JPH06146835A - Lubricating device for internal combustion engine - Google Patents

Abstract

PURPOSE:To provide the lubricating device of an engine which is enabled to carry out continuous operation of the engine for a long time without stopping the engine in order to change a lube oil filter. CONSTITUTION:A plurality of filters 4, 4... are arranged in a lube oil circuit, and used by changing some of them whenever a change timing comes. And a passage communicating with the filters 4 is shut out so as to change any one of the filters 4 whose change timing comes, during operation. A temperature sensor 32 and or like is provided in a passage 13, and all or a plurality of filters 4 are opened at the time of cold condition in which viscosity of lube oil is high so as to pass lube oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating device for an engine used for a regular generator, a cogeneration system or the like.

[0002]

2. Description of the Related Art Generally, a lubricating oil filter for an engine is usually provided in only one system in the lubricating oil path, and the replacement time of the filter is designated in advance.
It is said that the user must regularly replace the lubricating oil filter when the replacement time comes.

[0003]

In an engine that is continuously operated for a long time, such as a service generator or an engine for a cogeneration system, the maintenance can be performed as little as possible or the engine can be operated without maintenance without stopping. Is desired. As described above, in the related art, since only one system of lubricating oil filter is used, there is a disadvantage that the engine must be stopped and maintained when the lubricating oil filter reaches the replacement time. It is desired to continuously operate for a long time without stopping the engine for replacing the lubricating oil filter.

Further, in the cold state such as when the engine is started, since the viscosity of the lubricating oil is high, there is a large resistance when passing through the lubricating oil filter, which causes a shortage of lubrication.

The present invention has been made for the purpose of providing an engine lubrication device capable of continuously operating an engine for a long time without stopping the engine for replacing a lubricating oil filter.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a plurality of lubricating oil filters arranged in a lubricating oil passage of an engine and these lubricating oil filters are selectively used. When one lubrication oil filter in use is replaced, it is switched to another lubrication oil filter, and switching means is provided to shut off the passage to the lubrication oil filter when it is time to replace it. The feature is that the lubricating oil filter, which is due to be replaced, can be replaced.

Similarly, the second invention of this application is provided with a detecting means for detecting the temperature or viscosity of the lubricating oil, and the viscosity of the engine is high when the engine is started or when the engine is in a cold state according to the detection result of the detecting means. In a lubricating oil state, a switching means is provided for switching the lubricating oil so that the lubricating oil passes through all or a plurality of the lubricating oil filters arranged.

[0008]

As described above, by selecting and using a plurality of lubricating oil filters, it is possible to operate without replacement for a long period of time, and after switching the lubricating oil filter that has reached the replacement time to another filter. The new filter can be replaced while it is in operation, and there is no need to stop operation to replace the filter.

Furthermore, when the temperature of the lubricating oil is low, such as when the engine is cold, the lubricating oil passes through a plurality or all of the lubricating oil filters, so pressure loss can be prevented even if the viscosity of the lubricating oil is high. .

[0010]

1 shows an engine lubricating oil circuit according to a first embodiment of the present invention. In the figure, (1)
Is a main body of the engine, and four lubricating oils are provided through a switching valve (3) in the middle of a lubricating oil passage (13) that is pressure-fed from an oil pan of the engine main body (1) through a lubricating oil pump (2). The oil filters (4) (4) are connected in parallel, and the lubricating oil filters (4) (4) connected in parallel are sequentially switched by the switching valve (3) to be used one by one. . Then, the lubricating oil that has passed through any one of the lubricating oil filters (4) passes through the downstream passage (1
5) through the main gallery (1) of the engine body (1)
2) sent to. (11) is each lubricating oil filter (4)
(4) is a check valve arranged in the passage on the outlet side.

FIG. 2 shows the structure of the switching valve (3). A cylindrical valve body (17) is rotatably inserted in the valve case (16). The valve body (17) communicates with an axial internal passage (18) communicating with the discharge side passage (13) of the lubricating oil pump (2), and has an outlet hole (19) on the outer periphery thereof. (19) ... are formed by changing the positions in the circumferential direction. Corresponding to these outlet holes (19) (19) ..., four outlet ports (20) (2) are provided on the side wall of the valve case (16).
0) are provided corresponding to the outlet holes (19) (19), and by rotating the valve body (17), only a pair of outlet holes (19) and outlet ports (20) corresponding to each other are provided. Are connected so that the route is changed so that the lubricating oil passes through any one of the lubricating oil filters (4) (4) ....

The rotation operation of the valve body (17) is performed by the gear (2
1) Driven by a hydraulic pump (23) via (22), and actuated to this hydraulic pump (23) via a bypass passage (14) branched from the lubricating oil passage (13). By supplying the hydraulic pressure and outputting the control output from the controller (24) to the on-off valves (6) and (7) provided before and after the hydraulic pump, only the required number of revolutions, for example, 1/4 (4 lubricating oil filters are provided). In case of), while rotating, switch the used filters (4) (4) .... In addition, the controller (24) has a limit switch (2
The fact that 1/4 rotation has been sent by 5) is sent via the signal line (26), and the on-off valves (6) (7) are controlled based on this. The replacement time of the lubricating oil filter (4) is detected by detecting the differential pressure before and after each filter (4) by the differential pressure sensor (5). For example, when the replacement time comes due to clogging of the lubricating oil filter, Since the differential pressure becomes large, it is possible to know the replacement time, and the controller (2
In 4), the valve body (17) is automatically rotated to switch the filter (4) to be used, and a warning device (27) informs that the replacement time has come.
Of course, after switching the filter (4) that has come to the replacement time to another filter (4), the passage to the filter (4) that has come to the replacement time will be blocked, so stop the engine body (1). You can replace it with a new filter without doing. FIG. 3 is a flowchart showing the flow of control in that case.

FIG. 4 shows each lubricating oil filter (4) (4)
Filters to be used by providing solenoid on-off valves (31) (31) ... at the inlets to ... and selectively opening and closing the solenoid on-off valves (31) (31). (4) is exchanged. Furthermore, in this embodiment, a lubricating oil temperature sensor (32) is provided in the discharge side passage (13) of the lubricating oil pump (2), and a detection signal from the temperature sensor (32) is used to cool the engine at the time of starting. Occasionally, all or a plurality of electromagnetic on-off valves (31) (31) ... Are opened or a plurality of electromagnetic on-off valves (31) (31) ... 4) By passing the lubricating oil through, the passage resistance at high viscosity can be reduced. Figure 5
Is a flowchart showing the flow of control in this case.

FIG. 6 shows each lubricating oil filter (4) (4)
The filters (4) (4) to be used are formed by cascade-connecting the switching valves (35) (35) at the respective branch parts and sequentially opening the switching valves (35). And the solenoid valve (36) provided on the inlet side of the filter at the time of replacement is closed to allow only one filter (4) to pass. FIG. 7 is a flowchart in that case.

FIG. 8 shows a lubricating oil supply to a supercharger (38) and a valve train (39) requiring particularly clean lubricating oil, in addition to the above-mentioned lubricating oil supply path to the main gallery. Route (4
0), and another lubricating oil filter (41) having a high filtering capacity is provided in this path (40).

[0016]

As described above, according to the present invention, a plurality of lubricating oil filters are used one by one at the time of replacement, and the lubricating oil filter at the time of replacement is Since the filter can be easily replaced without stopping the engine during use, there is an effect that the engine can be continuously operated for a long period of time without stopping the engine and performing maintenance.

Further, the lubricating oil filters thus connected in series are passed through all of the lubricating oil filters or a large number of lubricating oil filters at the time of low-viscosity starting or in a cold state to start such starting. There is an effect that a sufficient amount of lubricating oil can be secured even in cold or cold conditions.

[Brief description of drawings]

FIG. 1 is a block diagram of a lubricating oil system showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a switching valve.

FIG. 3 is a flowchart of control of the embodiment of FIG.

FIG. 4 is a block diagram of a lubricating device showing a second embodiment of the present invention.

FIG. 5 is a flow chart of control of the second embodiment.

FIG. 6 is a block diagram of a lubricating device showing a third embodiment of the present invention.

FIG. 7 is a flowchart of a third embodiment.

FIG. 8 is a block diagram of a lubricating device provided with a special lubricating oil passage to a supercharger or the like.

[Explanation of symbols]

 (1) Engine body (3) Switching valve (4) Lubricating oil filter (24) Controller (31) Electromagnetic on-off valve (32) Lubricating oil temperature sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Narita Akimoto 1-32 Chayamachi, Kita-ku, Osaka Inside Yanmar Diesel Co., Ltd.

Claims (2)

[Claims] 1. A plurality of lubricating oil filters disposed in a lubricating oil path of an engine, and one lubricating oil filter being used so as to selectively use these lubricating oil filters, another lubricating oil filter is replaced at a replacement time. In addition to switching to an oil filter, it is equipped with switching means that shuts off the passage to the lubricating oil filter when it is time to replace it, making it possible to replace the lubricating oil filter when it is time to replace it while using another lubricating oil filter. An engine lubrication device characterized by. 2. A plurality of detecting means for detecting the temperature or viscosity of the lubricating oil are provided, and in accordance with the detection result of the detecting means, the plurality of the plurality of lubricating oils are used in a highly viscous lubricating oil state such as when the engine is started or when the engine is cold. A lubricating device for an engine, comprising switching means for switching the lubricating oil to pass through all or a plurality of the lubricating oil filters arranged.