CN1778609A - Electronically controlled pump for brake system - Google Patents
Electronically controlled pump for brake system Download PDFInfo
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- CN1778609A CN1778609A CN 200410095655 CN200410095655A CN1778609A CN 1778609 A CN1778609 A CN 1778609A CN 200410095655 CN200410095655 CN 200410095655 CN 200410095655 A CN200410095655 A CN 200410095655A CN 1778609 A CN1778609 A CN 1778609A
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Abstract
A pump of brake system controlled electronically is composed of a hole in the modulator block, a piston in said hole and connected to shaft of motor arranged at one end of said hole, a cover for another end of said hole to form a compression cavity, an outlet valve able to be opened or closed, an inlet channel in said cover, and an inlet valve for said inlet channel.
Description
Technical field
The present invention relates to a kind of electronically controlled brake system, relate in particular to a kind of pump that is used for oil is drawn into forcibly from low pressure oil chamber (accumulator) the high pressure oil chamber.
Background technology
Generally speaking, electronically controlled brake system is used for preventing effectively in the process of brake operating, quick operated start or flat-out acceleration the generation of vehicle slip phenomenon.So electronically controlled brake system comprises: a plurality of electromagnetic valves, and these electromagnetic valves are used to control the braking oil pressure of the hydraulic brake that is transported to the vehicle wheel; A pair of low pressure oil chamber, these low pressure oil chambers temporarily store the brake noise of discharging from hydraulic brake; A pair of high pressure oil chamber; A pair of pump, each pump are arranged between low pressure oil chamber linking and the high pressure oil chamber that links, and respectively by direct motor drive; And the electronic control unit (ECU) of control electromagnetic valve and electrical motor.These element are received within the modulator block of aluminum.
Each pump will be drawn in the high pressure oil chamber that links forcibly with the brake noise that low-pressure state is stored in the low pressure oil chamber that links, and like this, brake noise can be sent to a hydraulic brake or the main clutch release slave cylinder that links.
With reference to Fig. 1, wherein show the pump of the brake system that is used for above-mentioned conditional electronic control.As shown in Figure 1, pump comprises a hole 4 that is formed in the modulator block 3, like this, hole 4 is along the lateral open of modulator block 3, thereby with an inlet 1 that is connected in low pressure oil chamber (not shown) be connected in of high pressure oil chamber (not shown) and export 2 and link to each other.Pump also comprises a piston 6, and an end of this piston links to each other with an eccentric main axis 5a of electrical motor 5, and is contained in the hole 4 by a termination in hole 4, like this piston 6 can be along the hole vertical rectilinearity ground crank motion of 4.
One lid 8 is engaged on the other end in hole 4, thereby has formed a compression chamber 7 between the other end of lid 8 and piston 6 in hole 4.Lid 8 is provided with one and is used to open outlet valve 8b with closed escape route 8a with the outlet 2 exit passageway 8a that are communicated with and one.
An access road 6a is formed on piston 6 and sentences the oil of reception from inlet 1, and the oil that will receive is discharged in the compression chamber 7.One access valve 9 is arranged on the end of outlet that piston 6 is formed with access road 6a.Access valve 9 is operated on the contrary with outlet valve 8b, thereby opens and closed access road 6a according to the crank motion of piston 6.
Access valve 9 comprises: a metal spherical component 9a, and this spherical component is arranged to the outlet closed contact with access road 6a; A spring 9b, this spring always promote the outlet of spherical component against access road 6a; And holding element 9c who admits spherical component 9a and spring 9b.Frusto-conical valve seat 6b is formed on the end with the outlet corresponding piston 6 of access road 6a.Spherical component 9a contacts with valve seat 6b or separates with valve seat 6b.One retracing spring 7a is arranged in the compression chamber 7, thereby always towards electrical motor 5 pushing piston 6, the piston 6 of having shifted to lid 8 is returned towards electrical motor 5.Holding element 9c is arranged on retracing spring 7a and piston 6 on the end of retracing spring 7a.
In having traditional pump of above-mentioned structure, when the eccentric main axis 5a of electrical motor 5 rotated, piston 6 was done straight reciprocating motion, and the interior pressure of the compression chamber 7 in the hole 4 is changed.Respond the variation of this pressure, access valve 9 and outlet valve 8b open and closed procedure in opposite mode respectively.Thus, oil is introduced in the compression chamber 7 by inlet 1, and discharges by outlet 2 from compression chamber 7 after compression.
That is to say, when piston 6 when lid 8 moves, the oil pressure of compression chamber 7 increases, and outlet valve 8b is opened.Oil in the compression chamber 7 is pumped into high pressure oil chamber (not shown) by the outlet 2 of opening thus.
On the other hand, when piston towards electrical motor 5 moved, the oil pressure of compression chamber 7 was reduced to a negative pressure, and access valve 9 is opened and outlet valve 8b closure like this.Thus, the oil in the low pressure oil chamber (not shown) by enter the mouth 1 and access road 6a be sucked into compression chamber 7, thereby fill compression chamber 7.
Yet, there is such problem in the said pump of in traditional electronically controlled brake system, using, promptly, the filling speed of the oil in the compression chamber 7 may be not enough, this is because access valve 9 is arranged on the place, end of the piston 6 of the outlet that forms access road 6a, with along with piston 6 crank motion together, spherical component 9a can not remove from valve seat 6b apace like this.
That is to say, when access valve 9 along with piston 6 during towards mobile the opening of electrical motor 5, the interior pressure of compression chamber reduces to negative pressure, like this, can oil be pumped in the compression chamber 7 from access road 6a.Meanwhile, the force of inertia that acts on towards electrical motor 5 is applied on the spherical component 9a, and this spherical component 9a is along with piston 6 moves together, and like this, spherical component 9a can not remove from valve seat 6b apace.
In addition, have a kind of structure of frustum of a cone owing to can be located in the valve seat 6b of the access valve 9 of spherical component 9a thereon selectively, thereby, the manufacturing of Rongcheng valve seat 6b easily.In addition, having ball-shaped spherical component 9a with the metal manufacturing also has problems.
That is to say, because spherical component 9a has a kind of globosity, contact oil, that is, the area of the spherical component 9a of contact liq is bigger relatively than planar structure.In addition, the liquid that acts on the spherical component 9a is mobile along the rounded outer surface of spherical component 9a in the mode of shunting by the guiding of the rounded outer surface of spherical component 9a, and is not concentrated on the spherical component 9a.Owing to this reason, spherical component 9a since liquid trend towards flowing and can not easily removing from valve seat 6b towards the outlet of access road 6a.In addition, in the process of access valve 9 opening operations, have residual magnetic force between valve seat 6b and the spherical component 9a, this is because spherical component 9a is made of metal with the piston 6 that is provided with valve seat 6b.The mobile difficulty more of 6b because residual magnetic force, spherical component 9a are lifted off a seat.Spherical component 9a lifts off a seat, and that access valve 9 is opened is insufficient for difficulty that 6b moves.Like this, the speed that oil is filled in the compression chamber 7 in the opening operation process of access valve 9 may be not enough, and like this, the oil extraction efficient of pump can descend.
Summary of the invention
The present invention is directed to the problems referred to above, one aspect of the present invention is to provide the pump of the electronically controlled brake system that a kind of access valve can steadily open, and the filling speed of oil will be enhanced in the compression chamber like this.
According to an aspect, the invention provides a kind of pump of electronically controlled brake system, this pump comprises: a modulator block; One is formed on the hole in the modulator block, and this hole is communicated with entrance and exit in being formed on modulator block; One piston, this piston links to each other with a main shaft of the electrical motor of an end that is arranged on described hole, and this piston is arranged in the described hole, thereby piston can be in described hole crank motion; One lid, this lid links to each other with the other end in described hole, thereby has formed a compression chamber at lid with between an end of the piston of lid; An and retracing spring, described retracing spring is arranged in the compression chamber, thereby always towards the electrical motor pushing piston, wherein, compression chamber is communicated with outlet, and wherein, pump also comprises: an outlet valve, this outlet valve is arranged on described exit, opening and closed outlet, thereby allows the oil in the compression chamber to discharge in compression chamber by outlet in the state that outlet is opened; One access road, this access road is formed in the lid, is transported to compression chamber with the oil in will entering the mouth; And an access valve, this access valve is arranged in the compression chamber in exit of access road, and is fixed on the lid, and to open and closed access road, access valve and outlet valve are operated on the contrary.
Access valve can comprise a ring-shaped valve seats, and this ring-shaped valve seats is arranged on the exit of access road; One disc shaped valve opened/closed member, this member are arranged to and can be moved between the second place that primary importance that described valve opened/closed member contacts with valve seat and this valve opened/closed member and valve seat separate; One elastic component, this elastic component are always towards valve seat pushing valve opened/closed member; And a holding element, this holding element is fixed on the lid, with receive valve opened/closed member and elastic component.
Lid can be provided with a toroidal extension, and extend on this toroidal extension surface from lid towards compression chamber between compression chamber and modulator block.Holding element can closely be engaged in the extendible portion.
Valve seat can be given prominence to from lid towards valve opened/closed member.Valve opened/closed member can have a plane surface that contacts with valve seat when valve opened/closed member moves on to primary importance.
Valve seat can be an integral body with lid.
Valve seat can be arranged on an independent seat member place that links to each other with lid.Valve seat can be made by plastic material.
Access valve can comprise a disc shaped valve opened/closed structure and one and the ring-shaped valve seats that becomes one of described valve opened/closed member.This ring-shaped valve seats can go out from a distal process of valve opened/closed member, and valve seat can move between the second place that primary importance that valve seat contacts with lid and valve seat and lid separate.
Valve opened/closed member can be made by plastic material.
Access road can comprise: an oil main line, and this oil main line is communicated with compression chamber; And a plurality of auxiliary oil channels, these auxiliary oil channels are communicated with inlet.
Outlet valve comprises a boiler check valve, and only when piston was shifted to lid, this boiler check valve was opened outlet.
Others of the present invention and/or an advantage part will illustrate in following specification sheets that a part can draw or understand by putting into practice the present invention apparently from specification sheets.
Description of drawings
In conjunction with the accompanying drawings, can be obviously and more easily understand above-mentioned and/or others and advantage of the present invention from the description of following embodiment, accompanying drawing is:
Fig. 1 is the cutaway view that shows the structure of the pump in the brake system that is used in conditional electronic control;
Fig. 2 is for using the hydraulic circuit block diagram of an Antilock brake system of the present invention;
Fig. 3 shows the cutaway view of the structure of the pump of electronically controlled brake system according to an embodiment of the invention;
Fig. 4 is the amplification view that shows the part of the pump among Fig. 3;
Fig. 5 shows the amplification view of the part of the pump of electronically controlled brake system according to another embodiment of the present invention; And
Fig. 6 shows the amplification view of the part of the pump of electronically controlled brake system according to another embodiment of the present invention.
The specific embodiment
Now specifically with reference to the embodiments of the invention shown in the accompanying drawing.Hereinafter with reference to accompanying drawing these embodiment are described, thus explanation the present invention.
With reference to Fig. 2, shown pump according to an embodiment of the invention is included in the electronically controlled brake system, and this brake system is applied to a kind of Antilock brake system that can prevent wheel slip in the brake operation course of electronically controlled brake system.
As shown in Figure 2, adopt the moving equipment of anti-locking of the present invention to comprise a servo unit 11 and a main clutch release slave cylinder 12, these parts operationally link to each other with a brake pedal 10, thereby produce a hydraulic brake pressure.Should also comprise by the moving equipment of anti-locking: a plurality of electromagnetic valves (in the example that illustrates, two groups of electromagnetic valve 14a and 14b), these electromagnetic valve controllable sub supplementary biographies are passed to the hydraulic brake pressure of the hydraulic brake 13 that is installed on front-wheel and the trailing wheel; Low pressure oil chamber 14, this low pressure oil chamber can temporarily be stored in the oil of discharging from hydraulic brake 13 in the decompression control of braking process; A pair of pump 15L and 15R, but the pumping in the brake operation course of a supercharging or pressure maintenance of these pumps is stored in the oil in the low pressure oil chamber 14; One electrical motor 16, this electrical motor 16 is driving pump 15L and 15R synchronously; And high pressure oil chamber 17, each high pressure oil chamber 17 comprises a hole 17a who is arranged on the exit of high pressure oil chamber 17, to reduce the pressure pulsation that is operated in the oil of discharging under the pressure along with among pump 15L that links and the 15R.Above-mentioned element is contained in the modulator block 18 of an aluminum.
The such pump structure that illustrates particularly among Fig. 3.As reference, pump 15L and 15R are arranged on the relative both sides of electrical motor 16 symmetrically, and they have identical structure.Describe for simplifying, in the following description, with only in conjunction with the structure of description pump 15L among pump 15L and the 15R and 15R.In this example, the label with the pump that is described is 15.
Pump 15 comprises that is formed on a hole 25 that forms in the modulator block 3, and like this, hole 4 is opened wide along the horizontal direction of modulator block 3, thereby inlet 23 and an outlet 24 that is connecting high pressure oil chamber 17 of being connected low pressure oil chamber 14 with one are connected.The main shaft 21 of electrical motor 16 is arranged on an end in hole 25.Piston 30 is arranged in the hole 25, and links to each other with the main shaft 21 of electrical motor 16, like this, piston 30 can according to the operation of electrical motor 16 along the hole 25 longitudinal direction crank motion.Lid 50 is connected on the open end in the hole 25 relative with electrical motor 16, thereby has formed a compression chamber 40 at lid 50 and in the hole 25 between the end of the piston 30 of lid 50.A retracing spring 41 is arranged in the compression chamber 40, thereby total towards electrical motor 16 pushing piston 30, thus, the piston 6 of shifting to lid 50 is returned towards electrical motor 16.
One access road 51 is formed on lid 50 and sentences with entering the mouth and 23 be connected.Compression chamber 40 is communicated with outlet 24.An access valve 60 and an outlet valve 70 are separately positioned on compression chamber 40 places and outlet 24 places.Access valve 60 is operated in relative mode according to the crank motion of piston 30 with outlet valve 70, thus opened/closed access road 51 and outlet 24 respectively.
The outlet valve 70 that is arranged on outlet 24 places allows the oil in the compression chamber 40 to flow to outlet 24, and the oil that prevents from simultaneously to export in 24 flow back into compression chamber 40.Outlet valve 70 has the function of common boiler check valve, exports 24 thereby only open when lid 50 moves when piston.
In addition, the access valve 60 that can be closed and opens access road 51 comprises: a ring-shaped valve seats 61, this valve seat 61 are arranged on the end corresponding to the lid 50 of the outlet of access road 51; One valve is moved/enclosed member 62, and this member is arranged to and can be moved between the position that valve opened/closed member 62 and valve seat 61 position contacting and valve opened/closed member 62 and valve seat 61 separate; One elastic component 63, this elastic component are always towards valve seat 61 pushing valve opened/closed members 62; And-holding element 64, this holding element 64 is arranged on lid 50 and sentences to keep closing and open/close member 62 and elastic component 63.
For fixing holding element 64, one toroidal extension 52 are extended from the end towards the lid 50 of compression chamber 40 between compression chamber 40 and modulator block 18.Holding element 64 closely is engaged on the toroidal extension 52.Access valve 60 is fixed in the appropriate location in the compression chamber 40 by being engaged in holding element 64 in the toroidal extension 52.
Because access valve 60 is fixed in the compression chamber 40 according to said structure, access valve 60 is along with piston 30 moves.Thus, the operation of valve opened/closed member 62 is not subjected to the restriction that piston 30 moves.Therefore, valve opened/closed member 62 can more easily be removed from valve seat 61.
That is to say, when the internal pressure of compression chamber 40 along with piston 30 during towards the mobile minimizing of electrical motor 16, elastic component 63 is by the compression of the oil pressure in the access road 51.Like this, valve opened/closed member 62 moves towards piston 30 in holding element 64, opens access road 51 thus.In this case, the moving the restriction of moving not to be subjected to piston 30 of valve opened/closed member 62 and carrying out apace.Therefore, the oil in the access road 51 can be introduced in the compression chamber 40 quickly to fill up compression chamber 40.
When the piston 30 of pump 15 when lid 50 moves, access valve 60 closures.Simultaneously, according to the operation of the opposite execution of access valve 60 operation, outlet valve 70 closures.Therefore, the oil in the compression chamber 40 is pumped in the high pressure oil chamber 17 by exporting 24.On the other hand, when piston 30 when electrical motor 16 moves, outlet valve 90 closures.Simultaneously, access valve 60 is opened.Therefore, the oil in the low pressure oil chamber 14 is introduced in the compression chamber 40 to fill compression chamber 40 by inlet 23 and access road 51.
The valve seat 61 of access valve 60 is outstanding from the end corresponding to the lid of the outlet of access road 51, thus have one with lid 50 incorporate loop configuration.Shown in the magnifying state among Fig. 4, comparing what use in the conventional situation is Frusto-conical structure, and valve seat 61 has a loop configuration.Thus, can realize the manufacturing of valve seat 61 at an easy rate.In addition, the area of the valve opened/closed member 62 that contacts with valve seat 61 reduces, and like this, valve opened/closed member 62 can more easily be removed from valve seat 61.Although valve seat 61 is outstanding from lid 50 in the embodiment shown in the present invention, valve seat 61 also can be by recessed a part of lid 50 forms around the zone that valve seat 61 is set.
Valve opened/closed member 62 is arranged to and can be moved between the position that valve opened/closed member 62 and valve seat 61 position contacting and valve opened/closed member 62 and valve seat 61 separate, and this valve opened/closed member 62 has a disc shaped structure.Valve opened/closed member 62 is provided with a flat opened/closed surface 62a towards lid 50, thereby contacts with valve seat 61 selectively.According to the disc-shaped structure of the valve opened/closed member 62 that is provided with flat mating surfaces 62a, when opening, access valve 60 trends towards concentrating on the valve opened/closed member 62 from the oil that access road 51 flows into compression chamber 40.In this case, the area of the valve opened/closed member 62 of contact oil also reduces.Thus, valve opened/closed member 62 can be removed apace from valve seat 61, thereby easily opens access valve 60.
Valve opened/closed member 62 uses the plastic material injection molding to form.Thus, at valve opened/closed member 62 be formed between the metal valve seat 61 at lid 50 places and can not produce magnetic force.Like this, when valve opened/closed member 62 when valve seat 61 is removed, can not have residual magnetic force between valve seat 61 and the valve opened/closed member 62.In addition, reduced the weight of valve opened/closed member 62, like this, the force of inertia of valve opened/closed member 62 reduces.Thus, shift to lid 50 back valve opened/closed members 62 immediately when valve seat 61 is removed when valve opened/closed member 62, this moving can reach at an easy rate.
Simultaneously, Fig. 5 shows pump according to another embodiment of the present invention.As shown in Figure 5, according to this embodiment of the invention, a valve seat 81 is arranged on independent seat member 80 places that link to each other with lid 50.This member 80 closely is engaged in the toroidal extension 52 between holding element 64 and lid 50.Seat member 80 adopts a plastic material to form, and like this, valve seat 81 is integrally formed with seat member 80.Thus, can more easily realize the shaping of valve seat 81.
An alternative embodiment of the invention has been shown among Fig. 6.As shown in Figure 6, valve seat 90 is outstanding circlewise from the opened/closed of valve opened/closed member 62 surface 62a, and valve seat 90 contacts with the part of the lid 50 of the outlet that centers on access road 51 thus, or partly separate with this lid.Valve seat 90 becomes one with valve opened/closed member 62.Be similar to above-mentioned example, valve opened/closed member in this example 62 is made by plastic material.Thus, can easily realize the shaping of valve seat 90.In addition, the force of inertia of valve opened/closed member 62 reduces.Thus, can more easily realize opening of access valve 60.
Then, description is applied to operation and this pump operated function and the effect of the pump in the electronically controlled brake system of an Antilock brake system.Although pump according to the above embodiment of the present invention is structurally slightly different, the work of pump is carried out with the same manner.Thus, below only the operation in conjunction with the pump of the first embodiment of the present invention shown in Fig. 3 and 4 be described.
Antilock brake system is with three kinds of pattern control brake pressure, that is, pressure reducing mode, boost mode and pressure keep pattern, to prevent vehicle slip. Electromagnetic valve 14a and 14b carry out the hydraulic pressure that is transferred to hydraulic brake 13 that the open and close operation is done according to the merit of pump 15L and 15R with control repeatedly.When the driver exerts pressure to brake pedal 10, produce braking force by the hydraulic brake pressure of setting up in each hydraulic brake 13 through servosystem 11 and main clutch release slave cylinder 12.Brake-pressure in each hydraulic brake 13 is too high, and more ground-surface situation must be reduced to braking force a proper level.In this example, ECU20 controls each NO electromagnetic valve 14a closure, and control NC electromagnetic valve 14b opens.
On the other hand, when the braking pressure control pattern remained in the pressure reducing mode for a long time, perhaps, when vehicle moved to high regional of ground-surface friction coefficient, the friction force that produces between the tire of vehicle and the ground increased, and reduces brake efficiency thus.This situation detects by ECU20 according to the signal that is sent to ECU20 from each wheel sensor 19.In case detect this situation, ECU20 control motor 16 driving pump 15L and 15R thus, make the brake-pressure increase in each hydraulic brake 13.That is to say that the oil that is stored in each low pressure oil chamber 14 supplies to the high pressure oil chamber 17 that links under pressure.Then, the electric power of each NO electromagnetic valve 14a is supplied with and is cut off, and NO electromagnetic valve 14a is opened.Like this, supply to the hydraulic brake 10 that links from the oil of each high pressure oil chamber 17 by the NO electromagnetic valve that links, open, the hydraulic brake pressure in the hydraulic brake 13 can increase like this.
In boost mode, be stored in oil in each low pressure oil chamber 14 in brake operation course along with the driving of pump 15L that links or 15R and pressurized, like this, the oil of pressurization supplies to the NO valve 14a that links by high pressure oil chamber 17 that links and the hole 17a that links.In this case, each pump 15L and 15R operate in the following manner.
That is to say that when the inclined to one side main shaft 21 of electrical motor 16 rotated, the pistons 30 in the hole 25 were shifted to lid 50, the oil pressure in the compression chamber 40 are increased.Like this, valve opened/closed member 62 contacts with valve seat 61.Along with such operation of access valve 60, access road 51 closures.Thus, outlet valve 70 makes the oil in the compression chamber 40 enter in the high pressure oil chamber 17 by exporting 24 owing to the oil pressure that increases in the compression chamber 40 is opened thus.
On the other hand, when the elasticity by retracing spring 41 made piston 30 shift to electrical motor 16 oil pressure in the compression chamber 40 is descended, valve opened/closed member 62 was by removing from valve seat 61 from the pressure of the oil of access road 51.Thus, access valve 60 is opened access road 51.At this moment, outlet valve 70 closures in contrast to access valve 60 operations export 24.Like this, the oil in the low pressure oil chamber 14 is introduced in the compression chamber 40 to fill compression chamber 40 by inlet 23 and access road 51.
Because access valve 60 is installed on lid 50 regularly, access valve 60 is not subjected to piston 30 crank motions to limit ground stationary state of maintenance in compression chamber 40.Thus, valve opened/closed member 62 can move apart valve seat 61 apace.Thus, the filling speed of oil in compression chamber 40 can be enhanced.
In addition, valve opened/closed member 62 has the flat opened/closed surface 62 towards valve seat 61, with the area of the valve opened/closed member 62 that reduces to contact with access road 51, and will only concentrate on the opened/closed surface 62 from the oil that access road 51 is supplied with.Thus, can more easily realize the opening operation of valve opened/closed member 62.
Because access valve 60 is configured to valve opened/closed member 62 and can removes from valve seat 61 fast, as mentioned above, the performance of moving operation of access valve 60 can improve.Thus, the oil from the ingate can be filled in the compression chamber 40 apace.
Can it is evident that from the above description in the pump according to electronically controlled brake system of the present invention, access valve is fixed in the compression chamber, like this, access valve is opened the restriction that can not be subjected to reciprocating motion of the pistons with the operation of closed access road.Thus, valve opened/closed member 62 can move apart valve seat apace.Thus, an advantage is that the opening operation performance of access valve improves, thereby realizes filling in the compression chamber raising of the speed of oil.
Although illustrated and described the several embodiment of the total inventive concept of the present invention, but under the prerequisite that does not break away from the principle of the invention and spirit, those of ordinary skill in the art can make change to these embodiment, and scope of the present invention will be limited by appending claims and their equivalent.
Claims (11)
1. the pump of an electronically controlled brake system comprises: a modulator block; One is formed on the hole in the modulator block, and this hole is communicated with entrance and exit in being formed on modulator block; One piston, this piston links to each other with a main shaft of the electrical motor of an end that is arranged on described hole, and this piston is arranged in the described hole, thereby piston can be in described hole crank motion; One lid, this lid links to each other with the other end in described hole, thereby has formed a compression chamber at lid with between an end of the piston of lid; And a retracing spring, described retracing spring is arranged in the compression chamber, thereby always towards the electrical motor pushing piston,
Wherein, compression chamber is communicated with outlet, and
Wherein, pump also comprises:
An outlet valve, described outlet valve is arranged on described exit, opening and closed outlet, thereby allows the oil in the compression chamber to discharge in compression chamber by outlet in the state that outlet is opened;
One access road, described access road is formed in the lid, is transported to compression chamber with the oil in will entering the mouth; And
One access valve, described access valve are arranged in the compression chamber in exit of access road, and are fixed in lid, and to open and closed access road, described access valve and outlet valve are operated on the contrary.
2. pump as claimed in claim 1 is characterized in that described access valve comprises
One ring-shaped valve seats, described ring-shaped valve seats is arranged on the exit of described access road;
One disc shaped valve opened/closed member, described member are arranged to and can be moved between the second place that primary importance that described valve opened/closed member contacts with valve seat and described valve opened/closed member and valve seat separate;
One elastic component, described elastic component are always towards valve seat pushing valve opened/closed member; And
One holding element, described holding element is fixed in lid, with receive valve opened/closed member and elastic component.
3. pump as claimed in claim 2 is characterized in that:
Described lid is provided with a toroidal extension, and extend on described toroidal extension surface from lid towards compression chamber between compression chamber and modulator block; And
Described holding element closely is engaged in the extendible portion.
4. pump as claimed in claim 2 is characterized in that:
Described valve seat is outstanding from lid towards valve opened/closed member; And
Described valve opened/closed member has a plane surface that contacts with valve seat when valve opened/closed member moves on to primary importance.
5. pump as claimed in claim 2 is characterized in that, described valve seat and lid are one.
6. pump as claimed in claim 2 is characterized in that, described valve seat is arranged on an independent seat member place that links to each other with described lid.
7. pump as claimed in claim 6 is characterized in that described valve seat is made by plastic material.
8. pump as claimed in claim 1 is characterized in that, described access valve comprises:
One disc shaped valve opened/closed member; And
One ring-shaped valve seats that becomes one with described valve opened/closed member, described ring-shaped valve seats goes out from a distal process of valve opened/closed member, and described valve seat can move between the second place that primary importance that described valve seat contacts with described lid and described valve seat and described lid separate.
9. as claim 2 or 8 described pumps, it is characterized in that valve opened/closed member is made by plastic material.
10. pump as claimed in claim 1 is characterized in that, described access road comprises:
One oil main line, described oil main line is communicated with compression chamber; And
A plurality of auxiliary oil channels, described auxiliary oil channel is communicated with inlet.
11. pump as claimed in claim 1 is characterized in that, outlet valve comprises a boiler check valve, and only when piston was shifted to lid, described boiler check valve was opened outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100956558A CN100360355C (en) | 2004-11-26 | 2004-11-26 | Electronically controlled pump for brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100956558A CN100360355C (en) | 2004-11-26 | 2004-11-26 | Electronically controlled pump for brake system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1778609A true CN1778609A (en) | 2006-05-31 |
| CN100360355C CN100360355C (en) | 2008-01-09 |
Family
ID=36769110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100956558A Expired - Fee Related CN100360355C (en) | 2004-11-26 | 2004-11-26 | Electronically controlled pump for brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100360355C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686883A (en) * | 2009-12-23 | 2012-09-19 | 罗伯特·博世有限公司 | Piston pump for a hydraulic vehicle braking system |
| CN105109473A (en) * | 2014-04-30 | 2015-12-02 | 株式会社万都 | Hydraulic brake system |
| CN112240291A (en) * | 2019-07-18 | 2021-01-19 | 罗伯特·博世有限公司 | Pump device for a brake system of a motor vehicle, brake system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5529466A (en) * | 1994-09-27 | 1996-06-25 | Kelsey-Hayes Company | Reciprocating valved piston hydraulic pump assembly for anti-lock braking system |
| SE9502279L (en) * | 1995-06-22 | 1996-07-22 | Durgo Ab | Suction preventing valve device |
| KR100222356B1 (en) * | 1996-07-17 | 1999-10-01 | 도오다 고오이찌로 | Brake control apparatus for an automobile |
| DE19747851A1 (en) * | 1997-10-30 | 1999-05-06 | Bosch Gmbh Robert | Piston pump |
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2004
- 2004-11-26 CN CNB2004100956558A patent/CN100360355C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686883A (en) * | 2009-12-23 | 2012-09-19 | 罗伯特·博世有限公司 | Piston pump for a hydraulic vehicle braking system |
| CN102686883B (en) * | 2009-12-23 | 2015-07-15 | 罗伯特·博世有限公司 | Piston pump for a hydraulic vehicle braking system |
| CN105109473A (en) * | 2014-04-30 | 2015-12-02 | 株式会社万都 | Hydraulic brake system |
| CN105109473B (en) * | 2014-04-30 | 2018-04-20 | 株式会社万都 | Brake fluid system |
| CN112240291A (en) * | 2019-07-18 | 2021-01-19 | 罗伯特·博世有限公司 | Pump device for a brake system of a motor vehicle, brake system |
| US11498539B2 (en) | 2019-07-18 | 2022-11-15 | Robert Bosch Gmbh | Pump device for a brake system of a motor vehicle, brake system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100360355C (en) | 2008-01-09 |
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