Claims:14
CLAIMS
We claim:
1. Multi convergent vanes in a vehicle disc brake comprising of:
An inlet passage (1)
guides or fins or vanes (2),(3),(4),(5)
passages (6) in between plates (8) (9)
a brake disc (7)
cheeks (10)
a neck (11)
plates (8) or (9)
a hat (12)
internal faces (13)
characterized in that the hat (12) of the brake disc (7) connects the brake
disc (7) with the cheeks(10).
2. The multi convergent vanes as claimed in Claim 1 wherein the hat (12)
is connected by the neck (11) with the plate (8) or (9).
3. The multi convergent vanes as claimed in Claim 1 and working thereof
wherein the rotating motion of the brake disc (7) gained from the cheeks
in case of powered axles or tires in case of non-powered axles is
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brought to rest by opposing torque generated at frictional interface
between the cheeks (10) and the friction pads on either side of the
cheeks (10).
4. The multi convergent vanes as claimed in Claim 1 and working thereof
wherein kinetic energy of a moving vehicle is translated into heat energy
raising temperature of the brake disc (7) surface.
5. The multi convergent vanes as claimed in Claim 1 and working thereof
wherein the heat energy is conducted to the internal faces (13) and to
the fins (2),(3),(4),(5) by conduction phenomenon.
6. The multi convergent vanes as claimed in Claim 1 and working thereof
wherein meanwhile, because of disc rotation, air flows out from
passages (6) in between the plates (8) (9) and generates suction at inlet
passage(1).
7. The multi convergent vanes as claimed in Claim 1 and working thereof
wherein the air flow is at ambient or closer to ambient temperature and
facilitates transfer of heat from the internal faces (13) and periphery of
the fins (2),(3),(4),(5) by convection phenomenon.
8. The multi convergent vanes as claimed in Claim 1 wherein a multi
convergent opposed dew drop vane construction is claimed.
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9. The multi convergent vanes as claimed in Claim 1 wherein an alternate
multi convergent dew drop with convergent vane is claimed.
10. The multi convergent vanes as claimed in Claim 1 wherein the
convergent vane can be used with different sized brake discs (7).
Dated this 18th day of June 2020
N. Surya Senthil – IN/PA-736
For JUS MAXIMA LAW OFFICES
To (Agent for Applicant)
The Controller of Patents
Patent Office in Chennai , Description:ABSTRACT
Multi convergent vanes in a vehicle disc brake for better thermal performance
comprising of the vanes or fins or guides that is encompassed within the friction
plates of the rotor in a vehicle brake. The heat dissipation from the brake disc
is improved through effective transfer of heat from the brake disc through the
improvement in the flow of air through the guides that are sandwiched between
the braking plates.Figure for publication – Figure 1.
.
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TITLE
MULTI CONVERGENT VANES IN A VEHICLE DISC BRAKE
FIELD OF THE INVENTION
This invention relates to fluid and thermal engineering, specifically applicable to
the brake system of automobiles. This invention more specifically relates to
multi convergent vanes in a vehicle disc brake, containing a hat, braking plates
and the vanes.
BACKGROUND OF THE INVENTION
Moving automotive vehicles are stopped by the actuation of a system which is
either operated by hydraulic or pneumatic means to bring a rotating mass that
is connected to the prime mover to rest. Energy transfer in this process leads to
change in the form of energy from mechanical to thermal at the rotating mass.
Upon stopping the rotating mass heats up to a condition wherein the
temperature of the rotating mass increases to a level that can affect the
performance of the rotating mass and the dependent or independent
neighbouring system. The arrangement of the guides within the rotating mass
helps in dissipating the heat to the fluid medium which is air in this type of
application.
Brake system involving the disc brakes are best suited for applications that
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requires quicker response to the signal from the driver and is popularly used in
all cars in the recent years. Light commercial vehicles, Heavy vehicles and
Trucks are added to the list of beneficiaries with this type of braking system.
The requirements increased with their usage for high speed vehicles,
regulatory requirements, expectations by end customers on consistent field
performance and the reliability of the system. While the various subsystems of
such a brake system like (i) the caliper assembly and its subsystems (ii) the
brake pad assembly and its subsystem (iii) friction material grade are few of the
vital players in the efficient performance of the brake system, the brake disc
plays a key role in achieving success in terms of the life of the brake disc and
life of the friction pad.
Indian Patent Application Number 2048/DEL/2014 is a prior art in this field
which reveals a vacuum pump for automobiles used for brake application
wherein a method of reducing power consumption and running torque in a
vacuum pump of a motor vehicle is explained. The invention also provides a
vacuum pump for automobiles comprising an actuator, a new vane locking
assembly, a new vane and rotor assembly, a new non return valve assembly,
the controlled oil supply means and a reed stopper assembly that reduces
power loss and unnecessary frictional forces and to maintain a controlled oil
supply to the vacuum pump.
Indian Patent Application Number 2055/DELNP/2003 discloses a rotor with
reduced wear and to a pump comprising such a rotor. Such a rotor of axis YY'
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comprises a vane carrier made from a material of lower hardness (37), at least
one vane, an element (39), made from a material of greater hardness, for the
transmission of a torque supplied by a drive device, for example a camshaft
driven by an engine, and a bearing part (1). The bearing part (I) comprises two
wings immovable radially with respect to the vane carrier. The bearing part (1)
is arranged in the rotor in such a way that the wings (3, 5) extend between the
vane carrier (37) and the transmission element (38) in the region of the bearing
surfaces experiencing the wear, in order to transmit the bearing force of the
element (39) to the vane carrier (37), thus preventing the wear of the inner
surface of the vane carrier (37) caused by the transmission element (39).
Indian Patent Application Number 577/CHE/2003 discloses a brake rotor
having an annular disc connected to an annular mounting flange, the mounting
flange defining a radially inner flange wall and including a plurality of
circumferentially spaced mounting holes, in which the flange wall includes a
plurality of recesses, with each recess situated circumferentially between
adjacent mounting holes in which the brake rotor includes ventilation vanes
between opposing braking faces of the annular disc with at least some
ventilation vanes including inner vane portions which extend inwardly of a
radially inner edge of the annular disc.
The present invention overcomes the demerits of the prior art cited above,the
inventors have worked on improving the heat dissipation from the brake disc
through effective transfer of heat from the brake disc through the improvement
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in the flow of air through the guides that are sandwiched between the braking
plates.
The invention under discussion deals with the rotating disc of the brake system
of automobiles and more particularly relates to the orientation of the air guides
that facilitates the easy thermal management of the system when subjected to
increased temperature during the operation of the brakes.
.Arrangement of manufacturing friendly vanes,within the given boundary
conditions, which enhance the thermal performance of brake rotors is the main
claim of the applicants. Thermal performance of brake rotors aredriven by
material, braking plate thickness, air passage within the plates and the
gooseneck that connects the hat and the braking plate. The vanes/ fins,
controls the air passage within the inboard and outboard plates to result in
effective surface to volume ratio, thermal mass distribution, improved velocity
pattern that would lead to increased ability to carry heat from the plates and
better heat transfer coefficients.Due to the cost involved, complexity of shapes
proposed and packaging constraints, most of the designs are not
commercialized. The present invention is tested and has shown
enhancements.
This invention eventually addresses the above and proves to be performance
efficient, cost effective and eases the assembly. These and other objects of the
invention will become more apparent during the ensuing specification and
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claims when taken with the accompanying drawings.
Further it will be apparent to those skilled in the art that the objects of this
invention have been achieved by providing an effective thermal management
system as described in the above prior art. Various changes may be made in
and without departing from the concept of the invention. Additional features of
the invention will be described hereinafter that form the subject of the claims of
the invention. Those skilled in the art should appreciate that they can readily
use the disclosed conception and specific embodiment as a basis for designing
and modifying other methods and structures for carrying out the same purpose
of the present invention. Therefore, the scope of the invention is to be
determined by the terminology of the following claims and the legal equivalents
thereof.
OBJECTIVES OF THE INVENTION
This invention may be summarized, at least in part, with reference to its
objects.
The foremost object of the present invention is to present multi convergent
vanes in a vehicle disc brake.
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Another object of the present invention is to provide multi convergent vanes in
a vehicle disc brake that can enhance flow in between the plates of the braking
disc.
Another object of the present invention is to provide multi convergent vanes in
a vehicle disc brake that is manufacturing friendly.
A further object of the present invention is to provide multi convergent vanes in
a vehicle disc brake that is comparable with the existing in terms of weight and
facilitates interchangeability in field.
Additional objects, advantages and novel features of the invention will be set
forth in part in the description which follows, and in part will become apparent to
those skilled in the art upon examination of the following, or may be learnt by
practice of the invention.
SUMMARY OF THE INVENTION
The present invention embodies multi convergent vanes in a vehicle disc brake.
The entire assembly comprises of the following parts:
a. Inlet passage (1)
b. guides or fins or vanes (2),(3),(4),(5)
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c. passages (6) in between plates (8) (9)
d. a brake disc (7)
a. cheeks(10)
b. a neck (11)
c. plates(8) or (9)
d. a hat (12)
e. internal faces (13)
DESCRIPTION OF THE DRAWINGS
The advantages and features of the present invention will be more readily
apparent by persons skilled in the art when considered in reference to the
following description and when taken in conjunction with the accompanying
drawings listed below
FIG.1 is a schematic illustration of the brake system with a brake disc
FIG.2 is a view of section through the conventional brake disc
FIG.3 is a view of section through the invented brake disc
FIG.4 is an in-plane section through the conventional brake disc
FIG.5 is an in-plane section through the invented brake disc
FIG.6 is a graphical comparison of the temperature curve of the 2 discs in route
run
FIG.7 is a representation of the temperature curve of the conventional disc in a
ghat run
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FIG.8 is a graphical representation of the temperature curve of the invented
disc in a ghat run
Fig.9 is the multi convergent opposed dew drop vane of the present invention
and represents the fluid flow pattern through the guide vanes sandwiched
between the friction plates
Fig.10 is a cross sectional view of the alternate multi convergent dew drop with
convergent vane arrangement pattern 2 of the present invention
Fig.11 is a cross sectional view of the convergent vane arrangement pattern 3
of the present invention
DETAILED DESCRIPTION
The following description is presented to enable any person skilled in the art to
make and use the invention,and is provided in the context of particular
applications of the invention and their requirements. The present invention can
be configured as follows:
The present invention is multi convergent vanes in a vehicle disc brake.
Construction
According to a preferred embodiment of the present invention, 1, the entire
assembly of the present invention multi convergent vanes in a vehicle disc
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brake comprises of the hat, the braking plate and the guides or fins or vanes
and in detail comprises of the following parts:
a. inlet passage (1)
b. guides or fins or vanes (2),(3),(4),(5)
c. passages (6) in between plates (8) (9)
d. a brake disc (7)
e. cheeks(10)
f. a neck (11)
g. plates(8) or (9)
h. a hat (12)
i. internal faces (13)
Fig 9, 10 & 11 are the 3 different vane arrangements that are claimed in this
invention. Fig 9 is the multi convergent opposed dew drop vane, Fig 10 is the
alternate multi convergent dew drop with convergent vane and Fig 11 is the
convergent vane arrangement.
According to a preferred embodiment of the present invention, brake disc (7)
represented in all the above figures is the rotating member of the automobile
brake system that helps in bringing a moving vehicle to halt or that holds the
vehicle in place when parked. This part made of iron in general, is mounted on
the wheel end axle and is driven in most of the cases by the engine power. This
is mounted in between the axle and the wheel.
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According to a preferred embodiment of the present invention, the hat (12) of
the brake disc (7) is the member of the brake disc (7) that helps in connecting
the brake disc (7) with the cheeks(10). The hat (12) is connected by the neck
(11) with the plate (8) or (9). The rotating motion of the brake disc (7) gained
from the cheeks in case of powered axles or the tires in case of non-powered
axles is brought to rest by the opposing torque generated at the frictional
interface between the cheeks(10) and the friction pads on either side of the
cheeks (10). It is at this interface wherein the kinetic energy of the moving
vehicle is translated into heat energy. The heat generated raises the
temperature of the brake disc (7) surfaces. This in turn is conducted to the
internal faces (13) and to the fins (2),(3),(4),(5) by conduction phenomenon.
According to a preferred embodiment of the present invention, meanwhile,
because of disc rotation, air flows out from passages (6) in between the plates
(8) (9) and hence generate suction at inlet passage (1). This air flow is at
ambient or closer to ambient temperature and facilitates the transfer of heat
from the internal faces (13) and the periphery of the fins (2),(3),(4),(5)and the
likes by convection phenomenon.
According to a preferred embodiment of the present invention, the vanes
(2),(3),(4),(5)are constructed such that the flow of air is smooth without much of
losses in the form of no flow zones to enable efficient heat transfer between the
internal faces (13) and the flowing air. The shape, size, position and
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construction of the vanes (2),(3),(4),(5)enables a cooler running rotor.
While there has been shown and described what is considered to be preferred
embodiments of the invention, it will, of course, be understood that various
modifications and changes in form or detail could readily be made without
departing from the spirit of the invention. It is therefore intended that the
invention be not limited to the exact forms described and illustrated, but should
be constructed to cover all modifications that may fall within the scope of the
appended claims.
It will be apparent to those skilled in the art that the objects of this invention
have been achieved by providing the above invention. However various
changes may be made in the structure of the invention without departing from
the concept of the invention. Therefore, the scope of the invention is to be
determined by the terminology of the following claims and the legal equivalents
thereof.
Dated this18th day of June 2020
N. Surya Senthil – IN/PA-736
For JUS MAXIMA LAW OFFICES
(Agent for Applicant)
To:
The Controller of Patents
Patent Office in Chennai