CN202368556U - Rear axle brake system of vehicle - Google Patents
Rear axle brake system of vehicle Download PDFInfo
- Publication number
- CN202368556U CN202368556U CN2011205233372U CN201120523337U CN202368556U CN 202368556 U CN202368556 U CN 202368556U CN 2011205233372 U CN2011205233372 U CN 2011205233372U CN 201120523337 U CN201120523337 U CN 201120523337U CN 202368556 U CN202368556 U CN 202368556U
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- Prior art keywords
- brake
- relay valve
- automatically controlled
- electrical control
- master cylinder
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Abstract
The utility model discloses a rear axle brake system of a vehicle. The rear axle brake system comprises a brake pedal, an electrical control brake master cylinder, a rear brake air reservoir, an electrical control relay valve, an electrical control unit and a spring brake air chamber, wherein the brake pedal, the electrical control brake master cylinder, the rear brake air reservoir, the electrical control relay valve, the electrical control unit and the spring brake air chamber are connected; the spring brake air chamber is divided into a left brake air chamber and a right brake air chamber which are communicated with a left air outlet and a right air outlet of the electrical control relay valve respectively; the electrical control brake master cylinder is connected with the electrical control relay valve through the electrical control unit to form an electrical control loop; and the opening of the left air inlet and the right air inlet of the electrical control relay valve is controlled in an electrical control mode respectively to form the rear axle air brake loop. According to the rear axle brake system of the vehicle, by adopting the electrical control brake master cylinder and the electrical control relay valve in the rear axle brake loop, the speed of opening the air inlet of the rear axle relay valve by the brake master cylinder is increased, the reaction time of the rear axle brake system is shortened, and synchronization with a front axle brake system is achieved, so that the safety of the vehicle brake system is improved.
Description
Technical field
The utility model relates to vehicle brake technology, and is especially relevant with the control of braking structure of vehicle rear axle.
Background technology
Usually the design of the trailing wheel brake servo circuit of vehicle; Because of the brake application by spring air chamber far away apart from master brake cylinder; Brake servo circuit all is that the use relay valve is connected between back braking air tank and master brake cylinder and brake application by spring air chamber after the institute; Utilize pressure reduction to open the admission port of relay valve,, reach the designing requirement that front and back wheel is braked simultaneously to improve the retro-speed of trailing wheel.
Along with the development of passenger vehicle technology, the kind of passenger vehicle and multiaxis passenger vehicle increases, and passenger vehicle length constantly increases; Back axle is apart from the also corresponding increasing of distance of master brake cylinder; Use relay valve to improve the also corresponding reduction of effect of trailing wheel retro-speed in the orthodox method,, be easy to generate the phenomenon of braking behind the backgear ratio front-wheel for the passenger vehicle of the above-mentioned type; Vehicle had and lost the danger that turns to this moment, caused the safety performance of vehicle to reduce.
The utility model content
The utility model provides a kind of vehicle rear axle brake system, is used to solve the back axle of the prior art vehicle far away apart from master brake cylinder, is easy to generate braking behind the backgear ratio front-wheel and the problem that causes the car brakeing safety to reduce.
The utility model discloses a kind of vehicle rear axle brake system, it is characterized in that, comprise brake pedal, electric control braking master cylinder, back braking air tank, automatically controlled relay valve, ECU and brake application by spring air chamber;
Said brake pedal, electric control braking master cylinder, back braking air tank, automatically controlled relay valve, ECU are connected with the brake application by spring air chamber;
Said brake application by spring air chamber is divided into left compressed air brake cylinder and right compressed air brake cylinder, and it communicates with the left and right air extractor duct of said automatically controlled relay valve respectively;
Said electric control master cylinder connects and composes electric control circuit through ECU and said automatically controlled relay valve, and controls opening of the left and right admission port of said automatically controlled relay valve respectively with automatically controlled mode, to constitute back axle compressed air brake loop.
This vehicle rear axle brake system; Also comprise: the NORM CLSD back axle is pressed valve fully; And said back axle presses valve and said ECU to connect and compose electric control circuit fully, and said ECU is opened said back axle with automatically controlled mode can't open said automatically controlled relay valve the time and pressed valve fully detecting;
Said brake pedal, electric control braking master cylinder, back braking air tank, back axle press valve, automatically controlled relay valve and brake application by spring air chamber to be connected fully, to constitute back axle cushion gas brake circuit.
The vehicle rear axle brake system of the utility model; Through in the back axle brake circuit, adopting electric control braking master cylinder and automatically controlled relay valve; Improved the speed of axle relay valve admission port after master brake cylinder is opened; Shortened the reaction time of back axle brake system, reached synchronous with the propons brake system, thus the safety that has improved motor vehicle braking system.
Description of drawings
Fig. 1 is the connection scheme drawing of existing back axle brake system;
Shown in Figure 2 is the connection scheme drawing of the back axle brake system of the utility model.
The specific embodiment
The exemplary embodiments that embodies the utility model characteristic and advantage will be described in detail in following explanation.Be understood that the utility model can have various variations on various embodiment, the scope of its neither disengaging the utility model, and explanation wherein and appended accompanying drawing be the usefulness of being used as explanation in itself, but not in order to restriction the utility model.
The utility model technical matters to be solved is: when the distance of back axle apart from master brake cylinder strengthens, how to improve the retro-speed of trailing wheel, to reach the designing requirement that front and back wheel should be braked simultaneously.
To this; The utility model provides a kind of vehicle rear axle brake system; Through in the back axle brake circuit, adopting electric control braking master cylinder and automatically controlled relay valve, open relay valve admission port speed to improve master brake cylinder, realize the back axle snap catch; Thereby avoided the trailing wheel retro-speed to be slower than the problem of front wheel brake speed, avoided because of the inconsistent safety problem that causes of front and back wheel brake response.
As shown in Figure 1, it arranges scheme drawing for traditional braking control, comprises brake application by spring air chamber 2, back braking air tank 3, master brake cylinder 4, relay valve 5 and connecting line.Wherein master brake cylinder 4 epicoeles insert back braking air tank 3.Its brake servo circuit principle of work is: when chaufeur is stepped on brake pedal 8; Gas is by back air tank 3-master brake cylinder 4 epicoeles-relay valve 5 signal ports; After opening relay valve 5 admission ports, gas is by air tank 3-relay valve 5-brake application by spring air chamber 2, and trailing wheel is braked.Behind loosen the brake, the gas in the brake application by spring air chamber 7 leads to atmosphere through relay valve 5 exhausr ports (not marking among the figure), the braking return.
On the basis of above-mentioned brake system; The structural representation of the back axle brake system of the utility model is as shown in Figure 2; Brake pedal 6, electric control braking master cylinder 4A, back braking air tank 3, automatically controlled relay valve 5A, brake application by spring air chamber 2, ECU (ECU, Electrical Control Unit) 7 and connecting line.Electric control braking master cylinder 4A also has electric control function except that having the pneumatic control circuit as common master brake cylinder.
Brake pedal as shown in Figure 26, electric control braking master cylinder 4A, back braking air tank 3, automatically controlled relay valve 5A are connected with brake application by spring air chamber 2; Brake application by spring air chamber 2 is divided into left compressed air brake cylinder and right compressed air brake cylinder, and it communicates with the left and right air extractor duct of automatically controlled relay valve respectively; Electric control master cylinder 4A connects and composes electric control circuit through ECU 7 with automatically controlled relay valve 5A; And control the opening and closing of the left and right admission port of automatically controlled relay valve 5A respectively with automatically controlled mode; During the air inlet open of automatically controlled relay valve 5A, just constituted back axle compressed air brake loop.
Above-mentioned back axle air braking system has improved the speed of back axle braking owing to adopted the mode of electric control, makes that the front and back bridge braking of vehicle can be synchronous.In addition, owing to added ECU 7 in the system, make electric control master cylinder 4A can control the left and right admission port of automatically controlled relay valve 5A respectively through ECU 7; Make electric control master cylinder 4A different braking pressures to be provided thus to the left and right compressed air brake cylinder of back axle; Regulate the size of back axle left and right sides braking force, as in the complicated bottom of condition of road surface, the ground-surface friction force of left and right wheels contact is different; Then, can realize better braking effect through left and right wheels is braked respectively.
The principle of work of its brake servo circuit is: when chaufeur is stepped on brake pedal 8; Electric control braking master cylinder 4A sends start signal to ECU 7; ECU 7 is the left and right air inlet open of automatically controlled relay valve 5A respectively; Gas gets into brake application by spring air chamber 2 then by the left and right admission port of the automatically controlled relay valve 5A of back air tank 3 entering, realizes the trailing wheel braking.Behind loosen the brake 8, the gas in the brake application by spring air chamber 2 leads to atmosphere through automatically controlled relay valve 5A exhausr port, the braking return.
In addition, for causing back axle brake failure, the back axle brake system of present embodiment, the electric control inefficacy that prevents electric control braking master cylinder 4A also comprises a cover cushion gas brake system.Referring to shown in Figure 2, this system comprises that also a NORM CLSD back axle presses valve 1 fully, loses efficacy when the electric control of electric control master cylinder 4A, and in the time of can't opening automatically controlled relay valve 5A, ECU 7 will be opened back axle and press valve 1 fully.At this moment, brake pedal 8, electric control braking master cylinder 4A, back braking air tank 3, back axle press valve 1, automatically controlled relay valve 5A to be connected with brake application by spring air chamber 2 fully, to constitute back axle cushion gas brake circuit.Gas is pressed the automatically controlled relay valve 5A of valve 1-signal port fully by back air tank 3-electric control braking master cylinder 4A epicoele-back axle; Thereby open the admission port of automatically controlled relay valve 5A; Gas in the back axle air tank 3 pours brake application by spring air chamber 2 through automatically controlled relay valve 5A then; The braking of realization trailing wheel, this moment, the gas control brake circuit played the effect of backup braking.
Further, the brake application by spring air chamber 2 in this case also can further be subdivided into left compressed air brake cylinder and right compressed air brake cylinder, and it communicates with the left and right sides air extractor duct of automatically controlled relay valve 5 respectively; And ECU 7 also is connected with the electromagnetic valve of the left and right sides admission port of automatically controlled relay valve 5A respectively; And control the opening and closing of said automatically controlled relay valve 5A left and right sides admission port respectively with automatically controlled mode; Can realize control respectively thus to back axle left and right sides trailing wheel; Help this back axle brake system is carried out expanded application, as left and right sides brake circuit is controlled respectively, through controlling the aperture of automatically controlled relay valve 5A left and right sides admission port; The size of scalable back axle left and right sides braking force helps braking The application of new technique such as anti-inclination, anti-sideslip, active safety feature.
The vehicle rear axle brake system of the utility model; Through in the back axle brake circuit, adopting electric control braking master cylinder and automatically controlled relay valve; Improved the speed of axle relay valve admission port after master brake cylinder is opened; Shortened the reaction time of back axle brake system, reached synchronous with the propons brake system, thus the safety that has improved motor vehicle braking system.Be particularly useful in passenger vehicle, articulated bus or the omnibus train etc., the back axle vehicle far away apart from master brake cylinder.
Those skilled in the art should recognize change and the retouching of under the situation of scope that does not break away from the appended the utility model that claim disclosed of the utility model and spirit, being done, and all belong within the protection domain of claim of the utility model.
Claims (2)
1. a vehicle rear axle brake system is characterized in that, comprises brake pedal, electric control braking master cylinder, back braking air tank, automatically controlled relay valve, ECU and brake application by spring air chamber;
Said brake pedal, electric control braking master cylinder, back braking air tank, automatically controlled relay valve, ECU are connected with the brake application by spring air chamber;
Said brake application by spring air chamber is divided into left compressed air brake cylinder and right compressed air brake cylinder, and it communicates with the left and right air extractor duct of said automatically controlled relay valve respectively;
Said electric control master cylinder connects and composes electric control circuit through ECU and said automatically controlled relay valve, and controls opening of the left and right admission port of said automatically controlled relay valve respectively with automatically controlled mode, to constitute back axle compressed air brake loop.
2. vehicle rear axle brake system according to claim 1; It is characterized in that; Also comprise: the NORM CLSD back axle is pressed valve fully; And said back axle presses valve and said ECU to connect and compose electric control circuit fully, and said ECU is opened said back axle with automatically controlled mode can't open said automatically controlled relay valve the time and pressed valve fully detecting;
Said brake pedal, electric control braking master cylinder, back braking air tank, back axle press valve, automatically controlled relay valve and brake application by spring air chamber to be connected fully, to constitute back axle cushion gas brake circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205233372U CN202368556U (en) | 2011-12-14 | 2011-12-14 | Rear axle brake system of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205233372U CN202368556U (en) | 2011-12-14 | 2011-12-14 | Rear axle brake system of vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202368556U true CN202368556U (en) | 2012-08-08 |
Family
ID=46592272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205233372U Expired - Fee Related CN202368556U (en) | 2011-12-14 | 2011-12-14 | Rear axle brake system of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202368556U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085443A (en) * | 2014-08-06 | 2014-10-08 | 徐工集团工程机械股份有限公司 | Engineering machine mechanical braking and steering system with preferentially steering front wheels |
| CN107054332A (en) * | 2017-06-09 | 2017-08-18 | 吉林大学 | A kind of air-pressure electric-control brakes and braking method with fail safe function |
-
2011
- 2011-12-14 CN CN2011205233372U patent/CN202368556U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104085443A (en) * | 2014-08-06 | 2014-10-08 | 徐工集团工程机械股份有限公司 | Engineering machine mechanical braking and steering system with preferentially steering front wheels |
| CN107054332A (en) * | 2017-06-09 | 2017-08-18 | 吉林大学 | A kind of air-pressure electric-control brakes and braking method with fail safe function |
| CN107054332B (en) * | 2017-06-09 | 2018-12-21 | 吉林大学 | A kind of air-pressure electric-control braking system and braking method with fail safe function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20171214 |