JPWO2019155900A1 - Oil supply structure - Google Patents

Abstract

The oil supply structure has a mechanical oil pump, a strainer connected to the suction port of the mechanical oil pump, and a line pressure adjusting valve connected to the discharge port of the mechanical oil pump, and oil is supplied from the drain oil passage to the strainer. It is provided with a second partial oil passage through which the oil flows. The mechanical oil pump may be an electric oil pump.

Description

The present invention relates to an oil supply structure.

JP2008-267498A discloses a vehicle oil supply device including a mechanical oil pump and an electric oil pump. This vehicle oil supply device is provided with a communication passage for introducing the oil in the lubrication / cooling oil passage to the suction side of the mechanical oil pump. The communication passage is disclosed as an oil passage for removing air in the mechanical oil pump by supplying oil to the mechanical oil pump when the electric oil pump is operated.

In the technology of JP2008-267498A, the communication passage introduces the oil in the lubrication / cooling oil passage arranged on the downstream side of the hydraulic control circuit. At this time, the oil is introduced into the connecting passage without using a strainer. Therefore, in the technology of JP2008-267498A, the electric oil pump sucks not a little foreign matter mixed in the hydraulic control circuit at the time of oil suction. As a result, for example, the seal of the hydraulic equipment such as a valve may be affected, and the durability of the hydraulic equipment may be deteriorated.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an oil supply structure capable of suppressing air intake by an oil pump while suppressing a decrease in durability of a hydraulic device.

The oil supply structure of an aspect of the present invention includes an oil pump, a strainer connected to an suction port of the oil pump, and a valve connected to the discharge port of the oil pump, and is directly connected to the valve. A supply oil passage for flowing oil from the oil passage to the strainer is provided.

According to this aspect, since oil is flowed from the valve constituting the hydraulic control circuit to the strainer in which the air pool is formed, the oil is cleaner than the case where the oil on the downstream side of the hydraulic control circuit is flowed to the strainer. Can be flushed to the strainer. Therefore, according to this aspect, it is possible to suppress the intake of air by the oil pump while suppressing the deterioration of the durability of the hydraulic equipment.

FIG. 1 is a schematic configuration diagram showing a main part of a vehicle. FIG. 2 is a first explanatory view of the oil supply structure. FIG. 3 is a second explanatory view of the oil supply structure. FIG. 4 is a third explanatory view of the oil supply structure.

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

FIG. 1 is a schematic configuration diagram showing a main part of a vehicle. In FIG. 1, for convenience of illustration, the first supply oil passage 61 and the second supply oil passage 62, which will be described later, are omitted. The vehicle is equipped with an engine ENG and an automatic transmission TM. The engine ENG constitutes the drive source of the vehicle. The automatic transmission TM is an automatic transmission composed of a belt-type continuously variable transmission, and has a torque converter TC, a forward / backward switching mechanism SWM, and a variator VA.

The torque converter TC transmits power via a fluid. In the torque converter TC, the power transmission efficiency is enhanced by engaging the lockup clutch LU.

The forward / backward switching mechanism SWM switches the forward / backward movement of the vehicle by switching the rotation direction of the input rotation. The forward / backward switching mechanism SWM includes a forward clutch CL that is engaged when the forward range is selected, and a reverse brake BRK that is engaged when the reverse range is selected. By releasing the forward clutch CL and the reverse brake BRK, the automatic transmission TM is put into the neutral state, that is, the power cutoff state.

The variator VA constitutes a belt-type continuously variable transmission mechanism having a primary pulley PRI, a secondary pulley SEC, and a belt BLT wound around the primary pulley PRI and the secondary pulley SEC.

The automatic transmission TM further includes a mechanical oil pump 1, an electric oil pump 2, a strainer 3, a controller 4, and a hydraulic control circuit 5.

The mechanical oil pump 1 is a mechanical oil pump driven by power, and the power of the engine ENG is used to drive the mechanical oil pump 1. The electric oil pump 2 is an oil pump driven by electric power. The mechanical oil pump 1 and the electric oil pump 2 suck oil from the oil reservoir OIL_R via the strainer 3 and pump the sucked oil to the flood control circuit 5.

The strainer 3 is a strainer common to the mechanical oil pump 1 and the electric oil pump 2, and includes the first suction oil passage 31, the second suction oil passage 32, the third suction oil passage 33, and the common suction oil passage 34. , With a filter 35.

The first suction oil passage 31 is an oil passage that connects the suction port 11 of the mechanical oil pump 1 and the common suction oil passage 34, and constitutes the suction oil passage of the mechanical oil pump 1. The second suction oil passage 32 is an oil passage that connects the suction port 21 of the electric oil pump 2 and the common suction oil passage 34, and constitutes the suction oil passage of the electric oil pump 2.

The third suction oil passage 33 is an oil passage that connects the oil reservoir OIL_R and the common suction oil passage 34, and constitutes a common suction oil passage for the mechanical oil pump 1 and the electric oil pump 2. The third suction oil passage 33 is connected to the first suction oil passage 31 and the second suction oil passage 32 via the common suction oil passage 34.

The common suction oil passage 34 is a suction oil passage shared by the mechanical oil pump 1 and the electric oil pump 2. The common suction oil passage 34 is made into a common oil passage by providing the filter 35 in the common suction oil passage 34 as a filter common to the mechanical oil pump 1 and the electric oil pump 2.

The filter 35 filters the oil. The filter 35 divides the inside of the common suction oil passage 34 into an upper space R1 above the filter 35 and a lower space R2 below the filter 35. The first suction oil passage 31 and the second suction oil passage 32 open in the upper space R1, and the third suction oil passage 33 opens in the lower space R2. The first suction oil passage 31, the second suction oil passage 32, and the third suction oil passage 33 can be grasped as different configurations from the strainer 3. The strainer 3 will be further described later.

The controller 4 is an ATCU, that is, a controller for an automatic transmission TM, and signals from sensors and switches 6 are input to the controller 4. Various signals required for controlling the automatic transmission TM are input from the sensors and switches 6.

The controller 4 controls the automatic transmission TM based on the signals from the sensors and switches 6. Specifically, the controller 4 controls the electric oil pump 2 and the hydraulic control circuit 5 based on the signals from the sensors and switches 6. The hydraulic control circuit 5 controls the forward clutch CL, the reverse brake BRK, the primary pulley PRI, the secondary pulley SEC, and the like based on the instruction from the controller 4. The controller 4 also controls the lockup clutch LU by controlling the low-voltage circuit LPC described later.

By the way, in the automatic transmission TM, an air pool may be formed in the strainer 3, specifically, in the upper space R1. On the other hand, if the mechanical oil pump 1 or the electric oil pump 2 inhales a large amount of air at one time, the oil pressure may decrease without being normally generated.

Therefore, it is conceivable to generate an oil flow in the upper space R1 so that a large air pool is not formed in the strainer 3 and inhale the air little by little together with the oil. For this purpose, for example, it is conceivable to flow oil from the low-voltage circuit LPC downstream of the hydraulic control circuit 5 to the strainer 3.

However, in this case, the mechanical oil pump 1 and the electric oil pump 2 suck the oil flowed into the strainer 3 from the downstream side of the hydraulic control circuit 5 without passing through the filter 35. Therefore, at this time, a large amount of foreign matter mixed in the hydraulic control circuit 5 is also sucked. As a result, for example, there is a concern that the seals of hydraulic equipment such as valves used in the automatic transmission TM may be affected, resulting in a decrease in durability of the hydraulic equipment.

In view of such circumstances, in the present embodiment, the oil supply structure 100 is provided as described below. 2 to 4 are first to third explanatory views of the oil supply structure 100. FIG. 2 shows an oil supply structure 100 together with a main part of the hydraulic control circuit 5. FIG. 3 shows an oil supply structure 100 together with a strainer 3 and a hydraulic control circuit 5. In FIG. 4, the inside of the strainer 3 is shown in a plan view.

As shown in FIG. 2, the hydraulic control circuit 5 includes a line pressure oil passage 51, a line pressure adjusting valve 52, a pressure reducing valve 53, a line pressure solenoid valve 54, a solenoid valve 55 for a forward / backward switching mechanism, and a manual. It includes a valve 56, a PRI pressure solenoid valve 57, an SEC pressure solenoid valve 58, a low pressure system pressure regulating valve 59, a drain oil passage 60, a first supply oil passage 61, and a second supply oil passage 62. In the present embodiment, the oil supply structure 100 includes a mechanical oil pump 1, an electric oil pump 2, a strainer 3, a line pressure adjusting valve 52, a low pressure system pressure regulating valve 59, a first supply oil passage 61, and a first. It is configured to have two supply oil passages 62. Hereinafter, the solenoid valve is referred to as SOL.

The line pressure oil passage 51 constitutes an oil passage of the line pressure PL, which is the main pressure of the flood control supplied to the automatic transmission TM. The line pressure oil passage 51 connects the discharge port 12 of the mechanical oil pump 1 and the discharge port 22 of the electric oil pump 2 with the line pressure adjusting valve 52, the pressure reducing valve 53, the PRI pressure SOL57, and the SEC pressure SOL58. In addition to these valves, the line pressure solenoid valve 54, the solenoid valve 55 for the forward / backward switching mechanism, the manual valve 56, and the low-pressure system pressure regulating valve 59 constitute a valve connected to the discharge port 12 and the discharge port 22.

The line pressure adjusting valve 52 is a first oil pressure adjusting valve, and regulates the oil discharged by at least one of the mechanical oil pump 1 and the electric oil pump 2 to generate a line pressure PL.

The pressure reducing valve 53 is a hydraulic control valve and reduces the line pressure PL. The oil pressure reduced by the pressure reducing valve 53 is supplied to the line pressure SOL54 and the forward / backward switching mechanism SOL55.

The line pressure SOL 54 is a control pressure generation SOL, and generates a control pressure according to a control current. The control pressure generated by the line pressure SOL 54 is supplied to the line pressure adjusting valve 52, and the line pressure adjusting valve 52 adjusts the pressure by operating according to the control pressure generated by the line pressure SOL 54.

The SOL55 for the forward / backward switching mechanism is a hydraulic control valve, and generates a hydraulic pressure according to a control current. The flood pressure generated by the forward / backward switching mechanism SOL55 is supplied to the forward clutch CL and the reverse brake BRK via a manual valve 56 that operates in response to the driver's operation.

The PRI pressure SOL57 is a hydraulic control valve, and generates the oil pressure of the primary pulley PRI, that is, the primary pressure according to the control current. The primary pressure generated by the PRI pressure SOL57 is supplied to the PRI oil chamber PRI_CY of the primary pulley PRI.

The SEC pressure SOL58 is a hydraulic control valve, and generates the oil pressure of the secondary pulley SEC, that is, the secondary pressure according to the control current. The secondary pressure generated by the SEC pressure SOL58 is supplied to the SEC oil chamber SEC_CY of the secondary pulley SEC.

Oil drained from the line pressure regulating valve 52 is supplied to the low pressure system pressure regulating valve 59 via the drain oil passage 60. The low-pressure system pressure regulating valve 59 is a second oil pressure adjusting valve, and adjusts the oil pressure supplied to the low-pressure system circuit LPC by adjusting the pressure of the oil drained from the line pressure adjusting valve 52. The low-voltage circuit LPC includes a pressure regulating valve 71 for a torque converter, which is a hydraulic control valve for the torque converter TC. The low-voltage circuit LPC further includes a lubrication / cooling system 72 of the automatic transmission TM downstream of the pressure regulating valve 71 for the torque converter. The low pressure system pressure regulating valve 59, for example, adjusts the pressure according to the control current.

The drain oil passage 60 is a drain oil passage of the line pressure adjusting valve 52, and constitutes an oil passage directly connected to the line pressure adjusting valve 52. The oil drained from the low-pressure pressure regulating valve 59 is supplied to the strainer 3 via the first supply oil passage 61.

The first supply oil passage 61 is a drain oil passage of the low pressure system pressure regulating valve 59, and connects the low pressure system pressure regulating valve 59 and the strainer 3. Specifically, the first supply oil passage 61 includes an internal supply oil passage 61a and an external supply oil passage 61b. The internal supply oil passage 61a is provided inside the hydraulic control circuit 5, and the external supply oil passage 61b is connected to the internal supply oil passage 61a from the outside of the hydraulic control circuit 5. The first supply oil passage 61 constitutes a supply oil passage for flowing oil from the drain oil passage 60 directly connected to the line pressure adjusting valve 52 to the strainer 3.

When connecting the low pressure system pressure regulating valve 59 and the strainer 3, the first supply oil passage 61 connects them without passing through the oil reservoir OIL_R. The first supply oil passage 61 flows from the line pressure adjusting valve 52 to the strainer 3 via the low pressure system pressure regulating valve 59, so that the oil drained from the line pressure adjusting valve 52 and the low pressure system pressure regulating valve 59 flows to the strainer 3. .. The first supply oil passage 61 is connected to the strainer 3 via a part of the second supply oil passage 62 by being connected to the second supply oil passage 62.

The second supply oil passage 62 directly connects the line pressure adjusting valve 52 and the strainer 3. Similar to the drain oil passage 60, the oil drained from the line pressure adjusting valve 52 also flows through the second supply oil passage 62. The second supply oil passage 62 includes a first partial oil passage 62a and a second partial oil passage 62b. The first partial oil passage 62a is composed of a portion of the second supply oil passage 62 on the upstream side of the connection point of the first supply oil passage 61. The second partial oil passage 62b is composed of a portion of the second supply oil passage 62 on the downstream side from the connection point of the first supply oil passage 61.

The second partial oil passage 62b is included in the second supply oil passage 62 that directly connects the line pressure adjusting valve 52 and the strainer 3, and the oil is supplied from the first partial oil passage 62a that is directly connected to the line pressure adjusting valve 52 to the strainer 3. Constructs a supply oil channel for flowing water. The second partial oil passage 62b may be grasped as an oil passage common to the first supply oil passage 61 and the second supply oil passage 62.

The reason for flowing oil from the line pressure adjusting valve 52 to the strainer 3 via the second supply oil passage 62 is as follows.

That is, the line pressure adjusting valve 52 is directly connected to the discharge port 12 of the mechanical oil pump 1 which is a hydraulic source. Therefore, the oil drained from the line pressure adjusting valve 52 has a sufficient flow rate from the viewpoint of the flow rate of the oil to be flowed to the strainer 3.

The line pressure adjusting valve 52 shown with hatching constitutes a direct connection valve that is directly connected to the discharge port 12 of the mechanical oil pump 1. The same applies to the pressure reducing valve 53, the PRI pressure SOL57, and the SEC pressure SOL58 shown with hatching. The oil passages shown with hatches indicate directly connected oil passages directly connected to the directly connected valves including the line pressure adjusting valve 52. The directly connected oil passage also has a sufficient flow rate from the viewpoint of the flow rate of the oil to be flowed to the strainer 3.

Specifically, the direct oil passage includes an upstream side direct oil passage provided on the upstream side of the direct connection valve and a downstream side direct oil passage provided on the downstream side of the direct connection valve. The downstream side direct oil passage is an oil passage that does not include an oil passage that is not directly connected to the direct valve on the upstream side. Therefore, the oil passage connecting the line pressure adjusting valve 52 and the strainer 3 via the low pressure system pressure regulating valve 59 includes the first supply oil passage 61 which is not directly connected to the direct connection valve on the upstream side, and thus constitutes a direct connection oil passage. do not do.

The downstream side direct connection oil passage is further referred to as an oil passage in which the lubrication cooling system 72 is not provided downstream. Therefore, the drain oil passage 60 at the portion connecting the line pressure adjusting valve 52 and the torque converter pressure adjusting valve 71 does not form a direct oil passage.

The downstream directly connected oil passage is composed of, for example, a first partial oil passage 62a. The downstream directly connected oil passage composed of the first partial oil passage 62a is specifically grasped as an oil passage further including the second partial oil passage 62b. In this case, it can be understood that the entire second supply oil passage 62 and the second partial oil passage 62b are directly connected oil passages and are directly connected to the downstream side. On the other hand, the downstream direct oil passage can also be an oil passage through which oil does not flow from the oil passage that is not directly connected to the direct valve on the upstream side. In this case, the second partial oil passage 62b through which the oil from the first supply oil passage 61 flows does not form a downstream side direct connection oil passage.

The drain oil passage 60 of the portion constituting the direct oil passage is directly connected to the low pressure system pressure regulating valve 59. The low-pressure pressure regulating valve 59 constitutes a direct oil passage valve that is directly connected to the direct oil passage on the downstream side. Specifically, the direct oil passage valve is composed of a flood control valve provided in the flood control circuit 5. The oil drained from the direct-coupled oil passage valve is smaller than the oil drained from the direct-coupled valve, but has a flow rate that can be used as the oil to be flowed into the strainer 3.

As shown in FIG. 3, the strainer 3 is arranged below the hydraulic control circuit 5. The common suction oil passage 34 has a thin flat shape in the vertical direction. The common suction oil passage 34 is provided with a first suction oil passage 31 at one end in the longitudinal direction and a second suction oil passage 32 at the other end in the longitudinal direction. The vertical direction and the longitudinal direction of the common suction oil passage 34 can be said to be the longitudinal direction and the longitudinal direction of the strainer 3.

The strainer 3 is from the first suction oil passage 31 side to which the suction port 11 of the mechanical oil pump 1 is connected to the second suction oil passage 32 side to which the suction port 21 of the electric oil pump 2 is connected. It is provided so as to be inclined upward toward. Specifically, the strainer 3 is arranged so that the longitudinal direction is closer to the horizontal direction in the vertical direction and the horizontal direction. As a result, the lower end position of the second suction oil passage 32 is higher than the lower end position of the first suction oil passage 31. Specifically, only the common suction oil passage 34 may be arranged in an inclined manner.

As a result of arranging the strainer 3 in this way, in the strainer 3, the other end of the upper space R1 in the longitudinal direction becomes the air collecting portion AIR. Specifically, an air reservoir is formed in the air reservoir AIR as follows.

Here, the mechanical oil pump 1 and the electric oil pump 2 suck up the oil in the oil reservoir OIL_R through the strainer 3 during operation. As a result, the lower space R2 has an atmospheric pressure, while the upper space R1 has a negative pressure. Therefore, when the oil passes through the filter 35, the oil is depressurized from the atmospheric pressure to the negative pressure, and as a result, the air dissolved in the oil under the atmospheric pressure is deposited. Then, the air precipitated in this way gathers in the air pool portion AIR due to buoyancy, and an air pool is formed.

The second partial oil passage 62b extends downward from the lower part of the main body of the hydraulic control circuit 5 and is connected to the upper part of the strainer 3, specifically, the upper part of the common suction oil passage 34. Specifically, the second partial oil passage 62b is connected to a portion of the strainer 3 between the first suction oil passage 31 and the second suction oil passage 32. More specifically, the second partial oil passage 62b is connected to the portion of the strainer 3 on the second suction oil passage 32 side.

The second partial oil passage 62b connected in this way allows the oil drained from the line pressure adjusting valve 52 to flow to the upper portion of the strainer 3. Specifically, the upper portion of the strainer 3 is the upper portion of the strainer 3 in the inclination direction. As a result, the flow of oil flowing through the air collecting portion AIR in the strainer 3 can be easily formed in the strainer 3. Specifically, the upper portion of the strainer 3 in the vertical direction is a portion included in the upper space R1 in the strainer 3.

The discharge port OUT of the second partial oil passage 62b is provided laterally in the strainer 3. The horizontal direction is the longitudinal direction of the strainer 3 or the direction inclined with respect to the vertical direction. In the lateral direction, the acute angle formed in the longitudinal direction of the strainer 3 is smaller than 45 °, and the smaller the acute angle formed in the longitudinal direction is preferable. This facilitates the formation of an oil flow in the strainer 3.

In the second partial oil passage 62b, the discharge port OUT is provided laterally in the strainer 3, so that the oil drained from the line pressure adjusting valve 52 is discharged laterally into the strainer 3. From the discharge port OUT, the oil drained from the line pressure adjusting valve 52 becomes a jet and is discharged into the strainer 3. As a result, a flow of oil is formed in the strainer 3. As shown in FIG. 4, the oil flow is specifically a swirling flow that swirls in the air pool portion AIR and heads in the opposite direction. At the time of turning, the oil turns in the width direction of the strainer 3 and turns.

By forming such an oil flow in the strainer 3, even if air is deposited as described above, the deposited air is sucked into the mechanical oil pump 1 during operation little by little. As a result, the formation of air pools is also suppressed. The same applies to the operation of the electric oil pump 2.

Next, the main action and effect of the oil supply structure 100 will be described.

The oil supply structure 100 includes a mechanical oil pump 1, a strainer 3 connected to a suction port 11 of the mechanical oil pump 1, and a line pressure adjusting valve 52 connected to a discharge port 12 of the mechanical oil pump 1. A second partial oil passage 62b for flowing oil from the drain oil passage 60 to the strainer 3 is provided. The mechanical oil pump 1 may be an electric oil pump 2.

According to such a configuration, the oil flows directly from the line pressure adjusting valve 52 constituting the hydraulic control circuit 5 to the strainer 3 in which the air pool is formed, so that the oil in the low-voltage circuit LPC is compared with the case where the oil is flowed into the strainer 3. Then, cleaner oil can be poured into the strainer 3. Therefore, according to such a configuration, it is possible to suppress the intake of air by the mechanical oil pump 1 while suppressing the deterioration of the durability of the hydraulic equipment such as the valve.

When oil flows from the oil supply channel for hydraulic pressure such as the line pressure oil passage 51 to the strainer 3, the oil pressure in the oil passage decreases by that amount, so it is necessary to increase the amount of oil supplied to the mechanical oil pump 1 and the electric oil pump 2. is there.

In the present embodiment, the second partial oil passage 62b allows the oil drained from the line pressure adjusting valve 52 to flow to the strainer 3. According to such a configuration, it is possible to avoid increasing the amount of oil supplied by the mechanical oil pump 1 and the electric oil pump 2.

In the present embodiment, the second partial oil passage 62b allows the oil drained from the line pressure adjusting valve 52 to flow to the upper portion of the strainer 3 in the vertical direction. According to such a configuration, by forming a flow of oil flowing through the air collecting portion AIR in the strainer 3 in the strainer 3, air is sucked little by little into the mechanical oil pump 1 and the electric oil pump 2 during operation. It becomes possible to make it.

In the present embodiment, the second partial oil passage 62b discharges the oil drained from the line pressure adjusting valve 52 laterally into the strainer 3. According to such a configuration, a strong oil flow can be formed in the strainer 3.

The oil supply structure 100 further includes an electric oil pump 2, and a third suction oil passage 33, which is a suction oil passage common to the mechanical oil pump 1 and the electric oil pump 2. Further, the strainer 3 is provided in the third suction oil passage 33 as a strainer common to the mechanical oil pump 1 and the electric oil pump 2, and also has a first suction oil passage 31 and a second suction oil passage 32. It is composed. The lower end position of the second suction oil passage 32 is higher than the lower end position of the first suction oil passage 31.

According to such a configuration, by causing the mechanical oil pump 1 during operation to suck air little by little, it is possible to prevent the started electric oil pump 2 from sucking a large amount of air from the air collecting portion AIR at one time.

In the present embodiment, the second partial oil passage 62b is connected to the portion of the strainer 3 between the first suction oil passage 31 and the second suction oil passage 32. According to such a configuration, the oil discharged from the second partial oil passage 62b into the strainer 3 can swirl in the air collecting portion AIR to form a swirling flow in the opposite direction. Therefore, it is possible to make it more difficult to generate an air pool, and it is possible to suck air little by little by the mechanical oil pump 1 or the electric oil pump 2 during operation.

In the present embodiment, the valve connected to the discharge port 12 of the mechanical oil pump 1 is, for example, a line pressure adjusting valve 52. Instead of the line pressure adjusting valve 52, for example, a pressure reducing valve 53, a line pressure SOL54, a forward / backward switching mechanism SOL55, a PRI pressure SOL57, an SEC pressure SOL58 or a low pressure system pressure regulating valve 59 are connected to the discharge port 12 of the mechanical oil pump 1. It may be a valve. The pressure reducing valve 53, the PRI pressure SOL57, and the SEC pressure SOL58 are the above-mentioned direct connection valves. Further, the line pressure SOL54, the forward / backward switching mechanism SOL55, and the low pressure system pressure regulating valve 59 are the above-mentioned direct oil passage valves. According to such a configuration, the amount of oil flowing to the strainer 3 can be appropriately secured during the operation of the mechanical oil pump 1 and the electric oil pump 2.

In the oil supply structure 100, the valve connected to the discharge port 12 of the mechanical oil pump 1 further includes a low pressure system pressure regulating valve 59 in addition to the line pressure adjusting valve 52. Further, in the second partial oil passage 62b, oil is flowed from the line pressure adjusting valve 52 through the low pressure system pressure regulating valve 59, so that the oil drained from the line pressure adjusting valve 52 and the low pressure system pressure regulating valve 59 is sent to the strainer 3. Shed.

According to such a configuration, the oil drained from the line pressure regulating valve 52 is further regulated by the low pressure system pressure regulating valve 59. On the other hand, according to such a configuration, the oil drained from the low pressure system pressure regulating valve 59 is flowed to the strainer 3 without flowing a part of the oil pressure adjusted by the low pressure system pressure regulating valve 59 to the strainer 3. Therefore, it is possible to avoid increasing the amount of oil in the mechanical oil pump 1 and the electric oil pump 2 by the amount that the oil pressure is lowered by flowing a part of the oil regulated by the low pressure system pressure regulating valve 59.

Although the embodiments of the present invention have been described above, the above embodiments are only a part of the application examples of the present invention, and the technical scope of the present invention is limited to the specific configurations of the above embodiments. Absent.

In the above-described embodiment, the case where the automatic transmission TM is a belt-type continuously variable transmission has been described. However, the automatic transmission TM may be, for example, a toroidal continuously variable transmission or a stepped automatic transmission.

The present application claims priority under Japanese Patent Application No. 2018-019498 filed with the Japan Patent Office on February 6, 2018, and the entire contents of this application are incorporated herein by reference.

The oil supply structure of an aspect of the present invention includes an oil pump, a strainer connected to an suction port of the oil pump, and a valve connected to the discharge port of the oil pump, and is directly connected to the valve. Further, the strainer is provided with a supply oil passage for flowing oil, and the supply oil passage allows oil to flow from the upper side in the vertical direction and discharge oil laterally . Further, according to another aspect, an oil having an oil pump, a strainer connected to the suction port of the oil pump, and a valve connected to the discharge port of the oil pump, and directly connected to the valve. A supply oil passage for flowing oil from the path to the strainer is provided, the oil pump includes a mechanical oil pump and an electric oil pump, and further includes a suction oil passage common to the mechanical oil pump and the electric oil pump. The strainer is provided in the suction oil passage as a strainer common to the mechanical oil pump and the electric oil pump, and also has a first suction oil passage connected to a suction port of the mechanical oil pump and the electric motor. The oil supply structure is configured to have a second suction oil passage connected to the suction port of the oil pump, and the lower end position of the second suction oil passage is higher than the lower end position of the first suction oil passage. Will be done.

Claims (8)

With an oil pump
A strainer connected to the suction port of the oil pump and
A valve connected to the discharge port of the oil pump and
Have,
An oil supply structure including a supply oil passage for flowing oil from the oil passage directly connected to the valve to the strainer. The oil supply structure according to claim 1.
The supply oil passage allows the oil drained from the valve to flow to the strainer.
Oil supply structure. The oil supply structure according to claim 2.
The supply oil passage allows the oil drained from the valve to flow to the upper portion of the strainer in the vertical direction.
Oil supply structure. The oil supply structure according to claim 3.
The supply channel laterally discharges the oil drained from the valve into the strainer.
Oil supply structure. The oil supply structure according to claim 3 or 4.
The oil pump includes a mechanical oil pump and an electric oil pump.
Further provided with a suction oil passage common to the mechanical oil pump and the electric oil pump,
The strainer is provided in the suction oil passage as a strainer common to the mechanical oil pump and the electric oil pump, and also has a first suction oil passage connected to a suction port of the mechanical oil pump and the electric oil. It is configured to have a second suction oil passage connected to the suction port of the pump.
The lower end position of the second suction oil passage is higher than the lower end position of the first suction oil passage.
Oil supply structure. The oil supply structure according to claim 5.
The supply oil passage is connected to a portion of the strainer between the first suction oil passage and the second suction oil passage.
Oil supply structure. The oil supply structure according to any one of claims 1 to 6.
The valve is a hydraulic control valve provided in a hydraulic control circuit of an automatic transmission.
Oil supply structure. The oil supply structure according to claim 7.
The valves include a first oil pressure adjusting valve that adjusts a line pressure that is the main pressure of the oil supply supplied to the automatic transmission, and a second oil pressure adjusting valve that adjusts the oil drained from the first oil pressure adjusting valve. Including
In the supply oil passage, oil is flowed from the first oil pressure adjusting valve through the second oil pressure adjusting valve, so that the oil drained from the first oil pressure adjusting valve and the second oil pressure adjusting valve is sent to the strainer. Shed,
Oil supply structure.

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