JPH10121930A - Oil pump mounting device for engine - Google Patents

Abstract

(57) [Summary] [Object] To improve the workability and maintainability of an oil pump in an oil pan of an engine equipped with an oil pan integrated with a bearing cap at the lower part of a cylinder block. Avoid restrictions. [Configuration] The oil pan main body 4 ₁ is fixed to the lower surface of the cylinder block 2, the bearing cap portion 4B ₁ ～4B
An oil pan chamber Co having an opening 24 at one end is formed between the oil pan ₅ and the bottom wall 20, and the oil pump Op is attached to the bottom wall 20 of the oil pan chamber Co through the opening 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump mounting device for forcibly supplying lubricating oil stored in an oil pan to each lubricated portion in an engine, mainly a vehicle engine.

[0002]

2. Description of the Related Art Conventionally, in an engine having an oil pan on the lower surface of a cylinder block, an oil pump for forcibly supplying lubricating oil stored in the oil pan to each lubricated portion of the engine is provided. The one attached to the bottom is already well known (for example,
No. 64609), and in the engine,
A well-known type in which a bearing cap integrated with an oil pan integrated with a bearing cap portion for supporting a crankshaft is integrally formed on a lower surface of a cylinder block is also well known (for example, see Japanese Patent Publication No. 59-50864). .

[0003]

By the way, in an engine equipped with such an oil pan integrated with a bearing cap,
A plurality of bearing caps occupy the internal space of the oil pan, and they extend to the upper surface of the opening of the oil pan, and a connection bolt for attaching the oil pan to the cylinder block passes through the oil pan chamber. Therefore, if you try to install an oil pump there, There are restrictions on the mounting position of the oil pump.

[0004] The workability of oil pump installation and its maintenance are not good.

[0005] This causes a reduction in the rigidity of the oil pan itself.

[0006] The configuration of the oil passage connecting the oil pump and each of the lubricated parts is complicated.

There are the following problems.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a novel oil pump mounting device for an engine that solves the above-mentioned problems.

[0009]

According to the first aspect of the present invention, there is provided a bearing cap integrated oil pan at a lower portion of a cylinder block.
In the engine, on the lower surface of the cylinder block,
An oil pan body integrally formed with a plurality of bearing cap portions is fixedly attached. The oil pan body has an opening at one end in the crankshaft direction between the bearing cap portion and a bottom wall thereof. A chamber is formed, and an oil pump is mounted in the oil pan chamber through the opening, and the opening is closed by a lid, whereby the oil pan integrally forms a bearing cap portion. In spite of this, not only the mounting work of the oil pump therein and the subsequent maintenance become easy, but also the mounting position is not restricted.

In order to achieve the above object, according to the second aspect of the present invention, in the first aspect, the lid is fixed to the cylinder block to move the rotational force of a crankshaft. It is characterized by being an extension of the transmission case that covers the transmission mechanism that transmits to the valve camshaft, and the lid that closes the opening of the oil pan thereby uses the transmission case that covers the transmission mechanism. The structure is simplified by reducing the number of points, and further, the assembling work as an oil pan is unnecessary.

According to the third aspect of the present invention, in order to achieve the above object, in the first aspect,
The oil pan chamber is cast-molded by cutting a molding die from one end of the oil pan body in the crankshaft direction,
The oil pump is characterized in that it is mounted in an oil pan chamber near an opening thereof, and thereby, in the oil pan chamber, a cutting draft that expands divergently from the end wall toward the opening is formed. The oil pump is inserted into the oil pan chamber from the opening having the largest opening area in the direction intersecting with the crankshaft, and is mounted there. Installation becomes easier.

According to a fourth aspect of the present invention, in order to achieve the above object, in the first aspect, the oil pan main body is provided at one end in the crankshaft direction having the opening. The oil pump mounting seat and the oil supply passage connecting the oil pump to the oil supply system on the cylinder block side are formed integrally, and the transmission case fastening flange is formed integrally with the other end of the oil pan body in the crankshaft direction. As a result, the configuration of the passage from the oil pump to the oil supply system on the cylinder block side is greatly simplified, and the end of the oil pan chamber in which the fastening flange of the transmission case is integrally formed. The opening side, which is lower in rigidity than the wall side, is reinforced by integral molding of the oil pump mounting seat and oil supply path. Door can be.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

This embodiment is an embodiment in which the present invention is applied to an in-line four-cylinder four-stroke engine.
2 is a partially cutaway side view of the engine, FIG. 2 is a partially cutaway front view of the engine, FIG. 3 is a longitudinal sectional view of the engine taken along line 3-3 in FIG. 1, and FIG. FIG. 5 is a partially enlarged view along line 5-5 in FIG. 1, FIG. 6 is a cross-sectional view along line 6-6 in FIG. 5, and FIG. FIG. 8 is a plan view of the oil pan main body, and FIG. 9 is an end view of the oil pan main body along line 9-9 in FIG.

1 to 4, a four-cycle engine E
The engine body 1 has a cylinder block 2, a cylinder head 3 connected to the deck surface thereof by a connecting bolt with a gasket interposed therebetween, and a connecting bolt formed on the lower end surface of the cylinder block 2 on the crankcase side by a packing bolt. And an oil pan (hereinafter simply referred to as an oil pan) 4 integrated with a bearing cap.

As is clearly shown in FIG. 3, a plurality of bolt through holes 7 ₁ , 17 ₁ ; 7 ₂ , 17 which coincide with each other are provided on the front and rear sides of the cylinder block 2 and the cylinder head 3 in the width direction, ie, both sides in the crankshaft direction. _The cylinder head 3, the cylinder block 2, and the oil pan 4 are connected to the bolt holes 7 ₁ , 17 ₁ from the cylinder head 3 side;
A plurality of bearing cap portions (first to fifth bearing cap portions) 4B of the oil pan 4 penetrating through the holes 7 ₂ and 17 _2
1 ～4B ₅ blind threaded holes 19 ₁ formed in, 19 screwed into the _2, are coupled together by a plurality of through bolts 38 _1, 38 _2.

As shown in FIGS. 1 and 2, the cylinder block 2 is formed with four cylinder bores 5 arranged in series and a water jacket 6 surrounding the cylinder bores. Bolt through hole 7
_1, 7 ₂ are provided.

A piston 8 is provided in the four cylinder bores 5.
There slidably fitted in each, and the cylinder block 2, and the lower surface of the crankcase, said oil pan main body 4 ₁ of between the plurality of bearing cap portion 4B ₁ ~4B ₅ freely crankshaft 9 is rotated The connecting rod 10 is connected between the crank pin of the crank shaft 9 and the piston pin of the piston 8. A valve camshaft 11 is rotatably supported by the cylinder head 3. The valve camshaft 11 and intake and exhaust valves 14, 15 provided between the camshaft 11 and the valve camshaft 11 are interlocked as usual. hand,
A conventionally known valve operating mechanism 16 that opens and closes them at a predetermined timing is provided. Also, the valve operating camshaft 11
A plurality of bolt insertion holes 17 ₁ and 17 ₁ , which correspond to the bolt insertion holes 7 ₁ and 7 ₂ on the cylinder block 2 side,
17 ₂ is arranged in the crankshaft 9 direction. Further, a head cover 18 covering the valve mechanism 16 is fixed to the upper surface of the cylinder head 3 via packing.

As shown in FIG. 1, a transmission mechanism 12 is provided between the outer end of the valve camshaft 11 and the outer end of the crankshaft 9.
Are connected. The transmission mechanism 12 includes a crankshaft 9
, A driven sprocket 45 fixed to the outer end of the valve train camshaft 11, and an endless transmission chain 47 wound between the sprockets 45, 46. The driving force of the crankshaft 9 is transmitted to the valve camshaft 11 via the transmission mechanism 12 with a reduction ratio of 1/2. Also this transmission mechanism 12 is fixed to the transmission case portion 3 ₁ which is formed integrally at one end of the crankshaft direction of the cylinder head 3, a plurality of connecting bolts 29 to one end surface of the crankshaft direction of the cylinder block 2 It is covered by the transmission case 13. The transmission case 13 includes the cylinder block 2
Extension 13e which is extended downwardly than is integrally formed, the extension portion 13e closes the oil pan main body 4 _first opening 24 to be described later, constitutes the lid of the oil pan 4 cage, the extension 13e That lid has a plurality of bolts 29 is fixed to the opening 24 of the oil pan main body 4 _1, and therefore an oil pan main body 4 _1, extension of the transmission case 13 (lid member) 13e Thus, the oil pan 4 of the engine E is configured. As is clearly shown in FIG. 6, the extension 13 e of the transmission case 13 has a U-shaped vertical section and projects outward in the crankshaft direction, so that the capacity of the oil pan chamber Co of the oil pan 4 is reduced. It is enlarged.

As shown in FIG. 6, one end of the crankshaft 9 penetrates through the shaft hole 50 of the transmission case 13 and protrudes to the outside. A drive wheel, that is, a drive pulley 48 is fixed to the outer end. , The driving pulley 48 is connected to the endless transmission belt 4.
9 is linked to engine accessories such as a water pump (not shown). The shaft hole 50 of the crankshaft 9 and the transmission case 13
The oil seal means 54 is interposed between the two. In the transmission case 13, another driving sprocket 51 is fixed to the crankshaft 9 adjacent to the driving sprocket 45, and this driving sprocket 51 is used for driving an oil pump Op attached to the bottom in the oil pan chamber Co. The sprocket 52 is connected via an endless chain 53, and the rotation of the crankshaft 9 drives the oil pump Op.

[0021] The oil pan 4, the oil pan body 4 ₁ which is a main portion, Fe, is cast in one piece of a metal material such as Al alloy. This oil pan body 4 ₁
Are fixed to the lower surface of the cylinder block 2 by connecting bolts 35, and as clearly shown in FIGS.
It is formed by left and right walls 21 and 22 and an end wall 23, and has an opening 24 that opens at one end face of the transmission mechanism 12 in the crankshaft direction. A plurality of bolt holes 25 are provided in the periphery thereof, and are flush with one end surface 30 (see FIG. 4) of the cylinder block 2.
The transmission case 13 is fixed via a packing by a plurality of connection bolts 29. And the opening 24 of the oil pan main body 4 ₁ As described above the lower portion of the extension portion of the transmission case 13 is covered by a (lid) 13e, an extension of the oil pan main body 4 _1, the transmission case 13 (lid member) The oil pan 4 of the engine E is constituted by 13e.

[0022] As clearly shown in FIGS. 7 and 8, the oil pan main body 4 in _1, and presence of the substantially equal intervals in the crankshaft direction, a plurality of bearing caps in a direction intersecting with the crankshaft 9 Part (first to fifth bearing cap parts)
4B ₁ ~4B ₅ is integrally formed, these bearing cap portion 4B ₁ ~4B ₅ are all be made of a vertical wall relative to the crank axis, their right and left side ends, wherein The left and right walls 21 and 22 are integrally connected to each other. One outermost of the oil pan main body 4 _1, i.e. on the opposite side of the opening 24, the flange 4f for fastening the transmission case are integrally formed, the outermost bearing cap section (fifth bearing the cap portion) 4B _5, constitutes a part of the end wall 23 be integral with the oil pan main body 4 ₁ of the end wall 23 (see FIG. 1).

A plurality of bearing caps 4B _{1 to} 4B
_A lower half 26 of a semi-circular bearing is formed at the center of the upper surface of _{5, and} the lower half 26 of the bearing is formed integrally with a crankcase portion below the cylinder block 2. A crank bearing hole 2 for supporting the crank shaft 9 rotatably in cooperation with a plurality of semi-circular bearing upper halves 27.
8 (see FIG. 3).

[0024] in the lower half of the oil pan main body 4 _1, the bottom wall 20, side walls 21 and 22, by a bottom end wall 23 and a plurality of bearing cap portion 4B ₁ ~4B _5, one in the crankshaft direction A cave-shaped oil pan chamber Co that is open to the end face, that is, the opening 24 and that is continuous in the crankshaft direction is formed. This oil pan chamber Co
The oil pan main body 4 ₁ when cast integrally molded, shaped as a hole punching cast by stamping the mold core or the like, the oil pan body 4 ₁ of the bottom wall 20 and the left and right side walls 21,2
And 2 of the inner surface, a plurality of bearing cap portion 4B ₁ ~4B
Bottom ₅ is a cross section intersecting the crankshaft 9 is formed in the same shape, and are stamped gradient extending divergent is formed from the oil pan main body 4 _first end wall 23 along the opening 24, which As a result, the crankshaft 9 of the oil pan chamber Co
The cross-sectional area in the direction intersecting with the oil pan chamber Co is largest at the opening 24 side, and the lower surface of the oil pan chamber Co is the end wall 2.
3 is formed on an inclined surface having a downward slope toward the opening 24. Corresponding to the bottom of the oil pan main body 4 _first opening 24, the lowermost end of the extension portion 13e of the transmission case 13,
A boss 55 is formed, and an oil outlet 56 is opened in the boss 55, and the oil outlet 56 is closed by screwing a plug, that is, a drain bolt 57.

The oil pan chamber Co can be formed as a tunnel-shaped cast hole having both open end walls in the direction crossing the crankshaft direction.

The plurality of bearing cap portions (first to first bearing cap portions)
Between the fifth bearing cap section) 4B ₁ ~4B ₅ phase adjacent ones, in the right and left sides of a direction intersecting the crankshaft 9, respectively, are connected together by lateral baffle plates 31 and 32, these baffle plates Numeral 31 extends in the lateral direction so as to partition a part of the communication part between the crank chamber Cc and the oil pan chamber Co in the oil pan 4, and suppresses the waving of the lubricating oil in the oil pan chamber Co. One-way rotation of the crankshaft 9 (FIGS. 2, 3
The baffle plate on the side where the lubricating oil is jumped up in the direction of arrow a), that is, in FIG.
The reinforcing walls 33 projecting toward the c-side are integrally formed, and these reinforcing walls 33 are formed by the baffle plate 31.
Contribute to securing the rigidity of the bearing cap portion 4B ₁ ~4B ₅ in cooperation with the. A pair of rib pieces 34 are integrally formed at both ends in the longitudinal direction of the reinforcing wall 33, respectively. The rib pieces 34 lubricate the oil pan chamber Co by rotation of the crankshaft 9. Helps control oil bounce.

As is clearly shown in FIG. 3, the bearing caps 4B _{1 to} 4B ₅ are formed with concave portions 36, 37 which are respectively opened to the upper surface on the left and right sides of the upper surface, and open into the concave portions 36. , The blind screw hole 19 ₁ , 1
9 ₂ are formed, and the blind screw holes 19 ₁ , 19
_2, the through-bolts 38 _1, 38 ₂ is screwed.

As shown in FIG. 3, the recesses 3 on one side of the crankshaft 9 of the bearing caps 4B _{1 to} 4B ₅ are provided.
6 forms an oil supply passage 40 together with a concave portion 39 on one side of the cylinder block 2 side. ₁ , 17 ₁ and through bolt 38
_The oil is supplied to a lubricated portion of the engine through an oil passage 43 formed between the two. On the other hand, bearing cap 4B ₁
Of ～4B _5, the recess 37 of the other side of the crank shaft cooperates with the other of the recessed portion 41 of the cylinder block 2 side forms an oil passage 42 back communicates with the oil pan chamber Co, this return fluid passage 42 is an oil passage 4 between the bolt through holes 7 ₂ and 17 ₂ on the other side of the crankshaft 9 and the through bolt 38 _2.
4 and the oil after lubrication is transferred to the oil pan chamber C.
lead to o.

As shown in Figures 7-9, the oil pan body 4 ₁ of the bottom wall 20, the side closer to the opening 24 bottom wall 2
0, a mounting seat 70 for the oil pump Op is integrally formed. On the upper surface of the mounting seat 70, three mounting portions 71, 72, 73 each having an opening for each mounting hole are provided. during the in parts 4B ₁ ~4B _3, are integrally formed at the respective vertices of a triangle, the oil pump Op that from the opening 24 placed in the oil pan chamber Co
Are attached to the fixing portions 17, 72, 73 with the fixing bolts 7.
4 and attached together. In this case, each of the three mounting portions 71, 72, 73 is a bearing cap portion 4
By being located between the B ₁ ~4B _3, good attachment of the oil pump Op. Also the side close to the opening 24 is an oil pan main body 4 _first bearing cap section positioned in the crankshaft direction central portion (third bearing cap section) opening 24 side than 4B ₃ in this embodiment , preferably it outside of the bearing cap portion than (second bearing cap section) than 4B ₂ openings 24
Side. At one end of the mounting seat 70, an entrance 75 is provided.
The inlet 75 is connected to the oil pump Op.
Is communicated with the discharge port. The oil pan main body 4 ₁ of the bottom wall 20, communicates with the inlet 75, lateral bottom oil supply passage 76b are formed integrally, further oil pan main body 4 ₁
Outside one corner of the opening 24, a vertical side oil supply passage 76s communicating with the bottom oil supply passage 76b is integrally formed. The side oil supply passage 76s is formed in the oil pan body 4 _1. the upper surface that is, an opening on the coupling face of the cylinder block 2, when the cylinder block 2 is coupled to the oil pan main body 4 _1, that cylinder block 2
It is connected to a lubrication system formed on the side. The bottom and side oil supply passages 76b and 76s are connected to an oil pump Op.
If, constitute the oil supply passage 76 that communicates the oil supply system of the cylinder block 2 side, the oil supply passage 76 is only joined to the cylinder block 2 to the oil pan main body 4 _1, and the oil pump Op, cylinder block The oil supply system on the two sides can be communicated, and the configuration of the oil passage therebetween is simplified. Also, the oil supply passage 76 is formed integrally at the time of casting the oil pan main body 4 _1, the oil pan body 4 _1, are especially helpful to increase the rigidity of the opening portion 24 side significantly.

On the mounting side of the intake system member In of the engine body 1, the bearing cap 4 of the oil pan 4
A plurality of thick boss-shaped mounting portions 61 are integrally formed outwardly on the outer surface of the boundary wall between B _{1 to} 4B ₅ and the oil pan chamber Co at intervals in the direction of the crankshaft 9. The lower part of the intake system member In is fixed to these mounting portions 61 by fixing members 62 such as bolts. The intake system member I
Although n is an intake manifold in this embodiment, it may be replaced with a throttle body, an intake duct, an intake chamber, an air cleaner, or the like.

In the figure, Fu is a fuel supply unit having a fuel injection nozzle attached to the intake system member In, and Ex is an exhaust system member attached to the other side of the engine body 1.

When the wet sump type engine E is operated, the rotation of the crankshaft 9 causes the transmission mechanism 12 to rotate.
The camshaft 11 is driven through the drive mechanism to operate the valve mechanism 16, and the drive pulley 48 is driven to drive the endless transmission belt 4.
9, an engine accessory such as a water pump is driven, and furthermore, an oil pump Op is driven through the driving sprocket 51, the chain 53 and the driving sprocket 52, and the lubricating oil in the oil pan chamber Co is sucked up. Thus, the lubricated portions of the engine E are forcibly lubricated. A part of the pressurized lubricating oil discharged from the oil pump Op is supplied to the lubricated portion on the cylinder block 2 side through the oil supply passage 76.

By the way to the oil pan main body 4 ₁ and its bearing cap portion 4B ₁ ~4B _5, between the bottom wall 20, the oil pan chamber Co is formed having an opening 24 at one end of the crankshaft direction In the oil pan chamber Co, an oil pump Op is mounted on the mounting seat 70 on the bottom wall 29 near the opening 24 through the opening 24, and the opening 24 is closed by the lid 13e. Thus, the oil pan 4 is configured, and the oil pan 4
Is despite molding the bearing cap portion 4B ₁ ~4B ₅ together, not only the mounting work and the subsequent maintenance of the oil pump Op to the inside is easily, be restricted by the mounting position Absent.

The lid 13e for closing the opening 24 of the oil pan 4 uses the transmission case 13 that covers the transmission mechanism 12, so that the number of parts is reduced and the structure is simplified, and the oil pan 4 The assembling work of No. 4 is unnecessary.

Furthermore the oil pan chamber Co, said oil pan main body 4 ₁ is vent casting by stamping mold molding from one end of the crankshaft direction, the divergent shape toward the opening 24 from the end wall 23 The oil pump Op is inserted into the oil pan chamber Co through the opening 24 having the largest opening area in the direction intersecting with the crankshaft 9 and is attached thereto. Thus, the attachment of the oil pan Op to the oil pan chamber Co is further facilitated.

[0036] Furthermore, the oil pan body 4 ₁ in the crankshaft direction of the end having the opening 24, the mounting seat 70 and the oil pump O of the oil pump Op
p and the oil supply system on the cylinder block 2 side are integrally formed with an oil supply passage 76, so that the oil pump Op
The configuration of the passage from the cylinder to the oil supply system on the cylinder block 2 side is greatly simplified, and the rigidity of the oil pan chamber Co is lower than that of the end wall 23 on which the fastening flange 4f of the transmission case is integrally formed. The opening 24 side can be reinforced by integral molding of the mounting seat 70 of the oil pump Op and the oil supply passage 76, and the oil pan 4 can be formed with high rigidity over the entire area.

Further, in the engine E, the transmission mechanism 12
By some of utilizing transmission case 13 covering the oil pan 4 is configured to, while reducing the size of the oil pan main body 4 ₁ itself is fixed to the lower surface of the cylinder block 2, required, sufficient lubrication An extension 13e of the transmission case 13 which secures the oil amount and becomes a part of the oil pan 4.
Is formed so as to protrude outward so as to occupy the dead space below the drive pulley 48, and the dead space can be effectively used without increasing the size of the engine E itself.

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various embodiments are possible within the scope of the present invention. For example, in the above-described embodiment, the case where the present invention is applied to a four-cylinder in-line engine has been described. However, it goes without saying that the present invention can be applied to other types of single-cylinder or multi-cylinder engines. In the embodiment, a chain transmission mechanism is adopted as a transmission mechanism for interlocking the crankshaft and the valve operating camshaft. However, a gear transmission mechanism, a belt transmission mechanism, or another transmission mechanism may be employed instead. The type of the oil pump is not limited as long as it can be used as a lubrication pump for this type of engine.

[0039]

As described above, according to the first aspect of the present invention, in the cylinder block-integrated engine, the oil pan body integrally formed with the bearing cap is provided with the bearing cap and the bottom wall. Between
An oil pan chamber having an opening at one end in the direction of the crankshaft is formed, and an oil pump is mounted in the oil pan chamber through the opening, and the opening is closed by a lid. Despite the fact that the cap portion is integrally formed, not only the work of attaching the oil pump to the inside thereof but also the maintenance thereof become easy, and there is no restriction on the attachment position.

According to the second aspect of the present invention, in the first aspect, the lid is fixed to the cylinder block, and transmits the rotational force of the crankshaft to the valve gear camshaft. Since it is a part of the transmission case that covers the transmission mechanism, the lid that closes the opening of the oil pan uses a transmission case that covers the transmission mechanism, and the structure is simplified by reducing the number of parts, In addition, the work of assembling the oil pan is unnecessary.

Further, according to the third aspect of the present invention, in the first aspect, the oil pan chamber is provided with:
The oil pump is cast-molded by cutting a molding die from one end in the crankshaft direction of the oil pan body, and the oil pump is
Since the oil pump is installed in the oil pan chamber near the opening, a draft angle is formed that expands divergently from the end wall toward the opening, and the oil pump has:
The oil pan is inserted into the oil pan chamber from the opening having the largest opening area in the direction intersecting with the crankshaft, and is attached thereto, so that the oil pan can be more easily attached to the oil pan chamber.

According to a fourth aspect of the present invention, in the first aspect, the oil pan main body is provided at one end in the crankshaft direction having the opening.
A mounting seat for the oil pump and an oil supply passage communicating the oil pump with the oil supply system on the cylinder block side are integrally formed, and a fastening flange of a transmission case is integrally formed with the other end of the oil pan body in the crankshaft direction. Because of this, the configuration of the passage from the oil pump to the oil supply system on the cylinder block side is greatly simplified, and compared to the end wall side of the oil pan chamber where the fastening flange of the transmission case is integrally formed. The opening side having low rigidity can be reinforced by integrally forming the mounting seat of the oil pump and the oil supply passage, and the oil pan can be formed with high rigidity over the entire area.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of an engine.

FIG. 2 is a partially cutaway front view of the engine.

FIG. 3 is a longitudinal sectional view of the engine taken along line 3-3 in FIG.

FIG. 4 is a partial side view of the engine taken along line 4-4 in FIG. 2;

FIG. 5 is a partially enlarged view along line 5-5 in FIG. 1;

FIG. 6 is a sectional view taken along the line 6-6 in FIG. 5;

FIG. 7 is a perspective view of an oil pan main body.

FIG. 8 is a plan view of an oil pan main body.

9 is an end view of the oil pan main body along line 9-9 in FIG. 8;

[Explanation of symbols]

2 ・ ・ ・ Cylinder block 4 ・ ・ ・ Cylinder head integrated oil pan 4 ₁・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Oil pan body 4B ₁ ... 4B ₅ ... bearing cap part 4f ... flange (for fastening the transmission case) 9 ... crankshaft 11 ... ··· Valve camshaft 12 ······· Transmission mechanism 13 ········ Transmission case 13e Extension part) 24 Open part (of oil pan main body) Co ... Oil pan chamber Op ... Oil pump

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F02F 7/00 301 F02F 7/00 301F

Claims (4)

[Claims] 1. A bearing at a lower portion of a cylinder block (2).
Equipped with an oil pan (4)
A plurality of bearings on a lower surface of the cylinder block (2).
Cap (4B ₁~ 4B_Five) Formed integrally
Irpan body (4₁) Is fixed, this oil pan body
(4₁) Has its bearing cap (4B₁~ 4
B_Five) And its bottom wall (20) in the direction of the crankshaft.
Oil chamber (Co) having an opening (24) at one end of the pan
Is formed in the oil pan chamber (Co).
Oil pump (Op) is attached through the mouth (24)
The opening (24) is closed by a lid (13e).
Oil pump in an engine, characterized in that
Mounting device. 2. The cover (13e) is fixed to the cylinder block (2), and covers a transmission mechanism (12) for transmitting a rotational force of a crankshaft (9) to a valve gear camshaft (11). The mounting device for an oil pump in an engine according to claim 1, characterized in that the mounting device is an extension of a transmission case (13). Wherein said oil pan chamber (Co), said oil pan body (4 ₁₎ is stamped and formed casting by stamping of the mold from the crankshaft direction end of the oil pump (O
p) is the oil pan chamber (C) near its opening (24).
2. The mounting device for an oil pump in an engine according to claim 1, wherein the mounting device is mounted in o). 4. The oil pan body (4 ₁ ) includes a mounting seat (70) for the oil pump (Op), an oil pump (Op), and a cylinder at one end in the crankshaft direction having the opening (24). An oil supply passage (76) communicating with the oil supply system on the block (2) side is formed integrally, and a fastening flange (4f) of a transmission case is provided at the other end of the oil pan body (4 ₁ ) in the crankshaft direction. The oil pump mounting device for an engine according to claim 1, wherein the mounting device is formed integrally.