THEORY OF SIX STROKE ENGINE WITH TWO EXTERNAL … · THEORY OF SIX STROKE ENGINE WITH TWO EXTERNAL ELECTRIC STROKE 1 Abstract The six-stroke engine is a advance version of internal

THEORY OF SIX STROKE ENGINE WITH TWO EXTERNAL ELECTRIC STROKE

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Abstract

The six-stroke engine is a advance version of internal combustion engine based on the four-stroke engine, but with additional two electric stroke intended to make it more efficient and reduce emissions. It uses fresh air for the second suction (clean air from atmosphere ) the fifth stroke. It has a wide range of uses in Automobiles, heavy goods, construction-site and farm vehicles, Motor boats, motor-pumps, generator sets, stationary engines, etc. intended for agriculture and industry applications. Here we are introducing a new and simplest method which is capable for mass producing these engines. This is done by altering an ordinary 4 valve 4 stroke petrol engine. The working of our engine is as follows: - 1st: suction stroke, 2nd: compression stroke, 3rd: power stroke, 4th: exhaust stroke, 5th: 2nd suction stroke where fresh air is sucked, 6th: exhaust stroke. The main changes are in design of camshaft, sprocket, and rocker arm additional electric motor. The engine used is a Bajaj pulsar 135 ls engine. Six stroke engines have a very high relevance now a days. It helps Reduction in fuel consumption, Reduction in pollution, better performance and more extraction of work/cycle higher overall efficiency and ecofriendly.

Key word used: Electric motor, camshaft, rocker arms


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INTRODUCTION

The invention relates to six stroke engines conventionally four stroke engines are used in variety of automobile applications. The efficiency of the engine can be improved by making the crankshaft to rotate three times in one cycle This can be achieved by adding two another electric power strokes. There are two kinds of system explained in this specification. 1. Six stroke 2 valve system ( ) 2. Six stroke 4 valve system ( )

SIX STROKE 4 VALVE SYSTEM

The machine is an advanced version of the existing 4 stroke engine. Generally in 4 stroke engine 1 power stroke crank moves twice. In this newly developed machine there are 6 strokes. In 1 fuel power stroke and 1 electric power stroke, crank rotate 3 times, this is achieved by providing two additional stroke i.e. air intake and air exhaust. For this additionally two more valves are provided. In a 4 stroke engine 1600 RPM are exactly 800 power stroke are required, whereas in 6 stroke engine only 533.33 power strokes are required to achieve 1600 RPM. In this 6 stroke engine crank shaft rotate 1080 degree, and cam shaft rotate 360 degrees. Camshaft is set at 60 degree in each stroke , whereas in 4 stroke engine it is set at 90 degree from this approximately 50% of fuel can be saved. developed and patented by ATHAR KHAN, of ROORKEE India, in 2015

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NEED TO DEVOLOPE SIX STROKE ENGINE

The necessity to developed six stroke engine is to increase the efficiency of the internal combustion engine. The disadvantage of the four-stroke cycle is that only half as many power strokes are 2 completed per revolution of the crankshaft as in the two-stroke cycle and only half as much power would be expected from an engine of given size at a given operating speed. The four-stroke cycle, however, provides more positive scavenging and charging of the cylinders with less loss of fresh charge to the exhaust than the two-stroke cycle. However we want to developed the six stoke engine that can be free from the entire problem of two stroke four stroke engine.

PRINCIPLE OF SIX STROKE ENGINE

A six stroke engine describes a number of different approaches in the internal combustion engine to use electric Power an additional power and exhaust stroke of the piston. The six stroke engine has 2 power strokes, one fuel, one electric. The rapid electric power during the fifth stroke is similar to the combustion of the gasoline. the added strokes effectively reduce fuel consumption, and therefore emissions, without significantly compromising on power. ABOUT THE SIX STROKE ENGINE Internal combustion engine has been modified with the goal of higher efficiency. It is increases the efficiency through the extra power by fifth electric stroke. The big advantages is that, we have got in six stroke engine, the electric power created the power in fifth stroke, and power has to be generated in the fifth stroke Due to electric power. The six stroke air is further used for


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different of applications making the engine lighter and giving 50% increased efficiency. The six stroke engine has consist of the six processes of cycles


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WORKING

FIRST STROKE (SUCTION STROKE) During the first stroke the Inlet valves opens and air- fuel mixture from carburetor is sucked into the cylinder through the inlet valve and piston moves from TDC to BDC which results in the formation of a pressure difference due to which pure air enters the cylinder.

Second stroke: During the second stroke, piston moves from bdc to tdc, both the inlet valves and exhaust valves are closed and the air-fuel mixture is compressed. The compression ratio of the modified engine is same as that of the original four stroke engine

Third stroke (first power stroke) During the third stroke, power is obtained from the engine by igniting the compressed air- fuel mixture using a spark plug. Both valves remain closed. Piston moves from TDC to BDC. Now we can simply says the combustion chamber valve opens and gases of combustion enter the cylinder.

FOURTH STROKE (EXHAUST STROKE) During the fourth stroke,

the exhaust valve opens to remove the burned gases and the exhaust gases are removed via this valve. From the engine cylinder Piston moves from BDC to TDC.


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Fifth stroke(SECOND power stroke) — During the fifth stroke, the second suction valve opens. Fresh air from the air filter enters in the cylinder through the secondary air induction line. Here the first inlet valve and both exhaust valves are in closed position.

Sixth stroke — During the sixth stroke, the secondary exhaust valve opens. The air sucked into the cylinder during the fifth stroke is removed to the atmosphere through the exhaust manifold. Here the both inlet valves and first exhaust valve are in closed position


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5 MODIFICATIONS IN SIX STROKE ENGINE

ENGINE PARTS MODIFIED In order to modify a 4 stroke engine to a 6 stroke engine we needed a 4 valve engine. Since these valve are independently activated at different times. So we took pulsar 135 model engine for our study and modification. First we have designed the complete engine model

Camshaft / crankshaft sprockets In the six stroke engine the crankshaft has

1080 degrees of rotation for 360 degree rotation of the camshaft per cycle. Hence their corresponding sprockets are having teeth in the ratio 3:1. In the original four stroke engine the teeth of the sprockets of the crankshaft and the camshaft were in 2:1 ratio. The 32 teeth sprocket of the four stroke engine camshaft was


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replaced by a 48 teeth sprocket in the six stroke engine. The crankshaft sprockets with 16 teeth remained as such.

Cam lobes/ camshaft - In the six stroke engine the 360 degrees of the cam

has been divided into 60 degrees among the six strokes. New two lobes are to be further added to the existing camshaft. Thus a two lobed camshaft is changed to new four lobed camshaft. This four lobes open the valves at different timings. Out of the four lobes two lobes are for suction valves and two for exhaust valves


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Rocker arms

New rocker arms has been designed using trial and error method. Their main aim is to activate the valve opening by the action of the camshaft. Four different types of same size were made. The basic sizes remains the same.


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Electric motor: we use an electric power for fifth stroke(air intake) and six

stroke (final air exhaust stroke) as additional power In six stroke cycle. The duty cycle of motor is 1/3 part of full cycle. Motor is controlled by timing switch. As per engine requirement motor can be used (12 v/24 v/36 v/48 v and etc.)

timing switch

Timing switch is attaché on camshaft. its used to control the motor and on/off condition of switch is 120 degree (on) and 240 degree(off) as per camshaft ,360 degree (on) and 720 degree (off) as per crankshaft.

ELECTRIC MOTOR


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TIMING SWITCH CAMSHAFT


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CONCLUSIONS

The six stroke engine modification and reduction of pollution and fuel consumption of an internal combustion engine. The fuel efficiency of the engine can be increased and also the valve timing can be effectively arranged to extract more work per cycle. Better scavenging is possible as air intake occurs during the fifth stroke and the exhaust during the sixth stroke. Due to more air intake, the cooling system is improved. It enables lower engine temperature and therefore increases in the overall efficiency. One of the Advantage is that it doesn't require any basic modification to the existing engines. All technological experience and production methods remain unaltered. It can be used in Automobiles, heavy goods, Motorboats motor-pumps, generator sets, stationary engines, etc....intended for agriculture and industry. Our six stroke engine claims a powerful engine with reduction in specific fuel consumption and total fuel consumption. It engine is pollution free engine as literally saying no CO2 is produced. Better cooling than the 4 stroke engine. The future scope within this project is to collect the air of six stroke can be store in air tank and can be use further

1 breaking system

2 can return to first stroke


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REMARKS

THEORY OF SIX STROKE ENGINE WITH TWO EXTERNAL … · THEORY OF SIX STROKE ENGINE WITH TWO EXTERNAL ELECTRIC STROKE 1 Abstract The six-stroke engine is a advance version of internal

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