FIELD OF THE INVENTION
[001] The present subject matter described herein generally relates to a vehicle
exhaust system, and more specifically to a vehicle exhaust pipe system for
exhaust gas temperature reduction.
5 BACKGROUND
[002] Automobiles are one of the leading contributors towards pollution,
global warming, air pollution and are also leading to increase in green house
gases. In order to keep the rising pollution under control, multiple regulatory
bodies of their specific jurisdictions have issued many norms for releasing the
10 exhaust gas with predefined parameters.
[003] To expel clean air exhaust gases from the automobiles to the
environment, the fuel has to be completely burnt and treated which has resulted in
expelling exhaust gas with very high temperature through the tail pipe outlet due
to exothermic reactions & regenerations in various catalysts.
15 [004] Due to the regulatory rules, the impact on the exhaust gas temperature is
increasing and the based on the past trends the temperature of the exhaust gases
have increased. This high temperature of exhaust gases can result in concerns of
thermal safety of vehicle and pedestrian safety.
[005] The exhaust gas with high temperature is very dangerous as it can cause
20 severe burns to the human who is beside the tail pipe.
[006] Therefore, there is an utmost requirement of reducing the temperature of
the exhaust gas at the tail pipe outlet to overcome the aforesaid objection.
SUMMARY
25 [007] Before the present system is described, it is to be understood that this
application is not limited to the particular machine or device, as there can be
3
multiple possible embodiments that are not expressly illustrated in the present
disclosures. It is also to be understood that the terminology used in the description
is for the purpose of describing the particular versions or embodiments only and is
not intended to limit the scope of the present application. This summary is
5 provided to introduce aspects related to a vehicle exhaust pipe system, and the
aspects are further elaborated below in the detailed description. This summary is
not intended to identify essential features of the proposed subject matter nor is it
intended for use in determining or limiting the scope of the proposed subject
matter.
10 [008] In an embodiment, a vehicle exhaust pipe system is disclosed. The
system comprises a first pipe having an inlet, a nozzle with an outlet, the outlet
having at least one first protruded surface extending from the first inner surface of
the nozzle. The inlet is enabled to receive exhaust gas. The system further
comprises a second pipe having an inlet, a perforated region and an outlet having
15 at least one protruded surface extending from the second inner surface of the outer
pipe. The first pipe and the second pipe are connected by insertion of the nozzle of
the first pipe through the outlet of the second pipe, up to a predefined length
wherein the nozzle is positioned within the perforated region.
20 BRIEF DESCRIPTION OF THE DRAWINGS
[009] The foregoing summary, as well as the following detailed description of
embodiments, is better understood when read in conjunction with the appended
drawings. For the purpose of illustrating the disclosure, there is shown in the
present document example constructions of the disclosure, however, the
25 disclosure is not limited to the specific methods and device disclosed in the
document and the drawing. The detailed description is described with reference to
the following accompanying figures.
[0010] Figure 1 illustrates a perspective view of a first pipe, in accordance with
an embodiment of the present disclosure.
4
[0011] Figure 2 illustrates a perspective view of a second pipe, in accordance
with an embodiment of the present disclosure.
[0012] Figure 3 illustrates an assembled perspective view of a vehicle exhaust
pipe system, in accordance with an embodiment of the present disclosure.
5 [0013] The figures depict various embodiments of the present disclosure for
purposes of illustration only. One skilled in the art will readily recognize from the
following discussion that alternative embodiments of the structures illustrated
herein may be employed without departing from the principles of the disclosure
described herein.
10
DETAILED DESCRIPTION OF INVENTION
[0014] Some embodiments of this disclosure, illustrating all its features, will
now be discussed in detail. The words "comprising", “having”, and "including,"
and other forms thereof, are intended to be equivalent in meaning and be open
15 ended in that an item or items following any one of these words is not meant to be
an exhaustive listing of such item or items, or meant to be limited to only the
listed item or items. It must also be noted that as used herein and in the appended
claims, the singular forms "a," "an," and "the" include plural references unless the
context clearly dictates otherwise. Although any devices and methods similar or
20 equivalent to those described herein can be used in the practice or testing of
embodiments of the present disclosure, the exemplary, devices and methods are
now described. The disclosed embodiments are merely exemplary of the
disclosure, which may be embodied in various forms.
[0015] Various modifications to the embodiment will be readily apparent to
25 those skilled in the art and the generic principles herein may be applied to other
embodiments. However, one of ordinary skill in the art will readily recognize that
the present disclosure is not intended to be limited to the embodiments illustrated,
but is to be accorded the widest scope consistent with the principles and features
described herein.
5
[0016] Referring now to figure 1, a perspective view of a first pipe (101) is
disclosed, in accordance with an embodiment of the present disclosure. The first
pipe (101) may have a first inlet (103) at first end and a nozzle (105) at the second
end, the nozzle (105) having an outlet (107). The inlet (103) is enabled to receive
5 the exhaust gas from the engine either directly or via any catalytic convertor. In
another embodiment, the inlet (103) may receive the exhaust gas from the engine
via a diesel particulate filter or diesel oxidation catalyst or any exhaust treatment
unit. The direction of exhaust gas is shown by arrow (109).
[0017] In another embodiment, the nozzle (105) may comprise at least one
10 protruded surface (111) which may protrude from the inner surface (113) of the
first pipe (101). The first protruded surface (111) may protrude in a wedge-shaped
protrusion or in a curved shaped protrusion or in a cuboidal shaped protrusion.
The first protruded surface (111) may begin protruding from the portion where the
nozzle (105) starts converging and ends at the peripheral region of the outlet
15 (107).
[0018] In yet another embodiment, the first pipe (101) may have a first
connecting section (115) which may enable the first pipe (101) to connect to the
any other pipe.
[0019] Referring now to Figure 2, a perspective view of a second pipe (201) is
20 disclosed, in accordance with an embodiment of the present disclosure. In an
embodiment, the second pipe (201) may have an inlet (203) at first end of second
pipe (201) and an outlet (205) at the second end of the second pipe (201). The
second pipe (201) may have a perforated region (207). The perforated region
(207) may comprise a plurality of holes (209) present along a predefined length of
25 the second pipe (201) starting from the inlet (203). The outlet (205) further has a
protruded surface (211) which may start at a portion of the second pipe (201)
where the perforated section (209) ends and continues up to the peripheral region
of the outlet (205).
6
[0020] In another embodiment, the second pipe may have a connecting section
(213) (not shown in figure) which may enable engagement with the first pipe
(101) by engagement with connecting section (115) of the first pipe (101).
[001] Referring now to Figure 3, an assembled solid line perspective view of a
5 vehicle exhaust pipe system (301) is disclosed, in accordance with an embodiment
of the present disclosure. In an embodiment, the vehicle exhaust pipe system
(301) is disclosed to be implemented at the tail pipe end or at that portion of
exhaust pipe where the exhaust gas is released from the vehicle to the atmosphere.
[002] In an embodiment, the vehicle exhaust pipe system (301) may comprise
10 the first pipe (101) and the second pipe (201) joined or attached together. The
nozzle (105) of first pipe (101) is inserted in the second pipe (201) from the inlet
(203). The connecting section (115) of the first pipe (101) is connected to a
connecting section (213) of the second pipe (201). The connection is such that the
nozzle (105) is present within the perforated region (207) of the second pipe
15 (103). The connection may be a press fitted connection or a weld type connect or
any connection which enables an airtight connection and may require tees,
reducers, unions, couplings, crosses, caps, swage nipples, plugs, bushings,
adapters, outlets, valves & flanges.
[0021] In yet another embodiment, the nozzle (105) enables to converge the
20 exhaust gas which results in increase in velocity of the exhaust gas. The increase
on velocity of exhaust gas may result in the reduction of pressure of exhaust gas at
the outlet (107) and further in the perforated region (207). The nozzle (105)
enables to drop the pressure of the exhaust gas below the atmospheric pressure.
The exhaust gas with reduced pressure, which is below the atmospheric pressure,
25 when expelled through the outlet (107) in the perforated region may cause the
suction of ambient air through the plurality of holes (209).
[0022] In yet another embodiment, the formation of exhaust gas jet stream is
disturbed by the protruded surface (111). The protruded surface (111) may disturb
the flow of the exhaust gas stream which is arriving from the inlet (103) of the
30 first pipe (101).
7
[0023] In yet another embodiment, the protruded surface (111) may affect the
exhaust gas jet stream to split into a plurality of jet streams. The single exhaust
stream gets divided into a plurality of jet streams.
[0024] In yet another embodiment, the protruded surface (111) enables
5 comparatively more surface interaction with the exhaust gas stream during the
splitting of the exhaust gas stream into plurality of exhaust gas jet stream.
[0025] In yet another embodiment, the plurality of holes (209) may enable the
ambient air or exhaust gas to transfer within and from the second pipe (201) based
on pressure difference generated in the second pipe (201) due to the transition of
10 the plurality of exhaust gas jet streams with higher velocity within the second pipe
(201).
[0026] The ambient air may get mixed with the plurality of high-speed exhaust
gas jet streams which may cause the reduction of the temperature of the exhaust
gas jet streams further resulting in the formation of a mixed exhaust gas stream.
15 The reduction of temperature may happen because of the mixing of ambient air
which has temperature lower than the temperature of the plurality of exhaust gas
jet streams.
[0027] In an embodiment, the mixed gas within the perforated region (207)
further travels and pass through the outlet (205) and further get disturbed for the
20 second time by the protruded surface (211) present from the inner side of the
second pipe (201). The disturbance caused by the protruded surface (211) further
prevents the stabilization of the mixed exhaust gas stream and leading to the
formation of a plurality of jet streams of the mixed exhaust gas.
[0028] In yet another embodiment, the plurality of jet streams of the mixed
25 exhaust gas further causes the mixing of the mixed exhaust gas to mix with the
ambient air present at the peripheral region of the outlet (205) further causing the
reduction of temperature of the mixed exhaust gas.
[0029] The vehicle exhaust pipe system (301) enables the temperature reduction
two times by formation of plurality of exhaust gas jet streams and plurality of
8
mixed exhaust gas jet streams. The methodology in which first temperature
reduction is by formation of the plurality of jet streams of the exhaust gas and
further leading to mixing of the ambient air through the plurality of holes (209).
The second temperature reduction step is by formation of a plurality of mixed
5 exhaust gas jet streams to initiate the mixing of the plurality of mixed exhaust gas
jet streams with the ambient air present at the peripheral region of the outlet (205).
[0030] Although the present disclosure is provided with one first pipe (101)
having the nozzle, the vehicle exhaust pipe system (100) is not limited to
assembly of only one first pipe and there may an assembly of plurality of first
10 pipes (101) and perforated sections (104) arranged alternately in series followed
by a second pipe (103) at the end point.
[0031] Although the present disclosure describes the method of reducing the
exhaust gas temperature only twice, mixing once with the ambient air in
perforated section (104) once and mixing once with the ambient air at the second
15 outlet (105), however the steps of reduction of temperature by mixing may be
performed with a plurality of combinations using multiple ambient air mixing
through the perforated section (104).
[0032] Exemplary embodiments discussed above may provide certain
advantages. Though not required to practice aspects of the disclosure, these
20 advantages may include the following.
Equivalents
[0033] With respect to the use of substantially any plural and/or singular terms
herein, those having skill in the art can translate from the plural to the singular
and/or from the singular to the plural as is appropriate to the context and/or
25 application. The various singular/plural permutations may be expressly set forth
herein for sake of clarity.
[0034] It will be understood by those within the art that, in general, terms used
herein, and especially in the appended claims (e.g., bodies of the appended
claims) are generally intended as "open" terms (e.g., the term "including" should
9
be interpreted as "including but not limited to," the term "having" should be
interpreted as "having at least," the term "includes" should be interpreted as
"includes but is not limited to," etc.). It will be further understood by those within
the art that if a specific number of an introduced claim recitation is intended, such
5 an intent will be explicitly recited in the claim, and in the absence of such
recitation no such intent is present. For example, as an aid to understanding, the
following appended claims may contain usage of the introductory phrases "at least
one" and "one or more" to introduce claim recitations. However, the use of such
phrases should not be construed to imply that the introduction of a claim recitation
10 by the indefinite articles "a" or "an" limits any particular claim containing such
introduced claim recitation to inventions containing only one such recitation, even
when the same claim includes the introductory phrases "one or more" or "at least
one" and indefinite articles such as "a" or "an" (e.g., "a" and/or "an" should
typically be interpreted to mean "at least one" or "one or more"); the same holds
15 true for the use of definite articles used to introduce claim recitations. In addition,
even if a specific number of an introduced claim recitation is explicitly recited,
those skilled in the art will recognize that such recitation should typically be
interpreted to mean at least the recited number (e.g., the bare recitation of "two
recitations," without other modifiers, typically means at least two recitations, or
20 two or more recitations). Furthermore, in those instances where a convention
analogous to "at least one of A, B, and C, etc." is used, in general such a
construction is intended in the sense one having skill in the art would understand
the convention (e.g., "a system having at least one of A, B, and C" would include
but not be limited to systems that have A alone, B alone, C alone, A and B
25 together, A and C together, B and C together, and/or A, B, and C together, etc.).
In those instances, where a convention analogous to "at least one of A, B, or C,
etc." is used, in general such a construction is intended in the sense one having
skill in the art would understand the convention (e.g., "a system having at least
one of A, B, or C" would include but not be limited to systems that have A alone,
30 B alone, C alone, A and B together, A and C together, B and C together, and/or A,
B, and C together, etc.). It will be further understood by those within the art that
10
virtually any disjunctive word and/or phrase presenting two or more alternative
terms, whether in the description, claims, or drawings, should be understood to
contemplate the possibilities of including one of the terms, either of the terms, or
both terms. For example, the phrase "A or B" will be understood to include the
5 possibilities of "A" or "B" or "A and B."
[0035] Although implementations for a collapsible support to luggage floor
carpet have been described in language specific to structural features and/or
methods, it is to be understood that the appended claims are not necessarily
limited to the specific features described. Rather, the specific features are
10 disclosed as examples of implementation for the collapsible flaps to luggage floor
carpet.
[0036] Following is a list of elements and reference numerals used to explain
various embodiments of the present subject matter.
Reference Numeral Element Description
101 First pipe
103 Inlet
105 Nozzle
107 Outlet
109 Exhaust Gas
111 Protruded surface
113 Inner Surface
115 Connecting section
201 Second Pipe
11
203 Inlet
205 Outlet
207 Perforated region
209 Holes
211 Protruded surface
213 Connecting section
301 Vehicle Exhaust Pipe System, also referred as System
12
WE CLAIM:
1. A vehicle exhaust pipe system (301) comprising:
a first pipe (101) having an inlet (103), a nozzle (105) with an outlet
5 (107), the outlet having at least one first protruded surface (111) extending
from the first inner surface (113) of the nozzle (105),
the inlet (103) is enabled to receive exhaust gas;
a second pipe (201) having an inlet (203), a perforated region (207)
and an outlet (205) having at least one protruded surface (211) extending
10 from the second inner surface (107) of the outer pipe (201),
the first pipe (101) and the second pipe (201) are connected by
insertion of the nozzle (105) of the first pipe (101) through the outlet (205) of
the second pipe (201), up to a predefined length wherein the nozzle (105) is
positioned within the perforated region (207).
15 2. The system (301) as claimed in claim 1, wherein the exhaust gas received at
the inlet (103) of the first pipe (101) is expelled through the outlet (205) of
the second pipe (201).
3. The system (301) as claimed in claim 1, wherein the first inlet (102) of the
20 first pipe (101) is enabled to receive the exhaust gas from an engine via a
catalytic convertor or diesel particulate filter or diesel oxidation catalyst.
4. The system (301) as claimed in claim 1, wherein the first protruded surface
(111) and the second protruded surface (211) have one of a wedge-shaped
25 surface, a curved shaped surface, or a cuboidal shaped surface.
13
5. The system (301) as claimed in claim 1, wherein a connecting section (115)
of the first pipe (101) is connected to an inner surface of the second pipe
(201) at the connection section (213).
5 6. The system (301) as claimed in claim 1, wherein the perforated region (207)
of the second pipe (201) comprises a plurality of holes (109) present along a
predefined length of the second pipe (103201
7. The system (301) as claimed in claim 1, wherein the protruded surface (213)
10 extends between the perforated region (207) and the outlet (205).
8. The system (301) as claimed in claim 1, wherein the exhaust gas stream
arriving from the inlet (103) is disturbed along the nozzle (105) by the
protruded surface (111) thereby generating a plurality of exhaust gas jets
15 through the outlet (107) of the first pipe (101).
9. The system (301) as claimed in claim 8, wherein the flow the plurality of
exhaust gas jets from the nozzle (105) having higher velocity result in
reduction of pressure of the exhaust gas below atmospheric pressure within
20 the perforated region (207) causing the flow of the ambient air through the
holes (209) which further mixes with the plurality of exhaust gas jets for
forming a mixed exhaust gas stream.
10. The system (301) as claimed in claim 9, wherein the mixing of the ambient
25 air and the plurality of exhaust gas jets from the nozzle (105) forms a mixed
exhaust gas stream having a temperature lower than the exhaust gas.
11. The system (301) as claimed in claim 10, wherein the flow of mixed exhaust
gas stream in the second pipe (201) is disturbed by the protruded surface
14
(211) at the outlet (205) which generates a plurality of mixed exhaust gas jets
through the outlet (205) thereby lowering the temperature of the plurality of
mixed exhaust jets by mixing with the ambient air.