CN1262778C - Hydraulic hybrid accumulator shut-off valve - Google Patents

Abstract

A hydraulic accumulator is equipped with a novel shut-off valve. The shut off-valve includes a valve body having a cylindrical hollow with a valve seat surrounding one end. The main piston including a piston head has a central opening and is slidably mounted within the cylindrical hollow of the valve body. A poppet valve has a valve head which mates with the valve seat and a valve stem which extends through the central opening of the piston to guide axial movement of the poppet valve relative to the piston. A spring is mounted between the valve head and the main piston head for urging the valve head away from the piston head. A control valve moves the piston relative to the valve body between open and closed positions responsive to signals from a computer which signals valve closing upon determination that flow rate through the valve exceeds a maximum period. The spring between the poppet valve head and the piston head exerts a force approximately equal to that of a pressure drop across the poppet valve at a predetermined maximum flow rate.

Description

Hydraulic pressure hybrid energy-storing device stop valve and adopt the hydraulic pressure hybrid energy-storing device of this stop valve

Technical field

Thereby predominant use of the present invention is the discharging that improves the efficient reduction greenhouse gases of motor vehicle.More particularly, the field of the invention is the hybrid vehicle transmission system, and this vehicle is the transmission system that an oil hydraulic motor combines with an explosive motor with transmission system at least.

Background technique

Hydraulic pressure hybrid motor vehicles use accumulator is stored mechanical energy that reclaims and/or the too much energy that produces from motor from abrupt deceleration vehicle.See also U. S. Patent 5,495, the relevant narration of in hydraulic hybrid vehicle, using the details of accumulator in No. 912 and the U.S. Patent Application Serial Number 09/479,844 (in the trial).Yet, in using the hydraulic pressure hybrid powertrain system, to high pressure liquid stream, flow in the control of flowing out accumulator and still have safety problem.

Traditional accumulator has several different designs, wherein, a kind of is the piston accumulator, in the piston accumulator, the piston in a cylindrical shape accumulator container separates hydraulic fluid and gas (normally nitrogen), thereby this nitrogen is compressed stored energy by fluid is flowed in the container, another kind is a capsule formula accumulator, wherein use the resilient bladder body so that hydraulic fluid and gas are separated, also having a kind of is the barrier film accumulator, wherein uses a barrier film so that hydraulic fluid and gas are separated.

Fig. 1 shows the fluid input of capsule formula accumulator 10 of a prior art and the sectional view of valve end.This capsule formula accumulator is one to have the cylindrical vessel of dome-shaped end.This high-voltage energy storage device that is used for hydraulic hybrid vehicle, pressure are generally up to 5000 pounds/inch ²(psi).Hydraulic fluid pumps into and flows out from accumulator through port 11.Liquid is walked around the liquid chamber 13 that poppet valve 12 flows into accumulator.The wall 14 of accumulator must have enough intensity to hold high-pressure liquid safely.Gas (normally nitrogen) once overcompression is contained in the elastomeric bladder 15 of sealing.One spring 16 is opened to carry out common running valve 12.Valve assembly 17 if necessary, can take off from accumulator.For the accumulator of 5000psi, the gas in the capsule 15 fluid in office usually is compressed to 1,600～2 before being pumped to accumulator in advance, can reach maximum so that be stored in the interior energy of accumulator between the 000psi.When allow pressurized gas enter capsule 15 by the valve (not shown) at the other end capsule is boosted when middle, elastomeric bladder 15 expands, and withstands on the poppet valve 12 pressure spring 16 and valve 12 cuts out.After valve 12 was closed, capsule 15 was prevented from pushing fluid flow port 11 and prevents that this capsule from breaking.Thereby people's name of " anti-extrusion valve " of having given valve 12, because preventing capsule 15 exactly, the design function of valve 12 pushed fluid flow port 11.When the fluid through port 11 of pre-inflation pressure pumped in being higher than capsule, valve 12 was opened by force, and fluid flows into the gas in chamber 13 compression bag 15 and the capsule.When enough fluids be pumped to chamber 13 the gas compression in the capsule 15 when the 5000psi, the volume of gas and capsule drops to the about about 1/3 of original volume, big energy just is stored among the compressed gas.When the driver of vehicle needed power, liquid can flow to oil hydraulic motor to promote vehicle from accumulator.When liquid when accumulator comes out, capsule 15 expands.If liquid continues to be drawn out of, when pressure is reduced to pre-inflation pressure in the capsule 15, capsule 15 will expand and withstand valve 12, thereby valve 12 cuts out, and stop liquid further to be extracted out, and prevent that capsule 15 is extruded.The liquid that flows out in 16 prevention accumulators of spring is cut-off valve 12 prematurely.

Anti-extrusion valve assembly 17 is worked better in the application of hydraulic energy storage device, yet, when being used for hydraulic hybrid vehicle, this accumulator to add other valve function.In prior art, described other valve function can only be finished or provides with other valve assembly.

Summary of the invention

Therefore, an object of the present invention is to improve the control that high pressure liquid is flowed into and flows out the accumulator in the transmission system, thereby improve the Security of hydraulic pressure hybrid powertrain system by providing once improved accumulator stop valve.

The invention provides a kind of device of uniqueness, fluid content approaches the gas of zero-sum preliminary filling (for example to the accumulator of 5000psi in capsule, the gas of Jia Ruing has the pressure of 2000psi in advance) when being about to that capsule evicted out of accumulator, this device has and prevents function that capsule is squeezed out.

More particularly, the invention provides a kind of stop valve that is used for the hybrid vehicle driveline system, this stop valve comprises: a valve body, this valve body have a cylindrical cavity, a valve seat around cylindrical cavity one end; The valve rod of one poppet valve (also claiming poppet valve), this valve rod has head (valve head), and it and valve seat are complementary when closed position; Be characterized in that comprise that also one is slidably mounted on piston wherein, this piston comprises a piston head, has the center drilling that holds the poppet valve valve rod on this piston head, is used to guide the axial motion of poppet valve with respect to piston; One spring, it is installed between the head and piston head of poppet valve, and open position arrives to order about valve head to leave piston; Piston driver, for example, a control valve is used to make piston to move with respect to valve body between open position and closed position.

In a preferred embodiment, spring between poppet valve head and piston head has the compression intensity of force that equals the pressure drop of valve two ends in the time of being provided at a predetermined Peak Flow Rate, thereby the flow velocity that makes this valve can be exceeded this predetermined Peak Flow Rate is closed, thus for the invention provides the characteristic of what is called " fluid safety fuse cutout ".

In a preferred embodiment, between piston and valve body, form a doughnut, therein, pressure is controlled by piston driver.This piston has a flange at least, and it extends into doughnut, separate this doughnut and be sealed in the inwall of this valve body.This piston flange with doughnut be divided into second Room that is communicated with consistently with the low pressure liquid storage tank and one with piston controller first Room that is connected of control valve for example, be used for allowing piston to move between its low pressure liquid storage tank of closed position at the high-voltage power supply that piston is moved to an open position and a pressure of first Room and change.Preferably, control valve is a normally close valve, and when the normally closed position of control valve at it, poppet valve also cuts out.In a preferred embodiment, this piston has two flanges, and they extend into this doughnut to form first, second and the 3rd Room, and wherein, the 3rd Room is to be connected with the cylindrical cavity of piston consistently.

Preferably, stop valve of the present invention has at least one detector, is used to measure the flow velocity (" cylindrical cavity ") by piston cavity inside.Flow velocity can use the two or more detectors that are provided with along glide path (pipeline) compartment of terrain to measure, and purpose is to measure the pressure that can be used for calculating flow velocity to fall.One electronic control unit or computer receive the signal of self-detector, go out actual flow velocity and the flow velocity of this actual flow velocity and instruction is compared according to calculated signals.If actual flow velocity surpasses the flow velocity of instruction, this electronic control unit just sends a command signal and gives control valve to close poppet valve.

In a preferred embodiment, the present invention also provides the new characteristics that are referred to as " fluid safety fuse cutout " here.If the egress line of accumulator disconnects or opens mistakenly, and liquid stream surpasses a predetermined maximum speed, and valve just cuts out automatically.In this embodiment, the spring that maintaining valve is opened is through calibration, and when flow velocity surpassed predetermined admissible Peak Flow Rate, it just allowed valve to close.

The present invention also provides the quick closedown of valve and opening fast of valve.After obtaining or responding e-command, valve can cut out very soon, generally just can close less than 50 milliseconds time.If COMPUTER DETECTION is higher than the flow velocity of instantaneous expection to the flow velocity that flows out, hint has to leak in system and takes place, and should leak when triggering the closing function of urgent " fluid safety fuse cutout ", and valve just can cut out by instruction.The flow velocity that flows out and is constantly grasped in computer control, and the pressure that goes out two positions on the circuit by convection current compares (to measure and the associated pressure drop of flow velocity) or passes through other flow metering devices, and continuously the flow velocity of instruction and the flow velocity that records is compared.Surpass the flow velocity that is instructed if record flow velocity, computer cuts out instruction valve.When system closing, for example when an electric switch cut out, computer also instruction valve cut out.The instruction of closing reaches the effect of closing soon, because when valve is opened, the pressure of valve both sides equates basically, as long as and the power when closing can overcome the friction of valve and provide desirable acceleration just passable.

Opening of (when the pressure in valve downstream has descended) valve need very big driving force after the time surpasses a few minutes, because not only will overcome the oeverall quality of friction and acceleration valve assembly, also must overcome the power of the pressure in the accumulator on the accumulator side that acts on valve.Under opposite extreme situations, when downstream pressure reaches its minimum (for example 100psi) and the pressure of accumulator when reaching its peak (for example 5000psi) needs very big power just can open valve.For example, if when the poppet valve surface area is one square, and pressure difference is when being 4900psi, and driver just must overcome 4900 pounds extra power could movement of valve.And the present invention's needed driving force when opening valve is much smaller, because there is a parallel circuit accumulator to be connected to the downstream side of main valve, and contain a little close/open valve, this little close/open valve earlier by instruction unpack so that the pressure in main valve downstream and the pressure in the accumulator obtain equilibrium.Fluid in this little parallel circuit just requires the liquid stream of supercharging downstream volume, and it is very little.When the pressure of the pressure in main valve downstream and accumulator is identical, driving force just only need be enough to overcome friction and by desired speed can the acceleration valve assembly the power of oeverall quality just passable.

In lifting valve base, used a kind of good O V-shaped ring (or similar sealing material) so that the reliable sealing of zero leakage to be provided among the present invention.This has prevented accumulator owing to there is not to seal reliably the unfavorable condition that the low speed leakage takes place and lose pressure at leisure.

Description of drawings

Fig. 1 is the partial cross section figure of cryptomere accumulator, has been equipped with the stop valve of prior art in this accumulator;

Fig. 2 is the partial cross section figure of cryptomere accumulator, and this accumulator has been equipped with by a stop valve of first embodiment of the invention and an electronic control unit of combining and a control valve;

Fig. 3 is the partial cross section figure of a cryptomere accumulator, wherein has been equipped with a stop valve and an electronic control unit of combining and a control valve according to second embodiment of the invention;

Fig. 4 is the sectional view according to the stop valve of third embodiment of the invention, wherein has been used in combination an electronic control unit and a control valve;

Fig. 5 is the sectional view according to the stop valve of the fourth embodiment of the present invention, wherein has been used in combination an electronic control unit and control valve;

Fig. 6 is the sectional view that is equipped with the capsule formula accumulator of stop valve according to the fifth embodiment of the present invention, wherein has been used in combination an electronic control unit and a control valve.

Embodiment

The present invention can be applied to the accumulator of all design styles, but the preferred embodiment of narrating below illustrates the present invention as an example with capsule formula accumulator 10.Illustrated among Fig. 2 and used the valve assembly 21 that combines, it is as first embodiment of the present invention.This valve assembly 21 has replaced the anti-extrusion valve assembly 17 of prior art among Fig. 1.Poppet valve 22 among Fig. 2 and spring 23 have with Fig. 1 in poppet valve 12 and the same anti-extrusion function of spring 16.Yet the base portion of valve 22 is mounted in one slidably among the piston assembly 24.It is different with the valve 12 among Fig. 1, and the base portion of the valve 12 among Fig. 1 is fixed.More particularly, valve 22 comprises a head 22a and a 22b of bar portion, and the 22b of bar portion extends among the center hole 24b of piston crown 24a and does axial motion with pilot valve 22 with respect to piston crown 24a.

Slidably piston assembly 24 is slidably mounted in (hereinafter referred is " chamber 30 ") within the cylindrical cavity 30 of valve body 20.Slidably piston assembly 24 can accept to instruct by reduce mouthfuls 25 and chamber 26 in pressure and move to left from the system low-voltage that the system high pressure in mouth 31 and 32 is reduced to liquid storage tank 33, thereby cut-off valve 22.When CPU (central processing unit) 72 sent instruction cut-off valve 22, the electric power of control valve 27 (being commonly referred to normally close valve) stopped.Select a normally close valve can guarantee that as control valve 27 accumulator can end when losing electric power, this is a safe and reliable design feature.Because the pressure on two sides, valve 22 left and right sides equates when valve 22 is opened, perhaps near equate (unique difference be since fluid flow to or flow out that accumulator produces from simultaneously to the little pressure drop of another side), so assembly 24 will move to left and cut-off valve 22 rapidly.Chamber 38 is that through port 28 leads to low pressure liquid storage tank 33 all the time.29 of chambers are that through port 34 leads to accumulator downstream pressure in the chamber 30 all the time.Accumulator downstream pressure in the chamber 30 allows liquid stream flow through mouth 35 by safety check 36 preventions and flow to mouth 25 or low pressure liquid storage tank 33 (after the instruction cut-off valve).

One elastomeric seal 37 as the valve seat of poppet valve 22 with guarantee when valve 22 accept instruction and when closing from accumulator at all releasing.Zero leakage accumulator stop valve is very crucial to hydraulic hybrid vehicle, because the accumulator downstream pressure in chamber 30 is subjected to several influences that might have the valve (not shown) of low speed leakage easily, and accumulator must still keep-up pressure after vehicle is stopped using several weeks, will be used for starting the motor of vehicle and help the initial acceleration of vehicle because be stored in energy in the accumulator.

Spring 23 is calibrated to allow valve 22 " scram " when the flow that flows out from accumulator surpasses the needed peak rate of flow of vehicle.In case fall when reaching pressure that maximum can allow flow and falling from the right side of valve 22 to the pressure in the left side of valve 22, act on the elastic force that power that this pressure on valve 22 right sides falls will overcome spring 23 and begin cut-off valve 22.When valve 22 began to cut out, rising fell in pressure because flow velocity increases, and valve 22 is faced is the power of the increase that will be used to close, and this closes valve at a terrific speed.The function of this " safety fuse cutout valve " is the very important safety feature to hydraulic hybrid vehicle, because when the accumulator down-stream system breaks, can be cut off at the energy of accumulator stored.

The important safety feature of another that comprises among the present invention is the pressure of mouth 35 and the pressure at mouthful 32 places can be compared.This pressure difference with leave the accumulator flow rate of fluid and have coherence, this can compare with the flow velocity by vehicle computer (control unit for vehicle) instruction with in order in each powered vehicle constantly from the flow velocity that calculates.If when calculating the flow velocity of gained and surpassing the safety range flow velocity of a regulation of instruction, computer will move to the left side to piston assembly 24 slidably with cut-off valve 22.The effect of these characteristics is to check out little system leak (little leakage still is dangerous), can not allow flow to trigger the function of above-mentioned " safety fuse cutout valve " and this little system leak also reaches maximum.This whole slidably piston assembly 24 is shifted to the left side with respect to valve body 20 the mode of closing is different with " safety fuse cutout valve " function, and in " safety fuse cutout valve " function, just poppet valve 22 is shifted to the left side with respect to valve body 20.

After valve 22 is closed, the downstream pressure in the chamber 30 will begin to descend, and will increase at the accumulator pressure at mouth 31 places and the pressure reduction between the downstream pressure in the chamber 30.In order to reopen valve 22 and to overcome the power of the pressure difference at valve 22 two ends, originally needed a very large power to be added to the left side (this situation will be followed structure and other problems) of valve 22, and in the present invention, the pressure at valve 22 two ends just can very soon be opened valve 22 thereby need only with a much smaller power at first by equilibrium.When an instruction of opening valve 22 was sent, control valve 27 was opened with the lower pressure that will be connected to mouthfuls 25 and 35 from the accumulator high pressure of mouth 32.High pressure liquid stream makes chamber 26 superchargings and flows through chamber 29 and mouthfuls 34 to increase the accumulator downstream pressure in the chamber 30.High pressure in the chamber 26 acts on slidably on the piston assembly 24, and it is shifted to the right side.When the isostasy at pressure in the chamber 30 and 31 places, spring 23 is opened valve 22.

Valve assembly 21 also can be used for allowing hydraulic hybrid vehicle to work in hydrostatic pattern (when starting function 30 to produce when being higher than at the instantaneous downstream pressure that gets of 31 place's accumulators in the chamber).When the hydrostatic running of needs, valve 22 is cut out by instruction as described above.When the downstream pressure in the chamber 30 rises to above accumulator pressure 31, a clean power will act on the left side of valve 22, impel valve 22 trend open positions.Only need the appropriate area of selecting the piston in the chamber 29 to overcome this power, valve assembly 21 just can be carried out the running of the hydrostatic pattern of control well.When needing again to have the running of normal accumulator assistance, the downstream pressure in the chamber 30 will be reduced to the pressure near accumulator, and valve 22 will be opened as described above.

Fig. 3 shows second embodiment of the present invention.The anti-extrusion valve assembly 17 that valve assembly 41 wherein replaces among Fig. 1.Poppet valve 42 among Fig. 3 and spring 43 have with Fig. 1 in poppet valve 12 and spring 16 are the same anti-extrusion functions.Yet the base portion of valve 42 is installed in one slidably in the piston assembly 44, and is different with the valve 12 of the Fig. 1 that is fixed in base portion.

Slidably assembly 44 can be accepted instruction, by reducing the pressure in mouthful 45 places and the chamber 46, is reduced to the system low-voltage at liquid storage tank 53 places and moves to the left side, cut-off valve 42 from mouth 51 and 52 system high pressures.When sending the instruction of a cut-off valve 42, control valve 47 moves to position as shown in Figure 3.Because when valve 42 is opened, the pressure on face about valve 42 equates or near equating, assembly 44 cut-off valve 42 that will promptly move to left.Low pressure liquid storage tank 53 is led in chamber 58 through port 48 all the time.Comprise spring 59 in the chamber 58, this spring 59 applies elastic force and make it two cut-off valves 42 that move to left rapidly on assembly 44.Safety check 56 prevents that the accumulator downstream pressure in the chamber 50 from making liquid stream through port 55 flow to mouth 45 or low pressure liquid storage tank 53.One spring body Sealing 57 guarantees that to be instructed when valve 42 from the leakage of energy storage body be zero as the valve seat of poppet valve 42 when closing.

Spring 43 is calibrated, and can allow valve 42 " quick closedown " when the liquid stream that flows out from accumulator surpasses the needed peak rate of flow of vehicle.

After valve 42 is closed, the downstream pressure in the chamber 50 will begin to descend, and will rise at the accumulator pressure at mouth 51 places and the pressure difference between the downstream pressure in the chamber 50.When opening valve 42 again, the pressure at valve 42 two ends is balanced, so as long as can open valve 42 very soon once less relatively power.When the instruction of opening valve 42 was sent, control valve 47 was opened, and the high pressure of accumulator was connected to the lower pressure of mouth 45 and 55 from mouth 52.High-pressure liquid makes chamber 46 superchargings, and flows through mouth 54 to increase the accumulator downstream pressure in the chamber 50.High pressure in the chamber 46 acts on slidably on the piston 60, this slidably piston 60 be connected to firmly slidably on the assembly 44, the part of assembly 44 moves right it thereby therefore become slidably.When the pressure in the chamber 50 during with mouthfuls 51 isostasy, spring 43 is opened valve 42.

Fig. 4 shows valve assembly 61, and it is the 3rd embodiment of the present invention.The anti-extrusion function of poppet valve 62 and spring 63 is identical with poppet valve 12 and spring 16 among Fig. 1.But the base portion of valve 62 is installed in one slidably in the piston assembly 64.It is different with the valve 12 among Fig. 1, and the base portion of the valve 12 among Fig. 1 is fixed.More particularly, valve 62 comprises that the 62b of bar portion that a head 62a and extends into the center hole 64b among the piston head 64a moves axially with respect to piston head 64a with pilot valve 62.

Pressure in the contrary accumulators of spring 66 is offset to the right side to piston assembly 64 slidably.Slidably piston assembly 64 can accept to instruct by reduce mouthfuls 67 and chamber 67a in pressure, thereby be reduced to the system low-voltage of liquid storage tank 71 and be moved to left side cut-off valve 62 from the system high pressure of mouth 69 and 70 with respect to valve body 65.When CPU 72 sent an instruction cut-off valve 62, the electric power of control valve 73 (being commonly referred to as normally close valve) was interrupted.The same with foregoing embodiment, select a normally close valve for use for control valve 73 and can guarantee that accumulator can be switched off when losing electric power, thereby be called the characteristics of a safety design.Accumulator downstream pressure in the chamber 68 can prevent that by safety check 75 liquid stream through port 74 from flowing in 67.The valve seat of one elastomeric seal 76 as poppet valve 62 is provided.

Spring 63 is through calibration during with the maximum predetermined amount of flow value that allows valve 62 and surpass that vehicle needs at the flow that flows out from accumulator " closing rapidly with a bang ".

This 3rd embodiment also has the ability that the pressure with the pressure at mouth 74 places and mouthful 70 places compares.Pressure difference wherein has certain relation with the flow rate of fluid of leaving accumulator, can calculate flow velocity from this differential pressure gauge.Therefore, this flow velocity that calculates can compare to make the usefulness of powered vehicle constantly at each with the flow velocity of the computer order of vehicle.If the flow velocity that calculates the velocity ratio instruction of gained exceeds the safety coefficient of a regulation, CPU 72 just will instruct piston assembly slidably 64 will be closed valve 62 to moving to left.

When sending instruction unpack valve 62, control valve 73 be opened with the high pressure of accumulator from mouth 69 be connected to mouthfuls 67 and mouthfuls 74 than low pressure.High-pressure liquid rises the pressure of chamber 67a and flows through mouth 74 to increase the accumulator downstream pressure in the chamber 68.High pressure in the 67a of chamber acts on piston assembly 64 and the spring 66 so that piston assembly 64 is moved right.When the isostasy at pressure in the chamber 68 and 70 places, spring 63 is opened valve 62.

Different with above-mentioned all embodiments, wherein, poppet valve is resisted against 97 places on the right side of piston assembly 84 slidably a valve seat seals.And a poppet valve head 82c arranged among the 4th embodiment shown in Fig. 5, it seals seat 111 in against on the left side of piston assembly 84 slidably.This structure can allow slidably, and piston assembly 84 relatively is easy to left, and move (with respect to Fig. 2, all embodiments in 3,4) and the outside of 90 parts of the chamber in the accumulator structure.The diameter of the part of the chamber 90 within accumulator requires as much as possible little but still allows to have maximum liquid flowing speed and do not make us unacceptable high flow capacity loss (producing high pressure falls) so that to the collision of accumulator structure minimum as far as possible (that is to say, one big open mouthful requirement has the last one in around openings a structure).And piston assembly 84 is slidably placed the diameter that extends into accumulator and the Fig. 2 that can allow to make chamber 90 outside 90 parts of accumulator chamber, 3,4 compare can be less.But fundamental function and characteristics are similar to aforementioned all embodiments.When opening valve 82, pressure equalisation valve 87a (normally close valve) open and make in pressure and the chamber 90 in the chamber 89a of the downstream part of 111 place's valve base sealings in pressure equate.Valve 87b shifts to by the position of energizing, and through port 85 makes chamber 86 link to each other with lower pressure liquid storage tank 93.Slidably piston assembly 84 is shifted to the right side (position among Fig. 5) permission spring 83 and is opened valve 82, because the pressure between chamber 89a and 90 has obtained equilibrium.When cut-off valve 82, valve 87b degradedness (normally closed position), this closes and is used for chamber 86 through ports 85 are connected with the 92b of pumping chamber through port 91b.High pressure in the chamber 86 acts on the piston assembly 84 and it and shifts to a left side, and cut-off valve 82 is because the face seal of valve head 82c valve seat 111.Pressure in the chamber 90 is in the pressure of low-pressure liquid storage tank 93 all the time.

Fig. 6 shows the fifth embodiment of the present invention, wherein focuses on the equalization function of pressure.One traditional ball valve 121 is contained on the anti-extrusion valve assembly 122, fluid safety fuse cutout calibrating spring 123 wherein, and anti-extrusion fluid fuse poppet valve 124, the change of sealing 125 and accumulator (high pressure) gateway 126 is as previously mentioned described in the embodiment.When opening accumulator stop valve 121 (here being a ball valve), control valve 127 is (normally closed, be opened as shown in the figure), and from accumulator high pressure is offered the pressure of downstream port 128 with balanced ball 129 two ends at mouth 126 places, and against or the closing torque of antagonism spring 132 (or other close torque means) and open valve 121.When cut-off valve 121, control valve 127 is closed (as shown in the figure), does not have high pressure to driver 130, at this moment, and spring 132 cut-off valves 121.

Under the situation that does not deviate from spirit of the present invention and basic characteristics, the present invention also can implement with other form.Therefore, in all respects, all embodiments of the present invention are just in order to illustrate the present invention's usefulness, thereby the present invention never is limited to embodiment's scope.Scope of the present invention is as described in the appended claims rather than as all embodiments' of above narration scope.All intend being included within the protection domain of claim in every meaning that falls into claim and the scope and with all changes of claims equivalence.

Claims (24)

1. hydraulic pressure hybrid energy-storing device stop valve, it comprises:

One valve body, this valve body have a cylindrical cavity and a valve seat around described cylindrical cavity one end;

One poppet valve, it comprises a valve head, matches in closed position with described valve seat, and a valve rod that extends from described valve head;

It is characterized in that, also comprise:

One main piston, it comprises that one has the piston head of a center hole, this main piston is slidably mounted in the described cylindrical cavity; Described valve rod stretches into described center hole, moves axially with respect to described main piston to guide described valve member;

One is installed in the spring between described valve and the described main piston, impels this valve trend open position;

One piston running gear is used so that described main piston moves between open position and operating position with respect to described valve body.

2. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 1, wherein, described spring has can provide a compression intensity of force, and the pressure that this compressive force equals valve two ends when is scheduled to Peak Flow Rate falls, thereby this valve can cut out by a flow velocity that surpasses described predetermined peak flow rate (PFR).

3. hydraulic pressure hybrid energy-storing stop valve as claimed in claim 1 forms a doughnut between wherein said main piston and the described valve body, described piston running gear is being controlled the pressure in the described doughnut.

4. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 3, wherein said main piston has one first flange, it is sealed in described valve body and described doughnut is divided into first, second chamber, wherein said second Room is connected with a low pressure liquid storage tank consistently, described piston running gear is a control valve, it is connected with described first Room, with so that first Room can be communicated with a high-voltage power supply so that described piston is shifted to open position and be connected with a low pressure liquid storage tank and change to allow described piston to shift between the described closed position.

5. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 4, wherein, described control valve is a normally close valve, when described control valve is that described poppet valve is pent during at normally closed position.

6. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 4, wherein, described main piston has one second flange, and this second flange is separated out one the 3rd Room from second Room in described doughnut, and wherein, described the 3rd Room is to lead to cylindrical cavity consistently.

7. the stop valve of hydraulic pressure hybrid energy-storing device as claimed in claim 6, wherein, described the 3rd Room is connected with first Room and control valve by a safety check, and this safety check prevents that liquid stream from flowing to described first Room from cylindrical cavity.

8. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 4, wherein, described control valve is communicated with high-voltage power supply by a passage, this passage through described valve body to the far-end, high pressure, the extension mouth radially that lead to the valve body located at contiguous valve seat place.

9. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 1, wherein, described valve seat comprises the annular ring of an elastomeric seal.

10. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 1, wherein, described piston running gear is a control valve, and wherein, described stop valve also comprises:

At least one detector is used for measuring (detection) flow velocity by cylindrical cavity;

One electronic control unit is used to receive the signal of self-detector, will compare based on the flow velocity of the actual flow velocity and instruction of signal, if actual flow velocity surpasses the flow velocity of instruction, this control unit just sends an instruction and closes described poppet valve to control valve.

11. hydraulic pressure hybrid energy-storing device stop valve as claimed in claim 1, this valve also comprises:

One second piston, it links to each other with described main piston securely by a piston rod;

One forms the axial bore of a closed-chamber in the valve body of second piston slidably is installed, described second piston is divided into two locellus to described closed-chamber, one of them keeps being communicated with low pressure source, and another chamber can be made it to change between a described low pressure source and a high-voltage power supply by a control valve as described piston running gear.

12. the accumulator of a hydraulic pressure vehicle drive system, it comprises:

One case jar;

One cystidium, it is installed in the described case jar, contains fluid in the cystidium, described case jar form one around the fluid space of described cystidium and, a stop valve that is communicated with described fluid space, and comprising:

One valve body, this valve body has a cylindrical cavity, and a valve seat around described cylindrical cavity one end;

One poppet valve, it comprises a valve head, is complementary in operating position with described valve seat, and a valve rod that extends from described valve head;

It is characterized in that, also comprise:

One main piston, this main piston comprise that one has the piston crown of a center hole, and are slidably mounted in the described cylindrical cavity; Described valve head stretches into described perforate, does axial motion to guide described valve member with respect to main piston;

One spring, it is installed between described valve and the described main piston to impel described valve trend open position;

One piston running gear is used so that described main piston moves between the open and close position with respect to valve body.

13. accumulator as claimed in claim 12, wherein, described spring has certain intensity, it can provide one with the compressive force that equates across the pressure drop at described valve two ends when the predetermined Peak Flow Rate, thereby the fluid that can make described valve be exceeded described predetermined Peak Flow Rate is closed.

14. accumulator as claimed in claim 12 wherein, forms a doughnut between described main piston and described valve body, described piston operational devices is being controlled pressure in the described doughnut.

15. accumulator as claimed in claim 14, wherein, described main piston has one first flange, this first flange seal is separated into first and second Room in described valve body and in described doughnut, wherein said second Room is communicated with a low pressure liquid storage tank consistently, described piston running gear is a control valve that is communicated with first Room, be used to make described first Room with described case jar in fluid between be communicated with to set up described open position and to be communicated with to allow piston to shift between the described closed position and change with a low pressure liquid storage tank.

16. accumulator as claimed in claim 15, wherein, control valve is a normally close valve, and when described control valve was in normally closed position, described poppet valve was pent.

17. accumulator as claimed in claim 15, wherein, described piston has one second flange, and it is separated out one the 3rd Room from second Room in described doughnut, and wherein, described the 3rd Room is led to described cylindrical cavity consistently.

18. accumulator as claimed in claim 17, wherein, described the 3rd Room is closed valve with first Room and described control and is connected by a safety check, and described safety check prevents that liquid stream from flowing into described first Room from described cylindrical cavity.

19. accumulator as claimed in claim 15, wherein, described control valve is connected with fluid space in the described accumulator by a passage, and this passage leads to the far-end of the valve body that is adjacent to place, described valve seat place through described valve body to of fluid space radially extends mouthful.

20. accumulator as claimed in claim 12, wherein, described valve seat comprises an annular ring of an elastomeric seal.

21. accumulator as claimed in claim 12, wherein, described piston running gear is a control valve, and wherein, described stop valve also comprises:

At least one detector is used to detect the flow velocity by described cylindrical cavity;

One electronic control unit, be used to receive the signal of self-detector, be used for and will compare according to the actual flow velocity and instruction flow velocity of signal, if actual flow velocity surpasses described instruction flow velocity, this electronic control unit just sends a command signal and gives control valve to close described poppet valve.

22. accumulator as claimed in claim 12, it also comprises:

One passes through second piston that a piston rod links to each other with main piston securely;

One axial bore, it forms a sealing chamber in valve body, described second piston is slidably mounted in wherein, described second piston is separated into two cells with described sealing chamber, one of them keeps being communicated with a low pressure source, and another is then changed between described low pressure source and liquid fluid space as the control valve of described piston running gear by one.

23. a hydraulic pressure hybrid energy-storing device stop valve, it comprises:

One valve body, it has a cylindrical cavity, a valve seat, it is around an end of described cylindrical cavity;

One poppet valve, it has a valve head, matches in closed position with described valve seat;

One valve rod, it extends from described valve head;

It is characterized in that,

Described poppet valve also comprises a guide, and this guide has one and admits the center hole of described valve rod to move with the guiding poppet valve;

Described stop valve also comprises:

One first spring is installed between poppet valve and the guide, in order to impel this poppet valve trend open position;

One ball valve is rotatably installed between open position and the operating position and with described cylindrical cavity fluid and is communicated with;

One second spring, it is offset to described ball valve a direction rotation;

One fluid driver is used to make described valve in the second direction rotation opposite with first direction;

One control valve, it is communicated with described fluid driver, in order to selectively a high-pressure liquid is offered described fluid driver.

24. an accumulator that is used for the hydraulic pressure vehicle drive system, it comprises:

One case jar;

One cystidium, it is installed in the described case jar, and cystidium contains fluid, and described case jar forms a fluid space around described cystidium;

One stop valve, it is communicated with described fluid space, and comprises:

One poppet valve, it has a valve head, is complementary in operating position with described valve seat, a valve rod, it extends from valve head,

It is characterized in that,

Described poppet valve also comprises a guide, and this guide has the motion of the center hole of a receive valve stem with the guiding poppet valve;

Described stop valve also comprises:

One first spring, it is installed between described poppet valve and the described guide, in order to impel this poppet valve trend open position;

One ball valve is rotatably installed between open position and the closed position and with the cylindrical cavity fluid and is communicated with;

One second spring, it is offset to a direction rotation with described ball valve;

One fluid driver is used to make described valve in the second direction rotation opposite with a described direction; And

One control valve that is connected with described fluid driver is used for providing high-pressure liquid for described fluid driver selectively.

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