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SIX STROKE ENGINE:

SIX STROKE ENGINE

The six-stroke engine is a type of internal combustion engine based on the four-stroke engine, but with additional complexity to make it more efficient and reduce emissions. Two different types of six-stroke engine have been developed since the 1990.


TYPES OF SIX STROKE ENGINE:
1) Velozeta Six-stroke engine
2) German Charge pump


1) VELOZETA SIX STROKE ENGINE:
In the first approach, the engine captures the waste heat from the four-stroke Otto cycle or Diesel cycle and uses it to power an additional power and exhaust stroke of the piston in the same cylinder. Designs use either steam or air as the working fluid for the additional power stroke. As well as extracting power, the additional stroke cools the engine and removes the need for a cooling system, making the engine lighter and giving an estimated efficiency of 40%.[1] The pistons in this type of six-stroke engine go up and down six times for each injection of fuel. There are two power strokes: one with fuel, the other with steam or air. The currently notable designs in this class are the Crower six stroke engine,
2) GERMAN CHARGE PUMP:
The second approach to the six-stroke engine uses a second opposed piston in each cylinder that moves at half the cyclical rate of the main piston, thus giving six piston movements per cycle. Functionally, the second piston replaces the valve mechanism of a conventional engine but also increases the compression ratio.
OTHER TYPES OF SIX STROKE ENGINE:
1) Crower six stroke engine
2) Griffin six stroke engine
3) Velozeta six-stroke engine
4) Bajulaz six stroke engine
1) CROWER SIX STROKE ENGINE:
In a six-stroke engine developed in the U.S. by Bruce Crower, fresh water is injected into the cylinder after the exhaust stroke, and is quickly turned to superheated steam, which causes the water to expand to 1600 times its volume and forces the piston down for an additional stroke. This design also claims to reduce fuel consumption by 40%.
2) GRIFFIN SIX STROKE ENGINE:
The key principle of the "Griffin Simplex" was an heated exhaust-jacketed external vapouriser, into which the fuel was sprayed. The temperature was held around 550 °F (288 °C), sufficient to physically vapourise the oil but not to break it down chemically. This fractional distillation supported the use of heavy oil fuels, the unusable tars and asphalts separating out in the vapouriser.
3) VELOZITA SIX STROKE ENGI NE:
In a Velozeta engine, during the exhaust stroke, fresh air is injected into the cylinder which expands by heat and therefore forces the piston down for an additional stroke. The valve overlaps have been removed and the two additional strokes using air injection provide for better gas scavenging. The engine seems to show 40% reduction in fuel consumption and dramatic reduction in air pollution.
4) BAJULAZ SIX STROKE ENGINE:
The Bajulaz six stroke engine is similar to a regular combustion engine in design. There are however modifications to the cylinder head, with two supplementary fixed capacity chambers: a combustion chamber and an air preheating chamber above each cylinder. The combustion chamber receives a charge of heated air from the cylinder; the injection of fuel begins an isochoric burn which increases the thermal efficiency compared to a burn in the cylinder. The high pressure achieved is then released into the cylinder to work the power or expansion stroke. Meanwhile a second chamber which blankets the combustion chamber, has its air content heated to a high degree by heat passing through the cylinder wall. This heated and pressurized air is then used to power an additional stroke of the piston.
PRINCIPL OF SIX STROKE ENGINE:
A six stroke engine describes a number of different approaches in the internal combustion engine to capture the waste heat from the four stroke Otto cycle and use it to power an additional power and exhaust stroke of the piston. Designs either use steam or air as the working fluid for the additional power stroke. As well as extracting power, the additional stroke cools the engine and removes the need for a cooling system making the engine lighter and giving 40% [1] increased efficiency over the Otto Cycle. The pistons in a six stroke engine go up and down six times for each injection of fuel.The six stroke engine has 2 power strokes, one fuel, one steam or air. The currently notable six stroke engine designs include Crower's six stroke engine, the Bajulaz engine and the Six-stroke engine The Beare Head engine is called a six stroke by its designer but stands apart from the others. It uses a second opposed piston in each cylinder which moves at half the cyclical rate of the main piston, thus giving six piston movements per cycle. It does not use any additional working fluid. "Six-stroke engine (Trivandrum)"In the six-stroke engine developed by the students of College of Engineering, Trivandrum, India, the first four strokes are the same as a four stroke internal combustion engine. After the exhaust stroke, instead of air/fuel mixture (as in case of petrol engines), fresh air is sucked into the cylinder from the air filter, and is removed during the sixth stroke. The valve overlaps have been removed and the additional two strokes have been provided for better scavenging, using air injection. The engine shows 40% reduction in fuel consumption and dramatic reduction in pollution. Its specific power is not less than that of a four-stroke petrol engine. The engine can run on a variety of fuels, ranging from petrol and diesel to LPG. An altered engine shows a 65% reduction in CO pollution when compared with the four stroke engine from which it was developed.
MAIN ADVANTAGES OF SIX STROKE ENGINE:
1) Reduction in fuel consumption by at least 40%:
2) Two expansions (work) in six strokes
3) Dramatic reduction in pollution:
4) Liquefied Petroleum Gas
5) Cost comparable to those of a four-stroke engine
CONCLUSION:
Billions of explosion engines are running worldwide at this time, and this era is not about to end. It is commercially obvious that the big market if for automobile, heavy goods, construction-site and farm vehicles. This is a priority for the six-stroke engine.Drastically reducing fuel consumption and pollution without radically affecting performances would allow the current concept of the automobile to be reassessed.
There is, at this day, no wonder solution for the replacement of the internal combustion engine. Only improvements of the current technology can help it progress within reasonable time and financial limits. The six-stroke engine fits perfectly into this view. It’s adoption by the automobile industry would have a tremendous impact on the environment and world economy, assuming up to 40% reduction in fuel consumption and 60% to 90% in polluting emissions, depending on the type of fuel being used. Fuel consumption for mid-sized cars should be within 4 and 5 liters per 100km. and 3 to 4 liters for the small-sized cars. Automobiles equipped with the six-stroke engine could appear in the market within 3 to 5 years
USES OF SIX STROKE ENGINE:
1) Motorboats might offer a big outlet for this type of engine. Their characteristics are perfectly suited to its use. Furthermore, the use of fuels other than gasoline would greatly reduce the risks of explosion.
2) Using non-fossil fuels of vegetable origin, natural gases and others, in simple, robust engine, operating with a minimum of adjustments and non-pollutant.
3) Many more applications may also be envisaged.
IMPORTANT WARNING:
The following descriptions, charts and diagrams refer to the patented version of the Bajulaz cycle's principle. They are used to explain the six-stroke engine's functioning but they must not be taken as a final result. The development of the engine's prototype showed many improvements to be taken in consideration. For example, the piston-balanced valves depicted further were not used for the prototype, being replaced by a much more effective valve system, for which new patents are deposited.
FACTORS CONTRIBUTING TO INCREASED THERMAL EFFICIENCY, REDUCED FUEL CONSUMPTION AND POLLUTANT EMISSIONS.
1)The heat that is evacuated during the cooling of a conventional engine’s cylinder head is recovered in the six-stroke engine by the air-heating chamber surrounding the combustion chamber.
2) After intake, air is compressed in the heating chamber and heated through 720 degrees of crankshaft angle, 360 degrees of which in closed chamber (external combustion).
3) The transfer of heat from the very thin walls of the combustion chamber to the air heating chambers lowers the temperature and pressure of the gases on expansion and exhaust (internal combustion).
4) Better combustion and expansion of gases that take place over 540 degrees of crankshaft rotation, 360° of which is in closed combustion chamber, and 180° for expansion.
5) The glowing combustion chamber allows the optimal burning of any fuel and calcinate the residues.
6) Distribution of the work: two expansions (power strokes) over six strokes, or a third more than the in a four-stroke engine.
7) Better filling of the cylinder on the intake due to the lower temperature of the cylinder walls and the piston head.
8) Elimination of the exhaust gases crossing with fresh air on intake. In the six stroke-engine, intake takes place on the first stroke and exhaust on the fourth stroke.
9) Large reduction in cooling power. The water pump and fan outputs are reduced. Possibility to suppress the water cooler.
10) Less inertia due to the lightness of the moving parts.
Lower oil temperature. With combustion taking place in a closed chamber, the high temperatures less stress the oil and the risk of dilution is reduced, even in cold starts. Since the six-stroke engine has a third less intake and exhaust than a four stroke engine, the depression on the piston during intake and the back
Pressure during exhaust is reduced by a third. The gain in efficiency balances out the losses due to the passage of air through the combustion chamber and heating chamber valves, during compression of fresh and superheated air. Friction losses, theoretically higher in the six-stroke engine, are balanced by a better distribution of pressure on the moving parts due to the work being spread over two strokes and the elimination of the direct combustion.
DESIGN AND FUNCTION:
With the six-stroke cycle, the two supplementary chambers allow parallel function from which results a full eight-event cycle: two four-event-each cycles, an external combustion cycle and an internal combustion cycle. The diagram shows the interconnection of the eight events in the six-stroke cycle. Event three and event six occur within closed chambers and have no direct action on the crankshaft. They are called static events compared to the six other dynamic events.
The first cycle of four events is of external combustion
It includes 1. Event 1: pure air intake in the cylinder (dynamic event). 2. Event 2: pure air compression in the heating chamber (dynamic event). 3. Event 3: keeping pure air pressure in closed chamber where a maximum heat exchange occurs with the combustion chambers walls, without direct action on the crankshaft (static event). 4. Event 4: expansion of the super heated air in the cylinder, work (dynamic event). During this four event's cycle, the pure air never comes in direct contact with the heating source.
The second cycle of four events is of internal combustion
It includes 1. Event 5: re-compressions of pure heated air in the combustion chamber (dynamic event). 2. Events 6: fuel injection and combustion in closed combustion chamber, without direct action on the crankshaft (static event). 3. Events 7: combustion gases expanding in the cylinder, work (dynamic event). 4. Event 8: combustion gases exhaust (dynamic event). During this four event, the air comes in direct contact with the heating source.
The sketch shows the cylinder head equipped with both chambers and four valves of which two are conventional (intake and exhaust). The two others are made of heavy-duty heat-resisting material. During the combustion and the air heating processes, the valves could open under the pressure within the chambers. To avoid this, a piston is installed on both valve shafts, which compensate this pressure. Being a six-stroke cycle, the camshaft speed is one third of the crankshaft speed. The combustion chambers walls are glowing when the engine is running. Their small thickness allows heat exchange with the air-heating chamber, which is surrounding the combustion chamber. The air-heating chamber is isolated from the cylinder head to reduce thermal loss. Through heat transfer from the combustion chamber to the heating chamber, the work is distributed over two strokes, which results in less pressure on the piston and greater smoothness of operation. In addition, since the combustion chamber is isolated from the cylinder by it's valves, the moving parts, especially the piston, are not subject to any excessive stress from the very high temperatures and pressures. They are also protected from explosive combustion or auto-ignition, which are observed on ignition of the air-fuel mixture in conventional gas or diesel engines. The combustion and air-heating chambers have different compression ratio. The compression ratio is high for the heating chamber, which operates on an external cycle and is supplied solely with pure air. On the other hand, the compression ratio is low for the combustion chamber, which operates on an internal combustion cycle.
The combustion of all injected fuel is insured, first, by the supply of preheated pure air in the combustion chamber, then, by the glowing walls of the chamber, which act as multiple spark plugs. In order to facilitate cold starts, the combustion chamber is fitted with a heater plug (glow plug).
In contrast to a diesel engine, which requires a heavy construction, this multi-fuel engine, which can also use diesel fuel, may be built in a much lighter fashion than that of a gas engine, especially in the case of all moving parts.
Injection and combustion take place in the closed combustion chamber, therefore at a constant volume, over 360 degrees of crankshaft angle. This Feature gives plenty of time for the fuel to burn ideally, and release every potential calorie (first contribution to pollution reduction). The injection may be split up, with dual fuel using the SNDF system (Single Nozzle, Dual Fuel).
The glowing walls of the combustion chamber will calcine the residues, which are deposited there during fuel combustion (second contribution to pollution reduction).As well as regulating the intake and exhaust strokes, the valves of the heating and the combustion chambers allow significant additional adjustments for improving efficiency and reducing noise. Since new patents are being applied for, design details do not appear in the present description.



Comments

  1. Hello , you really did very well in your post.The post is full of information and pictures also shared in the post.
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  2. That’s really a nice one, I have seen many blogs but they are outdated so I’m pleased to see this blog now.
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  3. Hi author thanks this is really one the best post on six stroke engine and it this is very helpful for those students who are doing mechanical engineering.
    Automobile Engineering

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  4. Good to know about the six stroke industrial engines, knew earlier about 2 & 4 stroke engines only.

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  5. Good to know about it and very useful information

    ReplyDelete
  6. ALL THANKS TO DR WILLIAMS FOR THE GREAT DEED HE HAVE DON FOR MY FAMILY.This information will be useful for Epilepsy and stroke patients who is willing to use herbal medicine. My daughter had temporal lobe epilepsy, She had seizure and had a grand mal with rage episode. Our daughter's seizure is constant throughout the day. We had used several medicine which include: Epilim and Keppra, experience seizure control at the cost of serious debilitating side effects. It was during a casual conversation with a friend that I learned about herbal Dr. William on how he help her cure his son from stroke and so many others with different illness,his medicine does not have any side effect.after my daughter have finish taking dr williams medicine I am glad to say that he has been seizure-free since July 2015 after taking William medicine. this a miracle cure?contact him for more detail (drwilliams098675@gmail.com) .
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  7. What a great and inspiring story! I was married for seven years without any child; because of this my husband start acting strange, coming home lately and not spending time with me any more and he divorced me. So i became very sad and lost in life because my doctor told me there is no way for me to get pregnant this really make life miserable for me. until i came across a friend who told me about Baba Alika from the Internet, how he has helped a lot of women with this similar problems that i am going through so i contacted him on: (babaalikahealinghome@yahoo.com) and explained to him. he told me all what to provide before he could cast a reunite spell to bring back my husband which i did and he sent a powerful prayer which i had to say at mid night while he cast the love spell. It was a miracle, 24 hours later my one and only husband came back to me and apologize for all he has done and told me he is fully ready to support me in any thing i want, I quickly call Baba Alika and told him what was going on at that moment, and he also prepared and sent me a herbal medicine which he said it will cure every unwanted diseases or infections that has been stopping me from conceiving then instructed me on how to use it before meeting with my husband, behold after using this native herbs and root, few weeks later i started feeling pregnancy signs all over me, truly i was pregnant i just gave birth to twins (boys) on the 1st of this month. I Vow to let the whole world know about Baba Alika for saving my relationship and for also giving me children i can proudly call my own today. For any woman who thinks it impossible, here is an opportunity for you to smile and bring happiness to your family kindly contact Baba Alika via Email on: (babaalikahealinghome@yahoo.com). Indeed, he is a God sent to bring back lost lovers and bring you happiness...

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  8. I'm Catherine and i am here to share a great story of how my 11 years old son was cured of an autistic disease, I have gone to so many places but to no avail, i have spent a lot of money from hospitals trying to eradicate this disease and when all hope was lost, I was introduced by a friend to Dr Odoin at (dr.odionsolutionhome@yahoo.com) who helped me cure Jones my son from his Autistic disease. Medical doctors could only give me supplements to suppress this disease but Jones will always exhibit this symptoms of autism; difficulty with communication, difficulty with social interactions, obsessive interests and repetitive behaviors and non verbal but Dr Odion cured my son Jones totally from this autistic symptoms. This is so great because Jones is my only son and i couldn't bear the social disgrace and embarrassment Jones always experienced. But thanks a lot to this great doctor who helped me in so many ways to cure my son Jones who is now a normal and healthy kid. It's been 2 months since i encountered with this great doctor and since then Jones has never portrayed any of this symptoms anymore nor undergo crisis and now plays with his friends. Though he experiences some little stigmatization about his past condition but he is a 100 percent normal kid now all thanks to this great doctor. If you're in need of cure for this autistic disease you can contact the doctor who cured Jones at (dr.odionsolutionhome@yahoo.com). All medical reports now shows that Jones is free from Autism. I write this here today because i am so glad that my son is healed and i would also want you to be cured if faced with this disease, indeed i am grateful to Dr Odion for curing Jones.

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  9. WOW ALL THANKS TO DR WILLIAMS I HAVE NEVER BELIEVE IN HERBAL REMEDIES.
    my son have been a patient of stroke . I had tried a lot of anti viral med prescribed to me by doctors over how many years now but I could not see any improvements in my son symptoms. One day when going through the internet , i got to know about this great Herbal Dr who uses his herbal remedies in curing people from stroke,quickly i contacted him and he prepared a herbal medication for my son which i received and he used it as instructed by Dr Williams. After few weeks the improvement were very visible. trouble swallowing and the speech delays stopped and now he is stroke free, I would recommend this to all my friends,families,around the globe suffering from autism.you can contact him through his email on drwilliams098675@gmail.com.for advice and for his product THANKS TO YOU ONCE AGAIN ADMIN FOR SUCH AN INFORMATIVE BLOG.

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  10. I recently have some difficult conversations and I did what a lot of people do when they want to know more about something. I googled it. I came across Dr Williams herbal medicine on YouTube so many people thanking him about his good work. I also have stroke. I wasn’t running all over God’s creation with every man I could find but here I am. I have felt bad about myself for so many years now because of my stroke status. I obviously still have some self-accepting to do but I want to thank Dr Williams for everything he have done for my family ,after taking Dr Williams medicine i was completely free from stroke within one month of usage, I think what you are doing is so admirable. you have helped me a lot! I want to definitely reach out to you and thank you for your amazing work. You are a good person, and an extremely talented man. You have helped millions with your herbs, and have really inspired me,and i pray you still continue doing the good work.you can also email him on drwilliams098675@gmail.com for help

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  11. It’s not longer a news that this deadly ailment called STROKE now have a cure through Herbal medication, for those of you still in doubt, I am a living witness. I have been living with Stroke for as long as I can remember. We all know that the stigma of Stroke can be harder to treat than the disease itself. I hope we know even most of the pharmaceutical drugs are product of Herbs.To know more about it, Check out this blog: curetostroke.blogspot.com . Don't forget to share to those in need also. or schedule a consult with him via: drallenchase@gmail.com. Please also share your testimonies to inspire others.

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  12. This information will greatly help stroke patients, I suffered a massive ischemic stroke, I was forced to give up work after having a stroke, but the medication I used proved there is life after stroke and I decided to share my testimony. It is a misconception that strokes can not be cured or reversed as stated by professionals. I am living proof that improvement and cure is certain with Herbal Medicine, death from stroke can be defeated. When I had the stroke, I felt trapped inside my body. I knew that everything that was 'me' was still there, but I couldn't communicate. It was the hardest thing I’ve ever gone through. With Herbal Medicine, and his recommended healthy diet, I consider myself regaining as much as 99.9% back to my old normal and satisfied. It is in short, an answer to prayer. I'd recommend any stroke patient to contact Dr. Allen for advice and more information with email:drallenchase@gmail.com or visit: curetostroke.blogspot.com

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