Description:TECHNICAL FIELD
[001] The embodiments herein generally relate to tailpipes in vehicles and more particularly, to a tailpipe for an exhaust after treatment system in a low ground clearance vehicle having a single cylinder diesel engine.
BACKGROUND
[002] Generally, an exhaust after-treatment system in a vehicle is used to treat exhaust gases emitted from an engine to the atmosphere i.e., the exhaust after-treatment system is used to convert highly toxic pollutants (HC, CO, NOx, etc.,) present in the exhaust gas of the engine into lesser toxic pollutants (N2, CO2 and H2O). The exhaust after-treatment systems are commonly used in vehicles having diesel engines and lean-burn spark ignited engines. A conventional exhaust after-treatment system includes a diesel oxidation catalyst (DOC) substrate, a selective catalytic reduction (SCR) substrate and a diesel particulate filter (DPF). The DOC substrate is adapted to facilitate oxidation of unburnt hydrocarbons (HC), carbon monoxide (CO) and soluble organic fraction (SOF) of particulate matter (PM) in exhaust gas to form carbon dioxide (CO2) and water (H2O). The SCR substrate is adapted to facilitate reduction of oxides of nitrogen (NOx) in the exhaust gas to form oxygen (O2) and nitrogen (N2). The DPF is adapted to remove the particulates present in the exhaust gas.
[003] Unlike all the diesel engines that have muffler, a single cylinder diesel engine utilizes the exhaust after treatment system (EATS) to meet the emission norms/ noise, vibration and harshness (NVH) without the usage of muffler. The EATS includes multiple sensors like a nitrogen oxide (NOx) sensor and a differential pressure sensor to monitor exhaust emission. Further, the EATS is placed at a lower height considering the packaging layout of the vehicle. Also, an exhaust outlet of the tail pipe is exposed and facing in a direction to a rear side of the vehicle. This results in water entry into the tail pipe thereby damaging the NOx sensor placed in the tail pipe. These sensors are sensitive to dust particles and water considering their inbuilt electronic architecture which in turn leads to failure and disconnect in the electronic control unit (ECU) monitoring of the exhaust emission.
[004] Therefore, there exists a need for a tailpipe for an exhaust after treatment system in a vehicle, which obviates the aforementioned drawbacks.
OBJECTS
[005] The principal object of embodiments herein is to provide a tailpipe for an exhaust after treatment system in a vehicle.
[006] Another object of embodiments herein is to provide the tailpipe which restricts water entry into a housing of the exhaust after treatment system in a low ground clearance vehicle having a single cylinder diesel engine.
[007] Another object of embodiments herein is to provide the tailpipe which is adapted to restrict water entry into the housing of exhaust after treatment system thereby reducing the chances of damage/ failure of nitrogen oxide (NOx) sensor, a diesel oxidation catalyst (DOC) substrate, a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) substrate of the exhaust after treatment system.
[008] Another object of embodiments herein is to provide the tailpipe which is adapted to reduce accumulation of dust on the nitrogen oxide (NOx) sensor.
[009] Another object of embodiments herein is to provide an exhaust outlet of the tailpipe at a higher height when compared to exhaust outlet of the existing tailpipes in the low ground clearance vehicle having the single cylinder diesel engine.
[0010] Another object of embodiments herein is to provide the tailpipe with a curved (bent) shaped outlet section in which an exhaust outlet of the curved (bent) shaped outlet section is facing in a direction to a ground surface for the low ground clearance vehicle having the single cylinder diesel engine.
[0011] These and other objects of embodiments herein will be better appreciated and understood when considered in conjunction with following description and accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF DRAWINGS
[0012] The embodiments are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0013] Fig. 1 depicts a perspective view of a tailpipe connected to a housing of an exhaust after treatment system in a low ground clearance vehicle having a single cylinder engine, according to embodiments as disclosed herein;
[0014] Fig. 2 depicts another perspective view of the tailpipe connected to the housing of the exhaust after treatment system, according to embodiments as disclosed herein; and
[0015] Fig. 3 illustrates locating portions of a left-side outlet section and a right-side outlet section of the tailpipe, according to embodiments as disclosed herein.
DETAILED DESCRIPTION
[0016] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0017] The embodiments herein achieve a tailpipe which restricts water entry into a housing of an exhaust after treatment system in a low ground clearance vehicle having a single cylinder diesel engine. Referring now to the drawings figs. 1 through 3, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0018] Fig. 1 depicts a perspective view of a tailpipe (100) connected to a housing (10H) of an exhaust after treatment system (10), according to embodiments as disclosed herein. In an embodiment, tailpipe (100) includes an inlet section (102), a body section (104A, 104B) and an outlet section (106A, 106B). For the purpose of this description and ease of understanding, the tailpipe (100) is explained herein with below reference to restricting water entry into the housing (10H) of the exhaust after treatment system (10) in a low ground clearance vehicle having a single cylinder diesel engine. However, it is also within the scope of the invention to use/practice the tailpipe (100) in any other agricultural machines or any other off-road vehicles or any other vehicles, where restricting water entry into the housing of the exhaust after treatment system is required, without otherwise deterring the intended function of the tailpipe (100) as can be deduced from the description and corresponding drawings.
[0019] The housing (10H) is adapted to accommodate a diesel oxidation catalyst (DOC) substrate (not shown), a diesel particulate filter (DPF) and a selective catalyst reduction (SCR) substrate (not shown) therein. The inlet section (102) extends from the housing (10H) of the exhaust after treatment system (10). The inlet section (102) is adapted to allow the treated exhaust gas flow from the housing (10H) of the exhaust after treatment system (10) to the body section (104A, 104B) of the tailpipe (100).
[0020] The body section (104A, 104B) is adapted to allow the treated exhaust gas flow to the outlet section (106A, 106B). The body section (104A, 104B) angularly extends from the inlet section (102) at a first predefined angle (A). The first predefined angle is an angle between an axis ((104X), (as shown in fig. 1) of the body section (104A, 104B) and an axis ((102X), as shown in fig. 1)) of the inlet section (102). In an embodiment, the first predefined angle (A) is at least 93.93. In another embodiment, the first predefined angle (A) is in a range of 90° to 96°. The body section (104A, 104B) includes an angular body section (104A) and a linear body section ((104B), as shown in fig. 1)). The angular body section (104A) adjoins the inlet section (102). The linear body section (104B) extends between the angular body section (104A) and the outlet section (106A, 106B). The linear body section (104B) is adapted to facilitate mounting of a nitrogen oxide (NOx) sensor ((10S), (as shown in fig. 1 and fig. 3)) thereon. The linear body section (104B) is substantially parallel and near to the housing (10H) of the exhaust after treatment system (10).
[0021] The outlet section (106A, 106B) of the tailpipe (100) is adapted to vent the treated exhaust gas to outside. Further, the outlet section (106A, 106B) of the tailpipe (100) is adapted to restrict water entry into the housing (10H) of exhaust after treatment system (10) thereby reducing the chances of damage/ failure of NOx sensor (10S), and the DOC, DPF and SCR of the exhaust after treatment system (10). Furthermore, the outlet section (106A, 106B) of the tailpipe (100) which is adapted to reduce accumulation of dust on the NOx sensor (10S). The outlet section (106A, 106B) angularly extends from the body section (104) at a second predefined angle ((B), as shown in fig. 2)). The second predefined angle (B) is an angle between an axis ((106X), (as shown in fig. 2)) of the outlet section (106) and the axis (104X) of the body section (104A, 104B). In an embodiment, the second predefined angle (B) is at least 62.76. In another embodiment, the second predefined angle (B) is in a range of 59° to 65°. The outlet section (106A, 106B) includes a left-side outlet section (106A) and a right-side outlet section ((106B), (as shown in fig. 1 to fig. 3)) which are joined to each other to form the outlet section (106A, 106B). In an embodiment, a portion of the outlet section (106A, 106B) is at a height level which is near to an inlet (not shown) of the housing (10H).
[0022] The left-side outlet section (106A) defines a pair of first locating portions ((106Y), (only one of which is shown in fig. 3)), where one of the first locating portions (106Y) is positioned on a top portion of the left-side outlet section (106A) and another first locating portion (106Y) is positioned on a bottom portion of the left-side outlet section (106A). Similarly, the right-side outlet section (106B) defines a pair of second locating portions ((106Z), (as shown in fig. 3)) corresponding to the first locating portions (106Y) of the left-side outlet section (106A). One of the second locating portions (106Z) is positioned on a top portion of the right-side outlet section (106B), and another second locating portion (106Z) is positioned on a bottom portion of the right-side outlet section (106B). Each first locating portion (106Y) is adapted to be received by the corresponding second locating portion (106Z) to facilitate locating and assembling of the left and right-side outlet sections (106A, 106B). For the purpose of this description and ease of understanding, each first locating portion (106Y) of the left-side section (106A) is considered to be a protrusion, and correspondingly, each second locating portion (106Z) of the right-side outlet section (106B) is considered to be a groove.
[0023] In one embodiment, the left-side outlet section (106A) and the right-side outlet section (106B) are separate parts. In another embodiment, the left-side outlet section (106A) and the right-side outlet section (106B) are a unitary part. In an embodiment, the outlet section (106A, 106B) substantially defines a curved shape (bent shape). The outlet section (106A, 106B) defines an exhaust outlet ((106P), (as shown in fig. 2)) which is cut at 45 degrees. It is also within the scope of the invention to cut the exhaust outlet (106P) at any other angle. In an embodiment, an angle between the axis (102X) of the inlet section (102) and the axis (106X) of the outlet section (106) is at least 23.3. The exhaust outlet (106P) of the tailpipe (100) is facing in a direction to a ground surface.
[0024] The technical advantages of the tailpipe (100) are as follows. The tailpipe (100) is adapted to restrict water entry into the housing (10H) of exhaust after treatment system (10) thereby reducing the chances of damage/ failure of nitrogen oxide (NOx) sensor (10S), and the DOC, DPF and SCR of the exhaust after treatment system. The tailpipe (100) is adapted to restrict accumulation of dust on the nitrogen oxide (NOx) sensor. The exhaust outlet (106P) of the tailpipe (100) is provided at a higher height when compared to the exhaust outlet of the existing tailpipes in the low ground clearance vehicle having the single cylinder diesel engine.
[0025] The foregoing description of the specific embodiments will so fully reveal 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 embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications within the spirit and scope of the embodiments as described herein.
, Claims:1. A tailpipe (100) for an exhaust after treatment system (10) in a vehicle, said tailpipe (100) having:
an inlet section (102) extending from a housing (10H) of said exhaust after treatment system (10);
a body section (104A, 104B) angularly extending from said inlet section (102) at a first predefined angle (A); and
an outlet section (106A, 106B) angularly extending from said body section (104A, 104B) at a second predefined angle (B).
2. The tailpipe (100) as claimed in claim 1, wherein said first predefined angle is an angle between an axis (104X) of said body section (104A, 104B) and an axis (102X) of said inlet section (102), wherein said first predefined angle is in a range of 90° to 96°; and
said second predefined angle (B) is an angle between an axis (106X) of said outlet section (106) and the axis (104X) of said body section (104A, 104B), wherein said second predefined angle (B) is in a range of 59° to 65°.
3. The tailpipe (100) as claimed in claim 1, wherein said outlet section (106A, 106B) includes a left-side outlet section (106A) and a right-side outlet section (106B) which are joined to each other to form said outlet section (106A, 106B).
4. The tailpipe (100) as claimed in claim 3, wherein said left-side outlet section (106A) and said right-side outlet section (106B) are separate parts or a unitary part.
5. The tailpipe (100) as claimed in claim 3, wherein said left-side outlet section (106A) defines a pair of first locating portions (106Y);
said right-side outlet section (106B) defines a pair of second locating portions (106Z) corresponding to said first locating portions (106Y);
each of said first locating portion (106Y) is adapted to be received by said second locating portion (106Z) to facilitate locating and assembling of said left and right-side outlet sections (106A, 106B);
each of said first locating portion (106Y) is at least a protrusion; and
each of said second locating portion (106Z) is at least a groove.
6. The tailpipe (100) as claimed in claim 1, wherein said outlet section (106A, 106B) substantially defines a curved shape;
said outlet section (106A, 106B) defines an exhaust outlet (106P) which is cut at 45; and
said exhaust outlet (106P) is facing in a direction to a ground surface.
7. The tailpipe (100) as claimed in claim 1, wherein a portion of said body section (104A, 104B) includes,
an angular body section (104A) which is adjoining said inlet section (102); and
a linear body section (104B) extending between said angular body section (104A) and said outlet section (106A, 106B), wherein said linear body section (104B) is adapted to facilitate mounting of a nitrogen oxide (NOx) sensor (10S) thereon.
8. The tailpipe (100) as claimed in claim 2, wherein an angle between the axis (102X) of said inlet section (102) and the axis (106X) of said outlet section (106) is at least 23.3.
9. The tailpipe (100) as claimed in claim 7, wherein said linear body section (104B) is substantially parallel and near to said housing (10H) of said exhaust after treatment system (10); and
a portion of said outlet section (106A, 106B) is at a height level which is near to an inlet of the housing (10H).

10. The tailpipe (100) as claimed in claim 6, wherein said outlet section (106A, 106B) of said tailpipe (100) is adapted to restrict water entry into said housing (10H) of said exhaust after treatment system (10) of a low ground clearance vehicle having a single cylinder diesel engine.