JPH0727206A - Oil regulator for automatic transmission - Google Patents

Abstract

PURPOSE:To provide an oil regulator for an automatic transmission, capable of shortening a regulating operation time and enhancing accuracy of regulation. CONSTITUTION:An oil regulator comprises an oil passing tube 1 to be inserted vertically into an automatic transmission A, a level detecting magnet 2 contained inside the oil passing tube 1 in such a manner as to be vertically moved and capable of floating in oil Q, an anode terminal 3 and a cathode terminal 4 as electrodes for supplying a current to the oil passing tube 1 in a pulse state, a vibration detector 5 for detecting vibration of the oil passing tube 1, an oil supplier 6 for injecting and sucking oil through the oil passing tube 1, and a controller 7 for calculating the position of the level detecting magnet 2 on the basis of a time from the electrification by the electrodes to detection of vibration by the vibration detector 5 and determining an oil regulating quantity so as to instruct operation of oil injection and suction to the oil supplier 6 according to the regulating quantity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil adjusting device used for adjusting the amount of oil (hydraulic oil) of an automatic transmission in an automobile.

[0002]

2. Description of the Related Art The oil of an automatic transmission must be accurately adjusted to a predetermined amount in order to maintain the performance of the automatic transmission. Therefore, in adjusting the amount of oil, after checking the temperature rise of the oil while the vehicle is in a running state, the position of the oil surface is measured through the charging pipe C of the automatic transmission A shown in FIG. Depending on the situation, inject or suck oil. Inspecting the automatic transmission for shipment is as follows: Automobile Engineering Complete Book Vol.18, Automobile Manufacturing Management (Published on December 25, 1980, Sankaidou) Nos. 178-18
It is introduced in “Item 5.4.5 Inspection” on page 3.

As an oil adjusting device for a conventional automatic transmission, an injection / suction pipe P as shown in FIG. 5 has been used. The injection / suction pipe P has a double structure composed of an outer pipe 101 having a base end portion (not shown) connected to an air supply source and an inner pipe 102 having the base end portion connected to an oil supply source. Insert the tip into the charging pipe C and set it so that the tip is located at the prescribed oil level.

After that, air is sent from the outer tube 101, and the air pressure is measured at the base end portion side (not shown). At this time, as shown in FIG. 5A, when the tip of the injection / suction pipe P is in the oil Q (when the amount of oil is large), the air pressure rises in a short time. From this, it can be seen that the amount of oil Q is large. Also, FIG.
As shown in (b), when the tip portion of the injection / suction pipe P is separated from the oil surface, the increase in the air pressure is delayed, so that it can be seen that the amount of the oil Q is small.

When the amount of the oil Q is large, the inner pipe 102 sucks the oil Q as shown in FIG. 5 (c). As the oil Q is sucked, as shown in FIG. 5 (d), the oil is not sucked when the oil level has dropped to the tip of the injection / suction pipe P, whereby a prescribed amount of oil Q remains. It will be.

When the amount of oil Q is small, the oil Q flows from the inner pipe 102 as shown by the arrow in FIG. 5 (b).
Was injected, air was supplied again from the outer pipe 101, the pressure was measured, and after confirming that the oil Q became larger than the specified amount, suction was performed in the same manner as described above to obtain the specified amount of oil Q. To leave.

[0007]

However, in the conventional oil adjusting device as described above, the diameter of the charging pipe C of the general automatic transmission A is about 20 mm, while the diameter of the charging pipe C is 2 mm. Since the heavy structure injection / suction pipe P was used, the oil flow rate per unit time was limited to a small amount, and the adjustment work took time accordingly, and the oil level shook due to the stirring of the oil by the torque converter. Therefore, there is a problem that it is difficult to adjust accurately, and it has been a problem to solve these problems.

[0008]

It is an object of the present invention to provide an oil adjusting device for an automatic transmission, which has been made in view of the above-mentioned conventional problems and which can shorten the adjusting work time and improve the adjusting accuracy. It is an object.

[0009]

According to a first aspect of the present invention, there is provided an oil adjusting device for an automatic transmission, wherein an oil distribution pipe vertically inserted into the automatic transmission and a vertically movable inside the oil distribution pipe. A level detection magnet that is housed and floats in oil, and an electrode that supplies a pulsed current to the oil flow pipe,
Based on the vibration detector that detects the vibration of the oil flow pipe, the oil supply device that injects and sucks oil through the oil flow pipe, and the time from when the electrodes energize until the vibration is detected by the vibration detector. A configuration is provided that includes a controller that calculates the position of the level detecting magnet in the oil flow pipe, determines the adjustment amount of oil, and commands the oil supply device to inject and suck oil according to the adjustment amount. According to claim 2, in the oil adjusting device for the automatic transmission according to claim 1, an oil temperature sensor is provided in the oil flow pipe, and the controller adjusts the oil amount based on the measured value of the oil temperature sensor. Are corrected, and these configurations are used as means for solving the conventional problems.

[0010]

In the oil adjusting device for the automatic transmission according to the first aspect of the present invention, when the oil flow pipe is inserted to a predetermined position in the automatic transmission and the lower end side is immersed in the oil, the oil flow pipe is The level detection magnet housed in is floated on the oil surface. In this state, when a pulsed current is applied to the oil flow pipe by the electrodes, electromagnetic force (Lorentz force) is generated intermittently at the position of the level detection magnet in response to the pulse, which causes vibration in the oil flow pipe. Occurs.

Therefore, in the above oil adjusting device, the controller calculates the position of the level detecting magnet in the oil flow pipe based on the time from the energization until the vibration is detected by the vibration detector, and The amount of oil is grasped and the amount of adjustment for this is determined, and an oil injection or suction operation is commanded to the oil supply device according to the amount of adjustment. As described above, in the above oil adjusting device, by using the level detecting magnet housed in the oil flow pipe, the position of the oil surface is detected without being affected by the fluctuation of the oil surface, and a single pipe is used. Oil is injected or sucked through a certain oil flow pipe.

Further, in the oil adjusting device for the automatic transmission according to the second aspect of the present invention, in consideration of the fact that the viscosity of the oil changes with the temperature, the oil temperature sensor provided in the oil flow pipe in the controller is taken into consideration. Determine more accurate adjustment amount by correcting the adjustment amount of oil based on the measured value of
Oil injection or suction is performed according to the adjustment amount.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

That is, the oil adjusting device includes an oil flow pipe 1 vertically inserted into an automatic transmission A schematically shown in FIG. 1, and an oil flow pipe 1 which is vertically movably housed in the oil flow pipe 1. A magnet 2 for detecting a level floating in the air, an anode terminal 3 and a cathode terminal 4 which are electrodes for supplying a current in a pulsed manner to the oil flow pipe 1, a vibration detector 5 for detecting the vibration of the oil flow pipe 1, and an oil flow pipe 1, an oil supply device 6 for injecting and sucking the oil Q and a controller 7 for determining an adjustment amount of the oil Q are provided.

The oil flow pipe 1 is closed at the upper and lower ends, has two flow ports 8 and 9 at positions near the upper and lower ends, and has an upper flow port 8 at the upper end. A hollow connecting member 10 is attached so as to communicate with the inside. The level detecting magnet 2 has a circular shape having a diameter smaller than the inner diameter of the oil flow pipe 1, and when floated on the oil Q, the center of the thickness thereof is in a state of being aligned with the oil surface.

The anode terminal 3 is located below the connecting member 10 and is directly connected to the oil flow pipe 1. The cathode terminal 4 is also located below the connecting member 10 and is connected to the conductive member 11 led from the lower end of the oil flow pipe 1. The vibration detector 5 is attached to a position slightly below the anode terminal 3. An oil temperature sensor 12 for detecting the temperature of the oil Q is attached to the lower end of the oil flow pipe 1.

The oil supplier 6 includes an oil tank 13 and
A pipe 14 for oil circulation is provided. This piping 14
Has one end communicating with the connecting member 10,
The other end side is branched into two, and on the other end side, a return pipe 14a that opens on the upper side in the oil tank 13 and a feed pipe 14b that opens near the bottom of the oil tank 13 are provided. A switching door 16 for alternately opening and closing the switching actuator 15 as a drive source is provided at a branch position between the return pipe 14a and the feed pipe 14b, and an oil tank 13 is provided for injecting and sucking the oil Q. A pump 17 is provided as a drive source for the.

The controller 7 is, for example, a computer to which various information is input, and is connected to a power source (not shown), electrode terminals 3 and 4, a vibration detector 5, and a switching actuator 15 and a pump 17 for the oil supplier 6. It is connected.

Next, the operation of the oil adjusting device will be described with reference to the flowchart of FIG.

When the oil flow pipe 1 is inserted to a predetermined position in the automatic transmission A (block 21) and the lower end side thereof is immersed in the oil Q, the oil flow pipe 1 from the lower flow port 9 is inserted.
The oil Q enters inside, and the level detecting magnet 2 floats on the oil surface. The oil flow pipe 1 is inserted from the charging pipe (see FIG. 4) of the automatic transmission A. Further, at the start of adjustment, the controller 7 tells the controller 7 to measure the oil temperature no, the oil level nl, the distance measurement coefficient k, the volume coefficient S in the automatic transmission A, the oil expansion coefficient B, the reference oil temperature TO and A constant for measurement such as the adjusted oil level LA is set (blocks 22 and 23).

After that, in the controller 7, the oil temperature sensor 12
Is used to calculate the average oil temperature T (blocks 24 to 28), and the level detecting magnet 2, the terminals 3 and 4 and the vibration detector 5 are used. The oil level is measured a predetermined number of times n1 and the average oil level L is calculated (blocks 29 to 36).

At this time, in the above adjusting device, a current is applied in a pulsed manner to the oil flow pipe 1 by the terminals 3 and 4 of the electrodes, and the electromagnetic force (Lorentz force) is applied to the pulse at the position of the level detecting magnet 2. The oil flow pipe 1 is vibrated. And the controller 7
In the above, the position of the level detecting magnet 2 in the oil flow pipe 1 is calculated based on the time from when the vibration is detected to when the vibration is detected by the vibration detector 5, and this is set as the position L of the oil level. From this result, the amount of oil Q at the time of measurement can be obtained.

After the above measurement, the controller 7 determines the adjustment amount V of the oil Q based on the oil temperature T, the position L of the oil surface, and the initially set measurement constant (block 3).
7), depending on the adjustment amount V, the oil Q is supplied to the oil supply device 6.
To inject or aspirate.

That is, if the adjustment amount V is positive (NO) in the block 38 because the oil Q is less than the specified amount, the return pipe 1 is opened by the switching door 16.
4a is closed, the oil Q in the oil tank 13 is sent out by the pump 17, and the oil Q is injected into the automatic transmission A through the oil flow pipe 1 (block 39,
40). Also, because the oil Q is more than the specified amount,
In block 38, the adjustment amount V is negative (YE
If it is determined as S), the switching door 16 is used to feed the feed pipe 14b.
And the pump 17 is actuated to suck the oil Q in the automatic transmission A through the oil flow pipe 1 (blocks 41, 42) and return the oil Q to the oil tank 13.

At this time, when oil is injected into the oil flow pipe 1, the level detecting magnet 2 is pushed by the flow of oil to a position lower than the lower flow port 9 as shown in FIG. 2 (a). When the oil is sucked and the oil is sucked, as shown in FIG. 2B, the same level detection magnet 2 is pushed to a higher position than the upper flow port 8, and the oil flow is prevented at all. Never.

After the oil injection or suction is completed (block 43), it is judged whether or not the adjustment position is appropriate (block 44). If it is not appropriate (NO), block 24 is determined. Each measurement and adjustment of ~ 43 are performed again, and when appropriate (YES), the adjustment work is ended.

Thus, in the above oil adjusting device,
By using the level detecting magnet 2 housed in the oil flow pipe 1, even when the oil level is shaken by the stirring of the oil by the torque converter 50 shown in FIG.
The position of the oil surface is automatically and accurately detected without being affected by the shaking. Further, since the oil flow pipe 1 is a single pipe and can adopt the maximum diameter that can be inserted into the charging pipe, the flow rate of oil per unit time can be increased as much as possible. Become.

Further, in the above oil adjusting device, the adjustment amount V of the oil Q is corrected based on the measurement value of the oil temperature sensor 12 provided in the oil flow pipe 1, so that the viscosity of the oil changes with the temperature. Even if it is, the accurate adjustment amount V can be obtained by inputting information such as the property of oil into the controller 7 in advance, and the injection or suction of the oil Q can be performed according to the adjustment amount V. Done.

[0029]

As described above, according to the oil adjusting device for the automatic transmission according to claim 1 of the present invention, the
Compared to the conventional device that used a heavy structure injection / suction pipe, the oil flow pipe as a single pipe can increase the oil flow rate, so the adjustment work time can be increased accordingly. The oil level can be shortened, and the position of the oil level is detected using the level detection magnet floating in the oil in the oil flow pipe, so it is possible to perform detection without being affected by the shaking of the oil level. As a result, the amount of oil can be adjusted accurately.

Further, according to the oil adjusting device for the automatic transmission according to the second aspect of the present invention, even if the viscosity of the oil changes with the temperature, the accurate adjusting amount is determined accordingly. Therefore, in combination with the effect of the first aspect, the adjustment accuracy can be further enhanced.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an oil adjusting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view for explaining a state (a) when oil is injected into the oil flow pipe and a state (b) when oil is suctioned.

FIG. 3 is a flowchart for explaining a processing process of the controller following the work at the time of oil adjustment.

FIG. 4 is a side view showing a state in which a conventional injection / suction pipe is inserted into a charging pipe of an automatic transmission.

[Fig. 5] When adjusting the amount of oil with a conventional injection / suction pipe, a large amount of oil (a), a small amount of oil (b), a state of sucking oil (c),
FIG. 6 is a cross-sectional view showing a state (d) in which a prescribed amount of oil remains.

[Explanation of symbols]

 1 Oil Flow Pipe 2 Level Detection Magnet 3 Anode Terminal (Electrode) 4 Cathode Terminal (Electrode) 5 Vibration Detector 6 Oil Supplyer 7 Controller 12 Oil Temperature Sensor A Automatic Transmission Q Oil

Claims (2)

[Claims] 1. An oil distribution pipe vertically inserted into an automatic transmission, a level detecting magnet housed in the oil distribution pipe so as to be vertically movable and floating in oil, and a current is applied to the oil distribution pipe in a pulsed manner. The electrode, a vibration detector that detects vibration of the oil flow pipe, an oil supply device that injects and sucks oil through the oil flow pipe, and the time from when electricity is applied by the electrode until the vibration is detected by the vibration detector. A controller for calculating the position of the level detecting magnet in the oil flow pipe based on the above, determining the adjustment amount of oil, and instructing the oil supply device to perform the operation of oil injection / suction according to the adjustment amount An oil adjustment device for an automatic transmission, which is characterized in that 2. The oil adjusting device for an automatic transmission according to claim 1, wherein an oil temperature sensor is provided in the oil flow pipe, and the controller adjusts the oil adjustment amount based on the measured value of the oil temperature sensor. An oil adjustment device for an automatic transmission, which is characterized in that