WO2023238179A1 - 内燃機関 - Google Patents

内燃機関 Download PDF

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Publication number
WO2023238179A1
WO2023238179A1 PCT/JP2022/022740 JP2022022740W WO2023238179A1 WO 2023238179 A1 WO2023238179 A1 WO 2023238179A1 JP 2022022740 W JP2022022740 W JP 2022022740W WO 2023238179 A1 WO2023238179 A1 WO 2023238179A1
Authority
WO
WIPO (PCT)
Prior art keywords
internal combustion
combustion engine
front cover
main body
oil
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/JP2022/022740
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
正 矢部
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2024526028A priority Critical patent/JP7816511B2/ja
Priority to PCT/JP2022/022740 priority patent/WO2023238179A1/ja
Publication of WO2023238179A1 publication Critical patent/WO2023238179A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

  • the present invention relates to an internal combustion engine.
  • Patent Document 1 there is disclosed a mechanism that is fixed to the outer wall surface of the cylinder block (the outer wall surface on one side in the axial direction of the crankshaft) and is connected to the cylinder block for transmitting the rotation of the crankshaft to the camshaft or oil pump.
  • a chain case is disclosed that forms a chain chamber that accommodates a chain and a sprocket. A lower portion of this chain chamber communicates with the inside of the oil pan.
  • Patent Document 1 no consideration is given to increasing the amount of oil stored inside without causing an increase in the oil level.
  • the internal combustion engine of the present invention includes a front cover that covers an end face of the internal combustion engine main body on one end side in the cylinder row direction and forms an oil-tight space between it and the end face of the internal combustion engine main body on the one end side in the cylinder row direction. have.
  • a bulge is formed in the lower part of the front cover, and the bulge protrudes in a direction away from the end face of the internal combustion engine main body on one end side in the cylinder row direction, and expands the volume between the front cover and the internal combustion engine main body. ing.
  • an internal combustion engine can increase the amount of oil stored between the front cover and the internal combustion engine main body while suppressing the rise in the oil level of the oil stored between the front cover and the internal combustion engine main body. can.
  • FIG. 1 is an explanatory diagram schematically showing a schematic configuration of an internal combustion engine to which the present invention is applied.
  • FIG. 1 is an explanatory diagram schematically showing one end side in a cylinder row direction of an internal combustion engine to which the present invention is applied.
  • Front view of the front cover. Rear view of the front cover.
  • a perspective view of the front cover. A side view of the front cover.
  • FIG. 1 is an explanatory diagram schematically showing a state in which an internal combustion engine to which the present invention is applied is mounted on a vehicle.
  • the X axis is an axis along the longitudinal direction of the internal combustion engine 1 (an axis parallel to the central axis of the crankshaft of the internal combustion engine 1)
  • the Y axis is the horizontal direction of the internal combustion engine 1 (internal combustion engine width direction).
  • the axis along the axis A and the Z axis respectively indicate an axis along the vertical direction of the internal combustion engine 1 (an axis parallel to the cylinder axis A of the internal combustion engine 1). That is, the X-axis is an axis along the cylinder row direction of the internal combustion engine 1 or the internal combustion engine main body 8 (described later). Further, the Y-axis is an axis along the width direction of the internal combustion engine main body 8.
  • FIG. 1 is an explanatory diagram schematically showing a schematic configuration of an internal combustion engine 1 to which the present invention is applied.
  • the internal combustion engine 1 is, for example, an in-line multi-cylinder internal combustion engine, and includes a cylinder head 2, a cylinder block 3 attached to the lower part of the cylinder head 2, a cam bracket 4 attached to the upper part of the cylinder head 2, and cylinders.
  • the engine has an upper oil pan 5 attached to the lower part of the block 3, an oil pan lower 6 attached to the lower part of the upper oil pan 5, and a front cover 7 that covers the front surface of the internal combustion engine main body 8.
  • the cylinder head 2, cylinder block 3, cam bracket 4, and oil pan upper 5 constitute an internal combustion engine main body 8.
  • the inner surface 7a of the front cover 7 faces the end surface 8a of the internal combustion engine main body 8 at one end in the cylinder row direction, and the inner surface 7a covers the end surface 8a.
  • the outer surface 7b of the front cover 7 faces outward.
  • the front cover 7 has a vertical wall 7c that is continuous along the entire outer periphery. The vertical wall 7c is formed to extend in the direction along the X-axis.
  • the cylinder head 2 is a cast product made of a metal material such as an aluminum alloy, and has an intake port (not shown) that supplies intake air to a combustion chamber (not shown) and exhaust air from the combustion chamber (not shown).
  • An exhaust port (not shown) is formed for exhaust.
  • the cylinder block 3 is a cast product made of a metal material such as an aluminum alloy, and is formed with a number of cylinders (not shown) corresponding to the number of cylinders.
  • the cam bracket 4 is made of a metal material such as aluminum alloy, and supports the camshaft 10 (see FIG. 2) rotatably together with the cylinder head 2.
  • the oil pan upper 5 is made of a metal material such as an aluminum alloy, and together with the cylinder block 3 constitutes a crankcase (not shown) in which a crankshaft (not shown) is housed.
  • the oil pan lower 6 is made of a synthetic resin material such as polyamide, and stores lubricating oil.
  • the front cover 7 is made of a synthetic resin material such as polyamide, and is attached to the internal combustion engine main body 8 in a liquid-tight manner so as to cover the front surface of the internal combustion engine main body 8. More specifically, the front cover 7 is attached to the front surface of the cylinder block 3, the front surface of the cylinder head 2, the front surface of the cam bracket 4, and the front surface of the oil pan upper 5 by bolts (not shown). In other words, the front cover 7 is attached to the internal combustion engine main body 8 so as to cover one end surface of the cylinder block 3 and the cylinder head 2 in the crankshaft axial direction, that is, one end surface 8a of the internal combustion engine main body 8 in the cylinder row direction. It is attached.
  • a synthetic resin material such as polyamide
  • the front cover 7 has a shallow dish shape, and is connected to the front surface of the internal combustion engine main body 8, which is an end surface 8a on one end side of the internal combustion engine main body 8 in the cylinder row direction.
  • a space 9 communicating with the oil storage space is formed.
  • FIG. 2 is an explanatory diagram schematically showing one end side of the internal combustion engine 1 in the cylinder row direction in a plan view.
  • the space 9 accommodates a cam sprocket 11 fixed to the front end of the camshaft 10 and a crank sprocket 12 fixed to the crankshaft (see FIG. 3).
  • a timing chain (not shown) for transmitting rotational power is wound around the cam sprocket 11 and crank sprocket 12.
  • An intake cam sprocket 11a and a variable phase mechanism (variable valve mechanism) 13 are attached to the front end of the intake camshaft 10a.
  • the phase variable mechanism 13 changes the valve timing of the intake valve by changing the phase of the lift center angle of the intake valve.
  • An exhaust cam sprocket 11b is attached to the front end of the exhaust camshaft 10b.
  • the front cover 7 is continuous with the crankshaft through hole 14, the first bolt through hole 15, the second bolt through hole 16, the through holes 17 and 18, and the space 9.
  • the front cover 7 has a gauge insertion port 19 formed as shown in FIG.
  • FIG. 3 is a front view of the front cover 7.
  • FIG. 4 is a rear view of the front cover 7.
  • FIG. 5 is a perspective view of the front cover 7.
  • FIG. 6 is a side view of the front cover 7.
  • the crankshaft through hole 14 is a hole through which a crankshaft (not shown) passes.
  • the first bolt through holes 15 are through which bolts (not shown) that fix the front cover 7 to the internal combustion engine main body 8 pass, and a plurality of first bolt through holes 15 are formed on the outer peripheral edge of the front cover 7.
  • a plurality of second bolt through holes 16 are formed in the front cover 7 (at five locations) through which bolts (not shown) that fix parts other than the outer peripheral edge of the front cover 7 to the internal combustion engine main body 8 pass. ing.
  • the through holes 17 and 18 are holes through which a part of a mount bracket (not shown) for fixing the internal combustion engine 1 to the vehicle body passes.
  • the gauge insertion port 19 is a hole formed through the upper part of the front cover 7.
  • the front cover 7 has a protruding guide rib 31 rising from the inner surface 7a.
  • the guide rib 31 guides (the tip side of) an oil level gauge (not shown) inserted from the gauge insertion port 19 to the back side of the bulge 20 .
  • the guide rib 31 includes an oil level gauge passage 32 (indicated by the thick broken line in FIG. 4), which is a tunnel-shaped passage through which the oil level gauge passes, together with the inner surface 7a of the front cover 7 and the end face 8a of the internal combustion engine main body 8 on one end side in the cylinder row direction. ) is formed in space 9.
  • the guide ribs 31 include a first guide rib row 33 extending in the vertical direction of the front cover 7 (direction along the Z axis), and a first guide rib row 33 extending in the width direction of the front cover 7 (direction along the Y axis). It consists of second guide rib rows 34 facing each other at a predetermined distance apart.
  • the first guide rib row 33 and the second guide rib row 34 face each other with an interval such that an oil level gauge can be inserted therein.
  • the second guide rib row 34 is located closer to the inner circumference of the front cover 7 than the first guide rib row 33 when viewed in the X-axis direction as shown in FIG. 3 or 4 .
  • the first guide rib row 33 has a plurality of first ribs 35 arranged in series along the vertical direction of the front cover 7 (direction along the Z axis).
  • the front cover 7 has first guide rib rows 33, which are arranged in order from above in the vertical direction of the front cover 7, such as a first rib 35a, a first rib 35b, a first rib 35c, a first rib 35d, a first rib 35e, and a first rib 35a.
  • 1 rib 35f is formed.
  • These first ribs 35 are formed along the outer peripheral edge of the front cover 7 so as to be spaced apart from each other in the vertical direction of the front cover 7 (direction along the Z axis).
  • the second guide rib row 34 has a plurality of second ribs 36 arranged in series along the vertical direction of the front cover 7 (direction along the Z axis).
  • a second rib 36a, a second rib 36b, a second rib 36c, a second rib 36d, and a second rib 36e are formed as a second guide rib row 34 in order from above in the vertical direction of the front cover 7. has been done.
  • the plurality of second ribs 36 are spaced apart from each other along the vertical direction of the front cover 7 (direction along the Z-axis).
  • the bulging portion 20 is formed to protrude toward the outer surface 8b and is capable of storing oil on the inner surface 7a.
  • the bulging portion 20 protrudes in a direction away from an end surface 8a of the internal combustion engine main body 8 on one end side in the cylinder row direction, and has an oil storage space in which oil can be stored on the inner surface 7a side.
  • the bulging portion 20 is thinned from the inner surface 7a side, and the inner surface 7a side serves as an oil storage space (recess) in which oil can be stored. That is, the front cover 7 has a bulging portion 20 that increases the volume between the front cover 7 and the end surface 8a of the internal combustion engine main body 8 on one end side in the cylinder row direction.
  • the bulging portion 20 is formed at the lower end in the vertical direction (direction along the Z axis) so as to follow the outer shape of the suspension member 41 of the vehicle when the internal combustion engine 1 is mounted on the vehicle. It is formed in a shape in which the sides are constituted by an inclined surface 20a.
  • the inclined surface 20a is formed to have an inclination that is not perpendicular to a plane including the X-axis and the Y-axis (XY plane), but obliquely intersects with the XY plane.
  • the bulging portion 20 has a shape cut off diagonally so that the lower end side in the vertical direction (direction along the Z axis) follows the outer shape of the suspension member 41. This cut-off portion becomes the inclined surface 20a.
  • the front cover 7 has a bulge 20 formed in a shape that follows the outer shape of the suspension member 41 of the vehicle when the internal combustion engine 1 is mounted on the vehicle.
  • the internal combustion engine 1 of the above-described embodiment has an oil container that protrudes outward from the lower part of the front cover 7 and can store oil on the inner surface 7a side facing the end surface 8a on one end side in the cylinder row direction of the internal combustion engine main body 8. It has a bulge 20 in which a storage space is formed.
  • the internal combustion engine 1 increases the amount of oil stored between the front cover 7 and the internal combustion engine main body 8 while suppressing the rise in the oil level of the oil stored between the front cover 7 and the internal combustion engine main body 8. be able to.
  • the internal combustion engine 1 can increase the amount of oil stored while suppressing the rise in the oil level B (see FIG. 7), thereby suppressing the agitation of the oil by rotating objects and the resistance due to this agitation (agitation resistance). can do.
  • the internal combustion engine 1 can increase the amount of oil stored, the frequency of oil changes can be reduced.
  • the rigidity of the front cover 7 is maintained even if the front cover 7 is made of resin, and membrane vibration of the front cover 7 can be suppressed. .
  • the internal combustion engine 1 has a guide rib 31 that guides the oil level gauge between the bulge 20 and the end surface 8a of the internal combustion engine main body 8 on one end side in the cylinder row direction.
  • the oil level gauge measures the oil level B stored in the bulging portion 20 between the end surface 8a of the internal combustion engine main body 8 on one end side in the cylinder row direction and the front cover 7.
  • the volume of the front cover 7 of the internal combustion engine 1 is greatly increased at the bulging portion 20. Therefore, in the internal combustion engine 1, oil easily collects in the bulge 20 as an oil reservoir, so that the reliability of oil level measurement can be improved.
  • the guide ribs 31 can be easily formed.
  • the internal combustion engine 1 is formed in such a shape that the bulging portion 20 of the front cover 7 follows the outer shape of the suspension member 41 of the vehicle when it is mounted on the vehicle.
  • the internal combustion engine 1 can be arranged so as to partially overlap the suspension member 41 of the vehicle located near the bottom of the internal combustion engine 1 in the vehicle height direction and the vehicle width direction, as shown by double-ended arrows in FIG. This makes it possible to improve the ease of mounting on a vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
PCT/JP2022/022740 2022-06-06 2022-06-06 内燃機関 Ceased WO2023238179A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2024526028A JP7816511B2 (ja) 2022-06-06 2022-06-06 内燃機関
PCT/JP2022/022740 WO2023238179A1 (ja) 2022-06-06 2022-06-06 内燃機関

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/022740 WO2023238179A1 (ja) 2022-06-06 2022-06-06 内燃機関

Publications (1)

Publication Number Publication Date
WO2023238179A1 true WO2023238179A1 (ja) 2023-12-14

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ID=89117914

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Application Number Title Priority Date Filing Date
PCT/JP2022/022740 Ceased WO2023238179A1 (ja) 2022-06-06 2022-06-06 内燃機関

Country Status (2)

Country Link
JP (1) JP7816511B2 (https=)
WO (1) WO2023238179A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006316627A (ja) * 2005-05-10 2006-11-24 Mazda Motor Corp エンジン構造
JP2015034528A (ja) * 2013-08-09 2015-02-19 本田技研工業株式会社 内燃機関のケース部材
JP2019183812A (ja) * 2018-04-17 2019-10-24 トヨタ自動車株式会社 オイル貯留構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006316627A (ja) * 2005-05-10 2006-11-24 Mazda Motor Corp エンジン構造
JP2015034528A (ja) * 2013-08-09 2015-02-19 本田技研工業株式会社 内燃機関のケース部材
JP2019183812A (ja) * 2018-04-17 2019-10-24 トヨタ自動車株式会社 オイル貯留構造

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JP7816511B2 (ja) 2026-02-18

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