JP6130688B2 - Hydraulic transmission device for automatic transmission - Google Patents

Description

  The present invention relates to a hydraulic pressure supply device for an automatic transmission.

  An electric motor driven by an electric motor in addition to a hydraulic pump driven by the internal combustion engine in preparation for stopping the internal combustion engine mounted in the idling stop control when a predetermined condition is satisfied when stopping at a red light at the intersection It is known to provide a hydraulic pump to improve the rising response of the hydraulic pressure when the internal combustion engine is restarted.

  However, since the operation of the electric hydraulic pump is mainly limited when stopped, it is disadvantageous in terms of cost, weight, and installation space. There has been proposed a hydraulic pressure supply device for an automatic transmission in which first and second electromagnetic switching valves are arranged in an oil passage to operate an electric hydraulic pump as a hydraulic motor.

  That is, in the technique described in Patent Document 1, when restarting after idling stop control, the suction port of the electric hydraulic pump is connected to the reservoir via the first electromagnetic switching valve, and the discharge port is connected to the second electromagnetic switching valve. Connect to hydraulic actuator of automatic transmission. Next, when surplus occurs in the hydraulic fluid discharged from the main hydraulic pump driven by the internal combustion engine during traveling, the first electromagnetic switching valve is operated to connect the discharge port of the main hydraulic pump to the suction port of the electric hydraulic pump In addition, the discharge port of the electric hydraulic pump is connected to the reservoir via the second electromagnetic switching valve, and thus the electric hydraulic pump is operated as a hydraulic motor to generate power (regenerate) with surplus hydraulic oil. .

Japanese Patent No. 5050902

  The technique described in Patent Document 1 is configured as described above, and uses excess hydraulic oil (hydraulic pressure) with a high line pressure for regeneration (power generation). The configuration is complicated in that one electromagnetic switching valve is required, and disadvantages still remain in cost, weight, and installation space.

  Accordingly, the object of the present invention is to solve the above-mentioned inconvenience, improve the hydraulic pressure rising response at the time of restart with a simpler structure, and use the excess hydraulic oil with a high line pressure for regeneration. The object is to provide a hydraulic pressure supply device for an automatic transmission.

In order to achieve the above object, a hydraulic pressure supply device for an automatic transmission according to claim 1 includes a first hydraulic pump connected to an internal combustion engine mounted on a vehicle, and an electric motor mounted on the vehicle. A second hydraulic pump connected to a motor and capable of rotating in the forward and reverse directions, a first oil passage connecting a discharge port of the first hydraulic pump and a hydraulic actuator of the automatic transmission, and the first oil passage are supplied to the first oil passage. Discharged from the first regulator valve, a first regulator valve that regulates the pressure of the hydraulic oil to a first predetermined pressure, a second oil passage that connects the first oil passage and the discharge port of the second hydraulic pump, and the like. A third oil passage for supplying hydraulic oil to the second hydraulic pump; and a pressure of the hydraulic oil that is inserted into the third oil passage and discharged from the first regulator valve to the third oil passage. The second pressure is adjusted to a second predetermined pressure lower than the predetermined pressure. A regulator valve, a first one-way valve that allows the hydraulic oil discharged from the second hydraulic pump to the second oil passage to be supplied to the hydraulic actuator, and the second regulator valve to the third oil passage. A second one-way valve that allows the discharged hydraulic oil to be supplied to the discharge port of the second hydraulic pump, and a fourth that connects the hydraulic oil discharged from the first regulator valve to the lubrication system of the hydraulic actuator. An oil passage, and a third regulator valve that is inserted into the fourth oil passage and that regulates and discharges hydraulic oil discharged from the first regulator valve to a third predetermined pressure lower than the second predetermined pressure. And so on.

In the automatic transmission hydraulic pressure supply device according to claim 2, the first hydraulic pump connected to the internal combustion engine mounted on the vehicle and the forward and reverse rotation connected to the electric motor mounted on the vehicle are possible. A second hydraulic pump, a first oil passage connecting the discharge port of the first hydraulic pump and the hydraulic actuator of the automatic transmission, and the pressure of the hydraulic oil supplied to the first oil passage is a first predetermined pressure. A first regulator valve that regulates pressure, a second oil passage that connects the first oil passage and a discharge port of the second hydraulic pump, and hydraulic fluid discharged from the first regulator valve to the second hydraulic pump A third oil passage that is supplied to the second oil passage, and a second oil pressure that is inserted into the third oil passage and discharged from the first regulator valve to the third oil passage is lower than the first predetermined pressure. A second regulator valve for adjusting the pressure to a predetermined pressure; A first one-way valve that allows the hydraulic oil discharged from the hydraulic pump to the second oil passage to be supplied to the hydraulic actuator; and the hydraulic oil that is discharged from the second regulator valve to the third oil passage. a second one-way valve that allows supply to the discharge port of the second hydraulic pump, the hydraulic oil discharged from the first regulator valve and a fourth oil passage connecting the lubricating system of the hydraulic actuator, the The fourth oil passage is connected only to an oil passage that guides hydraulic oil discharged from the first regulator valve to the second regulator valve in the third oil passage, and the second regulator valve is connected to the first oil passage. 4 the hydraulic pressure in the oil passage is configured as Ru adjustable der.

In the hydraulic transmission device for an automatic transmission according to the present invention , a first oil passage connecting a discharge port of a first hydraulic pump connected to an internal combustion engine mounted on a vehicle and a hydraulic actuator of the automatic transmission; A first regulator valve that regulates the pressure of the hydraulic oil supplied to the first oil passage to a first predetermined pressure, and a second that can be rotated forward and backward connected to the first oil passage and an electric motor mounted on the vehicle. The pressure of the hydraulic fluid discharged to the second oil passage connecting the discharge port of the hydraulic pump and the third oil passage supplying the hydraulic oil discharged from the first regulator valve to the second hydraulic pump is a first predetermined pressure. A second regulator valve that regulates the pressure to a second predetermined pressure that is lower than the pressure, a first one-way valve that allows the hydraulic oil discharged from the second hydraulic pump to the second oil passage to be supplied to the hydraulic actuator, Operation discharged from the regulator valve to the third oil passage Since it is configured to include a second one-way valve that allows the oil to be supplied to the discharge port of the second hydraulic pump, the idling stop control can improve the rising response of the hydraulic pressure at the time of restart, and the high line pressure The surplus hydraulic oil can be used for regeneration (power generation), and the configuration can be further simplified.

  That is, the pressure of the hydraulic oil discharged to the third oil passage connecting the first regulator valve and the discharge port of the second hydraulic pump connected to the electric motor mounted on the vehicle is the first predetermined pressure (line pressure). A second regulator valve that regulates and discharges the pressure to a lower second predetermined pressure (intermediate pressure), a first one-way valve that allows supply of hydraulic oil discharged from the second hydraulic pump to the hydraulic actuator, Since it comprised so that the 2nd one way valve which permits supply to the discharge port of the 2nd hydraulic pump of the hydraulic oil discharged | emitted from the 2nd regulator valve to the 3rd oil path could be provided, without using an electromagnetic switching valve The operation of the electric hydraulic pump (second hydraulic pump) can be switched to regenerative (power generation), and the cost, weight, and installation space can be reduced by that amount. Product It is possible to use the oil to regeneration.

In addition , since the hydraulic oil discharged from the first regulator valve is configured to include the fourth oil passage that connects to the lubrication system of the hydraulic actuator, the hydraulic oil can be reliably supplied to the lubrication system of the hydraulic actuator.

Furthermore , since the hydraulic oil discharged from the first regulator valve that is inserted into the fourth oil passage is regulated to a third predetermined pressure that is lower than the second predetermined pressure, the third regulator valve is provided. The hydraulic oil can be supplied to the lubricating system of the hydraulic actuator more reliably.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing an overall hydraulic pressure supply device for an automatic transmission according to an embodiment of the present invention. FIG. 2 is a schematic view similar to FIG. 1 showing an operation at the time of idling stop control of the apparatus shown in FIG. 1. FIG. 2 is a schematic view similar to FIG. 1, showing the operation of the device shown in FIG. 1 during low-speed traveling. FIG. 2 is a schematic view similar to FIG. 1, showing the operation of the device shown in FIG. 1 during high speed running.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment for implementing a hydraulic pressure supply device for an automatic transmission according to the invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic view generally showing a hydraulic pressure supply device for an automatic transmission according to an embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes a first hydraulic (oil supply) pump, and reference numeral 12 denotes a second hydraulic (oil supply) pump.

  Although not shown in the drawings, both the first hydraulic pump 10 and the second hydraulic pump 12 are inscribed gear pumps, and are rotatably accommodated in a casing that can be attached to a case of an automatic transmission. And an inner (drive) rotor in which six inner teeth are formed, and an outer (driven) rotor in which seven outer teeth that partially mesh with the inner teeth are formed on the outer peripheral side of the inner rotor. Note that the automatic transmission is, for example, a CVT (continuously variable transmission) as described in Japanese Patent Application Laid-Open No. 2012-237402.

  The inner rotor of the first hydraulic pump 10 is connected to an engine (ENG; internal combustion engine) 14 mounted on a vehicle (not shown). Specifically, the inner rotor of the first hydraulic pump 10 is spline-coupled to a gear drive shaft connected by a chain to the crankshaft of the engine 14 and is rotated (driven) in synchronization with the rotation of the engine 14.

  The outer rotor of the first hydraulic pump 10 is driven according to the rotation of the inner rotor, and hydraulic fluid (ATF) stored in the reservoir 16 by the rotation of the rotor is sucked from the suction port 10a and passes between the inner teeth and the outer teeth. And discharged from the discharge port 10b. The reservoir 16 comprises an oil pan formed at the bottom of the automatic transmission case.

  The second hydraulic pump 12 is connected to an electric motor (MOTOR) 20 mounted on the vehicle, and the inner rotor and the outer rotor are rotated (driven) in synchronization with the rotation of the electric motor 20.

  Also in the second hydraulic pump 12, the hydraulic oil (ATF) stored in the reservoir 16 is sucked from the suction port 12a by the rotation of the rotor, and is discharged from the discharge port 12b through between the inner teeth and the outer teeth. As shown in the figure, the second hydraulic pump 12 is configured as a bidirectional pump in which the suction port 12a and the discharge port 12b can rotate forward and backward.

The discharge port 10b of the first hydraulic pump 10 is connected to a first hydraulic actuator ("PH system", specifically, a hydraulic cylinder of a CVT pulley) 22 of the automatic transmission via a first oil passage 24, and The hydraulic fluid discharged from the discharge port 10 b of the hydraulic pump 10 is supplied to the hydraulic actuator 22 and the first oil passage 24. A first regulator valve 26 is disposed in the first oil passage 24.

  The first oil passage 24 is connected to the discharge port 12 b of the second hydraulic pump 12 by the second oil passage 30. More specifically, the first oil passage 24 is connected to the discharge port 12 b of the second hydraulic pump 12 by the second oil passage 30 on the upstream side of the arrangement position of the first regulator valve 26.

  The first regulator valve 26 and the discharge port 12 b of the second hydraulic pump 12 are connected by a third oil passage 32. As shown in the drawing, the second oil passage 30 and the third oil passage 32 are joined at a downstream position of the discharge port 12b of the second hydraulic pump 12.

  The first regulator valve 26 includes a spool (not shown) urged to a predetermined position by a spring 26a, an input port 26b opened and closed by the spool, an output port 26c, and a feedback oil passage 26d (shown by a broken line in the figure). ). The input port 26 b of the first regulator valve 26 is connected to the first oil passage 24, and the output port 24 c is connected to the third oil passage 32.

  The first regulator valve 26 inputs hydraulic oil supplied to the first hydraulic actuator 22 from an input port 26b whose opening degree is determined by a spool, and the line pressure (first predetermined pressure ( The pressure is adjusted to PH pressure)), and the excess flow rate is discharged to the third oil passage 32.

  A second regulator valve 34 is inserted in the third oil passage 32. Similarly to the first regulator valve 26, the second regulator valve 34 is also urged to a predetermined position by a spring 34a, an input port 34b that is opened and closed by the spool, an output port 34c, and a feedback oil passage. 34d (shown by broken lines in the figure).

  The discharge port 26c of the first regulator valve 26 is a second hydraulic actuator of the automatic transmission (shown as “TC system”, specifically, a hydraulic cylinder of a lock-up clutch of the torque converter) via a fourth oil passage 36. 40 and a lubrication system (referred to as “LUB system”) 42 composed of components that require lubrication of the first and second hydraulic actuators 22, 40.

  A third regulator valve 44 is inserted in the fourth oil passage 36. Similar to the first regulator valve 26, the third regulator valve 44 is also a spool (not shown) that is biased to a predetermined position by a spring 44a, an input port 44b that is opened and closed by the spool, an output port 44c, and a feedback oil passage. 44d (shown by broken lines in the figure).

  The third regulator valve 44 inputs hydraulic oil (excess hydraulic oil) discharged from the output port 26c of the first regulator valve 26 from an input port 44b whose opening is determined by a spool, and passes through a feedback oil passage 44d. The second hydraulic actuator 40 and the lubricating system are adjusted to a torque converter control pressure (third predetermined pressure (TC pressure)) lower than the first predetermined pressure by a prescribed value or a lubricating pressure (LUB pressure) lower than the torque converter control pressure. 42 is discharged.

  Returning to the description of the second regulator valve 34, the second regulator valve 34 is a part of the hydraulic oil discharged from the output port 26 c of the first regulator valve 26, more specifically, the output port of the first regulator valve 26. 26c, and the remaining hydraulic fluid (surplus hydraulic fluid) supplied to the TC system and the lubricating system 42 via the third regulator valve 44 is supplied from an input port 34b whose opening is determined by the spool. By inputting and adjusting via the feedback oil passage 34d, the back pressure of the first regulator valve 26 is lower than the line pressure (first predetermined pressure (PH pressure)) by a specified value, and the TC pressure (third predetermined pressure). ) To a higher intermediate pressure (second predetermined pressure).

  In addition, a first check valve (one-way valve) 50 is disposed in the second oil passage 30, and the first check valve 50 receives the first hydraulic oil discharged from the second hydraulic pump 12 to the second oil passage 30. The first hydraulic actuator 22 is allowed to flow through the oil passage 24, that is, only the supply (distribution) to the first hydraulic actuator 22 is allowed.

  Further, a second check valve (one-way valve) 52 is disposed in the third oil passage 32, and the second check valve 52 receives the second hydraulic oil discharged from the second regulator valve 34 to the third oil passage 32. It is configured to allow flow to the discharge port 12b of the hydraulic pump 12, that is, to allow only supply (distribution) to the discharge port 12b of the second hydraulic pump 12.

The electric motor 20 is connected to a current supply system 56 including a battery or the like via an ECU (electronic control unit) 54. ECU54 is CPU, ROM, a microcomputer having a RAM, etc. together by controlling the power supply to the electric motor 20, the current generated when the second hydraulic pump 12 as will be described later to function as a hydraulic motor It is sent to the current supply system 56 to be stored.

  Next, the operation of the hydraulic pressure supply apparatus according to this embodiment will be described.

  FIG. 2 is a schematic diagram showing an operation during idling stop control.

  In this case, since the engine 14 is stopped, the ECU 54 supplies current to the electric motor 20 to drive the second hydraulic pump 12. The second hydraulic pump 12 pumps hydraulic oil from the reservoir 16 and discharges it to the second oil passage 30. The hydraulic oil discharged to the second oil passage 30 passes through the first check valve 50, while the supply of the hydraulic oil to the third oil passage 32 is blocked by the second check valve 52. And is supplied to the first hydraulic actuator 22. Thereby, the rising response of the hydraulic pressure when the engine 14 is restarted is improved.

  FIG. 3 is a schematic diagram showing an operation during low-speed traveling.

  During low speed traveling, the first hydraulic pump 10 driven by the engine 14 pumps hydraulic oil from the reservoir 16 and supplies it to the first hydraulic actuator 22 via the first oil passage 24.

  When the pressure (hydraulic pressure) of the hydraulic oil flowing through the first oil passage 24 reaches the line pressure (PH pressure), excess hydraulic oil is discharged from the discharge port 26c of the first regulator valve 26 to the fourth oil passage 36, The hydraulic oil supplied to the second hydraulic actuator 40 and the lubrication system 42 via the three regulator valve 44 is returned to the reservoir 16 after lubricating each part.

  At this time, the first check valve 50 is closed, and hydraulic oil is prevented from flowing from the first oil passage 24 to the second hydraulic pump 12 via the second oil passage 30.

  FIG. 4 is a schematic diagram showing an operation during high-speed traveling.

  The first hydraulic pump 10 driven by the engine 14 draws hydraulic oil from the reservoir 16 and supplies it to the first hydraulic actuator 22 via the first oil passage 24 even during high speed travel.

  Similarly, when the pressure (hydraulic pressure) of the hydraulic fluid flowing through the first oil passage 24 reaches the line pressure (PH pressure), excess hydraulic fluid is discharged from the output port 26c of the first regulator valve 26 to the fourth oil passage 36. The hydraulic oil is supplied to the second hydraulic actuator 40 and the lubrication system 42 via the third regulator valve 44, and the hydraulic oil supplied to the lubrication system 42 is returned to the reservoir 16 after lubricating each part.

  At this time, the pressure of the hydraulic oil flowing through the fourth oil passage 36 reaches the torque converter control pressure (TC pressure (third predetermined pressure)), and the pressure of the hydraulic oil flowing through the third oil passage is equal to or higher than the TC pressure, the line pressure ( When the intermediate pressure (second predetermined pressure) set to be equal to or lower than the first predetermined pressure is reached, excess hydraulic oil is discharged from the output port 34 c of the second regulator valve 34 to the third oil passage 32.

  The hydraulic oil discharged from the output port 34 c of the second regulator valve 34 to the third oil passage 32 passes through the second check valve 52 and is sent to the discharge port 12 b of the second hydraulic pump 12. As a result, the discharge port 12b and the suction port 12a are interchanged, and the second hydraulic pump 12 operates (functions) as a hydraulic motor that is rotated by hydraulic oil sucked from the discharge port 12b. The generated (regenerative) power obtained by the second hydraulic pump 12 is sent to the current supply system 56 via the ECU 54 and stored in the battery.

  Note that the pressure of the hydraulic oil discharged from the output port 34c of the second regulator valve 34 and acting on one of the first check valves 50 via the third oil passage 32 and the second oil passage 30 is a line acting on the other. Since the intermediate pressure (second predetermined pressure) is lower than the pressure (first predetermined pressure (PH pressure)) by a specified value, the first check valve 50 remains closed even during high-speed operation.

  As described above, in the hydraulic pressure supply device for an automatic transmission according to this embodiment, the first hydraulic pump 10 connected to the engine (internal combustion engine) 14 mounted on the vehicle and the electric motor mounted on the vehicle. A second hydraulic pump 12 connected to the motor 20 and capable of rotating in the forward and reverse directions, a first oil passage connecting the discharge port 10a of the first hydraulic pump 10 and a hydraulic actuator (first hydraulic actuator) 22 of the automatic transmission. 24, a first regulator valve 26 that regulates the pressure of the hydraulic oil supplied to the first oil passage 24 to a first predetermined pressure (line pressure (PH pressure)), the first oil passage 24, and the second oil passage 24. A second oil passage 30 connecting the discharge port 12b of the hydraulic pump 12, a third oil passage 32 for supplying hydraulic oil discharged from the first regulator valve 26 to the second hydraulic pump 12, and the third Inserted in oil passage 32 A second regulator valve 34 for regulating the pressure of the hydraulic oil discharged from the first regulator valve 26 to the third oil passage 32 to a second predetermined pressure (intermediate pressure) lower than the first predetermined pressure; From the first check valve (one-way valve) 50 that allows the hydraulic oil discharged from the second hydraulic pump 12 to the second oil passage 30 to be supplied to the hydraulic actuator 22, and from the second regulator valve 34. Since it is configured to include a second check valve (one-way valve) 52 that allows supply of hydraulic oil discharged to the third oil passage 32 to the discharge port 12b of the second hydraulic pump 12, idling stop control is provided. Thus, the rise response of the hydraulic pressure when the engine 14 is restarted can be improved, and surplus hydraulic oil with a high line pressure can be used for regeneration (power generation). It can be easy.

  That is, the pressure of the hydraulic fluid discharged to the third oil passage 32 connecting the first regulator valve 26 and the discharge port 12b of the second hydraulic pump 12 connected to the electric motor 20 mounted on the vehicle is set to the first predetermined value. The second regulator valve 34 for adjusting the pressure to a second predetermined pressure (intermediate pressure) lower than the pressure (line pressure) and the supply of hydraulic oil discharged from the second hydraulic pump 12 to the first hydraulic actuator 22 are allowed. A first check valve 50 and a second check valve 52 that allows supply of hydraulic oil discharged from the second regulator valve 34 to the third oil passage 32 to the discharge port 12b of the second hydraulic pump 12 are provided. As a result, the operation of the second hydraulic pump (electric hydraulic pump) 12 can be switched to regenerative (power generation) without using an electromagnetic switching valve. Only space can be reduced, the surplus of the operating oil pressure of the line pressure can be utilized for regenerative (power generation) in a simpler configuration.

  In addition, since the hydraulic oil discharged from the first regulator valve 26 is configured to include a fourth oil passage 36 that connects the lubricating system 42 of the hydraulic actuators (first and second hydraulic actuators) 22 and 40, The hydraulic oil can be reliably supplied to the lubricating system 42 of the first and second hydraulic actuators 22 and 40.

  Further, the hydraulic oil that is inserted in the fourth oil passage 36 and discharged from the first regulator valve 26 is adjusted to a third predetermined pressure (TC pressure) lower than the second predetermined pressure (intermediate pressure) and discharged. Since the third regulator valve 44 is provided, the hydraulic oil can be supplied to the lubricating system of the hydraulic actuator more reliably.

  In the above description, the engine 14 is exemplified as the drive source. However, the drive source is not limited thereto, and the drive source may be a hybrid of the engine and the electric motor.

DESCRIPTION OF SYMBOLS 10 1st hydraulic pump, 10a suction port, 10b discharge port, 12 2nd hydraulic pump, 12a suction port, 12b discharge port, 14 engine (internal combustion engine), 16 reservoir, 20 electric motor, 22 1st hydraulic actuator, 24 1st 1 oil passage, 26 1st regulator valve, 30 2nd oil passage, 32 3rd oil passage, 34 2nd regulator valve, 36 4th oil passage, 40 2nd hydraulic actuator, 42 lubrication of 1st, 2nd hydraulic actuator System, 44 third regulator valve, 40 first check valve (one-way valve), 52 second check valve (one-way valve), 54 ECU (electronic control unit), 56 current supply system

Claims (2)

A first hydraulic pump connected to an internal combustion engine mounted on a vehicle, a second hydraulic pump connected to an electric motor mounted on the vehicle and capable of forward and reverse rotation, a discharge port of the first hydraulic pump, and an automatic A first oil passage that connects a hydraulic actuator of the transmission; a first regulator valve that regulates the pressure of hydraulic oil supplied to the first oil passage to a first predetermined pressure; the first oil passage and the first oil passage; A second oil passage connecting a discharge port of the two hydraulic pump, a third oil passage supplying hydraulic oil discharged from the first regulator valve to the second hydraulic pump, and an insertion in the third oil passage A second regulator valve that regulates the pressure of the hydraulic oil discharged from the first regulator valve to the third oil passage to a second predetermined pressure lower than the first predetermined pressure; and a second hydraulic pump Before hydraulic oil discharged to the second oil passage A first one-way valve that allows supply to the hydraulic actuator, and a second one that allows supply of hydraulic oil discharged from the second regulator valve to the third oil passage to the discharge port of the second hydraulic pump. A directional valve, a fourth oil passage connecting hydraulic oil discharged from the first regulator valve to a lubrication system of the hydraulic actuator, and inserted into the fourth oil passage and discharged from the first regulator valve. A hydraulic pressure supply device for an automatic transmission , comprising: a third regulator valve that regulates and discharges hydraulic oil to a third predetermined pressure lower than the second predetermined pressure . A first hydraulic pump connected to an internal combustion engine mounted on a vehicle, a second hydraulic pump connected to an electric motor mounted on the vehicle and capable of forward and reverse rotation, a discharge port of the first hydraulic pump, and an automatic A first oil passage that connects a hydraulic actuator of the transmission; a first regulator valve that regulates the pressure of hydraulic oil supplied to the first oil passage to a first predetermined pressure; the first oil passage and the first oil passage; A second oil passage connecting a discharge port of the two hydraulic pump, a third oil passage supplying hydraulic oil discharged from the first regulator valve to the second hydraulic pump, and an insertion in the third oil passage A second regulator valve that regulates the pressure of the hydraulic oil discharged from the first regulator valve to the third oil passage to a second predetermined pressure lower than the first predetermined pressure; and a second hydraulic pump Before hydraulic oil discharged to the second oil passage A first one-way valve that allows supply to the hydraulic actuator, and a second one that allows supply of hydraulic oil discharged from the second regulator valve to the third oil passage to the discharge port of the second hydraulic pump. comprising a directional valve, and a fourth oil passage connecting the hydraulic oil discharged from the first regulator valve to the lubrication system of the hydraulic actuator, the fourth oil passage, of the third oil passage, said first 1 is connected only to the oil passage a hydraulic oil discharged from the regulator valve leading to the second regulator valve, to said adjustable der Rukoto the second regulator valve of the fourth oil passage pressure hydraulic pressure supply device that automatic transmission.

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