JP2021060054A - Lubrication device - Google Patents

Abstract

To provide a lubrication device capable of actualizing well-responsive control of the storage amount of an oil tank in a simple construction.SOLUTION: A lubrication device 1 includes oil introduction flow paths L1, L2 for introducing oil into an oil pump 30, an oil tank 100 for storing the oil, a tank inlet flow path 110 for introducing the oil from the oil introduction flow paths into the oil tank, a tank outlet flow path 120 for introducing the oil from the internal of the oil tank to the oil introduction flow paths, an oil path switching valve to be driven by an actuator 220 to be displaced among a first state where the tank outlet flow path is closed and protruded into the oil introduction flow paths, a second state where the tank outlet flow path is closed and retracted from the oil introduction flow paths, and a third state where the tank outlet flow path is opened and retracted from the oil introduction flow paths, and a pressure sensitive valve provided in the tank inlet flow path so as to be opened according to pressure rise in the oil introduction flow paths when the oil path switching valve is in the first state.SELECTED DRAWING: Figure 2

Description

The present invention relates to a lubrication device provided in a transmission or the like of an automobile.

For example, in a transmission installed in an automobile such as a passenger car, oil that also serves as lubricating oil and hydraulic oil is sucked by a pump from an oil storage unit (oil pan) provided at the bottom of the transmission case, pressurized, and then changed. It is supplied to the control hydraulic circuit and the part to be lubricated.
In such a lubrication device, it is preferable to lower the oil level in the transmission case in order to suppress the agitation resistance of the oil, reduce the friction of the transmission, and prevent the deterioration of fuel consumption and the increase of heat generation. ..
However, when the oil level is lowered, for example, when the vehicle makes a sharp turn, sudden acceleration, sudden deceleration, etc. and a relatively large acceleration acts, or when the oil viscosity becomes high at extremely low temperatures, the oil pump Is concerned about sucking air in the transmission.
Therefore, it has been proposed to control the oil level in the transmission case according to the operating state of the vehicle.

As a conventional technique for controlling the amount of oil and the oil level in a transmission lubricator, for example, Patent Document 1 describes oil after being fed to each part of a transmission in an oil amount control device for an automatic vehicle transmission. , It is described that the oil level in the main tank is controlled by providing a control valve in the circulation path between the oil pump and the sub tank while returning to the main tank and the sub tank. Further, it is described that the control valve is controlled according to the load condition of the engine.
According to Patent Document 2, when a vehicle behavior in which acceleration increases occurs in a lubricator of an automatic transmission, the amount of oil supplied to the lubricating portion is reduced by a switch valve and supplied to the suction oil passage of the pump. It is described that increasing the amount of oil prevents air suction from the pump.

Japanese Unexamined Patent Publication No. 61-10162 Japanese Unexamined Patent Publication No. 2015-17624

As in Cited Document 1, a tank having a buffer function for temporarily storing excess oil is provided, and the oil level at the place where the suction port (strainer) of the oil pump is provided is raised only when necessary. By doing so, the oil level height can be lowered during normal running, and friction can be reduced.
However, in the technique described in Cited Document 1, the oil supply to the oil tank (sub tank) depends on the flow due to gravity, and the oil cannot be positively supplied to the sub tank.
Therefore, for example, when returning from a sharp turning state to a straight-ahead state and lowering the oil level in the strainer portion, it takes time to collect excess oil in the oil tank, and the oil level is controlled. There is concern that the responsiveness will be insufficient.
On the other hand, for example, it is conceivable to provide a flow path for introducing oil into the oil tank from a place where the pressure is relatively high in the hydraulic circuit, and open and close this flow path by a control valve. In this case, the oil tank Control valves are required for the flow paths on the entry side and the exit side, respectively, which complicates the device configuration.
In view of the above-mentioned problems, an object of the present invention is to provide a lubrication device capable of responsively controlling the amount of oil stored in an oil tank with a simple configuration.

The present invention solves the above-mentioned problems by the following solutions.
The invention according to claim 1 is an oil pump that pressurizes and discharges oil, an oil introduction flow path that introduces the oil into the suction port of the oil pump, and an oil formed in a container shape capable of storing the oil. The connection between the tank, the tank inlet flow path for introducing the oil from the oil introduction flow path to the inside of the oil tank, and the tank inlet flow path in the oil introduction flow path from the inside of the oil tank. A first state in which the tank outlet flow path for introducing oil into the region on the oil pump side, a first state driven by an actuator, which blocks the tank outlet flow path and at least a part of which protrudes into the oil introduction flow path, and the above. Oil that is displaced between a second state in which the tank outlet flow path is blocked and retracted from the oil introduction flow path and a third state in which the tank outlet flow path is opened and retracted from the oil introduction flow path. It is provided with a path switching valve and a pressure sensitive valve provided in the tank inlet switching valve and opened in response to a pressure rise in the oil introduction flow path when the oil passage switching valve is in the first state. It is a lubrication device characterized by.
According to this, when the oil passage switching valve is in the first state, the tank outlet flow path is blocked, and the oil passage switching valve protrudes into the oil introduction flow path, so that the pressure on the upstream side thereof is increased. Oil can be introduced into the oil tank by raising and opening the pressure sensitive valve.
Further, when the oil passage switching valve is in the second state, both the tank inlet flow path and the tank outlet flow path are blocked, and oil can be held inside the oil tank.
When the oil passage switching valve is in the third state, the tank outlet flow path is opened while the tank inlet flow path is closed, so that oil is introduced from the inside of the oil tank into the oil introduction flow path. can do.
As described above, according to the present invention, it is possible to control the oil supply to the oil tank, the oil retention in the oil tank, and the oil discharge from the oil tank by a single actuator for driving the oil passage switching valve. With a simple configuration, the amount of oil stored in the oil tank can be controlled with good responsiveness.

The lubrication according to claim 1, wherein the invention according to claim 1 includes an air inflow prevention valve that closes the tank outlet flow path when the amount of oil in the oil tank becomes a predetermined value or less. It is a device.
According to this, when the amount of oil in the oil tank decreases, it is possible to prevent the oil pump from sucking air through the tank outlet flow path.

The invention according to claim 3 is when the vent provided above the oil level in the oil tank is interlocked with the oil passage switching valve and the oil passage switching valve is in the second state. 1 or claim, further comprising a ventilation control valve that closes the vent and opens the vent when the oil passage switching valve is in the first state or the second state. Item 2. The lubrication device according to item 2.
According to this, when the oil is held in the oil tank, the vent is closed to prevent foreign matter from entering, and when the oil is introduced or discharged, the vent is opened to prevent the invasion of foreign matter. The pressure can be maintained appropriately and the amount of oil can be adjusted smoothly.

According to the fourth aspect of the present invention, the oil pump supplies the oil to the transmission of the vehicle, and drives the actuator according to the operating state of the vehicle to control the amount of oil in the oil tank. The lubrication device according to any one of claims 1 to 3, further comprising a control unit.
According to this, when there is a concern about inhaling air at a place where the strainer, which is the suction port of the oil pump, is placed (such as the oil pan at the bottom of the transmission), the oil is discharged from the oil tank. By raising the oil level near the strainer, it is possible to prevent the inhalation of air.
The invention according to claim 5 includes an oil temperature detecting unit that detects the temperature of the oil, and the control unit reduces the amount of oil in the oil tank when the temperature of the oil is equal to or less than a predetermined value. The lubrication device according to claim 4, wherein the lubricator is characterized by the above.
According to this, it is possible to prevent air intake of the oil pump due to an increase in the viscosity of the oil due to a low temperature.
The invention according to claim 6 includes a traveling state detecting unit that detects at least one of the turning state, the accelerating state, and the decelerating state of the vehicle, and the control unit is the turning state, the accelerating state, and the decelerating state. The lubrication device according to claim 4 or 5, wherein the amount of oil in the oil tank is reduced according to at least one detection.
According to this, it is possible to prevent air intake of the oil pump due to the inclination of the oil level in the vicinity of the strainer due to the acceleration acting on the vehicle body.

As described above, according to the present invention, it is possible to provide a lubrication device capable of responsively controlling the amount of oil stored in an oil tank with a simple configuration.

It is a figure which shows typically the oil passage structure in embodiment of the lubrication apparatus to which this invention is applied. It is a schematic sectional view of the peripheral part of the oil tank in the lubrication device of an embodiment, and is the figure which shows the state which introduces the oil into an oil tank. It is a schematic sectional view of the peripheral part of the oil tank in the lubrication device of an embodiment, and is the figure which shows the state which holds the oil in an oil tank. It is a schematic cross-sectional view of the peripheral part of the oil tank in the lubrication device of an embodiment, and is the figure which shows the state which discharges oil from an oil tank. It is a block diagram which shows typically the structure of the oil level control system of the oil tank in the lubrication device of embodiment. It is a flowchart which shows the oil level control of the oil tank in the lubrication apparatus of embodiment.

Hereinafter, embodiments of a lubrication device to which the present invention is applied will be described.
The lubrication device of the embodiment is provided in, for example, an automatic transmission provided in an automobile such as a passenger car.
As the automatic transmission, for example, a chain type continuously variable transmission (CVT) can be used.
FIG. 1 is a diagram schematically showing an oil passage configuration in the lubrication device of the embodiment.
The lubrication device 1 for supplying the control unit 10 with oil that also serves as the hydraulic oil and the lubricating oil for the automatic transmission and for lubricating the lubrication target portion such as the transmission mechanism portion is an oil pan 20, an oil pump 30, and an oil tank 100. And so on.

The oil pan 20 is provided at the lower part (bottom) of the transmission case, which is a housing for accommodating the control unit 10, the transmission mechanism, and the like, and is a recess that opens upward to store the oil that has flowed down inside the automatic transmission. Is what you do.

The oil pump 30 is a vane pump that pressurizes and discharges the oil introduced from the strainer 31 that is inserted into the oil pan 20 and immersed in the oil.
The oil discharged from the oil pump 30 is adjusted by a regulator (not shown) and then supplied to the control unit 10.

The control unit 10 is a unitized version of a hydraulic circuit and a control valve that supply hydraulic pressure to a hydraulic engagement element, a brake element, a chamber that controls a sheave interval in a CVT pulley, and the like provided inside an automatic transmission. Is.
The control unit 10 is arranged at the upper part in the transmission case, for example.
A part of the oil supplied to the control unit 10 flows down in the transmission case, lubricates the parts to be lubricated such as the transmission mechanism, and returns to the oil pan 20.
Further, the other part of the oil supplied to the control unit 10 is directly circulated to the suction port side of the oil pump 30 (oil introduction passages L1 and L2 described later) in a pressurized state.

The oil tank 100 is a container-shaped member provided adjacent to an oil passage for circulating oil from the control unit 10 to the oil pump 30 and capable of temporarily storing a part of the circulating oil.
The oil tank 100 stores excess oil in order to lower the oil level of the oil pan 20, for example, during normal running of the vehicle (a state in which warm-up is completed and the acceleration acting on the vehicle body is relatively low). At the same time, for example, it has a function of discharging oil to raise the oil level of the oil pan 20 at the time of a sharp turn, a sudden acceleration / deceleration, an extremely low temperature, or the like.
Hereinafter, the oil tank 100 and its oil level height adjusting mechanism will be described.

2, FIG. 3 and FIG. 4 are schematic cross-sectional views of the peripheral portion of the oil tank in the lubricating device of the embodiment, in which the oil is introduced into the oil tank, the oil is held in the oil tank, and the oil tank is held. It shows the state of releasing oil from each.
The oil tank 100 is formed, for example, having an upper surface portion 101 and a lower surface portion 102 extending in the horizontal direction and provided apart in the vertical direction, and a side surface portion 103 extending in the vertical direction.

Adjacent to the oil tank 100, oil introduction channels L1 and L2 for introducing oil from the control unit 10 to the suction port of the oil pump 30 are provided.
The oil introduction flow path L1 is provided so as to extend in the vertical direction along the side surface portion 103 of the oil tank 100.
The oil recirculated from the control unit 10 is supplied from the upper side of the oil introduction flow path L1 in a pressurized state.

The oil introduction flow path L2 is formed by branching in the horizontal direction from the vicinity of the lower end portion of the oil introduction flow path L1 and extends in the horizontal direction below the oil tank 100.
The oil introduced from the oil introduction flow path L1 to the oil introduction flow path L2 is supplied to the suction port of the oil pump 30.

The oil tank 100 is provided with a tank inlet flow path 110, a tank outlet flow path 120, a vent 130, a check valve 140, an oil passage switching valve 150, and the like.
The tank inlet flow path 110 introduces oil into the oil tank 100 from the oil introduction flow path L1.
The tank inlet flow path 110 is formed as a through hole extending in the horizontal direction from the oil introduction flow path L1 to the vicinity of the upper end portion of the side surface portion 103 of the oil tank 100.

The tank inlet flow path 110 is provided with a poppet valve 111 that opens and closes the tank inlet flow path 110.
The poppet valve 111 is normally urged by a compression coil spring from the inside of the oil tank 100 to close the tank inlet flow path 110.
The poppet valve 111 is a pressure-sensitive valve that opens when the pressure of the oil in the oil introduction flow path L1 is increased to a predetermined value or more.

The tank outlet flow path 120 introduces oil into the oil introduction flow path L2 from the inside of the oil tank 100.
The tank outlet flow path 120 is provided with an upper portion 121, an intermediate portion 122, and a lower portion 123 in this order from the oil tank 100 side (upstream side) along the oil flow direction.
The upper portion 121 extends downward from the lower surface portion 102 of the oil tank 100 along the vertical direction.
The intermediate portion 122 extends along the horizontal direction from the lower end portion of the upper portion 121.
The lower portion 123 extends in the vertical direction from the end portion on the downstream side (the side away from the upper portion 121) of the intermediate portion 122 to the lower side.
The lower portion 123 has a cylindrical inner peripheral surface into which the oil passage switching valve 150 is slidably inserted in the vertical direction.
The lower end of the lower portion 123 communicates with the oil introduction flow path L2.

Above the lower portion 123, a cylinder 124 is provided in which the valve body of the oil passage switching valve 150 is accommodated so as to be movable in the vertical direction.
The cylinder 124 has a cylindrical inner peripheral surface having an inner diameter equivalent to that of the lower 123.

The vent 130 is an opening that discharges air when the oil is introduced into the oil tank 100 and sucks air when the oil is discharged from the oil tank 100.
The vent 130 is arranged on the upper surface 101 of the oil tank 100 directly above the upper 121 of the tank outlet flow path 120.

The check valve 140 has an inlet portion of the tank outlet flow path 120 in order to prevent air from flowing into the tank outlet flow path 120 when the oil level height inside the oil tank 100 drops to a predetermined value or less. It is an air inflow prevention valve that closes.
The main body of the check valve 140 is formed in a columnar shape extending in the vertical direction, and the lower end is formed in a spherical shape.
The check valve 140 is configured to float near the oil level by buoyancy, and moves in the vertical direction along the guide portion 141 as the oil level rises and falls.
The lower end of the check valve 140 comes into contact with the inlet of the tank outlet flow path 120 when the oil level drops, and is blocked by the spherical end face.

The oil passage switching valve 150 is a valve body of a control valve that switches the introduction of oil into the oil tank 100, the holding of oil in the oil tank 100, and the discharge of oil from the oil tank 100.
The oil passage switching valve 150 is a cylindrical member having a central axis along the vertical direction.
The oil passage switching valve 150 is inserted into the cylinder 124 from below and is held in a state where it can be stroked in the vertical direction within a predetermined movable range.

The oil passage switching valve 150 is provided with a rod 151 and a ventilation control valve 152.
The rod 151 is a shaft-shaped member protruding upward from the main body of the oil passage switching valve 150.
The rod 151 penetrates a through hole provided in the lower surface portion 102 of the oil tank 100 and a vent 130 provided in the upper surface portion 101, and the upper end portion is arranged so as to project above the upper portion of the oil tank 100.
The upper end of the rod 151 is connected to an actuator 220 (see FIG. 5) that drives the oil passage switching valve 150.
The ventilation control valve 152 is a valve body that closes the ventilation port 130 when the oil passage switching valve 150 maintains the height of the oil level in the oil tank 100.
The ventilation control valve 152 is formed so as to project from the middle portion of the rod 151 toward the outer diameter side in a brim shape.

In the state shown in FIG. 2, the oil passage switching valve 150 is extended to the lowermost position within the movable range.
In this state (first state), the oil passage switching valve 150 closes the lower portion 123 of the tank outlet flow path 120 at the outer peripheral surface in the intermediate portion thereof.
Further, the lower end portion of the oil passage switching valve 150 is extended to the inside of the oil introduction flow path L2.
As the flow path resistance (pressure loss) increases due to the protrusion of the oil passage switching valve 150, in the region upstream of the oil passage switching valve 150 of the oil introduction flow path L2 and inside the oil introduction flow path L1. , The oil pressure rises.
As the oil pressure rises, the poppet valve 111 opens, and oil is introduced into the oil tank 100 from the oil introduction flow path L1 via the tank inlet flow path 110.
In this state, the height of the oil level OS inside the oil tank 100 rises.
At this time, since the ventilation control valve 152 is located below the ventilation port 130, the ventilation port 130 is opened and air is discharged from the inside of the oil tank 100.

In the state shown in FIG. 3, the oil passage switching valve 150 is located in the intermediate portion within the movable range.
In this state (second state), the oil passage switching valve 150 closes the lower portion 123 of the tank outlet flow path 120 at the outer peripheral surface of the lower portion thereof.
On the other hand, the lower end of the oil passage switching valve 150 is retracted upward from the oil introduction flow path L2, so that pressure loss does not occur inside the oil introduction flow path L2 as in the first state.
As a result, the internal pressure of the oil introduction flow path L1 becomes lower than that of the first state, the poppet valve 111 closes, and the introduction of oil from the oil introduction flow path L1 into the oil tank 100 is stopped.
In this state, the height of the oil level OS inside the oil tank 100 is maintained constant.
At this time, the ventilation control valve 152 closes the ventilation port 130.

In the state shown in FIG. 4, the oil passage switching valve 150 is located at the upper end portion (the position most pulled into the cylinder 124) within the movable range.
In this state (third state), the oil passage switching valve 150 opens the tank outlet flow path 120 and retracts from the oil introduction flow path L2. As a result, the oil in the oil tank 100 is introduced into the oil introduction flow path L2 (discharged from the oil tank 100) via the tank outlet flow path 120.
At this time, the poppet valve 111 is held in the closed state.
In this state, the height of the oil level OS inside the oil tank 100 decreases.
At this time, since the ventilation control valve 152 is located above the ventilation port 130, the ventilation port 130 is opened and air is sucked from the outside of the oil tank 100.

The lubrication device 1 of the embodiment includes a control system described below in order to control the actuator 220 that drives the oil passage switching valve 150 up and down and control the oil level of the oil pan 20.
FIG. 5 is a block diagram schematically showing a configuration of an oil level control system for an oil tank in the lubrication device of the embodiment.
The oil level control system 200 includes an oil level control unit 210, an actuator 220, an oil level sensor 230, an oil temperature sensor 240, a lateral G sensor 250, front and rear G sensors 260, and the like.

The oil level control unit 210 drives the actuator 220 in response to information from the oil level sensor 230, the oil temperature sensor 240, the lateral G sensor 250, and the front and rear G sensors 260.
The oil level control unit 210 may be configured to include, for example, a power supply device for supplying power to the actuator 220 and a microcomputer for controlling the power supply device. It may be realized by software in the transmission control unit that collectively controls the transmission and its accessories.

The actuator 220 is an electric actuator such as a solenoid.
The actuator 220 moves the oil passage switching valve 150 between the first state (lower end portion) and the third state (upper end portion) described above via the rod 151, and the first, second, and second states. It has a function of holding in the third state.

The oil level sensor 230 detects the height of the oil level OS inside the oil tank 100.
The oil temperature sensor 240 detects the temperature (oil temperature) of the oil circulating inside the lubrication device 1.
The lateral G-sensor 250 detects the turning state of the vehicle by detecting the acceleration in the lateral direction (vehicle width direction) acting on the vehicle body.
The front-rear G sensor 260 detects the acceleration / deceleration state of the vehicle by detecting the acceleration in the front-rear direction acting on the vehicle body.
The lateral G-sensor 250 and the front-rear G-sensor 260 function as a traveling state detection unit.

FIG. 6 is a flowchart showing oil level control of the oil tank in the lubrication device of the embodiment.
Hereinafter, each step will be described step by step.

<Step S01: Oil temperature judgment>
The oil level control unit 210 compares the oil temperature detected based on the output of the oil temperature sensor 240 with a preset threshold value.
This threshold value is set in consideration of the temperature at which the viscosity of the oil becomes extremely high and air suction from the strainer 31 is a concern, for example, in a so-called extremely cold environment.
If the oil temperature is equal to or lower than the threshold value, the process proceeds to step S07, and in other cases, the process proceeds to step S02.

<Step S02: Sharp turn judgment>
The oil level control unit 210 compares the lateral acceleration detected by the lateral G-force sensor 250 with a preset threshold value.
This threshold value is set in consideration of the acceleration at which air suction from the strainer 31 is a concern due to the inclination of the oil level of the oil pan 20 due to the lateral acceleration.
If the acceleration is equal to or greater than the threshold value, the process proceeds to step S07 assuming that a sharp turn has been detected, and in other cases, the process proceeds to step S03.

<Step S03: Sudden acceleration / deceleration judgment>
The oil level control unit 210 compares the acceleration in the front-rear direction detected by the front-rear G sensor 260 with a preset threshold value.
This threshold value is set in consideration of the acceleration at which air suction from the strainer 31 is a concern due to the inclination of the oil level of the oil pan 20 due to the acceleration in the front-rear direction.
If the absolute value of the acceleration is equal to or higher than the threshold values on the acceleration side and the deceleration side, the process proceeds to step S07 assuming that sudden acceleration / deceleration has been detected, and in other cases, the process proceeds to step S04.

<Step S04: Judgment of oil level in oil tank>
The oil level control unit 210 determines whether or not the height of the oil level OS in the oil tank 100 detected by the oil level sensor 230 is less than a preset target value (standard oil amount during normal driving). To determine.
If the oil level is less than the target value, the process proceeds to step S05, and in other cases, the process proceeds to step S06.

<Step S05: Introducing oil into the oil tank>
The oil level control unit 210 sets the oil passage switching valve 150 in the first state shown in FIG. 2 by the actuator 220.
As a result, the oil is introduced from the oil introduction flow path L1 into the oil tank 100.
After that, a series of processing is completed (returned).

<Step S06: Oil retention in the oil tank>
The oil level control unit 210 sets the oil passage switching valve 150 in the second state shown in FIG. 3 by the actuator 220.
As a result, the oil tank 100 does not introduce or release the oil, and the oil in the oil tank 100 is maintained in a constant amount.
After that, a series of processing is completed (returned).

<Step S07: Introducing oil into the oil tank>
The oil level control unit 210 brings the oil passage switching valve 150 into the third state shown in FIG. 4 by the actuator 220.
As a result, oil is introduced (released) from the oil tank 100 into the oil introduction flow path L2.
After that, a series of processing is completed (returned).

As described above, according to the present embodiment, the following effects can be obtained.
(1) It is possible to control the oil supply to the oil tank 100, the oil retention in the oil tank 100, and the oil discharge from the oil tank 100 by a single actuator 220 for driving the oil passage switching valve 150. With a simple configuration, the amount of oil stored in the oil tank 100 can be controlled with good responsiveness.
(2) By providing a check valve 140 that closes the tank outlet flow path 120 when the amount of oil in the oil tank 100 falls below a predetermined level, the oil pump 30 is provided via the tank outlet flow path 120 when the amount of oil decreases. Can prevent inhalation of air.
(3) By providing a ventilation control valve 152 that closes the ventilation port 130 when the oil passage switching valve 150 is in the second state and opens the ventilation port 130 when the oil passage switching valve 150 is in the first or second state. When the oil is held in the oil tank 100, the vent 130 is closed to prevent the invasion of foreign matter, and when the oil is introduced or discharged, the vent 130 is opened so that the inside of the oil tank 100 is opened. The pressure can be maintained appropriately and the amount of oil can be adjusted smoothly.
(4) When the temperature of the oil is equal to or lower than the threshold value, by reducing the amount of oil in the oil tank 100, it is possible to prevent air intake of the oil pump 30 due to an increase in the viscosity of the oil due to a low temperature.
(5) An oil pan near the strainer 31 due to acceleration acting on the vehicle body by reducing the amount of oil in the oil tank 100 in response to at least one detection of a sudden turning state, a sudden acceleration state, and a sudden deceleration state of the vehicle. It is possible to prevent air intake of the oil pump 30 due to the inclination of the oil level in 20.

(Modification example)
The present invention is not limited to the embodiments described above, and various modifications and modifications can be made, and these are also within the technical scope of the present invention.
(1) The configurations of the lubricator and the automatic transmission are not limited to the above-described embodiments, and can be appropriately changed.
The shape, structure, arrangement, quantity, etc. of each element constituting the lubricator and the automatic transmission can be changed as appropriate.
For example, in the embodiment, the oil pump is a vane pump as an example, but other types of pumps such as an inscribed gear pump can be used instead.
Further, in the embodiment, the transmission mechanism unit is a chain type continuously variable transmission as an example, but instead of this, other types of CVT such as a belt type, a half toroidal type, an electric type, a step AT, a DCT, an AMT, etc. It may be.
(2) The lubrication device of the embodiment has been provided in an automatic transmission of an automobile as an example, but the lubrication device of the present invention is not limited to this and can be used for lubrication of other devices.
(3) In the lubrication device of the embodiment, the sudden turning and sudden acceleration / deceleration of the vehicle are detected by using the acceleration sensor, but the method for detecting these is not limited to this and can be appropriately changed.
For example, a sharp turn of a vehicle can be detected based on a steering angle, a yaw rate, a vehicle speed, and the like.
Further, the sudden acceleration / deceleration of the vehicle can be detected based on the output of the power source for traveling, the braking force of the braking device, the rate of change of the vehicle speed, and the like.

1 Lubrication device 10 Control unit 20 Oil pan 30 Oil pump 31 Strainer L1 Oil introduction flow path L2 Oil introduction flow path 100 Oil tank 110 Inlet flow path 111 Poppet valve 120 Outlet flow path 121 Upper 122 Intermediate part 123 Lower 124 Cylinder 130 Vent 140 Check valve 141 Guide part 150 Oil passage switching valve 151 Rod 152 Ventilation control valve 200 Oil level control system 210 Oil level control part 220 Actuator 230 Oil level sensor 240 Oil temperature sensor 250 Horizontal G sensor 260 Front and rear G sensor

Claims (6)

An oil pump that pressurizes and discharges oil,
An oil introduction flow path for introducing the oil into the suction port of the oil pump,
An oil tank formed in the shape of a container capable of storing the oil, and
A tank inlet flow path for introducing the oil from the oil introduction flow path to the inside of the oil tank, and a tank inlet flow path.
A tank outlet flow path for introducing oil from the inside of the oil tank to a region on the oil pump side of the connection portion with the tank inlet flow path in the oil introduction flow path, and a tank outlet flow path.
The first state, which was driven by an actuator and blocked the tank outlet flow path and at least a part of which protruded into the oil introduction flow path, and the tank outlet flow path were blocked and retracted from the oil introduction flow path. An oil passage switching valve that is displaced between the second state and the third state in which the tank outlet flow path is opened and retracted from the oil introduction flow path.
Lubrication provided in the tank inlet flow path and provided with a pressure sensitive valve that opens in response to a pressure increase in the oil introduction flow path when the oil passage switching valve is in the first state. apparatus. The lubrication device according to claim 1, further comprising an air inflow prevention valve that closes the tank outlet flow path when the amount of oil in the oil tank falls below a predetermined level. Vents provided above the oil level in the oil tank and
In conjunction with the oil passage switching valve, the vent is closed when the oil passage switching valve is in the second state, and the oil passage switching valve is in the first state or the second state. The lubrication device according to claim 1 or 2, further comprising a ventilation control valve that sometimes opens the ventilation port. The oil pump supplies the oil to the transmission of the vehicle.
The lubrication according to any one of claims 1 to 3, further comprising a control unit that drives the actuator according to the operating state of the vehicle and controls the amount of oil in the oil tank. apparatus. It is provided with an oil temperature detection unit that detects the temperature of the oil.
The lubrication device according to claim 4, wherein the control unit reduces the amount of oil in the oil tank when the temperature of the oil is equal to or lower than a predetermined value. A traveling state detecting unit for detecting at least one of a turning state, an accelerating state, and a decelerating state of the vehicle is provided.
The fourth or fifth aspect of the present invention, wherein the control unit reduces the amount of oil in the oil tank in response to detection of at least one of the turning state, the accelerating state, and the decelerating state. Lubrication device.

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