JPS597718A - Supply oil passage to hydraulic lash adjuster - Google Patents

Abstract

PURPOSE:To supply defoamed working oil to a hydraulic lash adjuster without causing any decrease of the pressure of the working oil, by arranging a defoaming chamber in a position lower than the hydraulic lash adjuster separately from an engine main unit. CONSTITUTION:Working oil is supplied through a defoaming chamber 64 to a hydraulic lash adjuster 14 of an engine. In the half way of a supply passage of the working oil, the defoaming chamber 64 is arranged in a position lower than the lash adjuster 14 separately from the main unit of the engine. In this way, the pressure of the working oil to the lash adjuster 14 is not reduced, and the defoaming chamber 64 is formed in a large size, permitting suffcient defoaming of the working oil. Further the lash adjuster can be prevented from improper operation and/or deterioration of durability due to a temperature rise of the working oil.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refueling passage for a lash adjuster used in a rocker arm support portion of a valve train of an internal combustion engine.

In a conventional overhead valve type valve train, the rocker arm is swingably supported by the cylinder head, providing clearance between the intake and exhaust valves and the rocker arm when the engine is in a closed state, and allowing the rocker arm to move freely when the engine is hot. This prevents the intake and exhaust valves from closing incorrectly, but for all the intake and exhaust valves of each cylinder, adjust the clearance to an appropriate value by turning the adjustment screw screwed onto the tip of the rocker arm. Because it has to be done, it takes time and effort to assemble and maintain it.
In addition, these clearances may differ due to changes over time, which may cause noise in the valve train.

A lash adjuster was used to save this time and effort and to create a quiet engine without noise.
If air bubbles are mixed in the hydraulic oil supplied to the lash adjuster, the air bubbles will be crushed by the action of the rocker arm, and the lash adjuster will not be held rigidly, resulting in improper opening of each valve, impact, etc. A decrease in output and generation of noise were unavoidable.

Furthermore, in order to defoam the air bubbles in the hydraulic fluid, it is necessary to increase the time during which the hydraulic fluid remains in the defoaming chamber and to lower the pressure within the defoaming chamber.

However, since the diameter of the hydraulic oil passage and the diameter of the throttle part of the lash adjuster are constant, as the speed of the engine increases, the oil pressure supplied from the hydraulic pump to the reservoir chamber in the lash adjuster will drop significantly. As shown by the curve in FIG. 1, the lower limit of the hydraulic pressure supplied in the hydraulic pressure supply path increases as the rotational speed increases. In addition, as the engine speeds up, the operating time of the pressing force acting on the rocker arm support portion of the lash adjuster is shortened, so the amount of hydraulic oil discharged from the lash adjuster is reduced.
As shown in curve 8 in FIG. 1, the upper limit of the supply a11 pressure in the hydraulic pressure supply path decreases as the rotational speed increases.

Since the hydraulic pressure of the hydraulic oil supplied to the lash adjuster is required to be within a permissible range, the pressure in the defoaming chamber inserted in the hydraulic oil passage to the lash adjuster must be adjusted to a large extent. It was not possible to achieve sufficient defoaming.

Moreover, since conventionally the degassing chamber No. 11 was installed in the cylinder head of the engine, it was not possible to increase the size of the degassing chamber and prolong the retention time of the hydraulic oil in the degassing chamber. It was difficult to sufficiently degas the hydraulic oil.

The present invention relates to an improvement of the oil supply passage for a hydraulic lash adjuster that overcomes these difficulties, and its purpose is to provide a hydraulic lash with sufficiently degassed hydraulic oil without significantly reducing the hydraulic oil pressure. The point is to provide a structure that can supply an adjuster G.

An embodiment of the present invention illustrated in the drawings will be described below.

1 is a four-wheel, four-cylinder gasoline engine for motorcycles; the cylinder head 2 of the engine 1 has two intake ports 3 and two exhaust ports 4 for each cylinder; An intake valve 5 and an exhaust valve 6 are fitted so as to be openable and closable so that the port 3.4 can be opened and closed.

Further, the intake/exhaust valve 5.6 includes the intake/exhaust port 3.4.
Compression coil springs 7 are attached to each of the coil springs rl in a direction that allows the rims to be closed at all times.

Furthermore, the cam 8 is biased toward one side above the intake and exhaust valve 5.6.
is pivotally supported, and the cam 8 connects the chain 1 to the crankshaft 9.
() and are connected via spulkerato 11,
The cam 8 is rotatably driven in synchronization with the rotation of the crankshaft 9. Furthermore, the cam 8 is located on the opposite side of the intake/exhaust valve 5.6 and substantially parallel to the same boat 5.6, with the cam 8 in between. - Ratunyu adjuster insertion tubes 13 are formed facing toward the L direction, and the insertion tubes 1
A hydraulic lash adjuster 14 is fitted into each of the parts 3 so as to be freely retractable.

Moreover, one end of the rocker arm AI2 is pivotally supported on the tip spherical bearing portion 17 of the plunger 16 in the lash adjuster 14, and the central upper surface of the rocker arm 12 contacts the cam 8. The other end can come into contact with the top end of the intake/exhaust valve 5.60.

However, as shown in FIG.
are the adjuster body 15 and the same adjuster body 15.
A plunger 16 is slidably fitted inside the adjuster body 16, a retainer cap 18 is fitted to the upper end of the adjuster body 15 to prevent the plunger 16 from protruding beyond a certain length, and a check ball case 19 is inserted. A plunger bringing force is applied to force the plunger 16 upward, and the check ball case 19 is applied so that the lower end valve seat 16a of the plunger 16 and the check ball 21 are brought into pressure contact.
and the check ball spring 22 with which the check ball 210 is inserted. Note that FIG. 5 shows a lash adjuster located near the closed end 24b of the horizontal oil supply passage 24, and when the supply passage 24'fr: is provided beyond the communication opening 23 in this way, the horizontal oil supply passage 24'fr: A small amount of dirt or metal powder interposed in the lash adjuster 24 is supplied only to the lash adjuster 14 located near the closed end 24b, thereby preventing malfunction or the like.

In addition, as shown in FIGS. 2 and 3, in the cylinder head 2, horizontal oil is directed in the width direction of the vehicle substantially parallel to the crankshaft 9. A supply path 24 is provided at the rear intake port 3 side and the front exhaust port 4 side, and an inclined oil supply path 25 is provided so as to be connected to the oil supply path 24 in the horizontal view. A lash adjuster oil supply passage 26 is formed which is connected to the center of the oil supply passage 25.

An air vent hole 27 is provided at the bottom of each lash adjuster insertion tube 13.
Between the upper ends [] 28 is a communication opening 23 between the lash adjuster insertion cylinder 13 and the horizontal oil supply path 24 (see Fig. 5).
G is adjusted so that it is located higher up.

Furthermore, one end 5a of the inclined oil supply path 25 is
The oil tube joints 32 at both ends of the lash adjuster oil tube 33 communicate with the oil communication passage 30 of the camshaft holder 29, and the oil tube joints 32 at both ends of the lash adjuster oil tube 33 can be freely fitted and removed through the O-ring 32a into the upper end opening 31 of the oil communication passage 30. It is designed to be tightly fitted.

Further, in the cylinder head 2, a cam journal 3 pivotally supports each cam 8 of the rear intake valve 5 and the front exhaust valve 6.
4 (see Fig. 3), an inclined oil supply passage 35, a horizontal oil supply passage 36, and an oil communication passage 37 are drilled in the cylinder head 2, and a central portion G of the oil communication passage 37 is provided. Cam journal oil supply port 38
is formed between the upper ends of the oil communication passage 37 [139,
Oil tube joints 40 at both ends of a cam journal oil tube 41 (see FIG. 7) are removably fitted in an oil-tight manner.

Next, the oil supply system that runs from the oil pump 43 (see FIG. 2) to the oil supply port 26 of the lash adjuster insertion cylinder 13 and the oil supply M port 3EH of the cam journal 34 will be described.

As shown in FIGS. 2 and 4, an oil pump 43 is disposed in an oil nozzle 42 at the bottom of the engine 1, and a sprocket 45 integrated with the rotor of the oil pump 43 is connected via a chain 46. The oil pump 43 is connected to a sprocket 47 of the crankshaft 9, and the oil pump 43 is rotated in proportion to the rotational speed of the engine 1.

Further, a wire mesh oil filter 48 is attached to the suction port 43a of the oil pump 43, and the discharge port 43b of the oil pump 43 is connected to the oil filter 51 via the discharge pipe 49 and the communication passage 5o. 48.51, it is filtered in two stages.

Further, the discharge passage 52 of the oil filter 51 is connected to the left end of a width direction oil passage 54 in the lower crankcase 53, and the right end of the oil passage 54 is connected to a main journal 56 that supports the right end of the crankshaft 9 via a communication passage 55. The inner end of an oil passage 58 oriented diagonally rearward and upward is connected to the main journal 56 in the upper crankcase 57 .

Furthermore, one end of the cam journal oil supply vibro 0 is detachably connected to the outer end of the oil passage 58 by an oil pipe joint 59 (see Fig. 6), and the other end of the oil supply vibro 0 is bifurcated. The branched vibro 1 is removably connected to the cam journal oil supply ``138'' through an oil pipe joint 62.

The defoaming device 64 is integrally mounted on the upper right side of the upper crankcase 57, and the defoaming device casing 65 of the defoaming device 64 (see FIGS. 8, 9 and 10)
(see figure), the upper degassing chamber 67 and the lower degassing chamber 6 are separated by a partition plate 66.
A lid member 69 is integrally fitted to the top end of the upper degassing chamber 67, an orifice 70 is provided in the lid member 69, and an oil jet nozzle 7 is provided at the 1ζ end of the orifice 70.
The nozzle 71 is oriented such that one end of the nozzle 1 is connected to the upper defoaming chamber 67, and the tip of the nozzle 71 is directed in the horizontal tangential direction of the upper degassing chamber 67.

The tip of the defoaming device oil supply vibro 3 branched from the middle of the cam journal oil supply pipe (a) (see FIG. 6) is connected to the orifice 70 of the defoaming device 64.
A part of the oil flowing through the cam journal oil supply vibro 0 is connected to the defoaming device oil supply vibro 3, the orifice 70 and the oil jet nozzle 71.
′? i: is ejected into the upper degassing chamber 67 through the nozzle 71G, and flows in a spiral direction around the vertical axis in the upper degassing chamber 67 through the nozzle 71G. The oil flows along the inner wall side of the defoaming device casing 65, and the oil mixed with air bubbles having a low specific gravity is collected at approximately the center of the defoaming device casing 65.

Further, a communication hole 72 is provided in the outer peripheral part of the partition plate 66,
A guide plate 74 is integrally attached to the lower surface of the partition plate 66 so that the lower part of the communication hole 72 opens in the same direction as the tip opening of the oil jet nozzle 71, and the upper degassing chamber 6
The oil that is present at the bottom of the hole 72 and the guide plate 7
4 and opening [173] into the lower degassing chamber 68 in the same direction as the oil flow direction of the upper degassing chamber 67, and has the same effect as the upper degassing chamber 67.

Furthermore, the lash adjuster oil supply pipe 75 penetrates the lid member 69 and the partition plate 66 and is integrally fitted therein so that the lower end of the lash adjuster oil supply pipe 75 opens at the bottom of the lower defoaming chamber 68. The upper end of the oil supply pipe 75 (see FIG. 6) is formed into a two-pronged branch pipe 76, and the branch pipe 76 is removably connected to the lash adjuster oil supply passage 26 through an oil pipe joint 77. There is.

Furthermore, the lower end of the upper vent oil discharge pipe 80 (see FIG. 8) is opened at the upper part of the upper degassing chamber 67.
The upper end of a vent oil discharge pipe 80 is integrally fitted into the vent oil passage 78 of the lid member 69 via an orifice 79, and the lower vent oil discharge pipe 80 is disposed so as to communicate the lower defoaming chamber 68 and the vent oil passage 78. A pipe 81 is provided, and an orifice 82 is interposed in the discharge pipe 81.

Therefore, the vent pipe 83 (see Fig. 6 and Fig. 8)
One end of the vent pipe 83 is connected to the open end of the vent oil passage 78, and the other end of the vent pipe 83 is connected to the oil supply path 86 of the alternator 85 through an oil pipe joint 84'fi.
(See FIG. 4), and the oil containing a lot of bubbles from the defoaming device 64 is removed from the vent oil discharge pipe 80.8.
1, the oil is supplied to an alternator oil supply path 86 via a vent oil passage 78, a vent vibe 83, and an oil pipe joint 84.

Further, the oil supply path 86 is connected to the shaft 87 of the alternator 85.
The hollow oil passage 88 is connected to the same hollow oil passage 88.
A branch passage 89 branches off in the radial direction from 8, and oil is supplied to the chain drive part 90 and one-way clutch 91 of the alternator 85, and is used to lubricate each bearing part and lubricate the alternator 85. cooling. When the oil flows back into the oil pan 42, it is sufficiently defoamed at atmospheric pressure.

Since the illustrated embodiment is configured as described above, when the engine 1 is set to the operating state, the oil pump 43
is rotated in proportion to the rotational speed O of the engine 1.

Then, the oil accumulated in the oil pan 42 is filtered by the oil filter 48 and then sucked into the oil pump 43, pressurized within the oil pump 43, and sent to the oil filter 51 via the discharge pipe 49 and the communication passage 50. The oil is further filtered by the same oil filter 51.

Further, the oil filtered by the oil filter 51 is sent to the main journal 56 via the discharge passage 52, the middle oil passage 54, and the communication passage 55, and the main journal 56 is lubricated with the oil.

Furthermore, the main journal 56'f: The oil that has passed flows through the oil passage 58 and joins the oil pipe.
Cam journal oil supply via 59 ft Vibro 0
A part of the oil in the vibro 0 reaches the cam journal oil supply port 38 via the two-pronged vibro 1 and the oil pipe joint 62.

Also, some of the oil that has reached the cam journal oil supply port 38 is transferred to the oil communication passage 37'? i: is sent to the intake side horizontal oil supply path 36, and is supplied to the intake side cam journal 34 via the inclined oil supply path 35, so that the intake side cam journal 34 is lubricated.

Furthermore, the remainder of the oil that has reached the cam journal oil supply port 38 flows upward in the oil communication passage 37, and passes through the upper end opening 39, the oil tube joint 40, and the cam journal oil tube 41 to the oil tube on the exhaust side. The joint 40 and the upper opening 39 are reached. The oil that has reached the upper end opening 39 on the exhaust side is supplied to the exhaust side cam journal 34 via the oil communication passage 37, the horizontal oil supply passage 36, and the inclined oil supply passage 35,
The exhaust side cam journal 34 is lubricated.

Furthermore, the cam journal oil tube 41 is curved in a U-shape so as to be adjacent to a group of intake and exhaust valves 5.6 that are divided into left and right halves by a cam chain chamber 92 formed at the center in the width direction of the engine 1. An oil injection port 93 is formed on the outer surface thereof toward the top of each intake/exhaust valve 5.6 and the rocker arm 12. -S/l/, t A part of the oil flowing through the oil tube 41 is jetted out from the oil injection port 93, and the oil is supplied to the sliding surfaces of the rocker arm 12, the intake/exhaust valve 5.6, and the cam 8. Ru.

Moreover, a part of the oil flowing in the cam journal oil supply vibro 0 flows into the defoaming device oil supply vibro 3 and is directed tangentially into the upper defoaming chamber 67 from the oil jet nozzle 71 via the orifice 70. It is squirted.

Then, the oil spouted into the upper degassing chamber 67 gradually descends while swirling in a spiral, and passes through the communication hole 72 to the guide plate 7.
4 into the lower degassing chamber 68 in the same tangential direction as the jet nozzle 71 .

While the oil flows spirally in the upper degassing chamber 67 and the lower degassing chamber 68 in this manner, the oil containing many air bubbles floats inside each degassing chamber 67, 68 and 2. The oil flows from the upper and lower vent oil discharge pipes 80.81 into the generator oil supply path 86 via the vent oil passage 78, the vent vibe 83, and the oil vibe joint 84. The oil in the supply path 86 is sent to the chain drive section 90 and the one-way clutch 91 via the hollow oil passage 88 and the branch passage 89 of the generator shaft 87.
And the one-way clutch 91 is lubricated.

On the other hand, the defoamed oil that flows spirally in the upper and lower degassing chambers 67 and 68 rises in the lash adjuster oil supply vibe 75 that is open at the bottom of the lower degassing chamber 68 and is divided into three prongs. Reaching the vibe 76, the same two-pronged vibe 76
The oil then flows into the inclined oil supply path 5 via the oil vibe joint 77o and the lash adjuster oil supply path 26.

A portion of the oil that has flowed into the inclined oil supply passage 5 descends and is supplied to the lash adjuster 14 in the intake side lash adjuster insertion cylinder 13 via the intake side horizontal oil supply passage. At the same time, the remainder of the oil that has flowed into the inclined oil supply path 5 rises to the camshaft holder 29.
oil communication connection, upper end opening 31, oil tube joint 32, lash adjuster oil tube 33,
Exhaust side oil tube joint 32X upper end opening 31
The oil is supplied to the lash adjuster 14 in the exhaust side lash adjuster insertion tube 13 through the oil communication path 301, the exhaust side inclined oil supply path 5, and the horizontal oil supply Wt.

In the above embodiment, the defoaming device 64'ft is installed in the upper crankcase 57 separately from the cylinder head 2 of the engine 1.
The casing 6 of the defoaming device 64 is located behind the
5 can be formed to a sufficient size, and the defoaming device 64
The oil can be defoamed for a long time without reducing the oil pressure of the oil supplied to the lash adjuster 14.

Moreover, inside the defoaming device 64, soil and lower defoaming chambers 67 and 68
When the air is removed in two stages, the oil jet nozzle 71 and the guide plate 74 simultaneously rotate the air in a spiral pattern, so the air removal time becomes longer by Q, ensuring sufficient air removal. becomes possible.

Furthermore, since the defoaming device 64 is placed away from the high-temperature cylinder head 2 and upper crankcase 57, it is possible to prevent the temperature of the oil supplied to the lash adjuster 14 from rising, thereby improving the durability of each part of the oil tappet.

Furthermore, there is no need to enlarge the cylinder head 2 to form a defoaming chamber, which reduces the amount of expensive cylinder head material used and reduces weight.

Furthermore, an external pipe ω connecting an oil passage 58 leading to the discharge side of the oil pump 43 and a lash adjuster oil supply passage 26 that passes through the lash adjuster 14;
Since the defoaming device 64 is inserted in the 63.75, the defoaming device 64 can be freely installed at the desired position, eliminating the need for unnecessary waste and hole machining, and reducing the cost of expensive cylinder heads. Combined with the savings in materials, it is possible to significantly reduce costs.

In addition, oil containing a large amount of bubbles is supplied from the defoaming device 64 through the vent pipe 83 from the upper and lower vent oil discharge pipes 80 and 81 to the chain drive part 90 of the alternator 85 and the one-way clutch 91. Therefore, the oil containing a large amount of bubbles can be effectively used for lubricating the engine 1.

In addition, the main journal 5 that pivotally supports the crankshaft 9
6 is supplied to the cam journal, the lash adjuster 14, and the lubricated parts 90 and 91 of the alternator 85, so there is no need to increase the amount of oil supplied to the oil pump 43, and the load on the pump 43 is reduced. It can be reduced.

In the present invention, in the supply passage to the hydraulic ratunyu adjuster that supplies hydraulic oil to the hydraulic lash adjuster used in the engine's valve mechanism through the degassing chamber, the hydraulic lash adjuster is located below the hydraulic lash adjuster of the engine. In order to arrange the degassing chamber separately from the engine main body, the above-mentioned 'fI1
The defoaming chamber can be enlarged without significantly lowering the pressure of the hydraulic oil to the one-pressure lash adjuster, and thereby the hydraulic oil can be sufficiently defoamed.

In addition, in the present invention, since the defoaming chamber does not need to be formed in the high-temperature and expensive cylinder head, it is possible to prevent the lash adjuster from malfunctioning or deteriorating its durability due to an increase in the temperature of the hydraulic oil. It is also possible to reduce G1 cost.

[Brief explanation of the drawing]

Fig. 1 is a characteristic diagram illustrating the range in which the hydraulic pressure to be supplied to the lash adjuster must be in response to changes in engine speed, and Fig. 2 is a characteristic diagram showing the range in which the hydraulic pressure to be supplied to the lash adjuster must be in response to changes in engine speed. FIG. 3 is a longitudinal sectional side view of a four-cycle four-cylinder gasoline engine for a motorcycle equipped with an embodiment of the refueling passage, FIG. 3 is a longitudinal sectional rear view thereof, and FIG. 5 is an enlarged longitudinal sectional view of the main part of FIG. 2, FIG. 6 is a view taken in the direction of the ■ arrow in FIG.
The figure is a perspective view of the oil tube of the same embodiment, FIG. 8 is a vertical cross-sectional side view of the defoaming device in the same embodiment, FIG. FIG. 1O is a longitudinal sectional front view cut in a direction perpendicular to the cross-sectional direction of FIG. 8. 1... Mouth cycle four-cylinder gasoline engine for motorcycles, 2... Cylinder head, 3... @ air port, 4
...exhaust boat, 5...intake valve, 6...exhaust valve,
7... Compression coil spring, 8... Cam, 9...
・Crankshaft, 10... Cheno, 1]... Sprocket, 12... Rocker arm, ]3... Ratsunyu adjuster insertion tube, 14... Lash adjuster, 15... Adjuster body, 16 ... Plunger, 17... Spherical tip bearing, 18... Retainer cap, 19... Check ball case, processing...
Plunger spring, 21... Check ball, 2
2... Check ball spring, 23... Communication opening, 24... Horizontal oil supply path, 24b... Closed end, 25... Inclined oil supply path, 26... Lash adjuster oil supply path, 27... Air vent hole, 28
...Top opening, 29...Camshaft boulder-13
0... Oil communication path, 31... Upper end opening, 32...
・Oil tube join), 32 a...0 ring, 33...Lash adjuster oil tube, 3
4... Cam journal, 35... Inclined oil supply path, 36... Horizontal oil supply path, 37... Oil communication path, 38... Cam journal oil supply port, 39...
・Top opening, 4°...Oil tube joint, 4
oa-1-o ring, 41... cam journal oil tube, 42... oil pan, 43... oil pump, 44... rotor, 45... sprocket, 4
6...cheno, 47...sprocket, 48...
Oil filter, 49...Discharge pipe, 50...Communication path, 51...Oil filter, 52...Discharge path,
53... Lower crankcase, 54... Width direction oil passage, 55 F:<i communication passage, 56... Main journal, 57... Annogu-crankcase, 58...
...Oil passage, 59...Oil pipe joint,
60...Cam journal oil supply pipe, 61...
- Three-pronged branch pipe, 62... Oil pipe joint, 63... Defoaming device oil supply pipe, 64... Defoaming device, 65... Defoaming device casing, 66... Partition plate, 67 ...Lower defoaming chamber, 68...Lower defoaming chamber,
69... Lid member, 70... Orifice, 71...
Oil jet nozzle, 72... Communication hole, 73... Opening, 74... Guide plate, 75... Lash adjuster oil supply pipe, 76... Two-pronged branch pipe, 77,
・, Oil pipe joint, 78... Vent oil passage, 79... Orifice, 80... Upper vent oil discharge pipe, 81... Lower vent oil discharge pipe, 82
... Orifice, 83... Vent pipe, 84...
Oil pipe joint, 85... Alternator, 86...
... Generator oil supply path, 87 ... AC generator shaft, 88 ... Hollow oil passage, 89 ... Branch passage,
90...Chain drive part, 91...One-way clutch, 92...Cam chain chamber, 93...Oil injection port. Agent: Patent attorney Nozomi Ehara (1 person) Figure 1 Procedural amendment August 23, 1980 Director of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 117325 2, Title of the invention Hydraulic lash adjuster Refueling passage to
The number of inventions increased by the amendment: None 7, Drawings to be amended: 8, Contents of the amendment As shown in the attached sheet, Figure 1 of the original drawings in the application will be replaced with the attached drawing. Procedural amendment dated October 5, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case, Patent Application No. 117325, filed in 1982, Title of the invention Oil supply passage to hydraulic lash azimuth master 3, Person making the amendment Relationship to the case Patent applicant 4, agent name (6784) Patent attorney Nozomi Ehara 1 person 5,
Date of amendment order Involuntary 6 Number of inventions increased by amendment None 7, Specification subject to amendment 8 Supplement 1') 6 In the description as attached (1) Page 4, line 12 and page 6 Correct 1'Intake boat 3' on line 19 to 'Intake boat 4'. (2) Correct "Exhaust bow) 4J" in line 13 of page 4 and car side line of page 6 to 1 exhaust boat 3. (3) Correct "intake valve 5 and exhaust valve 6" in lines 14 and 15 of page 4 to "intake valve 6 and exhaust valve 5." (4) "Rear intake valve 5 and front exhaust valve 6" on page 7, lines 16 and 17 are changed to [rear intake valve 6 and front exhaust valve 5. ”, and changed “3...Intake boat, 4...Exhaust boat,...6...Exhaust valve” in the first and second lines of page 21 to N. '3...exhaust boat, 4...U & air boat, 5...exhaust valve, 6...intake valve'' is corrected.

Claims (1)

[Claims] In the oil supply passage to the hydraulic lash adjuster, which supplies hydraulic oil P to the hydraulic lash adjuster used in the engine's valve mechanism through a defoaming chamber, the defoaming mechanism is located below the hydraulic lash adjuster of the engine. A refueling passage to a hydraulic lash adjuster characterized by having a chamber arranged separately from the engine body.