JP2017048740A - Oil feeding member, and lubricating oil supply mechanism for engine including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil feeding member capable of preventing the excessive supply of lubricating oil to a lubrication part of a valve train.SOLUTION: An oil feeding member 100 for supplying lubricating oil to the lubrication part of the valve train which opens/closes an intake valve and an exhaust valve of an engine includes an oil filler port 250 into which the lubricating oil is supplied, discharge ports for discharging the lubricating oil to the lubrication part, an oil path for guiding the lubricating oil from the oil filler port 250 to the discharge ports, and a pressure loss imparting member 300 arranged in the middle of the oil path for imparting pressure loss to the lubricating oil.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an oil supply member that supplies lubricating oil to a lubricating portion of a valve operating mechanism that opens and closes an intake / exhaust valve of an engine, and a technology of an engine oil supply mechanism that includes the oil supply member.

  2. Description of the Related Art Conventionally, a technique of an oil supply member that supplies lubricating oil to a lubricating portion of a valve operating mechanism that opens and closes an intake / exhaust valve of an engine is known. For example, as described in Patent Document 1.

  Patent Document 1 describes an oil supply member attached to a cam cap of an engine. The oil supply member includes an oil supply port to which the lubricant is supplied, a plurality of discharge ports for discharging the lubricant, a root oil passage for guiding the lubricant from the oil supply port to the vicinity of the plurality of discharge ports, and a base oil passage And a derived oil passage for guiding the lubricating oil from each to a plurality of discharge ports. Lubricating oil guided by an oil passage such as an oil gallery of the cylinder head is supplied to the oil supply member.

  In such a configuration, lubricating oil supplied from an oil passage such as an oil gallery via an oil supply port is discharged from the oil supply member via a plurality of discharge ports. Thereby, lubricating oil can be supplied to the lubrication part (cam of a camshaft) of the valve operating mechanism arrange | positioned under the said oil supply member.

  However, the technique described in Patent Literature 1 is based on intermittent oil supply in which lubricating oil is intermittently supplied to the oil supply member. Therefore, for example, when intermittent lubrication is not possible, if the lubrication oil is continuously supplied to the lubrication member, the lubrication oil may be excessively supplied to the lubrication part of the valve mechanism.

JP, 2014-163310, A

  The present invention has been made in view of the situation as described above, and the problem to be solved is an oil supply member capable of preventing excessive supply of lubricating oil to a lubricating portion of a valve operating mechanism, and The present invention provides a lubricating oil supply mechanism for an engine equipped with the same.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, an oil supply member that supplies lubricating oil to a lubricating portion of a valve mechanism that opens and closes an intake / exhaust valve of an engine, the oil supply port to which the lubricating oil is supplied, and the lubricating oil A discharge port that discharges to the lubrication part, an oil passage that guides the lubricating oil from the oil supply port to the discharge port, and a pressure loss application that is disposed in the middle of the oil passage and imparts pressure loss to the lubricant And a member.

  According to a second aspect of the present invention, a member accommodating chamber for accommodating the pressure loss applying member is formed in the middle of the oil passage.

  According to a third aspect of the present invention, the pressure loss imparting member forms a labyrinth structure.

  In Claim 4, The said discharge port is formed in multiple numbers, The said oil path is the basic oil path which guides the said lubricating oil supplied via the said oil supply port to the vicinity of these discharge ports, and the said lubricating oil A plurality of derived oil passages that respectively guide the oil from the root oil passage to the plurality of discharge ports, and the pressure loss imparting member includes at least two of the plurality of derived oil passages in the root oil passage. It is arrange | positioned upstream from an oil path.

  In Claim 5, the said pressure loss provision member is arrange | positioned only in one part among the some parts divided by the connection part with the said derived oil path in the said root oil path, and it supplies via the said oil filler opening. The lubricating oil to be used is first guided to the one part.

  In Claim 6, it comprises the oil supply member as described in any one of Claim 1-5.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, it is possible to prevent the lubricating oil from being excessively supplied to the lubricating portion of the valve operating mechanism.

  In Claim 2, pressure loss can be provided to lubricating oil in a predetermined position.

  According to the third aspect of the present invention, it is possible to further increase the pressure loss applied to the lubricating oil, thereby preventing the excessive supply of the lubricating oil to the lubricating portion of the valve operating mechanism.

  According to the fourth aspect of the present invention, it is possible to prevent excessive supply of lubricating oil from two or more discharge ports to the lubricating portion of the valve operating mechanism with a single pressure loss applying member.

  According to the fifth aspect of the present invention, it is possible to prevent excessive supply of the lubricating oil from the plurality of discharge ports to the lubricating portion of the valve operating mechanism with a single pressure loss applying member.

  According to the sixth aspect of the present invention, it is possible to prevent the lubricating oil from being excessively supplied to the lubricating portion of the valve operating mechanism.

Sectional drawing which shows the inside of the cylinder head cover of the engine which concerns on one Embodiment of this invention. The top view which shows a cam cap and an oil supply member. AA sectional drawing in FIG. The perspective view which shows an oil supply member. The top view which shows a pressure loss provision member. The partial plane sectional view which shows the state by which the pressure loss provision member is arrange | positioned at the oil path formation member. (A) BB sectional drawing of FIG. (B) CC sectional drawing of FIG. (C) DD sectional drawing of FIG. (D) EE sectional drawing of FIG. The top view which shows the oil-path formation member before bending. The schematic diagram of the oil supply member for showing the flow of lubricating oil. The exploded view which shows the pressure loss provision member which concerns on 2nd embodiment of this invention. The partial plane sectional view which shows the state by which the pressure loss provision member which concerns on 2nd embodiment of this invention is arrange | positioned at the oil path formation member. The partial plane sectional view which shows the state by which the pressure loss provision member which concerns on 3rd embodiment of this invention was arrange | positioned at the oil path formation member.

  In the following, the directions indicated by arrow U, arrow D, arrow F, arrow B, arrow L and arrow R in the figure are defined as upward, downward, forward, backward, leftward and rightward, respectively. To explain.

  First, the structure of the engine 1 which comprises the oil supply member 100 which concerns on one Embodiment of this invention, and a lubricating oil supply mechanism is demonstrated using FIGS. 1-3.

  The engine 1 according to this embodiment is a DOHC gasoline engine having an in-line 4-cylinder 8-valve. In this embodiment, the configuration of four cylinders and eight valves (two valves per cylinder) is illustrated for convenience (for simplification of explanation), but other multi-valves (three valves or more per cylinder) are illustrated. This configuration can also be applied as appropriate. The engine 1 mainly includes a cylinder head 10, a cylinder head cover 20, a valve mechanism 30, a cam cap 50, and an oil supply member 100.

  The cylinder head 10 shown in FIG.1 and FIG.3 becomes a main structure of the engine 1 with a cylinder block (not shown). The cylinder head 10 is fixed to the upper part of the cylinder block. The cylinder head 10 mainly includes an intake side bearing portion 12, an exhaust side bearing portion 14, an oil gallery 16, a cam journal oil passage 18 and a bearing portion oil passage 19.

  The intake side bearing portion 12 shown in FIG. 1 supports an intake side camshaft 40, which will be described later, so as to be rotatable from below. The intake-side bearing portion 12 is formed on the left portion of the cylinder head 10 so as to be a semicircular recess that is open upward in a front view. Three intake side bearing portions 12 are formed at approximately equal intervals in the front-rear direction.

  The exhaust-side bearing portion 14 shown in FIGS. 1 and 3 supports an exhaust-side camshaft 42, which will be described later, so as to be rotatable from below. The exhaust-side bearing portion 14 is formed on the right portion of the cylinder head 10 so as to be a semicircular recess that is open upward in a front view. Three exhaust-side bearing portions 14 are formed at approximately the same interval in the front-rear direction at the same position as the intake-side bearing portion 12 in the front-rear direction.

  The oil gallery 16 shown in FIGS. 1 and 3 is an oil passage for guiding lubricating oil to each part of the engine 1 (for example, a lash adjuster 38 described later). The oil gallery 16 is formed so as to pass near the left and right side walls of the cylinder head 10 in the front-rear direction.

  The cam journal oil passage 18 shown in FIG. 3 is an oil passage formed in the right portion of the cylinder head 10 for guiding the lubricating oil to the exhaust-side bearing portion 14. One end of the cam journal oil passage 18 communicates with the oil gallery 16. The other end of the cam journal oil passage 18 is formed to extend in the upper left direction toward the exhaust-side bearing portion 14.

  The bearing oil passage 19 shown in FIG. 3 is an oil for guiding the lubricating oil supplied from the oil gallery 16 via the cam journal oil passage 18 to the exhaust side communication oil passage 66 of the cam cap 50 described later. Road. The bearing portion oil passage 19 is formed at a substantially central portion in the front and rear direction of the exhaust side bearing portion 14. The bearing portion oil passage 19 is formed to extend along the exhaust side bearing portion 14 from the lower right portion to the left end of the exhaust side bearing portion 14. One end of the bearing oil passage 19 communicates with the cam journal oil passage 18. The other end of the bearing oil passage 19 communicates with an exhaust side communication oil passage 66 of the cam cap 50 described later.

  Although not shown in the present embodiment, the cam journal oil passage 18 is also formed in the left portion of the cylinder head 10 and communicates the left oil gallery 16 and the intake side bearing portion 12. . The bearing oil passage 19 is also formed in the intake-side bearing portion 12 and communicates the left cam journal oil passage 18 with an intake-side communication oil passage 58 of a cam cap 50 described later.

  A cylinder head cover 20 shown in FIG. 1 covers the upper part of the cylinder head 10. The cylinder head cover 20 is placed on top of the cylinder head 10 and is appropriately fixed with bolts or the like.

  A valve operating mechanism 30 shown in FIG. 1 is for opening and closing an intake port and an exhaust port (not shown) of the engine 1 at a predetermined timing. The valve mechanism 30 mainly includes an intake valve 32, an exhaust valve 34, rocker arms 36 and 36, lash adjusters 38 and 38, an intake side camshaft 40, and an exhaust side camshaft 42.

  The intake valve 32 opens and closes an intake port (not shown) of the engine 1. The intake valve 32 is disposed such that the longitudinal direction of the rod-shaped valve stem 32a is substantially in the vertical direction. The lower end of the intake valve 32 extends to the intake port. A vertically middle portion of the intake valve 32 is slidably inserted into the cylinder head 10.

  The exhaust valve 34 opens and closes an exhaust port (not shown) of the engine 1. The exhaust valve 34 is disposed so that the longitudinal direction of the rod-shaped valve stem 34a is substantially vertical. The lower end of the exhaust valve 34 extends to the exhaust port. The middle part of the exhaust valve 34 is slidably inserted into the cylinder head 10.

  The rocker arms 36 are for opening and closing the intake valve 32 and the exhaust valve 34. One ends of the rocker arms 36 and 36 are in contact with the upper ends of the intake valve 32 and the exhaust valve 34 from above, respectively. The rocker arms 36 and 36 are respectively provided with rollers 36a and 36a that are rotatable about an axis line in the front-rear direction. The rollers 36a and 36a are respectively brought into contact with a cam 40a and a cam 42a described later from above.

  The lash adjusters 38 and 38 are for adjusting the valve clearance. The lash adjusters 38 and 38 are brought into contact with the other ends of the rocker arms 36 and 36 from below.

  The intake side camshaft 40 shown in FIGS. 1 and 2 is for opening and closing the intake valve 32 by swinging the intake side rocker arm 36 at a predetermined timing. The intake side camshaft 40 is placed on the intake side bearing portion 12 of the cylinder head 10 with its longitudinal direction directed in the front-rear direction. The intake camshaft 40 mainly includes a cam 40a.

  The cam 40 a is for driving the intake valve 32. The cam 40a is formed in a plate shape whose length from the rotation center (center of the intake camshaft 40) to the outer periphery is not constant. One cam 40a is arranged for each cylinder. The cam 40a comes into contact with the intake side rocker arm 36 (more specifically, rollers 36a and 36a) from above.

  The exhaust camshaft 42 shown in FIGS. 1 to 3 is for opening and closing the exhaust valve 34 by swinging the rocker arm 36 on the exhaust side at a predetermined timing. The exhaust side camshaft 42 is placed on the exhaust side bearing portion 14 of the cylinder head 10 with its longitudinal direction directed in the front-rear direction. The exhaust side camshaft 42 mainly includes a cam 42a.

  The cam 42 a is for driving the exhaust valve 34. The cam 42a is formed in a plate shape whose length from the rotation center (the center of the exhaust side camshaft 42) to the outer periphery is not constant. One cam 42a is arranged for each cylinder. The cam 42a comes into contact with the rocker arm 36 (more specifically, the rollers 36a and 36a) on the exhaust side from above.

  The cam cap 50 shown in FIGS. 1 to 3 is fixed to the upper part of the cylinder head 10 and holds the intake side camshaft 40 and the exhaust side camshaft 42 with the cylinder head 10. The cam cap 50 is formed in a substantially rectangular parallelepiped shape with the longitudinal direction facing the left-right direction. Three cam caps 50 are arranged at substantially equal intervals in the front-rear direction at positions corresponding to the intake-side bearing portion 12 and the exhaust-side bearing portion 14 in plan view. The cam cap 50 mainly includes an intake-side bearing portion 52, an intake-side recess 54, an intake-side through hole 56, an intake-side communication oil passage 58, an exhaust-side bearing portion 60, an exhaust-side recess 62, an exhaust-side through-hole 64, and an exhaust-side communication. An oil passage 66 is provided.

  The intake side bearing portion 52 shown in FIG. 1 supports the intake side camshaft 40 so as to be rotatable from above. The intake-side bearing portion 52 is formed on the left portion of the cam cap 50 so as to be a semicircular recess that is open at the bottom when viewed from the front. The intake side bearing portion 52 is formed at a position facing the intake side bearing portion 12 of the cylinder head 10, and the intake side camshaft 40 is rotatably supported between the intake side bearing portion 52 and the intake side bearing portion 12. (Held).

  1 and 2 is formed in the left part of the upper surface of the cam cap 50 (right side of the intake side bearing part 52 in the left-right direction). The intake-side recess 54 is formed so as to be recessed by a predetermined depth below the periphery thereof, and so that the upper side, the front side, and the rear side are opened.

  The intake side through hole 56 shown in FIG. 1 is a bolt hole into which a bolt 180 described later is inserted in order to fix the cam cap 50 to the cylinder head 10. The intake side through hole 56 is formed so as to penetrate from the right part of the bottom surface of the intake side recess 54 to the lower surface of the cam cap 50. Thus, the intake side recess 54 is formed around the upper end of the intake side through hole 56. The diameter of the suction side through hole 56 is formed larger than the diameter of the shaft portion of the bolt 180. Accordingly, when the shaft portion of the bolt 180 is inserted into the intake side through hole 56, a gap is formed between the intake side through hole 56 and the bolt 180.

  The intake-side communication oil passage 58 shown in FIG. 1 is an oil passage that communicates the intake-side bearing portion 52 and the left-side bearing portion oil passage 19 (not shown) with the intake-side through hole 56. The intake-side communication oil passage 58 is formed at a substantially central portion in the front and rear of the lower surface of the cam cap 50. One end of the intake side communication oil passage 58 is communicated with the intake side bearing portion 52 and the left bearing portion oil passage 19 (not shown). The other end of the intake side communication oil passage 58 is communicated with the intake side through hole 56.

  The exhaust-side bearing portion 60 shown in FIGS. 1 and 3 supports the exhaust-side camshaft 42 so as to be rotatable from above. The exhaust-side bearing portion 60 is formed on the right portion of the cam cap 50 so as to be a semicircular recess whose bottom is opened in a front view. The exhaust side bearing portion 60 is formed at a position facing the exhaust side bearing portion 14 of the cylinder head 10, and the exhaust side camshaft 42 is rotatably supported between the exhaust side bearing portion 60 and the exhaust side bearing portion 14. (Held).

  The exhaust-side recess 62 shown in FIGS. 1 to 3 is formed in the right part of the upper surface of the cam cap 50 (right side of the exhaust-side bearing part 60 in the left-right direction). The exhaust-side recess 62 is formed so as to be recessed by a predetermined depth below its periphery, and open upward, forward and rearward.

  The exhaust side through hole 64 shown in FIGS. 1 and 3 is a bolt hole into which a bolt 180 described later is inserted in order to fix the cam cap 50 to the cylinder head 10. The exhaust side through hole 64 is formed so as to penetrate from the left part of the bottom surface of the exhaust side recess 62 to the lower surface of the cam cap 50. Thus, the exhaust side recess 62 is formed around the upper end of the exhaust side through hole 64. A diameter of the exhaust side through hole 64 is formed larger than a diameter of a shaft portion of a bolt 180 described later. Thus, when the shaft portion of the bolt 180 is inserted into the exhaust side through hole 64, a gap is formed between the exhaust side through hole 64 and the bolt 180.

  The exhaust side communication oil passage 66 shown in FIGS. 1 and 3 is an oil passage that communicates the exhaust side bearing portion 60 and the right bearing portion oil passage 19 with the exhaust side through hole 64. The exhaust-side communication oil passage 66 is formed at a substantially central portion in the front and rear of the lower surface of the cam cap 50. One end of the exhaust side communication oil passage 66 communicates with the exhaust side bearing portion 60 and the right bearing portion oil passage 19. The other end of the exhaust side communication oil passage 66 communicates with the exhaust side through hole 64.

  In the present embodiment, the cylinder head 10 and the cam cap 50 configured as described above constitute a cam housing that rotatably supports the intake side camshaft 40 and the exhaust side camshaft 42 of the valve mechanism 30.

  Below, the structure of the oil supply member 100 is demonstrated using FIGS. 1-7.

  The oil supply member 100 shown in FIGS. 1 to 7 includes a lubrication part of the valve operating mechanism 30 (in this embodiment, cams 40a, 40a,... Of the intake side camshaft 40 and cams 42a, 42a of the exhaust side camshaft 42). ..) for supplying lubricating oil to As will be described later, the oil supply member 100 is formed with an oil passage through which the lubricating oil flows. The oil supply member 100 is formed so as to cover four cylinders arranged in the front-rear direction. As shown in FIGS. 1 and 2, the oil supply member 100 is provided on each of the intake side and the exhaust side in order to supply lubricating oil to the intake side and exhaust side lubrication portions of the valve mechanism 30. Thus, the engine 1 is provided with the two oil supply members 100.

  The main difference between the configurations of the two oil supply members 100 is that their shapes are symmetrical. Therefore, in the following description, the oil supply member 100 that supplies lubricating oil to the lubrication part on the exhaust side of the valve operating mechanism 30 (the oil supply member 100 on the right side shown in FIG. 1) of the two oil supply members 100 unless otherwise specified. The configuration of the oil supply member 100 (the left-side oil supply member 100 shown in FIG. 1) for supplying the lubricating oil to the intake side lubricating portion of the valve mechanism 30 will be appropriately omitted.

  The oil supply member 100 includes an oil passage forming member 200 and a pressure loss applying member 300.

  The oil passage forming member 200 forms a main structure of the oil supply member 100. As will be described later, the oil passage forming member 200 is formed by bending a single plate-like member in half. The oil passage forming member 200 is formed with an oil passage through which lubricating oil flows, as will be described later.

  First, the configuration of the oil passage forming member 200 before being bent will be described with reference to FIG.

  As shown in FIG. 8, the oil passage forming member 200 before being bent is a single plate-like member. In the following, for convenience of explanation, the oil passage forming member 200 before being bent is simply referred to as “plate material 210”. The plate member 210 mainly includes an upper body part 220, a lower body part 230, and a connecting part 240.

  The upper body part 220 forms the upper part of the oil passage forming member 200. The upper body 220 is formed so as to be positioned above the oil passage forming member 200 by bending the plate member 210 (see FIG. 4 and the like). The upper main body 220 is formed in an elongated plate shape. The upper main body 220 is disposed with the plate surface directed in the vertical direction and the longitudinal direction directed in the front-rear direction. The upper main body 220 mainly includes an upper through hole 221, an upper root oil passage 222, an upper derivative oil passage 223, and an upper member accommodation chamber 224.

  The upper through hole 221 is a hole that penetrates the upper body 220 in the vertical direction. The upper through hole 221 is formed in the right part of the upper main body 220. The upper through-hole 221 is formed in a circular shape in plan view. Three upper through holes 221 are formed in the upper main body 220. The three upper through holes 221 are arranged at substantially equal intervals in the front-rear direction.

  The upper root oil passage 222 is an oil passage formed from the vicinity of the front end of the upper body 220 to the vicinity of the rear end. The upper trunk oil passage 222 is formed by denting the upper surface of the upper main body 220 downward. The upper root oil passage 222 is formed to extend linearly in the front-rear direction at a position spaced leftward from the left end of the upper through-hole 221 by a predetermined distance. When the plate member 210 is bent, the upper root oil passage 222 extends from the vicinity of the position corresponding to the frontmost discharge port 235 described later in plan view to the vicinity of the position corresponding to the rearmost discharge port 235. Formed.

  The upper derived oil passage 223 is formed by branching from the upper root oil passage 222. The upper derived oil passage 223 is formed by denting the upper surface of the upper main body 220 downward. Four upper derived oil passages 223 are formed in the upper main body 220. The four upper derived oil passages 223 are arranged at substantially equal intervals in the front-rear direction.

  The foremost upper derived oil passage 223 communicates with the front end of the upper root oil passage 222 and is formed to extend leftward from the front end of the upper root oil passage 222. The left end of the foremost upper derived oil passage 223 is formed to extend to a position corresponding to the foremost discharge port 235 in plan view when the plate member 210 is bent.

  The second upper derived oil passage 223 from the front side is formed to communicate with the midway portion in the front-rear direction of the upper root oil passage 222. The second upper derived oil passage 223 from the front side is formed so as to extend leftward from the front-rear direction midway portion of the upper root oil passage 222 and bend at a right angle forward. The front end of the second upper derived oil passage 223 from the front side is formed so as to extend from the front side to a position corresponding to the second discharge port 235 in plan view when the plate member 210 is bent.

  The second upper derived oil passage 223 from the rear side (third from the front side) communicates with the middle part in the front-rear direction of the upper trunk oil passage 222 behind the second upper derived oil passage 223 from the front side, and It is formed so as to extend to the left from the midway part. The second upper derived oil passage 223 from the rear side is vertically connected to the upper trunk oil passage 222. The left end of the second upper derived oil passage 223 from the rear side is formed to extend from the rear side to a position corresponding to the second discharge port 235 in plan view when the plate member 210 is bent.

  The rearmost upper derived oil passage 223 communicates with the rear end of the upper root oil passage 222 and is formed to extend rearward from the rear end of the upper root oil passage 222. The rearmost upper derived oil passage 223 is connected to the upper trunk oil passage 222 so as to form an obtuse angle. The left end (rear end) of the rearmost upper derived oil passage 223 is formed so as to extend to a position corresponding to the rearmost discharge port 235 in plan view when the plate member 210 is bent.

  The upper member accommodating chamber 224 is a portion that accommodates an upper portion of a pressure loss applying member 300 described later. The upper member housing chamber 224 is formed by denting the upper surface of the upper main body 220 downward. The upper member accommodation chamber 224 is formed in the middle portion of the upper root oil passage 222, and is formed such that the upper root oil passage 222 extends in the left-right direction. The upper member accommodation chamber 224 is formed in a substantially rectangular shape in plan view. The depth of the upper member accommodation chamber 224 is the same as that of the upper root oil passage 222. By forming the upper member housing chamber 224 in this way, the upper member housing chamber 224 has a substantially rectangular parallelepiped space that is open upward.

  The upper member accommodation chamber 224 is formed one by one (two in total) before and after the front-side upper through-hole 221 in the middle of the upper trunk oil passage 222. The front upper member housing chamber 224 is formed between the connecting portion between the upper root oil passage 222 and the front-most upper derivative oil passage 223 and the front-most upper through-hole 221 in the front-rear direction. The rear upper member accommodation chamber 224 is formed between the connection portion between the upper trunk oil passage 222 and the second upper derived oil passage 223 from the front side, and the foremost upper through hole 221 in the front-rear direction. The

  The lower main body 230 forms the lower part of the oil passage forming member 200. Specifically, the lower body 230 is formed to be positioned below the oil passage forming member 200 by bending the plate member 210 (see FIG. 4 and the like). The lower main body 230 is formed in an elongated plate shape. The lower main body 230 is disposed with the plate surface directed in the vertical direction and the longitudinal direction directed in the front-rear direction. The lower main body 230 mainly includes a lower through-hole 231, a lower root oil passage 232, a lower derivative oil passage 233, a notch 234, a discharge port 235, and a lower member accommodation chamber 236.

  The lower through-hole 231 is a hole that penetrates the lower main body 230 in the vertical direction. The lower through hole 231 is formed in the left part of the lower main body 230. The lower through-hole 231 is formed in a circular shape in plan view. Three lower through holes 231 are formed in the lower main body 230. The three lower through holes 231 are arranged at substantially equal intervals in the front-rear direction. The lower through-hole 231 is formed at a position overlapping the upper through-hole 221 in plan view when the plate member 210 is bent. The lower through hole 231 is formed to have the same diameter as the upper through hole 221.

  The lower trunk oil passage 232 is an oil passage formed from the vicinity of the front end of the lower body 230 to the vicinity of the rear end. The lower trunk oil passage 232 is formed by denting the upper surface of the lower main body 230 downward. The lower root oil passage 232 is formed at a position overlapping the upper root oil passage 222 in plan view when the plate member 210 is bent. The lower trunk oil passage 232 is formed to extend linearly from the vicinity of the frontmost discharge port 235 in the plan view to the vicinity of the rearmost discharge port 235. However, the lower trunk oil passage 232 is formed so as not to be positioned at the right side portion of the front-side lower through hole 231.

  The lower derived oil passage 233 is formed by branching from the lower trunk oil passage 232. The lower derivative oil passage 233 is formed by denting the upper surface of the lower main body 230 downward. Four lower derived oil passages 233 are formed in the lower main body 230. The four lower derived oil passages 233 are arranged at substantially equal intervals in the front-rear direction. The lower derived oil passage 233 is formed symmetrically with the upper derived oil passage 223. The lower derived oil passage 233 is formed at a position overlapping the upper derived oil passage 223 in plan view when the plate member 210 is bent.

  The notch 234 is formed so that the right end of the foremost lower through-hole 231 is notched by a predetermined length toward the right. The right end of the notch 234 is formed so as to extend to a position corresponding to the upper root oil passage 222 (a portion located on the left side of the foremost upper through hole 221) when the plate member 210 is bent.

  The discharge port 235 is a port for discharging the lubricating oil supplied to the oil supply member 100 (oil passage forming member 200) from the oil supply member 100. The discharge port 235 is formed so as to penetrate the lower main body 230 in the vertical direction. The discharge port 235 is formed in a circular shape in plan view. The discharge ports 235 are respectively formed at the end portions of the four lower derived oil passages 233 in plan view. The discharge port 235 is formed on the bottom surface of the lower derivative oil passage 233.

  The lower member accommodating chamber 236 is a portion that accommodates a lower portion of a pressure loss applying member 300 described later. The lower member housing chamber 236 is formed by denting the upper surface of the lower main body 230 downward. The lower member housing chamber 236 is formed symmetrically with the upper member housing chamber 224. The lower member accommodation chamber 236 is formed so as to have a substantially rectangular parallelepiped space that is open upward, like the upper member accommodation chamber 224.

  The lower member accommodation chamber 236 is formed at a position overlapping the upper member accommodation chamber 224 in plan view when the plate member 210 is bent. The lower member housing chamber 236 is formed one by one (two in total) before and after the front-side lower through hole 231 in the middle of the lower trunk oil passage 232.

  The connection part 240 is a part that connects the upper body part 220 and the lower body part 230. The connecting part 240 connects a part of the right end part of the upper body part 220 and a part of the left end part of the lower body part 230 at four points. The connection part 240 is formed integrally with the upper body part 220 and the lower body part 230.

  The plate member 210 configured in this manner is bent in half, whereby the oil passage forming member 200 is formed (see FIG. 4 and the like).

  Next, the pressure loss applying member 300 will be described with reference to FIGS. 5 and 6.

  The pressure loss imparting member 300 imparts pressure loss to the lubricating oil flowing through the oil passage formed in the oil passage forming member 200. The pressure loss applying member 300 is formed by bending a substantially rectangular plate. A plurality of bent portions 300 a are alternately formed at the left end portion and the right end portion of the pressure loss applying member 300. Accordingly, the pressure loss applying member 300 is formed to be bent in a zigzag shape in a plan view. The pressure loss applying member 300 is formed so as to face rightward at both the front and rear ends.

  The pressure loss applying member 300 is formed such that the total length in the front-rear direction and the left-right direction is slightly smaller than the width in the front-rear direction and the left-right direction of the upper member storage chamber 224 and the lower member storage chamber 236 (see FIG. 6). . The pressure loss applying member 300 is formed such that the total length (height) in the vertical direction is substantially the same as the sum of the vertical depth of the upper member storage chamber 224 and the vertical depth of the lower member storage chamber 236. Is done.

  Below, the manufacturing method of the oil supply member 100 and the structure of the oil supply member 100 manufactured by the said manufacturing method are demonstrated using FIGS. 4-8.

  The plate material 210 having the above-described configuration is formed by punching out a single plate material by press working so that its outer shape, through holes, and the like are formed. Then, the plate member 210 is plastically deformed by the next press working to form an upper root oil passage 222, an upper member storage chamber 224, a lower root oil passage 232, a lower member storage chamber 236, and the like (see FIG. 8). ).

  Next, the pressure loss applying member 300 is disposed in the lower member housing chamber 236 of the plate member 210. The pressure loss applying member 300 is disposed with the bent portion 300a facing the left-right direction and the front and rear ends facing the right. Then, the plate member 210 is bent in half so that the upper body portion 220 overlaps the lower body portion 230 with the connecting portion 240 as the center. And the plate | plate material 210 is suitably crimped and welded by press work in the bent state. Thus, the plate member 210 is held in a state where the upper main body 220 and the lower main body 230 are in contact with each other, and is manufactured as the oil passage forming member 200 (see FIG. 4). Further, the pressure loss applying member 300 is held inside the oil passage forming member 200 (between the upper main body 220 and the lower main body 230).

  Thus, when the plate member 210 is bent and the oil supply member 100 is manufactured, as shown in FIG. 7A, the open side of the upper root oil passage 222 and the open side of the lower root oil passage 232 are separated. It arrange | positions so that it may mutually oppose and it may overlap with planar view. In this way, the root oil passage 260 is formed by the space defined by the upper root oil passage 222 and the lower root oil passage 232.

  When the plate member 210 is bent and the oil supply member 100 is manufactured, as shown in FIG. 7B, the side from which the upper derivative oil passage 223 is opened and the side from which the lower derivative oil passage 233 is opened are divided. It arrange | positions so that it may mutually oppose and it may overlap with planar view. Thus, the derived oil passage 270 is formed by the space defined by the upper derived oil passage 223 and the lower derived oil passage 233.

  When the plate member 210 is bent and the oil supply member 100 is manufactured, as shown in FIG. 7C, the foremost upper through hole 221 and the foremost lower through hole 231 overlap each other in plan view. By being arranged, the fuel filler opening 250 is formed. The oil supply port 250 is formed so as to penetrate the oil passage forming member 200 in the vertical direction. The oil filler port 250 is communicated with the trunk oil passage 260 through the notch 234.

  Further, when the plate member 210 is bent and the oil supply member 100 is manufactured, as shown in FIG. 7D, the opened side of the upper member accommodation chamber 224 and the opened side of the lower member accommodation chamber 236 are divided. It arrange | positions so that it may mutually oppose and it may overlap with planar view. As described above, the member accommodating chamber 280 is formed by the space defined by the upper member accommodating chamber 224 and the lower member accommodating chamber 236.

  As shown in FIG. 6, the pressure loss applying member 300 is accommodated in the member accommodating chamber 280. At this time, a slight gap is generated between the pressure loss applying member 300 and the member accommodating chamber 280 in the front-rear direction and the left-right direction. On the other hand, there is almost no gap between the pressure loss applying member 300 and the member accommodating chamber 280 in the vertical direction. Thus, by accommodating the pressure loss imparting member 300 in the member accommodating chamber 280, an oil passage (labyrinth oil passage) having a labyrinth structure is formed between the pressure loss imparting member 300 and the side wall of the member accommodating chamber 280. It is formed.

  As shown in FIG. 1 to FIG. 3, the oil supply member 100 configured in this manner is such that the plate surface of the lower main body portion 230 and the bottom surface of the exhaust-side concave portion 62 are in contact with each other with the longitudinal direction facing the front-rear direction. Placed in. The oil supply member 100 is disposed at a position where the upper through hole 221 and the lower through hole 231 (including the oil supply port 250) overlap with the exhaust side through hole 64 of the cam cap 50 in a plan view. A bolt 180 is inserted into the upper through hole 221 and the lower through hole 231, and the bolt 180 is engaged with a female screw hole (not shown) formed in the cylinder head 10. Fixed to. The oil supply member 100 is arranged in this way, so that the opening of the discharge port 235 is directed toward the cam 42a.

  Hereinafter, the lubricating oil supplied to the cams 42a, 42a,... (The lubricating portion of the valve operating mechanism 30) of the exhaust camshaft 42 in the lubricating oil supply mechanism of the engine 1 will be described with reference to FIGS. A supply mode will be described.

  The lubricating oil flowing through the oil gallery 16 is supplied to the exhaust-side bearing portion 14 via the cam journal oil passage 18. The lubricating oil supplied to the exhaust side bearing portion 14 is also supplied to the exhaust side bearing portion 60 as the exhaust side camshaft 42 rotates, and the exhaust side camshaft 42, the exhaust side bearing portion 14 and the exhaust side bearing portion 60 are supplied. Lubricate the sliding surface.

  The lubricating oil supplied from the cam journal oil passage 18 is supplied to the exhaust-side through hole 64 via the bearing portion oil passage 19 and the exhaust-side communication oil passage 66. As shown in FIG. 3, the bolt 180 is inserted into the exhaust side through hole 64, but since there is a gap between the exhaust side through hole 64 and the bolt 180, the lubricating oil passes through the exhaust side through hole 64. The inside of the hole 64 can be circulated. The lubricating oil supplied to the exhaust side through hole 64 flows upward in the exhaust side through hole 64 and is supplied to the oil supply member 100.

  Lubricating oil supplied to the oil filler 250 (the foremost upper through hole 221 and the lower through hole 231) is guided to the root oil passage 260 through the notch 234. The lubricating oil guided to the root oil passage 260 is guided to the front and rear of the oil supply port 250 along the root oil passage 260.

  The lubricating oil guided to the front side of the oil supply port 250 circulates further forward along the root oil passage 260 and is guided to the front member housing chamber 280. The lubricating oil flows through a labyrinth oil passage formed between the pressure loss applying member 300 and the member accommodating chamber 280 (see FIG. 6). The lubricating oil that has flowed through the labyrinth oil passage is discharged from the member storage chamber 280 and guided to the foremost derived oil passage 270. The lubricating oil flows along the derived oil passage 270 and is discharged downward from the frontmost discharge port 235. Thereby, lubricating oil is supplied to the foremost cam 42a.

  On the other hand, the lubricating oil guided to the rear of the oil filler 250 flows further rearward along the trunk oil passage 260 and is guided to the rear member housing chamber 280. The lubricating oil flows through a labyrinth oil passage formed between the pressure loss applying member 300 and the member accommodating chamber 280 (see FIG. 6). The lubricating oil that has circulated through the labyrinth oil passage is discharged from the member storage chamber 280. The lubricating oil circulates further along the root oil passage 260 and branches to the second derived oil passage 270 and the root oil passage 260 from the front side.

  The lubricating oil guided to the second derived oil passage 270 from the front side flows along the derived oil passage 270 and is discharged downward from the second discharge port 235 from the front side. As a result, the lubricating oil is supplied to the second cam 42a from the front side.

  The lubricating oil flowing further rearward along the root oil passage 260 is guided to the second derived oil passage 270 and the rearmost derived oil passage 270 from the rear side. The lubricating oil flows along the second derived oil passage 270 and the rearmost derived oil passage 270 from the rear side, and downward from the second discharge port 235 and the rearmost discharge port 235, respectively. It is discharged toward. Thus, the lubricating oil is supplied to the second cam 42a from the rear side and the rearmost cam 42a.

  As described above, the lubricating oil supplied from the oil supply port 250 always flows through the labyrinth oil passage formed between the pressure loss applying member 300 and the member storage chamber 280 and then discharged from the discharge port 235. The lubricating oil is given a pressure loss when it flows through the labyrinth oil passage. This pressure loss makes it difficult for the lubricating oil to flow to the derived oil passage 270 and the discharge port 235. Therefore, the amount of lubricating oil discharged from the discharge port 235 can be limited. Further, even if the lubricating oil is not continuously supplied to the oil supplying member 100 intermittently and the lubricating oil is continuously supplied to the oil supplying member 100 as in this embodiment, the valve operating mechanism It is possible to prevent the lubricating oil from being excessively supplied to the 30 lubricating portions.

  Further, the pressure loss applying member 300 is accommodated in the member accommodating chamber 280. Therefore, the movement of the pressure loss applying member 300 is restricted within the range of the member accommodating chamber 280. Therefore, the pressure loss applying member 300 can apply pressure loss to the lubricating oil at a predetermined position.

  Further, the pressure loss applying member 300 is disposed not in the derived oil passage 270 but in the root oil passage 260. The rear pressure loss applying member 300 is formed on the upstream side of the three derived oil passages 270. Therefore, even if the pressure loss applying member 300 is not provided in each of the three derived oil passages 270, the rear pressure loss applying member 300 prevents the lubricant from being excessively discharged from the three discharge ports 235. be able to.

  Further, the root oil passage 260 is divided into three portions P1, P2, and P3 by a connecting portion J with the derived oil passage 270. Of the three portions, the pressure loss applying member 300 is provided in the foremost portion P1. The lubricating oil supplied through the oil filler opening 250 is guided to the portion P1 by the notch 234. Therefore, the lubricating oil supplied through the oil supply port 250 first circulates in the labyrinth oil passage formed between the pressure loss applying member 300 and the member accommodating chamber 280. Therefore, by providing the pressure loss applying member 300 in the portion P1 (before and after the oil supply port 250), it is possible to prevent the lubricating oil from being excessively discharged from all the discharge ports 235.

  Further, the second to fourth derived oil passages 270 from the front side are formed such that the resistance is smaller as the position is located on the downstream side. Specifically, the second derived oil passage 270 from the front side is formed to be bent at a right angle. The third derived oil passage 270 from the front side (third from the rear side) is connected vertically to the trunk oil passage 260. The fourth (most rearmost) derived oil passage 270 from the front has an obtuse angle with respect to the root oil passage 260 (that is, the lubricating oil flowing through the root oil passage 260 is the third derivative oil passage from the front side. Connected so that it flows at a gentler angle than 270). Thereby, the difference of the discharge amount of the lubricating oil by the difference in the length of a flow path can be reduced.

  Further, in the oil supply member 100 according to the present embodiment, the pressure loss imparting member 300 is a separate member from the oil passage forming member 200. Thereby, since it is not necessary to form a labyrinth oil passage in the root oil passage 260 itself, there is an advantage that it is not necessary to form a complicated shape with a press.

  In addition, if an oil passage that is bent is to be formed in the oil passage forming member 200 with a press, the interval between the bent oil passages is too narrow (the upper body 220 and the lower body 230 between the oil passages). If the width of the contact portion is too small), the sealing performance of the oil passage is lowered. For this reason, the lubricating oil may leak from the oil passage to the outside of the oil passage forming member 200. In order to prevent the lubricating oil from leaking to the outside of the oil passage forming member 200, it is necessary to ensure a sufficient interval between the oil passages, which increases the overall size of the oil passage forming member 200.

  On the other hand, in this embodiment, the pressure loss applying member 300 bent in a zigzag shape is accommodated in the member accommodating chamber 280 formed in the oil passage forming member 200. Thereby, the labyrinth oil passage can be formed within the space formed by the member accommodating chamber 280. This is advantageous in that it is not necessary to increase the overall size of the oil passage forming member 200 in consideration of sealing performance. In the oil supply member 100 of this embodiment, pressure loss can be imparted to the lubricating oil in a smaller space while reliably sealing the oil passage.

As described above, the oil supply member 100 according to an embodiment of the present invention supplies the lubricating oil to the lubricating portion of the valve operating mechanism 30 that opens and closes the intake valve 32 and the exhaust valve 34 (intake and exhaust valve) of the engine 1. The oil supply member 100 is an oil supply port 250 to which lubricating oil is supplied, a discharge port 235 that discharges the lubricating oil to the lubricating portion, and guides the lubricating oil from the oil supply port 250 to the discharge port 235. An oil passage, and a pressure loss applying member 300 that is disposed in the middle of the oil passage and applies pressure loss to the lubricating oil.
By comprising in this way, it can prevent that lubricating oil is supplied excessively to the lubrication part of the valve operating mechanism 30. FIG.

In addition, a member accommodating chamber 280 for accommodating the pressure loss applying member 300 is formed in the middle of the oil passage.
By comprising in this way, a pressure loss can be provided to lubricating oil in a predetermined position.

The pressure loss applying member 300 forms a labyrinth structure.
By configuring in this way, the pressure loss applied to the lubricating oil can be further increased, and as a result, the lubricating oil can be prevented from being excessively supplied to the lubricating portion of the valve operating mechanism 30.

Also, a plurality of the discharge ports 235 are formed, and the oil passage includes a basic oil passage 260 that guides the lubricating oil supplied through the oil supply port 250 to the vicinity of the plurality of discharge ports 235, and the lubricating oil. A plurality of derived oil passages 270 that respectively guide the oil from the root oil passage 260 to the plurality of discharge ports 235, and the pressure loss applying member 300 of the plurality of derived oil passages 270 in the root oil passage 260. Of these, two or more of the derived oil passages 270 are disposed on the upstream side.
With this configuration, it is possible to prevent excessive supply of lubricating oil from the two or more discharge ports 235 to the lubricating portion of the valve operating mechanism 30 with one pressure loss applying member 300.

In addition, the pressure loss applying member 300 is disposed only in one portion of the plurality of portions partitioned by the connection portion J with the derivative oil passage 270 in the root oil passage 260, and is connected via the oil supply port 250. The supplied lubricating oil is first guided to the one part.
With this configuration, it is possible to prevent excessive supply of lubricating oil from the plurality of discharge ports 235 to the lubricating portion of the valve operating mechanism 30 with one pressure loss applying member 300.

Moreover, the lubricating oil supply mechanism of the engine 1 which concerns on this invention comprises the oil supply member 100 as described in any one of Claim 1-5.
By comprising in this way, it can prevent that lubricating oil is supplied excessively to the lubrication part of the valve operating mechanism 30. FIG.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described configuration, and various modifications can be made within the scope of the invention described in the claims.

  For example, the oil supply member 100 according to the present embodiment is applied to a DOHC gasoline engine having an in-line four-cylinder 8-valve engine, but the type of engine to which the oil supply member 100 is applied is not limited. When the oil supply member 100 is applied to, for example, an in-line 4-cylinder 16-valve engine, two derived oil passages 270 are formed for each cylinder, and a discharge port 235 is formed in each of the two derived oil passages 270. do it. Alternatively, the derived oil passage 270 may be bifurcated and a discharge port 235 may be formed at each branch destination.

  Moreover, in this embodiment, although the pressure loss provision member 300 shall be arrange | positioned at the upper and lower sides of the oil filler opening 250 in the root oil path 260, the position of the pressure loss provision member 300 is not limited to this. Absent. For example, the pressure loss imparting member 300 may be disposed so as to straddle the connection portion (the portion where the oil passage branches in the front-rear direction) between the notch 234 and the root oil passage 260. Alternatively, each of the derived oil passages 270 may be disposed.

  Further, in the present embodiment, the pressure loss imparting member 300 is formed in the foremost portion P1 of the three portions P1, P2, and P3 that are partitioned by the connecting portion J with the derived oil passage 270 in the root oil passage 260. However, it may be formed at P2 or P3.

  Further, in this embodiment, the pressure loss applying member 300 is a plate-like member bent in a zigzag shape, but the aspect of the pressure loss applying member 300 is not limited to this, and the pressure loss is applied to the lubricating oil. What is necessary is just to be able to provide. Hereinafter, another aspect of the pressure loss applying member 300 will be described.

  Below, the pressure loss provision member 400 which concerns on 2nd embodiment of this invention is demonstrated using FIG.10 and FIG.11.

  The pressure loss imparting member 400 is accommodated in the member accommodating chamber 280 and imparts pressure loss to the lubricating oil, similarly to the pressure loss imparting member 300 according to the first embodiment. The pressure loss applying member 400 includes a first plate member 410, a second plate member 420, a third plate member 430, a fourth plate member 440, and a fifth plate member 450.

  The first plate member 410 is a part that constitutes the foremost part of the pressure loss applying member 400. The first plate 410 is formed in a substantially rectangular plate shape with the plate surface in the front-rear direction and the longitudinal direction in the left-right direction. A through hole 411 is formed in the first plate member 410. The through hole 411 is formed in a circular shape when viewed from the front, and penetrates the first plate member 410 in the front-rear direction. The through hole 411 is formed in the right part of the first plate member 410.

  The second plate member 420 is a part constituting the second part from the front of the pressure loss applying member 400. The second plate member 420 is formed in a substantially rectangular plate shape with the plate surface in the front-rear direction and the longitudinal direction in the left-right direction. A through long hole 421 is formed in the second plate member 420. The through long hole 421 is formed in the shape of a long hole when viewed from the front with the longitudinal direction facing the left-right direction, and penetrates the second plate member 420 in the front-rear direction.

  The third plate member 430 is a portion constituting the third portion (center portion) from the front of the pressure loss applying member 400. The third plate member 430 is formed in a substantially rectangular plate shape with the plate surface in the front-rear direction and the longitudinal direction in the left-right direction. A through hole 431 is formed in the third plate member 430. The through hole 431 is formed in a circular shape when viewed from the front, and penetrates the third plate member 430 in the front-rear direction. The through hole 431 is formed in the left part of the third plate member 430.

  The fourth plate member 440 is a portion constituting the fourth portion from the front of the pressure loss applying member 400. The fourth plate member 440 is formed in a substantially rectangular plate shape with the plate surface in the front-rear direction and the longitudinal direction in the left-right direction. A through long hole 441 is formed in the fourth plate member 440. The through long hole 441 is formed in the shape of a long hole when viewed from the front with the longitudinal direction oriented in the left-right direction, and penetrates the fourth plate member 440 in the front-rear direction.

  The fifth plate member 450 is a part that constitutes the rearmost part of the pressure loss applying member 400. The fifth plate member 450 is formed in a substantially rectangular plate shape with the plate surface in the front-rear direction and the longitudinal direction in the left-right direction. A through hole 451 is formed in the fifth plate member 450. The through hole 451 is formed in a circular shape when viewed from the front, and penetrates the fifth plate member 450 in the front-rear direction. The through hole 451 is formed in the right part of the fifth plate member 450.

  The pressure loss applying member 400 is configured by superimposing the first plate member 410, the second plate member 420, the third plate member 430, the fourth plate member 440, and the fifth plate member 450 thus configured. In addition, the through hole 411, the through long hole 421, the through hole 431, the through long hole 441, and the through hole 451 form an oil passage (labyrinth oil passage) that is bent in a zigzag shape and has a labyrinth structure (see FIG. 11). ).

As described above, the pressure loss imparting member 400 according to the second embodiment of the present invention is formed by overlapping a plurality of plate members (members) having through holes, and is zigzag-shaped by the through holes of the plurality of plate members. In this way, an oil passage (labyrinth oil passage) having a labyrinth structure is formed.
With this configuration, the lubricating oil supplied from the oil supply port 250 via the root oil passage 260 is given a pressure loss by flowing through the labyrinth oil passage. Thereby, the flow volume of lubricating oil can be restrict | limited.

  Below, the pressure loss provision member 500 which concerns on 3rd embodiment of this invention is demonstrated using FIG.

  Similar to the pressure loss application member 300 according to the first embodiment, the pressure loss application member 500 is accommodated in the member accommodation chamber 280 and imparts pressure loss to the lubricating oil. The pressure loss applying member 500 is formed in a substantially rectangular parallelepiped shape. A bent oil passage 510 is formed in the pressure loss applying member 500.

  The bent oil passage 510 is a portion through which lubricating oil flows. The bent oil passage 510 is formed such that the upper surface of the pressure loss applying member 500 is recessed downward. The bent oil passage 510 is formed so as to penetrate the pressure loss applying member 500 in the front-rear direction. The bent oil passage 510 is formed in the middle in the left-right direction of the pressure loss applying member 500 so that the front, rear, and upper sides are opened. The bent oil passage 510 is formed in a zigzag shape by continuously arranging portions that are bent at substantially right angles in a plan view. Thereby, the bent oil passage 510 forms an oil passage (labyrinth oil passage) having a labyrinth structure.

As described above, the pressure loss imparting member 500 according to the third embodiment of the present invention has the bent oil passage 510 (labyrinth oil passage) that penetrates the pressure loss imparting member 500 and bends in a zigzag shape to have a labyrinth structure. Is formed.
With this configuration, the lubricating oil supplied from the oil supply port 250 via the root oil passage 260 flows through the bent oil passage 510, so that pressure loss is imparted. Thereby, the flow volume of lubricating oil can be restrict | limited.

  In the third embodiment, the bent oil passage 510 is formed so that the upper surface is recessed downward, but may be formed so that the lower surface is recessed upward.

  As described above, the pressure loss imparting member 400 according to the second embodiment and the pressure loss imparting member 500 according to the third embodiment have been described as other aspects of the pressure loss imparting member of the present invention. Is not limited to these. For example, the pressure loss applying member of the present invention may be a ball-shaped member or a sponge-shaped member.

DESCRIPTION OF SYMBOLS 1 Engine 30 Valve mechanism 32 Intake valve 34 Exhaust valve 50 Cam cap 100 Oil supply member 235 Discharge port 250 Oil supply port 260 Base oil passage 270 Derived oil passage 280 Member storage chamber 300, 400, 500 Pressure loss provision member

Claims (6)

An oil supply member that supplies lubricating oil to a lubricating portion of a valve operating mechanism that opens and closes an intake / exhaust valve of an engine,
An oil supply port to which lubricating oil is supplied;
A discharge port for discharging the lubricating oil to the lubricating portion;
An oil passage for guiding the lubricating oil from the oil supply port to the discharge port;
A pressure loss applying member that is disposed in the middle of the oil passage and applies pressure loss to the lubricating oil;
An oil supply member comprising: A member accommodating chamber for accommodating the pressure loss applying member is formed in the middle of the oil passage.
The oil supply member according to claim 1. The pressure loss applying member forms a labyrinth structure,
The oil supply member according to claim 1 or claim 2. A plurality of the discharge ports are formed,
The oil passage is
A trunk oil passage that guides the lubricating oil supplied through the oil supply port to the vicinity of the plurality of discharge ports;
A plurality of derived oil passages that respectively guide the lubricating oil from the root oil passage to the plurality of discharge ports;
The pressure loss imparting member is disposed on the upstream side of the two or more derived oil passages among the plurality of derived oil passages in the root oil passage.
The oil supply member as described in any one of Claim 1- Claim 3. The pressure loss imparting member is disposed only in one portion among a plurality of portions partitioned by a connection portion with the derivative oil passage in the root oil passage,
The lubricating oil supplied through the oil filler port is first guided to the one part.
The oil supply member according to claim 4. The oil supply member according to any one of claims 1 to 5 is provided.
Engine oil supply mechanism.

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