. can be made suitable, and the operating resistance generated when the piston 11b slides can be reduced.
  • the baffle plate 33 is inclined toward the lower surface of the cylinder block 11 toward both ends (both edges) in the vehicle longitudinal direction (predetermined direction).
  • the baffle plate 33 is bent along a bent portion 33a extending in a direction intersecting the longitudinal direction of the vehicle in the horizontal direction, and the bent portion 33a is formed at a position corresponding to between the adjacent cylinders 11a.
  • a region is formed in which only the first baffle 51 is positioned below one cylinder 11a and only the second baffle 52 is positioned below the other cylinder 11a. and the airflow along the second baffle 52 can be suppressed from interfering in the vicinity of the bent portion 33a.
  • a rear wall 57 extending upward is formed at the end of the baffle plate 33 on the rear side in the vehicle front-rear direction, so that the flow direction of the air moving rearward and upward along the second baffle 52 is further upward. can be controlled.
  • the second baffle 52 has a shorter length in the longitudinal direction of the vehicle than the first baffle 51, and thus has a lower ability to guide the airflow. Therefore, the ability of the second baffle 52 to guide the airflow is improved by providing a rear wall 57 at the rear end portion in the vehicle front-rear direction of the second baffle 52 having a short length in the vehicle front-rear direction.
  • a wall portion may be provided at the front end of the first baffle 51 in the vehicle front-rear direction. Furthermore, in this embodiment, since the second baffle 52 extends along the horizontal plane, the second baffle 52 may sink into the oil when the oil level rises. In such a case, the ability of the second baffle 52 to guide the airflow is reduced, so the ability to guide the airflow is ensured by extending the rear wall 57 to a position higher than the oil surface.
  • a right wall 53, a left wall 55, and a rear wall 57 extending upward are formed on the peripheral edge of the baffle plate 33, and wall portions are provided on at least a portion of the portion of the baffle plate 33 that contacts the ranges A1 and A2.
  • a first passage 23a and a third passage 23c, which are open to ranges A1 and A2, are formed. Therefore, of the air moving along the baffle plate 33, the air that has not been sucked into the cylinder 11a can be controlled to move toward the areas A1 and A2 in the oil pan 21 having relatively large capacities.
  • the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the invention.
  • the engine 5 is arranged vertically with respect to the vehicle 1, but it may be arranged horizontally.
  • the second baffle 52 is formed horizontally, but it may be inclined at a gentler angle (second angle) than the first baffle 51 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
PCT/JP2022/003189 2021-01-29 2022-01-27 エンジン WO2022163785A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2022578496A JP7473019B2 (ja) 2021-01-29 2022-01-27 エンジン

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021012934 2021-01-29
JP2021-012934 2021-01-29

Publications (1)

Publication Number Publication Date
WO2022163785A1 true WO2022163785A1 (ja) 2022-08-04

Family

ID=82653527

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PCT/JP2022/003189 WO2022163785A1 (ja) 2021-01-29 2022-01-27 エンジン

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Country Link
JP (1) JP7473019B2 (enrdf_load_stackoverflow)
WO (1) WO2022163785A1 (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647611A (en) * 1979-09-25 1981-04-30 Yamaha Motor Co Ltd Oil pan
JPS6271358U (enrdf_load_stackoverflow) * 1985-10-22 1987-05-07
US20160333752A1 (en) * 2015-05-15 2016-11-17 E.P. Barrus Limited Sump and an engine
CN107489478A (zh) * 2016-11-10 2017-12-19 宝沃汽车（中国）有限公司 一种发动机及其油底壳总成和油底壳挡油装置
JP2019157861A (ja) * 2019-07-02 2019-09-19 本田技研工業株式会社 バッフルプレート
JP2019210886A (ja) * 2018-06-06 2019-12-12 三菱自動車工業株式会社 内燃機関

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH085295Y2 (ja) * 1990-10-05 1996-02-14 本田技研工業株式会社 エンジンのバッフルプレート装置
JP4577264B2 (ja) * 2006-05-11 2010-11-10 トヨタ自動車株式会社 オイル整流構造
JP2010065595A (ja) * 2008-09-10 2010-03-25 Toyota Motor Corp 内燃機関のバッフルプレート構造

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647611A (en) * 1979-09-25 1981-04-30 Yamaha Motor Co Ltd Oil pan
JPS6271358U (enrdf_load_stackoverflow) * 1985-10-22 1987-05-07
US20160333752A1 (en) * 2015-05-15 2016-11-17 E.P. Barrus Limited Sump and an engine
CN107489478A (zh) * 2016-11-10 2017-12-19 宝沃汽车（中国）有限公司 一种发动机及其油底壳总成和油底壳挡油装置
JP2019210886A (ja) * 2018-06-06 2019-12-12 三菱自動車工業株式会社 内燃機関
JP2019157861A (ja) * 2019-07-02 2019-09-19 本田技研工業株式会社 バッフルプレート

Also Published As

Publication number Publication date
JP7473019B2 (ja) 2024-04-23
JPWO2022163785A1 (enrdf_load_stackoverflow) 2022-08-04

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