six stroke engine working

8/20/2019 Six Stroke Engine working

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SIX STROKE ENGINES

VELOZETA MODEL


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IntroductionTwo different approaches of six stroke engines

First approach

There is two additional strokes by the main piston asfifth and sixth stroke

Second approach

It uses a second opposed piston which moves at half

the cyclical rate of the main piston


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istor! o" si# stro$e en%ines First &ate%or!

1. Griffin six stroke engine 2. Baula! six stroke engine

". #rower six stroke engine

$. %elo!eta six stroke engine

Second &ate%or!

1. Beare head six stroke engine

2. #harge pump engine


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Ve'o(eta)s si# stro$e en%ine & four stroke 'onda engine is altered to form the six

stroke engine

(irst four strokes are same as a conventional four stroke

engine

In the fifth stroke) air is sucked in to the cylinder

In the sixth stroke) a mixture of air and unburned gases

leaves out.


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En%ine parts *odi"ied +, &a*sha"t - &ran$sha"t Sproc$ets./

#rankhas 1*+* degrees of rotation for ",* rotation of

camshaft

'ence their corresponding sprockets are having teeth

ratio "-1

"$ teeth sprocket of camshaft in the four stroke isreplaced by $2 teeth sprocket

1 teeth crankshaft sprocket is replaced by 1$ teeth

sprocket


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0,&a* 'o1es./

",* degrees of cam has divided into ,* degreesamong six strokes

Inlet valve is opened in the first stroke only and

the exhaust valve) in the fourth) fifth and sixth

strokes by the exhaust valve cam.

The exhaust valve cam is double lobed


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2,Va'3e Ti*in%./

I%/ at * degree at T0#

I%# at 2 degree after B0#

%/ at * degree at B0# which was 2 degree before

B0# in the original engine

%# at 1* degree before T0#

&ir inlet reed valve is opened in the fifth

stroke and then for the sixth stroke exhaust

valve is opened


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4,Secondar! Air Induction S!ste*./

It supplies air which is used in the fifth and sixth

stroke 0uring the fifth stroke air is sucked into the

cylinder through a reed valve provided on the

secondary air induction line

In the sixth stroke a second reed valve at theexhaust manifold opens and removes the mixture of

air and unburned gases


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5or$in% o" the en%ineFirst stroke:- 0uring the first stroke the inlet valve 3,4 opensand air5fuel mixture from carburetor is sucked into the cylinder

through the inlet manifold 324.


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Second stroke:-

0uring the second stroke) piston moves from B0# to T0#) both the

inlet valve 3,4 and exhaust valve 3114 are closed and the air5fuel mixture is

compressed. The compression ratio of the modified engine is same as that of

the original four stroke 'onda engine 6-1.

Third stroke:-

0uring the third stroke) power is obtained from the engine by igniting

the compressed air5 fuel mixture using a spark plug 31$4. Both valves remain

closed. 7iston moves from T0# to B0#.


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Fourth stroke:-

0uring the fourth stroke) the exhaust valve 3114 and the reed valve

32"4 opens to remove the burned gases from the engine cylinder. 7iston moves

from B0# to T0#.

Fifth stroke:-0uring the fifth stroke) the exhaust valve 3114 remains open and the

reed valve 32"4 closes. (resh air from the air filter 32$4 enters the cylinder

through the secondary air induction line 3214 provided at the exhaust manifold

31"4. The reed valve 3224 opens.

Sixth stroke:-

0uring the sixth stroke) the exhaust valve 3114 remains open. The air

sucked into the cylinder during the fifth stroke is removed to the atmosphere

through the exhaust manifold 31"4. The reed valve 32"4 opens and the reed valve

3224 closes.


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6AFFLES


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7er"or*ance test resu'ts+,Load Test Resu'ts./


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0,7o''usion Test Resu'ts./


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Graphs./ B.P Vs TFC and SFC at 320 rpm


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B.P Vs TFC and SFC at 320 rpm


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Ad3anta%esReduction in fuel consumptionReduction in pollution normally up to 65%Better scavenging and more extraction of

work per cycleLower engine temperature - easy to maintainthe optimum engine temperature level forbetter performance

he engine does!t re"uire any basicmodi#cation to the existing engines$ lltechnological experience and productionmethods remain unaltered&igher overall e'ciency


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&onc'usion The six stroke engine modification promises

dramatic reduction of pollution and fuel consumption of aninternal combustion engine. The fuel efficiency of the

engine can be increased and also the valve timing can beeffectively arranged to extract more work per cycle. Betterscavenging is possible as air intake occurs during the fifthstroke and the exhaust during the sixth stroke. 0ue to moreair intake) the cooling system is improved. It enables lowerengine temperature and therefore increases in the overallefficiency.


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six stroke engine working

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