阅读说明：本技术 一种气制动系统及其制动方法 (Air braking system and braking method thereof ) 是由 郭冬妮 陈宇超 高枫 田博 刘明明 张军 曲健刚 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种气制动系统及其制动方法,属于车辆制动技术领域。一种气制动系统包括制动阀；两个第一制动气室,其分别位于所述车辆的两侧；两个第二制动气室,其分别位于所述车辆的两侧；第一继动阀,其与所述制动阀控制连接；两个并联连接的ABS阀,均与所述第一继动阀连接,且所述第一继动阀位于所述制动阀与所述ABS阀之间,两个所述ABS阀分别与两个所述第一制动气室连接,用于给所述第一制动气室供气；两个第二继动阀,两个所述第二继动阀并联连接,且分别与两个所述ABS阀控制连接,两个所述第二继动阀分别与两个所述第二制动气室连接,用于给所述第二制动气室供气。其优点在于：能够快速同时给两个第一制动气室和两个第二制动气室供气。(The invention discloses an air braking system and a braking method thereof, and belongs to the technical field of vehicle braking. An air brake system includes a brake valve; two first brake chambers respectively located at both sides of the vehicle; two second brake chambers respectively located at both sides of the vehicle; the first relay valve is in control connection with the brake valve; the two ABS valves are connected in parallel, are connected with the first relay valve, are positioned between the brake valve and the ABS valves, and are respectively connected with the two first brake air chambers and used for supplying air to the first brake air chambers; and the two second relay valves are connected in parallel and are respectively connected with the two ABS valves in a control manner, and the two second relay valves are respectively connected with the two second brake air chambers and are used for supplying air to the second brake air chambers. The advantages are that: the two first brake chambers and the two second brake chambers can be supplied with air rapidly and simultaneously.)

1. A pneumatic brake system for pneumatically braking a heavy vehicle, comprising:

a brake valve (2);

two first brake chambers (7), wherein the two first brake chambers (7) are respectively positioned at two sides of the vehicle;

two second brake chambers (6), wherein the two second brake chambers (6) are respectively positioned at two sides of the vehicle;

the first relay valve (3), the first relay valve (3) is in control connection with the brake valve (2);

the two ABS valves (5) are connected in parallel and are connected with the first relay valve (3), the first relay valve (3) is located between the brake valve (2) and the ABS valves (5), and the two ABS valves (5) are respectively connected with the two first brake air chambers (7) and used for supplying air to the first brake air chambers (7);

the two second relay valves (4) are connected in parallel and are respectively in control connection with the two ABS valves (5), and the two second relay valves (4) are respectively connected with the two second brake air chambers (6) and used for supplying air to the second brake air chambers (6).

2. A gas brake system according to claim 1, wherein the first gas outlet (22) on the brake valve (2) is connected to a first control port (32) on the first relay valve (3) to control the gas pressure at the gas outlet of the first relay valve (3).

3. A pneumatic brake system according to claim 1, wherein the outlet of the ABS valve (5) is connected to a second control port (42) on the second relay valve (4) to control the gas pressure at the outlet of the second relay valve (4).

4. A pneumatic brake system according to claim 1, wherein the outlet of the first relay valve (3) is connected to the inlet of both ABS valves (5).

5. The air brake system of claim 1, further comprising:

the brake valve (2) and the first relay valve (3) are respectively connected with the two air reservoirs (1), one air reservoir (1) is respectively connected with the brake valve (2) and the first relay valve (3) and used for providing an air source for the brake valve, and the other air reservoir (1) is respectively connected with the two second relay valves (4) and used for providing the air source for the brake valve (2) and the first relay valves.

6. A pneumatic brake system according to claim 5, wherein the outlet of one of the reservoirs (1) is connected to a first inlet port (21) on the brake valve (2) and a second inlet port (31) on the first relay valve (3), respectively.

7. A gas brake system according to claim 5, characterised in that the outlet of the other reservoir (1) is connected to the third inlet ports (41) of the two second relay valves (4), respectively.

8. A gas brake system according to claim 1, characterized in that the first brake chamber (7) is a rear axle brake chamber for controlling braking of the rear half of the vehicle.

9. A pneumatic brake system according to claim 1, wherein the second brake chamber (6) is a mid-axle brake chamber for controlling braking of the front half of the vehicle.

10. A method of braking a pneumatic brake system, comprising a pneumatic brake system as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of vehicle braking, in particular to an air braking system and a braking method thereof.

Background

The braking response time for a heavy vehicle employing pneumatic braking is the time that elapses from the start of the actuation of the braking system until the pressure in the worst braking chamber reaches 75% of its steady state value, and it is specified that the braking response time for the heavy vehicle to travel cannot exceed 0.6 s.

The pneumatic brake System adopted by the heavy vehicle means that air passes through two Anti-lock Braking System (ABS) valves from a brake valve to reach four brake air chambers, and pressure is built between the two brake air chambers on the same side of each ABS valve so as to achieve the Braking effect. The main function of the ABS is to prevent the wheel from losing direction due to locking, and when the wheel tends to lock, the ABS intervenes and starts to work.

However, the distance between the brake valve and the ABS valve is long, so that a pipeline for supplying air from the brake valve to the ABS valve is long, and the air charging is slow; and because the ABS valve is self-controlled, the inner diameter of the ABS valve is smaller, and the ABS valve can throttle, so that the time required for the gas to directly pass through one ABS valve and then respectively build pressure in two brake air chambers on the same side is longer, the response time of the whole brake system is longer, the timely braking of a vehicle is not facilitated, and safety accidents are easy to happen.

The existing solution is to add a double-relay valve structure in series between the brake valve and the ABS valve, which can effectively accelerate the speed of air from the brake valve to the ABS valve, but cannot effectively accelerate the speed of air outlet of the ABS valve due to self throttling of the ABS valve, so that the time required for one ABS valve to respectively build pressure in two brake air chambers on the same side is still longer, and the brake response time is longer.

In view of the above, it is desirable to provide a pneumatic brake system and a braking method thereof to solve the above problems.

Disclosure of Invention

One objective of the present invention is to provide an air brake system, which can realize fast inflation of two first brake air chambers and two second brake air chambers simultaneously, so that the braking response time is short and the braking is fast.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pneumatic brake system for pneumatically braking a heavy vehicle, comprising:

a brake valve;

the two first brake air chambers are respectively positioned at two sides of the vehicle;

the two second brake air chambers are respectively positioned at two sides of the vehicle;

the first relay valve is in control connection with the brake valve;

the two ABS valves are connected in parallel and are both connected with the first relay valve, the first relay valve is positioned between the brake valve and the ABS valves, and the two ABS valves are respectively connected with the two first brake air chambers and used for supplying air to the first brake air chambers;

and the two second relay valves are connected in parallel and are respectively connected with the two ABS valves in a control manner, and the two second relay valves are respectively connected with the two second brake air chambers and are used for supplying air to the second brake air chambers.

Preferably, the first gas outlet on the brake valve is connected with the first control port on the first relay valve to control the gas pressure at the gas outlet of the first relay valve.

Preferably, the gas outlet of the ABS valve is connected to a second control port on the second relay valve to control the gas pressure at the gas outlet of the second relay valve.

Preferably, the air outlet of the first relay valve is connected with the air inlets of the two ABS valves.

Preferably, the air brake system further comprises:

the two air reservoirs are connected in parallel, one air reservoir is respectively connected with the brake valve and the first relay valve and used for providing an air source for the brake valve and the first relay valve, and the other air reservoir is respectively connected with the two second relay valves and used for providing the air source for the second relay valves.

Preferably, an air outlet of one of the air reservoirs is connected to a first air inlet on the brake valve and a second air inlet on the first relay valve, respectively.

Preferably, the air outlet of the other air reservoir is respectively connected with the third air inlets of the two second relay valves.

Preferably, the first brake chamber is a rear axle brake chamber for controlling braking of a rear half of the vehicle.

Preferably, the second brake chamber is a mid-axle brake chamber for controlling braking of a front half of the vehicle.

Another objective of the present invention is to provide a braking method for an air brake system, wherein the air brake system can rapidly inflate two first brake chambers and two second brake chambers simultaneously, so that the braking response time is short and the braking is fast.

In order to achieve the purpose, the invention adopts the following technical scheme:

a braking method of a pneumatic braking system comprises the pneumatic braking system.

The invention has the beneficial effects that:

the invention provides a pneumatic braking system and a braking method thereof. In the air brake system, the first relay valve is arranged between the brake valve and the two ABS valves connected in parallel, so that the speed of air reaching the ABS valves from the brake valve is increased, the rapid inflation of the ABS valves is realized, and the brake response time is short; simultaneously, the two ABS valves are respectively connected with the two first brake air chambers and used for supplying air to the first brake air chambers; and the two second relay valves are respectively connected with the two second brake air chambers and used for supplying air to the second brake air chambers. The ABS valve only supplies air to the first brake chamber on the same side of the vehicle, so that the time required for the ABS valve to establish pressure in the first brake chamber is short, the problem that the air supply speed is low for the first brake chamber and the second brake chamber on the same side due to self throttling of the ABS valve is solved, the air can be quickly supplied to the two first brake chambers and the two second brake chambers respectively, the brake response time is further shortened, the vehicle can be braked in time, and safety accidents are prevented.

Drawings

FIG. 1 is a schematic structural diagram of an air brake system provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a brake valve provided in accordance with an embodiment of the present invention;

FIG. 3 is a schematic diagram of a first relay valve according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second relay valve according to an embodiment of the present invention;

fig. 5 is a schematic flow chart of a braking method of the pneumatic braking system according to the second embodiment of the invention.

Description of reference numerals:

in the figure:

1-a gas reservoir;

2-a brake valve; 21-a first air inlet; 22-a first air outlet;

3-a first relay valve; 31-a second air inlet; 32-a first control port;

4-a second relay valve; 41-third air inlet; 42-a second control port;

5-ABS valve; 6-a second brake chamber; 7-first brake chamber.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features. Like reference numerals refer to like elements throughout the specification.

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.