CN102425541B - Constant power valve - Google Patents
Constant power valve Download PDFInfo
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- CN102425541B CN102425541B CN2011104309595A CN201110430959A CN102425541B CN 102425541 B CN102425541 B CN 102425541B CN 2011104309595 A CN2011104309595 A CN 2011104309595A CN 201110430959 A CN201110430959 A CN 201110430959A CN 102425541 B CN102425541 B CN 102425541B
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Abstract
The invention relates to a constant power valve, which comprises a piston guide sleeve, wherein the outer wall of the piston guide sleeve is provided with a load pressure interface, a lateral middle hole and an oil discharging hole; a valve core is arranged in the piston guide sleeve; a piston rod is arranged in the valve core; a first spring seat is arranged in the end part of the piston guide sleeve which is correspondingly connected with a protective cap; the end part of the piston rod which correspondingly extends into the protective cap is provided with a reset adjusting spring; an adjusting piston is provided with a high-pressure oil inlet; the end part of the piston rod which correspondingly extends into the adjusting piston passes through a spherical seat and is correspondingly matched with the spherical seat; a hydraulic oil through hole which is distributed along the axis of the piston rod is formed in the piston rod, and can be communicated with a hydraulic oil outlet; the end part of the piston rod which correspondingly extends into the adjusting piston is provided with a shaft coupling; and a one-way valve spring is arranged in the shaft coupling, and is correspondingly matched with a steel ball for blocking the hydraulic oil through hole in the piston rod. The constant power valve has a compact structure, the efficiency of a hydraulic system is increased, and the energy consumption of the hydraulic system is lowered.
Description
Technical field
The present invention relates to a kind of valve body structure for oil hydraulic pump, especially a kind of constant power valve, belong to the technical field of oil hydraulic pump.
Background technique
Traditional hydraulic system is controlled its flow and pressure by valve, but is that pressure valve or Flow valve all can produce heat loss, causes that the system heating value is large, inefficiency, if this loss of metering pump meeting is very large.Existing constant pressure variable displacement pump can be applied in the system of pressurize and pressure limiting requirement, but the unnecessary flow of variable displacement pump still flows back to fuel tank by relief valve, and efficiency is high not as the variable displacement with constant power pump.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of constant power valve is provided, its compact structure, the efficiency of raising hydraulic system, the energy consumption of reduction hydraulic system.
According to technological scheme provided by the invention, described constant power valve, comprise the piston guide cover, and the outer wall of described piston guide cover is provided with induced pressure interface, side direction mesopore and the unloading port that connects described piston guide cover; One end of described piston guide cover is provided with the protective cap be fastenedly connected, and the piston guide cover stretches in regulating piston corresponding to the other end be connected with protective cap, and can in regulating piston, move; Be provided with spool in piston guide cover, in described spool, be provided with piston rod, spool can be in the piston guide cover movement the induced pressure interface, side direction mesopore and the unloading port's corresponding matching that with piston guide, put; The two ends of piston rod are stretched into respectively in protective cap and regulating piston; The piston guide cover is provided with the first spring seat in the corresponding end be connected with protective cap, and described the first spring socket sleeve contacts on piston rod and with the end of spool; Piston rod has clamping bolt, described clamping bolt to be provided with the adjustment screw be fastenedly connected corresponding to the end cover stretched in protective cap, between described adjustment screw and the first spring seat, is provided with the adjustment spring that resets; Regulating piston is provided with the high pressure oil import, between the hydraulic oil outlet of high pressure oil import and regulating piston end, is provided with spheric seating, and described spheric seating is positioned at regulating piston, and is complementary with the cavity in regulating piston; Piston rod passes spheric seating cooperation corresponding with spheric seating corresponding to the end of stretching in regulating piston, is provided with the hydraulic oil through hole distributed along the piston rod axis in piston rod, and described hydraulic oil through hole can be connected with the hydraulic oil outlet; Piston rod is provided with joiner corresponding to the end of stretching into regulating piston, and an end of described joiner stretches in piston rod, and the other end stretches in regulating piston and exports corresponding with hydraulic oil; Be provided with check valve spring in joiner, an end of described check valve spring is connected with regulating piston, the other end and the interior corresponding cooperation of steel ball for liquid for plugging force feed through hole of piston rod.
The described adjustment spring that resets comprises big spring and little spring, and an end of described big spring is enclosed within on the first spring seat, and the other end is installed on the adjustment screw by being positioned at the adjustment screw-nut of adjusting on screw; Adjust in screw and be provided with the second spring seat, described the second spring socket sleeve is on piston rod, and described little spring is installed on piston rod by the first spring seat and the second spring seat; The second spring seat is connected with clamping bolt by press-on pins corresponding to the other end be connected with little spring.
Described clamping bolt is connected with the adjustment screw fastening by the clamping bolt nut.Described spheric seating uses the spiral back-up ring that packing ring is installed corresponding to the other end be connected with piston rod by hole, can the blocking high-pressure oil inlet and the cavity of corresponding regulating piston between hydraulic oil exports by the corresponding matching of spiral back-up ring by spheric seating, packing ring and hole.
Be provided with an O type circle between the connecting part of described protective cap and piston guide cover.One end of the corresponding contiguous protective cap of described piston guide cover is provided with the 2nd O type circle.
Described piston rod has axle-steel silk back-up ring corresponding to stretching into an end cover of adjusting in screw.Described piston guide cover is equipped with piston ring corresponding to the side that induced pressure interface, side direction mesopore and unloading port are set, and described piston ring set puts in piston guide.
The axis of described piston guide cover and the axis of regulating piston and protective cap are located along the same line, and the axis of the axis of spool and piston rod and piston guide cover is located along the same line.Described regulating piston is connected with the variable displacement pump swash plate corresponding to piston guide, overlapping the other end be connected.
Advantage of the present invention: the piston guide cover is connected with the variable displacement pump swash plate by regulating piston, when by the induced pressure interface, injecting high pressure oil, spool is mobile in the piston guide cover, spool and side direction mesopore and unloading port's corresponding matching, high pressure oil flows out by the side direction mesopore and passes through the high pressure oil import and flows in regulating piston, high pressure oil acts on spheric seating, and changes the inclination angle of variable displacement pump swash plate by regulating piston, changes the flow of variable displacement pump; When the elastic force of high pressure oil and big spring and little spring balances each other, regulating piston and piston guide cover, in steady state, can access stable pressure and flow; Can access required pressure and flow by the position of adjusting regulating piston, regulate the position of adjusting screw simultaneously, can obtain corresponding the performance curve of pressure-flow, make the performance curve of pressure-flow of oil hydraulic pump be similar to hyperbola, take full advantage of motive force, compact structure, the efficiency of raising hydraulic system, the energy consumption of reduction hydraulic system.
The accompanying drawing explanation
The structural representation that Fig. 1 is the present invention and variable displacement pump swash plate corresponding matching.
Fig. 2 is the another kind of view that regulating piston of the present invention matches with the piston guide inner room.
Fig. 3 is use state schematic diagram of the present invention.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Fig. 1 ~ Fig. 3: the present invention includes regulating piston 1, joiner 2, packing ring 3, piston rod 4, spool 5, piston guide cover 6, the first spring seat 7, press-on pins 8, adjust screw 9, adjust screw-nut 10, clamping bolt 11, clamping bolt nut 12, protective cap 13, axle-steel silk back-up ring 14, big spring 15, the second spring seat 16, little spring 17, the one O type circle 18, piston ring 19, spiral back-up ring 20 for hole, spheric seating 21, steel ball 22, check valve spring 23, variable displacement pump swash plate 24, hydraulic oil through hole 25, side direction mesopore 26, high pressure filler opening 27, the 2nd O type circle 28, induced pressure interface P and the T of unloading port.
As depicted in figs. 1 and 2: described constant power valve comprises piston guide cover 6, and an end of described piston guide cover 6 is provided with the protective cap 13 be fastenedly connected, and the other end is provided with regulating piston 1.Piston guide cover 6 stretches in regulating piston 1 corresponding to the end be connected with regulating piston 1, and can relatively move with regulating piston 1.The axis of regulating piston 1, piston guide cover 6 and protective cap 13 is located along the same line; And be connected with variable displacement pump swash plate 24 by regulating piston 1, promote variable displacement pump swash plate 24 by regulating piston 1, make the inclination angle of variable displacement pump swash plate 24 change, thereby can change the variable pump delivery.Piston guide cover 6 is connected by an O type circle 18 with 13 of protective caps.Simultaneously, piston guide cover 6 ends corresponding to contiguous protective cap 13 are provided with the 2nd O type circle 28, and described the 2nd O type circle 18 is enclosed within piston guide cover 6 corresponding step places.The outer wall of piston guide cover 6 is provided with induced pressure interface P, side direction mesopore 26 and the T of unloading port that connects piston guide cover 6; described side direction mesopore 26 is between induced pressure interface P and the T of unloading port; the contiguous regulating piston 1 of induced pressure interface P, the contiguous protective cap 13 of the T of unloading port.All overlap piston ring 19 is arranged corresponding to contiguous regulating piston 1 one sides at induced pressure interface P, side direction mesopore 26 and the T of unloading port.
Be provided with spool 5 in piston guide cover 6, in described spool 5, be provided with piston rod 4, the axis of the axis of described piston rod 4 and spool 5 and piston guide cover 6 is located along the same line.Spool 5 can overlap 6 interior movements in piston guide, and spool 5 can overlap induced pressure interface P, side direction mesopore 26 and the corresponding cooperation of the T of unloading port on 6 with piston guide.When by induced pressure interface P, to piston guide, overlapping 6 interior injection high pressure oil, can promote spool 5 and overlap 6 interior movements in piston guide, and can shutoff or open side direction mesopore 26 and the T of unloading port on piston guide cover 6, and spool 5 can overlap 6 corresponding matching with piston guide, make piston guide cover 6 and 1 of regulating piston relatively move.The two ends of piston rod 4 are stretched into respectively in protective cap 13 and regulating piston 1.
Piston guide cover 6 is corresponding to being provided with the first spring seat 7 in the end be connected with protective cap 13, described the first spring seat 7 is enclosed within on piston rod 4, and is connected with the end of spool 5 corresponding to contiguous protective cap 13.By the first spring seat 7, the adjustment spring that resets is installed on piston rod 4, the described adjustment spring that resets comprises big spring 15 and little spring 17.Adjusting spring by resetting can balance each other with the active force of high pressure oil to spool 5, makes constant power valve can keep a kind of steady state.For the described adjustment spring that resets can be installed; piston rod 4 is provided with clamping bolt 11 corresponding to the end of stretching in protective cap 13; centre area in described clamping bolt 11 is provided with through hole; described through hole is connected with the hydraulic oil through hole 25 in piston rod 4, and described hydraulic oil through hole 25 distributes and connects piston rod 4 along the axis of piston rod 4.Clamping bolt 11 is provided with the adjustment screw 9 be fastenedly connected, and clamping bolt 11 is fastenedly connected by clamping bolt nut 12 and adjustment screw 9.Adjust screw 9 and be provided with adjustment screw-nut 10; Big spring 15 is positioned at the first spring seat 7 and adjusts 9, screw, and an end of big spring 15 is connected with the first spring seat 7, and the other end is enclosed within to be adjusted on screw 9, and positions by the adjustment screw-nut 10 of adjusting on screw 9.Simultaneously, adjust in screw 9 and be provided with the second spring seat 16, little spring 17 is installed on piston rod 4 by the first spring seat 7 and the second spring seat 16.The second spring seat 16 is connected with clamping bolt 11 by press-on pins 8 corresponding to the other end be connected with little spring 17, thereby can carry out supporting and location to the second spring seat 16.Described piston rod 4 has axle-steel silk back-up ring 14 corresponding to stretching into an end cover of adjusting in screw 9, and described axle-steel silk back-up ring 14 is positioned at clamping bolt 11 and adjusts between the positioning step of screw 9, adjusts screw 9 and is connected with piston rod 4 by positioning step.
Regulating piston 1 is provided with high pressure oil import 27, regulating piston 1 is provided with hydraulic oil outlet L corresponding to the other end away from piston guide cover 6, described high pressure oil import 27 connects regulating piston 1, hydraulic oil outlet L distributes perpendicular to the axis of regulating piston 1, and hydraulic oil outlet L can be connected with the cavity in regulating piston 1.In order to promote variable displacement pump swash plate 24 by regulating piston 1, be provided with spheric seating 21 in described regulating piston 1, described spheric seating 21 is positioned at hydraulic oil outlet L and 27 of high pressure oil imports, and contiguous hydraulic oil exports L.Spheric seating 21 is spherical shape, and spheric seating 21 uses spiral back-up ring 20 that packing ring 3 is installed corresponding to an end of adjacent piston guide sleeve 6 by hole; Spheric seating 21 by packing ring 3 and hole with spiral back-up ring 20 corresponding matching can blocking high-pressure oil inlet 27 with hydraulic oil outlet L between the cavity of regulating piston 1, avoid the high pressure oil entered from high pressure oil import 27 from hydraulic oil outlet L outflow.
Piston rod 4 is corresponding to the end of stretching into regulating piston 1 through the rear contiguous hydraulic oil outlet L of spheric seating 21, and the hydraulic oil through hole 25 in described piston rod 4 is corresponding with hydraulic oil outlet L, and hydraulic oil outlet L can be connected with hydraulic oil through hole 25.After hydraulic oil through hole 25 and hydraulic oil outlet L is communicated with, the hydraulic oil piston rod 4 in can export L inflow and hydraulic oil by hydraulic oil and export in the one-way valve that L is connected.Piston rod 4 is corresponding to being provided with joiner 2 through in the end of spheric seating 21, and an end of described joiner 2 stretches in piston rod 4, and the other end is positioned at hydraulic oil outlet L.Be provided with check valve spring 23 in connector 2, an end of described check valve spring 23 is connected with regulating piston 1, the corresponding cooperation of steel ball 22 that the other end is interior with piston rod 4.Steel ball 22 is positioned at the end of hydraulic oil through hole 25, by the connecting path between steel ball 22 energy liquid for plugging force feed through holes 25 and hydraulic oil outlet L.When the hydraulic fluid pressure in piston rod 4 is greater than the elastic force of check valve spring 23, steel ball 22 is pushed to hydraulic oil outlet L mono-side, thereby the hydraulic oil in piston rod 4 can export L by hydraulic oil, flows out.
As shown in Fig. 1 ~ Fig. 3: constant power valve of the present invention, for volume adjustable hydraulic pump, due to described constant power valve small volume, is integrated in it on variable displacement pump.Regulating piston 1 is connected with variable displacement pump swash plate 24; By the induced pressure interface, P connects high pressure oil.When the high pressure oil entered from induced pressure interface P enters 5 of piston guide cover 6 and spools, promote spool 5 at piston guide cover 6 to moving away from regulating piston 1 direction.When spool 5 after piston guide is overlapped 6 interior motions, spool 5 and side direction mesopore 26 and the corresponding cooperation of the T of unloading port, high pressure oil can flow out by side direction mesopore 26, the T of unloading port is closed.The high pressure oil flowed out by side direction mesopore 26 enters in regulating piston 1 by the high pressure oil import 27 on regulating piston 1 by one-way valve.The high pressure oil entered after regulating piston 1 flows out because spheric seating 21, packing ring 3 and hole can not export L from hydraulic oil with spiral back-up ring 20, and promote regulating piston 1 to the direction motion of overlapping 6 away from piston guide by spheric seating 21, the high pressure oil in regulating piston 1 can promote piston guide cover 6 to moving away from regulating piston 1 simultaneously.Promote variable displacement pump swash plate 24 when regulating piston 1 and change corresponding inclination angles under the high pressure oil effect, simultaneously and the active force of 17 of big spring 15 and little springs while balancing each other, whole constant power valve is in steady state, thereby can obtain a stable pressure and flow.The active force that enters the hydraulic oil generation in piston rod 4 acts on steel ball 22, when the active force on acting on steel ball 22 is greater than the elastic force of check valve spring 23, steel ball 22 thrust hydraulic oil through holes 25, thereby the hydraulic oil in piston rod 4 exports L by hydraulic oil to flow out, flow in the one-way valve be connected with hydraulic oil outlet L.In Fig. 1, be the state of constant power valve when 0 discharge capacity, Fig. 2 is the state of constant power valve when maximum pump discharge.When the position to regulating piston 1 is regulated, can access the free position between constant power valve maximum pump discharge and 0 discharge capacity, reach the variable pump delivery is accomplished to stepless variation.When regulating adjusting screw 9, big spring 15 and the corresponding reset response power of little spring 17 can be regulated, thereby the performance curve of pressure-flow of variable displacement pump can be changed, make variable displacement pump can adapt to different job requirements.When stopping injecting high pressure oil to induced pressure interface P, spool 5 and piston guide cover 6 reset under big spring 15 and little spring 17 effects, and high pressure oil is by the T of unloading port emptying, and constant power valve 0 displacement condition that resets, be convenient to use next time.
Piston guide cover 6 of the present invention is connected with variable displacement pump swash plate 24 by regulating piston 1, when by induced pressure interface P, injecting high pressure oil, spool 5 overlaps 6 interior movements in piston guide, spool 5 and side direction mesopore 26 and the T of unloading port corresponding matching, high pressure oil flows out by side direction mesopore 26 and passes through high pressure oil import 27 and flows in regulating piston 1, high pressure oil acts on spheric seating 21, and changes the inclination angle of variable displacement pump swash plate 24 by regulating piston 1, changes the flow of variable displacement pump; When the elastic force of high pressure oil and big spring 15 and little spring 17 balances each other, regulating piston 1 and piston guide cover 6, in steady state, can access stable pressure and flow; Can access required pressure and flow by the position of adjusting regulating piston 1, regulate the position of adjusting screw 9 simultaneously, can obtain corresponding the performance curve of pressure-flow, make the performance curve of pressure-flow of oil hydraulic pump be similar to hyperbola, take full advantage of motive force, compact structure, the efficiency of raising hydraulic system, the energy consumption of reduction hydraulic system.
Claims (10)
1. a constant power valve is characterized in that: comprise piston guide cover (6), the outer wall of described piston guide cover (6) is provided with induced pressure interface (P), side direction mesopore (26) and the unloading port (T) that connects described piston guide cover (6); One end of described piston guide cover (6) is provided with the protective cap (13) be fastenedly connected, and piston guide cover (6) stretches in regulating piston (1) corresponding to the other end be connected with protective cap (13), and can in regulating piston (1), move; Be provided with spool (5) in piston guide cover (6), be provided with piston rod (4) in described spool (5), spool (5) can in piston guide cover (6), move and with piston guide cover (6) on induced pressure interface (P), side direction mesopore (26) and unloading port (T) corresponding matching; The two ends of piston rod (4) are stretched into respectively in protective cap (13) and regulating piston (1); Piston guide cover (6) is provided with the first spring seat (7) in the corresponding end be connected with protective cap (13), and described the first spring seat (7) is enclosed within piston rod (4) above and contacts with the end of spool (5); Piston rod (4) has clamping bolt (11) corresponding to the end cover stretched in protective cap (13), described clamping bolt (11) is provided with the adjustment screw (9) be fastenedly connected, and between described adjustment screw (9) and the first spring seat (7), is provided with the adjustment spring that resets; Regulating piston (1) is provided with high pressure oil import (27), be provided with spheric seating (21) between the hydraulic oil outlet (L) of high pressure oil import (27) and regulating piston (1) end, described spheric seating (21) is positioned at regulating piston (1), and is complementary with the cavity in regulating piston (1); Piston rod (4) corresponding to stretch into end in regulating piston (1) through spheric seating (21) and with the corresponding cooperation of spheric seating (21), be provided with the hydraulic oil through hole (25) distributed along piston rod (4) axis in piston rod (4), described hydraulic oil through hole (25) can export with hydraulic oil (L) and be connected; Piston rod (4) is provided with joiner (2) corresponding to the end of stretching into regulating piston (1), and an end of described joiner (2) stretches in piston rod (4), and it is interior and corresponding with hydraulic oil outlet (L) that the other end stretches into regulating piston (1); Be provided with check valve spring (23) in joiner (4), an end of described check valve spring (23) is connected with regulating piston (1), the other end and the interior corresponding cooperation of steel ball (22) for liquid for plugging force feed through hole (25) of piston rod (4).
2. constant power valve according to claim 1, it is characterized in that: the described adjustment spring that resets comprises big spring (15) and little spring (17), it is upper that one end of described big spring (15) is enclosed within the first spring seat (7), and the other end is installed on adjustment screw (9) by being positioned at the adjustment screw-nut (10) of adjusting on screw (9); Adjust in screw (9) and be provided with the second spring seat (16), it is upper that described the second spring seat (16) is enclosed within piston rod (4), and described little spring (17) is installed on piston rod (4) by the first spring seat (7) and the second spring seat (16); The second spring seat (16) is connected with clamping bolt (11) by press-on pins (8) corresponding to the other end be connected with little spring (17).
3. constant power valve according to claim 1 is characterized in that: described clamping bolt (11) by clamping bolt nut (12) with adjust screw (9) and be fastenedly connected.
4. constant power valve according to claim 1, it is characterized in that: described spheric seating (21) is equipped with packing ring (3) corresponding to the other end be connected with piston rod (4) by hole spiral back-up ring (20), by spheric seating (21), packing ring (3) and hole, by the corresponding matching of spiral back-up ring (20), can blocking high-pressure oil inlet (27) with hydraulic oil, exports the cavity of corresponding regulating piston (1) between (L).
5. constant power valve according to claim 1, is characterized in that: be provided with an O type circle (18) between the connecting part of described protective cap (13) and piston guide cover (6).
6. constant power valve according to claim 1 is characterized in that: an end of the corresponding contiguous protective cap of described piston guide cover (16) (13) is provided with the 2nd O type circle (28).
7. constant power valve according to claim 1 is characterized in that: described piston rod (4) has axle-steel silk back-up ring (14) corresponding to stretching into an end cover of adjusting in screw (9).
8. constant power valve according to claim 1, it is characterized in that: described piston guide cover (6) is equipped with piston ring (19) corresponding to the side that induced pressure interface (P), side direction mesopore (26) and unloading port (T) are set, and described piston ring (19) is enclosed within on piston guide cover (6).
9. constant power valve according to claim 1; it is characterized in that: the axis of the axis of described piston guide cover (6) and regulating piston (1) and protective cap (7) is located along the same line, and the axis of spool (5) and piston rod (4) and the axis of piston guide cover (6) are located along the same line.
10. constant power valve according to claim 1, it is characterized in that: described regulating piston (1) is connected with variable displacement pump swash plate (24) corresponding to the other end be connected with piston guide cover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104309595A CN102425541B (en) | 2011-12-20 | 2011-12-20 | Constant power valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104309595A CN102425541B (en) | 2011-12-20 | 2011-12-20 | Constant power valve |
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| CN102425541A CN102425541A (en) | 2012-04-25 |
| CN102425541B true CN102425541B (en) | 2013-12-04 |
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| CN2011104309595A Active CN102425541B (en) | 2011-12-20 | 2011-12-20 | Constant power valve |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661299A (en) * | 2012-05-14 | 2012-09-12 | 三一汽车起重机械有限公司 | Self-weight amplitude-falling constant-power control valve and crane |
| CN104454489A (en) * | 2014-12-04 | 2015-03-25 | 中航力源液压股份有限公司 | Integrated compact type constant power variable device |
| CN105156378B (en) * | 2015-08-31 | 2017-03-22 | 苏州萨伯工业设计有限公司 | Variable control device of hydraulic pump and control method thereof |
| CN105156377B (en) * | 2015-08-31 | 2018-01-05 | 苏州萨伯工业设计有限公司 | A kind of output flow control device of hydraulic pump |
| MX2018006025A (en) * | 2015-11-15 | 2018-08-01 | Eaton Intelligent Power Ltd | Hydraulic pump control system. |
| CN106351995B (en) * | 2016-11-16 | 2018-07-24 | 西安航空动力控制科技有限公司 | A kind of hyperbolic change spring rate mechanism |
| CN109078252A (en) * | 2018-07-03 | 2018-12-25 | 蚌埠崇迪生物科技有限公司 | A kind of check valve for medical drainage pipe fixing device |
| CN109595221B (en) * | 2019-01-29 | 2023-11-21 | 青神格林维尔流体动力控制技术有限公司 | Testing device and testing method for constant-power valve |
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| JP2007270862A (en) * | 2006-03-30 | 2007-10-18 | Okamura Corp | Valve device for torque converter with transmission |
| JP4670844B2 (en) * | 2007-07-19 | 2011-04-13 | トヨタ自動車株式会社 | Hydraulic device |
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