JPS6118168Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is related to a lubricating oil circulation system for an internal combustion engine.

The lubricating oil pump sucks in the lubricating oil in the oil pan and discharges it, but if the viscosity of the lubricating oil is too high or the lubricating oil path is clogged, the pressure will be higher than necessary.
Cracks in the pipes can lead to accidents such as pump breakage. To prevent this, a lubricating oil pressure regulating valve is provided midway through the lubricating oil circulation system. Generally, the lubricating oil piping is outside the cylinder block, so in order to return the pressure oil ejected from the lubricating oil pressure adjusting valve to the oil pan, the lubricating oil pressure adjusting valve is installed on the side wall of the cylinder block, and a discharge pipe is opened in the side wall of the cylinder block. It protrudes inside the cylinder block from the inserted insertion hole and returns to the oil pan. However, if the pressure oil released from the discharge pipe splashes on the crankshaft or connecting rod, the lubricating oil will be splashed more than necessary, and it will become a gaseous droplet and burn due to high heat, resulting in lubricant consumption. Since the amount of lubricating oil is large, a notch is provided in the discharge pipe to determine the discharge direction so that the lubricating oil does not go towards these areas, and is configured to ensure that the lubricating oil returns to the inside of the oil pan.

In this method of installing the discharge pipe, conventionally the 10th
As shown in FIGS. 14 to 14, a spacer 27 is specially provided between the cylinder block 1 and the lubricating oil pressure regulating valve 24, and the spacer 27 is a plate held between the mounting surfaces of the two. Fix the pipe 23 and place the spacer 27
The cylinder block 1 and the lubricating oil pressure regulating valve seat 24
By sandwiching and tightening the discharge pipe 23
was fixed in a fixed position.

However, in this method, the spacer 27 is redundant, and a packing is interposed between the spacer 27 and the lubricating oil pressure regulating valve seat 24 to ensure oil tightness, and also to ensure oil tightness between the spacer 27 and the cylinder block 1. Therefore, it was necessary to insert another gasket, and in the end, problems such as lubricant leakage occurred unless two gaskets were sandwiched together to ensure oil tightness.

The purpose of this invention is to eliminate these problems.

Based on the configuration of the embodiment shown in the accompanying drawings,
Let me explain the structure of this invention.

FIG. 1 is an overall side view of the diesel engine. Cylinder heads 3 of the same number as the number of cylinders are placed on the top of the cylinder block 1, and a valve bowl chamber 4 is placed on the top of the cylinder heads 3. An oil pan 2 is attached to the bottom of the cylinder block 1, and the oil filter 1 is inserted from the side of the oil pan 2.
The lubricating oil is sucked into the lubricating oil pump 13 through 4. Pressure is applied by the lubricating oil pump 13 and the lubricating oil is discharged to the discharge pipe 20. 12 is a filter, and 11 is a thermostatic valve. The temperature of the lubricating oil is detected by a thermostatic valve 11, and when the temperature is below a certain level, the lubricating oil flows into the part A of the lubricating oil pressure regulating valve from the bypass 10 without passing through the oil cooler 9. If the temperature is above a certain level, the oil passes through the oil cooler 9 and flows into the lubrication oil pressure regulating valve section A. A portion of the other lubricating oil passes through a pipe 16, a filter 17, and a bypass 18 to lubricate the supercharger 5, and the return oil is returned into the cylinder block 1 through a pipe 19. 6 is air cooler, 8
7 is a fresh water cooler, 7 is an operation instrument panel, 21 is a seawater pump, and 15 is a discharge pipe of a pre-start lubrication pump. 2 is a side sectional view of the lubricating oil regulating valve part A of the present invention, FIG. 3 is a bottom sectional view, FIG. 4 is a rear sectional view, FIG. 5 is a side view of the discharge pipe, and FIG.
FIGS. 9 to 9 are drawings of the discharge pipe 23. FIG. The lubricating oil cooled by the oil cooler 9 flows into the inlet 24b of the lubrication oil pressure regulating valve seat 24, and flows into the bypass 10.
The lubricating oil comes in from the inlet 24a. When the pressure rises above a certain level, the valve 25c lifts up against the spring 25d, and the oil passage 24c
It is ejected into the discharge pipe 23. When the pressure is normal, the oil flows from the oil passage 1a of the cylinder block 1 through the main gear rally to lubricate the crankshaft and the like. 25a is a spring pressure adjustment bolt, 25
b is a lock nut.

In the present invention, the discharge pipe 23 is constructed as shown in FIGS. 6 to 9.

That is, the discharge tube base 23c of the discharge tube 23 is shaped like an ellipse, the minor axis d2 is smaller than the diameter D of the insertion hole 1b formed in a perfect circle of the discharge tube 23 provided in the cylinder block 1, and the major axis d1 is the insertion hole 1b. It is configured to be larger than the diameter D of the hole 1b, and smaller than the diameter of the insertion hole 1b when a perfect circle is formed by the circumferential length of the ellipse.

Then, after flexibly bending the elliptical shape of the discharge tube base 23c into a shape close to a perfect circle and forcefully inserting it into the perfectly circular insertion hole 1b, while returning it to the original oval shape, an attempt is made to fix it using elastic force. It is something to do.

Furthermore, a notch 23a having a certain directionality is provided at the tip of the discharge tube 23.

Further, a discharge pipe 2 is provided at the end of the discharge pipe base 23c.
Positioning pieces 23b, each of which is partially bent outward, are provided at two locations. Release pipe 23 of the present invention
There is a small amount of lubricating oil in the oil pan and the discharge pipe 2.
This is a part where there is no problem even if it flows in without passing through 3.
The shape of the discharge tube base 23c can be configured into an elliptical shape. The point is that the notch 23a that determines the jetting direction should be attached facing a certain direction and not easily removed. A positioning piece 23b.23b provided at the base of the discharge pipe 23 is located in a recess 1e.1 provided in the outer wall of the cylinder block 1 as shown in FIG.
By fitting into the hole e, the ejection direction of the discharge pipe can be determined so that it is always at a constant position.

As described above, the present invention makes the discharge pipe that returns the lubricating oil ejected from the lubricating oil pressure regulating valve into the cylinder block smaller in diameter than the insertion hole 1b of the cylinder block 1, and elastically bends the base of the discharge pipe provided with the positioning piece. The discharge pipe is positioned and inserted into the insertion hole 1b, and the base of the discharge pipe is locked between the lubricating oil pressure control valve seat and the wall surface of the cylinder block, so the fixed direction can be determined by the configuration of the discharge pipe without using a spacer as in the conventional method. This also eliminates lubricant leakage from the spacer and reduces costs.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the diesel engine, Fig. 2 is a side sectional view of the lubricating oil pressure regulating valve part A of the present invention, Fig. 3 is a bottom sectional view, Fig. 4 is a rear sectional view, and Fig. 5 is a side view of the discharge tube, FIG. 6 is a cross-sectional view of the discharge tube taken along the line B-B in FIG. 7, FIG. 7 is a longitudinal cross-sectional view of the discharge tube, and FIG. Figure 9 is a cross-sectional view of the discharge pipe, Figure 10 is a front sectional view of a conventional lubricating oil pressure regulating valve, Figure 11 is a side view of the same, and Figure 12 is a side view of a conventional spacer and discharge pipe. , FIG. 13 is a front sectional view, and FIG. 14 is a rear view of the discharge tube. 1... Cylinder block, 1b... Insertion hole,
23...Discharge pipe, 23b...Positioning piece, 24...
...Lubrication oil pressure adjustment valve seat, 25...Lubrication oil pressure adjustment valve.

Claims (1)

[Scope of utility model registration request] The discharge pipe that returns the lubricating oil ejected from the lubrication oil pressure adjustment valve into the cylinder block is made smaller in diameter than the insertion hole of the cylinder block, and the base of the discharge pipe with a positioning piece is elastically bent to position and insert it into the insertion hole. A discharge pipe for a lubricating oil pressure regulating valve in an internal combustion engine, characterized in that a base of the discharging pipe is locked between a lubricating oil pressure regulating valve seat and a wall surface of a cylinder block.