CN110371095B - Service braking system and vehicle - Google Patents
Service braking system and vehicle Download PDFInfo
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- CN110371095B CN110371095B CN201910667807.3A CN201910667807A CN110371095B CN 110371095 B CN110371095 B CN 110371095B CN 201910667807 A CN201910667807 A CN 201910667807A CN 110371095 B CN110371095 B CN 110371095B
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- air
- brake
- electromagnetic relay
- valve
- chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/06—Applications or arrangements of reservoirs
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The embodiment of the invention discloses a service braking system and a vehicle, wherein the service braking system comprises: the brake system comprises an air tank, a brake valve, two electromagnetic relay valves and a brake air chamber; the air storage cylinder is respectively connected with an air inlet of the brake valve and air inlets of the two electromagnetic relay valves through air paths and used for providing an air source; the air outlet of the brake valve is respectively connected with the control ports of the two electromagnetic relay valves through air passages; the air outlets of the two electromagnetic relay valves are respectively connected with the brake air chambers on the same side through air paths and used for supplying air to the brake air chambers. The service braking system provided by the embodiment of the invention can accelerate the response time, reduce the number of parts, greatly reduce the cost and greatly improve the assembly manufacturability.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle braking, in particular to a service braking system and a vehicle.
Background
The brake response time when the vehicle is pneumatically braked means the time which elapses from the start of the actuation of the control device of the brake system to the moment when the worst brake chamber pressure reaches 75% of its steady-state maximum pressure value, when the actuation time is 0.2S. The structure, the performance and the test method of the automobile brake system and the technical conditions of the running safety of the motor vehicle stipulate that the running brake response time of the heavy truck should not exceed 0.6 s. The running conditions of a plurality of domestic heavy trucks are severe, and the requirement on the brake response time is more severe.
At present, one technical scheme of a service brake system of a heavy truck is as follows: the air storage cylinder can provide an air source for the brake valve and the relay valve, a driver treads a brake pedal to control the opening degree of the brake valve so as to control the air pressure of an air outlet of the brake valve, the air outlet of the brake valve is connected to a control port of the relay valve so as to adjust the pressure of the air outlet of the relay valve, and the air outlet of the relay valve is connected to two air chambers of a middle and rear axle at the same side through a left anti-lock electromagnetic valve and a. Referring to FIG. 1, FIG. 1 is a schematic view of a prior art service brake system. However, the technical scheme has the defects that on one hand, air of an air source needs to pass through a left anti-lock electromagnetic valve and a right anti-lock electromagnetic valve after passing through a relay valve, and then simultaneously supplies air to a middle right brake chamber, a middle left brake chamber, a back right brake chamber and a back left brake chamber, and the response time of the whole system is delayed due to the fact that too many brake chambers enter the air through a single relay valve; on the other hand, the anti-lock solenoid valve receives signals of an anti-lock control unit and adjusts air pressure to achieve an anti-lock function, the self characteristics of the anti-lock solenoid valve determine that throttling exists in the aperture of the air passage, and further the time for the air to build pressure in the brake air chamber is long and the response is slow.
Another technical scheme of the service braking system can adopt a double-relay valve series connection scheme. According to the technical scheme, on the basis of the previous technical scheme, the two relay valves are directly controlled through the brake valve, and are respectively connected with the left anti-lock electromagnetic valve and the right anti-lock electromagnetic valve so as to be respectively connected with the brake air chambers on the same side of the middle-rear axle. Compared with the prior art, although the scheme can accelerate the response time to a certain extent, the problem that the response time is slowed down due to the self characteristics of the anti-lock solenoid valve cannot be avoided because the anti-lock solenoid valve supplies air to the two brake air chambers; meanwhile, the number of key parts of the system is increased, so that the system cost is greatly increased.
Compared with most of the conventional braking systems, the system realizes quick inflation of the air chamber of the middle rear axle, improves the problems of long response time and slow braking of the conventional braking system, and greatly shortens the braking response time. However, the solution also has the problem of adding critical parts, which still causes the problems of increased cost, complicated connecting pipelines and difficult assembly process.
Disclosure of Invention
The embodiment of the invention provides a service braking system and a vehicle, which can reduce the cost on the basis of accelerating the response time.
In a first aspect, an embodiment of the present invention provides a service braking system, including: the brake system comprises an air tank, a brake valve, two electromagnetic relay valves, a brake air chamber and an anti-lock control unit;
the two electromagnetic relay valves are respectively a rear right electromagnetic relay valve and a rear left electromagnetic relay valve;
the air storage cylinder is respectively connected with the air inlet of the brake valve and the air inlets of the two electromagnetic relay valves through air paths and is used for providing an air source;
the air outlet of the brake valve is respectively connected with the control ports of the two electromagnetic relay valves through air passages;
the air outlets of the two electromagnetic relay valves are respectively connected with the brake air chambers on the same side through air passages and used for supplying air to the brake air chambers;
and the anti-lock control unit is respectively electrically connected with the two electromagnetic relay valves and is used for realizing anti-lock through anti-lock control signals.
Furthermore, the brake chambers comprise two middle axle brake chambers and two rear axle brake chambers, wherein the two middle axle brake chambers are respectively a middle right brake chamber and a middle left brake chamber, and the two rear axle brake chambers are respectively a rear right brake chamber and a rear left brake chamber.
Furthermore, the air outlet of the rear right electromagnetic relay valve is respectively connected with the middle right brake air chamber and the rear right brake air chamber through air passages, and the air outlet of the rear left electromagnetic relay valve is respectively connected with the middle left brake air chamber and the rear left brake air chamber through air passages.
Further, the electromagnetic relay valve includes a control port, an air inlet and an air outlet.
Further, the brake valve is used for controlling the gas pressure of the gas outlets of the two electromagnetic relay valves.
In a second aspect, the embodiment of the present invention further provides a vehicle, and the vehicle is provided with the service braking system as described above.
According to the technical scheme provided by the embodiment of the invention, the outlet pressure of the two electromagnetic relay valves is controlled through the brake valve, so that the two electromagnetic relay valves supply air to the brake air chamber on the same side. Compared with the prior art, the embodiment of the invention adopts the electromagnetic relay valve, realizes the quick inflation of each brake chamber, can accelerate the response time, shorten the braking distance, effectively improve the braking performance while meeting the regulations, and meet the requirements of various working conditions on the braking response time.
Drawings
FIG. 1 is a schematic diagram of a prior art service brake system;
FIG. 2 is a schematic structural diagram of a service braking system according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a rear right electromagnetic relay valve according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a rear left electromagnetic relay valve according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a brake valve according to a first embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 2 is a schematic structural diagram of a service braking system according to a first embodiment of the present invention. As shown in fig. 2, the service brake system includes an air tank 28, a brake valve 21, two electromagnetic relay valves, and a brake chamber;
wherein, the air reservoir 28 is respectively connected with the air inlet of the brake valve 21 and the air inlets of the two electromagnetic relay valves through air paths and is used for providing an air source;
the air outlet of the brake valve 21 is respectively connected with the control ports of the two electromagnetic relay valves through air passages;
the air outlets of the two electromagnetic relay valves are respectively connected with the brake air chambers on the same side through air paths and used for supplying air to the brake air chambers.
As shown in fig. 2, the solid line may represent an air path, the dot-dash line may represent an electric circuit, and in the drawing, an intersection point exists between two lines to represent communication, and an intersection point does not exist to represent non-communication.
Fig. 1 is a schematic view showing the construction of a prior art service brake system, which may include an air cartridge 10, a brake valve 11, a relay valve 12, a rear right anti-lock solenoid valve 13, a rear left anti-lock solenoid valve 14, a middle right brake chamber 15, a middle left brake chamber 16, a rear right brake chamber 17, a right left brake chamber 18, and an anti-lock control unit 19. The air reservoir 10 provides air sources for the brake valve 11 and the relay valve 12, a driver controls the opening degree of the valve of the brake valve 11 by stepping on a brake pedal so as to control the air pressure of the air outlet of the brake valve 11, and the air outlet of the brake valve 11 is connected to the control port of the relay valve 12 so as to adjust the air outlet pressure of the relay valve 12; the outlet of the relay valve 12 is connected to a middle right brake air chamber 15, a middle left brake air chamber 16, a rear right brake air chamber 17 and a right left brake air chamber 18 through a rear right anti-lock electromagnetic valve 13 and a rear left anti-lock electromagnetic valve 14.
In a service braking system in the prior art, each anti-lock electromagnetic valve needs to supply air to two brake air chambers on the same side, and too much air enters the brake air chambers through a single relay valve, so that the response time of the whole braking system is delayed.
The relay valve used in this embodiment is an electromagnetic relay valve, and is different in principle and structure from the anti-lock electromagnetic valve shown in fig. 1, although it can achieve an anti-lock function. The electromagnetic relay valve is adopted in the embodiment, so that the problem that throttling is caused when gas enters the single electromagnetic relay valve to supply gas to the two brake air chambers does not exist, and the response time is greatly prolonged.
Further, referring to fig. 2, the two electromagnetic relay valves are a rear right electromagnetic relay valve 22 and a rear left electromagnetic relay valve 23, respectively.
As shown in fig. 2, the brake chambers include two middle axle brake chambers, namely a middle right brake chamber 24 and a middle left brake chamber 25, and two rear axle brake chambers, namely a rear right brake chamber 26 and a rear left brake chamber 27.
Further, the electromagnetic relay valve may include a control port, an air inlet port and an air outlet port. The positions of the control port, the air inlet and the air outlet are not limited in this embodiment, for example, the air inlet and the control port may be located on one side of the electromagnetic relay valve, and the air outlet may be located on the other side of the electromagnetic relay valve.
Fig. 3 is a schematic structural diagram of a rear right electromagnetic relay valve in the first embodiment of the present invention, and fig. 4 is a schematic structural diagram of a rear left electromagnetic relay valve in the first embodiment of the present invention. Referring to fig. 3 and 4, the rear right electromagnetic relay valve 22 includes an air inlet 221, a control port 223, and an air outlet 222 therein, and the rear left electromagnetic relay valve 23 includes an air inlet 231, a control port 233, and an air outlet 232 therein.
Fig. 5 is a schematic structural diagram of a brake valve according to a first embodiment of the present invention, in which the brake valve 21 may include an air outlet 211 and an air inlet 212.
Further, the air outlet 222 of the rear right electromagnetic relay valve 22 is respectively connected with the middle right brake air chamber 24 and the rear right brake air chamber 26 through air passages, and the air outlet 232 of the rear left electromagnetic relay valve 23 is respectively connected with the middle left brake air chamber 25 and the rear left brake air chamber 27 through air passages, so as to realize rapid inflation of the brake air chambers.
Further, the air reservoir 28 is respectively connected with the air inlet 212 of the brake valve 21, the air inlet 221 of the rear right electromagnetic relay valve 22 and the air inlet 231 of the rear left electromagnetic relay valve 23 to provide air sources for the brake valve; the air outlet 211 of the brake valve 21 is connected with the control port 223 of the rear right electromagnetic relay valve 22 and the control port 233 of the rear left electromagnetic relay valve 23, and is used for controlling the air pressure of the air outlets of the two electromagnetic relay valves so as to realize the control of the brake valve 21 on the whole service brake.
Further, the service brake system further comprises an anti-lock control unit 29, wherein the anti-lock control unit 29 is electrically connected with the two electromagnetic relay valves respectively and is used for realizing anti-lock through anti-lock control signals.
In this embodiment, after the air reservoir 28 provides air sources for the brake valve 21, the rear right electromagnetic relay valve 22 and the rear left electromagnetic relay valve 23, the air is supplied from the air outlet 211 of the brake valve 21 to the control port 223 of the rear right electromagnetic relay valve 22 and the control port 233 of the rear left electromagnetic relay valve 23, and the air pressure at the air outlet of the electromagnetic relay valves is controlled; the rear right electromagnetic relay valve 22 and the rear left electromagnetic relay valve 23 respectively supply air to the middle brake chamber and the rear brake chamber on the same side, so that air pressure can be quickly established.
The driver steps on the brake pedal to control the pressure of the air outlet of the brake valve 21, and the air outlet of the brake valve 21 is connected with the control ports of the rear right electromagnetic relay valve 22 and the rear left electromagnetic relay valve 23, so that the air pressures are consistent. The single electromagnetic relay valve only supplies air to the two brake air chambers on the same side, so that the load of the electromagnetic relay valve is reduced, the pressure of the brake air chambers is built more quickly, and the response time is shortened.
On the basis of the above embodiment, the embodiment of the invention further provides a vehicle, which is provided with the service braking system as described above to realize service braking of the vehicle.
According to the technical scheme provided by the embodiment of the invention, the outlet pressure of the two electromagnetic relay valves is controlled through the brake valve, so that the two electromagnetic relay valves supply air to the brake air chamber on the same side. Compared with the prior art, the embodiment of the invention adopts the electromagnetic relay valve, realizes the quick inflation of each brake chamber, can realize the acceleration of the response time, shortens the braking distance, effectively improves the braking performance while meeting the regulations, meets the requirements of various working conditions on the braking response time, reduces the number of system parts, greatly reduces the cost and greatly improves the assembly manufacturability.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. A service braking system, comprising: the brake system comprises an air tank, a brake valve, two electromagnetic relay valves, a brake air chamber and an anti-lock control unit;
the two electromagnetic relay valves are respectively a rear right electromagnetic relay valve and a rear left electromagnetic relay valve;
the air storage cylinder is respectively connected with the air inlet of the brake valve and the air inlets of the two electromagnetic relay valves through air paths and is used for providing an air source;
the air outlet of the brake valve is respectively connected with the control ports of the two electromagnetic relay valves through air passages;
the air outlets of the two electromagnetic relay valves are respectively connected with the brake air chambers on the same side through air passages and used for supplying air to the brake air chambers;
and the anti-lock control unit is respectively electrically connected with the two electromagnetic relay valves and is used for realizing anti-lock through anti-lock control signals.
2. A service braking system according to claim 1 wherein the brake chambers include two mid-axle brake chambers and two rear-axle brake chambers, wherein the two mid-axle brake chambers are respectively a mid-right brake chamber and a mid-left brake chamber and the two rear-axle brake chambers are respectively a rear-right brake chamber and a rear-left brake chamber.
3. A service braking system according to claim 2, wherein the air outlet of the rear right electromagnetic relay valve is connected with the middle right brake air chamber and the rear right brake air chamber through air passages respectively, and the air outlet of the rear left electromagnetic relay valve is connected with the middle left brake air chamber and the rear left brake air chamber through air passages respectively.
4. A service braking system according to claim 1 wherein the electromagnetic relay valve includes a control port, an air inlet port and an air outlet port.
5. A service braking system according to claim 1 wherein the brake valve is adapted to control the gas pressure at the outlet of both of the electromagnetic relay valves.
6. A vehicle, characterized in that it is provided with a service braking system according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910667807.3A CN110371095B (en) | 2019-07-23 | 2019-07-23 | Service braking system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910667807.3A CN110371095B (en) | 2019-07-23 | 2019-07-23 | Service braking system and vehicle |
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| Publication Number | Publication Date |
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| CN110371095A CN110371095A (en) | 2019-10-25 |
| CN110371095B true CN110371095B (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910667807.3A Active CN110371095B (en) | 2019-07-23 | 2019-07-23 | Service braking system and vehicle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803147A (en) * | 2019-11-27 | 2020-02-18 | 一汽解放汽车有限公司 | Air braking system and braking method thereof |
| CN112277908A (en) * | 2020-10-30 | 2021-01-29 | 湖北航天技术研究院特种车辆技术中心 | Vehicle braking system, vehicle braking method based on vehicle braking system and storage medium |
| CN114802146B (en) * | 2022-05-25 | 2023-11-03 | 中国重汽集团济南动力有限公司 | Rear axle driving double-loop control braking system and vehicle |
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| JP2002211370A (en) * | 2001-01-19 | 2002-07-31 | Nippon Sharyo Seizo Kaisha Ltd | Erroneous start prevention system of trailer |
| KR20080032571A (en) * | 2006-10-10 | 2008-04-15 | 현대자동차주식회사 | Air brake system for commercial vehicle |
| CN202171529U (en) * | 2011-08-02 | 2012-03-21 | 广州市西合汽车电子装备有限公司 | Dynamic performance test system for integrated mediator |
| CN103481882A (en) * | 2013-10-14 | 2014-01-01 | 徐州重型机械有限公司 | Service braking system of four-axle chassis and crane with same |
| JP2015124824A (en) * | 2013-12-26 | 2015-07-06 | ダイハツ工業株式会社 | Hydraulic control device of automatic transmission |
| CN105329229A (en) * | 2015-11-25 | 2016-02-17 | 北汽福田汽车股份有限公司 | Car and braking system of car |
| CN107128296A (en) * | 2017-05-10 | 2017-09-05 | 安徽江淮汽车集团股份有限公司 | It is pneumatic to use automatically controlled relay valve |
-
2019
- 2019-07-23 CN CN201910667807.3A patent/CN110371095B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002211370A (en) * | 2001-01-19 | 2002-07-31 | Nippon Sharyo Seizo Kaisha Ltd | Erroneous start prevention system of trailer |
| KR20080032571A (en) * | 2006-10-10 | 2008-04-15 | 현대자동차주식회사 | Air brake system for commercial vehicle |
| CN202171529U (en) * | 2011-08-02 | 2012-03-21 | 广州市西合汽车电子装备有限公司 | Dynamic performance test system for integrated mediator |
| CN103481882A (en) * | 2013-10-14 | 2014-01-01 | 徐州重型机械有限公司 | Service braking system of four-axle chassis and crane with same |
| JP2015124824A (en) * | 2013-12-26 | 2015-07-06 | ダイハツ工業株式会社 | Hydraulic control device of automatic transmission |
| CN105329229A (en) * | 2015-11-25 | 2016-02-17 | 北汽福田汽车股份有限公司 | Car and braking system of car |
| CN107128296A (en) * | 2017-05-10 | 2017-09-05 | 安徽江淮汽车集团股份有限公司 | It is pneumatic to use automatically controlled relay valve |
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| CN110371095A (en) | 2019-10-25 |
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