[001] The present invention, in general, relates to an EGR system in an internal combustion engine and, more particularly, to an EGR system in an inclined engine.
BACKGROUND OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention.
[003] Controlled engine exhaust gas recirculation is a known technique for reducing oxides of nitrogen in products of combustion that are exhausted from an internal combustion engine to atmosphere. A known EGR system comprises an EGR valve that is controlled in accordance with engine operating conditions to regulate the amount of engine exhaust gas that is recirculated to the induction fuel-air flow entering the engine for combustion so as to limit the combustion temperature and hence reduce the formation of oxides of nitrogen. Whereas in gasoline engines, EGR is generally added to increase the fuel economy by decreasing the part load pumping losses.
[004] The use of exhaust gas recirculation (EGR) systems in internal combustion engines is well known. A typical EGR system takes a fraction of the exhaust gases from the exhaust manifold and injects it into the intake air for the engine where it is mixed with fresh air and fuel and then reburned. Mixing exhaust gases with fresh intake air and fuel lowers peak combustion temperatures thereby reducing formation rates of oxides of nitrogen in the exhaust gas. Whereas in gasoline engines, EGR is generally added to increase the fuel economy by decreasing the part load pumping losses. The use of an EGR system for the injection of exhaust gases into the intake air requires a plurality of separate components. The separate components can pose a problem since the space available in vehicle engine compartments is typically limited

[005] It is known to mount EGR valves on engine intake manifolds where the valves are subject to a harsh operating environment that includes wide temperature extremes, water splashes and vibrations. Further, stringent demands imposed by governmental regulation of exhaust emissions have created a need for improved control of such valves. An EGR valve that possesses more accurate and quicker response can be advantageous by providing improved control of tailpipe emissions, improved driveability, and/or improved fuel economy for a vehicle having an internal combustion engine that is equipped with an EGR system. A valve that is more compact in size can be advantageous because of limitations on available space in a vehicle engine compartment. It should also be possible to attain further economies and benefits by more fully integrating EGR valves with intake manifolds.
[006] Currently, the EGR valve is mounted on the cylinder head and the cylinder head has a gallery for EGR gas flow. An EGR outlet pipe connects the cylinder head and the intake manifold. In surge tank, EGR gets mixed with fresh air coming from throttle and distributed to each cylinder.
[007] Due to inclined configuration of engine and mounting of engine under the seats - EGR valve which is mounted on the exhaust side becomes near to the ground and the tendency for splash of water on to the EGR valve increases and also temperature is high due to less flow of fresh air due to engine mounting below seat.
[008] As the entire length of circuit is also more - the transient response of EGR whenever the EGR valve opens is very poor.
[009] Therefore, there is a need to provide an EGR valve mounting arrangement on an intake manifold which can overcome the above mentioned drawbacks.
OBJECTIVES OF THE INVENTION
[0010] It is therefore the object of the invention to overcome the aforementioned and other drawbacks existing in prior systems.

[0011] Another object of the present invention is to provide an EGR system in an inclined engine.
[0012] Another object of the present invention is a mounting arrangement for an EGR system in an inclined engine.
[0013] Another object of the present invention is to provide an EGR valve mounting arrangement on the surge tank.
[0014] Another object is to reduce the vibration on the EGR valve.
[0015] Another object of the present invention is to provide an EGR valve mounting arrangement on an intake manifold which provides a quick transient response.
[0016] Yet another object of the present invention is to provide an EGR valve mounting arrangement on an intake manifold which protects the EGR valve from water splashing.
[0017] Yet another object of the present invention is to provide an EGR valve mounting arrangement on an intake manifold which protects the EGR valve from extreme temperatures.
[0018] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description.
SUMMARY OF THE INVENTION
[0019] To attain the above objects, the present invention provides an EGR system in an inclined engine with a mounting arrangement, the arrangement comprises of an EGR valve, an EGR cooler, a surge tank, a cylinder block (206) and an EGR pipe such that the EGR valve is connected to the surge tank through an adapter and the EGR cooler is mounted on the cylinder block and connected to the EGR valve through the EGR pipe.

[0020] In an aspect, the adapter comprises of an upper part and a base part such that the base part is integrated with the surge tank.
[0021] In an aspect, the adapter provides a gallery for connecting the EGR valve.
[0022] In an aspect, the cylinder block is inclined with respect to the plane and is placed under the seat floor of the vehicle.
[0023] In an aspect, the cylinder block, an oil pan and a transmission unit is placed below the EGR valve.
[0024] In an aspect, the structure of the surge tank includes an integrated and protruded EGR gallery and a purge gallery.
[0025] In an aspect, the EGR gallery and the purge gallery merge with a throttle.
[0026] In an aspect, the EGR gallery and the purge gallery are placed on opposite sides of the throttle.
[0027] In an aspect, the EGR gallery provides a passageway for the combustion air from the EGR valve to the intake manifold to mix with fuel at the throttle.
[0028] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0029] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by the following detailed description.
[0030] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWING
[0031] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein:
[0032] Figure 1 illustrates the existing EGR valve mounting arrangement;
[0033] Figure 2 illustrates an EGR valve mounting arrangement on an intake manifold, according to one of the embodiment of present subject matter;
[0034] Figure 3 illustrates the back side view of an EGR valve mounting arrangement on an intake manifold, according to one of the embodiments of present subject matter;
[0035] Figure 4 illustrates the side view of an EGR valve mounting arrangement on an intake manifold, according to one of the embodiments of present subject matter;
[0036] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of an EGR system mounting arrangement on an intake manifold, according to an embodiment of the present invention structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION OF THE INVENTION
[0037] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular

forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alterative falling within the scope of the disclosure.
[0038] As used in the description herein and throughout the claims that follow, the meaning of "a", "an", and "the" include plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.
[0039] The terms "comprises", "comprising", or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to the system, or assembly, or device. In other words, one or more elements in a system or device proceeded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the system, apparatus or device.
[0040] Hereinafter an EGR system (201) in an inclined engine with a mounting arrangement (200) is explained in detail.
[0041] Referring to figures 2, 3 and 4, illustrating an EGR system (201) in an inclined engine with a mounting arrangement (200) and the sectional view of the same according to one of the embodiments of present subject matter.
[0042] The EGR system (201) in an inclined engine with a mounting arrangement (200), the arrangement (200) comprises of an EGR valve (203), an EGR cooler (204), a surge tank (205), a cylinder block (206) and an EGR pipe (207) wherein the EGR valve (203) is connected to the surge tank (205) through an adapter (208) and the EGR cooler (204) is mounted on the cylinder block (206) and connected to the EGR valve (203) through the EGR pipe (207).
[0043] The arrangement (200) allows the EGR valve (203) to be mounted towards the intake side of the intake manifold (202) where the temperature is less. The EGR

valve (203) is connected to the surge tank (205). The mounting point of the surge tank (205) is higher compared to the mounting point of a cylinder block (206) which also results in the protection of EGR valve (203) as the cylinder block (206), an oil pan (212) and a transmission unit (213) of the engine is placed below the EGR valve
(203).
[0044] The adapter (208) is a two-part structure; an upper part (208a) and a base part (208b). Further, the base part (208b) is integrated with the surge tank (205).
[0045] The adapter (208) which connects the EGR valve (203) to the intake manifold surge tank (205) is mounted on the intake manifold surge tank (205) and further provides an EGR gallery (209), which is an integrated and a protruding structure on the surge tank (205). The EGR gallery (209) and a purge gallery (210) are an integral part of the surge tank (205) and merge with a throttle (211). The gases from EGR valve (EGR gas) flows through this EGR gallery (209) and purge gallery (210) and mixes with fuel at a throttle (211) of the intake manifold (202).
[0046] In an embodiment, the EGR gallery (209) and the purge gallery (210) are placed on the opposite sides of the throttle (211).
[0047] The EGR gallery (209) and the purge gallery (210), on the surge tank (205), also increase the overall stiffness and address the Vibration issue of EGR valve (203) because they are mounted on the Intake manifold surge tank (205).
[0048] Since the EGR valve (203 is mounted directly on the Intake manifold surge tank (205) where the EGR gases gets mixed with fresh air, the transient response is good because the Exhaust gas from EGR does not have to travel a long distance to get mixed with the fresh air.
[0049] Each of the appended claims defines a separate invention, which for infringement purposes are recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific

embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0050] 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 application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
[0051] 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 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 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 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 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 two or more recitations).

[0052] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.
[0053] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0054] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[0055] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope being indicated by the following claims.

Claim

1.An EGR system (201) in an inclined engine with a mounting arrangement
(200) comprising:
an EGR valve (203);
an EGR cooler (204);
a surge tank (205);
a cylinder block (206); and
an EGR pipe (207);
Characterized in that
the EGR valve (203) is connected to the surge tank (205) through an adapter
(208) and the EGR cooler (204) is mounted on the cylinder block (206) and
connected to the EGR valve (203) through the EGR pipe (207).
2. The arrangement (200) as claimed in claim 1, wherein the adapter is in two parts, an upper part (208a) and a base part (208b), and its base part (208b) is integrated with the surge tank (205).
3. The arrangement (200) as claimed in claim 1, wherein the adapter (208), provides a gallery (209a) for connecting the EGR valve (203).
4. The arrangement (200) as claimed in claim 1, wherein the cylinder block (206) is inclined with respect to the plane and is placed under the seat floor of the vehicle.
5. The arrangement (200) as claimed in claim 1, wherein the cylinder block (206), an oil pan (212) and a transmission unit (213) is placed below the EGR valve (203).
6. A surge tank (205) comprising an integrated and protruded EGR gallery
(209) and a purge gallery (210).

7. The surge tank (205) as claimed in claim 6, wherein the EGR gallery (209) and the purge gallery (210) merge with a throttle (211).
8. The surge tank (205) as claimed in claim 6, wherein the EGR gallery (209) and the purge gallery (210) are placed on opposite sides of the throttle (211)