Description:QUICK RELEASE VALVE FOR AIR BRAKE SYSTEM AND A METHOD THEREOF
FIELD OF THE INVENTION
The present invention relates to a quick release valve. More specifically, the present invention relates to a quick release valve for air brake system in heavy-duty applications which allows for the rapid release of air pressure when needed and quickly releasing the pressure in the braking system. Advantageously, the present invention provides a compact valve for faster response times and improves the overall safety of the braking mechanism.
BACKGROUND OF THE INVENTION
An air brake or, more formally, a compressed air brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle. Air brakes are used as an alternative to hydraulic brakes which are used on lighter vehicles. Hydraulic brakes use a liquid to transfer pressure from the brake pedal to the brake shoe to stop the vehicle. Air brakes are used in heavy commercial vehicles due to their reliability.
Air brakes are used in large heavy vehicles, particularly those having multiple trailers that must be linked into the brake system, such as trucks, buses, trailers, and semi-trailers in addition to their use in railroad trains. Air-powered brakes are the safest choice in large vehicles since hydraulic fluids can leak and cause accidents.
The main parts of an air brake system include an air compressor, reservoir, air dryer, safety valve, foot valve, brake chamber and brake assembly. A compressed-air-brake system is divided into a supply system and a control system. The supply system compresses, stores and supplies high-pressure air to the control system as well as to additional air operated auxiliary truck systems (gearbox shift control, clutch pedal air assistance servo, etc.). The air compressor draws filtered air from the atmosphere and compresses it, storing the compressed air in high-pressure reservoirs. The control system consists of service brakes, parking brakes, a control pedal, and an air storage tank. If the vehicle is towing a trailer, it often has a separate trailer-brake system that receives compressed air from the supply system.
Quick release valves were developed to speed up the release of air from the brake chambers to let the brakes release quicker. The quick release valve moves to reduce brake lag in the air brake system. The quick release valve quickly releases air from the service brake chambers into the atmosphere after a service brake application is released. Doing so will ensure proper timing when applying and releasing the brakes. It’s usually mounted on the vehicle axle, midway between the two brake chambers connected to it, so the exhausted air travels a short distance when it is expelled.
There are few prior arts available in the literature about the existence of various quick release valves.
CA2119074A1 discloses a simplified and less-costly quick-release valve with controlled hysteresis for a vehicle spring-set air-release parking brake system lengthens the operating life of the valve, reduces energy consumption, extends compressor life and alleviates noise problems. The valve comprises a valve body and a plurality of internal passageways each of which is selectively connectable to at least another of the passageways.
The selective connection is controlled by an integrally formed flexural spring-brake-control release diaphragm within the valve body and disposed to either isolate or selectively connect the passageways depending on the relative pressure conditions within the passageways and respective areas of the diaphragm exposed to the pressures. The components are designed so that the normal variations or cycling of the supply or intake pressurized air does not cause cycling of the pressure in the spring-brake chambers.
EP3380371B1 discloses a method for controlling a compressed air brake system (1) of a vehicle, comprising the following steps: in the case of driver braking (FB) by actuating a brake pedal, outputting a similar driver brake pressure via a brake pressure control line, an activation device to a brake circuit, set in a driver brake position (S4 = 0), comprising at least one ABS shut-off valve device, a brake line and a wheel brake (St4); in the case of there being an external brake request signal of a driver assistance system without simultaneous driver braking, switching the activation device into a functional position; conveying a system pressure to the ABS shut-off valve device; and modulating a similar brake pressure on the at least one brake line of the brake circuit with the at least one wheel brake by controlling the ABS shut-off valve device (St5), characterised in that when there is driver braking as well as an external brake request signal, the driver brake pressure is measured and a driver brake pressure value is determined, the driver brake pressure value and an external brake pressure value contained in the external brake request signal are added or superimposed to form a combined brake pressure value, and the activation device is switched into the functional position and the combined brake pressure value is modulated from the system pressure by controlling the ABS shut-off valve device (St6).
CN110803147A discloses an air brake system and its braking method and belongs to the technical field of vehicle brake. An air brake system comprises a brake valve, two first brake air chamber, which are respectively located at both sides of the vehicle, two second brake air chamber, which are respectively located at both sides of the vehicle, a first relay valve control is connected with the brake valve; ABS valve two are connected in parallel, are connected with the first relay valve is connected, and the first relay valve is located between the brake valve and the ABS valve, two of the ABS valve is respectively connected with two of the first brake air chamber for supplying said first brake gas chamber gas; two second relay valve, two of the second relay valve are connected in parallel, and respectively connected with the two of the ABS valve, two of the second relay valve are respectively connected with the two second brake air chamber, which is used to supply the second brake air chamber. The advantages are as follows: it can quickly at the same time to two first braking gas chamber and two second brake air chamber air.
Moreover, from the above cited literature it is clearly evident that the quick release valves available in the market currently develops leaks over time, which can lead to loss of air pressure in the brake system, has fixed release rate, requires regular maintenance to keep them in optimal working condition.
Accordingly, there is a need for an improved quick release valve which has efficient and reliable operation of air brake systems. By rapidly releasing the pressure in the braking system, it helps to ensure quick response times and enhances the effectiveness of the brakes in various automotive applications.
OBJECTIVE OF THE INVENTION
The principal objective of the present invention is to provide a quick release valve which allows for quicker release of the brakes.
Another objective of the present invention is to provide a quick release valve which ensures the proper functioning of the air brake system and reduces the risk of brake failure.
Another objective of the present invention is to provide a quick release valve which improves fuel efficiency by reducing air pressure in a timely manner and minimizes air leakage and unnecessary energy loss.
SUMMARY OF THE PRESENT INVENTION
It is a primary aspect of the present invention to provide a quick release valve for air brake system, comprising: a valve body (110) provided with a supply port (107) connected to the foot brake valve, one or more delivery ports (108a) connected to the spring-brake chambers, and an exhaust port (109), a diaphragm (101); a bottom cup (102); a bottom cover (103); a silencer mesh (104); one or more seal rings (105), and a circlip (106). The quick release valve (100) fixed at the front axle of the vehicle working under two different conditions: (i) when the foot brake valve is depressed, the air pressure from the foot brake valve flows into the supply ports (107) and deflects the diaphragm (101) downwardly it closes the exhaust port, and then the air pressure flows into the spring-brake chambers through delivery ports (108a, 108b), and (ii) when the foot brake valve is released, the supply port (107) is closed by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then the air pressure in the spring-brake chamber is released through the exhaust port (109).
Another aspect of the present invention is to provide a method of working of quick release valve for air brake system, said method comprises steps of:
a. when the foot brake valve is depressed, flowing the air pressure from the foot brake valve into the supply ports (107) and deflecting the diaphragm (101) downwardly it closes the exhaust port, and then flowing the air pressure into the spring-brake chambers through delivery ports (108a, 108b), and
b. when the foot brake valve is released, closing the supply port (107) by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then releasing the air pressure in the spring-brake chamber through the exhaust port (109).
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows a view of the construction of the quick release valve.
Figure 2 shows a view of the port details of the quick release valve.
Figure 3 shows a detailed view of the working of the quick release valve in the ON state.
Figure 4 shows a detailed view of working of the quick release valve in the OFF state.
Figure 5 shows a circuit diagram of quick release valve in ON state.
Figure 6 shows a circuit diagram of quick release valve in OFF state.
DETAILED DESCRIPTION OF THE INVENTION
The present invention as embodied by a “quick release valve for air brake system and method thereof” succinctly fulfills the above-mentioned need[s] in the art. The present invention has objective[s] arising because of the above-mentioned need[s], said objective[s] having been enumerated herein above.
The following description is directed to quick release valve for air brake system and method thereof as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation[s]/modification[s] applied to the structural alternative[s]/functional alternative[s] within its scope and purview. The present invention may be embodied in other specific form[s] without departing from the essential attributes thereof.
Furthermore, the terms and phrases used herein are not intended to be limiting, but rather are to provide an understandable description. Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
The conventional quick release valve develops leaks over time, which can lead to loss of air pressure in the brake system, has fixed release rate, requires regular maintenance to keep them in optimal working condition, and lacks additional features that enhance the overall performance and safety of the air brake system. But in the case of present invention, an improved quick release valve allows for quicker release of the brakes, ensures the proper functioning of the air brake system and reduces the risk of brake failure, and improves fuel efficiency by reducing air pressure in a timely manner, and minimizes air leakage and unnecessary energy loss.
Referring to Figure 1 to 6, in an embodiment of the present invention, provides an quick release valve of an air brake system comprising: a valve body (110) provided with a supply port (107) connected to the foot brake valve, one or more delivery ports (108a) connected to the spring-brake chambers, and an exhaust port (109), a diaphragm (101); a bottom cup (102); a bottom cover (103); a silencer mesh (104); one or more seal rings (105), a circlip (106), wherein the quick release valve (100) fixed at the front axle of the vehicle working under two different conditions: (i) when the foot brake valve is depressed, the air pressure from the foot brake valve flows into the supply ports (107) and deflects the diaphragm (101) downwardly it closes the exhaust port, and then the air pressure flows into the spring-brake chambers through delivery ports (108a, 108b), and (ii) when the foot brake valve is released, the supply port (107) is closed by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then the air pressure in the spring-brake chamber is released through the exhaust port (109).
In one embodiment of the present invention, the diaphragm (101) controls the flow of fluid between two delivery ports (108a, 108b).
In another embodiment of the present invention, the sealing rings (105) prevent air leaks between different components of the valve.
In another embodiment of the present invention, the silencer mesh (104) comprises a mesh screen that is placed inside the bottom cup (102) to reduce the noise and vibration produced by the release of compressed air in the air brake system.
In another embodiment of the present invention, the bottom cup (102) is fixed with the bottom cover (103) by using circlip (106).
Another embodiment of the present invention is to provide a method of working of quick release valve for air brake system as claimed in claim 1, said method comprises steps of:
a. when the foot brake valve is depressed, flowing the air pressure from the foot brake valve into the supply ports (107) and deflecting the diaphragm (101) downwardly it closes the exhaust port, and then flowing the air pressure into the spring-brake chambers through delivery ports (108a, 108b), and
b. when the foot brake valve is released, closing the supply port (107) by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then releasing the air pressure in the spring-brake chamber through the exhaust port (109).

WORKING EXAMPLE
An exemplary embodiment discloses an quick release valve of an air brake system comprising: a valve body (110) provided with a supply port (107) connected to the foot brake valve, one or more delivery ports (108a) connected to the spring-brake chambers, and an exhaust port (109), a diaphragm (101); a bottom cup (102); a bottom cover (103); a silencer mesh (104); one or more seal rings (105), and a circlip (106).

The quick release valve (100) fixed at the front axle of the vehicle working under two different conditions:

a. Quick release valve ON state:
when the foot brake valve is depressed, the air pressure from the foot brake valve flows into the supply ports (107) and deflects the diaphragm (101) downwardly it closes the exhaust port, and then the air pressure flows into the spring-brake chambers through delivery ports (108a, 108b), and

b. Quick release valve OFF state:
when the foot brake valve is released, the supply port (107) is closed by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then the air pressure in the spring-brake chamber is released through the exhaust port (109).

ADVANTAGE OF THE PRESENT INVENTION
The present invention relates to a quick release valve of an air brake system which provides efficient and reliable operation of air brake systems. By rapidly releasing the pressure in the braking system, it helps to ensure quick response times and enhances the effectiveness of the brakes in various automotive applications.
The present invention relates to a quick release valve which is simple and less complex compared to other types of valves used in air brake systems, thus makes easier to install and maintain.
The present invention relates to a quick release valve which is easy to operate and control, and their quick response time and reliable performance make them efficient in managing the air pressure in the brake system.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.

LIST OF NUMERALS:
(100). Quick release valve
(101). Diaphragm
(102). Bottom cup
(103). Bottom cover
(105). Seal rings
(106). Circlip
(107). Supply port
(108a, b). Delivery ports
(109). Exhaust port
(110). Valve body
, Claims:WE CLAIM:
1. A quick release valve (100) for air brake system, comprising:
a. a valve body (110) provided with a supply port (107) connected to the foot brake valve, one or more delivery ports (108a) connected to the spring-brake chambers, and an exhaust port (109),
b. a diaphragm (101);
c. a bottom cup (102);
d. a bottom cover (103);
e. a silencer mesh (104);
f. one or more seal rings (105), and
g. a circlip (106),
wherein the quick release valve (100) fixed at the front axle of the vehicle working under two different conditions: (i) when the foot brake valve is depressed, the air pressure from the foot brake valve flows into the supply ports (107) and deflects the diaphragm (101) downwardly it closes the exhaust port, and then the air pressure flows into the spring-brake chambers through delivery ports (108a, 108b), and (ii) when the foot brake valve is released, the supply port (107) is closed by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then the air pressure in the spring-brake chamber is released through the exhaust port (109).

2. The quick release valve (100) as claimed in claim 1, wherein the diaphragm (101) controls the flow of fluid between two delivery ports (108a, 108b).

3. The quick release valve (100) as claimed in claim 1, wherein the sealing rings (105) prevent air leaks between different components of the valve.

4. The quick release valve (100) as claimed in claim 1, wherein the silencer mesh (104) comprises a mesh screen that is placed inside the bottom cup (102) to reduce the noise and vibration produced by the release of compressed air in the air brake system.

5. The quick release valve (100) as claimed in claim 1, the bottom cup (102) is fixed with a bottom cover (103) by using the circlip (106).

6. A method of working of quick release valve for air brake system as claimed in claim 1, said method comprises steps of:
a. when the foot brake valve is depressed, flowing the air pressure from the foot brake valve into the supply ports (107) and deflecting the diaphragm (101) downwardly it closes the exhaust port, and then flowing the air pressure into the spring-brake chambers through delivery ports (108a, 108b), and
b. when the foot brake valve is released, closing the supply port (107) by pushing the diaphragm (101) upwards such that the exhaust port (109) is opened, and then releasing the air pressure in the spring-brake chamber through the exhaust port (109).

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Dated this 30th day of January 2024 Kalyanchand Jhabakh (IN/PA830)
Agent for applicant.