JPS603295Y2 - Automatic oil change device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic oil changing device for a diesel engine.

Diesel engines contain more particulates (vehicles, etc.) in their exhaust compared to gasoline engines, and in particular use EGR (a system that recirculates part of the exhaust gas into the intake air to suppress the maximum combustion temperature) to reduce NOx. When this is done, the generation of particulates tends to increase significantly.

Particulates in the EGR gas sucked into the cylinder along with this fresh air tend to adhere to the oil-lubricated inner wall of the cylinder, and the particulates scraped off by the piston rings are a major cause of accelerated engine oil deterioration. It had become.

Deterioration of engine oil causes wear in each moving part of the engine and reduces engine performance, which increases the need for early replacement of the oil with new oil.

In order to eliminate the trouble of changing oil and always supply oil with high lubrication performance, the applicant has proposed an automatic oil change system as shown in Figure 1 (Reference: Japanese Patent Application Laid-Open No. No. 50-73303, Japanese Patent Publication No. 1973
Publication No. 2-9883).

To explain this, the oil pan 2 of the engine 1 is filled with engine oil from the oil tank 3 filled with new oil.
It is supplied via an oil feed pipe 4 and a solenoid valve 5.

The solenoid valve 5 opens and closes in conjunction with the float valve 2b provided in the oil pan 2 to supply a predetermined amount of oil to the oil pan 2, and its opening and closing switching is controlled as follows.

That is, as seen in FIG. 1a, which is an enlarged view of the float valve 2b, the float valve 2b is connected to the opening 4 of the oil pipe 4.
A lever 2 that rotates around a fulcrum 2bc provided near a.
bd.

A float 2bb provided at one end of the lever 2bd.

It consists of a valve body 2ba that moves up and down with the float 2bb to open and close an opening 4a, and a limit switch 2be that opens and closes in conjunction with the movement of the other end of the lever 2bd. When the oil level decreases, the float 2bb rotates and descends around the fulcrum 2bC, and at the same time the valve body 2ha also descends to open the valve, and in conjunction with the other end of the lever 2bd, the limit switch 2b is opened.
e is closed and the solenoid valve 5 is energized to open it.

In other words, the float valve 2b opens and closes in accordance with the increase and decrease in the amount of oil in the oil pan 2, and the solenoid valve 5 also opens and closes synchronously.
The oil pan 2 is always filled with a predetermined amount of oil.

On the other hand, a part of the old oil is drained from the hydraulic system (hydraulic passage) of the engine 1 via an oil drain pipe 7 in which a solenoid valve 8 is interposed based on the engine oil pressure.

The switching operation of the electromagnetic valve 8 is automatically controlled in conjunction with an odometer switch and a timer (not shown).

In other words, every time the vehicle travels a certain distance, for example 100 meters, the odometer switch is activated and the timer is reset. Each time the timer is reset, the timer is turned on for a certain period of time, opens the solenoid valve 8, and drains old oil from the hydraulic system. That's why.

As already mentioned, the amount of oil reduced by the amount extracted or the amount of oil consumed by combustion etc. is compensated with new oil in the oil tank 3.

By continuing to supply new oil and drain old oil in this way, the interior of the oil pan 2 is always filled with undegraded oil that can exhibit the specified lubrication performance. This device also sends the extracted oil to the fuel tank 11.

In other words, the removed oil is burned together with fuel in the combustion chamber to simplify its treatment, but in this case, the oil drain pipe 7 joins the return pipe 13 from the injection pump 12, and the old oil is removed. It is fed together with the returned fuel to the fuel tank 11, and the fuel mixed with oil is fed back to the injection pump 12 via a feed pipe 16 interposed with a fuel-water separator 14 and a filter 15.

However, there was one problem with this device.

In other words, different types of engine oil are used depending on the conditions of use. For example, in cold regions, if you do not use an oil with a relatively lower viscosity than in warm regions, starting performance may be poor or it may take a long time to warm up. This can have the disadvantage of taking time or not producing the necessary output, so the product number or grade of oil that provides the best performance is specified depending on the environment in which the vehicle is driven.

In other words, even if the vehicle is the same, if the environment in the area in which it is driven changes, it is necessary to replace the oil with the most suitable oil for that environment.In such cases, the automatic oil change device described above The only way to drain the oil from the oil tank 3 is to drain it together with the oil that has accumulated in the oil pan 2. As a result, the old oil and new oil will mix, making it impossible to reuse the drained oil. Alternatively, since the engine oil injection port is located in two locations: the oil injection port for the engine 1 (not shown, but usually provided on the rocker cover) and the oil injection port for the oil tank 3, it takes time and effort to inject oil separately. There was a drawback.

Therefore, an object of the present invention is to provide an automatic oil exchange device that eliminates the above-mentioned drawbacks by arranging the oil tank oil filler port and the engine oil filler port coaxially and providing a drain pipe in the oil tank. do.

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 2 is a schematic configuration diagram showing the first embodiment of the present invention, 1a
is a rocker cover, 1b is a cylinder head, and 1c is a cylinder block.

An oil tank 3' provided on the side surface of the cylinder block IC communicates with the oil supply passage 28.

The oil supply passage 28 communicates with an oil supply pipe 28a1 protruding from the upper surface of the cylinder head 1b, and a passage 28b1 passing through the cylinder head 1b, and is connected to the cylinder block IC opening on the side surface of the cylinder block IC. The passage 2801 is formed by an oil supply pipe 28d that communicates the opening of the passage 28c and the oil tank 3.

The upper open end (oil filler port) 28aa of the oil supply pipe 28a opens inside the oil filler port 1aa formed in the rocker cover 10,
Oil filler ports 1aa are installed at appropriate intervals around the opening end 28aa.
is arranged so that it is open.

The open end 28aa is closed and fixed at the same time when the oil filler cap 29 screwed into the oil filler port 1aa is tightened.

On the other hand, the oil feed pipe 4' selectively communicates with either a float valve 2b' or a drain pipe 4'a provided in the oil tank 3' and oil pan 2 to regulate the amount of oil via a three-way solenoid valve 5'. .

When the ignition switch 17 is turned on and the three-way solenoid valve 5' is energized, the three-way solenoid valve 5' connects the oil tank 3' and the float valve 2b'.
When the current is cut off at the same <0FFL, the oil tank 3' and the drain pipe 4'a are switched and driven to communicate with each other.

Note that 2c is a drain plug of the oil pan 2, and 4'b is a drain cock of the drain pipe 4'a.

With the above configuration, when changing the entire oil, first turn off the ignition switch 17, then the oil tank 3' and the drain pipe 4'a will communicate with each other, so by opening the drain cock 4'b, the oil tank 3' Can drain new unused oil.

The oil accumulated in the oil pan 2 is drained by removing the drain plug 2c.

In this way, the oil in oil pan 2 and the oil in oil tank 3 are
’ After separating and draining the oil, drain the drain plug 2.
By tightening c and closing drain cock 4'b, pour the desired new oil from oil filler port 1aa and the same <28aa, oil can be supplied to oil pan 2 and oil tank 3' at the same time. (Normally, oil poured into the rocker cover 1a is collected in the oil pan 2 via a passage (not shown)).

Furthermore, when the oil tank 3' is filled with the injected oil, the oil that fills the oil supply passage 28 and overflows flows into the rocker cover 1a through the oil filler port laa.

Since it flows into the side and eventually pours into oil pan 2, if you measure the amount of oil to be injected, it will be the same as oil filler port laa.
Injection of the specified amount of oil can be completed without replenishing separately from 28aa and 28aa.

Instead, a second embodiment of the present invention is shown in FIG.

I will explain about it.

In this embodiment, the oil tank 3'' is connected to the cylinder block 1.
d, and passages 28d, 28b1 oil supply pipe 28
The oil supply port 26aa and the oil tank 3'' are communicated through the oil supply passage 28 consisting of the oil supply passage 28 and the oil supply passage 4, which connects the oil tank 3' and the float valve 2b' with a solenoid valve 5''. A drain pipe 4"a communicates with the oil tank 3' through the oil supply passage 4" and independently communicates with the oil tank 3'.
This is an example where .

In this case, the solenoid valve 5'' turns the ignition switch 17 to
When the valve is turned N, the valve is opened and the oil tank 3# and the oil pan 2 (float valve 2b') are communicated with each other.

According to this embodiment, the ignition switch 17 is
Even in the N state, that is, even when the engine is running, the oil in the oil tank 3'' can be individually drained by opening the drain cock 4''b.

In the above two embodiments, it goes without saying that the three-way solenoid valve 5' (FIG. 2) or the solenoid valve 5'' (FIG. 3) may be a manual switching valve.

As explained above, according to the present invention, a passage for pouring new oil into the oil tank is provided, the oil filler port of the passage is arranged coaxially with the oil filler port of the engine, and the oil in the oil tank is separated. A drain pipe is provided to drain the used oil that has accumulated in the oil pan and new oil from the oil tank.In addition, new oil can be injected into the engine and oil tank at the same time. Therefore, it is possible to easily and quickly change the oil to one that is suitable for the environment where the vehicle is used.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a normal automatic oil exchange system.
FIGS. 2 and 3 are schematic diagrams of the first and second embodiments of the present invention, respectively. 1...Engine, 1a...Rocker cover, 1b...Cylinder head, 1c, 1d...
...Cylinder block, 2...Oil pan, 2b, 2b'...Float valve, 2c...
・・Drain plug, 3, 3', 3'-・・・・Oil tank, 4. 4'...Oil pipe, 4''...
...Oil feed passage, 5,5z...Solenoid valve, 5'...
...Three-way solenoid valve, 17...Ignition switch, -18...Power supply, 28...Oil supply passage, 28aa...Oil filler port (oil tank)
, laa... Oil filler port (engine), 29...
...Oil filler cap.

Claims (1)

[Scope of utility model registration request] A means for draining a portion of the oil from the hydraulic system of the engine, a means for mixing the drained oil into the supplied fuel, and a means for replenishing the engine oil pan with new oil in the oil tank in an amount corresponding to the amount of the drained oil. In an automatic oil exchange device, a passage for pouring new oil into an oil tank is provided, and an oil filler port of the passage is arranged coaxially with an oil filler port provided in an engine rocker cover at an appropriate interval in the circumferential direction. The automatic oil change device is characterized in that it is also provided with a drain pipe that communicates with the oil tank and drains new oil.