CN103303286A - Automobile brake device - Google Patents
Automobile brake device Download PDFInfo
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- CN103303286A CN103303286A CN2012100665449A CN201210066544A CN103303286A CN 103303286 A CN103303286 A CN 103303286A CN 2012100665449 A CN2012100665449 A CN 2012100665449A CN 201210066544 A CN201210066544 A CN 201210066544A CN 103303286 A CN103303286 A CN 103303286A
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- 239000012530 fluid Substances 0.000 claims abstract description 151
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 230000006978 adaptation Effects 0.000 claims description 95
- 238000001802 infusion Methods 0.000 claims description 78
- 238000009825 accumulation Methods 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 6
- 230000003042 antagnostic effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 28
- 230000000694 effects Effects 0.000 description 14
- 238000004146 energy storage Methods 0.000 description 7
- 230000002401 inhibitory effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention discloses an automobile brake device, and provides a brake device which can realize brake-by-wire, can also realize conventional hydraulic brake when the brake-by-wire fails and simultaneously has the characteristics of short brake distance and small occupied space. The automobile brake device comprises a brake fluid tank, a brake main cylinder, a brake pedal and a displacement sensor, wherein two sides of a piston of the brake main cylinder are provided with a working cavity and a fluid complementing cavity, and the working cavity is internally provided with a first reset spring; the sectional area A of the piston, which is in contact with the working cavity, on the brake main cylinder is less than the sectional area B of the piston which is in contact with the fluid complementing cavity; the brake pedal is provided with a pedal connecting rod which is opposite to a piston rod of the brake main cylinder, and a gap is arranged between the end part of the pedal connecting rod and the end surface of the piston rod which is opposite to the pedal connecting rod, or the end part of the pedal connecting rod is leaned against the end surface of the piston rod which is opposite to the pedal connecting rod in a separating way.
Description
Technical field
The present invention relates to a kind of brake device for car, be specifically related to a kind of brake device for car that is jointly consisted of by 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, namely connect with electric wire, the electric wire transferring energy, the data line transmission of signal comes the direct controlled wheel drg to realize braking.This pure line control brake system is partly separated the brake operatings such as the brake operations such as pedal parts and car side brake, and what produce in braking procedure makes us unjoyful vibration and can not be delivered on the brake pedal; But the weak point that it has, in case namely 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 again the deceleration of electrons advantage; But because two cover brake system exist simultaneously, complex structure, high expensive have also increased the care and maintenance difficulty.On the other hand, in the brake system of this class with hydraulic braking and deceleration of electrons combination, in order to reach the effect of an emergent hydraulic braking, usually also an energy storage equipment can be set separately; But it takes up room greatly, has further taken automobile originally with regard to limited space.
Further, for example, China Patent Publication No. 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 realized that On-line Control is moving and breaks down, can also realize braking by conventional hydraulic brake system.But because the restriction of conventional hydraulic brake system and brake master cylinder structure thereof; When breaking down in order to realize that On-line Control is moving, can also realize conventional hydraulic braking; 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 by stroke sensor; And pass to electronic control package and be used for the control hydraulic control device and realize brake-by-wire.This class brake system has following deficiency: one, can realize conventional hydraulic braking for On-line Control is moving when breaking down, this scheme will directly link together by connecting rod between brake pedal and master brake cylinder or the servo-unit, thereby realizes braking on master brake cylinder or the servo-unit so that the treadle effort of chaufeur can be delivered to by connecting rod; But so just cannot avoid so that produce in the braking procedure make us unjoyful vibration and can be delivered on the brake pedal, this problem also be the conventional hydraulic brake system of existing this class when brake-by-wire is combined, the problem that never is resolved.Because in the moving system of the compacting of routine, for the strength of one's legs failure-free is delivered on master brake cylinder or the servo-unit, then needs and directly to link together by connecting rod or other structures between brake pedal and master brake cylinder or the servo-unit.They are two years old, in order in conventional hydraulic brake system, to realize brake-by-wire, common design is identical with this programme, has namely increased a hydraulic circuit that is communicated with the brake-by-wire of car side brake by brake-fluid tank at conventional hydraulic braking path, and pump is arranged on the hydraulic circuit of setting up; But owing to having set up the hydraulic circuit of a brake-by-wire, so that the pipeline of hydraulic brake circuit increases, this not only can increase cost, increase maintenance difficulties; The more important thing is owing to pipeline growth meeting so that braking retardation increases stopping distance, reduces safety.
Summary of the invention
The first purpose of the present invention is in order to overcome the conventional hydraulic brake system of this class when brake-by-wire is combined, 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 by connecting rod or other structures, so that produce in the braking procedure make us unjoyful vibration and can be delivered to problem on the brake pedal, provide a kind of and not only can realize brake-by-wire, On-line Control is moved 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 brake device for car on the brake pedal.
The second purpose of the present invention is in order to overcome this class the brake-by-wire structure to be set up in conventional hydraulic brake system, owing to having increased the hydraulic circuit of brake-by-wire, so that the pipeline of hydraulic brake circuit increases, 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, can also realize conventional hydraulic braking, and the brake device for car that productive costs is low, stopping distance is little, safe.
The 3rd purpose of the present invention is in order to overcome this class with hydraulic braking and deceleration of electrons combination, the energy storage equipment that arranges 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 the space that brake system takies, reduce cost; And On-line Control is moved when breaking down, and can also realize the brake device for car of conventional hydraulic braking.
Technical scheme of the present invention is:
A kind of brake device for car comprises: brake-fluid tank, and it is used for storing braking liquid; Master brake cylinder, its piston both sides are provided with epitrochoidal chamber and fluid infusion chamber, are provided with the first retracing spring in the epitrochoidal chamber; The long-pending A of the piston cross-section that contacts with epitrochoidal chamber on the master brake cylinder is less than the long-pending B of the piston cross-section that contacts with the fluid infusion chamber; Brake pedal which is provided with the pedal rod relative with the piston rod of described master brake cylinder, is provided with gap or separable being resisted against on the piston rod end face between the end of described pedal rod and the piston rod end face; Hydraulic control device, the first braking path that it has pump and is communicated with described epitrochoidal chamber and car side brake, the braking liquid that described pump is used in the suction brake pipe flows to described epitrochoidal chamber and fluid infusion chamber; Displacement pickup, it is for detection of the stroke of brake pedal; Electronic control unit, it is based on the displacement signal of described displacement pickup and control described hydraulic control device.This programme detects the action of brake pedal and passes the signal along to electronic control unit by displacement pickup, and electronic control unit control driven by motor pump is set up the brake-pressure that adapts to, thereby realizes brake-by-wire.In the process that On-line Control is moved, because the braking liquid that pump is used in the suction brake pipe flows to described epitrochoidal chamber and fluid infusion chamber, therefore epitrochoidal chamber is identical with the pressure in fluid infusion chamber, and the long-pending A of the piston cross-section that contacts with epitrochoidal chamber is less than the long-pending B of the piston cross-section that contacts with the fluid infusion chamber; This is just so that in the process that On-line Control is moved, epitrochoidal chamber will be less than the pressure of fluid infusion chamber to the piston of master brake cylinder to the pressure of the piston of master brake cylinder, thereby the piston of master brake cylinder is initiatively moved, so that the piston rod of master brake cylinder and the spacing between the pedal rod become large gradually toward epitrochoidal chamber; Therefore the brake operating parts such as brake pedal and car side brake will can not contact in the moving process of On-line Control, and On-line Control is moved the unjoyful vibration of making us of producing in the process with regard to can not being delivered on the brake pedal like this.On-line Control is moved when breaking down, owing to not having the effect epitrochoidal chamber of pump and the braking in fluid infusion chamber to press very little close to zero; This moment, the piston of master brake cylinder can reset under the effect of retracing spring, so that the piston rod of master brake cylinder and the location restore between the pedal rod are to initial condition, chaufeur can be delivered to treadle effort on the car side brake by master brake cylinder by brake pedal, realizes conventional hydraulic braking.On the other hand, the brake system of this programme is controlled by an electronic control unit pump provides pressure source to directly act on master brake cylinder, with traditional master brake cylinder and the pressure regulating unit Integration Design that is formed by motor and pump, improved the system modular degree, reduce 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, and the piston side relative with epitrochoidal chamber is provided with a guide rod coaxial with piston rod, and guide rod runs through between the cylinder body of master brake cylinder and guide rod and the cylinder body and is provided with seal ring; Described guide rod cross-sectional area is greater than the piston rod cross-sectional area.Because piston one side 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; So that the long-pending A of the piston cross-section that contacts with epitrochoidal chamber will be less than the long-pending B of the piston cross-section that contacts with the fluid infusion chamber; The brake operating parts such as brake pedal and car side brake will can not contact in the moving process of On-line Control, so the making us unjoyful vibration and can not be delivered on the brake pedal of braking procedure generation.This scheme structure not only can realize in the pure line control brake system brake operatings such as the brake operations such as brake pedal part and car side brake partly being separated, and can also realize that conventional hydraulic braking directly links together the brake operatings such as brake pedal and car side brake part.
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 gradually by open end, 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 described epitrochoidal chamber is located between piston and the stepped hole bottom surface, and described fluid infusion chamber is located between piston and the end cover; Described end cover is provided with the first fluid infusion hole that is communicated with the fluid infusion chamber with master cylinder body between the adjacent step, and the cylinder body of the master brake cylinder between described stepped hole bottom surface and the adjacent step is provided with the first inlet opening and the first fluid hole that is communicated with epitrochoidal chamber.Because the first inlet opening and the 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 is clogging with the first inlet opening and the first fluid hole.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 like this piston of master brake cylinder under action of reset spring, to reset, can reduce the requirement of making precision.
As preferably, the piston rod end face is provided with hemispheric groove, and the end of pedal rod is provided with spherical projection, and described projection is positioned at groove.In the moving situation about breaking down of On-line Control, trample in the process of brake pedal can guaranteeing chaufeur by this programme structure, pedal rod can keep good contacting with the piston rod of master brake cylinder, and treadle effort is delivered on the car side brake by epitrochoidal chamber, realizes conventional hydraulic braking.
As preferably, be provided with the 3rd braking path between brake-fluid tank and the master brake cylinder, the 3rd braking path comprises the 3rd overall channel that is communicated with brake-fluid tank and the 3rd bypass passage that is connected respectively at epitrochoidal chamber and fluid infusion chamber, described pump is located on the 3rd overall channel, and being provided with braking liquid with the 3rd bypass passage that is connected with epitrochoidal chamber on described the 3rd overall channel can be by brake-fluid tank to epitrochoidal chamber mobile the second check valve and the 3rd check valve.Pump is located between brake-fluid tank and the master brake cylinder, and pump connects respectively epitrochoidal chamber and the fluid infusion chamber of master brake cylinder by 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.Importantly, because pump is located between brake-fluid tank and the master brake cylinder, so just do not need to increase the hydraulic circuit of brake-by-wire, can greatly shorten the length of pipe of the hydraulic circuit of brake-by-wire, reduce stopping distance, improve the brake safe performance.On the other hand, the 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 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.In the moving situation about breaking down of On-line Control, the 3rd electromagnetic switch valve by open type, the fluid infusion chamber can be communicated with by the 4th braking path with brake-fluid tank, so that the treadle effort of chaufeur can better be delivered on the car side brake by epitrochoidal chamber, realize conventional hydraulic braking.
As preferably, one the 6th braking path, it connects brake-fluid tank and fluid infusion chamber, and described the 6th braking path is provided with a braking liquid can be by brake-fluid tank first check valve mobile to the fluid infusion chamber.In electronic control unit normal operation, and motor or pump can cooperate by the 6th braking path and the first check valve and realize conventional hydraulic braking when fault occurring.
As preferably, brake pedal is provided with tramples simulator, and it is used for applying antagonistic force corresponding to the brake pedal shift motion to described brake pedal.Owing to being provided with and trampling simulator, can provide a kind of being similar to trample really effect in the moving process of On-line Control.
As preferably, epitrochoidal chamber is provided with pressure sensor; The first braking path is provided with the 4th electromagnetic switch valve for control the first braking path break-make; One end of described 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.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, by electronic control unit the 3rd electromagnetic switch valve and the 4th electromagnetic switch valve are closed, then by pump epitrochoidal chamber and fluid infusion chamber are pressurizeed, and then carry out accumulation of energy.Thereby can realize energy storage equipment and master brake cylinder be combined as a whole by this programme structure reduces the space that brake system takies.
As preferably, the 4th electromagnetic switch valve is normally closed open form electromagnetic switch valve; One self adaptation on-off system is connected on the first braking path with connection mode in parallel with the 4th electromagnetic switch valve by the 7th braking path; Described 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, stepped cavity middle part and an end are provided with the first self adaptation piston and the second self adaptation piston, and the sectional area of the first self adaptation piston greater than with the sectional area of the second self adaptation piston; Be connected by a pipe link between the first self adaptation piston and the second self adaptation piston; Interior the closing between the stepped cavity end relative with it at the first self adaptation piston of described stepped cavity is provided with the 3rd retracing spring; Described self adaptation cylinder body middle part is provided with the second inlet opening between the first self adaptation piston and the second self adaptation piston, self adaptation cylinder body one side that is positioned at same end with the second self adaptation piston is provided with the second fluid hole; Axial spacing between the second inlet opening and the second fluid hole is less than the spacing between the first self adaptation piston and the second self adaptation piston; The 7th braking path comprises path and underpass, and upper path connects the first braking path and the second inlet opening, and underpass connects the 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 pressure oil in accumulation of energy chamber can be applied to by the first braking path and produce the mistake braking on the car side brake.Although be normally closed open form electromagnetic switch valve with the 4th electromagnetic switch valve, in the time of can realizing that On-line Control is moving and break down by arranging of this programme, can also realize conventional hydraulic braking.Because the setting of self adaptation on-off system when line control brake system works, 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 certainly open the 7th braking path, to realize conventional hydraulic braking.
The invention has the beneficial effects as follows:
1. 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.
2. the pressure source that motor and pump is provided directly acts on master brake cylinder, realizes traditional master brake cylinder and pressure regulating unit Integration Design, has improved the system modular degree.
3. remove the vacuum booster in the conventional hydraulic, reduced cost, reduced installing space.
4. 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.
5. can realize energy storage equipment and master brake cylinder are combined as a whole, thereby reduce the space that brake system takies, 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 schematic diagram of the embodiment of the invention 1.
Fig. 2 is a kind of structural representation of the master brake cylinder in the embodiment of the invention 1.
Fig. 3 is a kind of principle of work schematic diagram of the embodiment of the invention 2.
Fig. 4 is a kind of principle of work schematic diagram of the embodiment of the invention 3.
Fig. 5 is a kind of structural representation of the master brake cylinder in the embodiment of the invention 3.
Fig. 6 is a kind of structural representation of self adaptation on-off system conducting state of the embodiment of the invention 3.
Fig. 7 is a kind of structural representation of self adaptation on-off system closed condition of the embodiment of the invention 3.
Fig. 8 is a kind of principle of work schematic diagram of the embodiment of the invention 4.
Fig. 9 is a kind of structural representation of the embodiment of the invention 5.
Among the figure: master brake cylinder 1, brake pedal 2, epitrochoidal chamber 3, fluid infusion chamber 4, the first retracing spring 5, guide rod 6, the first fluid infusion hole 7, pedal rod 8, displacement pickup 9, brake-fluid tank 10, pump 11, motor 12, the 3rd braking path 13, the 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, the second cavity 21, the first cavity 22, the second retracing spring 23, the first braking path 24, the second braking path 25, electronic control unit 26, the second electromagnetic switch valve 27, the first electromagnetic switch valve 28, car side brake 29, velometer 30, the first inlet opening 31, the first fluid hole 32, end cover 33, dust boot 34, groove 35, projection 36, the 6th braking path 37, the 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, the second inlet opening 47, the second fluid hole 48, self adaptation cylinder body 49, water conservancy diversion through hole 50, energy-storaging spring 51, the first self adaptation piston 52, the second self adaptation piston 53, inhibiting device 54, stepped hole 55.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment the present invention is described in further detail:
Embodiment 1: as shown in Figure 1, a kind of brake device for car comprises the velometer 30 that hydraulic control device, electronic control unit 26, brake-fluid tank 10, motor 12, pump 11, master brake cylinder 1, brake pedal 2, car side brake 29 reach for detection of vehicle wheel rotational speed.Hydraulic control device comprises the braking path of connecting components in motor, pump and the brake device for car.
The piston both sides of master brake cylinder 1 are provided with epitrochoidal chamber 3 and fluid infusion chamber 4.One first braking path 24 connects master brake cylinder 1 and car side brake 29.The first braking path 24 comprises the first overall channel that is connected with epitrochoidal chamber 3 and the first bypass passage that is connected with each car side brake 29 respectively; Be respectively equipped with one first electromagnetic switch valve 28 on each first bypass passage, and the first electromagnetic switch valve is the open type electromagnetic switch valve.
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.The second braking path 25 comprises the second overall channel that is connected with brake-fluid tank 10 and the second bypass passage that is connected with each car side brake 29 respectively; Be respectively equipped with one second electromagnetic switch valve 27 on each second bypass passage, and the second electromagnetic switch valve is the closed type electromagnetic switch valve.
One the 3rd braking path 13 connects brake-fluid tank 10 and master brake cylinder.The 3rd braking path 13 comprises the 3rd overall channel that is communicated with brake-fluid tank 10 and the 3rd bypass passage that is connected respectively at epitrochoidal chamber 3 and fluid infusion chamber 4.Described pump 11 is located on the 3rd overall channel.Being provided with braking liquid with the 3rd bypass passage that is connected with epitrochoidal chamber on described the 3rd overall channel can be by brake-fluid tank to epitrochoidal chamber mobile the second check valve 14 and the 3rd check valve 15.The braking liquid that pump is used in the suction brake pipe flows to described epitrochoidal chamber 3 and fluid infusion chamber 4.Because pump 22 is located between brake-fluid tank and the master brake cylinder, so just do not need to increase the hydraulic circuit of brake-by-wire, can greatly shorten the length of pipe 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 pressure regulating unit Integration Design that is comprised of motor and pump, has improved the system modular degree; Can reduce cost, 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.In the moving situation about breaking down of On-line Control, the 3rd electromagnetic switch valve by open type, the fluid infusion chamber can be communicated with by the 4th braking path with brake-fluid tank, so that the treadle effort of chaufeur can better be delivered on the car side brake by epitrochoidal chamber, realize conventional hydraulic braking.
The piston both sides of master brake cylinder 1 are provided with epitrochoidal chamber 3 and fluid infusion chamber 4.Be provided with the first retracing spring 5 in the epitrochoidal chamber, also have the pressure sensor 18 for detection of epitrochoidal chamber pressure on the epitrochoidal chamber.The long-pending A of the piston cross-section of epitrochoidal chamber 3 contacts is less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber 4 on the master brake cylinder 1.Described brake pedal 2 is provided with the pedal rod 8 relative with the piston rod of master brake cylinder 1, is provided with the gap between the piston rod end face of the end of described pedal rod 8 and master brake cylinder 1.The end of above-mentioned pedal rod 8 is also can be directly separable to be resisted against on the piston rod end face with master brake cylinder 1.Specifically, the piston rod end face of master brake cylinder 1 is provided with hemispheric groove 35, and the end of pedal rod 8 is provided with spherical projection 36, and described projection is positioned at groove.
Pedal rod 8 is hinged on the brake pedal 2.Pedal rod 8 is provided with an inhibiting device 54.Inhibiting device 54 can be to be provided with the gap between the pilot hole of the horizontally-guided cover that arranges along pedal rod 8 of the horizontal guide slot that arranges along pedal rod 8 of a horizontal supporting plate or that is arranged on pedal rod 8 belows or one and orienting sleeve and the pedal rod 8.The purpose that inhibiting device 54 arranges is: when pedal rod 8 with after the piston rod of master brake cylinder 1 separates, produce rotation under the effect that pedal rod 8 can not conducted oneself with dignity again; When chaufeur releasing brake pedal, after brake pedal resetted, pedal rod 8 can reset to initial horizontality under the effect of inhibiting device, the position relationship between the piston rod end face of maintenance pedal rod 8 and master brake cylinder 1.
In the process that On-line Control is moved, because pump is communicated with epitrochoidal chamber and fluid infusion chamber, therefore epitrochoidal chamber is identical with the pressure in fluid infusion chamber in the pump work process, amasss less than the piston cross-section that contacts with the fluid infusion chamber and the piston cross-section that contacts with epitrochoidal chamber is long-pending; This is just so that in the process that On-line Control is moved, epitrochoidal chamber will be less than the pressure of fluid infusion chamber to the piston of master brake cylinder to the pressure of the piston of master brake cylinder, thereby the piston of master brake cylinder is initiatively moved, so that the piston rod of master brake cylinder and the spacing between the pedal rod become large gradually toward epitrochoidal chamber; Therefore the brake operating parts such as brake pedal and car side brake will can not contact in the moving process of On-line Control, and On-line Control is moved the unjoyful vibration of making us of producing in the process with regard to can not being delivered on the brake pedal like this.And when pump quit work, the piston of master brake cylinder can reset under the effect of retracing spring, so that the piston rod of master brake cylinder and the location restore between the pedal rod are to initial condition.
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 gradually by open end.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.Described epitrochoidal chamber 3 is located between piston and the stepped hole bottom surface, and described 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, and the piston side relative with epitrochoidal chamber 3 is provided with a guide rod 6 coaxial with piston rod.Guide rod 6 runs through between the cylinder body of master brake cylinder and guide rod and the cylinder body and is provided with seal ring.Guide rod 6 cross-sectional areas are greater than the piston rod cross-sectional area of master brake cylinder, so that 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.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 the first inlet opening 31 and the 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 the first fluid hole 32.Above-mentioned the 3rd braking path 13 connects respectively the first fluid infusion hole 7 and the first inlet opening 31 by brake-fluid tank 10.
Brake pedal 2 is provided with tramples simulator 19, and it is for the antagonistic force that applies to described brake pedal corresponding to the brake pedal shift motion.Brake pedal 2 is provided with displacement pickup 9, and it is for detection of the stroke of brake pedal 2.Electronic control unit 26 is based on the displacement signal of described displacement pickup and control described hydraulic control device.
The wheel speed signal of the pressure signal of the displacement signal of displacement pickup 9, pressure sensor 18, velometer 30 is transferred to electronic control unit 26 by data line respectively and connects; Electronic control unit is processed 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 displacement pickup 9, illustrate that namely 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 simultaneously motor 12 work, the driven by motor pump is set up the brake-pressure that adapts in epitrochoidal chamber 3 and the fluid infusion chamber 4 of master brake cylinder 1, is delivered to by the first braking path 24 and realizes braking on the car side brake 29.Pressure sensor 18 meeting real-time perception brake-pressure sizes in braking procedure in the epitrochoidal chamber 3 of master brake cylinder 1 are if reach then motor stop motion of preset value.Simultaneously, as shown in Figure 1, in the moving process of On-line Control, utilize under epitrochoidal chamber and the uniform pressure effect of fluid infusion chamber, piston by master brake cylinder is different from the active area in epitrochoidal chamber and fluid infusion chamber, thereby produce the poor piston rod that makes master brake cylinder of propulsive effort to left movement, the piston rod connecting rod of master brake cylinder is separated with pedal rod.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 control this moment motor 12 quits work, open simultaneously the second braking on the path 25 the second electromagnetic switch valve 27 and the 3rd electromagnetic switch valve 17 on the 4th braking path 16, 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 the first retracing spring 5.
When the chaufeur emergency braking, electronic control unit 26 is set up the brake-pressure that adapt to by the driven by motor pump in epitrochoidal chamber 3 and the fluid infusion chamber 4 of master brake cylinder 1 in conjunction with the wheel speed signal of velometer 30 detections and the displacement signal of displacement pickup 9; If velometer 30 detects certain wheel lockup in this process, because the braking path of each car side brake is separate, therefore can open the second electromagnetic switch valve 27 on the second bypass passage of corresponding the second braking path 25, lower the drg brake-pressure, solve the situation of wheel lockup, take full advantage 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 the 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 the first electromagnetic switch valve 28 on the first braking path 24 is the open type electromagnetic switch valve, and the 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 by 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 the 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, 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 first check valve 38 mobile to the fluid infusion chamber.All the other structures of the present embodiment are with reference to embodiment 1.
When the moving system of On-line Control is out of order, specifically refer in electronic control unit 26 normal operations, and motor 12 or pump 11 then can cooperate the conventional hydraulic braking of realization by the 6th braking path 37 and the first check valve 38 when breaking down; Can not affect brake-by-wire when the moving system works of On-line Control is normal simultaneously.Because the circulating direction of the 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 affect 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 displacement pickup 9, the 3rd electromagnetic switch valve 17 on the 4th braking path 16 can be closed; If can not get replenishing without the braking liquid in 37 fluid infusion chambeies of the 6th braking path 4, therefore the strength of one's legs of chaufeur can't be delivered on the car side brake 29.
Embodiment 3: such as Fig. 4, shown in Figure 5, the first braking path 24 is provided with the 4th electromagnetic switch valve 41 for control the first braking path 24 break-makes.That the 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 arranges on the 4th braking path 16 is the open type 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 first check valve 38 mobile to the fluid infusion chamber.One 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 by some water conservancy diversion through holes 50 between accumulation of energy chamber 39 and the epitrochoidal chamber 3.Be arranged on that guide rod on the piston of master brake cylinder passes epitrochoidal chamber 3 and accumulation of energy chamber 39 is positioned at the master brake cylinder outside, be provided with seal ring between the cylinder body of guide rod and master brake cylinder.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.
The 4th electromagnetic switch valve 41 is 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.If because the 4th electromagnetic switch valve 41 is made as often open form electromagnetic switch valve, be under the energy accumulating state in accumulation of energy chamber 39, the deceleration of electrons unit occurs and be out of order when not working, accumulation of energy pressure can be sent to the mistake braking that produces on the car side brake.
Be the open type electromagnetic switch valve with the 3rd electromagnetic switch valve 17 that arranges on the 4th braking path 16, 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; To be under the energy accumulating state in accumulation of energy chamber 39 in order to realize, 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 by 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 by 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, eliminate the accumulation of energy pressure so that self adaptation on-off system 42 is in conducting state, with conducting the 7th braking path 43.
Because pump 11 is located between brake-fluid tank 10 and the master brake cylinder 1 and was communicated with epitrochoidal chamber 3 and fluid infusion chamber 4; Therefore the end at master brake cylinder 1 arranges 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 space that brake system takies.
As shown in Figure 4, a self adaptation on-off system 42 is connected on the first overall channel of the first braking path 24 with connection mode in parallel with the 4th electromagnetic switch valve 41 by 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.Stepped cavity middle part and an end are provided with the first self adaptation piston 52 and the second self adaptation piston 53, and the sectional area of the first self adaptation piston greater than with the sectional area of the second self adaptation piston.Be connected by a pipe link 45 between the first self adaptation piston and the second self adaptation piston.Between the first self adaptation piston 52 and the stepped cavity end relative with it, be provided with the 3rd retracing spring 46 in the described stepped cavity 44.Described self adaptation cylinder body middle part is provided with the second inlet opening 47 between the first self adaptation piston and the second self adaptation piston; Self adaptation cylinder body one side that is positioned at same end with the second self adaptation piston is provided with the second fluid hole 48.Axial spacing between the second inlet opening 47 and the second fluid hole 48 is less than the spacing between the first self adaptation piston and the second self adaptation piston.The 7th braking path 43 comprises path and underpass, and upper path connects the first overall channel and second inlet opening 47 of the first braking path 24, and underpass connects the first overall channel of the second fluid hole 48 and the first braking path 24.All the other structures of the present embodiment are with reference to embodiment 1.
The moving system of above-mentioned self adaptation on-off system 42 On-line Control has two states when working: one, under 30% the state of accumulation of energy chamber 39 interior accumulation of energy pressure less than or equal to the capping value, self adaptation on-off system 42 will be in conducting state, namely the second inlet opening 47 and the second fluid hole 48 are all between the first self adaptation piston 52 and the second self adaptation piston 53, as shown in Figure 6.Because under this state, the braking liquid in the self adaptation cylinder body 49 to the thrust to the right of the second self adaptation piston and the 3rd retracing spring reset force sum to the right greater than the interior braking liquid of self adaptation cylinder body 49 to the first self adaptation piston thrust left.
They are two years old, under 30% the state of accumulation of energy chamber 39 interior accumulation of energy pressure greater than the capping value, self adaptation on-off system 42 will be in closed condition, namely the second inlet opening 47 is between the first self adaptation piston 52 and the second self adaptation piston 53, and the second fluid hole 48 is positioned at the first self adaptation piston 52 and the second self adaptation piston 53 outsides, as shown in Figure 7.Because under this state, the braking liquid in the self adaptation cylinder body 49 to the thrust to the right of the second self adaptation piston and the 3rd retracing spring reset force sum to the right less than the interior braking liquid of self adaptation cylinder body 49 to the first self adaptation piston thrust left.
The moving system of above-mentioned self adaptation on-off system 42 On-line Control breaks down and only has a kind of state when not working: self adaptation on-off system 42 will be in conducting state, namely the second inlet opening 47 and the second fluid hole 48 are all between the first self adaptation piston 52 and the second self adaptation piston 53, as shown in Figure 6.Because when providing brake-pressure by the treadle effort of chaufeur, the braking liquid in the self adaptation cylinder body 49 to the thrust to the right of the second self adaptation piston and the 3rd retracing spring reset force sum to the right greater than the interior braking liquid of self adaptation cylinder body 49 to the first self adaptation piston thrust left.
The setting of self adaptation on-off system 42, 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 by self adaptation on-off system 42, to realize conventional hydraulic braking.
As shown in Figure 4, the detailed process of accumulation of energy is as follows, do not detect at electronic control unit 26 before the displacement signal of displacement pickup 9, namely chaufeur is in the situation that less than brake, electronic control unit 26 can control the 3rd electromagnetic switch valves 17 and the first electromagnetic switch valve 28 is closed.Then open motor 12 and by 11 pairs of epitrochoidal chambers 3 of pump and the pressurization of fluid infusion chamber, with this accumulation of energy in the accumulation of energy chamber, until pressure sensor 18 detects the pressure of epitrochoidal chamber 3 reach setting value after, disable motor stops accumulation of energy.
The course of action of self adaptation on-off system 42 is as follows in the process of this accumulation of energy: when the pressure in the accumulation of energy chamber at 30% when following of capping value, adapt to cylinder body 49 interior brake fluid pressures are not enough to customer service the 3rd retracing spring to the thrust of its piston reset force, self adaptation on-off system 42 is in conducting state as shown in Figure 6.When the pressure in the accumulation of energy chamber at 30% when above of capping value, adapt to brake fluid pressure in the cylinder body 49 greater than the reset force of the 3rd retracing spring, self adaptation on-off system 42 is in closed condition as shown in Figure 7, cuts off the 7th braking path 43 with this.
In 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, so that the braking liquid in the fluid infusion chamber is back in the brake-fluid tank 10 by 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, the braking liquid in accumulation of energy chamber 39 and the epitrochoidal chamber 3 also can be back to by the 4th braking path 16 by the first fluid infusion hole 7 and eliminate the accumulation of energy pressure in the brake-fluid tank simultaneously; So that the state that self adaptation on-off system 42 is in is as shown in Figure 6 braked path 43 with conducting the 7th.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 by 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 displacement pickup 9, illustrate that namely chaufeur tramples brake pedal 2; This moment, electronic control unit was controlled the normally open that the first electromagnetic switch valve 28 was opened and recovered to the 4th electromagnetic switch valve 41, made simultaneously machine operation, and then realized brake-by-wire.
Trample stroke when larger when what electronic control unit 26 detected brake pedal 2, the braking that the electronic control unit control pump produces is pressed also larger accordingly.Because the 5th braking path, it connects respectively the first cavity 22 and the second cavity 21 by epitrochoidal chamber 3, and the piston cross-section of the first cavity contact is long-pending long-pending greater than the piston cross-section that contacts with the second cavity; So that when brake pedal trample stroke when larger, the resistance that is subject to trampling simulator is also larger, therefore further improves the authenticity of trampling effect.
Embodiment 5, and as shown in Figure 9, brake pedal 2 is provided with the pedal rod 8 relative with the piston rod of master brake cylinder 1, and pedal rod 8 is hinged on the brake pedal 2.The piston rod outer face of master brake cylinder 1 is provided with a stepped hole 55; The sectional area of stepped hole is reduced and the stepped hole bottom surface is the groove 35 that is semi-spherical shape toward interior gradually by open end.The internal diameter in less hole is also greater than the diameter of pedal rod 8 in the described stepped hole 55.The end of pedal rod 8 is provided with spherical projection 36, and pedal rod 8 is arranged in the stepped hole 55, and described projection is positioned at groove.Pedal rod 8 in the present embodiment is compared with embodiment 1 with the connection structure of the piston rod of master brake cylinder 1 and has been removed inhibiting device, makes structure simpler.All the other structures of the present embodiment are with reference to embodiment 1.
Claims (10)
1. a brake device for car is characterized in that, comprising:
Brake-fluid tank (10), it is used for storing braking liquid;
Master brake cylinder (1), its piston both sides are provided with epitrochoidal chamber (3) and fluid infusion chamber (4), are provided with the first retracing spring (6) in the epitrochoidal chamber; The long-pending A of the upper piston cross-section that contacts with epitrochoidal chamber (3) of master brake cylinder (1) is less than the long-pending B of the piston cross-section that contacts with fluid infusion chamber (4);
Brake pedal (2) which is provided with the pedal rod (8) relative with the piston rod of described master brake cylinder, is provided with gap or separable being resisted against on the piston rod end face between the end of described pedal rod (8) and the piston rod end face;
Hydraulic control device, it has pump (11) and is communicated with described epitrochoidal chamber (3) brakes path (24) with first of car side brake (29), and the braking liquid that described pump is used in the suction brake pipe flows to described epitrochoidal chamber (3) and fluid infusion chamber (4);
Displacement pickup (9), it is for detection of the stroke of brake pedal (2);
Electronic control unit (26), it is based on the displacement signal of described displacement pickup and control described hydraulic control device.
2. a kind of brake device for car 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 the cylinder body of master brake cylinder and guide rod and the cylinder body and is provided with seal ring; Described guide rod (6) cross-sectional area is greater than the piston rod cross-sectional area.
3. a kind of brake device for car according to claim 2, 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 gradually by open end, 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 described epitrochoidal chamber (3) is located between piston and the stepped hole bottom surface, and described fluid infusion chamber (4) is located between piston and the end cover; Described 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 the cylinder body of the master brake cylinder between described stepped hole bottom surface and the adjacent step is provided with the first inlet opening (31) and the first fluid hole (32) that is communicated with epitrochoidal chamber (3).
4. a kind of brake device for car according to claim 1 is characterized in that, the piston rod end face is provided with hemispheric groove (35), and the end of pedal rod is provided with spherical projection (36), and described projection is positioned at groove.
5. a kind of brake device for car according to claim 1, it is characterized in that, be provided with the 3rd braking path (13) between described brake-fluid tank (10) and the master brake cylinder (1), the 3rd braking path comprises the 3rd overall channel that is communicated with brake-fluid tank and the 3rd bypass passage that is connected respectively at epitrochoidal chamber (3) and fluid infusion chamber (4), described pump (11) is located on the 3rd overall channel, and being provided with braking liquid with the 3rd bypass passage that is connected with epitrochoidal chamber on described the 3rd overall channel can be by brake-fluid tank to epitrochoidal chamber mobile the second check valve (14) and the 3rd check valve (15).
6. a kind of brake device for car according to claim 1 is characterized in that, 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.
7. according to claim 1 and 2 or 3 or 4 or 5 or 6 described a kind of brake device for car, it is characterized in that, one the 6th braking path (37), it connects brake-fluid tank (10) and fluid infusion chamber (4), and described the 6th braking path is provided with a braking liquid can be by brake-fluid tank first check valve (38) mobile to the fluid infusion chamber.
8. according to claim 1 and 2 or 3 or 4 or 5 or 6 described a kind of brake device for car, it is characterized in that, described brake pedal (2) is provided with tramples simulator (19), and it is for the antagonistic force that applies to described brake pedal corresponding to the brake pedal shift motion.
9. according to claim 1 and 2 or 3 or 4 or 5 or 6 described a kind of brake device for car, it is characterized in that, described epitrochoidal chamber (3) is provided with pressure sensor (18); The first braking path (24) is provided with the 4th electromagnetic switch valve (41) for control the first braking path break-make; One end of described 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.
10. a kind of brake device for car according to claim 9 is characterized in that, described 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 connection mode in parallel with the 4th electromagnetic switch valve (41) by the 7th braking path (43); Described 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, stepped cavity middle part and an end are provided with the first self adaptation piston (52) and the second self adaptation piston (53), and the sectional area of the first self adaptation piston greater than with the sectional area of the second self adaptation piston; Be connected by a pipe link (45) between the first self adaptation piston and the second self adaptation piston; Be positioned in the described stepped cavity (44) between the first self adaptation piston (52) and the stepped cavity end relative with it and be provided with the 3rd retracing spring (46); Described self adaptation cylinder body middle part is provided with the second inlet opening (47) between the first self adaptation piston and the second self adaptation piston, self adaptation cylinder body one side that is positioned at same end with the second self adaptation piston is provided with the second fluid hole (48); Axial spacing between the second inlet opening (47) and the second fluid hole (48) is less than the spacing between the first self adaptation piston and the second self adaptation piston; The 7th braking path comprises path and underpass, and upper path connects the first braking path and the second inlet opening, and underpass connects the second fluid hole and the first braking path.
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| CN201210066544.9A CN103303286B (en) | 2012-03-14 | 2012-03-14 | A kind of brake device for car |
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| CN201210066544.9A CN103303286B (en) | 2012-03-14 | 2012-03-14 | A kind of brake device for car |
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| CN103303286B CN103303286B (en) | 2016-07-13 |
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| CN112566824A (en) * | 2020-05-13 | 2021-03-26 | 华为技术有限公司 | Hydraulic adjusting device, hydraulic adjusting system, braking system and control method |
| CN116552186A (en) * | 2022-01-28 | 2023-08-08 | 比亚迪股份有限公司 | Hydraulic suspension and vehicle |
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