3. PREAMBLE TO THE DESCRIPTION

a. Background:
Indiscriminate extraction and lavish consumption of fossil fuels have led to reduction in underground-based carbon resources. The sky rocketing of petroleum fuel costs exert enormous pressure on our resources and seriously affect our economy. Due to the increase in the demand and scarcity in the availability of the fossil fuels, it's essential to search for the alternate fuels. Bio- diesel is attracting considerable interest as an alternative fuel for diesel engines. A major problem faced in bio-diesel fuelled engines due to the increased viscosity & low volatility of bio-diesels is causing severe engine deposits, piston ring sticking, and injector coking The innovativeness is required to modify the engine design to use the existing bio-diesel very efficiently.

This present invention relates to modification of engine design, for inducing turbulence to improve the combustibility of combustible mixture. The rotating blades are provided in the piston cavity which is partially rotated by the mechanism provided underneath driven by the small end of connecting rod. The rotating blades induce turbulence in the fuel-air charge and improve mixing efficiency of the combustible mixture which enhances overall efficiency of the diesel engines.

b. Description of Related Art:

The requirement of modem diesel engine is to produce more power and improved thermal efficiency with the economic fuel consumption while meeting the strict emission requirement. Alternative methods were tried to achieve this.

US Patent 6237579 discloses groove theory in which grooves or channels are cut on the inner surface of the cylinder head to enhance the turbulence in the combustion chamber. The out come of this was to improve combustion phenomenon for better power out put with reduced emissions.

US patent 3,943,900 discloses a method which incorporates a flat plate like member to be bolted to an intake manifold below a carburetor. The apparatus injects air at appoint in the manifold to improve fuel performance of the engine

US patent 4,559,911 discloses a modification in diesel engine to improve the combustion. In this passages to pre combustion chamber are filled with pellets fabricated of a porous material, coated with catalytic material to facilitate more complete combustion.

US patent 6,044,812 revels a modification of the exhaust valve of a two cycle diesel engine in order to increase the amount of the valve stem travel and hence larger annular opening which permit longer power stroke. This increases the scavenging by allowing more air for combustion. These references have no teaching about to enhancement of combustibility of combustible mixture in diesel engine combustion through the dynamic action with in the main combustion chamber.

c. Summary of invention:
The present invention is a way of producing turbulence in air-fuel mixture in the combustion chamber of diesel engine. A circular plate, welded with blades on its top surface, is mounted on the top of piston and a fitment mechanism is used so that this circular plate (rotating piston blade) rotates partially when the piston makes upward and downward motion during its operation. This partial rotation of these blades creates turbulence, thereby, improving combustion rate and hence thermal efficiency.

4. DESCRIPTION
According to the present invention, a rotating blade piston is constructed using the method described further in this paragraph (Fig 1). A hole (2) is drilled at the centre of the combustion bowl (10) throughout the crown portion (1) in which extended rod bottom lock plate (6) is inserted; blades (5) are welded to the top side of upper supportive plate (4) and bottom side of the same plate is, in turn, welded to extended rod (3), other end of extended rod is welded to bottom lock plate (6). Small end of connecting rod (9) has a pivot pin (8), which is inserted into slot (7) provided, in the bottom plate. The oscillatory motion of the connecting rod will get converted into partial rotary motion of the upper plate (4).

In a slider crank mechanism (as in automotive engines), the reciprocating motion of the piston is converted to rotary motion of the crank shaft through connecting rod, which executes an oscillatory motion about the longitudinal axis of the engine. This oscillatory motion of the connecting rod is used to rotate the blades (5) through a pivot pin (8) on the small end of the connecting rod. Thus the blades rotate through 60 to 80 degrees, which will induce turbulence in fuel-air mixture to increase the combustibility of the combustible mixture to achieve the target of improved thermal efficiency with the economic fuel consumption.

BRIEF DESCRIPTION OF THE DRAWING

Modification of piston, referred in this invention, is disclosed in the following description with the help of these accompanying drawings, wherein:

FIG. 1 is a modified piston with connecting rod assembly.

FIG. 2 is an exploded view of modified piston-connecting rod assembly.

FIG. 3 is a cross-sectional front view of modified piston-connecting rod assembly.

FIG. 4 is a top view modified piston.

DETAILED DESCRIPTION OF THE INVENTION

Further, this invention is described with reference to the accompanying drawings (Fig-1, Fig-2, Fig-3 and Fig-4).

FIG. 1 shows the modified piston (Rotating blade piston), the product of present invention, is suitable for use in diesel engine. The piston (1) is made up an aluminum alloy.

FIG. 2 and FIG.3 give details of individual parts and how they assembled. The piston body (1) includes a through hole (2) at centre of the cavity, through which extended rod (3) inserted. One side of the extended rod (3) is welded to the bottom lock plate (6). A slot (7) is provided on bottom plate (6). Top side of the extended rod (3) is welded to upper supportive plate (4) in the piston cavity. Pivot pin (8) is provided at top of smaller end of connecting rod (9).

FIG. 4 shows blades (5) which are welded to upper supportive plate (4). These three blades are at an angle of 120° between them.

This modification will help m using various bio-diesels for better combustion as vehicular fuel. Further, it can achieve higher fuel economy and ensure controlled emissions. No additional maintenance is required to operate the engine with the present design modification of the piston. The target beneficiaries from this invention are Industry and Society.

5. CLAIMS

We claim that

1. The invention, referred to as 'Rotating blade piston', is a modification of piston for improving combustion of fuel by introducing turbulence in fuel-air mixture in the combustion chamber of a diesel engine and this modification comprises of fitment of circular plate (Rotating blade piston), with blades welded on this plate, on top side of piston and that a fitment mechanism is used such that these blades partially rotate during upward and downward motion of piston during the operation of the diesel engine, thereby, introduce turbulence, and hence improve combustion rate (as shown in fig-1).

2. The circular plate, referred in claim(l is a metallic disk on the top of which three blades are welded at a mutual angle of 120 deg (as shown in fig-4) and the bottom of disk is welded to an extension rod (as shown in fig-2)

3. The Fitment mechanism referred in claim (1 )means that - (a) a hole is drilled on the top of the piston so that an the extension rod, welded to bottom surface of circular plate, passes through the hole and (b) lower end of the extension rod is welded to the bottom lock plate(as shown in fig-2 and fig-3)

4. Further the mechanism, referred in claim (1), also includes providing a keyway slot in the bottom plate and pivot pin in upper end of the piston so that they are properly linked.

5. Further the mechanism, referred in claims (1), (2) an (3), in conjunction, will generate partial rotatory motion of circular plate (and hence of blades), thereby, creating turbulence of air- mixture in the combustion chamber resulting in better combustion of the fuel, and hence, improved efficiency.

This invention (modification of piston), referred in claim (1) will help in improving efficiency, during use of various bio-diesels as fuel.