JPH0823285B2 - Engine lubricator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lubricating device for an engine mounted on an automobile or the like.

[Prior Art] A dry sump type lubrication device that lubricates the cylinder inner wall and the like using oil in a lubricating oil tank and immediately returns excess oil to the lubricating oil tank by means of an engine It is widely used in high-performance engines due to its low height and good cooling of lubricating oil.

When applying this type of lubricating device to an automobile engine, it is common to provide a lubricating oil tank on the vehicle body side away from the engine body, and use a flexible hose between the lubricating oil tank and the engine body. Connected. This is to absorb the relative motion generated between the lubricating oil tank and the engine body due to engine vibration or vibration associated with operation (for example, JP-B-60-8106, JP-B-59-1041, etc.). reference).

[Problems to be Solved by the Invention] However, in the above-described conventional technique, not only is the oil passage lengthened and complicated, but also the flexible hose forming the oil passage is repeatedly deformed to promote deterioration. There was a problem that the life was shortened by that much and the reliability was lowered.

The present invention has been made in view of the above problems of the above-described conventional technique, and an object of the present invention is to integrate a lubricating oil tank and a lubricating oil pump and to provide a lubricating oil pump for an engine, It is an object of the present invention to provide a compact and reliable engine lubricating device that optimizes the position of the lubricating oil tank, has a good assembling property, is hoseless and stable, and can reliably return oil.

[Means for Solving the Problems] In order to achieve the above object, a lubricating device for an engine according to the present invention has a lubricating oil tank arranged on one side of a crank axis of an engine body. The lubricating oil pump is located between the main bodies, the lubricating oil tank and the lubricating oil pump are integrated, and the lubricating oil tank is directly connected to the engine main body. The lubricating oil pump is located at the same height, and the lubricating oil tank is located below the pump.

[Operation] A lubricating oil tank is arranged on one side of the crank axis of the engine body, and the lubricating oil pump is positioned between the lubricating oil tank and the engine body. Since the lubricating oil tank is directly connected to the engine body by integrating the above, the lubricating oil tank and the engine body are in close proximity to each other, and the crankshaft and the lubricating oil pump are necessarily close to each other, and the oil passage can be shortened. The lubricating oil tank and the engine body vibrate integrally and relative movement does not occur, so that the oil passage can be made hoseless, and the casing or the like forming the oil passage is not deformed.

Further, since the lubricating oil pump is located at substantially the same height as the crankshaft when viewed from the crankshaft direction, and the lubricating oil tank is located below the lubricating oil pump, the lubricating oil is The power can be easily transmitted to the pump, the center of gravity of the engine can be kept low, and the oil can be reliably returned to the lubricating oil tank.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view of a first scavenging pump showing an essential part of an engine provided with a lubricating device according to the present invention, FIG. 2 is a sectional view of the same second scavenging pump, and FIG. 3 is a feed pump. FIG. 4 is a sectional view, FIG. 4 is a side view showing the entire engine, and FIG. 5 is a bottom view of the same. The reference numeral 1 in these drawings is the engine body.

The engine body 1 is composed of a cylinder block 3 that slidably holds a piston 2, a crankcase 4 that covers the lower portion of the cylinder block 3, and the like. A cylinder head 5 having a valve mechanism (not shown) is attached above the cylinder block 3. An intake device 6 is connected to the right side surface of the cylinder head 5, and four exhaust pipes 7, 7 ... Are connected to the left side surface. Reference numeral 8 is a crankshaft having a balance weight 9 and a crankpin 10 rotatably supported in a crank chamber 11, and 12 is a connecting rod connecting the crankpin 10 and the piston 2.

At the bottom of the crankcase 4, the crankcase 4
Oil sumps 13 and 14 for collecting the lubricating oil that has flowed down the wall surface are provided on both left and right sides so as to extend in the front-rear direction of the engine. The oil sumps 13 and 14 are provided with oil strainers 15 and 16, respectively, and a baffle plate 17 is provided above the oil strainers 15 and 16 so as to prevent the lubricating oil in the oil sumps 13 and 14 from scattering. Reference numeral 18 denotes a flange for integrally mounting a lubricating oil tank, which will be described later, on the lower side of the crankcase 4.

Reference numeral 20 is a lubricating oil tank provided on one side of the crankshaft 8 line of the engine body 1, and is provided on the left front part in this embodiment. This lubricating oil tank 20 is in contact with the lower part of the crankcase 4 at the lower part, and is mounted with a screw 22 at the upper part thereof, which is formed so as to provide a space between the crankcase 4 and the cylinder block 3. And a cover 23 for closing the lower side of the tank body 21, and the flange 18 is provided on the lower side of the tank body 21.
A mounting flange 24 is integrally provided so as to face the. twenty five
Is a screw that penetrates the flange 18 and is screwed into the mounting flange 24 to mount the lubricating oil tank 20 to the crankcase 4.

A first scavenge pump 28, a second scavenge pump 29, and a feed pump 30 are interposed in the space provided between the lubricating oil tank 20 and the engine body 1. These lubricating oil pumps have gears 28a, 29a, 30a, respectively.
And casings 28b, 29b, 30b. Further, the first scavenge pump 28, the second scavenge pump 29, and the feed pump 30 are, as shown in FIG.
It is positioned within the width of the lubricating oil tank 20 in the direction of the crankshaft 8 line. The gears 28a, 29a, 30a are one drive shaft to which the rotation of the crankshaft 8 is transmitted via the V belt 31.
It is coaxially mounted on 32. An oil passage is integrally provided in each of the casings 28b, 29b, 30b without a hole. That is, the casing 28b is provided with the first recovery oil passage 35. The first recovery oil passage 35 has one end communicating with the oil sump 14 via the oil strainer 16 and the other end communicating with the lubricating oil 36 stored in the lubricating oil tank 20. Reference numeral 37 denotes a second recovery oil passage provided in the casing 29b, one end of which communicates with the oil sump 13 via the oil strainer 15 and the other end of which communicates with the lubricating oil tank 20. Reference numeral 38 denotes a supply oil passage provided in the casing 30b, which communicates between the lubricating oil 36 in the lubricating oil tank 20 and each not-shown lubricating portion of the engine body 1. 39 is an oil strainer provided at the suction end of the supply oil passage 38, and 40 is a baffle plate surrounding the oil strainer 39, which is provided upright integrally with the tank body 21. Supply oil passage
A lubricating oil filter 41 is provided in the middle of 38, and the oil supply passage 38
The element 42 is attached so as to define the upstream side and the downstream side.

On the end faces of the casings 28b, 29b, 30b on the engine body 1 side, annular grooves are provided at the peripheral edges of the respective oil passages, and between these members and the engine body 1, the O-shaped grooves are filled. Sealed by ring 45. Reference numeral 46 is a lubricating oil pipe that connects the casings 28b, 29b, 30b and the lubricating oil tank 20, and 47 is a breather that connects the inside of the lubricating oil tank 20 and the intake device 6, and circulates blow-by gas to the intake system. .

That is, in this lubricating device, the lubricating oil pump (first and second scavenge pumps 28, 29 and feed pump 30) is located between the lubricating oil tank 20 and the engine body 1, and the lubricating oil tank The lubricating oil tank 20 and the lubricating oil pumps 28, 29 and 30 are integrally formed, and the lubricating oil tank 20 is directly connected to the engine body 1. Further, the lubricating oil pumps 28, 29 and 30 are located at substantially the same height as the crankshaft 8 when viewed from the crankshaft 8 direction, and the lubricating oil tank 20 is located above the lubricating oil pumps 28, 29 and 30. Is also at the bottom.

In the engine lubrication device configured as described above, when the engine is started, the rotation of the crankshaft 8 is transmitted to the drive shaft 32, and the first scavenge pump 28, the second scavenge pump 29, and the feed pump 30. Is driven. Therefore, the lubricating oil 36 in the lubricating oil tank 20 is sucked by the feed pump 30 as shown by an arrow A and is supplied to each lubricating portion of the engine through the supply oil passage 38. Then, the lubricating oil that has lubricated each part and has flowed down the wall surface of the crankcase 4 is lubricated from the oil sump 13, 14 through the first recovery oil passage 35 and the second recovery oil passage 37 as indicated by arrow B. Collected in tank 20.

Here, the lubricating oil tank 20 is provided on one side of the crank axis of the engine body 1, and the lubricating oil tank 20 and the engine body 1 are provided.
Between the lubricating oil pump (first and second scavenge pump 2
8,29 and feed pump 30) are located,
The lubricating oil tank 20 and the lubricating oil pumps 28, 29, and 30 are integrated so that the lubricating oil tank 20 is directly connected to the engine body 1.
As compared with the conventional example, the lubricating oil tank 20 and the engine body 1 can be brought closer to each other, and the distance between the shaft 32 of the lubricating oil pump and the crankshaft 8 is inevitably shortened. Due to this, the power transmission means to the lubricating oil pump can be small, and in addition, the first recovery oil passage 35, the second recovery oil passage 3
The lubricating oil tank 20 and the lubricating oil pumps 28, 29, and 30 are integrated, so that the lubricating oil tank 20 and the lubricating oil tank 38 are integrated, and the lubricating oil tank 20 and the lubricating oil passage 38 can be shortened as much as possible to form a compact lubricating device. And the assembling property is improved. Also,
Since the lubricating oil tank 20 and the engine body 1 vibrate integrally and no relative movement occurs, the oil passage connecting these members can be fixed without a hose to form an oil passage. The casings 28b, 29b, 30b do not deform. Therefore, these members do not deteriorate and can maintain their functions for a long period of time.

Further, the lubricating oil pumps 28, 29 and 30 are connected to the crankshaft 8
It is located at substantially the same height as the crankshaft 8 when viewed from the direction, and the lubricating oil tank 20 includes the lubricating oil pumps 28, 29 and 3
Since it is positioned lower than 0, power can be easily transmitted from the crankshaft 8 to the lubricating oil pump, and the center of gravity of the engine can be kept low to provide a stable lubricating device.
It becomes a lubrication device that can reliably return the oil to 20.

[Effects of the Invention] In the engine lubrication apparatus according to the present invention, the lubricating oil tank is provided on one side of the crank axis of the engine body, and the lubricating oil pump is located between the lubricating oil tank and the engine body. Since the lubricating oil tank and the lubricating oil pump are integrated and the lubricating oil tank is directly connected to the engine body, the lubricating oil tank and the engine body can be brought close to each other, and the power to the lubricating oil pump can be increased. In addition to downsizing the transmission means, the oil passage can be shortened and simplified to provide a compact lubrication device, and since the lubrication oil tank and the lubrication oil pump are integrated, handling and The assembling property can be improved. Further, since the lubricating oil tank and the engine body integrally vibrate and no relative movement occurs, the oil passage connecting these members can be fixed without a hose to form an oil passage. The casing, etc. will not be deformed. Therefore, these members do not deteriorate, and their functions can be maintained for a long period of time to provide a reliable lubricating device.

Further, since the lubricating oil pump is located at substantially the same height as the crankshaft when viewed from the crankshaft direction, and the lubricating oil tank is located below the lubricating oil pump, the lubricating oil is It becomes a stable lubrication device in which the power transmission to the pump is easy and the center of gravity of the engine is kept low, and the lubrication device can surely return the oil to the lubricating oil tank.

[Brief description of drawings]

FIG. 1 is a sectional view of a first scavenging pump showing an essential part of an engine provided with a lubricating device according to the present invention,
2 is a sectional view of the second scavenge pump, FIG. 3 is a sectional view of the feed pump, FIG. 4 is a side view showing the entire engine, and FIG. 5 is a bottom view of the same. 1 …… Engine body, 8 …… Crankshaft, 20 …… Lubricating oil tank, 28,29,30 …… Lubricating oil pump.

Claims (1)

[Claims] 1. A lubricating oil tank is disposed on one side of a crank axis of an engine body, and a lubricating oil pump is located between the lubricating oil tank and the engine body. The lubricating oil tank is directly connected to the engine body by being integrated with a pump, the lubricating oil pump is positioned at substantially the same height as the crankshaft as viewed from the crankshaft direction, and the lubricating oil is positioned below the pump. An engine lubrication device characterized by positioning a tank.