JP2001241313A - Lubricating oil supplying device of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating oil supplying device of an internal combustion engine capable of preventing an impurity from mixing with lubricating oil supplied to a supercharger without complicating a structure. SOLUTION: This device is provided with an engine oiling pump for supplying lubricating oil in an engine oiling tank to each part in the internal combustion engine, a supercharger oiling pump for supplying lubricating oil in the supercharger oiling tank to a supercharger, and an auxiliary pump for supplying lubricating oil to each part in the internal combustion engine and the supercharger at least in one case of just after stopping, during stopping, or just before starting of the internal combustion engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil supply device for an internal combustion engine that supplies lubricating oil to a supercharger and various parts of the engine.

[0002]

2. Description of the Related Art A conventional lubricating oil supply system for an internal combustion engine includes an internal combustion engine and a supercharger which are supplied from a common oil supply tank (system lubrication system). There are two refueling tanks, each of which is separately supplied.

FIG. 4 is a schematic diagram of a conventional lubricating device of a system lubricating system, and FIG. 5 is a schematic diagram of a conventional lubricating device of a separate lubricating system. Although the lubricating oil supplied to the turbocharger is hardly contaminated even after lubrication, impurities are mixed in the lubricating oil that has lubricated each part of the internal combustion engine. Conversely, the lubricating oil supplied to the supercharger needs to be cleaner than the lubricating oil supplied to each part of the internal combustion engine. In the lubricating apparatus 300 of the system lubricating type shown in FIG. 4, the lubricating oil in the oil pan 51 is mostly sent to the lubricating oil main gallery 56 by the pump 52 via the cooler 53 and the filter 54, 50 are supplied to each part. Also,
The lubricating oil in the lubricating oil main gallery 56 is
Is also supplied to the supercharger 58. The lubricating oil supplied to each part of the engine 50 and the lubricating oil supplied to the supercharger 58 return to the oil pan 51, respectively.

On the other hand, a part of the lubricating oil sucked up by the pump 52 is sent to a centrifugal strainer 55, purified by the centrifugal strainer 55, and returned to the oil pan 51 again. It purifies the lubricating oil inside. Such a system lubrication system 300
, The engine oil 50 in the same oil pan 51
And the supercharger 58 are lubricated. Therefore, the lubricating oil supplied to the supercharger 58 is supplied to the supercharger 58 after the impurities are removed by the filter 57 on the way, and after being purified. In this case, it is desirable that the filter 57 be fine in order to maintain the cleanliness of the lubricating oil supplied to the supercharger 58 at a constant level. Life is shortened. Therefore, maintenance of the filter 57 must be performed frequently.

[0005] A lubricating device 4 of a separate lubrication system shown in FIG.
At 00, the lubricating oil supplied to the supercharger 60 is stored in a dedicated tank 71, and the lubricating oil supplied to each part of the engine is stored in another tank (oil pan) not shown.

In the lubricating device 400 shown in FIG. 5, the lubricating oil in the tank 71 is supplied to the cooler 69 (the thermostat 7) by the pump 65.
The temperature is set to a constant range by 0), and is supplied to the supercharger 60 via the filter 72 and the pressure gauge 63.
The lubricating oil is kept in a certain temperature range by the cooler 69, a predetermined cleanliness is kept by the filter 72, and it is checked by the pressure gauge 63 whether or not the lubricating oil supply amount has reached a required supply amount. When the supply amount of the lubricating oil is insufficient, the pressure drop detection switch 64 is operated, and an alarm (not shown) is issued to notify the worker. In addition, supercharger 6
The supercharger 60 is provided with a pressure regulating valve 62 so that excessive pressure is not applied to zero.

Further, when air is mixed in the lubricating oil that lubricates the supercharger 60, only the air is supplied to the supercharger 6.
A separator 61 is provided for returning to 0 and returning the lubricating oil to the tank 71. While the engine (not shown) is operating, the pump 65 supplies lubricating oil to the supercharger 60.
Immediately before the start, the lubricating oil in the tank 71 is supplied to the supercharger 60 by the auxiliary pump 66.

The lubricating apparatus 400 shown in FIG. 5 can supply cleaner lubricant to the supercharger 60 than the lubricating apparatus 300 shown in FIG. 4, and the filter 72 is compared with the filter 57 of the lubricating apparatus 300 shown in FIG. Maintenance is easy. However, an engine not shown in the refueling device 400 of FIG.
The components corresponding to the pump 52, the cooler 53, the filter 54, and the oil pan 51 shown in FIG. 4 are provided. In this regard, the oil supply device 400 in FIG. 5 has a more complicated configuration than the oil supply device 300 in FIG. I have.

[0009]

As described above, FIG.
Although the lubricating device 300 of FIG. 5 has a simple structure, the lubricating oil supplied to the supercharger 58 tends to contain impurities, and the lubricating device 400 of FIG. 5 has a more complicated structure than the lubricating device 300 of FIG. Become. Therefore, an object of the present invention is to provide a lubricating oil supply device for an internal combustion engine in which the structure is not complicated and impurities are hardly mixed in the lubricating oil supplied to the supercharger.

[0010]

According to a first aspect of the present invention, there is provided an engine lubrication pump for supplying lubricating oil in an engine lubrication tank to various parts of an internal combustion engine. Equipped with a turbocharger lubrication pump that supplies lubricating oil in the tank to the supercharger, and supplies lubricating oil to each part of the internal combustion engine and the turbocharger at least one of immediately after stopping, immediately before stopping, and immediately before starting the internal combustion engine Auxiliary pump. Claim 2
According to the invention of claim 1, the lubricating oil supplied from the supercharger lubrication tank to the supercharger during operation of the internal combustion engine is returned to the supercharger lubrication tank during the operation of the internal combustion engine. When lubricating oil in the engine lubrication tank is supplied to the supercharger during at least one of during and immediately before starting, lubrication oil that lubricates the supercharger is returned to the engine lubrication tank. Oil passage switching means is provided.

[0011]

FIG. 1 is a system schematic diagram of a lubricating oil supply apparatus 100 for an internal combustion engine according to the first and second aspects of the present invention. In FIG. 1, a lubricating apparatus 100 includes a supercharger lubrication tank 2 storing lubricating oil and an engine lubrication tank 10.
It has two tanks.

The lubricating oil in the supercharger lubrication tank 2 is sucked up by the supercharger lubrication pump 3 through a pipe 18 provided with a check valve 4 on the way, and the pipes 19 and 20, a filter 5 and a pressure It is supplied to the supercharger 1 via a pipe 21 provided with a total 6 and a pressure drop detection switch 7. The lubricating oil that has lubricated the supercharger 1 returns to the supercharger lubrication tank 2 through the pipe 23. The pipe 21 and the pipe 23 are connected by a pipe 22 provided with the pressure regulating valve 8 on the way.

The lubricating oil sucked up from the supercharger lubrication tank 2 by the supercharger lubrication pump 3 is maintained at a certain level of cleanliness by the filter 5 and reaches the required amount by the pressure gauge 6. Is checked. If the supply amount of the lubricating oil is insufficient, the pressure drop detection switch 7 is operated, and an alarm (not shown) is issued to notify the worker. Further, the pressure regulating valve 8 prevents excessive pressure from being applied to the supercharger 1. The pressure regulating valve 8 operates when excessive lubricating oil is supplied to the supercharger 1, and releases excess lubricating oil to the pipe 23 via the pipe 22 to protect the supercharger 1.

On the other hand, the lubricating oil in the engine lubrication tank 10 is sucked up by an engine lubrication pump 11 to an engine (not shown), and supplied to various parts of the engine (not shown) via a pipe 25. At this time, a part of lubricating oil is supplied into the supercharger lubrication tank 2 via a pipe 26 branched from the pipe 25 and a pipe 27 provided with the filter 12 in the middle. Further, the lubricating oil supplied to each part of the engine is collected in the tank 10 via the pipe 31.

As the filter 12, for example, a centrifugal strainer can be used, and the filter 12 makes the lubricating oil in the engine lubrication tank 10 as clean as the lubricating oil in the supercharger lubrication tank. Filter. Since the lubricating oil in the supercharger lubrication tank 2 is replenished in this way, the amount of the lubricating oil stored in the supercharger lubrication tank 2 is a predetermined amount even when the lubricating oil is consumed in the supercharger 1. Can be maintained.

The supercharger lubrication tank 2 and the engine lubrication tank 10 are connected by a pipe 14, and when the oil level 30 of the lubricating oil in the supercharger lubrication tank 2 reaches the height of the pipe 14. The lubricating oil in the supercharger lubrication tank 2 flows out to the engine lubrication tank 10 through the pipe 14.

The engine lubrication tank 10 is provided with a pipe (not shown) for replenishing lubricating oil. When the oil level of the lubricating oil in the engine lubrication tank 10 drops to a predetermined level, this pipe is opened. Lubricating oil is to be replenished via the.

The supercharger lubrication tank 2 and the engine lubrication tank 10 are connected by a pipe 9 separately from the pipe 14. Tube 9
Is provided with a switching valve 13 (lubricating oil passage switching means).
The switching valve 13 is supplied with hydraulic pressure via a pipe 26, and the switching valve 13 is operated during the operation of the engine (the engine lubrication pump 1).
1 (during operation), the pipe 9 is closed as shown in FIG.

During operation of the engine, the lubricating oil lubricating the turbocharger 1 is supplied to the pipe 9 through the pipe 23 as shown in FIG.
Enters the pipe 9 from the upward open end, but cannot pass through the pipe 9 by the switching valve 13, so that the overflow occurs as shown by the arrow and the supercharger lubrication tank 2
Return inside. The lubricating oil supplied to each part of the engine returns to the engine lubrication tank 10 via the pipe 31.

Before starting the engine, the lubricating oil can be distributed to the turbocharger 1 and various parts of the engine in advance so that the engine can be started smoothly. In this case, the auxiliary pump 17
On the one hand, lubricating oil is supplied to each part of the engine via the pipes 28 and 29 and the check valve 16, and on the other hand the pipes 28 and 29 and the pipe 20 having the check valve 15 A small amount of lubricating oil in the engine lubrication tank 10 is supplied to the supercharger 1 via the pipe 5 and the pipe 21.

At this time, the engine lubrication pump 11 is not operating, the hydraulic pressure is not supplied to the switching valve 13 via the pipe 26, and the switching valve 13 opens the pipe 9 as shown in FIG. ing. The lubricating oil supplied to the supercharger 1 is the lubricating oil in the engine lubrication tank 10.
It returns to the engine lubrication tank 10 via the pipe 9.

When the engine is stopped, the engine lubrication pump 11
In addition, since the turbocharger lubrication pump 3 is also stopped at the same time, it is necessary to supply lubricating oil by the auxiliary pump 17 and cool it in order to prevent seizure of various parts of the engine and the supercharger 1. Also in this case, the lubricating oil in the engine lubrication tank 10 supplied to the supercharger 1 returns to the engine lubrication tank 10 via the pipe 9. In the refueling device 100, one auxiliary pump 1
7, the lubricating oil in the engine lubrication tank 10 can be supplied to both the engine parts and the supercharger 1.

The required degree of cleanliness differs between the lubricating oil used in each part of the engine and the lubricating oil used in the supercharger 1. Although it is necessary to supply cleaner lubricant than the above, in the invention of claim 1, the supercharger lubrication tank 2 supplied to the supercharger 1 is provided.
Engine lubrication tank 1 that supplies lubricating oil in the engine to various parts of the engine
The filter 5 can be made more clean by cleaning it
Even if the precision of the oil is improved, clogging is hardly caused, and cleaner lubricant can be supplied to the supercharger 1.

FIG. 3 is a system schematic diagram of a lubricating oil supply device 200 for an internal combustion engine according to the present invention. Refueling device 20
1 is different from the lubricating device 100 shown in FIGS. 1 and 2 in that when supplying the lubricating oil by the auxiliary pump 17, the lubricating oil is supplied to each part of the engine and the supercharger 1 using the supercharger lubrication tank 2 as a supply source. The point of supply.

With the change of the lubricating oil supply source of the auxiliary pump 17 from the engine lubrication tank 10 to the supercharger lubrication tank 2, the pipe 9 and the switching valve 13 of FIG. The lubricating oil supplied to the supercharger 1 by the auxiliary pump 17 is collected in the supercharger lubrication tank 2 through the pipe 23, and the various parts of the engine are supplied from the pipe 29 provided with the check valve 16 in the middle. Is supplied to the engine lubrication tank 10 through the pipe 31. The rest of the configuration and the operation of the refueling device 200 during normal operation are the same as those of the refueling device 100 of FIG.

[0026]

According to the first aspect of the present invention, the lubricating device 100 has a simpler structure than the conventional lubricating device of the conventional lubricating type (FIG. 5).
And a tank for supplying and collecting the lubricating oil to each part of the engine (the engine lubricating tank 10) and a tank for supplying and collecting the lubricating oil to the supercharger 1 (the supercharger lubricating tank 2) ) Are provided separately, so that clean lubricating oil can always be supplied to the supercharger 1.

According to the first aspect of the present invention, the engine lubrication tank 1
0 and the supercharger lubrication tank 2 are provided, so that clean lubricating oil can always be supplied to the supercharger 1 and compared with the case where lubricating oil mixed with impurities is supplied. 1 can be extended.

The provision of the auxiliary pump 17 makes it possible to supply the lubricating oil to each part of the engine and the supercharger 1 immediately after the stop of the internal combustion engine and immediately before the start of the internal combustion engine. Immediately after the stop, the internal combustion engine can be cooled. Immediately before the start, lubricating oil is supplied in advance, so that damage to sliding parts can be prevented, and the internal combustion engine can be protected.

According to the invention of claim 2, when the lubricating oil in the engine lubrication tank 10 is supplied to the supercharger 1 by the auxiliary pump 17, the lubricating oil is recovered to the engine lubrication tank 10 through the pipe 9. Therefore, it is not necessary to mix with the lubricating oil in the supercharger lubrication tank 2 and the lubricating oil in the supercharger lubrication tank 2 can be kept clean.

[Brief description of the drawings]

FIG. 1 is a system schematic diagram of a lubricating oil supply device for an internal combustion engine according to the first and second aspects of the present invention.

2 is a system schematic diagram of a lubricating oil supply device for the internal combustion engine of FIG. 1 when the internal combustion engine is stopped.

FIG. 3 is a system schematic diagram of a lubricating oil supply device for an internal combustion engine according to the invention of claim 2;

FIG. 4 is a system schematic diagram of a conventional lubricating oil supply device for a system lubricated internal combustion engine.

FIG. 5 is a system schematic diagram of a conventional lubricating oil supply device for a bespoke oil type internal combustion engine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 supercharger 2 supercharger lubrication tank 3 supercharger lubrication pump 9 pipe 10 engine lubrication tank 11 engine lubrication pump 12 filter 13 switching valve (lubricating oil passage switching means) 14 pipe 17 auxiliary pump 18 to 29 Piping 100, 200 Lubricating oil supply device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F01M 1/06 F01M 1/06 Q 1/16 1/16 E 9/10 9/10 Z 11/00 11 / 00 S F02B 39/14 F02B 39/14 HJ F term (reference) 3E083 AA01 AA15 AH08 3G005 FA31 FA57 GD07 GD08 3G013 BB14 BC25 BD09 BD46 BD47 CA01 CA16 EA14 3G015 BC01 BL07 BL08 CA07 CA15 DA02 EA09 FB08 FE01

Claims (2)

[Claims] An engine lubrication pump for supplying lubricating oil in an engine lubrication tank to various parts of an internal combustion engine, and a supercharger lubrication pump for supplying lubricating oil in a supercharger lubrication tank to a supercharger. And an auxiliary pump for supplying lubricating oil to each part of the internal combustion engine and a supercharger at least immediately after the stop, during the stop, and immediately before the start of the internal combustion engine. . 2. A method according to claim 1, wherein the lubricating oil supplied from the supercharger lubrication tank to the supercharger during operation of the internal combustion engine is returned to the supercharger lubrication tank. In at least one of them, when the lubricating oil in the engine lubrication tank is supplied to the supercharger, lubricating oil passage switching means for returning the lubricating oil after lubricating the supercharger to the engine lubrication tank is provided. The lubricating oil supply device for an internal combustion engine according to claim 1, further comprising: