KR101764506B1 - Hydraulic system of auto transfer for all wheel drive vehicle - Google Patents

Hydraulic system of auto transfer for all wheel drive vehicle Download PDF

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Publication number
KR101764506B1
KR101764506B1 KR1020150185602A KR20150185602A KR101764506B1 KR 101764506 B1 KR101764506 B1 KR 101764506B1 KR 1020150185602 A KR1020150185602 A KR 1020150185602A KR 20150185602 A KR20150185602 A KR 20150185602A KR 101764506 B1 KR101764506 B1 KR 101764506B1
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KR
South Korea
Prior art keywords
flow path
oil
oil pump
cylinder
cover case
Prior art date
Application number
KR1020150185602A
Other languages
Korean (ko)
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KR20170076828A (en
Inventor
김진완
김영수
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현대다이모스(주)
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Priority to KR1020150185602A priority Critical patent/KR101764506B1/en
Publication of KR20170076828A publication Critical patent/KR20170076828A/en
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Publication of KR101764506B1 publication Critical patent/KR101764506B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/348—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed
    • B60K17/35—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having differential means for driving one set of wheels, e.g. the front, at one speed and the other set, e.g. the rear, at a different speed including arrangements for suppressing or influencing the power transfer, e.g. viscous clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0435—Pressure control for supplying lubricant; Circuits or valves therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0436—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
    • F16H57/0441—Arrangements of pumps

Abstract

The present invention relates to a hydraulic device for a four-wheel drive vehicle automatic transfer, in which a cover case (10) is integrally formed with an oil tank (31), a motor (210) and an oil pump (220) And a cylinder formed on the inner surface of the cover case 10 are formed. As described above, a hydraulic device for operating the automatic transfer is provided.

Description

Technical Field [0001] The present invention relates to a hydraulic system for a four-wheel drive vehicle automatic transfer,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic device for a four-wheel drive vehicle automatic transfer, and more particularly, to a hydraulic device for supplying operation force of a power distributing multi-plate clutch in an automatic transfer of a four-

The vehicle has all-wheel drive system (FF), rear-wheel drive system (FR) and four-wheel drive system (4WD). The four-wheel drive system has part-time four-wheel drive system and all-wheel drive system.

The part-time four-wheel drive system allows the driver to switch between two-wheel drive and four-wheel drive conditions to facilitate driving and escaping on the road at his own discretion.

In addition, the four-wheel drive system at all times allows the electronic control unit to more efficiently and stably run on various road conditions such as acceleration, cruise, snow, and ice road by judging the driving conditions and appropriately distributing the driving forces of the front and rear wheels It is.

The distribution of the driving force of the front / rear wheels is made by electronically controlled automatic transfer.

1, the three axes of a rear output shaft, an idle shaft, and a front output shaft are arranged in parallel, and a driving gear 1, an idle gear 2, Driven gears 3 are provided and engaged with each other.

The driving gear 1 mounted on the rear output shaft is installed so as to be rotatable with respect to the rear output shaft. The drive gear 1 is connected to the rear output shaft by the operation of the multi-plate clutch 4. Accordingly, the transmission input is transmitted to the front output shaft via the drive gear 1, the idle gear 2, and the driven gear 3 to distribute the driving force to the front wheels.

The multi-plate clutch 4 is operated by an armature 6, a ball ramp 7, a worm gear 8 and a motor 9, as shown in Fig. That is, when the motor 9 is operated, the worm gear 8 is rotated, and the worm gear 8 rotates to rotate the one ball ramp plate so that the thickness of the ball ramp 7 is expanded, And finally the armature 6 compresses the multiple disk clutch 4 to connect the driving gear 1 to the rear output shaft 5 so that the driving gear 1 is rotated.

The conventional automatic transfer control as described above controls the operation of the worm gear 8 and the ball ramp 7 by controlling the operation of the motor 9 to thereby control the compressive force of the multiple disc clutch 4 by the armature 6 It is difficult to precisely control the coupling force of the multiple disc clutch 4 because there are many operation and control elements as well as a slip in the ball ramp 7. Therefore, it is difficult to accurately distribute the driving forces of the front wheels and the rear wheels according to the control program.

The conventional transfer has a parallel three-shaft structure and has an idle gear 2 for connecting them between the drive gear 1 and the driven gear 3 and an idle gear shaft for rotating the idle gear 2 So that the size and weight of the transfer increases.

The applicant of the present invention has developed a new automatic transfer system that solves the above problems. The newly developed automatic transfer system is operated by hydraulic pressure, and a hydraulic apparatus for supplying hydraulic pressure is required.

It is therefore an object of the present invention to provide a hydraulic device for supplying hydraulic pressure to a cylinder provided with a piston for operating a multi-plate clutch in a new automatic transfer device.

According to an aspect of the present invention, there is provided an automatic transfer device for a four-wheel drive vehicle having a piston that applies an operating force to a multi-plate clutch for interlocking a drive gear with a rear output shaft, An oil tank formed on one side of the cover case and connected to the oil tank and the cylinder via the inside of the body of the cover case; An oil pump installed to supply oil to the cylinder through the oil passage, a motor connected to the oil pump for operating the oil pump, and a controller for controlling the operation of the motor.

The flow path includes a first flow path connecting the oil tank and the inlet of the oil pump, a second flow path extending from the outlet of the oil pump to the original plate portion of the cover case, A third flow path, and a supply hole communicating the third flow path with the cylinder.

A fourth flow path connecting the second flow path and the oil tank is formed, and at the intersection of the second flow path and the fourth flow path, when the oil pump operates, oil is supplied to the cylinder by opening the second flow path, Way valve that connects the second flow path and the fourth flow path to return the oil in the cylinder to the oil tank.

A fifth flow path connecting the second flow path and the oil tank is formed, and a relief valve is provided at the inlet of the fifth flow path to open the supply fluid pressure when the supply fluid pressure is equal to or larger than a set magnitude.

The supply holes may be formed at equal intervals in the third flow path.

An air vent valve communicating with the cylinder is provided in the disk portion of the cover case and an air vent passage connecting the outlet of the air vent valve and the oil tank is formed in the disk portion of the cover case.

A pressure sensor is installed at one side of the third flow path, and the pressure sensor transmits measurement information to the controller.

An oil pump housing is integrally formed adjacent to the oil tank, and the oil pump is inserted into the oil pump housing.

And the motor is integrally coupled to the oil pump so that the motor / pump module can be constructed.

According to the present invention as described above, it is possible to provide a hydraulic device capable of supplying and shutting hydraulic pressure to an automatic transfer operated by hydraulic pressure and adjusting the size thereof.

Further, since the oil tank and the oil passage are integrally formed in the cover case, and the motor and the oil pump are integrally mounted to the cover case, a separate pipe constituting the oil passage is unnecessary, and the configuration of the transfer system is further simplified.

Further, since the third flow path is formed along the circumferential direction at the rim portion of the cover portion of the cover case and the plurality of supply holes are formed at equal intervals in the third flow path, the hydraulic pressure can be applied to the piston more quickly and uniformly, The operational response and operational stability are improved.

Further, one channel can be shared by the supply channel and the return channel using the two-way valve, thereby simplifying the channel structure.

Further, the magnitude of the supply pressure is kept below the set value by the relief valve, thereby protecting the hydraulic device from the excessive pressure.

In addition, the operation of the piston is improved by removing air from the cylinder through the air vent valve.

1 is a configuration diagram of an automatic transfer according to the prior art.
2 is a schematic view showing a multi-plate clutch operating structure of a conventional automatic transfer.
3 is a configuration diagram of an automatic transfer according to the present invention;
Fig. 4 is an installation view of the automatic transfer hydraulic device according to the present invention. Fig.
5 is a hydraulic circuit diagram of an automatic transfer hydraulic device according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The thicknesses of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

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

3, the automatic transfer of a four-wheel drive vehicle to which the present invention is applied has a drive gear 50 and a driven gear 60 inside the front case 10 and the rear case 20 coupled to each other And includes a multi-plate clutch and a piston (110) for operating the multi-plate clutch in a cover case (30) mounted on one side of the rear case (20).

The drive gear 50 is rotatably mounted on the rear output shaft 40 passing through the entire case and the front output shaft 70 is inserted into the driven gear 60.

The multiple disc clutch includes a clutch drum 90 which is coupled to one end of the hub of the drive gear 50 and which is integrally rotated and a clutch hub 90 which is inserted into the clutch drum 90 and splined to the rear output shaft 40, And a plurality of friction discs 92 provided between the clutch drum 90 and the clutch hub 91. [ A part of the friction disk 92 is engaged with the inner circumferential surface of the clutch drum 90 and the other part is engaged with the outer circumferential surface of the clutch hub 91. The friction disc on the clutch drum 90 and the friction disc on the clutch hub 91 are arranged one after another. The friction discs 92 are provided movably in the axial direction.

The piston 110 is inserted into a cylinder formed inside the cover case 30 and an armature is provided between the piston 110 and the friction disk 92. Accordingly, when the hydraulic pressure is supplied to the cylinder, the piston 110 is protruded to push the armature, and the armature is brought into close contact with the friction discs 92 so that the clutch hub 91 and the clutch drum 90 can transmit power Lt; / RTI >

The rotation of the rear output shaft 40 is transmitted to the drive gear 50 via the multi-plate clutch so that the driven gear 60 and the front output shaft 70 are rotated. This rotational force is transmitted to the front wheels via the propeller shaft, the differential gear, and the drive shaft.

The present invention relates to a hydraulic device for forming a hydraulic pressure for operating the piston (110) in an automatic transfer of the above-described configuration, and will be described below with reference to Figs. 3 to 5.

The hydraulic device of the automatic transfer device for a four-wheel drive vehicle according to the present invention comprises a cylinder formed on an inner surface of a cover case 30 and having a piston 110 inserted therein, an oil tank 31 formed on an outer side of the cover case 30, A flow path for connecting the oil tank 31 to the cylinder via the inside of the body of the cover case 30 and a flow path for oil supplied to one side of the oil tank 31, A motor 210 connected to the oil pump 220 to operate the oil pump 220 and a controller 300 for controlling the operation of the motor 210.

The oil tank 31 is formed at an outer side of the cover case 20 and is supplied with oil to transfer pressure to the piston 110.

The flow path includes a first flow path 32 connecting the oil tank 31 and the inlet of the oil pump 220 and a second flow path extending from the outlet of the oil pump 220 to the disc portion of the cover case 30 A third flow path 36 formed along the circumferential direction inside the rim portion of the cover portion 30 of the cover case 30 and a third flow path 36 communicating with the third flow path 36 and the cylinder inside the cover case 30 A hole 37 and a fourth flow path 34 connecting the second flow path 33 and the oil tank 31.

The supply holes 37 may be formed at a plurality of intervals along the third flow path 36.

The flow path further includes a fifth flow path (35) connecting the second flow path (33) and the oil tank (31) at a position spaced from the position where the fourth flow path (34) is formed by a predetermined distance.

The oil pump 220 is inserted into the oil pump housing (referred to as a portion surrounding the oil pump 220 in FIG. 4) formed outside the cover case 30 and adjacent to the oil tank 31. The first flow path 32 is formed inside the oil pump housing.

The motor 210 is integrated with the oil pump 220 to form a module (motor / pump module 200). Only the oil pump 220 is inserted into the oil pump housing, And is located outside the housing, so that the contact portions of both are coupled with the bolts. As the motor 210, a brushless DC (BLDC) motor may be used.

The controller 300 receives information on the running state of the vehicle from various sensors of the vehicle and a controller (electronic control unit) such as an ABS (Anti-lock brake system), a TCS (Traction control system) And operates the motor 210 when it is determined that the driving force distribution to the front wheels is necessary. Also, the magnitude of the driving force distributed to the front wheels can be adjusted by controlling the operation of the motor 210 to adjust the magnitude of the hydraulic pressure supplied to the cylinders. Thus, appropriate driving force distribution can be performed on the front wheels and the rear wheels according to the driving conditions.

An oil filter (400) is installed in the first flow path (32) to filter foreign matters contained in oil supplied from the oil tank (31).

Way valve 410 is installed at the connection portion of the second flow path 33 through which the oil discharged from the oil pump 220 flows and the fourth flow path 34 connected to the oil tank 31. The two-way valve 410 blocks the oil pump 220 side portion and the cylinder side portion of the second flow path 33 when the oil pump 220 is not operated and closes the cylinder side portion of the second flow path 33, Thereby keeping the flow path 34 in a connected state. In addition, when the oil pump 220 operates, the inner ball is pushed by the oil pressure to connect the oil pump 220 side portion of the second oil path 33 to the cylinder side portion, and cut off the fourth oil path 34. That is, when the oil pump 220 operates, oil can be supplied from the oil pump 220 to the cylinder. When the oil pump 220 is not operated, the oil in the cylinder can return to the oil tank 31 have.

A relief valve 420 is installed at the inlet of the fifth flow path 35 connected to the second flow path 33. The relief valve 420 limits the upper limit of the hydraulic pressure. When the hydraulic pressure supplied to the cylinder rises above a preset maximum value, the valve is opened to return a part of the supplied oil to the oil tank 31.

An air vent valve 430 is provided at one side of the cover part of the cover case 30 so as to communicate with the cylinder and an air outlet port of the air vent valve 430 is connected to the oil tank 31 through an air vent passage 38. [ . The air vent passage 38 is formed inside the disk portion of the cover case 30 and may be seen as having a section partially overlapping with the third flow passage 36 in FIG. 4. However, the third air passage 36 and the air vent passage 38 Are formed at different positions inside the thickness of the disc portion of the cover case 30, and there is no portion communicating with each other. That is, the third flow path 36 is formed on the inner side surface of the disk portion of the cover case 30 and the air vent path 38 is formed on the outer surface side of the disk portion of the cover case 30.

A pressure sensor 440 is installed at one side of the disc portion of the cover case 30 to communicate with the third flow path 36. The pressure sensor 440 transmits the hydraulic pressure measurement information to the controller 300. The controller 300 converts the magnitude of the supplied hydraulic pressure therefrom and uses it to control the motor 210. [

The operation of the present invention will now be described.

When the controller 300 operates the motor 210 to operate the oil pump 220, the oil in the oil tank 31 is sucked / compressed by the oil pump 220 through the first flow path 32, (The oil pump side portion of the second flow path with respect to the two-way valve 410). The oil passes through the oil filter 400 while passing through the first flow path 32, and the foreign substance is removed.

The oil discharged from the oil pump 220 flows through the second flow path 33 by opening the second flow path 33 by pushing the balls of the two way valve 410 and flows through the third flow path 33 to the third And is supplied to the flow path 36.

The oil is supplied from the third flow path 36 to the cylinder formed on the inner surface of the cover case 30 through the supply hole 37 to push the piston 110 installed in the cylinder. Therefore, as described above, the multi-plate clutch is operated so that the driven gear 60 is rotated by interlocking the driving gear 50 to the rear output shaft 40, so that the driving force can be transmitted to the front wheel through the front output shaft 70 do.

The air remaining in the cylinder when the oil is supplied to the cylinder is discharged through the air vent valve 430 and discharged to the oil tank 31 through the air vent passage 38. [

The relief valve 420 is opened and part of the oil in the second flow path 33 is discharged to the oil tank 31 through the fifth flow path 35. In this case, Therefore, the magnitude of the hydraulic pressure acting on the cylinder can be kept below the set value.

The controller 300 converts the supply pressure from the measurement information of the pressure sensor 440 and uses it to control the motor 210.

On the other hand, when the controller 300 stops the operation of the motor 210, the operation of the oil pump 220 is stopped, so that the oil is not discharged to the second flow path 33. Therefore, the two-way valve 410 is changed to the original state, and the cylinder side portion of the second flow path 33 is communicated with the fourth flow path 34. The oil in the cylinder flows into the second flow path 33 through the supply hole 37 and the third flow path 36 and then returns to the oil tank 31 through the fourth flow path 34.

As described above, according to the present invention, it is possible to provide a hydraulic device that can supply and shut off hydraulic pressure to an automatic transfer operated by hydraulic pressure and adjust its size.

The present invention is also characterized in that the oil tank 31 and the flow path are integrally formed in the cover case 30 and the motor / pump module 200 is integrally mounted to the cover case 30, There is an effect that the configuration of the transfer system becomes simpler.

In the present invention, since the third flow path 36 is formed along the circumferential direction at the edge portion of the disk portion of the cover case 30 and the plurality of supply holes 37 are formed at equal intervals in the third flow path 36 Since the hydraulic pressure can be applied to the piston 110 more quickly and uniformly, there is an effect that the operational response and operational stability of the piston 110 are improved.

Further, the present invention can use one channel as a supply channel and a return channel by using the two-way valve 410, thereby simplifying the channel structure.

In addition, the present invention is effective in that the relief valve 420 maintains the magnitude of the supply pressure below the set value, thereby protecting the hydraulic apparatus from the transient pressure.

Also, the present invention has the effect of improving the operability of the piston 110 by removing the air of the cylinder through the air vent valve 430. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

10: front case 20: rear case
30: cover case 31: oil tank
32: first flow path 33: second flow path
34: fourth flow path 35: fifth flow path
36: Third flow path 37: Supply hole
38: Air vent passage 40: Rear output shaft
50: drive gear 60: driven gear
70: front output shaft 200: motor / pump module
210: motor 220: oil pump
300: Controller 400: Oil filter
410: Two way valve 420: Relief valve
430: Air vent valve 440: Pressure sensor

Claims (9)

An automatic transfer of a four-wheel drive vehicle having a piston for applying an operating force to a multi-plate clutch for interlocking a drive gear with a rear output shaft,
A cylinder formed on an inner surface of a cover case in which the multi-plate clutch is installed, the cylinder having the piston inserted therein,
An oil tank formed on an outer side of the cover case,
A flow path connecting the oil tank and the cylinder via the inside of the body of the cover case,
An oil pump mounted on one side of the oil tank and supplying oil to the cylinder through the oil passage,
A motor connected to the oil pump to operate the oil pump,
And a controller for controlling operation of the motor,
The flow path includes a first flow path connecting the oil tank and the inlet of the oil pump, a second flow path extending from the outlet of the oil pump to the original plate portion of the cover case, A third flow path, and a supply hole communicating the third flow path with the cylinder,
And a plurality of the supply holes are formed at equal intervals in the third flow path. delete The method according to claim 1,
A fourth flow path connecting the second flow path and the oil tank is formed, and at the intersection of the second flow path and the fourth flow path, when the oil pump operates, oil is supplied to the cylinder by opening the second flow path, And a two-way valve for connecting the second and fourth flow paths to return the oil in the cylinder to the oil tank. The method according to claim 1,
Wherein a relief valve is provided at the inlet of the fifth flow path to open the relief valve when the supply hydraulic pressure is greater than a predetermined magnitude. delete The method according to claim 1,
An air vent valve communicating with the cylinder is provided in a disk portion of the cover case, and an air vent passage connecting the outlet of the air vent valve and the oil tank is formed in the disk portion of the cover case. Hydraulic device of transfer. The method according to claim 1,
Wherein a pressure sensor is provided at one side of the third flow path, and the pressure sensor transmits measurement information to the controller. The method according to claim 1,
Wherein the oil pump housing is integrally formed adjacent to the oil tank and the oil pump is inserted into the oil pump housing. The method of claim 8,
And a motor / pump module is formed by integrally connecting the motor to the oil pump.
KR1020150185602A 2015-12-24 2015-12-24 Hydraulic system of auto transfer for all wheel drive vehicle KR101764506B1 (en)

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KR101764506B1 true KR101764506B1 (en) 2017-08-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005289308A (en) * 2004-04-05 2005-10-20 Suzuki Motor Corp Structure and method for assembling automatic transmission
JP2008232368A (en) * 2007-03-23 2008-10-02 Univance Corp Driving force distributing device
JP4656509B2 (en) 2005-07-15 2011-03-23 マツダ株式会社 Transmission clutch structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005289308A (en) * 2004-04-05 2005-10-20 Suzuki Motor Corp Structure and method for assembling automatic transmission
JP4656509B2 (en) 2005-07-15 2011-03-23 マツダ株式会社 Transmission clutch structure
JP2008232368A (en) * 2007-03-23 2008-10-02 Univance Corp Driving force distributing device

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