FORM 2
THE PATENTS ACT 1970
(39 of 1970)
AND
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rulel3)
1. TITLE OF THE INVENTION:
"AIR INTAKE SYSTEM WITH INTEGRATED AIR CLEANER"
2. APPLICANT:
(a) NAME: MAHINDRA & MAHINDRA LIMITED
(b) NATIONALITY: Indian Company incorporated under the
Companies Act, 1956
(c) ADDRESS: Gateway Building, Apolto Bunder, Mumbai - 400001,
Maharashtra, India
3. PREAMBLE TO THE DESCRIPTION:
The following specification describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION:
The present invention relates to an air intake system for internal combustion engine, and more particularly, to a non-metallic intake manifold having integrated with air filtering unit for inducting purified air into combustion chamber for efficient performance of engine and doing away with the need of a conventional air cleaner.
BACKGROUND OF THE INVENTION:
The air intake system for internal combustion engines generally includes an air cleaner, intake manifold and a conduit for connecting the air cleaner and intake manifold. The air cleaner receives ambient air from atmosphere and filter the air with the help of air filtering unit such as wire mesh combinations or varied configurations of paper or synthetic media. Then, the cleaned air exits the air cleaner and passes through the conduit to the intake manifold and then goes to engine cylinder for operation thereof. Generally, internal combustion engines are used for diverse applications and depend on use, engines are being provided with other related components such as throttle body, electronic valve timing, variable valve timing and others.
This conventional air intake system constitute more number of parts and require more space to accommodate within the limited space of engine compartment provided for applications like vehicles, telecommunication and other applications. This also includes design of more number of parts and manufacturing thereof. Also, this may further leads to more time consumption in assembling the entire components and fit in the engine compartment and serviceability thereof. Hence, there was a necessary to develop a simple air intake system having intake manifold made of plastic material and integrated with an air filtering unit so as to accommodate the air intake system within the allotted space and achieve complexity reduction by way of less number of parts and cost effective design.
There have been inventions in the field of air induction system having integrated intake manifold, air cleaner and other related engine components as per the requirement and applications of those may be performing according to the intended objectives, but to meet the objective and requirement, we had to develop the present invention: detail description and other related objectives are as set forth below.

Some of the prior patents are being described below with its shortcomings and disadvantages which can be overcome by the present invention.
US Patent 20040074466 discloses an Integrates Intake Manifold and Air Cleaner for Engine without Throttle Body, which clearly mentions that the invention described therein is not at all applicable to engine having throttle body. Also, the invention provides runners for carrying the filtered air and an additional mounting member for connecting the runners with engine cylinder block for air passage ways. This leads to more number of components and needless manufacturing thereof and further leads to additional material and high cost.
US Patent 20040031460 discloses an assembly of air cleaner, valve cover and intake manifold as a single unit. In this invention, air cleaner is positioned directly between the intake manifold and valve cover to provide a compact induction module. Air cleaner is the main part out of these three parts requires frequent service. Hence, the particular position of the air cleaner may cause dismantling of other components for its servicing, which will also lead to more time consumption in servicing entire intake system of engine.
While aforementioned prior patent documents performs in accordance with their intended objectives and requirements, there is a need exist to develop a cost effective and compact integrated air intake system to meet our objectives and also to take care of the shortcomings and disadvantages of the said prior arts thereby to develop a better system over the prior arts. According to the present invention, by way of integration of air intake manifold and air filtering unit, conventional usage of more number of components required to develop a single air filter is getting eliminated, thereby assembly time getting reduced and further leads to less complexity in designing and manufacturing the parts.
OBJECTIVE OF THE INVENTION:
The present invention overcomes the shortcomings associated with the background art and achieves other advantages not realized by the background art.

The main object of the present invention is to provide an integrated air intake system having an intake manifold integrated with air filtering unit, for internal combustion engines in use with off-road vehicles such as tractors and telecommunication applications.
Another object of the present invention is to provide an integrated air intake system having intake manifold made of non-metallic / plastic material integrated with air filtering unit of various combinations of filtering media for cleaning ambient air that enters the intake manifold.
Yet another object of the present invention is to provide an integrated air intake system of compact size so as to comfortably dispose (package) the intake system within the limited space of engine compartment allotted for diverse applications.
Yet another object of the present invention is to provide an intake manifold having made with non-metallic / plastic material such as Minion having high melting point of about 240°C, in order to withstand high temperature generated by engine during running.
Yet another object of the present invention is to provide an integrated air intake system which can be used with engine of different ranges of Horse Power (HP) value by changing volume of the intake manifold according to the stoichiometric ratio suitable for that particular HP/power of engine.
Yet another object of the present invention is to provide an integrated air intake system with simple design without compromising the engine performance.
Yet another object of the present invention is to provide an integrated air intake system having a single pressure drop thereby to ensure maximum amount of air induction into the combustion chamber unlike conventional air induction systems.
Yet another object of the present invention is to reduce the assembly time for assembly of the air intake system with the internal combustion engine.

Yet another object of the present invention is to provide an integrated air intake system having less/minimal number of parts for complexity reduction in the air intake system.
Yet another object of the present invention is to provide a cost effective integrated air intake system by way of simple design, compact size, less number of parts and less manufacturing cost.
Yet another object of the present invention is to provide an integrated air intake system that is easily serviceable in least possible time and without disturbing other related components of the system.
Yet another object of the present invention is to provide an integrated air intake system combining functions of air intake manifold and air cleaner thereby to do away with inventory of one component, and which is compact in size thereby needing/occupying less storage area compared to the conventional air intake system for engine.
In accordance with one aspect of the present invention, integrated air intake system comprising;
an air intake manifold made of non-metallic / plastic material and an air filtering unit having various configuration(s) and combination(s) of filters which are fabricated from paper or synthetic media, wherein said air intake manifold comprises of a first member and second member connected with each other for easy assembly of said air filtering unit and easy serviceability, wherein volume of the second member is maintained at 80 percentage of the engine cubic capacity (volume in cubic centimeters) for efficient induction of air into the combustion chamber, wherein said air filtering unit comprises a first filtering means of low density and a second filtering means of high density for effective air-cleaning and inducting maximum amount of ambient air without compromising the effectiveness of air filtering unit and engine performance, and guiding means provided at inlet for guided air entry into said air intake manifold for diverting the air flow to entire surface area of said first filtering means.

Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
BRIEFDESCRIPTIONOF THE DRAWINGS:
The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:
FIG. 1 is the assembled view of the integrated air intake system with respect to the engine.
FIG. 2 is the cross sectional view of the present invention with referring to FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT:
In the following, the preferred embodiment of the present invention is being described with reference to the drawings.
In an embodiment, the invention provides an integrated air intake system (1) comprising an air intake manifold (14) incorporated with an air filtering unit (5). The intake manifold (14) comprises a first member (6) and a second member (7) removably connected with each other. The first member (6) and said filtering unit (5) define a first volume (16) for effective induction of ambient air into the air intake system (1) and said second member (7) and said filtering unit (5) define a second volume (17) for effective induction of purified air into the combustion chamber. The air filtering unit (5) comprises a first filtering means (8) and a second filtering means (9) that are cohesively and removably disposed in the intake manifold (14) wherein said first filtering means (8) is low density filter means and said second filtering means (9) is high density filter means.

Referring to FIG.l & FIG.2, the preferred embodiment of the present invention describes an integrated air intake system, for use with internal combustion engines employed for vehicles having applications where less speed and more torque required to perform its function and for telecommunication application where it is required to give constant speed to drive the generator is specified with numeral 1. The integrated air intake systemlcomprises an air intake manifold 14 and an air filtering unit 5.The air intake manifold consists of a first member 6 and a second member 7 and the bottom perimeter of first member 6 and top perimeter of second member 7 is provided with flanges 15 for connecting said first member 6 and second member 7 each other with the help of connecting means such as bolts or like. The intake manifold is made of plastic material such as Minion which is being adapted to use with engine to withstand high temperature generated by the engine due to its high melting point of 240 degree Celsius. Top end of the first member 6 is provided with an inlet 12at the center thereof and connected with a conduit 18 thereto for adaptably receiving the ambient air from the atmosphere. Optionally open end of said conduit 18 is made in such way to receive an air precleaner, which will be utilized to increase the effectiveness of air purification while operating at highly dusty environment. Bottom perimeter of said second member 7 is also provided with a flange adapted to mount on the engine cylinder block (not shown)..
The air filtering unit 5 comprises of various configurations and combinations of air filtering medias such as paper and synthetic material. It is understandable that a person skilled in the art can make use of any combinations of filtering medias as per the requirement of the engine performance. With referring to FIG.2, according to the preferred embodiment of the present invention said air filtering unit comprises of first filtering means 8 and second filtering means 9 wherein said first filtering means 8 is fabricated from paper media with low density in panel configuration and second filtering means 9 is fabricated from paper media with high density in panel configuration. This particular combination of the first filtering means 8 and second filtering means 9 will ensure less pressure drop inside said air intake manifold 14 and effective purification of atmospheric air.
The second member 7 is provided with a supporting means 3 for supporting second holding means 11 and first member 6 is adapted to support first holding means 10 for

holding said first filtering means 8 and second filtering means 9 wherein first filtering means 8 is positioned on top of the second filtering means 9 as shown in FIG.2.As such, the first member 6 and the first filtering means 8 define a first volume 16 for effective induction of the ambient air into the air intake system 1 and the second member 7 and the second filtering means 9 define a second volume 17 which is being maintained for 80 percentage of the engine cubic centimeter value for effective induction of air into the combustion chamber. Accordingly, the air intake manifold is being designed for different HP ranges of engine.
A guiding means 13 is disposed at the inlet 12 of the first member 6 for diverting the air flow throughout the volume of the first member 6 thereby to improve the effectiveness of air purification. An indicator 2 is disposed on the bottom of the second member 7 to indicate the pressure drop to the operator visually so that the operator is aware of the change in performance of said air filtering unit 5 and thereupon for taking further step in serviceability of the air filtering unit accordingly.
The method of working of the present invention will be described in detail with referring to the constructional details of the preferred embodiment described above and with referring to FIG. 1 & FIG.2, In accordance with preferred embodiment, the ambient air enter into the first volume 16 via said conduit 18 and diverted to entire surface area of the first filtering means 8 with the help of guiding means 13 which will otherwise cause ambient air to flow through specific area which will further leads to deficiency in the performance of the air filtering unit 5 and frequent servicing of air intake system. The ambient air then pass through first filtering means 8, since it is very less dense in nature flow rate of the ambient air through said first filtering means 8 will be high with less pressure drop, but at the same time the air carry some fine particles with it. When this air passes through the second filtering means 9, because of its high density, remaining particles get filtered out. With this combination of filters according to the present invention, pressure drop can be reduced unlike conventional air intake system thereby maximum amount of air can be inducted into the combustion chamber without compromising the efficiency of air intake system and engine performance. Thus completely purified ambient air inducted into combustion chamber for functioning of internal combustion engine.

We Claims,
1. An integrated air intake system (I) comprising an air intake manifold (14)
incorporated with an air filtering unit (5) wherein,
said intake manifold (14) comprises a first member (6) and a second member (7) removably connected with each other;
said air filtering unit (5) comprises a first filtering means (8) and a second filtering means (9) that are cohesively and removably disposed in the intake manifold (14) wherein said first filtering means (8) is low density filter means and said second filtering means (9) is high density filter means;
said first member (6) and said filtering unit (5) define a first volume (16) for effective induction of ambient air into the air intake system (1) and said second member (7) and said filtering unit (5) define a second volume (17) for effective induction of purified air into the combustion chamber.
2. An integrated air intake system as claimed in claims 1 wherein, the first filtering means (8) is placed on top of second filtering means (9) ensuring less pressure drop inside the enclosing intake manifold (14) thereby leading to optimum efficiency of air induction of the said air intake system.
3. An integrated air intake system as claimed in claim 1 wherein, the bottom perimeter of first member (6) and top perimeter of the second member (7) are provided with flanges (15) to connect said two members.
4. An integrated air intake system as claimed in claim 3 wherein, first member (6) is adapted to support first holding means (10) that holds first filtering means (8).

5. An integrated air intake system as claimed in claim 4 wherein, the first member (6) further comprises a guiding means (13) disposed at inlet (12) that receives ambient air through a conduit (18) connected thereto.
6. An integrated air intake system as claimed in claim 5 wherein, the guiding means (13) facilitate the air flow uniformly over filtering means (8 and 9) of first member (6) thereby improving effectiveness of the air purification operation.
7. An integrated air intake system as claimed in claim 3 wherein, second member (7) is provided with supporting means (3) to support second holding means (11) to hold second filtering means (9).
8. An integrated air intake system as claimed in any of the claims above wherein, an indicator is disposed on bottom of second member (7) to indicate drop in pressure thus performance of the filtering unit (5) thereby providing a warning of maintenance and serviceability.