DESC:

FORM 2

THE PATENTS ACT, 1970 (39 of 1970)
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)

1. TITLE OF THE INVENTION:

INTAKE MANIFOLD WITH INTERNAL EGR PASSAGE

2. APPLICANT(S):

a) Name: ESCORTS KUBOTA LIMITED

b) Nationality: Legal entity incorporated under the laws of India

c) Address: Escorts Kubota Limited, Knowledge Management Centre, 15/5, Mathura Road, Faridabad – 121003 (India)

PREAMBLE TO THE DESCRIPTION:

(v ) COMPLETE: The following specification particularly describes the invention

and the manner in which it is to be performed:

INTAKE MANIFOLD WITH INTERNAL EGR PASSAGE

Field of the Invention:

The present invention relates to an ‘Intake Manifold With Internal EGR (Exhaust Gas Recirculation) Passage in 3-Cylinder Engine to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture (Air + EGR) across the all three intake ports and to reduce the overall packaging size.
As per the instant disclosure, a separate Exhaust Gas Recirculation (EGR) passage is provided inside the intake manifold in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner. This will help to get the homogeneous mixture inside the cylinder ports. Such design of the ‘Intake Manifold With Internal EGR Passage’ is also helpful to avoid the external EGR setup from EGR valve to intake manifold, which results in reduce the packaging size and cost of additional components.

Background and object of the present invention:
Conventionally, EGR mixtures are known and in every combustion engine, one or another kind of arrangement of EGR and intake manifold is provisioned.
The prior art US8056340B2 describes a motor-vehicle engine system, which comprises:
• an engine having an intake manifold and an exhaust manifold;

• a turbine configured to receive exhaust from the exhaust manifold;
• a compressor mechanically coupled to the turbine and configured to supply air to the intake manifold; and
• an EGR mixer comprising an upstream conduit section having a contracting flow area in a direction of air flow through the mixer, a downstream conduit section having an expanding flow area in the direction of air flow through the mixer, a plurality of circumferentially arranged slots formed in the downstream conduit section for admitting exhaust to the air flow, an abrupt flow-expanding ridge disposed between the upstream and downstream conduit sections downstream of the slots, and an exhaust chamber arranged circumferentially around the upstream and/or downstream conduit sections fluidically coupled between an EGR passage and the slots,
• wherein the upstream conduit section is coupled to an air cleaner, wherein the downstream conduit section is coupled upstream of the compressor in an intake air-flow direction and wherein the exhaust chamber is coupled downstream of the turbine in an exhaust-flow direction; and
• wherein the EGR mixer is externally coupled to the intake manifold.
Another art JP4780059B2 describes:-

• an intake variable valve mechanism that can change the valve opening characteristic of the intake valve and an exhaust variable valve mechanism that can change the valve opening characteristic of the exhaust valve, and reduce the exhaust purification catalyst arranged in the exhaust passage A control device for a compression ignition internal combustion engine that performs rich combustion for the purpose,
• An intake valve control means for controlling the opening timing of the intake valve to the advance side so that the intake air flow rate at the initial stage of the intake stroke is increased as compared with the non-rich combustion when the rich combustion is performed; When the rich combustion is performed, an exhaust valve control means for controlling the closing timing of the exhaust valve to the advance side as compared with the non-rich combustion;
• Equipped with a, when the rich combustion is performed, the intake valve control means and the exhaust valve control means, when the operating range of the internal combustion engine is in a low load range, the intake valve opening period and the exhaust valve opening period DOO valve overlap period overlap such is not provided, the control device for a compression ignition internal combustion engine, characterized that you determine respective advance amount of the intake and exhaust valves.
One other prior art US7066129B2 describes an air intake system for an internal combustion engine includes a manifold defining a chamber in which air is distributed to a plurality of engine cylinders. The chamber includes an inlet and a plurality of outlets, each outlet providing fluid communication between the chamber and an engine cylinder. Each of the plurality of outlets is substantially the same distance from the inlet to provide more consistent gas flow rates through the outlets. The air intake system preferably includes a plurality of runners. Each of the plurality of runners defines a passageway that interconnects one of the outlets to a respective engine cylinder. Each passageway is characterized by the same length and the same cross sectional area.
One another prior art US20140331669A1 describes a mixer, for use with an internal combustion engine, for mixing EGR gas from an EGR loop with fresh air from the engine's fresh air intake. The mixer has an outer shell having the general shape of a thin-shelled hollow cylinder with a side entry port. One end of the cylinder provides a straight entry port and the other end of the cylinder provides a straight exit port. An inner sleeve fits inside the outer shell such that a space is provided between the inner sleeve and the outer shell, and a passageway is formed inside the inner sleeve through the length of the mixer. The inner sleeve has a series of flow ribs extending from its outer surface within the space, and has entry holes for providing fluid communication from the space into the passageway.

Though there are several kinds of EGR and air mixing mechanisms available for vehicular combustion engines, the automobile industry, particularly the agricultural vehicles and construction equipment manufacturing industry, continuously explore for new and more effective mechanism for exhaust gas recirculation (EGR) systems.
The subject matter invention ‘INTAKE MANIFOLD WITH INTERNAL EGR PASSAGE’ herein is a novel and non-obvious effort to create a mechanism for 3-Cylinder Engine to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture of ‘air and exhaust gas recirculation’ (Air + EGR) across the all three intake ports and to reduce the overall packaging size.
The prime object of the present invention is to provide an ‘INTAKE MANIFOLD WITH INTERNAL EGR PASSAGE’ in 3 Cylinder Engine to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture (Air + EGR) across the all three intake ports and to reduce the overall packaging size.
Another object of the instant invention is to provide separate EGR passage, provided inside the intake manifold, in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner.
Another object of the instant invention is to provide a novel mechanism to get the homogeneous mixture inside the cylinder ports.
Another object of the instant invention is to provide such a novel mechanism which is helpful to avoid the external EGR setup from EGR valve to intake manifold, and which results in reduce the packaging size and cost of additional components.
Brief Description of the Drawings:
Figure 1: Illustrates the architecture of the operation of different components involved in the functioning of the invented ‘Intake Manifold With Internal EGR Passage’.
Figure 2: Illustrates the schematic complete view of the ‘Intake Manifold With Internal EGR Passage’, showing major structural components/features therein, including the preferred length of the said device;
Figure 3: Illustrates another schematic complete view of the ‘Intake Manifold With Internal EGR Passage’, showing major structural components/features therein, including the preferred width of the said device;
Figure 4: Illustrates another schematic complete view of the ‘Intake Manifold With Internal EGR Passage’, showing major structural components/features therein, including the preferred height of the said device;
Numeric References used in the Figures:-
1 Represents the overall embodiment of the Intake Manifold With Internal EGR Passage
2 Exhaust Gases From EGR Valve
3 Mixing Chamber within the said Manifold, for mixing of Fresh Air and the Exhaust Gases from the EGR Valve
4 Fresh ambient air, coming to the Mixing Chamber (3)
5 Cylindrical passage between the EGR Valve and the Mixing Chamber (3), through which the exhaust gases, coming from the EGR Valve, travel towards the Mixing Chamber (3)
Intake Port-1 Port-1 of the three intake ports of the 3-Cylinder Engine, across which the homogeneous mixture of ‘air and exhaust gas recirculation’ (Air + EGR) occur
Intake Port-2 Port-2 of the three intake ports of the 3-Cylinder Engine, across which the homogeneous mixture of ‘air and exhaust gas recirculation’ (Air + EGR) occur
Intake Port-3 Port-3 of the three intake ports of the 3-Cylinder Engine, across which the homogeneous mixture of ‘air and exhaust gas recirculation’ (Air + EGR) occur
SHORT DESCRIPTION OF THE INVENTION:
The subject matter invention disclosed herein relates to an ‘Intake Manifold With Internal EGR Passage’, which particularly relates a novel and non-obvious mechanism for 3-Cylinder Engine to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture of ‘air and exhaust gas recirculation’ (Air + EGR) across the all three intake ports and to reduce the overall packaging size. Said Intake Manifold With Internal EGR Passage comprises separate EGR passage, provided inside the intake manifold, in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner.
The present invention relates to an ‘Intake Manifold With Internal EGR Passage’ in 3-Cylinder Engine to provide the uniform mixing of exhaust gases (2) from EGR Valve with fresh air (4) inside the manifold runner, mainly involving the Mixing Chamber (3) positioned at distal end of the separate passage (5) for said exhaust gases (2), in order to ensure the homogeneous mixture (Air+EGR) across the all three intake ports and to reduce the overall packaging size. This new design of ‘Intake Manifold with Internal EGR Passage’ is not only able to achieve the targeted performance in terms of uniform EGR mixing with fresh air inside the manifold runner, but also avoids the external EGR setup components in order to achieve the less packaging size with this design.
The instant invention is to provide a novel mechanism to get the homogeneous mixture inside the cylinder ports. Said invention is to provide such a novel mechanism which is helpful to avoid the external EGR setup from EGR valve to intake manifold, and which results in reduce the packaging size and cost of additional components.
DETAILED DESCRIPTION OF INVENTION
With the help of this new design of ‘Intake Manifold with Internal EGR Passage’ we are able to achieve the targeted performance in terms of uniform EGR mixing with fresh air inside the manifold runner, also avoided the external EGR setup components in order to achieve the less packaging size with this design.
The Manifold With Internal EGR Passage, to be applied preferably in the 3-Cylinder Engine, comprises an air-EGR mixing chamber and a separate EGR passage inside the intake manifold to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture (Air + EGR) across the all three intake ports and to reduce the overall packaging size; wherein said Intake Manifold With Internal EGR Passage comprises novel constructional and operational features, mainly as under:-
• a separate EGR passage, provided inside the intake manifold in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner;
• homogeneous mixture inside the cylinder ports; and
• avoids the external EGR setup from EGR valve to intake manifold, which results in reduce the packaging size and cost of additional components.
As indicated in the Figure 1 herein below for the inventive concept, the Intake Manifold (1) With Internal EGR Passage is provisioned preferably in the 3-Cylinder Combustion Engine to provide the uniform mixing of exhaust gases with fresh air inside the manifold runner in order to ensure the homogeneous mixture (Air + EGR) across the all three intake ports (Intake Port-1, Intake Port-2 and Intake Port-3) and to reduce the overall packaging size.
As per the Figure 1 The exhaust gases (2) coming from the EGR Valve, travels through the separate EGR passage (5) before reaching to the Mixing Chamber (3). The said Mixing Chamber (3) is so designed and positioned at the distal end of the said separate EGR passage (5), where it receives the incoming ambient fresh air (4). Thus the Mixing Chamber (3) is so provisioned that uniform intermixing of the exhaust gases (2) coming from the said passage (5) and the fresh air (4) occurs within said chamber (3). The homogeneous mixture (Air + EGR), of exhaust gases (2) and air (4), move further towards intake ports, preferably in the 3-Cylinder Engine, namely Intake Port-1, Intake Port-2 and Intake Port-3 towards recirculation. The separate EGR passage (5) is provided inside the intake manifold in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner. This will help to get the homogeneous mixture inside the cylinder ports. Such design of the Intake Manifold (1) With Internal EGR Passage (5) is also helpful to avoid the external EGR setup from EGR valve to intake manifold, which results in reduce the packaging size and cost of additional components.
The structural configuration of the Intake Manifold with Internal EGR Passage is so provisioned to get the homogeneous mixture inside the cylinder ports.
The structural configuration of the Intake Manifold (1) with Internal EGR Passage so provisioned to avoid the external EGR setup from EGR valve to intake manifold, and which results in reduce the packaging size and cost of additional components.
The most preferred embodiment of the said Intake Manifold with Internal EGR Passage, having the characteristic structural configuration and the architecture of the operation of different components involved in the functioning of said Intake Manifold With Internal EGR Passage are schematically depicted and illustrated in the Figures 2-4.
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-
,CLAIMS:WE CLAIM:

1. Intake Manifold (1) With Internal EGR Passage, to be applied preferably in the 3-Cylinder Engine, comprises an air-EGR Mixing chamber (3) and a separate EGR passage (5) inside the intake manifold (1) to provide the uniform mixing of exhaust gases (2) from EGR Valve with fresh air (4) inside the manifold runner in order to ensure the homogeneous mixture (Air + EGR) across the all three intake ports (namely (Intake Port-1, Intake Port-2 and Intake Port-3);
wherein said Intake Manifold (1) With Internal EGR Passage is characterized in:-
• a separate EGR passage (5), provided inside the intake manifold in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner;
• homogeneous mixture inside the cylinder ports; and
• avoiding the external EGR setup from EGR valve to intake manifold, which results in reduce the packaging size and cost of additional components.
2. The Intake Manifold With Internal EGR Passage, as claimed in the claim 1, wherein the characterizing structural configuration and the architecture of the operation of different components involved in the functioning of said Intake Manifold With Internal EGR Passage are schematically depicted and illustrated in the Figure 1, as under:-

Figure 1
3. The Intake Manifold with Internal EGR Passage, as claimed in claim 1 and 2, a separate EGR passage (5) is provided inside the intake manifold, particularly from the EGR Valve to the Mixing Chamber (3), in order to provide the uniform EGR mixing with the help of 180° reverse EGR flow to avoid the flow separation inside the runner.
4. The Intake Manifold with Internal EGR Passage, as claimed in claim 1 and 2, wherein said Mixing Chamber (3) is so designed and positioned at the distal end of the said separate EGR passage (5), where it receives the incoming ambient fresh air (4) and wherein said Mixing Chamber (3) is so provisioned that after uniform intermixing of the exhaust gases (2) coming from the said passage (5) and the fresh air (4) within said chamber (3) the homogeneous mixture (Air + EGR) moves towards intake ports of 3-Cylinder Engine.
5. The Intake Manifold with Internal EGR Passage, as claimed in claim 1 and 2, wherein it’s structure is so provisioned to get the homogeneous mixture (Air + EGR) inside the Engine’s cylinder ports, preferably 3-Cylinder Engine.
6. The Intake Manifold with Internal EGR Passage, as claimed in claim 1 and 2, wherein it’s structure is so provisioned to avoid the external EGR setup from EGR valve to intake manifold, and which results in reducing the packaging size and cost of additional components.
7. Intake Manifold With Internal EGR Passage, as claimed in the claim 1, wherein the most preferred embodiment of the said Intake Manifold with Internal EGR Passage, having the characteristic structural configuration and the architecture of the operation of different components involved in the functioning of said Intake Manifold With Internal EGR Passage are schematically depicted and illustrated in different views of the Figures 2-4, as under:-

FIGURE: 4 (Height- 95mm)