FORM 2
THE PATENT ACT 1970 (39 of 1970)
&
The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule l3)
1. TITLE OF INVENTION
A DEVICE FOR SEPARATING ONE AND BLOW- BY GASES IN TWO
CYLENDER DIESEL ENGINE

2. APPLICANT(S)
a) Name : FORCE MOTORS LIMITED
b) Nationality : INDIAN Company
c) Address : MUMBAI-PUNE ROAD,
AKURDI,
PUNE - 411 009
MAHARASHTRA
3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be Performed : -

Field of the Invention:
The present invention relates two cylinder common rail direct injection turbocharged intercooled engine. More particularly it relates to oil and blow-by gas separator being used in two cylinder diesel engines.
Prior Art:
An internal combustion engine typically includes a combustion chamber, where a fuel air mixture is burned to cause movement of a set of reciprocating pistons, and a crankcase, which contains the crankshaft driven by the pistons. During operation, it is normal for the engine to experience "blow-by," wherein combustion gases leak past the piston-cylinder gap from the combustion chamber and into the crankcase. These blow-by or crankcase gases contain moisture, acids and other undesired by-products of the combustion process.
Approximately 70% of blow by gases are unburned fuel (HC) that can dilute and contaminate the engine oil, cause corrosion to critical parts and contribute to sludge build up. At higher engine speeds, blow by gases increase crankcase pressure that can cause oil leakage from seals which are at the front and at the end of the crankshaft. An engine typically incorporates a Positive Crankcase Ventilation (PCV) which is used to remove these harmful gases from the crank case before damage occurs and combine them with the engine's normal incoming air/fuel charge in diesel or petrol engines respectively.
It is normal for crankcase blow-by gases to also include a very fine oil mist. The oil mist is carried by the PCV system to the manifold. The oil mist is then burned in the combustion chamber along with the air-fuel mixture. This results in an increase in oil consumption. A known method of removing oil from the crankcase gases is to use an oil separator.

The conventional oil separators include cyclonic separator, labyrinth and spiral separators. Some of them are discussed herein after:
US Pat. No. 6190543 discloses cyclonic separator for separating fluids of differing densities comprises a first chamber having a vortex finder and a core member. The vane is arranged co-axial with and adjacent the internal surface of the vortex finder to increase the rotational velocity component of fluids passing through the vortex finder by translating the axial velocity component of the fluids into a rotational velocity component.
US Pat. No. 6394182 discloses a separator for the bottom of an oil production well with a channel for the escape of gas which has the function of providing a free path for the flow of gas which might be trapped in the separating channel due to possible flooding in the region of the separation inlet.
US Pat. No. 7568475 discloses an oil separator element of the type that is used, for example, for the separation of oil from blow-by gases in internal combustion engines is disclosed. The oil separator element has a housing which forms a cavity through which the gas can flow. The housing has an interface which divides the oil separator element into two element halves. Each of the element halves has a groove family in the interface. The grooves of the two families thereby run at an angle to one another in the interface and at least some of the grooves intersect one another. In an oil separator element of this type, the air flowing through is set in rotational motion so that both on account of the centrifugal forces that occur as well as the impact of the oil mist or the oil droplets that are contained in the gas that is carrying the oil, these oil droplets or oil mist are separated on the walls of the grooves.
All aforesaid oil blow-by gas separators suffer from at least any one of the below mentioned deficiencies:

i. They have very complex structural design.
ii. They are very costly.
iii. They are difficult to install and maintain.
Hence it necessitates providing an improved oil separator which can obviates the aforesaid drawbacks associated with conventional oil separator.
Object of the Invention:
The main object of the present invention is to provide an improved oil blow-by gases separator that is more efficient than conventional separator in the removal of oil from crankcase blow-by gases.
Another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engines.
Another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engines which is simple in construction and maintenance free.
Another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engines which is compact and provides effective elimination of oil carry over.
Yet another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engines which is economic and easy to install.
Another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engines which reduces the oil consumption and lowers vehicle operating cost.

Another object of the invention is to provide a device for separating oil and blow-by gases in two cylinder diesel engine which improves reliability of engine and keeps engine compartments and components clean.
Summary of the Invention;
Accordingly to achieve the aforesaid objects the present invention provides a device for separating oil and blow-by gases in two cylinder diesel engine, the device comprising:
an encapsulated housing having one inlet and two outlets, the inlet receives oil and blow-by gases from the engine cylinder head cover, the first outlet provides path to dry blow-by gases which is at the top and second outlet provides path to separated oil towards the oil sump which is at the bottom;
a set of four labyrinths being placed parallel to each other and next to the inlet for providing path to oil and blow by gases that is received through the inlet;
a diaphragm being placed next to the labyrinths;
a oil deflector cap being placed next to the diaphragm for controlling the lift of the diaphragm and ensuring the complete dripping down of the oil towards the bottom outlet which is directed towards the oil sump; and
a restrictor being placed at the top outlet for providing path to the gases and restricting entry of oil towards a intake system of the engine.
An engine containing the aforementioned device and vehicle including such engine are also disclosed.

Brief Description of the Drawings:
Fig. 1 : Shows the side view of a device for separating oil and blow-by gases in two cylinder diesel engine in accordance to present invention.
Fig. 2 : Shows the top view of a device for separating oil and blow-by gases in two cylinder diesel engine in accordance to present invention.
Fig. 3 Shows the sectional view of a device for separating oil and blow-by gases in two cylinder diesel engine in accordance to present invention.
Detailed Description of the Drawings:
The features, nature, and advantages of the disclosed subject matter will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference numerals identify correspondingly throughout.
The meaning of reference numerals used in the drawings:
10 : Device for oil and blow-by gases separation
20 : Encapsulated housing
21 : Inlet
22 : Outlet at the top for fumes
23 : Outlet at the bottom for oil drain
30 : Labyrinths
40 : Diaphragm
50 : Oil deflector cap
60 : Restrictor
70 : Passage for oil and blow-by gases entry to the device
80 : Oil and blow-by gases

Referring to figures 1 to 3, the device (10) for separating oil and blow-by gases in two cylinder diesel engine in accordance to present invention includes an encapsulated housing (20), labyrinths (30), a diaphragm (40), an oil deflector cap (50) and restrictor (60).
The encapsulated housing (20) includes one inlet (21) and two outlets (22, 23). The inlet receives oil and blow by gases (80). The oil and blow by gases (80) are reached to the inlet (21) through a passage (70). The passage (70) includes a pipeline structure for carrying out the oil and blow by gases (80) towards the inlet (21) of the encapsulated housing (20). One of the outlets (22) provides path to blow by gases and other outlet (23) provides path to oil drain towards the oil sump. The encapsulated body (20) is mainly made of plastic moulding.
The labyrinths (30) are situated next to the inlet (21). The oil and blow by gases (80) that is received through the inlet are passes through the way provided by the labyrinths. The labyrinths (30) are kept parallel to each other so that they provide a channel for passing of the oil and blow by gases (80). The labyrinths (30) are made of plastic molding.
At the outgoing end of the channel formed by labyrinths (30) a diaphragm (40) is provided. Preferably diaphragm (40) is made of rubber material. Diaphragm of other material can also be used.
The oil deflector cap (50) is placed next to the diaphragm (40) for controlling the lift of the diaphragm (40) and ensuring the complete dripping down of the oil towards the outlet (23) for the oil drain to the oil sump. The oil deflector cap (50) can be made of pressed sheet metal or by plastic molding. When the blow by gases and oil reach the encapsulated housing (20), due to positive crankcase pressure the diaphragm (40) opens up, allowing the blow-by gases to escape out radially towards the oil deflector cap (50) and wall of the encapsulated housing. Oil is made to drip down the housing (20) and gets collected near the outlet (23) at the bottom of the housing

(20) and is been directed to the oil sump. What remain there are the gases (mainly dry fumes) which are directed back to the intake system of the engine through outlet (22).
The restrictor (60) is placed at the outlet (22) for providing path to the blow-by gases and restricting entry of any oil that is left, towards the intake system of the engine. The restrictor (60) includes a plate with small opening.
The device of present invention provides the effective separation of blow-by gases and oil from the two cylinder symmetric firing diesel engine, before it is been recirculated back in to the intake manifold.
Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description is to be construed as illustrative only and is for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as the presently preferred embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described herein without departing from the spirit and scope of the invention as described in the following claims.

WE CLAIM:
1. A device for separating oil and blow-by gases in two cylinder diesel engine,
the device comprising:
an encapsulated housing having one inlet and two outlets, the inlet receives oil and blow by gases, the first outlet provides path to dry blow-by gases and second outlet provides path to oil drain towards the oil sump;
a set of four labyrinths being placed parallel to each other and next to the inlet for providing path to oil and blow by gases that is received through the inlet;
a diaphragm being placed next to the labyrinths;
a oil deflector cap being placed next to the diaphragm for controlling the lift of the diaphragm and ensuring the complete dripping down of the oil towards oil sump; and
a restrictor being placed at the first outlet for providing path to the gases and restricting entry of oil towards a intake system of the engine.
2. The device as claimed in claim 1 further comprising a passage for causing travel of blow by gases and oil from a tappet cover of the engine to the inlet of the encapsulated housing.
3. The device as claimed in claim 1 wherein a restrictor includes a plate having a small orifice.
4. The device as claimed in claim 1 wherein blow by gases includes dry fumes.

5. A two cylinder diesel engine comprising a device as claimed in any one of the claims 1 to 4,
6. A vehicle comprising a two cylinder diesel engine, wherein the engine comprising a device as claimed in any one of the claims 1 to 4.
7. A device for separating oil and blow-by gases in two cylinder diesel engine such as herein before described and illustrated with reference to accompanying drawings.