CN1136295A

CN1136295A - Valve assembly of hydraulic pressure control system for automobile ABS system

Info

Publication number: CN1136295A
Application number: CN94194330A
Authority: CN
Inventors: 池东瀷
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-08
Filing date: 1994-10-07
Publication date: 1996-11-20

Abstract

The present invention provides a valve assembly for controlling oil pressure of anti-lock brake system (ABS) in an automobile. The valve assembly comprises a first valve chamber which has a port connected to a master cylinder; a second valve chamber which is hydraulically communicated with the first valve chamber and has another port connected to the ABS; a first check valve which is enclosed in the first valve chamber to open or close inlet passage by spring and a pilot pressure; and a solenoid valve which is enclosed in the second valve chamber to open or close a drain passage. The valve assembly may be designed in the other various constructions to be used for the effective blockings of an inverse pressure and an excessive pressure over the necessary value, by the alternative opening and closing of the inlet passage and the drain passage.

Description

The valve module that is used for the hydraulic control device of automobile anti-lock braking brake gear

Background technology

The present invention relates generally to the anti-lock brake device (ABS) of automobile, particularly prevent the valve module that hydraulic pressure flows backwards and oil pressure increases, thereby make anti-lock brake more effective.

Description of the Prior Art

Automobile will have good driving performance, must have actv. and quicken and decelerating behavior, from the viewpoint of safety, must have good braking property especially.The actv. braking property refers to can emergency brake and bearing circle rotates freely, thereby prevents the maloperation of brake gear and malfunctioning, and mounting or dismounting easily when brake gear breaks down.

In order to satisfy above-mentioned various requirement, the brake gear of general automobile is assembled into a device of effectively working for the parts by wheel cylinder, brake tread plate, boost pump, hydraulic reservoir, master cylinder, hydraulic pipe, fluid control valve and other interconnection.Because the very fast decline of friction coefficient between the rapid rising of temperature of the friction portion during the automobile urgent brake car between road surface and wheel face and road surface and the wheel face of being made by organic material (synthesizing or natural rubber), so automobile can skid on the road surface and make chaufeur restive.People have invented anti-lock brake device (ABS) for preventing this phenomenon (degeneration or the effect of skidding), and this device is alternately decontroled and embraced wheel and arrives hundreds of several times when running at high speed sudden stop.Even the ABS device can prevent wheel by locking, shortened braking distance step on brake also can Control of Automobile during tread plate, especially can control bearing circle.

Mechanism and flow of pressurized that it is total are as follows.

The sensor of ABS device is the rotating speed of monitoring wheel all the time, and its signal that sends is delivered to the electronic control device of automotive engine.During braking automobile,, just reduce brake fluid pressure if the deceleration value of automobile surpasses a predetermined value.On the contrary, if acceleration figure increases, brake fluid pressure just begins to increase, thereby embraces wheel and stop automobile to overtake.

Fig. 1 is the structural representation of the modulator 1 in the ABS device.Modulator comprises a flow-controlling gate 2 of lifting oil pressure according to the action of a valve rod and an electromagnetic valve 7, and this control cock 2 has at least four parts, i.e. first pipeline 3, second pipeline 4, the 3rd pipeline 5 and the 4th pipeline 6.When electromagnetic valve when electronic control device is received opening signal, the oil of first pipeline 3 and second pipeline 4 flows back to fuel tank and reduces brake-pressure through third and

fourth pipeline

5 and 6, and when electromagnetic valve 7 is shut, brake-pressure increases and embraces wheel.

Shown in this existing ABS, the hydraulic pressure of braking force directly passes on the tread plate of chaufeur and chaufeur is felt under the weather, because the oil pressure of second conduit 11 and the 3rd conduit 12 passes to master cylinder 13 through first conduit 10.The ABS device alternately raises when sudden stop and the brake-pressure that descends constantly passes on the chaufeur pin and makes the vibration of brake tread plate.In addition, the impulse force of plugging pressure passes on the check valve apparatus in this pump.Thereby shorten the life-span of this valve gear, cause the ABS device to lose its proper property.And owing to distribute to first conduit by the oil pressure of master cylinder 13 transmission, therefore, a common problem is that brake-pressure reduces 1/3rd or over half.

Summary of the invention

For overcoming above-mentioned shortcoming, the purpose of this invention is to provide a kind of more efficiently valve module, thereby detect the counter-flow of brake solution and effectively cut off with at least two valve chambers.

For realizing above-mentioned purpose of the present invention, a preferred embodiment of valve module of the present invention comprises: first valve chamber, this valve chamber have first pipeline that communicates with master cylinder; Second valve chamber that communicates with first valve chamber, it has second pipeline to lead to ABS; First boiler check valve in first valve chamber, it opens or shuts the import that communicates with first pipeline by a spring and the described first ducted pilot pressure; And second the electromagnetic valve in the valve chamber, second boiler check valve is housed on it, thereby is subjected to the manipulation of electromagnetic valve to open or shut the outlet of leading to second pipeline.

In another preferred embodiment, this valve module comprises: first valve chamber, the first different sleeve pipe of diameter and second sleeve pipe and a valve rod are arranged in this valve chamber, this valve rod has a central hole and is supported to by a spring and leaves an outlet slightly, one boiler check valve is housed on this valve rod, thereby opens or shut this drain pipe by this spring and the first ducted pilot pressure; Second valve chamber has the 3rd different sleeve pipe of diameter and a quadruplet pipe and a valve rod against a boiler check valve in this valve chamber, this boiler check valve is supported by a spring, and first valve chamber and second valve chamber communicate.

In another embodiment, valve module provided by the invention comprises: a upper sleeve, one block that has half spherical seat face on it is arranged in this sleeve pipe, adorn one in this block and be subjected to a supported by springs boiler check valve and its inside that one passage that described seat surface portion center is communicated with this block one side is arranged; One diameter is less than the middle parts casing pipe of described upper sleeve; One diameter has a pipeline to lead to ABS greater than the following parts casing pipe of parts casing pipe in described on its bottom; One is contained in described three sleeve pipes and the valve rod that can slide up and down, and there is a perforation at its center; And one be arranged on an outlet outside that leads to this Drainage pipe, supported by a spring and against a boiler check valve that is positioned at the lug of described valve rod bottom.

Brief Description Of Drawings

From following explanation in conjunction with the accompanying drawings, can know and find out purpose of the present invention, further feature and advantage, in the accompanying drawing:

Fig. 1 is the constructional drawing of existing ABS device;

Fig. 2 is the section-drawing of the electronically controlled valve gear of first embodiment of the invention;

Fig. 3 is the section-drawing of valve gear of the mechanical control of second embodiment of the invention;

Fig. 4 is the single valve formula control cock device of third embodiment of the invention.

The detailed description of invention

In first embodiment of the invention shown in Figure 2, first pipeline 15 that leads to master cylinder is connected to a side of first valve chamber 16, and second pipeline 17 is received the top margin of second valve chamber 19, and an electromagnetic valve 18 that second boiler check valve is housed on it is arranged in this valve chamber 19.In first valve chamber 16, boiler check valve 22 is subjected to the support of a spring 20 and opens import 21 all the time.Have one to open the electromagnetic valve 18 of outlet 23 all the time in second valve chamber 19.Also can do tapered, plate shape or other suitable shape on demand for the shape of the ball check valve shown in the casehistory 22 in the accompanying drawing.

When electromagnetic valve 18 during according to the signalizing activity of hydraulic pressure transducer, above-mentioned control cock assembly cuts off outlet 23 and the counter-flow hydraulic pressure among the ABS is not passed to master cylinder.Boiler check valve 22 in first valve chamber 16 prevents that too high hydraulic pressure from passing to wheel cylinder because when the too high hydraulic pressure of master cylinder when leader channel 24 transmits, this too high hydraulic drive is subjected to the valve rod 25 of spring 20 supports and blocks import 21.Also promptly,, effectively block the reverse hydraulic pressure in the ABS device, also block simultaneously above the too high hydraulic pressure of desirable value and will not transmit by alternately opening and closing import 21 and outlet 23.

A weak point of said modules is that electromagnetic valve 18 only just moves when receiving the signal of hydraulic pressure transducer, therefore will cause major accident if maloperation occurs.

Please see Fig. 3 that second embodiment of the invention is shown, first pipeline 15 that leads to master cylinder was listed in two valve chambers that separate with second pipeline that leads to the ABS device in 17 minutes, and this assembly is for wherein being equipped with the physical construction of a valve rod.

The first different sleeve pipe 26 of diameter and second sleeve pipe 27 are arranged in first valve chamber 25, and its center valve rod 29 that one hole 28 arranged is supported to by a spring 30 and leaves outlet 31 certain distances.

One valve rod 36 at its center porose 35 that the 3rd different sleeve pipe 33 of diameter and quadruplet pipe 34 is arranged in second valve chamber 32 and supported by a spring 37, the bottom of valve rod 36 is against a boiler check valve 39.

The following describes the service condition of above-mentioned control cock assembly.

When the too high hydraulic pressure that is subjected to from master cylinder, the too high hydraulic pressure that exports 31 places enters through hole 28 in the space of being defined by first sleeve pipe 26 and moves down valve rod 29.When this power of mobile valve rod 29 during greater than the elastic force of spring 30, valve rod 29 moves down shown in arrow A among Fig. 3 and blocks outlet 31 (shown in dotted line), thereby prevents that the power that surpasses the brake actuation force from passing to wheel cylinder and guaranteeing the smooth working (promptly repeatedly embrace and decontrol) of ABS at the wheel cylinder place.When too high hydraulic pressure from ABS when second pipeline imports into, this excess pressure passes to the 3rd sleeve pipe 33 again and mobile as shown by arrow B valve rod 36., the reset force of support spring 38 prevents the transmission of hydraulic pressure thereby blocking mouthful 33a.

Therefore, because fluid-pressure transmission is effectively controlled without the electronics package of hydraulic pressure transducer and electromagnetic valve and so on, therefore can eliminate the possibility of malfunctioning or maloperation.

According to third embodiment of the invention, a kind of control cock assembly compacter than above-mentioned control cock assembly is provided, it has only a valve chamber, but can realize all functions of assembly.Fig. 4 illustrates the section-drawing of third embodiment of the invention.

In a valve body 40, have diameter all than one in big upper sleeve 42 and the following parts casing pipe 43 of parts casing pipe 41.In these three

sleeve pipes

41,42 and 43, be inserted with one and support by a spring 44 and can move up and down and there is the valve rod 45 of perforation 46 at its center, export 47 outsides have one by spring 48 support and with valve rod 45 bottoms on a lug 45a against boiler check valve 49.In upper sleeve 42, a block 51 is arranged, there is a diameter to be a bit larger tham the semisphere seat surface portion 50 of the diameter on valve rod 45 tops on it.There are a passage 56 and a boiler check valve 55 by a spring 54 supports in central authorities at block 51.The pipeline 52 that communicates with master cylinder is arranged on one side of upper sleeve 42, and the bottom of valve body 40 communicates with ABS.When needing, the high pressure gas of available nitrogen and helium and so on replace spring 44 and put accurate valve rod 45.Valve rod 45 is used for accepting changing the area on the surface of oil pressure less than parts casing pipe 43 1 ends down at the face area of upper sleeve 42 1 ends.

In a spring that supports the valve rod 45 that moves up and down is arranged on the part of parts casing pipe 41, this sleeve pipe separates with the following parts casing pipe 43 that entangles valve rod.

At first, when too high hydraulic pressure was added to pipeline 52 by master cylinder, this hydraulic pressure that enters upper sleeve 42 46 passed to down parts casing pipe 43 through the hole.Then, because the face area on the top of valve rod 45 in upper sleeve is less than the face area of the bottom in following parts casing pipe, therefore cause a difference of pressure, boiler check valve 49 valve rod 45 that moves up as shown in the figure, this top is inserted the spherical seat surface of semicircle portion 50 and is blocked the inlet in hole 46 by boiler check valve 55 simultaneously.Therefore, if touch on the brake suddenly, just blocking automatically of too high hydraulic pressure (promptly surpassing the hydraulic pressure that braking is pressed), thus obtain best braking effect.

Secondly, when when the Drainage pipe 53 that communicates with ABS transmits too high hydraulic pressure, move on the valve rod 45 and block outlet 47, thereby prevent that reverse hydraulic pressure from reaching master cylinder, thereby make bounce can't reach the brake tread plate.

The 3rd, chaufeur reduces the hydraulic pressure of master cylinder in case decontrol the brake tread plate, and boiler check valve 55 is just opened, and the hydraulic pressure of following parts casing pipe is 46 removals through the hole, and valve rod 45 moves down as shown by arrows and opens boiler check valve 49 and shed the hydraulic pressure of Drainage pipe 53 and the gripping power of brake.

As mentioned above, an advantage of control cock assembly of the present invention is the wearing and tearing and the distortion that can prevent piston cup, because can eliminate the impulse force on the piston cup that acts in the master cylinder by blocking reverse hydraulic pressure.

Simultaneously, because the bounce that constantly passes on the brake pedal during ABS work disappears, therefore eliminated the sense of discomfort that caused to chaufeur originally, and, because the reverse hydraulic pressure that passes to master cylinder all passes to wheel cylinder, therefore another advantage of this assembly is, can brake effectively under low hydraulic pressure.

Claims

1, the valve module that is used for the hydraulic control device of automobile anti-lock braking brake gear (ABS) wherein, has a liquid flow control valve in this valve module, the lifting oil pressure by handling valve rod and valve, and described valve module comprises:

First valve chamber (16), it has first pipeline (15) that communicates with master cylinder;

Second valve chamber (19), it communicates with first valve chamber (16) and second pipeline (17) that communicates with ABS is arranged;

Be contained in first boiler check valve (22) in first valve chamber (16), it opens or shuts the import (21) of leading to first pipeline by the guide's hydraulic pressure in a spring (20) and described first pipeline (15); And

Be contained in the electromagnetic valve (18) in second valve chamber (19), second boiler check valve is housed on it, can open or shut the outlet (23) of leading to second pipeline thereby handle this electromagnetic valve.

2,, comprise that further one is connected and is shut by described guide's hydraulic actuated the piston (30a) of first boiler check valve with first boiler check valve (22) by the described valve module that is used for the hydraulic control device of automobile ABS device of claim 1.

3, the valve module that is used for the hydraulic control device of automobile ABS device wherein, has a liquid flow control valve in this assembly, the lifting oil pressure by handling valve rod and valve, and described valve module comprises:

First valve chamber (25), the valve rod (29) that there is a perforation (28) at different first sleeve pipe (26) of diameter and second sleeve pipe (27) and its center wherein is housed, this valve rod (29) is supported to by a spring (30) and leaves outlet (31) slightly, one boiler check valve (29a) is housed on this valve rod (29), thus this spring (30) and open or close upper outlet (31) according to guide's hydraulic pressure of first pipeline (15); And

Second valve chamber (32), different the 3rd sleeve pipe (33) of diameter and quadruplet pipe (34) and one are arranged by spring (37) supports, there is a perforation (35) at its center valve rod (36) in this valve chamber (32), the bottom of this valve rod (36) is against a boiler check valve (39) by spring (38) support, and first valve chamber (25) communicates with second valve chamber (32).

4, by the described valve module that is used for the hydraulic control device of automobile ABS device of claim 3, wherein, locate one from the pipeline (15) that communicates with master cylinder and the import of the oil pressure that comes in first sleeve pipe (36) bottom near outlet (31), and have oil pressure outlet to lead to the Drainage pipe (17) that communicates with ABS in quadruplet pipe (34) bottom.

5, be used for the valve module of the hydraulic control device of the oil pressure of ABS device in the Control of Automobile in the automobile ABS device, wherein, a liquid flow control valve arranged in this assembly and by handling valve rod and valve lifting oil pressure, described valve module comprises:

One upper sleeve (42) wherein has a link stopper (51) that half spherical seat face (50) arranged on it, the passage (56) that a boiler check valve (55) that is supported by spring (54) is arranged in this block (51) and described seat surface portion is communicated with these block (51) one sides;

Diameter less than described upper sleeve one in parts casing pipe;

Diameter has the following parts casing pipe of the pipeline that communicates with ABS greater than parts casing pipe, its bottom in described;

One is enclosed in described three sleeve pipes (40), (41) and (43), and the valve rod moving up and down (48) of a perforation is wherein arranged; And

One is arranged on an exterior boiler check valve of outlet (47) (49) that leads to this Drainage pipe communicate with ABS, and this boiler check valve is supported by a spring (48) and a lug (45a) on described valve rod (45) bottom.

6,, wherein, the non-oxidizing gas of nitrogen, helium or its miscellaneous gas and so on is fed to the position of the shock mount (44) of middle parts casing pipe (57) by the described valve module that is used for the hydraulic control device of automobile ABS device of claim 5.