CN100526129C - Electric control load sensor proportion valve - Google Patents
Electric control load sensor proportion valve Download PDFInfo
- Publication number
- CN100526129C CN100526129C CNB2006100695398A CN200610069539A CN100526129C CN 100526129 C CN100526129 C CN 100526129C CN B2006100695398 A CNB2006100695398 A CN B2006100695398A CN 200610069539 A CN200610069539 A CN 200610069539A CN 100526129 C CN100526129 C CN 100526129C
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Abstract
The invention provides an electric control load-sensitive indeterminacy valve, which comprises an upper valve body, a lower valve body, a normal-close two-state two-way electromagnetic control valve, and a load sensor, wherein the lower valve body is provided with a two-stage piston and a valve integration, the side wall of the two-stage piston and the lower valve body are sealed to form a vacuum-proof chamber of which the lower end face forms an output chamber with the lower valve body and the valve integration. The invention is characterized in that the chamber at the center of the two-stage piston is provided with a balance piston integration, the vacuum-proof air channel of the vacuum-proof chamber and the balance piston form an exhaust channel communicated with the valve integration, the upper valve body is provided with a pressure-adjusting piston integration, to form a control chamber with the upper end face of the two-stage piston and the upper valve body, the side wall of the upper valve body is provided with an air inlet channel, an air outlet channel, and an air channel, relatively communicated with a control opening, an air inlet channel and an air outlet channel of an electromagnetic control valve, a control chamber, another control chamber, and the lower end face of the pressure-adjusting piston. The invention can keep brake stability and better performance under variable loads and speed reductions.
Description
Technical field
The invention provides a kind of electric-controlled load sensing proportion valve, belong to the automobile brake technical field.
Background technology
Along with China's express highway backbone network basically forms, large-tonnage, goods carrying vehicle and long wheelbase superimposed trailer, trailer with obvious ton-kilomiter cost advantage also increase year by year.Its wheelbase increases, and brake piping also extends accordingly, and to the long wheelbase vehicle of running at high speed, reflection time lag, the braking force deficiency of air braking system remain subject matter.And existing load sensing valve exists the braking force of being exported when unloaded to cross lowly can not to satisfy the required braking force of long wheelbase vehicle, the braking time lag of back axle during heavy duty, and braking is felt like jelly.Also there is heavily loaded back axle braking force deficiency in common relay valve, braking in the process of moving or during semi-brake, the propons braking force is greater than the back axle braking force, the braking of chaufeur sensation back axle is felt like jelly, cause braking effect not good, occur traffic accident when especially bad weather, road conditions are not good easily.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can overcome above-mentioned defective, automatically regulate the electric-controlled load sensing proportion valve of braking pressure, highly sensitive, excellent working performance, good stability.Its technology contents is:
A kind of electric-controlled load sensing proportion valve, comprise by upper valve body, the valve body that following valve body constitutes, solenoid electric valve of captiveing joint and load transducer with upper valve body, wherein descend two-diameter piston and valve assembly from up to down are installed in the valve body successively, stepped sidewall between big end driving surface of two-diameter piston and the small end driving surface constitutes vacuum chamber prevention E with following valve seal, two-diameter piston is positioned at greatly, have horizontal anti-vacuum way between the small end driving surface and be communicated with vacuum chamber prevention E, the lower surface of two-diameter piston constitutes output cavity D with following valve body and valve assembly, following valve body is provided with admission port and air extractor duct, wherein admission port is communicated with the outer wall of valve assembly, air extractor duct is communicated with output cavity D, it is characterized in that: the two-diameter piston center is provided with inner chamber, the inner chamber internal fixation is equipped with the dummy piston assembly, the intracavity sidewall sealing of dummy piston assembly and two-diameter piston, the other end of anti-vacuum way is communicated with the exhaust duct of valve assembly through the dummy piston assembly, solenoid electric valve is a normally closed bi-bit bi-pass solenoid electric valve, in upper valve body, set up the relief piston assembly, comprise positioning seat, the pressure spring seat, pressure spring, relief piston, check valve, spring and spring perch, wherein the outer wall of positioning seat and relief piston all with the inner wall sealing of upper valve body, the pressure spring seat is installed in the below of positioning seat, pressure spring is fitted between the upper surface of pressure spring seat and relief piston, check valve and spring perch be installed in successively relief piston below, pressure mounting of the spring is between the upper surface of the bottom of check valve and spring perch, the lower surface of spring perch and the upper surface of two-diameter piston and upper valve body constitute control chamber C, the upper valve body sidewall is provided with inlet channel, gas off-take and air flue, wherein inlet channel is communicated with the inlet channel of control mouth and solenoid electric valve respectively, gas off-take is communicated with the gas off-take and the control chamber C of solenoid electric valve respectively, and air flue is communicated with the lower surface of control chamber C and relief piston respectively.Two-diameter piston makes it have the transformation function by the dummy piston assembly is installed, and can satisfy the requirement that improves braking force, has to have solved the slow problem of braking time of removing.
Described electric-controlled load sensing proportion valve, the dummy piston assembly comprises seal cartridge, dummy piston and balance spring, wherein the upper and lower end of the outer ancient piece of jade, round, flat and with a hole in its centre of seal cartridge is equipped with the internal chamber wall sealing of seal ring and two-diameter piston, and seal cartridge is being provided with the air flue that is communicated with anti-vacuum way between upper and lower two seals circle, the seal cartridge bottom has exhaust duct and communicates with atmosphere through valve assembly, balance spring is fitted in the seal cartridge, and the upper end of balance spring contacts at the lower surface of dummy piston.
Described electric-controlled load sensing proportion valve is equipped with seal ring on two sidewalls of two-diameter piston and following valve seal, anti-vacuum way is arranged on two-diameter piston between the two seals circle, and E is communicated with vacuum chamber prevention.
Described electric-controlled load sensing proportion valve, valve assembly comprises valve, valve seat, valve spring, guide holder, the guide holder sealing that wherein is set with valve spring is installed in down in the valve body, valve is contained on the guide holder from the upper end sealing shroud, valve seat is fitted on the valve from the upper end sealing, and with following valve seal, the lower surface of admission port communication valve gate seat.
Described electric-controlled load sensing proportion valve, the sensing element of load transducer adopt adjustable roller pivoted arm feeler lever, contact with suspension, and the mouth of load transducer connects the power end of solenoid electric valve through the stop lamp switch of master brake cylinder.
Described electric-controlled load sensing proportion valve, the bottom of following valve body is provided with the noise reduction dust boot corresponding to the exhaust duct end of valve assembly.
Its principle of work is:
Unloaded glancing impact, the deflection of suspension is little, and sensing element is not stressed, the load transducer work of not switching on.The control atmospheric pressure is opened valve by the upper surface promotion piston that the gap between one-way cock and the relief piston enters two-diameter piston, and bleed pressure is exported through delivery port.The rising of the control air pressure along with main valve has overcome relief piston when reaching certain numerical value spring force promotes to move on the relief piston, this moment one-way cock under the combined action of control atmospheric pressure and one-way cock spring force with the sealing surface sealing of upper shell, the control air pressure that main valve is next enters the gas circuit of the top of piston and shuts, this moment, the movable valve plug in the solenoid electric valve seal admission port of solenoid electric valve under the application force of valve core spring, the control mouth atmospheric pressure can't communicate with control chamber C by the solenoid electric valve gas off-take.How the control air pressure no matter main valve comes raises, and the output pressure of electric-controlled load sensing proportion valve delivery port maintains control air pressure gas circuit and shuts in the preceding range of pressure ratio value of the control atmospheric pressure of master cylinder and the output pressure power of output cavity D.This moment, the braking force of back axle was lower than the braking force 20%-50% of propons, the size that the adhesion value that has increased propons makes its braking force as far as possible and the adhesion value between tire and the ground adapt.
The deflection of heavy duty glancing impact suspension increases, the stressed displacement of sensing element, and load transducer begins to accept to be installed in the electric signal of the stop lamp switch of master brake cylinder according to sensing element, and connects the circuit of solenoid electric valve.Because this moment, solenoid electric valve was in energising work, the control atmospheric pressure is opened valve by the upper surface promotion piston that the gap between one-way cock and the relief piston enters two-diameter piston, and the control bleed pressure is exported through delivery port.The rising of the control air pressure along with main valve has overcome relief piston when reaching certain numerical value spring force promotes to move on the relief piston, this moment one-way cock under the combined action of control atmospheric pressure and one-way cock spring force with the sealing surface sealing of upper shell, the control air pressure that main valve is next enters the gas circuit of the top of piston and shuts, but solenoid electric valve movable valve plug under the effect of electromagnetic force overcomes valve core spring and moves, and opens the admission port of solenoid valve seat.This moment control mouthful the control atmospheric pressure communicate with control chamber C by the solenoid electric valve gas off-take, continue the promotion piston and open valve.And, improve 15%-50% braking force that does not wait by the pressure ratio that two-diameter piston has amplified control chamber and output cavity, this moment, vacuum chamber prevention E communicated with atmosphere.When the atmospheric pressure of control chamber C during, promote dummy piston and move down the gas circuit that sealing vacuum chamber prevention E communicates with atmosphere greater than the spring force of balance spring.The atmospheric pressure of control chamber C enters in the vacuum chamber prevention E by the air flue and the anti-vacuum way of seal cartridge, makes the upper and lower operative end surface gas pressure balance of two-diameter piston, and the pressure ratio of control chamber and output cavity is become output in 1: 1.The requirement of required braking force when promptly having satisfied heavy condition at this moment has to have solved because of braking force raising back slow problem of brake off time.
The present invention compared with prior art, can be along with the variation of axle load, automatically regulate braking pressure, the size that the makes braking force as far as possible adhesion condition between tire and ground adapts, with the stability that keeps automobile under various load, various deceleration situation, to brake, highly sensitive, excellent working performance, good stability.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is an A-A section-drawing embodiment illustrated in fig. 1;
Fig. 3 is a B-B section-drawing embodiment illustrated in fig. 1;
Fig. 4 is input of the present invention-output static characteristics scheme drawing.
Among the figure: 1, positioning seat 2, pressure spring seat 3, pressure spring 4, relief piston 5, check valve 6, spring 7, spring perch 8, upper valve body 9, control mouth 10, anti-vacuum way 11, two-diameter piston 12, valve 13, valve seat 14, valve spring 15, guide holder 16, admission port 17, inlet channel 18, dustproof sheet 19, inlet channel 20, gas off-take 21, binding post 22, solenoid electric valve 23, gas off-take 24, seal cartridge 25, dummy piston 26, balance spring 27, air flue 28, exhaust duct 29, air extractor duct 30, following valve body 31, dust boot 32, air flue 33, sensing element 34, load transducer 35, stop lamp switch 36, seal ring 37, power supply
The specific embodiment
In the embodiment shown in Fig. 1～3: comprise the valve body that constitutes by upper valve body 8, following valve body 30, the normally closed bi-bit bi-pass solenoid electric valve 22 and the load transducer 34 of captiveing joint with upper valve body 8, wherein the sensing element 33 of load transducer 34 adopts adjustable roller pivoted arm feeler lever, contact with suspension, the mouth of load transducer 34 connects the power end of solenoid electric valve 22 through the stop lamp switch 35 of master brake cylinder.The relief piston assembly is installed in the valve body from top to down successively, two-diameter piston 11 and valve assembly, wherein the relief piston assembly is installed in the upper valve body 8, comprise positioning seat 1, pressure spring seat 2, pressure spring 3, relief piston 4, check valve 5, spring 6 and spring perch 7, wherein the outer wall of positioning seat 1 and relief piston 4 all with the inner wall sealing of upper valve body 8, pressure spring seat 2 is installed in the below of positioning seat 1, pressure spring 3 is fitted between the upper surface of pressure spring seat 2 and relief piston 4, check valve 5 and spring perch 7 be installed in successively relief piston 4 below, spring 6 is fitted between the upper surface of the bottom of check valve 5 and spring perch 7, the upper surface of the lower surface of spring perch 7 and two-diameter piston 11 and upper valve body 8 constitute control chamber C, upper valve body 8 sidewalls are provided with inlet channel 17, gas off-take 23 and air flue 32, wherein inlet channel 17 is communicated with the inlet channel 19 of control mouth 9 and solenoid electric valve 22 respectively, gas off-take 23 is communicated with the gas off-take 20 and the control chamber C of solenoid electric valve 22 respectively, and air flue 32 is communicated with the lower surface of control chamber C and relief piston 4 respectively.Two-diameter piston 11 and valve assembly from up to down are installed in the following valve body 30 successively, wherein on two-diameter piston 11 and two sidewalls of following valve body 30 leak frees, be equipped with seal ring 36, two-diameter piston 11 is provided with anti-vacuum way 10 between two seals circle 36, one end of anti-vacuum way 10 is communicated in the vacuum chamber prevention E of two-diameter piston 11 and following valve body 30 formations, two-diameter piston 11 centers are provided with inner chamber, the inner chamber internal fixation is equipped with the dummy piston assembly, comprise seal cartridge 24, dummy piston 25 and balance spring 26, wherein seal cartridge 24 outer ancient piece of jade, round, flat and with a hole in its centres on, the lower end is equipped with the internal chamber wall sealing of seal ring 36 and two-diameter piston 11, and seal cartridge 24 is on being positioned at, be provided with air flue 27 between the following two seals circle 36, be communicated with the other end of anti-vacuum way 10, seal cartridge 24 bottoms have exhaust duct 28 and communicate with atmosphere through valve assembly, balance spring 26 is fitted in the seal cartridge 24, the upper end of balance spring 26 contacts at the lower surface of dummy piston 25, and the lower surface of two-diameter piston 11 constitutes output cavity D with following valve body 30 and valve assembly.Following valve body 30 is provided with admission port 16 and air extractor duct 29, wherein admission port 16 is communicated with the outer wall of valve assembly, air extractor duct 29 is communicated with output cavity D, valve assembly comprises valve 12, valve seat 13, valve spring 14 and guide holder 15, guide holder 15 sealings that wherein are set with valve spring 14 are installed in down in the valve body 30, valve 12 is contained on the guide holder 15 from the upper end sealing shroud, valve seat 13 is fitted on the valve 12 from the upper end sealing, and with 30 sealings of following valve body, the lower surface of admission port 16 communication valve gate seats 13, the bottom of following valve body 30 is provided with noise reduction dust boot 31 corresponding to the exhaust duct end of valve assembly.
Fig. 4 is input of the present invention---output static characteristics example plot, and wherein curve a is unloaded glancing impact input-output static characteristics example plot, curve b is heavily loaded glancing impact input-output static characteristics example plot.
Claims (6)
1, a kind of electric-controlled load sensing proportion valve, comprise by upper valve body (8), the valve body that following valve body (30) constitutes, solenoid electric valve (22) of captiveing joint and load transducer (34) with upper valve body (8), wherein descend two-diameter piston (11) and valve assembly from up to down are installed in the valve body (30) successively, two-diameter piston (11) holds the stepped sidewall between driving surface and the small end driving surface to constitute vacuum chamber prevention E with following valve body (30) sealing greatly, two-diameter piston (11) is positioned at greatly, have horizontal anti-vacuum way (10) between the small end driving surface and be communicated with vacuum chamber prevention E, the lower surface of two-diameter piston (11) constitutes output cavity D with following valve body (30) and valve assembly, following valve body (30) is provided with admission port (16) and air extractor duct (29), wherein admission port (16) is communicated with the outer wall of valve assembly, air extractor duct (29) is communicated with output cavity D, it is characterized in that: two-diameter piston (11) center is provided with inner chamber, the inner chamber internal fixation is equipped with the dummy piston assembly, the intracavity sidewall sealing of dummy piston assembly and two-diameter piston (11), the other end of anti-vacuum way (10) is communicated with the exhaust duct of valve assembly through the dummy piston assembly, solenoid electric valve (22) is a normally closed bi-bit bi-pass solenoid electric valve, in upper valve body (8), set up the relief piston assembly, comprise positioning seat (1), pressure spring seat (2), pressure spring (3), relief piston (4), check valve (5), spring (6) and spring perch (7), wherein the outer wall of positioning seat (1) and relief piston (4) all with the inner wall sealing of upper valve body (8), pressure spring seat (2) is installed in the below of positioning seat (1), pressure spring (3) is fitted between the upper surface of pressure spring seat (2) and relief piston (4), check valve (5) and spring perch (7) be installed in successively relief piston (4) below, spring (6) is fitted between the upper surface of the bottom of check valve (5) and spring perch (7), the upper surface of the lower surface of spring perch (7) and two-diameter piston (11) and upper valve body (8) constitute control chamber C, upper valve body (8) sidewall is provided with inlet channel (17), gas off-take (23) and air flue (32), wherein inlet channel (17) is communicated with the inlet channel (19) of control mouthful (9) and solenoid electric valve (22) respectively, gas off-take (23) is communicated with the gas off-take (20) and the control chamber C of solenoid electric valve (22) respectively, and air flue (32) is communicated with the lower surface of control chamber C and relief piston (4) respectively.
2, electric-controlled load sensing proportion valve as claimed in claim 1, it is characterized in that: the dummy piston assembly comprises seal cartridge (24), dummy piston (25) and balance spring (26), wherein the outer ancient piece of jade, round, flat and with a hole in its centre of seal cartridge (24) on, the lower end is equipped with the internal chamber wall sealing of seal ring (36) and two-diameter piston (11), and seal cartridge (24) is on being positioned at, be provided with the air flue (27) that is communicated with anti-vacuum way (10) between the following two seals circle (36), seal cartridge (24) bottom has exhaust duct (28) and communicates with atmosphere through valve assembly, balance spring (26) is fitted in the seal cartridge (24), and the upper end of balance spring (26) contacts at the lower surface of dummy piston (25).
3, electric-controlled load sensing proportion valve as claimed in claim 1, it is characterized in that: on two-diameter piston (11) and two sidewalls of following valve body (30) leak free, be equipped with seal ring (36), anti-vacuum way (10) is arranged on two-diameter piston (11) and is positioned between the two seals circle (36), and E is communicated with vacuum chamber prevention.
4, electric-controlled load sensing proportion valve as claimed in claim 1, it is characterized in that: valve assembly comprises valve (12), valve seat (13), valve spring (14), guide holder (15), guide holder (15) sealing that wherein is set with valve spring (14) is installed in down in the valve body (30), valve (12) is contained on the guide holder (15) from the upper end sealing shroud, valve seat (13) is fitted on the valve (12) from the upper end sealing, and with following valve body (30) sealing, the lower surface of admission port (16) communication valve gate seat (13).
5, electric-controlled load sensing proportion valve as claimed in claim 1, it is characterized in that: the sensing element (33) of load transducer (34) adopts adjustable roller pivoted arm feeler lever, contact with suspension, the mouth of load transducer (34) connects the power end of solenoid electric valve (22) through the stop lamp switch (35) of master brake cylinder.
6, electric-controlled load sensing proportion valve as claimed in claim 1 is characterized in that: the bottom of following valve body (30) is provided with noise reduction dust boot (31) corresponding to the exhaust duct end of valve assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100695398A CN100526129C (en) | 2006-10-23 | 2006-10-23 | Electric control load sensor proportion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100695398A CN100526129C (en) | 2006-10-23 | 2006-10-23 | Electric control load sensor proportion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101168366A CN101168366A (en) | 2008-04-30 |
| CN100526129C true CN100526129C (en) | 2009-08-12 |
Family
ID=39389169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100695398A Expired - Fee Related CN100526129C (en) | 2006-10-23 | 2006-10-23 | Electric control load sensor proportion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100526129C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348113B (en) * | 2008-06-28 | 2012-12-26 | 淄博龙达金山汽车部件有限公司 | Air brake ABS electric control load sensor anti-lock braking executive system |
| CN108944890B (en) * | 2018-09-07 | 2023-12-19 | 广州市西合汽车电子装备有限公司 | Electromagnetic flow relay valve |
| US10927968B2 (en) * | 2018-12-12 | 2021-02-23 | Bendix Commercial Vehicle Systems Llc | Pneumatic valve/pressure vessel plastic metal composite cover with bayonet retention feature |
| CN111422179A (en) * | 2020-05-18 | 2020-07-17 | 河北神安汽车部件科技有限公司 | Internal-adjusting automatic-transformation proportional brake valve and use method thereof |
-
2006
- 2006-10-23 CN CNB2006100695398A patent/CN100526129C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101168366A (en) | 2008-04-30 |
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Granted publication date: 20090812 Termination date: 20091123 |