CN202508084U - Integrated brake-by-wire system - Google Patents
Integrated brake-by-wire system Download PDFInfo
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- CN202508084U CN202508084U CN 201220095919 CN201220095919U CN202508084U CN 202508084 U CN202508084 U CN 202508084U CN 201220095919 CN201220095919 CN 201220095919 CN 201220095919 U CN201220095919 U CN 201220095919U CN 202508084 U CN202508084 U CN 202508084U
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Abstract
The utility model discloses an integrated brake-by-wire system, and aims to provide a brake system which can realize brake-by-wire and realize normal hydraulic brake when brake-by-wire fails and has the characteristics of short brake distance and small occupied space. The brake system comprises an electronic control unit, a brake liquid tank, a pump, a brake main cylinder, a wheel brake and a brake pedal, wherein a travel sensor is arranged on the brake pedal; a first brake passageway is connected with the brake main cylinder and the wheel brake; a second brake passageway is connected with the wheel brake and the brake liquid tank; a working cavity and a liquid compensation cavity are formed on two sides of a piston on the brake main cylinder; a first resetting spring is arranged in the working cavity; the pump is positioned between the brake liquid tank and the brake main cylinder and communicated with the brake liquid tank; a third brake passageway is respectively connected to the working cavity and the liquid compensation cavity through an outlet of the pump; a fourth brake passageway is connected with the liquid compensation cavity and the brake liquid tank; and a third electromagnetic switch valve is arranged on the fourth brake passageway.
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 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.Simultaneously in the deceleration of electrons brake system, promptly during the brake-by-wire normal operation, trample effect more really in order to improve to have when chaufeur is trampled brake pedal, can be provided with one usually and trample simulator.Improved the authenticity of trampling effect though trample simulator, it has not only increased productive costs, also can further take automobile originally with regard to limited space.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: 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, increased the hydraulic circuit that is communicated with the brake-by-wire of car side brake by brake-fluid tank, and pump has been 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 that productive costs is low, stopping distance is little, safe.
Second purpose of the utility model is in order to overcome when brake-by-wire combines with hydraulic brake system; When improving that chaufeur is trampled brake pedal in the brake-by-wire process; Have and trample effect more really and be provided with to such an extent that trample simulator, not only increased productive costs, also can take automobile originally with regard to the problem in limited space; When providing a kind of brake-by-wire to combine with hydraulic brake system; Can also trample effect more really for chaufeur provides in the moving process of the master brake cylinder On-line Control of hydraulic brake system, thereby eliminate the setting of trampling simulator, reduce productive costs and reduced the integrated line control brake system that brake system takes up room.
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:
A kind of integrated line control brake system 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 rod on the said master brake cylinder is connected with brake pedal; 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; On-line Control is moving when breaking down, and the fluid infusion chamber is communicated with brake-fluid tank through the 4th braking path, so 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 piston rod of master brake cylinder is positioned at fluid infusion chamber one side; The long-pending A of the piston cross-section that contacts with epitrochoidal chamber is greater than the long-pending B of the piston cross-section that contacts with the fluid infusion chamber.Realize that at electronic control unit the stroke of trampling brake pedal when chaufeur is big more in the process of brake-by-wire, the braking that pump provides is pressed also big more accordingly.Because pump is braked epitrochoidal chamber and the fluid infusion chamber that path connects master brake cylinder respectively through the 3rd, promptly epitrochoidal chamber is identical with the pressure in fluid infusion chamber in the process of pump work; Simultaneously because the long-pending A of the piston cross-section that this programme contacts with epitrochoidal chamber amasss B greater than the piston cross-section that contacts with the fluid infusion chamber; Therefore to trample the stroke of brake pedal big more when chaufeur; Epitrochoidal chamber inside brake liquid also can be big more to the difference of pressure of the pressure of piston to the pressure of piston and fluid infusion chamber inside brake liquid; The pedal force that need provide when chaufeur is trampled is also big more, realizes the effect of trampling that is virtually reality like reality with this.Through the structure of this programme, can realize can trampling effect more really for chaufeur provides in the moving process of master brake cylinder On-line Control, thereby avoid trampling the setting of simulator, reduced productive costs and reduced brake system taking up room.
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 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, 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, 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, an end of master brake cylinder is provided with the accumulation of energy chamber; Be provided with a dividing plate between accumulation of energy chamber and the epitrochoidal chamber; Dividing plate is provided with the water conservancy diversion through hole and is communicated with accumulation of energy chamber and epitrochoidal chamber; Be provided with the 4th check valve that braking liquid can be flowed to the accumulation of energy chamber by epitrochoidal chamber in the said water conservancy diversion through hole; Be provided with piston and energy-storaging spring in the accumulation of energy chamber; One the 7th braking path is communicated with the accumulation of energy chamber and the first braking path, and the 7th braking path is provided with the 4th electromagnetic switch valve.Because the end of master brake cylinder is provided with the accumulation of energy chamber, the braking liquid in the epitrochoidal chamber can flow to the accumulation of energy chamber through the water conservancy diversion through hole; When accumulation of energy, the 3rd electromagnetic switch valve and the 4th electromagnetic switch valve are closed, through pump epitrochoidal chamber and fluid infusion chamber are pressurizeed then, and then carry out accumulation of energy through electronic control unit; Braking in pressure sensor detects epitrochoidal chamber is pressed when reaching the higher limit of setting, and electronic control unit can be controlled motor and quit work, and accomplishes the accumulation of energy to the accumulation of energy chamber this moment.The 4th check valve is set in the water conservancy diversion through hole on the other hand, be for fear of the accumulation of energy chamber after accomplishing accumulation of energy, the braking pressure the accumulation of energy chamber in is delivered to epitrochoidal chamber; Guarantee to be out of order can't realize brake-by-wire the time at electronic control unit, the piston of master brake cylinder can be by dieback; And then can also realize conventional hydraulic braking.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 piston side relative with epitrochoidal chamber is provided with a guide rod coaxial with the piston rod of master brake cylinder; The piston that guide rod runs through in epitrochoidal chamber, dividing plate, accumulation of energy chamber and the accumulation of energy chamber successively is positioned at the master brake cylinder outside, is respectively equipped with seal ring between the piston in said guide rod and dividing plate, the accumulation of energy chamber and the cylinder body of master brake cylinder; Said guide rod cross-sectional area is identical with the piston rod cross-sectional area.Because the guide rod cross-sectional area is identical with the piston rod cross-sectional area; Make pump can reach a balance to the piston institute applied pressure of master brake cylinder; Therefore can not have influence on the effect of trampling of brake pedal in the moving process of On-line Control, especially in the accumulation of energy process, can not have influence on the effect of trampling of brake pedal.
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 stationary links; 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; Said the 5th braking path is provided with limiting valve; 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 on the piston side relative, be provided with a guide rod coaxial, and the guide rod cross-sectional area is identical with the piston rod cross-sectional area with the piston rod of master brake cylinder with epitrochoidal chamber; Make the simulate effect of trampling of master brake cylinder lose efficacy, therefore be provided with and trample simulator, trample sensation really for the brake-by-wire process provides a kind of being similar to.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, the 4th electromagnetic switch valve is normally closed open form electromagnetic switch valve; One interlock on-off system is connected the 7th braking path and first through the 8th braking path and the 4th electromagnetic switch valve with parallelly connected connection mode and brakes on the path, and said interlock on-off system comprises the break-make cylinder body and the break-make cylinder body and the coaxial setting of guide rod that fixedly install; Be provided with two coupled pistons in the break-make cylinder body, be connected through a pipe link between two coupled pistons, said guide rod is connected with a coupled piston; Said break-make cylinder body middle part is provided with second inlet opening between two coupled pistons, the break-make cylinder body between the coupled piston that said break-make cylinder body end is adjacent is provided with second fluid hole; Axial spacing between second inlet opening and second fluid hole is less than the spacing between two coupled pistons; Be provided with the 3rd retracing spring between the terminal and coupled piston that is adjacent of said break-make cylinder body; The 7th braking path comprises path and underpass, and last path connects the 6th braking path and second inlet opening, and underpass connects second fluid hole and the first braking path.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 hydraulic brake fluid in accumulation of energy chamber can not affacted by the 6th braking path and the first braking path and produce mistake on the car side brake and brake.Simultaneously; The setting of interlock on-off system; Make when line control brake system is out of order, under the hydraulic braking state of routine, also can the high hydraulic brake fluid in the accumulation of energy chamber be affacted and produce braking effect on the car side brake through interlock on-off system conducting the 8th braking path.
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. can trample effect more really for chaufeur provides in the moving process of the master brake cylinder On-line Control of hydraulic brake system, thereby eliminate the setting of trampling simulator, reduce productive costs and reduced the brake system occupation space.
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 the interlock on-off system of the utility model embodiment 3.
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; 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; 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 8th braking path 43; Coupled piston 44; Pipe link 45; The 3rd retracing spring 46; Second inlet opening 47; Second fluid hole 48; Break-make cylinder body 49; Water conservancy diversion through hole 50; Energy-storaging spring 51; The 4th check valve 52; The 7th braking path 53; Dividing plate 54; The 3rd fluid 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, a kind of integrated line control brake system 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 rod on the master brake cylinder 1 is connected with brake pedal 2; Be specifically, brake pedal 2 is provided with the pedal rod relative with the piston rod of master brake cylinder 1, and pedal rod is hinged on the brake pedal 2.The piston rod outer face of master brake cylinder 1 is provided with a counterbore and the counterbore bottom surface is the groove that is semi-spherical shape.The internal diameter in less hole is also greater than the diameter of pedal rod in the said counterbore.The end of pedal rod is provided with the ball-shaped convexity, and pedal rod is arranged in the counterbore, and said convexity is positioned at groove.
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 2, the piston rod of master brake cylinder is positioned at fluid infusion chamber 4 one sides.The long-pending A of the piston cross-section that contacts with epitrochoidal chamber 3 is greater than the long-pending B of the piston cross-section that contacts with fluid infusion chamber 4.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.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 cylinder body of the master brake cylinder between stepped hole bottom surface and the adjacent step is provided with first inlet opening 31 and first fluid hole 32 that is communicated with epitrochoidal chamber 3.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.
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 positive 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.
Realize that at electronic control unit 26 stroke of trampling brake pedal 2 when chaufeur is big more in the process of brake-by-wire, the braking that pump provides is pressed also big more accordingly.Because pump 11 is braked epitrochoidal chamber and the fluid infusion chamber that path connects master brake cylinder respectively through the 3rd, promptly epitrochoidal chamber is identical with the pressure in fluid infusion chamber in the process of pump work.Because the piston cross-section that contacts with epitrochoidal chamber 3 on the master brake cylinder 1 of present embodiment is long-pending long-pending greater than the piston cross-section that contacts with fluid infusion chamber 4; Therefore to trample the stroke of brake pedal big more when chaufeur; Epitrochoidal chamber inside brake liquid also can be big more to the difference of pressure of the pressure of piston to the pressure of piston and fluid infusion chamber inside brake liquid; The pedal force that need provide when chaufeur is trampled is also big more, realizes the effect of trampling that is virtually reality like reality with this.
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, because three electromagnetic switch valves 17 on the 4th braking path 16 are the open type electromagnetic switch valve, the piston of master brake cylinder 1 can reset under the effect of first retracing spring 5.Simultaneously, 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 strength of one's legs of chaufeur be delivered on the car side brake 29.
Embodiment 3: shown in Figure 5, an end of master brake cylinder 1 is provided with accumulation of energy chamber 39.Be provided with a dividing plate 54 between accumulation of energy chamber and the epitrochoidal chamber 3; Dividing plate is provided with water conservancy diversion through hole 50 and is communicated with accumulation of energy chamber and epitrochoidal chamber.Be provided with the 4th check valve 52 that braking liquid can be flowed to accumulation of energy chamber 39 by epitrochoidal chamber 3 in the said water conservancy diversion through hole 50.Be provided with piston and energy-storaging spring 51 in the accumulation of energy chamber.The cylinder body that is positioned at the master brake cylinder at place, accumulation of energy chamber is provided with one the 3rd fluid hole 55.Be provided with a guide rod 6 coaxial with epitrochoidal chamber 3 relative piston sides with the piston rod of master brake cylinder 1.The piston that guide rod 6 runs through in epitrochoidal chamber 3, dividing plate 54, accumulation of energy chamber and the accumulation of energy chamber successively is positioned at the master brake cylinder outside, is respectively equipped with seal ring between the piston in said guide rod and dividing plate, the accumulation of energy chamber and the cylinder body of master brake cylinder.Said guide rod 6 cross-sectional areas are identical with the piston rod cross-sectional area.
As shown in Figure 4, brake pedal 2 is provided with tramples simulator 19.Trample simulator 19 and comprise hydraulic actuating cylinder, hydraulic cylinder piston rod is connected through the piston rod of stationary links with the master brake cylinder that is positioned at master brake cylinder 1 outside.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 5th braking path 20 is provided with limiting valve 40, prevents in the accumulation of energy process that braking excessive in the epitrochoidal chamber 3 presses to be delivered to trample on the simulator 19.
Like Fig. 4, shown in Figure 6, one the 7th braking path 53 is communicated with first overall channel of the accumulation of energy chamber and the first braking path 24.Be that the 7th braking path 53 is communicated with first overall channel of the 3rd fluid hole 55 and the first braking path 24 specifically.The 7th braking path is provided with the 4th electromagnetic switch valve 41.The 4th electromagnetic switch valve 41 is normally closed open form electromagnetic switch valve.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 interlock on-off system 42 is connected on the 7th braking path 53 and the first braking path 24 with parallelly connected connection mode with the 4th electromagnetic switch valve 41 through the 8th braking path 43.Interlock on-off system 42 comprises the break-make cylinder body 49 and the break-make cylinder body and guide rod 6 coaxial settings that fixedly install.Be provided with in the break-make cylinder body 49 between two coupled piston 44, two coupled pistons and be connected through a pipe link 45, said guide rod 6 is connected with a coupled piston.Break-make cylinder body 49 middle parts are provided with second inlet opening 47 between two coupled pistons.Break-make cylinder body between the coupled piston that break-make cylinder body 49 ends are adjacent 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 two coupled pistons.Be provided with the 3rd retracing spring 46 between the coupled piston that said break-make cylinder body end is adjacent.The 8th braking path 43 comprises path and underpass, and last path connects the 7th braking path 53 and second inlet opening 47, and underpass connects second fluid hole 48 and the first braking path.All the other structures of present embodiment are with reference to embodiment 1.
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 interlock on-off system 42 is 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; When the hydraulic braking of routine, can also the high pressure braking force in the accumulation of energy chamber be affacted on the car side brake 29 through interlock on-off system 42 conductings the 8th braking path 43 and produce braking effect.
As shown in Figure 4, the detailed process of accumulation of energy is following, detects at electronic control unit 26 before the displacement signal of stroke sensor 9, and promptly chaufeur is under the situation that does not have brake, and electronic control unit 26 can control the 3rd electromagnetic switch valve 17.Open motor 12 then and through 11 pairs of epitrochoidal chambers of pump 3 and 4 pressurizations of fluid infusion chamber, with this accumulation of energy in accumulation of energy chamber 39, after the pressure that pressure sensor 18 detects epitrochoidal chamber 3 reached the capping value, disable motor stopped accumulation of energy.
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, electronic control unit controls the 4th electromagnetic switch valve 41 was opened; Make machine operation simultaneously, and then realize brake-by-wire.
Under the moving out-of-run situation that is out of order of On-line Control; When chaufeur is trampled brake pedal 2; As shown in Figure 4, the piston of master brake cylinder 1 can promote guide rod 6 to left movement, and then the coupled piston 44 of promotion interlock on-off system 42 is to left movement; Thereby make second inlet opening 47 and second fluid hole 48 between two coupled pistons 44, with this conducting the 8th braking path 43; High pressure in accumulation of energy chamber braking pressed to affact on the car side brake 29 produce braking effect.The while chaufeur is trampled the strength of one's legs of brake pedal 2 also can pass through epitrochoidal chamber 3, is affacted on the car side brake 29 by the first interior first braking path 24 and produces braking effect.
Claims (10)
1. an integrated line control brake system comprises electronic control unit (26), brake-fluid tank (10), pump (11), motor (12) master brake cylinder (1), car side brake (29) and brake pedal (2); Brake pedal is provided with stroke sensor (9), and 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, and the second braking path is provided with second electromagnetic switch valve (27), it is characterized in that the piston rod on the said master brake cylinder (1) is connected with brake pedal (2); 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. integrated line control brake system according to claim 1 is characterized in that, the piston rod of master brake cylinder is positioned at fluid infusion chamber (4) one sides; The long-pending A of the piston cross-section that contacts with epitrochoidal chamber (3) is greater than the long-pending B of the piston cross-section that contacts with fluid infusion chamber (4).
3. integrated line control brake system 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.
4. integrated line control brake system according to claim 1; It is characterized in that; 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, 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.
5. integrated line control brake system according to claim 1 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.
6. according to claim 1 or 2 or 3 or 4 or 5 described integrated line control brake systems; 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.
7. according to claim 1 or 2 or 3 or 4 or 5 described integrated line control brake systems, it is characterized in that an end of master brake cylinder (1) is provided with accumulation of energy chamber (39); Be provided with a dividing plate (54) between accumulation of energy chamber and the epitrochoidal chamber (3); Dividing plate is provided with water conservancy diversion through hole (50) and is communicated with accumulation of energy chamber and epitrochoidal chamber; Be provided with the 4th check valve (52) that braking liquid can be flowed to the accumulation of energy chamber by epitrochoidal chamber in the said water conservancy diversion through hole (50); Be provided with piston and energy-storaging spring (51) in the accumulation of energy chamber; One the 7th braking path (53) is communicated with the accumulation of energy chamber and the first braking path (24), and the 7th braking path is provided with the 4th electromagnetic switch valve (41).
8. integrated line control brake system according to claim 7; It is characterized in that; The piston side relative with epitrochoidal chamber (3) is provided with a guide rod (6) coaxial with the piston rod of master brake cylinder; The piston that guide rod runs through in epitrochoidal chamber (3), dividing plate (54), accumulation of energy chamber and the accumulation of energy chamber successively is positioned at the master brake cylinder outside, is respectively equipped with seal ring between the piston in said guide rod and dividing plate, the accumulation of energy chamber and the cylinder body of master brake cylinder; Said guide rod (6) cross-sectional area is identical with the piston rod cross-sectional area.
9. integrated line control brake system according to claim 8; It 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 is connected through the piston rod of stationary links with master brake cylinder (1); 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; Said the 5th braking path is provided with limiting valve; 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).
10. integrated line control brake system according to claim 8 is characterized in that, said the 4th electromagnetic switch valve (41) is normally closed open form electromagnetic switch valve; One interlock on-off system (42) is connected seven braking path (53) and first with the 4th electromagnetic switch valve (41) with parallelly connected connection mode through the 8th braking path (43) and brakes on the path (24), and said interlock on-off system (42) comprises the break-make cylinder body (49) and the break-make cylinder body and the coaxial setting of guide rod (6) that fixedly install; Be provided with two coupled pistons (44) in the break-make cylinder body, be connected through a pipe link (45) between two coupled pistons, said guide rod (6) is connected with a coupled piston; Said break-make cylinder body middle part is provided with second inlet opening (47) between two coupled pistons, the break-make cylinder body between the coupled piston that said break-make cylinder body end is adjacent 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 two coupled pistons; Be provided with the 3rd retracing spring (46) between the terminal and coupled piston that is adjacent of said break-make cylinder body; The 8th braking path (43) comprises path and underpass, and last path connects the 7th braking path (53) and second inlet opening (47), and underpass connects second fluid hole (48) and the first braking path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220095919 CN202508084U (en) | 2012-03-14 | 2012-03-14 | Integrated brake-by-wire system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220095919 CN202508084U (en) | 2012-03-14 | 2012-03-14 | Integrated brake-by-wire system |
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| Publication Number | Publication Date |
|---|---|
| CN202508084U true CN202508084U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220095919 Expired - Fee Related CN202508084U (en) | 2012-03-14 | 2012-03-14 | Integrated brake-by-wire system |
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| CN (1) | CN202508084U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303281A (en) * | 2012-03-14 | 2013-09-18 | 浙江万向精工有限公司 | Integrated brake-by-wire system |
| CN104309594A (en) * | 2014-09-28 | 2015-01-28 | 浙江万向精工有限公司 | Auxiliary hydraulic brake regulating unit system |
| CN105270375A (en) * | 2015-10-27 | 2016-01-27 | 浙江万向精工有限公司 | Brake-by-wire and pedal-force feedback system and braking method |
| CN106427964A (en) * | 2016-02-05 | 2017-02-22 | 芜湖伯特利汽车安全系统股份有限公司 | Control-by-wire hydraulic braking system and control method thereof |
-
2012
- 2012-03-14 CN CN 201220095919 patent/CN202508084U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303281A (en) * | 2012-03-14 | 2013-09-18 | 浙江万向精工有限公司 | Integrated brake-by-wire system |
| CN103303281B (en) * | 2012-03-14 | 2016-02-17 | 浙江万向精工有限公司 | Integrated line control brake system |
| CN104309594A (en) * | 2014-09-28 | 2015-01-28 | 浙江万向精工有限公司 | Auxiliary hydraulic brake regulating unit system |
| CN104309594B (en) * | 2014-09-28 | 2017-07-21 | 浙江万向精工有限公司 | Auxiliary hydraulic pressure brakes adjustment unit system |
| CN105270375A (en) * | 2015-10-27 | 2016-01-27 | 浙江万向精工有限公司 | Brake-by-wire and pedal-force feedback system and braking method |
| CN105270375B (en) * | 2015-10-27 | 2018-02-13 | 浙江万向精工有限公司 | Brake-by-wire and pedal force feedback system and braking method |
| CN106427964A (en) * | 2016-02-05 | 2017-02-22 | 芜湖伯特利汽车安全系统股份有限公司 | Control-by-wire hydraulic braking system and control method thereof |
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Granted publication date: 20121031 Termination date: 20190314 |