JPH09240791A - Method for exchanging oil and its apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid to mix an oil used at the preceding exchange of oil with a different kind of oil to be used at the next exchange of oil even when only one new oil feeding system is used. SOLUTION: Passages pulled out from a plurality of new oil containers 11-13 storing a plurality of new oils A, B and C are respectively opened and closed by means of a plurality of new oil valves 16-18. A suction/discharge reversible type new oil pump 24 is provided on a new oil feeding passage 21 and 26 being integrated into one through these new oil valves 16-18. When the new oil pump 24 is reversely rotated, the outlet side is communicated with a waste oil container 27 through a waste oil returning passage 28. A nozzle 32 for suction and injection of oil is connected with the apex of the new oil feeding passages 21 and 26. The new oil feeding passages 21 and 26 and the waste oil discharging passages 34 and 36 are communicated with each other through the upper part 32a of the nozzle 32. A waste oil pump 41 is provided in the waste oil discharging passages 34 and 36. The passage from the waste oil pump 41 to the waste oil container 27 is opened and closed by means of a waste oil valve 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil changing method and apparatus suitable for changing oils of different types using the same oil changing means.

[0002]

2. Description of the Related Art As disclosed in Japanese Unexamined Patent Publication No. 6-278799, an oil exchanger for replacing old engine oil of a vehicle or oil for an automatic transmission (hereinafter, simply referred to as oil) with a new one is used. , A waste oil nozzle for discharging old oil from a vehicle oil replacement target portion (hereinafter, simply referred to as a target portion), a waste oil pump and a waste oil container, and a plurality of new oil containers for supplying new oil to the target portion, One fresh oil pump, a plurality of fresh oil supply passages and a refueling nozzle are provided.

A plurality of new oil supply passages are provided because, in one new oil supply passage, if the type of oil is different between the previous oil exchange and the next oil exchange, the new oil is supplied by the previous oil exchange. This is because the different type of oil remaining in the supply passage mixes into the target section at the next oil change.

[0004]

Therefore, in the conventional oil exchanger, it is necessary to provide a plurality of sets of pipes, hoses, and check valves for the new oil supply passage inside and outside the machine body. Furthermore, when the number of new oil containers increases, the pipes, hoses and check valves for the new oil supply passages must be increased accordingly.

Further, since one new oil pump is commonly used for different kinds of oil, a considerable amount of oil used in the previous oil exchange remains in this new oil pump and in the pipes around the pump. Therefore, there is a problem that this oil mixes with different oils in the next oil change.

The present invention has been made in view of the above circumstances, and even in one new oil supply system, the oil used in the previous oil exchange does not mix with the different oil used in the next oil exchange. It is an object to provide a method and an apparatus thereof.

[0007]

The invention described in claim 1 is implemented by a waste oil discharge system for discharging waste oil from an oil exchange target section and a new oil supply system for supplying new oil to the oil exchange target section. In the oil exchange method that applies different oils to different oils, one new oil remaining in the new oil supply system in the previous oil exchange is collected within a range less than the total residual amount, and the next oil exchange is performed. The new oil supply system is filled with other new oil to remove one new oil remaining in the new oil supply system, and then the waste oil discharge system is closed to change the oil from the new oil supply system. This is an oil exchange method that supplies other new oil to the target part.

When a large amount of one new oil used in the previous oil change remains in the new oil supply system, the residual new oil is collected as much as possible, but not all of the remaining residual new oil. Will be removed from the new oil supply system to the waste oil discharge system by another new oil at the next oil change.

According to the second aspect of the present invention, oil exchange is performed by a waste oil discharge system that discharges waste oil from the oil exchange target part and a new oil supply system that supplies new oil to the oil exchange target part. In the oil exchange method applied to, the waste oil in the oil exchange target part is discharged to the waste oil container via the new oil supply system, so that the one new oil remaining in the new oil supply system in the previous oil exchange is washed away. This is an oil exchange method in which another new oil of the same type as the waste oil is supplied from the new oil supply system to the oil exchange target part.

When the new oil used in the previous oil change adheres to the inner wall of the pipeline of the new oil supply system, the new oil supply system is washed with the waste oil of the oil exchange target part and eliminated in the waste oil container. To do.

According to the third aspect of the present invention, a plurality of new oil valves for respectively opening and closing passages drawn from a plurality of new oil containers for storing a plurality of kinds of new oil, and through these new oil valves are provided. Reversible intake and exhaust type new oil pump provided in a single new oil supply passage, waste oil return passage connecting the discharge side of this new oil pump to the waste oil container at the time of reverse rotation, and connection to the tip of the new oil supply passage Nozzle for oil suction and injection, a waste oil discharge passage communicating with the new oil supply passage through the upper part of this nozzle, a waste oil pump provided in this waste oil discharge passage, and a passage from this waste oil pump to a waste oil container It is an oil exchanging device having a waste oil valve for opening and closing.

If a large amount of the one new oil used in the previous oil change remains in the new oil supply passage, the remaining one new oil is less than the total remaining amount due to the reverse rotation of the new oil pump. Correspond within the range of quantity Collect as much as possible in the new oil container, but not all, and in the next oil change, other new oil selected from multiple new oil containers by the new oil valve is forwarded by the new oil pump. By filling the new oil supply passage with one new oil remaining in the new oil supply passage through the upper part of the nozzle to the waste oil discharge passage, the waste oil valve closes the waste oil discharge passage to close the new oil supply passage. Other new oil is supplied to the oil exchange target part through the nozzle.

Further, when the new oil used in the previous oil change adheres to the inner wall of the pipeline of the new oil supply passage, the new oil pump should be operated with all new oil valves and waste oil valves closed. By reversing and discharging the waste oil of the oil exchange target part through the nozzle, the new oil supply passage and the waste oil return passage to the waste oil container, one new oil adhering to the inside of the new oil supply passage is After cleaning with waste oil and discarding it in the waste oil container, other new oil (new oil of the same type as the waste oil) selected from new oil valves from multiple new oil containers by the next oil change is updated by forward rotation of the new oil pump. The oil is supplied from the oil supply passage through the nozzle to the oil exchange target part.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

Inside the apparatus body 10, a plurality of types of new oil A,
A plurality of new oil containers 11, 12 and 13 for accommodating B and C are installed. The new oils A and B are engine oils of different types, and the new oil C is oil for automatic transmission (ATF oil).

New oil valves 16, 17, and 18 are connected to the pipes 14 drawn out from these new oil containers 11, 12, and 13 via pipe joints 15, respectively. These new oil valves 16, 17, 18 are solenoid valves for opening and closing the piping passages. When the solenoid is energized, the switching passages are connected by a solenoid to connect the piping passages. To do.

A filter 22, a flow meter 23, and a new oil pump 24 are provided in a new oil pipe 21 for supplying new oil which is integrated through the new oil valves 16, 17, and 18. The new oil pump 24 is a reversible suction-discharge pump that can reverse the suction side and the discharge side by reversing the rotation direction.

A new oil hose 26 for supplying new oil is connected to a new oil pipe 21 in the apparatus body 10 via a pipe joint 25, and is drawn out of the apparatus body 10.

A new oil supply passage is formed by the new oil pipe 21 inside the apparatus body 10 and the new oil hose 26 outside the apparatus body 10.

By pulling out a pipe 28 as a waste oil return passage communicating with the waste oil container 27 from the new oil pipe 21 on the discharge side when the new oil pump 24 is rotated in the reverse direction, and providing a check valve 29 in this pipe 28, The suction of waste oil from the waste oil container 27 to the new oil pump 24 at the time of normal rotation of the new oil pump is prevented. D is waste oil.

A nozzle 32 for oil suction injection is connected to the tip of the new oil hose 26 via a pipe joint 31. The nozzle 32 is inserted through an oil level gauge hole of an automobile into an oil pan (oil sump) as an oil exchange target portion to suck out waste oil and inject new oil.

Through the upper portion 32a of the nozzle 32, the pipe joint
By providing a pipe joint 33 communicating with 31 and connecting a waste oil hose 34 for discharging waste oil with this pipe joint 33, the new oil hose 26 and the waste oil hose 34 are communicated. A waste oil pipe 36 for discharging waste oil is connected to the waste oil hose 34 by a pipe joint 35.

The waste oil hose 34 drawn out of the apparatus body 10 and the waste oil pipe 36 in the apparatus body 10 form a waste oil discharge passage.

A waste oil pump 41 and a filter are provided in the waste oil pipe 36.
42 and a flow meter 43 are provided, and a pipe joint 45 is further provided via a waste oil valve 44, and the pipe joint 45 connects a pipe 46 inserted into the waste oil container 27. The waste oil valve 44 is a solenoid valve that opens and closes a pipe passage from the waste oil pump 41 to the waste oil container 27.

Since the flow meters 23 and 43 provided in the new oil pipe 21 and the waste oil pipe 36, respectively, can detect the flow rate of the oil that has passed and can electrically take out the signal,
The total amount of oil that has passed can be measured by an integration process in a controller (not shown).

Next, referring to FIG. 1, a method for automatically changing a new oil A of a certain engine oil and then a new oil B of a different engine oil using the same device will be described. explain.

When a large amount of the new oil A used in the previous oil change remains in the new oil pipe 21 and the new oil hose 26, the new oil valve 16 is installed as shown in FIG. 1 (A). By reversing the open new oil pump 24, the remaining new oil A
Is recovered in the original new oil container 11 as much as possible within a range of less than the total residual amount.

As described above, since the total amount remaining in the new oil supply passage is not collected, even if the tip of the nozzle 32 is inserted into the oil pan (oil sump) of another automobile, the oil pan will not be recovered. It is possible to prevent the waste oil from being mixed in the new oil container 11.

Then, although not shown, the new oil valve 16 is closed, the new oil pump 24 is stopped, the waste oil valve 44 is opened, and the waste oil pump 41 is driven to move the nozzle 32 from the oil pan of the automobile to be oil-exchanged. The waste oil thus sucked is discharged to the waste oil container 27 through the waste oil hose 34 and the waste oil pipe 36.

Further, as shown in FIG. 1 (B), the new oil valve 17 is opened to drive the new oil pump 24 in the normal direction, and the waste oil valve 44 is also opened to drive the waste oil pump 41 in the normal direction so that the new oil is discharged. Container 12
From the new oil pipe 21 and the new oil hose 26 to a little more than their internal volume, and the new oil pipe 21 and the new oil hose 26 are filled with the new oil B, these new oil supply passages A small amount of the new oil A, which was previously oil-changed, is extruded into the waste oil hose 34 and the waste oil pipe 36 through the upper portion 32a of the nozzle 32, and is removed into the waste oil container 27.

As described above, the new oil A is not mixed with the new oil B because the new oil A is recovered as the waste oil by the operation of the waste oil pump 41 operating simultaneously with the new oil pump 24.

Thereafter, when the waste oil valve 44 is closed and the waste oil pump 41 is stopped while maintaining the state in which the new oil valve 17 is opened and the new oil pump 24 is normally driven, the new oil B in the new oil container 12 becomes It is supplied from a new oil pipe 21 and a new oil hose 26 through a nozzle 32 into the oil pan. In this way, even if the oil of each oil type is changed with one new oil hose 26, the oil types do not mix.

Next, referring to FIG. 2, after the oil is replaced with the new oil A or B of the engine oil, the same device is used to make an automatic transmission oil (hereinafter referred to as ATF).
A description will be given of an automatic exchange method in the case of performing oil exchange with new oil C (referred to as oil).

If the new oil A or B used in the previous oil change adheres to the inner wall of the new oil pipe 21 and the new oil hose 26 or is left behind to some extent, the new oil A is first used.
Alternatively, B is washed with ATF oil (waste oil) in the oil pan of the automobile in which the oil is to be changed. The waste oil of this ATF oil is in a relatively clean state even if it deteriorates.

Therefore, the engine of the automobile is idling to discharge the waste oil of the ATF oil to be replaced from the automatic transmission of the automobile to the oil pan, and as shown in FIG. The pump 24 is reversely driven to suck the waste oil of the ATF oil into the new oil hose 26 from the nozzle 32 inserted in the oil pan.

At this time, since the new oil pump 24 is rotated in the reverse direction with all the new oil valves 16, 17, 18 and the waste oil valve 44 closed, the waste oil of the ATF oil is discharged from the nozzle 32 to the new oil hose.
26, the new oil pipe 21 and the waste oil return passage 28, and the check valve 29 in the waste oil return passage 28 to discharge the waste oil to the waste oil container 27.

In this way, the waste oil is passed through the fresh oil hose 26 etc. as the flushing liquid only for the first time, and the fresh oil A or B adhering in the pipeline of the fresh oil hose 26 etc. is ATF.
The oil is washed with waste oil, and the waste oil container 27 is removed.

Further, as shown in FIG. 2B, when the new oil C of ATF oil is supplied into the oil pan,
With the waste oil pump 41 stopped and the waste oil valve 44 closed, the new oil valve 18 is opened and the new oil pump 24 is driven in the normal direction, whereby the new oil C in the new oil container 13 is transferred to the new oil pipe 21 and the new oil pipe 21. The oil is supplied from the nozzle 32 into the oil pan through the oil hose 26.

When the ATF oil is continuously exchanged, the new oil valve 18 is closed, the new oil pump 24 is stopped, and the waste oil valve 44 is opened to drive the waste oil pump 41 for the next waste oil discharge. By AT in the car oil pan
The waste oil of F oil is discharged from the nozzle 32 to the waste oil tank 27 through the waste oil hose 34 and the waste oil pipe 36.

The above operation is automatically controlled by a control device (not shown) incorporated in the oil changer.

[0041]

According to the invention described in claim 1, when a large amount of one new oil used in the previous oil exchange remains in the new oil supply system, the residual new oil is recovered as much as possible. The remaining residual new oil is removed from the new oil supply system to the waste oil discharge system by another new oil at the time of the next oil change, so even if only one new oil supply system is used, It is possible to prevent the used oil from mixing with the different oil used in the next oil change.

According to the second aspect of the present invention, when the waste oil of the oil exchange target portion is relatively clean like the oil for the automatic transmission, the waste oil of the oil exchange target portion of the new oil supply system is used. Since the foreign oil adhering to the inner wall of the pipeline is washed and removed to the waste oil container, the oil used in the previous oil exchange does not mix with the foreign oil used in the next oil exchange even with one new oil supply system. You can

According to the third aspect of the invention, a new oil pump, a waste oil pump, a new oil valve and a waste oil valve of reversible intake and exhaust type are used to recover the new oil used in the previous oil exchange, and an oil suction injection nozzle. By removing the waste oil to the waste oil discharge passage that communicates with the new oil supply passage via the upper part of the The oil can be changed so that it does not mix with the different oil used in the next oil change. Further, since this device uses one new oil supply passage, it can cope with an increase in the number of new oil containers, and even if the oil remaining inside the new oil pump is mixed with different types of oil. Can solve problems.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of an oil exchanging device according to the present invention, where (A) is a circuit diagram when recovering new oil of engine oil A that has remained after previous oil exchange,
[Fig. 4] is a circuit diagram when residual engine oil A is removed by a new oil of different engine oil B.

FIG. 2 is a circuit diagram showing another embodiment of the oil exchanging device of the above, FIG. 2A is a circuit diagram when cleaning a new oil supply system with waste oil of automatic transmission oil, and FIG. It is a circuit diagram when supplying new oil of machine oil.

[Explanation of symbols] A, B, C New oil 11, 12, 13 New oil container 16, 17, 18 New oil valve 21, 26 New oil supply passage 24 New oil pump 27 Waste oil container 28 Waste oil return passage 32 Nozzle 34, 36 Waste oil discharge passage 41 Waste oil pump 44 Waste oil valve

Claims (3)

[Claims] 1. An oil exchange method in which an oil exchange is performed between a different oil by a waste oil discharge system that discharges waste oil from an oil exchange target part and a new oil supply system that supplies new oil to the oil exchange target part, By recovering one new oil remaining in the new oil supply system in the previous oil change within a range less than the total residual amount, and filling the new oil supply system with another new oil in the next oil change. One feature is that after removing one new oil remaining in the new oil supply system to the waste oil discharge system, the waste oil discharge system is closed to supply other new oil from the new oil supply system to the oil exchange target part. How to change the oil. 2. An oil exchange method for applying different oils to a different oil by a waste oil discharge system for discharging waste oil from an oil exchange target part and a new oil supply system for supplying new oil to the oil exchange target part, By discharging the waste oil of the oil exchange target part to the waste oil container via the new oil supply system, the one new oil remaining in the new oil supply system by the previous oil exchange is washed away and the other new oil of the same type as the waste oil is removed. An oil exchange method characterized in that oil is supplied from a new oil supply system to an oil exchange target part. 3. A plurality of new oil valves for respectively opening and closing passages drawn from a plurality of new oil containers accommodating a plurality of kinds of new oil, and a new oil supply integrated through each of these new oil valves. A new oil pump of a reversible intake and exhaust type installed in the passage, a waste oil return passage that connects the discharge side of the new oil pump to the waste oil container at the time of reverse rotation, and a nozzle for oil suction injection connected to the tip of the new oil supply passage A waste oil discharge passage communicating with the new oil supply passage through the upper portion of the nozzle; a waste oil pump provided in the waste oil discharge passage; and a waste oil valve for opening and closing the passage from the waste oil pump to the waste oil container. An oil changer characterized in that