CN202508078U - Automobile integrated brake-by-wire system - Google Patents
Automobile integrated brake-by-wire system Download PDFInfo
- Publication number
- CN202508078U CN202508078U CN 201220094978 CN201220094978U CN202508078U CN 202508078 U CN202508078 U CN 202508078U CN 201220094978 CN201220094978 CN 201220094978 CN 201220094978 U CN201220094978 U CN 201220094978U CN 202508078 U CN202508078 U CN 202508078U
- Authority
- CN
- China
- Prior art keywords
- brake
- piston
- braking
- chamber
- electromagnetic switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Regulating Braking Force (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
The utility model discloses an automobile integrated brake-by-wire system. The automobile integrated brake-by-wire system is aimed at providing a brake system which can achieve not only brake-by-wire but also conventional hydraulic brake when brake-by-wire has a breakdown, and has the advantages of being small in braking length and occupied space. The automobile integrated brake-by-wire system comprises an electronic control unit, a brake fluid tank, a pump, a brake master cylinder, a wheel brake and a brake pedal. A journey sensor is arranged on the brake pedal, and a first braking access is connected with the brake master cylinder and the wheel brake. A second braking access is connected with the wheel brake and the brake fluid tank, the brake master cylinder is provided with a work cavity and a fluid replacement cavity on two sides of a piston, and a first return spring is arranged in the work cavity. The pump is arranged between the brake fluid tank and the brake master cylinder, and connected with the brake fluid tank. A third braking access is respectively connected with the work cavity and the fluid replacement cavity from an exit of the pump. A fourth braking access is connected with the fluid replacement cavity and the brake fluid tank, and a third electromagnetic switch valve is arranged on the fourth braking access.
Description
Technical field
The utility model relates to a kind of brake system of car, is specifically related to a kind of integrated line control brake system of automobile that is made up of jointly electron steering and hydraulic efficiency pressure system.
Background technology
Along with the development of electron controls technology, the brake system of automobile has also been used electron controls technology gradually, to realize brake-by-wire.For pure line control brake system, promptly connect with electric wire, electric wire transmits energy, and data line transmits signal, comes the direct controlled wheel drg to realize braking.This pure line control brake system is partly separated brake operatings such as brake operation partial sum car side brake such as pedal, and what in braking procedure, produce makes us unjoyful vibration and can not be delivered on the brake pedal; But the weak point that it has, in case promptly be that the electron steering whole brake system that breaks down has just been paralysed.
Further, for fear of the weak point of pure line control brake system, with hydraulic braking and two kinds of brake system of deceleration of electrons use simultaneously with brake system of car in; When deceleration of electrons control is broken down, can also realize braking by hydraulic brake system.This brake system had both been used traditional hydraulic brake system to guarantee enough braking safeties, utilized the deceleration of electrons advantage again; But because two cover brake system exist simultaneously, complex structure, cost are higher, have also increased the care and maintenance difficulty.On the other hand, in the brake system of this type,, also an energy storage equipment can be set separately usually in order to reach the effect of an emergent hydraulic braking with hydraulic braking and deceleration of electrons combination; But it takes up room greatly, has further taken automobile originally with regard to limited space.
Further; For example, Chinese patent publication number CN1820989, open day on 08 23rd, 2006; The name that utility model is created is called electronically controlled hydraulic brake system; This application case discloses a kind of electronically controlled hydraulic brake system, when it can be implemented in brake-by-wire and breaks down, can also realize braking through conventional hydraulic brake system.But because the restriction of conventional hydraulic brake system and master brake cylinder structure thereof; When breaking down, can also realize conventional hydraulic braking in order to be implemented in brake-by-wire; As disclosed in the above-mentioned application case; Need in conventional hydraulic brake system, increase the hydraulic circuit that is communicated with the brake-by-wire of car side brake by brake-fluid tank; And pump is arranged on the hydraulic circuit of setting up, detect the shift motion of brake pedal through stroke sensor; And pass to electronic control package and be used for the modulated pressure control setup and realize brake-by-wire.This type brake system has following deficiency: one of which; Can realize conventional hydraulic braking for On-line Control is moving when breaking down; This scheme realizes braking with passing through the connecting rod direct connection together between brake pedal and master brake cylinder or the servo-unit thereby make treadle effort to be delivered to through connecting rod on master brake cylinder or the servo-unit; But making of so just cannot avoiding produces in the braking procedure makes us unjoyful vibration and can be delivered on the brake pedal, and this problem also is the conventional hydraulic brake system of existing this type when combining with brake-by-wire, the problem that never is resolved.Because, in the moving system of the compacting of routine for the treadle effort failure-free is delivered on master brake cylinder or the servo-unit, then need be with passing through connecting rod or other structure direct connections between brake pedal and master brake cylinder or the servo-unit together.They are two years old; In order in conventional hydraulic brake system, to realize brake-by-wire; Common design is identical with this programme, promptly on conventional hydraulic braking path, has increased the hydraulic circuit that is communicated with the brake-by-wire of car side brake by brake-fluid tank, and pump is arranged on the hydraulic circuit of setting up; But owing to set up the hydraulic circuit of brake-by-wire, make the pipeline of hydraulic brake circuit increase, this not only can increase cost, increase maintenance difficulties; The more important thing is because the pipeline growth can make and increase braking retardation stopping distance, reduce safety.
The utility model content
First purpose of the utility model is in order to overcome this type the brake-by-wire structure to be set up in conventional hydraulic brake system; Owing to increased the hydraulic circuit of brake-by-wire; Make the pipeline of hydraulic brake circuit increase, not only increased cost, also increase the problem of stopping distance, reduction safety; Provide a kind of and not only can realize brake-by-wire; On-line Control is moved when breaking down, and can also realize conventional hydraulic braking, and the integrated line control brake system of the automobile that productive costs is low, stopping distance is little, safe.
Second purpose of the utility model is in order to overcome the conventional hydraulic brake system of this type and to combine with brake-by-wire; Can realize conventional hydraulic braking for On-line Control is moving when breaking down; And brake pedal and master brake cylinder or servo-unit are linked together through connecting rod or other structures; Making provides making us unjoyful vibration and can being delivered to the problem on the brake pedal of producing in the braking procedure a kind of and not only can realize brake-by-wire, and On-line Control is moving when breaking down; Can also realize conventional hydraulic braking, and produce in the moving process of On-line Control make us unjoyful vibration and can not be delivered to the integrated line control brake system of automobile on the brake pedal.
The 3rd purpose of the utility model is in order to overcome this type hydraulic braking and deceleration of electrons to be combined; The energy storage equipment that is provided with for the effect that reaches an emergent hydraulic braking; The problem that it takes up room greatly, cost of manufacture is high; Thereby provide a kind of realize energy storage equipment and master brake cylinder be combined as a whole reduce brake system occupation space, cost-cutting; And On-line Control is moved when breaking down, and can also realize the integrated line control brake system of automobile of conventional hydraulic braking.
The technical scheme of the utility model is:
The integrated line control brake system of a kind of automobile comprises electronic control unit, brake-fluid tank, pump, master brake cylinder, car side brake and brake pedal; Brake pedal is provided with stroke sensor, and one first braking path connects master brake cylinder and car side brake, and the first braking path is provided with first electromagnetic switch valve; One second braking path connects car side brake and brake-fluid tank, and the second braking path is provided with second electromagnetic switch valve, and the piston both sides on the said master brake cylinder are provided with epitrochoidal chamber and fluid infusion chamber, are provided with first retracing spring in the epitrochoidal chamber; Said pump is between brake-fluid tank and master brake cylinder and be communicated with brake-fluid tank; One the 3rd braking path, it connects epitrochoidal chamber and fluid infusion chamber respectively by pump discharge; One the 4th braking path connects fluid infusion chamber and brake-fluid tank, and the 4th braking path is provided with the 3rd electromagnetic switch valve of open type.This programme detects the action of brake pedal and passes the signal along to electronic control unit through stroke sensor, electronic control unit controls driven by motor pump, thus realize brake-by-wire.On-line Control is moved when breaking down; Connect fluid infusion chamber and brake-fluid tank owing to be provided with the 4th braking path; And the 3rd electromagnetic switch valve that is provided with on the 4th braking path is the electromagnetic switch valve of open type; This moment, the fluid infusion chamber was communicated with brake-fluid tank through the 4th braking path, therefore can directly realize conventional hydraulic braking through brake pedal through master brake cylinder.Importantly, pump is located between brake-fluid tank and the master brake cylinder, and pump connects the epitrochoidal chamber and the fluid infusion chamber of master brake cylinder respectively through the 3rd braking path; Pump can reach a balance to the piston institute applied pressure of master brake cylinder in the moving process of On-line Control like this, so can not have influence on the effect of trampling of brake pedal in the moving process of On-line Control; Simultaneously,, so just need not increase the hydraulic circuit of brake-by-wire, can greatly shorten the pipeline length of the hydraulic circuit of brake-by-wire, reduce stopping distance, improve the brake safe performance because pump is located between brake-fluid tank and the master brake cylinder.On the other hand; The brake system of this programme is controlled by an electronic control unit motor and pump provides pressure source to directly act on master brake cylinder; With traditional master brake cylinder and the integrated design of forming by motor and pump of pressure regulating unit; Improve the system modular degree, reduced cost, saved the arrangement space of car inside brake system.
As preferably, the first braking path comprise with epitrochoidal chamber bonded assembly first overall channel and respectively with each car side brake bonded assembly first bypass passage, said first electromagnetic switch valve is the open type electromagnetic switch valve and is located at respectively on each first bypass passage; The second braking path comprise with brake-fluid tank bonded assembly second overall channel and respectively with each car side brake bonded assembly second bypass passage, second electromagnetic switch valve is the closed type electromagnetic switch valve and is located at respectively on each second bypass passage.Through first bypass passage, second bypass passage and first electromagnetic switch valve and second electromagnetic switch valve, make each car side brake form separate braking path; In the time of can avoiding a certain bypass passage or electromagnetic switch valve to be out of order, make whole brake system lose efficacy.On the other hand, because first electromagnetic switch valve is the open type electromagnetic switch valve, On-line Control is moved when breaking down like this, can also realize conventional hydraulic braking.
As preferably, the long-pending A of the piston cross-section that contacts with epitrochoidal chamber on the master brake cylinder amasss B less than the piston cross-section that contact with the fluid infusion chamber; Said brake pedal is provided with the pedal rod relative with the piston rod of master brake cylinder, is provided with the gap between the end of said pedal rod and the piston rod end face or is resisted against on the piston rod end face.In the process that On-line Control is moved, just in the process of pump work, because the long-pending A of the piston cross-section that contacts with epitrochoidal chamber amasss B less than the piston cross-section that contacts with the fluid infusion chamber, and epitrochoidal chamber is identical with the pressure in fluid infusion chamber in the process of pump work; Can initiatively move in this process that just makes the piston On-line Control of master brake cylinder move, make the piston rod of master brake cylinder and the spacing between the pedal rod become big gradually toward epitrochoidal chamber; That is to say that brake operating parts such as brake pedal and car side brake will can not contact in the moving process of On-line Control, so On-line Control is moved making us unjoyful vibration and can not being delivered on the brake pedal of producing in the process.In addition, the moving effect that does not have pump when breaking down of On-line Control, the braking in epitrochoidal chamber and fluid infusion chamber are pressed and will be approached zero very for a short time; Can reset the piston of master brake cylinder this moment under the effect of retracing spring, make piston rod and the location restore between the pedal rod of master brake cylinder to initial condition, to realize conventional hydraulic braking.This scenario-frame not only can be realized in the pure line control brake system brake operatings such as brake operation partial sum car side brake such as brake pedal partly being separated, and can also realize conventional hydraulic braking with brake operating part direct connections such as brake pedal and car side brakes together.
As preferably, the piston rod of master brake cylinder is positioned at fluid infusion chamber one side, and the piston side relative with epitrochoidal chamber is provided with a guide rod coaxial with piston rod, and guide rod runs through between cylinder body and the guide rod and the cylinder body of master brake cylinder and is provided with seal ring; Said guide rod cross-sectional area is greater than the piston rod cross-sectional area.Because a side of the piston of master brake cylinder is provided with piston rod, opposite side is provided with guide rod, and the guide rod cross-sectional area is greater than the piston rod cross-sectional area; Making the piston cross-section that contacts with epitrochoidal chamber amass will amass less than the piston cross-section that contacts with the fluid infusion chamber; Brake operating parts such as brake pedal and car side brake will can not contact in the moving process of On-line Control, so On-line Control is moved making us unjoyful vibration and can not being delivered on the brake pedal of producing in the process.This scenario-frame not only can be realized in the pure line control brake system brake operatings such as brake operation partial sum car side brake such as brake pedal partly being separated, and can also realize conventional hydraulic braking with brake operating part direct connections such as brake pedal and car side brakes together.
As preferably, the end face of the cylinder body of master brake cylinder is provided with a stepped hole, and the bore that is provided with two stage rank and stepped hole in the stepped hole is reduced toward interior by open end gradually, and the stepped hole open end is provided with end cover; The piston of master brake cylinder is located in the stepped hole between the two stage rank, and said epitrochoidal chamber is located between piston and the stepped hole bottom surface, and said fluid infusion chamber is located between piston and the end cover; Said end cover is provided with the first fluid infusion hole that is communicated with the fluid infusion chamber with cylinder body between the adjacent step, and said stepped hole bottom surface is provided with first inlet opening and first fluid hole that is communicated with epitrochoidal chamber with cylinder body between the adjacent step.Because first inlet opening and first fluid hole are located at the stepped hole bottom surface and are adjacent on the cylinder body between the step; And the piston of master brake cylinder is located in the stepped hole between the two stage rank; Can avoid pressing when excessive because of the braking in epitrochoidal chamber and fluid infusion chamber, the piston of master brake cylinder stops up first inlet opening and first fluid hole live.In addition; Because the first fluid infusion hole is arranged on end cover and is adjacent on the cylinder body between the step; The bore of the stepped hole at place, the first fluid infusion hole is maximum; Stop up the first fluid infusion hole in the time of can avoiding the piston of master brake cylinder under action of reset spring, to reset like this, can reduce the requirement of making precision.
As preferably, brake pedal is provided with tramples simulator, tramples simulator and comprises hydraulic actuating cylinder, and hydraulic cylinder piston rod is connected with brake pedal through a push rod; Hydraulic actuating cylinder comprises first cavity at piston rod place and is positioned at second cavity of piston opposite side, is provided with second retracing spring in second cavity; One the 5th braking path, it connects first cavity and second cavity respectively by epitrochoidal chamber; And the piston cross-section that contacts with first cavity is long-pending long-pending less than the piston cross-section that contacts with second cavity.Owing to be provided with and trample simulator, can provide a kind of being similar to trample sensation really in the moving process of On-line Control.Trample stroke when big more when brake pedal; The braking that the electronic control unit controls pump produces is pressed also big more accordingly; Because the 5th braking path; It connects first cavity and second cavity respectively by epitrochoidal chamber, and the piston cross-section of first cavity contact is long-pending long-pending greater than the piston cross-section that contacts with second cavity; Make when brake pedal trample stroke when big more, receive that the resistance of trampling simulator is also big more, further the authenticity of sensation is trampled in raising.
As preferably, one the 6th braking path, it connects brake-fluid tank and fluid infusion chamber, and said the 6th braking path is provided with a braking liquid can be by brake-fluid tank to the first mobile check valve of fluid infusion chamber.In the electronic control unit normal operation, and motor or pump can cooperate through the 6th braking path and first check valve and realize conventional hydraulic braking when fault occurring.
As preferably, epitrochoidal chamber is provided with pressure sensor; Said the 3rd braking path comprises and pump discharge bonded assembly the 3rd overall channel and respectively at epitrochoidal chamber and fluid infusion chamber bonded assembly the 3rd bypass passage, the 3rd overall channel and be provided with second check valve and the 3rd check valve that braking liquid can be flowed to epitrochoidal chamber by brake-fluid tank with epitrochoidal chamber bonded assembly the 3rd bypass passage.Second check valve can prevent that the fluid in epitrochoidal chamber and the fluid infusion chamber is back in the pump.The 3rd check valve can prevent that the fluid in the epitrochoidal chamber from being flow in fluid infusion chamber or the pump by the 3rd bypass passage.
As preferably, an end of master brake cylinder is provided with the accumulation of energy chamber and the accumulation of energy chamber is connected with epitrochoidal chamber, and accumulation of energy is provided with piston and energy-storaging spring in the chamber; The first braking path is provided with the 4th electromagnetic switch valve that is used to control the first braking path break-make.Because the end of master brake cylinder is provided with the accumulation of energy chamber and the accumulation of energy chamber is connected with epitrochoidal chamber; When accumulation of energy, the 3rd electromagnetic switch valve and the 4th electromagnetic switch valve are closed through electronic control unit; Through pump epitrochoidal chamber and fluid infusion chamber are pressurizeed then, and then carry out accumulation of energy.Thereby can realize energy storage equipment and master brake cylinder be combined as a whole through this programme structure reduces the brake system occupation space.
As preferably, the 4th electromagnetic switch valve is normally closed open form electromagnetic switch valve; The 3rd electromagnetic switch valve is the open type electromagnetic switch valve; One self adaptation on-off system is connected on first overall channel with parallelly connected connection mode with the 4th electromagnetic switch valve through the 7th braking path; Said self adaptation on-off system comprises a self adaptation cylinder body; The internal cavity of self adaptation cylinder body is the stepped cavity of narrowing toward each end broad in the middle; The sectional area that a stepped cavity middle part and an end are respectively equipped with a piston and middle part piston greater than with the sectional area of end piston; Be connected through a pipe link between the two-piston, be provided with the 3rd retracing spring between the piston at stepped cavity middle part and the stepped cavity end relative with it; Said self adaptation cylinder body middle part is provided with second inlet opening between two-piston, self adaptation cylinder body one side that is positioned at same end with the piston of stepped cavity end is provided with second fluid hole; Axial spacing between second inlet opening and second fluid hole is less than the spacing between the two-piston; The 7th braking path comprises path and underpass, and last path connects first overall channel and second inlet opening, and underpass connects second fluid hole and first overall channel.This programme is normally closed open form electromagnetic switch valve with the 4th electromagnetic switch valve, is when being out of order for fear of On-line Control is moving, and the high pressure oil in accumulation of energy chamber can not affacted by the first braking path and produce the mistake braking on the car side brake.Though with the 4th electromagnetic switch valve is normally closed open form electromagnetic switch valve, the setting through this programme can be implemented in brake-by-wire when breaking down, and can also realize conventional hydraulic braking.Because the setting of self adaptation on-off system when the line control brake system normal operation, is braked path in closing the 7th, to realize accumulation of energy when energy storage equipment is in energy accumulating state; When line control brake system is out of order, can open the 7th braking path certainly, to realize conventional hydraulic braking.
The beneficial effect of the utility model is:
1. not only can realize brake-by-wire, On-line Control is moved when breaking down, and can also realize conventional hydraulic braking; And productive costs is low, stopping distance is little, braking safety is high.
2. the pressure source that motor and pump is provided directly acts on master brake cylinder, realizes traditional master brake cylinder and the integrated design of pressure regulating unit, has improved the system modular degree.
3. remove the vacuum booster in the conventional hydraulic, reduced cost, reduced installing space.
4. what produce in the moving process of On-line Control makes us unjoyful vibration and can not be delivered to the integrated line control brake system of automobile on the brake pedal.
5. can realize energy storage equipment and master brake cylinder are combined as a whole, thereby reduce the brake system occupation space, reduce production costs; On-line Control is moved when breaking down simultaneously, can also realize conventional hydraulic braking.
Description of drawings
Fig. 1 is a kind of principle of work scheme drawing of the utility model embodiment 1.
Fig. 2 is a kind of structural representation of the master brake cylinder among the utility model embodiment 1.
Fig. 3 is a kind of principle of work scheme drawing of the utility model embodiment 2.
Fig. 4 is a kind of principle of work scheme drawing of the utility model embodiment 3.
Fig. 5 is a kind of structural representation of the master brake cylinder among the utility model embodiment 3.
Fig. 6 is a kind of structural representation of self adaptation on-off system conducting state of the utility model embodiment 3.
Fig. 7 is a kind of structural representation of self adaptation on-off system closed condition of the utility model embodiment 3.
Fig. 8 is a kind of structural representation among the utility model embodiment 4.
Among the figure: master brake cylinder 1; Brake pedal 2; Epitrochoidal chamber 3; Fluid infusion chamber 4; First retracing spring 5; Guide rod 6; The first fluid infusion hole 7; Pedal rod 8; Stroke sensor 9; Brake-fluid tank 10; Pump 11; Motor 12; The 3rd braking path 13; Second check valve 14; The 3rd check valve 15; The 4th braking path 16; The 3rd electromagnetic switch valve 17; Pressure sensor 18; Trample simulator 19; The 5th braking path 20; Second cavity 21; First cavity 22; Second retracing spring 23; The first braking path 24; The second braking path 25; Electronic control unit 26; Second electromagnetic switch valve 27; First electromagnetic switch valve 28; Car side brake 29; Velometer 30; First inlet opening 31; First fluid hole 32; End cover 33; Dust boot 34; Groove 35; Protruding 36; The 6th braking path 37; First check valve 38; Accumulation of energy chamber 39; Limiting valve 40; Four electromagnetic switch valves 41; Self adaptation on-off system 42; The 7th braking path 43; Stepped cavity 44; Pipe link 45; The 3rd retracing spring 46; Second inlet opening 47; Second fluid hole 48; Self adaptation cylinder body 49; Water conservancy diversion through hole 50; Energy-storaging spring 51; Inhibiting device 52; Stepped hole 55.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:
Embodiment 1: as shown in Figure 1, the integrated line control brake system of a kind of automobile comprises electronic control unit 26, brake-fluid tank 10, motor 12, pump 11, master brake cylinder 1, brake pedal 2, car side brake 29 and is used for the velometer 30 of inspection vehicle wheel speed.Brake pedal 2 is provided with stroke sensor 9.Piston both sides on the master brake cylinder 1 are provided with epitrochoidal chamber 3 and fluid infusion chamber 4.Be provided with first retracing spring 5 in the epitrochoidal chamber; Epitrochoidal chamber is provided with the pressure sensor 18 that is used for the testing cavity pressure.
One first braking path 24 connects master brake cylinder 1 and car side brake 29.First the braking path 24 comprise with epitrochoidal chamber 3 bonded assemblys, first overall channel and respectively with each car side brake 29 bonded assemblys first bypass passage.The first braking path 24 is provided with first electromagnetic switch valve 28; Be be respectively equipped with one first electromagnetic switch valve 28 on each first bypass passage, and first electromagnetic switch valve to be the open type electromagnetic switch valve specifically.One second braking path 25 connects car side brake 29 and brake-fluid tank 10, and it is used for after brake finishes fluid being back to brake-fluid tank.Second the braking path 25 comprise with brake-fluid tank 10 bonded assemblys, second overall channel and respectively with each car side brake 29 bonded assemblys second bypass passage.The second braking path 25 is provided with second electromagnetic switch valve 27; Be be respectively equipped with one second electromagnetic switch valve 27 on each second bypass passage, and second electromagnetic switch valve to be the closed type electromagnetic switch valve specifically.
Said pump 11 is between brake-fluid tank 10 and master brake cylinder 1 and be communicated with brake-fluid tank.Motor 12 is used for driving pump 11.One the 3rd braking path 13, it connects epitrochoidal chamber 3 and fluid infusion chamber 4 respectively by pump 11 outlets.Be that the 3rd braking path 13 comprises with pump 11 outlet bonded assembly the 3rd overall channels and respectively at epitrochoidal chamber 3 and fluid infusion chamber 4 bonded assemblys the 3rd bypass passage specifically.The 3rd overall channel and be provided with second check valve 14 and the 3rd check valve 15 that braking liquid can be flowed to epitrochoidal chamber by brake-fluid tank with epitrochoidal chamber bonded assembly the 3rd bypass passage.Because pump 22 is located between brake-fluid tank and the master brake cylinder, so just need not increase the hydraulic circuit of brake-by-wire, can greatly shorten the pipeline length of the hydraulic circuit of brake-by-wire, reduce stopping distance.On the other hand, the pressure source that motor and pump are provided directly acts on master brake cylinder, realizes traditional master brake cylinder and the integrated design of being made up of motor and pump of pressure regulating unit, has improved the system modular degree; Can cost-cutting, save the arrangement space of car inside brake system.
One the 4th braking path 16 connects fluid infusion chamber 4 and brake-fluid tank 10, the four braking paths 16 are provided with the 3rd electromagnetic switch valve 17 and the 3rd electromagnetic switch valve is the open type electromagnetic switch valve.Under the moving situation about breaking down of On-line Control; The 3rd electromagnetic switch valve through open type; Can the fluid infusion chamber be communicated with by the 4th braking path with brake-fluid tank, make the treadle effort of chaufeur better to be delivered on the car side brake, realize conventional hydraulic braking through epitrochoidal chamber.
As shown in Figure 1, the long-pending A of the piston cross-section that contacts with epitrochoidal chamber 3 is less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber 4.Be specifically, the piston rod of master brake cylinder 1 is positioned at fluid infusion chamber 4 one sides, is provided with a guide rod 6 coaxial with piston rod with epitrochoidal chamber 3 relative piston sides.Guide rod 6 runs through between cylinder body and the guide rod and the cylinder body of master brake cylinder and is provided with seal ring.Guide rod 6 cross-sectional areas make the long-pending A of the piston cross-section that contacts with epitrochoidal chamber 3 less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber 4 greater than the piston rod cross-sectional area of master brake cylinder.
Pedal rod 8 is hinged on the brake pedal 2.Pedal rod 8 is provided with an inhibiting device 52.Inhibiting device 52 can be one be arranged on pedal rod 8 belows pilot hole and the pedal rod 8 of the horizontally-guided cover that is provided with along pedal rod 8 of the horizontal guide slot that is provided with along pedal rod 8 of horizontal supporting plate or one or one and orienting sleeve between be provided with the gap.The purpose that inhibiting device 52 is provided with is: when pedal rod 8 with after the piston rod of master brake cylinder 1 separates, the effect that pedal rod 8 can not conducted oneself with dignity again produces rotation down; When chaufeur release brake pedal, after brake pedal resetted, pedal rod 8 can reset to initial horizontality under the effect of inhibiting device, the position relation between the piston rod end face of maintenance pedal rod 8 and master brake cylinder 1.
As shown in Figure 2, the end face of the cylinder body of master brake cylinder 1 is provided with a stepped hole, and the bore that is provided with two stage rank and stepped hole in the stepped hole is reduced toward interior by open end gradually.The stepped hole open end is provided with end cover 33.Be positioned at the stepped hole open end on the master brake cylinder 1 and also be provided with dust boot 34.The piston of master brake cylinder 1 is located in the stepped hole between the two stage rank.Said epitrochoidal chamber 3 is located between piston and the stepped hole bottom surface, and said fluid infusion chamber 4 is located between piston and the end cover 33.The piston rod of master brake cylinder 1 is positioned at fluid infusion chamber 4 one sides, is provided with a guide rod 6 coaxial with piston rod with epitrochoidal chamber 3 relative piston sides.Guide rod 6 runs through between cylinder body and the guide rod and the cylinder body of master brake cylinder and is provided with seal ring.Guide rod 6 cross-sectional areas make the long-pending A of the piston cross-section that contacts with epitrochoidal chamber 3 less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber 4 greater than the piston rod cross-sectional area of master brake cylinder.End cover 33 is provided with the first fluid infusion hole 7 that is communicated with fluid infusion chamber 4 with cylinder body between the adjacent step.The stepped hole bottom surface is provided with first inlet opening 31 and first fluid hole 32 that is communicated with epitrochoidal chamber 3 with cylinder body between the adjacent step.The first above-mentioned braking path 24 is communicated with car side brake 29 by first fluid hole 32.Above-mentioned the 3rd braking path 13, it connects the first fluid infusion hole 7 and first inlet opening 31 respectively by pump discharge.
As shown in Figure 1, above-mentioned brake pedal 2 is provided with tramples simulator 19.Trample simulator 19 and comprise hydraulic actuating cylinder, hydraulic cylinder piston rod is connected with brake pedal 2 through a push rod.Hydraulic actuating cylinder comprises first cavity 22 at its piston rod place and is positioned in second cavity, 21, the second cavitys of piston opposite side and is provided with second retracing spring 23.One the 5th braking path 20, it connects first cavity 22 and second cavity 21 respectively by epitrochoidal chamber 3; And the piston cross-section that contacts with first cavity 22 is long-pending long-pending less than the piston cross-section that contacts with second cavity 21.
The wheel speed signal of the displacement signal of displacement journey sensor 9, the pressure signal of pressure sensor 18, velometer 30 is transferred to electronic control unit 26 through data line respectively and connects; Electronic control unit is handled the signal that receives and motor 12 and each electromagnetic switch valve is controlled, thereby realizes brake-by-wire.When electronic control unit 26 detects the displacement signal of stroke sensor 9, explain that promptly chaufeur tramples brake pedal 2; This moment, electronic control unit 26 was closed the 3rd electromagnetic switch valve 17 on the 4th braking path 16; Control motor 12 work simultaneously, the driven by motor pump is set up the brake-pressure that adapts at the epitrochoidal chamber 3 of master brake cylinder 1 with fluid infusion chamber 4, is delivered to by the first braking path 24 and realizes braking on the car side brake 29.Pressure sensor 18 in braking procedure in the epitrochoidal chamber 3 of master brake cylinder 1 can real-time perception brake-pressures size, if reach preset value then motor quit work.Simultaneously; As shown in Figure 1; In the moving process of On-line Control, utilize under epitrochoidal chamber 3 and the 4 uniform pressure effects of fluid infusion chamber, different through the piston of master brake cylinder 1 with the active area in epitrochoidal chamber and fluid infusion chamber; Thereby the piston rod that the generation driving force difference makes master brake cylinder makes the piston rod connecting rod of master brake cylinder separate with pedal rod to left movement.Therefore what produce in the moving process of On-line Control makes us unjoyful vibration and can not be delivered on the brake pedal.
After chaufeur discharges brake-apply 2 fully; Electronic control unit controls motor 12 quits work at this moment; Open second electromagnetic switch valve 27 and three electromagnetic switch valve 17 four braking path 16 on of second braking on the path 25 simultaneously, make braking liquid by the second braking path 25 brake-fluid tank that refluxes back; Simultaneously master brake cylinder 1 is resetted under the effect of first retracing spring 5.
When the chaufeur emergency braking, electronic control unit 26 combines the wheel speed signal of velometer 30 detections and the displacement signal of stroke sensor 9, sets up the brake-pressure that adapt at the epitrochoidal chamber 3 of master brake cylinder 1 with fluid infusion chamber 4 through the driven by motor pump; If velometer 30 detects certain wheel lockup in this process; Because the braking path of each car side brake is separate; Therefore can open second electromagnetic switch valve 27 on second bypass passage of the corresponding second braking path 25; Lower the drg brake-pressure, solve the situation of wheel lockup, make full use of traction to guarantee each wheel.
When electronic control unit 26 breaks down when not working, the piston of master brake cylinder 1 can reset under the effect of first retracing spring 5.Because three electromagnetic switch valves 17 on the 4th braking path 16 are the open type electromagnetic switch valve, the braking liquid in the fluid infusion chamber can be replenished; While is because first electromagnetic switch valve 28 on the first braking path 24 is the open type electromagnetic switch valve, and second electromagnetic switch valve 27 on the second braking path 25 is the closed type electromagnetic switch valve; When chaufeur is trampled brake pedal 2, braking force can be delivered to through the first braking path 24 by epitrochoidal chamber and realize conventional hydraulic braking on the car side brake 29.Behind chaufeur loosen the brake 2, the piston of master brake cylinder 1 can reset under the effect of first retracing spring 5.
Embodiment 2: as shown in Figure 3, be provided with one the 6th braking path 37 between brake-fluid tank 10 and the master brake cylinder 1, and it connects brake-fluid tank 10 and fluid infusion chamber 4.The 6th braking path 37 is provided with a braking liquid can be by brake-fluid tank to the first mobile check valve 38 of fluid infusion chamber.All the other structures of present embodiment are with reference to embodiment 1.
When the moving system of On-line Control is out of order, specifically refer to, and motor 12 or pump 11 then can cooperate the conventional hydraulic braking of realization through the 6th braking path 37 and first check valve 38 when breaking down in electronic control unit 26 normal operation; The moving system works of On-line Control just often can not influence brake-by-wire simultaneously.Because the circulating direction of first check valve 38 is flowed to the fluid infusion chamber by brake-fluid tank, the braking liquid in the moving process of On-line Control in the fluid infusion chamber 4 can be back in the brake-fluid tank by the 6th braking path 37, therefore can not influence brake-by-wire.And in electronic control unit 26 normal operation, and motor 12 or pump 11 are when breaking down; When electronic control unit 26 detects the positive displacement signal of stroke sensor 9, can the 3rd electromagnetic switch valve 17 on the 4th braking path 16 be closed; If the braking liquid that does not have in 37 fluid infusion chambeies of the 6th braking path 4 can not get replenishing, therefore can't the treadle effort of chaufeur be delivered on the car side brake 29.
Embodiment 3: like Fig. 4, shown in Figure 5, an end of master brake cylinder 1 is provided with accumulation of energy chamber 39 and the accumulation of energy chamber is connected with epitrochoidal chamber 3.Be provided with piston and energy-storaging spring 51 in the accumulation of energy chamber 39.Be connected through some water conservancy diversion through holes 50 between accumulation of energy chamber 39 and the epitrochoidal chamber 3.Be arranged on guide rod on the piston of master brake cylinder and pass epitrochoidal chamber 3 and be positioned at the master brake cylinder outside, be provided with seal ring between the cylinder body of guide rod and master brake cylinder with accumulation of energy chamber 39.First fluid infusion hole 7 of master brake cylinder and the spacing L between end cover 33 inner end surfaces are greater than the piston thickness of master brake cylinder.
As shown in Figure 4, the first braking path 24 is provided with the 4th electromagnetic switch valve 41 that is used to control the first braking path break-make.Be that first overall channel of the first braking path 24 is provided with the 4th electromagnetic switch valve 41, and the 4th electromagnetic switch valve is normally closed open form electromagnetic switch valve specifically.The 3rd electromagnetic switch valve 17 that is provided with on the 4th braking path 16 is the open type electromagnetic switch valve.The 5th braking path 20 is provided with limiting valve 40, prevents that braking excessive in the epitrochoidal chamber from pressing to be delivered to trample on the simulator 19.Be provided with one the 6th braking path 37 between brake-fluid tank 10 and the master brake cylinder 1, it connects brake-fluid tank 10 and fluid infusion chamber 4.The 6th braking path 37 is provided with a braking liquid can be by brake-fluid tank to the first mobile check valve 38 of fluid infusion chamber.One self adaptation on-off system 42 is connected on first overall channel of the first braking path 24 with parallelly connected connection mode with the 4th electromagnetic switch valve 41 through the 7th braking path 43.
As shown in Figure 6, self adaptation on-off system 42 comprises a self adaptation cylinder body 49, and the internal cavity of self adaptation cylinder body is the stepped cavity 44 of narrowing toward each end broad in the middle.The sectional area that stepped cavity 44 middle parts and an end are respectively equipped with a piston and middle part piston greater than with the sectional area of end piston, be connected through a pipe link 45 between the two-piston.Be provided with the 3rd retracing spring 46 between the piston at stepped cavity middle part and the stepped cavity end relative with it.Self adaptation cylinder body 49 middle parts are provided with second inlet opening 47 between two-piston; Self adaptation cylinder body one side that is positioned at same end with the piston of stepped cavity end is provided with second fluid hole 48.Axial spacing between second inlet opening 47 and second fluid hole 48 is less than the spacing between the two-piston.The 7th braking path 43 comprises path and underpass, and last path connects first overall channel and second inlet opening of the first braking path 24, and underpass connects first overall channel of second fluid hole and the first braking path 24.All the other structures of present embodiment are with reference to embodiment 1.
Above-mentioned self adaptation on-off system 42 On-line Control have two states when moving system's normal operation: one of which; In accumulation of energy chamber 39 under 30% the state of accumulation of energy pressure smaller or equal to the capping value; Self adaptation on-off system 42 will be in conducting state; Just second inlet opening 47 and second fluid hole 48 be all between two-piston, and be as shown in Figure 6.Because under this state, the braking liquid in the self adaptation cylinder body 49 is not enough to customer service the 3rd retracing spring reset force to the right to its piston thrust left, promptly is not enough to customer service the 3rd retracing spring to its piston thrust to the right.
Its two, under 30% the state of accumulation of energy pressure greater than the capping value, self adaptation on-off system 42 will be in closed condition in accumulation of energy chamber 39, just second inlet opening 47 is between two-piston, and second fluid hole 48 is positioned at the two-piston outside, and is as shown in Figure 7.Because under this state, the braking liquid in the self adaptation cylinder body 49 greater than the 3rd retracing spring reset force to the right, promptly is enough to customer service the 3rd retracing spring to its piston thrust to the right to its piston thrust left.
The moving system of above-mentioned self adaptation on-off system 42 On-line Control breaks down and has only a kind of state when not working: self adaptation on-off system 42 will be in conducting state, just second inlet opening 47 and second fluid hole 48 all between two-piston, as shown in Figure 6.Because when by the treadle effort of chaufeur brake-pressure being provided, the brakings liquid in the self adaptation cylinder body 49 are not enough to customer service the 3rd retracing spring reset force to the right to its piston thrust left, promptly are not enough to customer service the 3rd retracing spring to its piston thrust to the right.
Because being located between brake-fluid tank 10 and the master brake cylinder 1 and braking path 13 through the 3rd, pump 11 was communicated with epitrochoidal chamber 3 and fluid infusion chamber 4 respectively; Therefore the end at master brake cylinder 1 is provided with accumulation of energy chamber 39, and accumulation of energy chamber 39 is communicated with epitrochoidal chamber 3, realizes energy storage equipment and master brake cylinder are combined as a whole with this, and then reduces the brake system occupation space.
Among the embodiment 3, the 4th electromagnetic switch valve 41 being made as normally closed open form electromagnetic switch valve, is for fear of being under the energy accumulating state in accumulation of energy chamber 39, the deceleration of electrons unit occurs and be out of order and do not work, and the mistake that produces braking.Because, be under the energy accumulating state, the deceleration of electrons unit occur and be out of order when not working, the mistake braking that can the accumulation of energy pressure transmission be produced to the car side brake in accumulation of energy chamber 39 if the 4th electromagnetic switch valve 41 is made as open form electromagnetic switch valve often.
The setting of self adaptation on-off system 42; Be when being out of order for On-line Control is moving; The 4th electromagnetic switch valve 41 can not the situation of conducting braking liquid under, braking liquid can be realized braking liquid is conducting to car side brake by epitrochoidal chamber 3 through self adaptation on-off system 42, to realize conventional hydraulic braking.
With the 3rd electromagnetic switch valve 17 that is provided with on the 4th braking path 16 is the open type electromagnetic switch valve, and the first fluid infusion hole 7 of master brake cylinder and the spacing L between end cover 33 inner end surfaces are greater than the piston thickness of master brake cylinder; Be to be under the energy accumulating state in order to be implemented in accumulation of energy chamber 39; The deceleration of electrons unit occurring is out of order when not working; Braking liquid in the fluid infusion chamber 4 can be back in the brake-fluid tank through the 4th braking path 16; Simultaneously owing to the piston thickness of the spacing L between the first fluid infusion hole 7 and end cover 33 inner end surfaces greater than master brake cylinder; Accumulation of energy chamber 39 also can be braked path 16 through the 4th by the first fluid infusion hole 7 with the braking liquid in the epitrochoidal chamber 3 and is back in the brake-fluid tank, eliminates the accumulation of energy pressure and makes self adaptation on-off system 42 be in conducting state, with conducting the 7th braking path 43.
As shown in Figure 4; The detailed process of accumulation of energy is following; Detect at electronic control unit 26 before the displacement signal of stroke sensor 9, promptly chaufeur is under the situation that does not have brake, and electronic control unit 26 can control the 3rd electromagnetic switch valve 17 and first electromagnetic switch valve 28 is closed.Open motor 12 then and through 11 pairs of epitrochoidal chambers of pump 3 and the pressurization of fluid infusion chamber, with this accumulation of energy in the accumulation of energy chamber, after the pressure that pressure sensor 18 detects epitrochoidal chamber 3 reached setting value, disable motor stopped accumulation of energy.
The course of action of self adaptation on-off system 42 is following in the process of this accumulation of energy: when the pressure in the accumulation of energy chamber at 30% when following of setting value; The brake fluid pressure that adapts in the cylinder body 49 is not enough to the reset force of customer service the 3rd retracing spring to the thrust of its piston, and it is as shown in Figure 6 that self adaptation on-off system 42 is in conducting state.When the pressure in the accumulation of energy chamber at 30% when above of setting value, adapt to brake fluid pressure in the cylinder body 49 greater than the reset force of the 3rd retracing spring, it is as shown in Figure 7 that self adaptation on-off system 42 is in closed condition, cuts off the 7th braking path 43 with this.
As shown in Figure 4, under the moving out-of-run situation that is out of order of On-line Control, the 3rd electromagnetic switch valve 17 at first recovers normally open, makes that the braking liquid in the fluid infusion chamber is back in the brake-fluid tank 10 through the 4th braking path 16; Owing to the piston thickness of the spacing L between the first fluid infusion hole 7 and end cover 33 inner end surfaces greater than master brake cylinder, accumulation of energy chamber 39 also can be back to through the 4th braking path 16 by the first fluid infusion hole 7 with epitrochoidal chamber 3 interior brakings liquid and eliminate the accumulation of energy pressure in the brake-fluid tank simultaneously; Make self adaptation on-off system 42 be in state as shown in Figure 6 with conducting the 7th braking path 43.When chaufeur is trampled brake pedal; The insufficient pressure that is provided by treadle effort is to overcome the reset force of the 3rd retracing spring 46 in the self adaptation on-off system 42 this moment; Therefore self adaptation on-off system 42 can be under the conducting state state as shown in Figure 6 always in the process of conventional hydraulic braking, with conducting the 7th braking path 43.Therefore treadle effort can be delivered to by the 7th braking path 43 and the first braking path 24 through epitrochoidal chamber 3 and realize conventional hydraulic braking on the car side brake.
During the moving normal operation of On-line Control, when electronic control unit 26 detects the positive displacement signal of stroke sensor 9, explain that promptly chaufeur tramples brake pedal 2; This moment, the normally open of first electromagnetic switch valve 28 is opened and recovered to electronic control unit controls the 4th electromagnetic switch valve 41, makes machine operation simultaneously, and then realize brake-by-wire.
Claims (10)
1. the integrated line control brake system of automobile comprises electronic control unit (26), brake-fluid tank (10), pump (11), master brake cylinder (1), car side brake (29) and brake pedal (2); Brake pedal is provided with stroke sensor (9); One first braking path (24) connects master brake cylinder and car side brake, and the first braking path is provided with first electromagnetic switch valve (28); One second braking path (25) connects car side brake and brake-fluid tank; The second braking path is provided with second electromagnetic switch valve (27); It is characterized in that; Piston both sides on the said master brake cylinder (1) are provided with epitrochoidal chamber (3) and fluid infusion chamber (4), are provided with first retracing spring (6) in the epitrochoidal chamber; Said pump (11) is between brake-fluid tank and master brake cylinder and be communicated with brake-fluid tank; One the 3rd braking path (13), it connects epitrochoidal chamber and fluid infusion chamber respectively by pump discharge; One the 4th braking path (16) connects fluid infusion chamber and brake-fluid tank, and the 4th braking path is provided with the 3rd electromagnetic switch valve (17) of open type.
2. the integrated line control brake system of a kind of automobile according to claim 1; It is characterized in that; The said first braking path (24) comprise with epitrochoidal chamber (3) bonded assembly first overall channel and respectively with each car side brake (29) bonded assembly first bypass passage, said first electromagnetic switch valve (28) is for the open type electromagnetic switch valve and be located at respectively on each first bypass passage; The second braking path (25) comprise with brake-fluid tank (10) bonded assembly second overall channel and respectively with each car side brake (29) bonded assembly second bypass passage, second electromagnetic switch valve (27) is for the closed type electromagnetic switch valve and be located at respectively on each second bypass passage.
3. the integrated line control brake system of a kind of automobile according to claim 1 is characterized in that, the long-pending A of the piston cross-section that contacts with epitrochoidal chamber (3) on the master brake cylinder is less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber (4); Said brake pedal is provided with the pedal rod (8) relative with the piston rod of master brake cylinder, is provided with the gap between the end of said pedal rod and the piston rod end face or is resisted against on the piston rod end face.
4. the integrated line control brake system of a kind of automobile according to claim 1; It is characterized in that; The piston rod of master brake cylinder is positioned at fluid infusion chamber (4) one sides; The piston side relative with epitrochoidal chamber (3) is provided with a guide rod (6) coaxial with piston rod, and guide rod runs through between cylinder body and the guide rod and the cylinder body of master brake cylinder and is provided with seal ring; Said guide rod cross-sectional area is greater than the piston rod cross-sectional area.
5. the integrated line control brake system of a kind of automobile according to claim 4; It is characterized in that; The end face of the cylinder body of master brake cylinder (1) is provided with a stepped hole; The bore that is provided with two stage rank and stepped hole in the stepped hole is reduced toward interior by open end gradually, and the stepped hole open end is provided with end cover (33); The piston of master brake cylinder is located in the stepped hole between the two stage rank, and said epitrochoidal chamber (3) is located between piston and the stepped hole bottom surface, and said fluid infusion chamber (4) is located between piston and the end cover; Said end cover (33) is provided with the first fluid infusion hole (7) that is communicated with fluid infusion chamber (4) with master cylinder body between the adjacent step, and said stepped hole bottom surface is provided with first inlet opening (31) and first fluid hole (32) that is communicated with epitrochoidal chamber (3) with master cylinder body between the adjacent step.
6. the integrated line control brake system of a kind of automobile according to claim 1 is characterized in that, said brake pedal (2) is provided with tramples simulator (19), tramples simulator and comprises hydraulic actuating cylinder, and hydraulic cylinder piston rod one push rod is connected with brake pedal; Hydraulic actuating cylinder comprises first cavity (22) at piston rod place and is positioned at second cavity (21) of piston opposite side, is provided with second retracing spring (23) in second cavity; One the 5th braking path (20), it connects first cavity and second cavity respectively by epitrochoidal chamber; And the piston cross-section that contacts with first cavity (22) is long-pending long-pending less than the piston cross-section that contacts with second cavity (21).
7. according to claim 1 or 2 or 3 or 4 or the 5 or 6 integrated line control brake systems of described a kind of automobile; It is characterized in that; One the 6th braking path (37); It connects brake-fluid tank (10) and fluid infusion chamber (4), and said the 6th braking path is provided with a braking liquid can be by brake-fluid tank to mobile first check valve (38) in fluid infusion chamber.
8. according to claim 1 or 2 or 3 or 4 or the 5 or 6 integrated line control brake systems of described a kind of automobile, it is characterized in that said epitrochoidal chamber (3) is provided with pressure sensor (18); Said the 3rd braking path (13) comprises and pump discharge bonded assembly the 3rd overall channel and respectively at epitrochoidal chamber and fluid infusion chamber bonded assembly the 3rd bypass passage, the 3rd overall channel and be provided with second check valve (14) and the 3rd check valve (15) that braking liquid can be flowed to epitrochoidal chamber by brake-fluid tank with epitrochoidal chamber bonded assembly the 3rd bypass passage.
9. the integrated line control brake system of a kind of automobile according to claim 8 is characterized in that, an end of master brake cylinder (1) is provided with accumulation of energy chamber (39) and the accumulation of energy chamber is connected with epitrochoidal chamber (3), is provided with piston and energy-storaging spring (51) in the accumulation of energy chamber; The first braking path (24) is provided with the 4th electromagnetic switch valve (41) that is used to control the first braking path break-make.
10. the integrated line control brake system of a kind of automobile according to claim 9 is characterized in that, said the 4th electromagnetic switch valve (41) is normally closed open form electromagnetic switch valve; One self adaptation on-off system (42) is connected on the first braking path (24) with parallelly connected connection mode with the 4th electromagnetic switch valve (41) through the 7th braking path (43); Said self adaptation on-off system (42) comprises a self adaptation cylinder body (49); The internal cavity of self adaptation cylinder body is the stepped cavity (44) of narrowing toward each end broad in the middle; The sectional area that a stepped cavity middle part and an end are respectively equipped with a piston and middle part piston greater than with the sectional area of end piston, be connected through a pipe link (45) between the two-piston; Be provided with the 3rd retracing spring (46) between the piston at stepped cavity middle part and the stepped cavity end relative with it; Said self adaptation cylinder body middle part is provided with second inlet opening (47) between two-piston, self adaptation cylinder body one side that is positioned at same end with the piston of stepped cavity end is provided with second fluid hole (48); Axial spacing between second inlet opening (47) and second fluid hole (48) is less than the spacing between the two-piston; The 7th braking path comprises path and underpass, and last path connects the first braking path and second inlet opening, and underpass connects second fluid hole and the first braking path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220094978 CN202508078U (en) | 2012-03-14 | 2012-03-14 | Automobile integrated brake-by-wire system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220094978 CN202508078U (en) | 2012-03-14 | 2012-03-14 | Automobile integrated brake-by-wire system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202508078U true CN202508078U (en) | 2012-10-31 |
Family
ID=47060578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220094978 Expired - Fee Related CN202508078U (en) | 2012-03-14 | 2012-03-14 | Automobile integrated brake-by-wire system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202508078U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103010199A (en) * | 2012-12-27 | 2013-04-03 | 清华大学 | Brake-by-wire system of automobile |
| CN103303289A (en) * | 2012-03-14 | 2013-09-18 | 浙江万向精工有限公司 | Automobile integrated brake-by-wire system |
| CN104709260A (en) * | 2013-12-12 | 2015-06-17 | 株式会社万都 | Hydraulic unit of brake system |
| CN109185366A (en) * | 2018-10-12 | 2019-01-11 | 合肥工业大学 | A kind of line control brake system of hydraulic regulating |
| CN114893518A (en) * | 2022-05-10 | 2022-08-12 | 南京弹簧有限公司 | Brake actuating device with spring |
-
2012
- 2012-03-14 CN CN 201220094978 patent/CN202508078U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303289A (en) * | 2012-03-14 | 2013-09-18 | 浙江万向精工有限公司 | Automobile integrated brake-by-wire system |
| CN103303289B (en) * | 2012-03-14 | 2016-02-17 | 浙江万向精工有限公司 | The integrated line control brake system of a kind of automobile |
| CN103010199A (en) * | 2012-12-27 | 2013-04-03 | 清华大学 | Brake-by-wire system of automobile |
| CN103010199B (en) * | 2012-12-27 | 2014-12-10 | 清华大学 | Brake-by-wire system of automobile |
| CN104709260A (en) * | 2013-12-12 | 2015-06-17 | 株式会社万都 | Hydraulic unit of brake system |
| CN109185366A (en) * | 2018-10-12 | 2019-01-11 | 合肥工业大学 | A kind of line control brake system of hydraulic regulating |
| CN114893518A (en) * | 2022-05-10 | 2022-08-12 | 南京弹簧有限公司 | Brake actuating device with spring |
| CN114893518B (en) * | 2022-05-10 | 2023-08-15 | 南京弹簧有限公司 | Brake actuating device with spring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202508078U (en) | Automobile integrated brake-by-wire system | |
| CN105691372B (en) | Electric brake system | |
| CN108501921B (en) | A kind of hydraulic line control brake system and its brake control method with double pressure sources | |
| CN202508079U (en) | Automobile brake apparatus | |
| US10029659B2 (en) | Electrohydraulic motor vehicle brake system and method for operating the same | |
| CN103303282A (en) | Vehicle brake system | |
| CN103303289B (en) | The integrated line control brake system of a kind of automobile | |
| KR20150132453A (en) | Vehicle brake system with dual acting plunger assembly | |
| WO2010094489A3 (en) | Braking system for a land vehicle with regenerative braking functionality | |
| CN103303281B (en) | Integrated line control brake system | |
| CN203766754U (en) | Separating type brake master cylinder assembly with driving hydraulic power assistance and driven hydraulic power assistance | |
| CN103318158A (en) | Integrated electronic hydraulic brake system of automobile | |
| CN105793129A (en) | Electro-hydraulic motor vehicle brake system and method for operation thereof | |
| CN105523024A (en) | Hydraulic unit of electronic control brake system | |
| CN202510595U (en) | Brake master cylinder assembly | |
| CN202508084U (en) | Integrated brake-by-wire system | |
| CN102039884A (en) | Hydraulic anti-locking braking device | |
| US10023168B2 (en) | Hydraulic power unit and braking system for a vehicle | |
| CN101922524A (en) | Enclosed multi-disc wet type braking device | |
| CN202508080U (en) | Brake system of vehicle | |
| CN104955694A (en) | Master brake cylinder for a hydraulic motor vehicle brake system | |
| KR20100057893A (en) | Electrohydraulic brake unit for a land vehicle | |
| CN204250014U (en) | Integrate motor electric control braking master cylinder drive system | |
| CN110167804B (en) | Hydraulic brake system for vehicle | |
| CN203255178U (en) | Integrated braking master cylinder assembly capable of being used for flexibly setting brake pedal sense |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20190314 |