CN115923745A - Pneumatic service brake control system of commercial vehicle - Google Patents
Pneumatic service brake control system of commercial vehicle Download PDFInfo
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- CN115923745A CN115923745A CN202211608315.5A CN202211608315A CN115923745A CN 115923745 A CN115923745 A CN 115923745A CN 202211608315 A CN202211608315 A CN 202211608315A CN 115923745 A CN115923745 A CN 115923745A
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Abstract
The invention relates to a pneumatic service brake control system of a commercial vehicle, which comprises a foot brake valve, an ABS electromagnetic valve, a diaphragm cylinder, a relay valve, an ABS electromagnetic valve, a composite brake cylinder, a first air pipe, a second air pipe, a first air storage cylinder and a second air storage cylinder; this control system has increased a relay valve, adopts two relay valves, has shortened well rear axle braking response time, improves the security of vehicle, increases friction disc life. The 2 ports of the two relay valves are communicated, so that the air outlet of the two relay valves is integrated, the braking response time of the middle and rear axles is shortened, and the requirements that the middle and rear axles brake the same loop and the left and right wheels of a 4S/4M type ABS system are controlled are met.
Description
Technical Field
The invention belongs to the technical field of vehicle control, and particularly relates to a pneumatic service brake control system of a commercial vehicle.
Background
The common air pressure service brake control system only adopts a control mode of one service relay valve, the brake response time of a middle rear axle is long, the brake distance is long when the brake is implemented, and a brake drum/disc can not be released in time when the brake is cancelled, so that the friction plate is quickly abraded, and the use cost of a vehicle is increased.
Disclosure of Invention
The invention provides a pneumatic service brake control system for a commercial vehicle, which solves the defects of the prior art.
In order to solve the technical problem, the invention provides a pneumatic service brake control system of a commercial vehicle, which is characterized in that: the brake system comprises a foot brake valve 1, an ABS electromagnetic valve 2, a diaphragm cylinder 3, a relay valve 4, an ABS electromagnetic valve 5, a composite brake cylinder 6, a first air pipe 7, a second air pipe 8, a first air storage cylinder 9 and a second air storage cylinder 10; the air inlet of the upper cavity of the foot brake valve 1 is connected with the first air storage cylinder 9 through an air pipe, the air outlet of the upper cavity is respectively connected with the control ports of the two relay valves 4 through the air pipe, the air inlets of the two relay valves 4 are connected with the first air storage cylinder 9 through the air pipe, the air outlets of the relay valves 4 are connected in series through the air pipe, the air outlets are respectively connected with the air inlets of the two ABS electromagnetic valves two 5 through the air pipe after being connected in series, and the air outlet of each ABS electromagnetic valve two 5 is respectively connected with the two composite brake cylinders 6 on the same side through the air pipe; the air inlet of the lower cavity of the foot brake valve 1 is connected with the second air storage cylinder 10 through an air pipe, the air outlet of the lower cavity is respectively connected with the air inlets of the first two ABS electromagnetic valves 2 through the air pipe, and the air outlets of the first two ABS electromagnetic valves 2 are respectively connected with the diaphragm cylinder 3 through the air pipe.
Has the advantages that: the brake response time of the middle and rear axles can be effectively shortened, the brake distance is shortened, the safety of a vehicle is improved, and the service life of the friction plate is prolonged.
1. This control system has increased a relay valve, adopts two relay valves, has shortened well rear axle braking response time, improves the security of vehicle, increases friction disc life.
2. The 2 ports of the two relay valves are communicated, so that the air outlet of the two relay valves is integrated, the braking response time of the middle and rear axles is shortened, and the requirements that the middle and rear axles brake the same loop and the left and right wheels of a 4S/4M type ABS system are controlled are met.
Drawings
FIG. 1 shows a pneumatic service brake control system for a commercial vehicle according to the present invention.
The brake system comprises a foot brake valve 1, an ABS (anti-lock brake system) electromagnetic valve I2, a diaphragm cylinder 3, a relay valve 4, an ABS electromagnetic valve II 5, a composite brake cylinder 6, an air pipe 7, an air pipe 8, an air storage cylinder 9 and an air storage cylinder 10.
Detailed Description
In order to make the objects, contents and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention is provided.
As shown in fig. 1, the pneumatic service brake control system for a commercial vehicle provided by the invention comprises a foot brake valve 1, a first ABS solenoid valve 2, a diaphragm cylinder 3, a relay valve 4, a second ABS solenoid valve 5, a composite brake cylinder 6, a first air pipe 7, a second air pipe 8, a first air storage cylinder 9 and a second air storage cylinder 10;
the foot brake valve 1 is installed in a cab, a driver operates the foot brake valve, the two diaphragm cylinders 3 are respectively installed on corresponding front shafts of a vehicle, push rods of the diaphragm cylinders 3 are connected with wheel brake actuating mechanisms, the composite brake cylinder 6 is installed on corresponding middle and rear shafts of the vehicle, two are arranged on each side, and the push rods of the composite brake cylinder 6 are connected with the wheel brake actuating mechanisms;
the ABS electromagnetic valve I2, the relay valve 4, the ABS electromagnetic valve II 5, the air cylinder I9, the air cylinder II 10, the air pipe I7 and the air pipe II 8 are installed on a frame of a vehicle, wherein the ABS electromagnetic valve I2, the ABS electromagnetic valve II 5 and the relay valve 4 are symmetrically arranged along the center line of the frame.
An air inlet 11 port of an upper cavity of the foot brake valve 1 is connected with a first air storage cylinder 9 through an air pipe, an air outlet 21 port of the upper cavity is respectively connected with control ports 4 of two relay valves 4 through the air pipe, the air inlet 1 ports of the two relay valves 4 are connected with the first air storage cylinder 9 through the air pipe, air outlet 2 ports of the relay valves 4 are connected in series through the air pipe, the air outlet 2 ports are respectively connected with air inlet 1 ports of two ABS electromagnetic valves II 5 through the air pipe after being connected in series, and the air outlet 2 port of each ABS electromagnetic valve II 5 is respectively connected with two composite brake cylinders 6 on the same side through the air pipe; the air inlet 12 of the lower cavity of the foot brake valve 1 is connected with the second air storage cylinder 10 through an air pipe, the air outlet 22 of the lower cavity is respectively connected with the air inlets 1 of the two ABS electromagnetic valves I2 through air pipes, and the air outlets 2 of the two ABS electromagnetic valves I2 are respectively connected with the diaphragm cylinder 3 through air pipes.
The specific operation method comprises the following steps:
1, when braking, a driver steps on a pedal of the foot brake valve 1, openings 11 and 12 of the foot brake valve 1 are respectively communicated with openings 21 and 22, airflow in the air storage cylinder I9 flows out from the openings 11 and 12 of the foot brake valve 1 through the openings 21 and 22 to respectively reach openings 1 of the two ABS electromagnetic valves I2 and openings 4 of the two relay valves 4, airflow of the openings 1 of the two ABS electromagnetic valves I2 flows out through the openings 2 to reach the openings 11 of the diaphragm cylinders 3, air pressure is built in the diaphragm cylinders 3, the push rod action of the diaphragm cylinders 3 enables force to be applied to corresponding brake actuating mechanisms, and the front axle wheels of the vehicle are braked. Meanwhile, air flow is input into the ports 4 of the two relay valves 4, so that the ports 1 and 2 of the two relay valves 4 are communicated, the air flow in the air storage cylinder II 10 simultaneously reaches the ports 1 of the two ABS electromagnetic valves II 5 from the ports 1 of the two relay valves 4 through the ports 2, the air flow of the ports 1 of the two ABS electromagnetic valves II 5 flows out to the port 11 of the composite brake cylinder 6 through the ports 2, air pressure is quickly built in a diaphragm cavity of the composite brake cylinder 6, the push rod acts to enable force to act on a corresponding brake actuating mechanism, and rear axle wheels in the vehicle achieve braking.
2 when the brake is released, a driver releases the pedal of the foot brake valve 1, the ports 11 and 12 of the foot brake valve 1 are closed, the ports 21 and 22 are communicated with the port 3 (communicated with the atmosphere), so that air in the diaphragm cylinder 3 flows through the ABS electromagnetic valve I2, the port 21 of the foot brake valve 1 is communicated with the atmosphere, the push rod of the diaphragm cylinder 3 acts to remove the force, and the front axle wheel of the vehicle is released from the brake. Meanwhile, air pressure of 4 ports of the two relay valves 4 is communicated with the atmosphere through 22 ports of the foot brake valve 1, so that the port 1 of the relay valve 4 is closed, the ports 2 and 3 (communicated with the atmosphere) of the relay valve 4 are communicated, air in a diaphragm cavity of the composite brake cylinder 6 flows through the ABS second electromagnetic valve 5 and the relay valve 4 is communicated with the atmosphere, the push rod of the composite brake cylinder 6 acts to cancel force, and rear axle wheels in the vehicle are braked.
A comparison test of response times was performed for a vehicle equipped with the system and a vehicle equipped with a relay valve, and the following test data were obtained:
TABLE 1 statistical Table of the verification test
Experiments show that the installation of the pneumatic service brake control system for the commercial vehicle can shorten the response time of the service brake system by about 0.13 second, and if the initial speed of the vehicle is 60 kilometers per hour, the braking distance is shortened by about 2.16 meters, the safety of the vehicle is improved, and the service life of the friction plate is prolonged.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a commercial car pneumatic service braking control system which characterized in that: the brake system comprises a foot brake valve 1, an ABS electromagnetic valve 2, a diaphragm cylinder 3, a relay valve 4, an ABS electromagnetic valve 5, a composite brake cylinder 6, a first air pipe 7, a second air pipe 8, a first air storage cylinder 9 and a second air storage cylinder 10; the air inlet of an upper cavity of the foot brake valve 1 is connected with a first air storage cylinder 9 through an air pipe, the air outlet of the upper cavity is respectively connected with control ports of two relay valves 4 through air pipes, the air inlets of the two relay valves 4 are connected with the first air storage cylinder 9 through air pipes, the air outlets of the relay valves 4 are connected in series through air pipes, the air outlets are respectively connected with the air inlets of two ABS electromagnetic valves 5 through air pipes after being connected in series, and the air outlet of each ABS electromagnetic valve 5 is respectively connected with two composite brake cylinders 6 on the same side through air pipes; the air inlet of the lower cavity of the foot brake valve 1 is connected with the second air storage cylinder 10 through an air pipe, the air outlet of the lower cavity is respectively connected with the air inlets of the first two ABS electromagnetic valves 2 through air pipes, and the air outlets of the first two ABS electromagnetic valves 2 are respectively connected with the diaphragm cylinder 3 through air pipes.
2. A commercial vehicle pneumatic service brake control system as claimed in claim 1, wherein: the foot brake valve 1 is mounted in the cab.
3. A commercial vehicle pneumatic service brake control system as claimed in claim 1, wherein: the two diaphragm cylinders 3 are respectively installed on corresponding front shafts of the vehicle, push rods of the diaphragm cylinders 3 are connected with wheel brake actuating mechanisms, the composite brake cylinders 6 are installed on corresponding middle and rear shafts of the vehicle, two push rods are arranged on each side of each composite brake cylinder 6, and the push rods of the composite brake cylinders 6 are connected with the wheel brake actuating mechanisms.
4. A commercial vehicle pneumatic service brake control system as claimed in claim 1, wherein: the ABS electromagnetic valve I2, the relay valve 4, the ABS electromagnetic valve II 5, the air cylinder I9, the air cylinder II 10, the air pipe I7 and the air pipe II 8 are installed on a frame of a vehicle.
5. A commercial vehicle pneumatic service brake control system as claimed in claim 4, wherein: the ABS electromagnetic valve I2, the ABS electromagnetic valve II 5 and the relay valve 4 are symmetrically arranged along the center line of the frame.
6. The pneumatic service brake control system for commercial vehicle as claimed in claim 1, wherein: when braking, a driver steps on a pedal of the foot brake valve 1, the ports 11 and 12 of the foot brake valve 1 are respectively communicated with the ports 21 and 22 of the foot brake valve, airflow in the air storage cylinder I9 flows out from the ports 11 and 12 of the foot brake valve 1 through the ports 21 and 22 and respectively reaches the port 1 of the two ABS electromagnetic valves I2 and the port 4 of the two relay valves 4, the airflow of the port 1 of the two ABS electromagnetic valves I2 flows out to the port 11 of the diaphragm cylinder 3 through the port 2, air pressure is built in the diaphragm cylinder 3, the push rod of the diaphragm cylinder 3 acts to apply force to the corresponding brake actuating mechanism, and the front axle wheels of the vehicle realize braking; meanwhile, air flows are input into the ports 4 of the two relay valves 4, so that the ports 1 and 2 of the two relay valves 4 are communicated, the air flow in the air storage cylinder II 10 simultaneously reaches the ports 1 of the two ABS electromagnetic valves II 5 from the ports 1 of the two relay valves 4 through the ports 2, the air flow of the ports 1 of the two ABS electromagnetic valves II 5 flows out to the port 11 of the composite brake cylinder 6 through the ports 2, so that air pressure is quickly built in a diaphragm cavity of the composite brake cylinder 6, the push rod acts to apply force to a corresponding brake actuating mechanism, and rear axle wheels in a vehicle realize braking.
7. A commercial vehicle pneumatic service brake control system as claimed in claim 1, wherein: when braking is released, a pedal of the foot brake valve 1 is released, ports 11 and 12 of the foot brake valve 1 are closed, ports 21 and 22 are communicated with the atmosphere, so that air in the diaphragm cylinder 3 flows through the ABS electromagnetic valve I2, the port 21 of the foot brake valve 1 is communicated with the atmosphere, the push rod of the diaphragm cylinder 3 acts to cancel force, and the front axle wheel of the vehicle is released from braking; meanwhile, air pressure of 4 ports of the two relay valves 4 is communicated with the atmosphere through 22 ports of the foot brake valve 1, so that the port 1 of the relay valve 4 is closed, the port 2 of the relay valve 4 is communicated with the atmosphere, air in a diaphragm cavity of the composite brake cylinder 6 flows through the ABS second electromagnetic valve 5 and the relay valve 4 to be communicated with the atmosphere, the push rod of the composite brake cylinder 6 acts to remove force, and rear axle wheels in the vehicle are braked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211608315.5A CN115923745A (en) | 2022-12-14 | 2022-12-14 | Pneumatic service brake control system of commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211608315.5A CN115923745A (en) | 2022-12-14 | 2022-12-14 | Pneumatic service brake control system of commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115923745A true CN115923745A (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211608315.5A Pending CN115923745A (en) | 2022-12-14 | 2022-12-14 | Pneumatic service brake control system of commercial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115923745A (en) |
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2022
- 2022-12-14 CN CN202211608315.5A patent/CN115923745A/en active Pending
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