Claims:WE CLAIM:
1. A brake fail-safe valve assembly (100) comprising:
a. a pimary circuit connected to front brake callipers and rear brake callipers;
b. a secondary circuit connected to front brake callipers; and
c. said assembly (100) configured such that in the event of failure of primary circuit pressure from said secondary circuit is diverted to front brake callipers via said assembly (100), and in the event of failure of secondary circuit pressure from said primary circuit is diverted to said front brake callipers and said rear brake callipers to apply decelerating force to a vehicle.
2. The assembly (100) as claimed in claim 1, wherein said assembly (100) includes:
a. a first chamber (102) having a first inlet port (106) in fluid communication with said primary circuit, a second inlet port (115) in fluid communication with said secondary circuit and a first outlet port (110A) in fluid communication with said front brake callipers and said rear brake callipers; and
b. a second chamber (104) having a third inlet port (108) in fluid communication with said secondary circuit, a fourth inlet port (116) in fluid communication with said primary circuit and a second outlet port (110B) in fluid communication with said front brake callipers.
3. The assembly (100) as claimed in claim 1, wherein a spring loaded piston arrangement (112) is disposed within each of said first chamber (102) and said second chamber (104).
4. The assembly (100) as claimed in claim 2, wherein a stopper (114) is fixed within each of said first chamber (102) and said second chamber (104), said stopper (114) is configured to restrict upward movement of said spring loaded piston arrangement (112) in said first chamber (102) and restrict downward movement of spring loaded piston arrangement (112) in said second chamber (104).
5. The assembly (100) as claimed in claim 1, wherein a primary fluid line is in fluid communication with said primary circuit and is configured to pressurize said fluid via said assembly (100) to activate said front brake callipers and said rear brake callipers during failure of a secondary circuit.
6. The assembly (100) as claimed in claim 1, wherein a secondary fluid line is in fluid communication with said secondary circuit and is configured to pressurize said fluid via said assembly (100) to activate said front brake callipers during failure of said primary circuit.
7. The assembly (100) as claimed in claim 1, wherein said assembly (100) is arranged proximal to front wheels of said vehicle.
, Description:

FIELD
The present disclosure relates to the field of fail-safe valve for vehicle braking system.
DEFINITIONS
As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise.
The expression “Brake Caliper” used hereinafter in this specification refers to, but is not limited to, as brakes that forces the brake pads against the wheel rim.
These definitions are in addition to those expressed in the art.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Typically, braking circuit is considered to be a very important function as the complete safety of the occupants depends on the effective braking of the vehicle. There are certain circumstances when the braking circuit may fail and which may prove to be dangerous. There are essentially two braking circuits namely a primary and a secondary circuit. Fail of the primary circuit means primary fail braking of the front wheels fail & rear wheels braking in active condition). Secondary circuit fail means the front wheel braking is active but the rear wheel braking fails. Both the scenario poses serious concern as the vehicle stability may shift which ends up in a panic situation.
There is, therefore, felt a need of a fail-safe valve assembly that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide a brake fail-safe valve assembly.
Another object of the present disclosure is to provide a brake fail-safe valve assembly that has improved braking performance in brake circuit fail condition.
Yet another object of the present disclosure is to provide a brake fail-safe valve assembly which mitigates concern of pulling of vehicle upon application of brakes.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a brake fail-safe valve assembly. The brake fail safe valve assembly comprises a primary circuit and a secondary circuit. The primary circuit is connected to front brake callipers and rear brake calipers. The secondary circuit is connected to front brake calipers. The assembly is configured such that in the event of failure of primary circuit, the pressure from the secondary circuit is diverted to front brake calipers via the assembly, and in the event of failure of secondary circuit, the pressure from the primary circuit is diverted to the front brake calipers and the rear brake calipers to apply decelerating force to a vehicle.
In an embodiment, the assembly includes a first chamber and a second chamber. The first chamber is having a first inlet port in fluid communication with the primary circuit, a second inlet port in fluid communication with the secondary circuit and a first outlet port in fluid communication with the front brake calipers and the rear brake calipers. The second chamber is having a third inlet port in fluid communication with the secondary circuit, a fourth inlet port in fluid communication with the primary circuit and a second outlet port in fluid communication with the front brake calipers.
In an embodiment, a spring loaded piston arrangement is disposed within each of the first chamber and the second chamber.
In an embodiment, a stopper is fixed within each of the first chamber and the second chamber. The stopper is configured to restrict upward movement of the spring loaded piston arrangement in the first chamber. The stopper is configured to restrict downward movement of spring loaded piston arrangement in the second chamber.
In an embodiment, a primary fluid line is in fluid communication with the primary circuit and is configured to pressurize the fluid via the assembly to activate the front brake calipers and the rear brake calipers during failure of the secondary circuit.
In an embodiment, a secondary fluid line is in fluid communication with the secondary circuit and is configured to pressurize the fluid via the assembly to activate the front brake calipers during failure of the primary circuit.
In an embodiment, the assembly is arranged proximal to front wheels of the vehicle.
BRIEF DESCRIPTION OF ACCOMPANYING DRAWING
The brake fail-safe valve assembly of the present disclosure will now be described with the help of the accompanying drawing, in which:
FIGURE 1 illustrates a section view of the brake fail-safe valve;
FIGURE 2 illustrates a section view of the brake fail-safe valve of Figure 1 depicting primary circuit failure; and
FIGURE 3 illustrates a section view of the brake fail-safe valve of Figure 1 depicting secondary circuit failure.
LIST OF REFERENCE NUMERALS
100 – Valve Assembly
102 – First Chamber
104 – Second Chamber
106 – First Inlet Port
108 – Third Inlet Port
110A – First Outlet Port
110B – Second Outlet Port
112 – Spring Loaded Piston Arrangement
114 – Stopper
115 – Second Inlet Port
116 – Fourth Inlet Port
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details, are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
When an element is referred to as being "mounted on," “engaged to,” "connected to," or "coupled to" another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer or section from another component, region, layer or section. Terms such as first, second, third etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
Terms such as “inner,” “outer,” "beneath," "below," "lower," "above," "upper," and the like, may be used in the present disclosure to describe relationships between different elements as depicted from the figures.
The present disclosure envisages a brake fail-safe valve assembly. The brake fail-safe valve assembly (herein after referred to as “assembly 100”) is described below with reference to Figure 1 to Figure 3.
The assembly 100 is operably connected between the braking system and a brake caliper. The braking system is having a primary circuit and a secondary circuit provided to direct hydraulic fluid to the brake caliper.
The assembly comprises a first chamber 102 and a second chamber 104. The assembly 100 is arranged proximal to front wheels of the vehicle.
The first chamber 102 is having a first inlet port 106 in fluid communication with the primary circuit, a second inlet port 115 in fluid communication with the second chamber 104 and a first outlet port 110A in fluid communication with front and rear brake calipers. The second chamber 104 is having a third inlet port 108 in fluid communication with the secondary circuit, a fourth inlet port 116 in fluid communication with the first chamber 102 and a second outlet port 110B in fluid communication with the front brake calipers.
The assembly 100 is configured to direct flow of fluid either from the secondary circuit to activate the brake caliper via the first outlet port 110A or the second outlet port 110B, thereby providing braking force to wheels of the vehicle upon failure of the primary circuit.
Each of the first chamber 102 and the second chamber have a spring loaded piston arrangement 112 disposed therewithin.
A stopper 114 is fixed within each of the first chamber 102 and the second chamber 104. The stopper 114 fixed within the first chamber 102 is configured to restrict upward movement of the spring loaded piston arrangement 112. The stopper 114 fixed in the second chamber 104 is configured to restrict downward movement of the spring loaded piston arrangement 112.
In an embodiment, a primary fluid line is in fluid communication with the primary circuit and is configured to pressurize the fluid to activate the brake caliper via the assembly 100 during failure of the secondary circuit. In an embodiment, a secondary fluid line is in fluid communication with the secondary circuit and is configured to pressurize the fluid to activate the brake caliper via the assembly 100 during failure of the primary circuit.
The working of the assembly 100 is explained under three different conditions as follows:
• All Circuits Healthy;
• Primary Circuit Fail; and
• Secondary Circuit Fail.
All Circuits Healthy:
In both circuit active condition, the first chamber 102 and the second chamber 104 are in equilibrium condition with same pressure from the first inlet port 106, the second inlet port 115, the third inlet port 108 and the fourth inlet port 116. The pressure of the fluid at all the inlet ports is equal to the pressure of fluid at the outlet port 110, as depicted in Figure 1.
Primary Circuit Fail:
During primary circuit fail, there is no fluid flowing from the primary circuit to the first inlet port 106 and the second inlet port 115 of the first chamber 102 upon application of the brake. The fluid is flowing from the third inlet port 108 and the fourth inlet port 116 of the second chamber 104. Due to this the fluid flowing from the third inlet port 108 towards the second outlet port 110B to activate the front brake calipers. The fluid flowing from the fourth inlet port 116 forces the spring loaded piston arrangement 112 to depress the spring and close the flow of fluid from the first chamber 102 to the first outlet port 110A, as depicted in Figure 2. Thus, the front calipers are activated by the second chamber 104, thereby generating a good amount of deceleration.
Secondary Circuit Fail:
During secondary circuit fail, the fluid flows from the first inlet port 106 the second inlet port 115 of the first chamber 102 to the outlet port 110. The fluid does not flow from the second chamber 104 to the first outlet port 110A, as the fluid flowing from the second inlet port 115 pressurizes the spring loaded piston arrangement 112 to depress and close the flow of fluid to the second outlet port 110B, as depicted in Figure 3. Thus front brake calipers and rear brake calipers are simultaneously activated by the first chamber 102, thereby generating a good amount of deceleration.
In either circuit fail condition i.e. the primary circuit fail or the secondary circuit fail, the spring loaded piston arrangement 112 will be held to same position until either of the circuit generates pressure. This helps to avoid backflow & fluid leakage.
Thus, the assembly 100 of the present disclosure delivers good braking performance in either circuit fail condition. The assembly 100 of the present disclosure helps in mitigating the concern of vehicle pulling during braking as compared to conventional braking systems.
TECHNICAL ADVANCES AND ECONOMICAL SIGNIFICANCE
The present disclosure described herein above has several technical advantages including, but not limited to, the realization of a brake fail-safe valve assembly, that:
• has improved braking performance in brake circuit fail condition; and
• mitigates concern of pulling of vehicle upon application of brakes.
The foregoing description of the specific embodiments so fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.