CN103507800A - Piezoelectric type oil way control valve and vehicle EHB - Google Patents
Piezoelectric type oil way control valve and vehicle EHB Download PDFInfo
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- CN103507800A CN103507800A CN201310453629.7A CN201310453629A CN103507800A CN 103507800 A CN103507800 A CN 103507800A CN 201310453629 A CN201310453629 A CN 201310453629A CN 103507800 A CN103507800 A CN 103507800A
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Abstract
The invention discloses a piezoelectric type oil way control valve and a vehicle EHB. The piezoelectric type oil way control valve comprises a piezoelectric element, a displacement amplification mechanism, a piston, a return spring, a valve core, a screw plug and a shell, wherein the piezoelectric element generates deformation in the axial direction by exerting an electric field, an output load pushes the piston to move, the displacement amplification mechanism comprises at least two stages of displacement amplification units, each stage of displacement amplification unit comprises a displacement amplification lever, a protrusion pint, a fixed hinge and a base, on the basis of the lever principle, the small amount of displacement of the piston is amplified, and the piston and the return spring jointly push the valve core to move to open or close an oil inlet and an oil outlet. The piezoelectric type oil way control valve is used as the oil inlet and returning control valve of the vehicle EHB, and the frequency and control precision of brake pressure adjustment of the EHB are improved. According to the piezoelectric type oil way control valve and the EHB, the brake performance, the economical performance and the safety performance of a vehicle can be improved.
Description
Technical field
The present invention relates to a kind of piezoelectric type oil passage control valve and vehicle electric hydraulic brake system, belong to vehicle brake technology field.
Background technology
Brake system is one of important component part of automobile, is directly connected to comprehensive vehicle performance and the security of the lives and property, comprises running brake, Parking Brake and additional brake.Running brake is automobile primary drg, generally adopts drum-type or disc type friction braking mode, and the kinetic energy of automobile, potential energy are converted into heat energy by friction, realizes the object of car deceleration or braking.Although conventional hydraulic formula, vapour-pressure type running brake can meet the requirements of existing brake legislation, exist speed of response slow, can not active adjustment, be not easy to the weak points such as integrated control, be not suitable for the demand for development of current automobile.
EHB (EHB) is a kind of in line control brake system, by brake pedal module, ECU electronic control unit, hydraulic control module etc., formed, cancelled being directly connected between brake pedal and brake wheel cylinder, take electric wire as information transmission media, control unit is controlled actuating unit action according to brake pedal position sensor signal identification of driver braking intention, the braking liquid that high hydraulic brake fluid in energy storage is entered in wheel cylinder or wheel cylinder is got back to reservoir, realizes the control to wheel braking force.EHB system has compact conformation, superior performance and is easy to the features such as integrated control, has made up the deficiency in traditional braking system architecture principle, is representing one of development tendency of running drg.At present, EHB system generally adopts electromagnetic valve as actuating unit, by magnet coil energising or power-off, spool being moved, is switched on or switched off hydraulic tubing.But energising, the power-off of magnet coil exist hysteresis, affect the pressure controlled dynamic characteristics of EHB Braking system, and then affected control accuracy and the deceleration and stopping performance of EHB system.
Piezoelectric type oil passage control valve based on inverse piezoelectric effect has high dynamic response performance, can improve frequency and control accuracy that brake-pressure regulates.But, to so far, also rarely have the EHB of mentioning with piezoelectric type oil passage control valve.In addition, braking energy regeneration is the important measures that automobile is saved the energy, and emergency brake function is a subject matter of line control brake system always.
Summary of the invention
Technical matters to be solved by this invention is the defect that overcomes prior art, and a kind of piezoelectric type oil passage control valve is provided, and it can improve the pressure controlled frequency of EHB Braking system and control accuracy, thereby improves dynamic response performance and the deceleration and stopping performance of EHB system.
In order to solve the problems of the technologies described above, the technical scheme that the present invention takes is: a kind of piezoelectric type oil passage control valve, it comprises displacement amplifying mechanism, plug screw, housing, piston, pull back spring, spool and thereby it is created in the piezoelectric element that mechanically deform on spool axial direction forms the axial propelling thrust that the party makes progress when applying external electric field, plug screw is threaded connection on housing, piston and piezoelectric element are positioned at housing, displacement amplifying mechanism comprises at least two-stage displacement amplifying unit, every grade of displacement amplifying unit comprises displacement amplification lever, fixed hinge and salient point, the fixed end that lever is amplified in displacement is flexibly connected so that its free end rotates around hinged place with corresponding fixed hinge, described salient point is arranged on displacement and amplifies on the free end of lever, and this salient point and the displacement of adjacent displacement amplifying unit are amplified the position between salient point and fixed hinge on lever and are contacted, salient point and spool that the displacement of the displacement amplifying unit of described final stage is amplified on lever connect, the displacement that one side of described piston is connected to first order displacement amplifying unit is amplified on lever on the position between salient point and fixed hinge, opposite side and the piezoelectric element of described piston connect, on housing, have the oil inlet and the oil outlet that are connected, spool is also positioned at housing, on this spool and housing, be provided with a pair of restriction, it cooperatively interacts and when contact, disconnects the hydraulic path between oil inlet and oil outlet, when separation, connect the hydraulic path between oil inlet and oil outlet, one end and the plug screw of pull back spring connect, the other end and spool connect and move axially to promote spool.
Further, it is main by piezoceramics layer and be respectively formed at the positive electrode layer of piezoceramics layer both sides and the piezoelectric unit part that positive electrode layer forms that described piezoelectric element has many groups, and positive electrode layer and positive electrode layer are electrically connected successively.
Further, on described housing, be provided with connection plug, described positive electrode layer is electrically connected successively afterwards and is connected with connection plug with positive electrode layer.
Further, in described housing, base is installed, described displacement amplifying mechanism comprises two-stage displacement amplifying unit, the displacement amplification lever that the displacement amplification lever of first order displacement amplifying unit is hinged on base Shang， second stage displacement amplifying unit by corresponding fixed hinge is hinged on housing by corresponding fixed hinge.
The present invention also provides a kind of EHB that adopts this piezoelectric type oil passage control valve, it comprises car side brake, reservoir, energy storage, oil-feed control cock, oil return control cock, control unit and pressure sensor, described piezoelectric type oil passage control valve has two, one of them is oil-feed control cock, another is oil return control cock, the oil inlet of described oil-feed control cock is connected with the oil outlet of energy storage, the oil outlet of oil-feed control cock is connected with the wheel cylinder of car side brake, the oil inlet of oil return control cock is connected with the wheel cylinder of car side brake, the oil outlet of oil return control cock is connected with reservoir, pressure sensor is connected on car side brake, and the signal output part of pressure sensor is connected with control unit, it is for gathering the brake fluid pressure of car side brake and being fed back to control unit, the control signal that control unit feeds back according to pressure sensor selects to control the dead electricity that obtains of oil-feed control cock and oil return control cock.
Further, also comprise energy storage pumping driver train, this energy storage pumping driver train comprises energy storage pressure sensor, oil pump, check valve and be connected to transmission for vehicles and oil pump between the magnetic clutch of control oil pump work, energy storage pressure sensor is connected on energy storage, and the signal output part of energy storage pressure sensor is connected with control unit, it is for gathering the brake fluid pressure in energy storage and being fed back to control unit, described control unit is connected with the control input end of magnetic clutch and obtains dead electricity so that the brake fluid pressure force signal that control unit feeds back according to energy storage pressure sensor selects to control it, described reservoir, oil pump, check valve and described energy storage are connected.
Further, described energy storage pumping driver train also comprises auxiliary motor, described auxiliary motor is connected with oil pump, and described control unit is connected with auxiliary motor phase control so that the lower limit signal of the brake fluid pressure feeding back according to energy storage pressure sensor selects to control its work.
The present invention also provides a kind of vehicle electric hydraulic brake system, it adopts this EHB, and EHB has four, be respectively the near front wheel hydraulic brake system, off front wheel hydraulic brake system, the left rear wheel hydraulic braking sysgtem off hind wheel hydraulic brake system of unifying, wherein, the reservoir of four EHBs all shares one, and energy storage all shares one, and control unit shares one.
Further, between the chargine line of the car side brake of described the near front wheel hydraulic brake system and the car side brake of off front wheel hydraulic brake system, be communicated with front-wheel balanced solenoid valve, between the chargine line of the car side brake of described left rear wheel hydraulic brake system and off hind wheel hydraulic brake system car side brake, be communicated with trailing wheel balanced solenoid valve, described front-wheel balanced solenoid valve and trailing wheel balanced solenoid valve are all connected to control respectively it and obtain dead electricity with described control unit phase control.
Further, also comprise emergency brake mechanism, this emergency brake mechanism comprises braking simulation master cylinder, brake pedal, pedal sense simulator and back pressure valve, braking simulation master cylinder has front end chamber and chamber, rear end, described reservoir is connected with front end chamber and chamber, rear end respectively, front end chamber is connected with the car side brake of the near front wheel hydraulic brake system and the car side brake of off front wheel hydraulic brake system respectively after connecting back pressure valve, and described chamber, rear end is connected with pedal sense simulator.
Adopted after technique scheme, the present invention has following beneficial effect:
1, piezoelectric element of the present invention applies electric field in piezoceramic direction of polarization, at electric field action lower piezoelectric pottery, mechanically deform can occur or produce mechanical strees; When external electric field removes, these distortion or stress also can disappear thereupon, piezoceramic is directly proportional to the size of electric field by deflection or stress value that electric field action produces, thereby a pair of restriction promoting between spool and housing engages or separation, disconnect or connect the hydraulic path between oil inlet and oil outlet, controlling the pressure size of braking liquid.Adopt displacement amplifying mechanism, the little displacement of piston can be amplified.The piezoelectric type oil passage control valve of this kind of structure has high dynamic response performance, can improve frequency and control accuracy that brake-pressure regulates, is suitable as very much the oil passage control valve of EHB.
2, the piezoelectric type oil passage control valve of EHB employing of the present invention based on inverse piezoelectric effect is oil-feed control cock and oil return control cock, by controlling the action of oil-feed control cock and oil return control cock, the accurate control of realization to wheel braking force, has improved dynamic response performance and the deceleration and stopping performance of EHB system.
3, emergency brake of the present invention mechanism makes vehicle electric hydraulic brake system of the present invention have emergency brake function, when vehicle electric hydraulic brake system lost efficacy, chaufeur can make the braking liquid of braking in the front end chamber of simulating master cylinder enter the car side brake of the near front wheel hydraulic brake system and the car side brake of off front wheel hydraulic brake system by back pressure valve by trampling energetically brake pedal, realizes automobile emergent brake function.
4, vehicle electric hydraulic brake system of the present invention has wheel braking selection function, and when the braking force of current axis left and right wheels needs independent control, front-wheel balanced solenoid valve obtains electric, disconnects the connection of left and right sides brake hydraulic line; When the braking force of current axis left and right wheels does not need independent control, front-wheel balanced solenoid valve dead electricity, connects left and right sides brake hydraulic line, makes the braking force of front axle left and right sides wheel consistent.In like manner, the work of the left and right wheel of rear axle also as mentioned above.
When 5, the oil pump of energy storage pumping driver train of the present invention be take braking, transmission output shaft drives as main, and direct motor drive is auxiliary, is beneficial to recovery braking energy, falls low-energy-consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of vehicle electric hydraulic brake system of the present invention;
Fig. 2 is the structural representation of piezoelectric type oil passage control valve of the present invention;
Fig. 3 is the structural representation of energy storage pumping driver train of the present invention.
The specific embodiment
For content of the present invention is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation below.
As shown in Figure 2, a kind of piezoelectric type oil passage control valve, it comprises displacement amplifying mechanism, plug screw 27, housing 32, piston 34, pull back spring 28, spool 29 and thereby it is created in the piezoelectric element 35 that mechanically deform on spool 29 axial directions forms the axial propelling thrust that the party makes progress when applying external electric field, plug screw 27 is threaded connection on housing 32, piston 34 and piezoelectric element 35 are positioned at housing 32, displacement amplifying mechanism comprises at least two-stage displacement amplifying unit, every grade of displacement amplifying unit comprises displacement amplification lever 30, fixed hinge 46 and salient point 30-1, the fixed end that lever 30 is amplified in displacement is flexibly connected so that its free end rotates around hinged place with corresponding fixed hinge 46, salient point 30-1 is arranged on displacement and amplifies on the free end of lever 30, and this salient point 30-1 and the displacement of adjacent displacement amplifying unit are amplified the position between salient point 30-1 and fixed hinge 46 on lever 30 and are contacted, salient point and spool 29 that the displacement of the displacement amplifying unit of final stage is amplified on lever 30 connect, the displacement that one side of piston 34 is connected to first order displacement amplifying unit is amplified on lever 30 on the position between salient point 30-1 and fixed hinge 46, the opposite side of piston 34 and piezoelectric element 35 connect, on housing 32, have the oil inlet 38 and the oil outlet 37 that are connected, spool 29 is also positioned at housing 32, on this spool 29 and housing 32, be provided with a pair of restriction 29-1, it cooperatively interacts and when contact, disconnects the hydraulic path between oil inlet 38 and oil outlet 37, when separation, connect the hydraulic path between oil inlet 38 and oil outlet 37, pull back spring 28 one end and plug screw 27 connect, the other end and spool 29 connect and move axially to promote spool 29.
Pull back spring 28 can be cylindroid helical-coil compression spring, be installed between plug screw 27 inner sides and spool 29, initial condition bears certain compressive force, by the restriction force together of the restriction of spool 29 and housing 32 inner sides, disconnect the hydraulic channel of oil inlet 38 and oil outlet 37, and its pre-compression force can regulate by screwing in or screw out plug screw 27.
Pull back spring 28 is installed in spool 29 one end, one end can be by No. 1 seal ring 31 and housing 32 inner side close contacts, its end face is carrying the thrust that piezoelectric element 35 distortion produce, restriction on spool 29 is the flange of establishing thereon, contact with the restriction of housing 32 inner sides, disconnect the hydraulic channel of oil inlet 38 and oil outlet 37; With the restricted portion of housing 32 inner sides from, connect the hydraulic channel of oil inlet 38 and oil outlet 37.Piston 34 is by No. 2 seal rings 33 and the interior side contacts of housing 32, and a side is displacement amplifying mechanism, and a side is piezoelectric element 35.
As shown in Figure 2, it is main by piezoceramics layer and be respectively formed at the positive electrode layer of piezoceramics layer both sides and the piezoelectric unit part that positive electrode layer forms that piezoelectric element 35 has many groups, and positive electrode layer and positive electrode layer are electrically connected successively.On housing 32, be provided with connection plug 36, positive electrode layer is electrically connected successively afterwards and is connected with connection plug 36 with positive electrode layer.Piezoelectric element 35 can adopt the multiple-structure of piezoelectricity thin-bed technique, and all positive electrode layers, positive electrode layer link together with lead-in wire respectively, supplies with as required the voltage of 0 volt or 160 volts by connection plug 36.It is the piezoelectric ceramic thin sheet of 80 microns that the piezoelectric element 35 of general 3 centimeter length can comprise 300 multi-layered thickness.
When loading 160 volts of voltages producing mechanically deform on piezoelectric element 35, promote piston 34 and move, and then overcome pull back spring 28 elastic force and promote spools 29 and move, connect the hydraulic channel of oil inlet 38 and oil outlet 37; When piezoelectric element 35 loads 0 volt of voltage, piezoelectric element 35 distortion disappear, and under the effect of pull back spring 28, the restriction of spool 29 is pressed in the restriction of housing 32 inner sides, disconnects the hydraulic channel of oil inlet 38 and oil outlet 37.
Displacement amplifying mechanism utilizes lever principle to amplify the little displacement of piston 34, meets the demand of spool 29 moving displacements.
As shown in Figure 1, a kind of EHB that adopts this piezoelectric type oil passage control valve, it comprises car side brake 23, reservoir 3, energy storage 7, oil-feed control cock 15, oil return control cock 16, control unit and pressure sensor 17, piezoelectric type oil passage control valve has two, one of them is oil-feed control cock 15, another is oil return control cock 16, the oil inlet of oil-feed control cock 15 is connected with the oil outlet of energy storage 7, the oil outlet of oil-feed control cock 15 is connected with the wheel cylinder of car side brake 23, the oil inlet of oil return control cock 16 is connected with the wheel cylinder of car side brake 23, the oil outlet of oil return control cock 16 is connected with reservoir 3, pressure sensor 17 is connected on car side brake 23, and the signal output part of pressure sensor 17 is connected with control unit, it is for gathering the brake fluid pressure of car side brake 23 and being fed back to control unit, the control signal that control unit feeds back according to pressure sensor 17 selects to control the dead electricity that obtains of oil-feed control cock 15 and oil return control cock 16.Pressure sensor, both can detect car side brake 23 inside brake hydraulic couplings, in real time as the feedback signal of braking pressure control; Also can be used as the reference signal of EHB thrashing.The wheel of take is example, and when wheel brake pressure is lower, control unit feeds oil control valve 15 power supplies, and the braking liquid in energy storage 7 enters in the wheel cylinder of car side brake 23, and brake-pressure increases; When brake-pressure is higher, control unit is to 16 power supplies of oil return control cock, and the braking liquid in the wheel cylinder of car side brake 23 is got back to reservoir 3, and brake-pressure reduces; When brake-pressure is consistent with expected value, oil-feed control cock 15 and oil return control cock 16 be dead electricity all, and disconnection car side brake 23 is connected with reservoir 3, energy storage 7, keeps brake-pressure, by continuous quick adjustment, by braking pressure control in the preferred range.If the force value that pressure sensor 17 provides and target pressure value differ larger, control unit thinks that EHB system exists fault, reports to the police in time by fault-indicating lamp, reminds chaufeur to note; In addition, the piezoelectric element dead electricity of oil-feed control cock 15 during initial condition, disconnects into and out of hydraulic fluid port, and the braking liquid in energy storage 7 can not enter car side brake 23; When the piezoelectric element 35 of oil-feed control cock 15 when electric, into and out of hydraulic fluid port, connect, the braking liquid in energy storage 7 enters car side brake 23, the brake-pressure of car side brake 23 increases; Piezoelectric element 35 dead electricity of oil return control cock 16 during initial condition, disconnect into and out of hydraulic fluid port, and the braking liquid in car side brake 23 wheel cylinders can not enter reservoir 3; When the piezoelectric element 35 of oil return control cock 16 when electric, into and out of hydraulic fluid port, connect, under the effect of reservoir 3 suction, the braking liquid in car side brake 23 wheel cylinders enters reservoir 3, wheel brake pressure reduces.
Above-mentioned reservoir 3 adopts expansion type reservoir, its inside brake liquid can be by oil pump 6 pumps to energy storage 7, also can the braking liquid in car side brake 23 wheel cylinders be sucked back by self suction, energy storage 7 is high pressure accumulator, which is provided with pressure sensor 8, when energy storage 7 insufficient pressure, oil pump 6 work are to the interior supplementary braking liquid of energy storage 7.
As shown in Figure 3, EHB also comprises energy storage pumping driver train, this energy storage pumping driver train comprises energy storage pressure sensor 8, oil pump 6, check valve 43 and be connected to transmission for vehicles and oil pump 6 between the magnetic clutch 42 of control oil pump 6 work, energy storage pressure sensor 8 is connected on energy storage 7, and the signal output part of energy storage pressure sensor 8 is connected with control unit, it is for gathering the brake fluid pressure in energy storage 7 and being fed back to control unit, control unit is connected with magnetic clutch 42 control input end and obtains dead electricity so that the brake fluid pressure force signal that control unit feeds back according to energy storage pressure sensor 8 selects to control it, reservoir 3, oil pump 6, check valve 43 and described energy storage 7 are connected.44 is by pass valve, and while preventing oil pump 6 or auxiliary motor 45 work, the hypertonia in energy storage 7, plays a protective role to system.Energy storage pumping driver train also comprises auxiliary motor 45, auxiliary motor 45 is connected with oil pump 6, and control unit is connected with auxiliary motor 45 phase controls so that the lower limit signal of the brake fluid pressure feeding back according to energy storage pressure sensor 8 selects to control its work.Oil pump 6 one sides are provided with auxiliary motor 45, can be by auxiliary motor 45 driving work; One side is connected by the parts (driven gear 41, driving gear 39 and transmission output shaft 40) of magnetic clutch 42, change-speed box.When car brakeing and rate of braking are when larger, magnetic clutch 42 obtains electric joint, transmission output shaft 40 drives oil pump 6 work, now, both recyclable braking energy, alleviated drg burden, can reduce again electrical motor 45 and drive the energy consumption producing, when oil pump 6 be take braking, transmission output shaft 40 drives as main, and it is auxiliary that electrical motor 45 drives, and only has just driving work of electrical motor 45 when energy storage 7 pressure reach low extreme value.
As shown in Figure 1, a kind of vehicle electric hydraulic brake system, it adopts above-mentioned EHB, and EHB has four, be respectively the near front wheel hydraulic brake system 100, off front wheel hydraulic brake system 200, left rear wheel hydraulic brake system 300 and off hind wheel hydraulic brake system 400, wherein, the reservoir 3 of four EHBs all shares one, energy storage 7 all shares one, and control unit shares one.The principle of work of each EHB is as EHB above.
As shown in Figure 1, between the chargine line of the car side brake 23 of the near front wheel hydraulic brake system 100 and the car side brake 23 of off front wheel hydraulic brake system 200, be communicated with front-wheel balanced solenoid valve 22, between the chargine line of the car side brake 23 of left rear wheel hydraulic brake system 300 and the car side brake 23 of off hind wheel hydraulic brake system 400, be communicated with trailing wheel balanced solenoid valve 21, front-wheel balanced solenoid valve 22 and trailing wheel balanced solenoid valve 21 are all connected to control respectively it and obtain dead electricity with described control unit phase control.This structure has wheel braking selection function, and when the braking force of current axis left and right wheels needs independent control, front-wheel balanced solenoid valve 22 obtains electric, disconnects the connection of left and right sides brake hydraulic line; When the braking force of current axis left and right wheels does not need independent control, front-wheel balanced solenoid valve 22 dead electricity, connect left and right sides brake hydraulic line, make the braking force of front axle left and right sides wheel consistent, and in like manner, the work of the left and right wheel of rear axle also as mentioned above.
As shown in Figure 1, vehicle electric hydraulic brake system also comprises emergency brake mechanism, this emergency brake mechanism comprises braking simulation master cylinder 2, brake pedal 1, pedal sense simulator 4 and back pressure valve 5, braking simulation master cylinder 2 has front end chamber 2-1He rear end chamber 2-2, reservoir 3 is connected with front end chamber 2-1He rear end chamber 2-2 respectively, front end chamber 2-1 connects that back pressure valve 5 is rear to be connected with the car side brake 23 of the near front wheel hydraulic brake system 100 and the car side brake 23 of off front wheel hydraulic brake system 200 respectively, and chamber, rear end 2-2 is connected with pedal sense simulator 4.Emergency brake of the present invention mechanism makes vehicle electric hydraulic brake system of the present invention have emergency brake function, when vehicle electric hydraulic brake system lost efficacy, chaufeur can make the braking liquid of braking in the front end chamber 2-1 that simulates master cylinder 2 enter the car side brake 23 of the near front wheel hydraulic brake system 100 and the car side brake 23 of off front wheel hydraulic brake system 200 by back pressure valve 5 by trampling energetically brake pedal 1, realizes automobile emergent brake function.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect that the present invention is solved further describe; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a piezoelectric type oil passage control valve, it is characterized in that: it comprises displacement amplifying mechanism, plug screw (27), housing (32), piston (34), pull back spring (28), spool (29) and when apply external electric field its be created in spool (29) thus the mechanically deform on axial direction forms the piezoelectric element (35) of the axial propelling thrust that the party makes progress, plug screw (27) is threaded connection on housing (32), piston (34) and piezoelectric element (35) are positioned at housing (32), displacement amplifying mechanism comprises at least two-stage displacement amplifying unit, every grade of displacement amplifying unit comprises displacement amplification lever (30), fixed hinge (46) and salient point (30-1), the fixed end that lever (30) is amplified in displacement is flexibly connected so that its free end rotates around hinged place with corresponding fixed hinge (46), described salient point (30-1) is arranged on displacement and amplifies on the free end of lever (30), and this salient point (30-1) contacts with the position that the displacement of adjacent displacement amplifying unit is amplified between the upper salient point (30-1) of lever (30) and fixed hinge (46), salient point and spool (29) that the displacement of the displacement amplifying unit of described final stage is amplified on lever (30) connect, one side of described piston (34) is connected to the displacement of first order displacement amplifying unit and amplifies on the position between the upper salient point (30-1) of lever (30) and fixed hinge (46), the opposite side of described piston (34) and piezoelectric element (35) connect, on housing (32), have the oil inlet (38) and the oil outlet (37) that are connected, spool (29) is also positioned at housing (32), on this spool (29) and housing (32), be provided with a pair of restriction (29-1), it cooperatively interacts and when contact, disconnects the hydraulic path between oil inlet (38) and oil outlet (37), when separation, connect the hydraulic path between oil inlet (38) and oil outlet (37), one end of pull back spring (28) and plug screw (27) connect, the other end and spool (29) connect and move axially to promote spool (29).
2. piezoelectric type oil passage control valve according to claim 1, it is characterized in that: it is main by piezoceramics layer and be respectively formed at the positive electrode layer of piezoceramics layer both sides and the piezoelectric unit part that positive electrode layer forms that described piezoelectric element (35) has many groups, and positive electrode layer and positive electrode layer are electrically connected successively.
3. piezoelectric type oil passage control valve according to claim 2, is characterized in that: on described housing (32), be provided with connection plug (36), described positive electrode layer is electrically connected successively afterwards and is connected with connection plug (36) with positive electrode layer.
4. piezoelectric type oil passage control valve according to claim 1, it is characterized in that: base (47) is installed in described housing (32), described displacement amplifying mechanism comprises two-stage displacement amplifying unit, the displacement amplification lever (30) that the displacement amplification lever (30) of first order displacement amplifying unit is hinged on base (47) Shang， second stage displacement amplifying unit by corresponding fixed hinge (46) is hinged on housing (32) by corresponding fixed hinge (46).
5. the EHB of the employing piezoelectric type oil passage control valve as described in any one in claim 1 to 4, it is characterized in that: it comprises car side brake (23), reservoir (3), energy storage (7), oil-feed control cock (15), oil return control cock (16), control unit and pressure sensor (17), described piezoelectric type oil passage control valve has two, one of them is oil-feed control cock (15), another is oil return control cock (16), the oil inlet of described oil-feed control cock (15) is connected with the oil outlet of energy storage (7), the oil outlet of oil-feed control cock (15) is connected with the wheel cylinder of car side brake (23), the oil inlet of oil return control cock (16) is connected with the wheel cylinder of car side brake (23), the oil outlet of oil return control cock (16) is connected with reservoir (3), pressure sensor (17) is connected on car side brake (23), and the signal output part of pressure sensor (17) is connected with control unit, it is for gathering the brake fluid pressure of car side brake (23) and being fed back to control unit, the control signal that control unit feeds back according to pressure sensor (17) selects to control the dead electricity that obtains of oil-feed control cock (15) and oil return control cock (16).
6. EHB according to claim 5, it is characterized in that: also comprise energy storage pumping driver train, this energy storage pumping driver train comprises energy storage pressure sensor (8), oil pump (6), check valve (43) and be connected to transmission for vehicles and oil pump (6) between the magnetic clutch (42) of control oil pump (6) work, energy storage pressure sensor (8) is connected on energy storage (7), and the signal output part of energy storage pressure sensor (8) is connected with control unit, it is for gathering the brake fluid pressure in energy storage (7) and being fed back to control unit, described control unit is connected with the control input end of magnetic clutch (42) and obtains dead electricity so that the brake fluid pressure force signal that control unit feeds back according to energy storage pressure sensor (8) selects to control it, described reservoir (3), oil pump (6), check valve (43) and described energy storage (7) are connected.
7. EHB according to claim 6, it is characterized in that: described energy storage pumping driver train also comprises auxiliary motor (45), described auxiliary motor (45) is connected with oil pump (6), and described control unit is connected with auxiliary motor (45) phase control so that the lower limit signal of the brake fluid pressure feeding back according to energy storage pressure sensor (8) selects to control its work.
8. a vehicle electric hydraulic brake system, it is characterized in that: it adopts EHB as claimed in claim 5, and EHB has four, be respectively the near front wheel hydraulic brake system (100), off front wheel hydraulic brake system (200), left rear wheel hydraulic brake system (300) and off hind wheel hydraulic brake system (400), wherein, the reservoir of four hydraulic brake systems (3) all shares one, energy storage (7) all shares one, and control unit shares one.
9. vehicle electric hydraulic brake system according to claim 8, it is characterized in that: between the car side brake (23) of described the near front wheel hydraulic brake system (100) and the chargine line of the car side brake (23) of off front wheel hydraulic brake system (200), be communicated with front-wheel balanced solenoid valve (22), between the chargine line of the car side brake (23) of described left rear wheel hydraulic brake system (300) and the car side brake (23) of off hind wheel hydraulic brake system (400), be communicated with trailing wheel balanced solenoid valve (21), described front-wheel balanced solenoid valve (22) and trailing wheel balanced solenoid valve (21) are all connected to control respectively it and obtain dead electricity with described control unit phase control.
10. vehicle electric hydraulic brake system according to claim 8, it is characterized in that: also comprise emergency brake mechanism, this emergency brake mechanism comprises braking simulation master cylinder (2), brake pedal (1), pedal sense simulator (4) and back pressure valve (5), braking simulation master cylinder (2) has front end chamber (2-1) and chamber, rear end (2-2), described reservoir (3) is connected with front end chamber (2-1) and chamber, rear end (2-2) respectively, front end chamber (2-1) is connected with the car side brake (23) of the near front wheel hydraulic brake system (100) and the car side brake (23) of off front wheel hydraulic brake system (200) respectively after connecting back pressure valve (5), described chamber, rear end (2-2) is connected with pedal sense simulator (4).
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| CN201310453629.7A CN103507800B (en) | 2013-09-29 | 2013-09-29 | EHB and vehicle electric brake fluid system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442777A (en) * | 2014-11-27 | 2015-03-25 | 江苏理工学院 | Chassis wheel edge distributive type independent brake executing mechanism and chassis brake system |
| CN106627541A (en) * | 2016-09-30 | 2017-05-10 | 三环集团有限公司 | Automobile active hydraulic braking system |
| CN107249943A (en) * | 2015-02-27 | 2017-10-13 | 株式会社爱德克斯 | Brake control apparatus for vehicles |
| CN108332885A (en) * | 2018-03-06 | 2018-07-27 | 中国航发哈尔滨东安发动机有限公司 | A kind of monitoring of structures of power |
| CN108501921A (en) * | 2018-05-04 | 2018-09-07 | 吉林大学 | A kind of hydraulic pressure line control brake system and its brake control method with double pressure sources |
| EP3491921A1 (en) * | 2017-12-01 | 2019-06-05 | Deere & Company | Mobile agricultural application machine, spray nozzle assembly and method of controlling a mobile agricultural machine |
| CN110985157A (en) * | 2019-12-25 | 2020-04-10 | 潍柴动力股份有限公司 | Exhaust brake system, control method thereof and vehicle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4762300A (en) * | 1985-02-19 | 1988-08-09 | Nippondenso Co., Ltd. | Control valve for controlling fluid passage |
| JPH03235753A (en) * | 1990-02-08 | 1991-10-21 | Toyota Motor Corp | Hydraulic pressure control device |
| US20040206409A1 (en) * | 2003-04-18 | 2004-10-21 | Takeshi Yano | Piezoelectric air valve and multiple-type piezoelectric air valve |
| CN1661244A (en) * | 2004-02-23 | 2005-08-31 | 北京航空航天大学 | Servo valve of piezoelectric ceramic |
| CN201208960Y (en) * | 2008-03-31 | 2009-03-18 | 浙江亚太机电股份有限公司 | Excuting machanism for vehicle electrohydraulic line controlled braking system |
| CN102758946A (en) * | 2012-07-22 | 2012-10-31 | 徐凯敏 | Piezoelectric-type electronic expansion valve |
| CN103318158A (en) * | 2013-07-01 | 2013-09-25 | 吉林大学 | Integrated electronic hydraulic brake system of automobile |
| CN203844742U (en) * | 2013-09-29 | 2014-09-24 | 江苏理工学院 | Piezoelectric type oil way control valve, electric hydraulic brake and automobile hydraulic braking system |
-
2013
- 2013-09-29 CN CN201310453629.7A patent/CN103507800B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4762300A (en) * | 1985-02-19 | 1988-08-09 | Nippondenso Co., Ltd. | Control valve for controlling fluid passage |
| JPH03235753A (en) * | 1990-02-08 | 1991-10-21 | Toyota Motor Corp | Hydraulic pressure control device |
| US20040206409A1 (en) * | 2003-04-18 | 2004-10-21 | Takeshi Yano | Piezoelectric air valve and multiple-type piezoelectric air valve |
| CN1661244A (en) * | 2004-02-23 | 2005-08-31 | 北京航空航天大学 | Servo valve of piezoelectric ceramic |
| CN201208960Y (en) * | 2008-03-31 | 2009-03-18 | 浙江亚太机电股份有限公司 | Excuting machanism for vehicle electrohydraulic line controlled braking system |
| CN102758946A (en) * | 2012-07-22 | 2012-10-31 | 徐凯敏 | Piezoelectric-type electronic expansion valve |
| CN103318158A (en) * | 2013-07-01 | 2013-09-25 | 吉林大学 | Integrated electronic hydraulic brake system of automobile |
| CN203844742U (en) * | 2013-09-29 | 2014-09-24 | 江苏理工学院 | Piezoelectric type oil way control valve, electric hydraulic brake and automobile hydraulic braking system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442777A (en) * | 2014-11-27 | 2015-03-25 | 江苏理工学院 | Chassis wheel edge distributive type independent brake executing mechanism and chassis brake system |
| CN107249943A (en) * | 2015-02-27 | 2017-10-13 | 株式会社爱德克斯 | Brake control apparatus for vehicles |
| CN106627541A (en) * | 2016-09-30 | 2017-05-10 | 三环集团有限公司 | Automobile active hydraulic braking system |
| EP3491921A1 (en) * | 2017-12-01 | 2019-06-05 | Deere & Company | Mobile agricultural application machine, spray nozzle assembly and method of controlling a mobile agricultural machine |
| US10980170B2 (en) | 2017-12-01 | 2021-04-20 | Deere & Company | Piezo actuated nozzle control valve |
| US11800830B2 (en) | 2017-12-01 | 2023-10-31 | Deere & Company | Piezo actuated nozzle control valve |
| CN108332885A (en) * | 2018-03-06 | 2018-07-27 | 中国航发哈尔滨东安发动机有限公司 | A kind of monitoring of structures of power |
| CN108501921A (en) * | 2018-05-04 | 2018-09-07 | 吉林大学 | A kind of hydraulic pressure line control brake system and its brake control method with double pressure sources |
| CN108501921B (en) * | 2018-05-04 | 2019-04-02 | 吉林大学 | A kind of hydraulic line control brake system and its brake control method with double pressure sources |
| CN110985157A (en) * | 2019-12-25 | 2020-04-10 | 潍柴动力股份有限公司 | Exhaust brake system, control method thereof and vehicle |
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