JPH0689876B2 - Torque converter oil changer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for changing oil in a torque converter (torque converter) of an automobile, which is installed in a gasoline filling station for supplying gasoline to an automobile, for example.

[Conventional technology]

In such a gasoline filling station, in addition to the gasoline filling service,
We are engaged in service work such as various oil changes and tire air filling. Among these, the applicant previously mentioned that it is a service device for automobiles that also changes torque converter oil.
We proposed the one shown in 04441 (Japanese Patent Application No. 58-211494).

This automotive service system provides services such as engine oil, torque converter oil, brake oil, gas replacement for air conditioners and coolers, tire air filling, radiator caps, air filters, and battery inspection. However, regarding the replacement of torque converter oil, insert the extraction nozzle into the oil pan of the torque converter, store the extracted oil in the vacuum tank while measuring the extraction amount with the flow meter, and then in the oil container. The new oil is filled into the oil pan while measuring with a flow meter in an amount equal to the amount taken out.

[Problems to be solved by the invention]

The oil exchanging means is a liquid contact type flow meter that measures the amount of oil taken out and a flow meter that measures the amount of new oil to be supplied to the oil pan, and measures the liquid amount by the flow of the liquid. It is a thing. Therefore, a large amount of air drawn in at the end of extraction, air mixed with new oil at the time of oil supply, and a large amount of air flowing in when the new oil container is emptied at the time of supply are also measured as the oil amount. An air countermeasure device such as a liquid sensor for detecting the inflow of air was required.

The object of the present invention is to measure the liquid only without measuring the air, so that the air countermeasure device of the above conventional example is not required, and the end of oil removal can be determined by the measuring state of the meter. It is to provide a torque converter oil changing device.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention comprises a waste oil container and a new oil container in a main body case, extracts oil for discharging old oil to the waste oil container, oil supply means for supplying new oil from the new oil container, and extraction. It is a torque converter oil exchange device that has a scale for measuring the weight of oil and a scale for measuring the weight of oil to be supplied, and performs the process of extracting oil and supplying the amount of oil based on the extracted amount multiple times. The measuring instrument is composed of a load cell,
Measuring the weight of the waste oil container when removing the waste oil When the weight change of the load cell disappears, it is judged that the draining is completed, the oil removing means is stopped, and then the oil supply means is operated to extract the waste oil from the load cell of the waste oil container. The gist of the present invention is to provide a control device including a microcomputer that supplies an oil amount based on the amount.

[Action]

According to the present invention, a meter for measuring the amount of old oil drawn from the automobile torque converter oil pan by the oil drain pipe, and a meter for measuring the amount of new oil supplied from the new oil container to the torque converter oil pan by the supply pipe. Since the device is the load cell of the weight type weighing device, high measurement accuracy can be obtained without measuring air without using an air countermeasure device. Further, it is possible to automatically determine the end of draining old oil from the torque converter oil pan in the measurement state of the load cell, that is, in the state where the weight increases.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional front view showing an embodiment of a torque converter oil changing device of the present invention. First, a case 1 is used as an oil removing means.
The waste oil container 2 was housed therein, and the other end of an oil drain pipe 7 having a nozzle 3 at the tip and a new oil sensor 4, a valve 5, and a drain pump 6 was opened in the middle of the waste oil container 2. 8 in the figure
Indicates a load cell as a weight-type weighing device for measuring the amount to be taken out, and the waste oil container 2 is placed on the load cell 8.

Similarly, as the oil supply means, a new oil container 9 is arranged in the case 1 side by side with the waste oil container 2, one end of an oil supply pipe 10 is connected to the nozzle 3, and the other end is connected to the new oil container 9. Then, a valve 1 and a supply pump 12 were provided on the way. Then, similarly to the waste oil container 2, a load cell 13 is arranged below the new oil container 9 as a gravimetric measuring device for measuring the supply amount of new oil.

In the case 1 in which the oil draining means and the oil supply means are arranged in this way, a control using a conventionally well-known microcomputer or the like is further used as control means for controlling the drive of the supply pump 12 according to the oil drainage amount. Device 14
To provide.

In the figure, 15 is an indicator for displaying the amount of oil exchange, 16 is an alarm such as a speaker for instructing the operation of the oil change work, 17 is a start switch for starting the oil change device, 18 is changing oil. Fig. 2 shows an engine drive detector that uses an additive current detector of a plug or the like for detecting the engine drive of an automobile.

As shown in the block diagram of FIG. 2, the controller 14 has an input / output device (I / O) 19, a central processing unit (CP), as is conventionally known.
U) 20, memory device (RAM) 21, memory device (ROM) 22, clock circuit 23, start switch 17, engine drive detector 18, load cells 8, 13, new oil sensor 4, valve 1
1. The output signal from the supply pump 12 is introduced into the control device 14, and the control signal from the control device 14 is introduced into the valves 5 and 11, the extraction pump 6, the supply pump 12, the indicator 15, and the alarm 16, respectively. .

Next, the method of use and operation will be described with reference to the flowchart of FIG. 3. In order to replace the oil in the torque converter of the automobile, first, the nozzle 3 is inserted into the torque gauge oil gauge hole of the automobile, and the engine drive detector 18 Set to the plug cable and start switch
Press 17 (step a).

An ON signal from the start switch 17 enters the control device 14, the control device 14 operates the extraction pump 6 to open the valve 5 (step B), and the oil extracted from the oil pan is the nozzle 3 and the oil. It enters the waste oil container 2 through the extraction pipe 7. During this period, the load cell 8 provided in the waste oil container 2 measures the amount of oil extracted, and the weight increase rate measured here becomes constant as shown at tc in FIG. 4 (step C), that is, When the nozzle 3 sucks air, the weight change disappears. Assuming that this phenomenon is completed, the extraction pump 6 is stopped and the valve 5 is closed. At this time, the extracted amount W ₁ is measured by the load cell 8 and stored in the control device 14. Further, during this withdrawal, the new oil sensor 4 detects that the oil withdrawn is not new (staple).

Next, the new oil supply pump 12 is driven to open the valve 11 (Suntepni), new oil is supplied from the new oil container 9 to the oil pan through the oil supply pipe 10 and the nozzle 3, and the supply amount during this period is Measured with the load cell 13.

In this case, the supply amount of new oil is measured accurately without being affected by air, because the change in the oil weight in the new oil container 9 is measured by the weight type measuring device and the load cell.

Further, since the withdrawal amount is also measured with the load cell, there is no measurement error even if the air is sucked, and the end of withdrawal can be easily determined.

Since both the oil drain pipe 7 and the oil supply pipe 10 are connected to the nozzle 3, only one nozzle is required and it can be smoothly inserted into a small gauge hole.

When the withdrawal amount W ₁ stored in the control device 14 and the current supply amount W ₂ become equal (step E), the control device operates to stop the supply pump 12 and close the valve 11 to end the oil supply. .

When the filling work is completed, the alarm 16 sends a message saying "Please drive the engine for 1 minute." (Step). When the engine is started according to this message, the new torque converter oil in the supplied oil pan produces torque. It goes into the converter and instead the old oil in the torque converter flows out into the oil pan. During this period, the engine drive is detected by the engine drive detector 18 (step),
When one minute, which is the time T preset in the control device 14, has elapsed (step step), a message "Stop the engine" flows from the alarm 16 (step step), and the engine is accordingly operated. Stop.

Then, when the engine stop is detected by the engine drive detector 18 (step N), the extraction pump 6 is driven again and the valve 5 is opened again (step B), and the old oil in the oil pan is discharged in the same manner as the previous time. It is withdrawn, new oil is supplied by the amount of the withdrawn oil, and the old and new oil is replaced by driving the engine (step
Nu).

By repeating such replacement work 3 to 4 times, the extracted oil will be new rather than old as before, and it will be judged as new oil by the new oil sensor 4 based on the transparency of the oil. (Steple), finally the supply pump 12 is driven and the valve 11 is opened (Step), new oil is supplied,
When the withdrawal amount W ₁ this time and the new oil supply amount W ₂ become equal (Stepwa), the alarm 16 sends a message "Exchange has been completed." Notify that the oil has been changed. Further, the replacement amount is displayed on the display unit 15.

Then, the nozzle 3 is pulled out from the gauge hole, the engine drive detector 18 is removed from the plug cable, and the oil exchange work is completed.

In the replacement work described above, the nozzle 3 is first inserted into the gauge hole of the automobile, the start switch 17 is pressed, and thereafter, the driving of the engine is stopped according to the message from the alarm 16 at the driver's seat, and the engine is automatically stopped. You can change the torque converter oil.

The load cell 8 for waste oil and the load cell 13 for new oil may be shared by one load cell.

〔The invention's effect〕

As described above, the torque converter oil changing device of the present invention is
Since the weight type load cell is used for the measuring device, even if the air is sucked during the oil change, the air is not measured so that the measurement error due to the air does not occur. Further, it is possible to easily judge the end of the sampling.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a torque converter oil changing device of the present invention, FIG. 2 is a block diagram of the same as above, FIG. 3 is a flow chart showing the operation, and FIG. 4 is a characteristic curve diagram showing a weight increase rate. is there. 1 ... Case, 2 ... Waste oil container 3 ... Nozzle, 4 ... New oil sensor 5 ... Valve, 6 ... Extraction pump 7 ... Oil extraction pipe, 8 ... Load cell 9 ... New oil container, 10 …… Oil supply pipe 11 …… Valve, 12 …… Supply pump 13 …… Load cell, 14 …… Control device 15 …… Indicator, 16 …… Alarm 17 …… Start switch, 18 …… Engine drive detector 19 ...... Input / output device (I / O), 20 ...... Central processing unit (CPU) 21 …… Storage device (RAM), 22 …… Storage device (ROM) 23 …… Clock circuit

Claims (1)

[Claims] 1. A main body case comprising a waste oil container and a new oil container, and means for extracting old oil and sending it to the waste oil container, oil supply means for supplying new oil from the new oil container, and measuring the weight of the extracted oil. A torque converter oil exchange device that has a weighing device for measuring the weight of the oil to be supplied, and that performs a plurality of steps of extracting the oil and supplying the amount of oil based on the amount of oil withdrawn, Is a load cell, and measures the weight of the waste oil container when draining the waste oil.When there is no change in the weight of the load cell, it judges the end of draining, stops the oil draining means, then activates the oil supply means, Is provided with a control device including a microcomputer for supplying an oil amount based on the extraction amount obtained from the load cell of Torque converter oil exchange equipment.