<div class="text-justify"><code><sup>What if I told you that there could be a world where internal combustion engines could be noiseless, have zero emissions and lack a piston?</sup></code>




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https://steemitimages.com/DQmP8GySR5vAdby3gUdDKYqXsuzV5gwJkqpauu8Uyh3QEUJ/lawn-mower-2127637_960_720.jpg
<sup>[An internal combustion in a clean environment : image from pixabay under CCO liscence](https://pixabay.com/en/lawn-mower-lawn-mowing-rush-mow-2127637/)</sup></center>



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In the world today, there have been debates on global warming and how things are growing worse from emissions in industries to the emitting of carbon monoxide from generators. You would agree with me that environmentalists both here on steemit and worldwide are so mad with the way pollutions occur and scientists have been working so hard to either phase out internal combustion engines or develop other forms of renewable energy which is cool.


<code>If you are an environmentalist, community lover or an engine lover this is for you.</code>


Today while I was making research on the engines and the latest development in engines I came across this environmental friendly internal combustion engine type. <code>I spent 5 years in school I never heard of it but here we are self-development is the best form of development. </code>
 

What comes to your mind when you hear *green engines* for sure I am not talking about engines painted in color green. 


The engines are called the green engines you would be wondering what kind of engines are they?
Or why they are called green?

Well, all your answers are about to be answered as you follow me in this discussion.


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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>




## <center> The green engine</center>


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<div class="pull-left"><center><img src="https://steemitimages.com/DQmaFHoMHs8hh1H5ouDcrapiQyfFHHeV3TG1cmpb8K8j3o1/green-1357925_1280.png"/><br/><em><sup><sup><a href="https://pixabay.com/en/green-environmental-house-abstract-1357925/">go green: image from pixabay under CCO liscence</a></sup></sup></em></center></div>



To me, the green engines are called *green* due to their environmentally friendly nature. The ability of these engines to keep humans safe and free from dangerous air pollutants such as *carbon monoxide* from the internal combustion engines is one cool ability of the green engines. 


But what if i told you that the green engines are also a type of internal combustion engines just that, the main problem we have with internal combustion engines are the problem of fuel combustion. Their combustion is incomplete this is why we have poisonous gases whenever one is being used.


Just like the internal combustion operates(you can read about it [here a post by our steemit- mechanic @rharphelle](https://steemit.com/stemng/@rharphelle/how-an-internal-combustion-engine-works)), so does the green engine. The green engines are in fact internal combustion engines with upgraded features, they were recently discovered and known to be environmental friendly engines with almost zero emissions due to their complete combustion of fuel. They were recently discovered and are already known to be one of the best discoveries of the century. I am not surprised, it’s been long coming.


Some of the wonderful things about these engines are they have sequential variable compression ratio, they are known for their direct air intake, direct fuel injection, and they use multiple fuels, the efficiency of the green engines when compared to the normal internal combustion engine is high and like I said earlier the exhaust emission is almost zero.

In a world where we need a better source of energy and the emissions of engines have killed so many, green engines might be the solution. We now have prototypes of these engines which have been used in generators. 



<code>The green engines have no pistons in their cylinders, some Engineers would be surprised how the engines work well let’s read on as I take you through these engines.</code>



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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>



## <center>How the green engine works</center>

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<sup>Sorry I can’t get a good image on the description and the parts of the engine, but you can click [here](https://www.google.com/imgres?imgurl=https%3A%2F%2Fimage.slidesharecdn.com%2Fsssss-170316171329%2F95%2Fgreen-engine-technology-by-hanumanthappa-n-ubdtce-7-638.jpg%3Fcb%3D1489684428&imgrefurl=https%3A%2F%2Fpt.slideshare.net%2FHanumanthUbdtce%2Fgreen-engine-technology-by-hanumanthappa-n-ubdtce-73219184&docid=-4CajFDmG58rdM&tbnid=jVp0bevBS9BYJM%3A&vet=1&w=638&h=479&itg=1&bih=662&biw=1366&ved=0ahUKEwjGsr34zdjaAhUisaQKHfBuAP4QMwg_KAIwAg&iact=c&ictx=1) to see an image. The image isn’t free for reuse, so I can’t import it on my blog to avoid copyright infringement. I would try to give a description of the green engine and how the engine works. </sup>

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The green engine has sets of vanes, a pair of rotors these rotors which in them have a small number of containers or ducts. It is these containers that the compression phase, mixing phase and also combustion are being carried out. The green engine has two intakes and pair of both the fuel injector and the spark plugs.
 The normal internal engine with the piston has basically two or four strokes of the piston to complete one revolution of the crankshaft but the green engine we can’t call these strokes but rather a phase. For these engines, they undergo six phases to make one complete revolution.


*These phases include the intake, compression, mixing, combustion, power and exhaust phases.*



### The intake phase



The intake phase is the first phase of the revolution by which air is taken in directly inside the combustion chamber of the engine. Although the air is filtered just before it enters the chamber to prevent impurities and also it is regulated according to fuel used.



### The compression phase


There is a central disc which has arms and this disc immediately picks up the air that just entered into the chamber. The arms are responsible for pushing the air into the compression chamber. The compression chamber is present inside the combustion chamber, it is a small duct which is a tangent to the combustion chamber so as the arm swipes fast, air flows through the compression chamber and at high pressure, it enters back into the combustion chamber.



### Direct fuel injection phase


The green engine has another special feature which is the direct fuel injection the amount of fuel injected into the chamber is varied to the air in the chamber. And while the disc rotates in the chamber the centrifugal force causes the fuel and air in the chamber. After the fuel is super mixed the force along the vanes directs the mixture towards the spark plug.



### Combustion phase



Of course, the function of the spark plug is to ignite the super mixed fuel. Another wonderful feature of the green engine is that the combustion time of the engines could be varied to burn different grade of fuels and this feature is what makes the fuel to be completely burnt thereby reducing the emission of the engine.



### Power phase


The burning of this fuel mixture as it is being emitted out of the combustion chamber at high pressure pushes the arm of the compression chamber. When this happens, work is done as the power gotten in form of pulses and the pulse reduces the explosion of the engine. This leads to reduced engine noise compared to the internal combustion engine.



### Exhaust phase


The completely burnt gases leave the combustion chamber but are first expanded in the expansion zone. The expansion ratio of the green engine is much more than the regular internal combustion chamber and what this means is that maximum power output is derived from the fuel that is burnt. The gases which have been combusted after going through expansion is released into the atmosphere.
This completes the revolution and it starts all over again. The prototypes of these engines have been made and applied in some areas for use, but it is not common yet.


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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>



## <center>What does the green engine bring to the table?</center>

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The recent discovery in the green engine has brought a lot of change and place doubts in the mind of environmentalists about the internal combustion engine and also about the pollution the internal combustion engines have been causing. It solves the noise and air pollution of the internal combustion engine.


To the engineers, the ability of these engines to get the maximum work done from a fuel consumed cannot but be one of the most amazing things as efficiency flew from about 45% to about 80%. This is just wonderful as the application of the green engine is going to be applied in generators, submarines, trains, tractors, chainsaws, aircraft, and many more places where the regular internal combustion engines were being applied.


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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>


## <center> Conclusion</center>

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<div class="pull-right"><center><img src="https://steemitimages.com/DQmYM9U1CoWafwezom2jNbVi5pEtKjjvNzXHsj6M2w5sqE1/Zero_Emission.jpg"/><br/><em><sup><sup><a href="https://commons.m.wikimedia.org/wiki/File:Zero_Emission.jpg">zero emissions: image from Wikimedia commons  under Creative commons attribution 3.0 by Evoluzione Telematica </a></sup></sup></em></center></div>


The environmental problem of smoke emission and noise pollution by engines can now be stopped by using special internal combustion engines which burns the fuel completely and reduces noise pollution. The high efficiency of the green engines, as well as their ability to regulate the time used in burning a fuel, makes them smart and applicable in doing this job effectively.


The green engine completes its revolution in 6 phases as compared to the regular internal combustion, these phases have been discussed above including the applications of these engines.


<code>Now the question remains are we ready for this kind of environmentally friendly engines or should we just move on to renewable energy completely? </code>


Let me hear your views on this..thanks for reading!

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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>



## References


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For further reading, please get any of these books or follow the link.
* GREEN ENGINE Pravesh M. Adhagale, Nilesh S. Mate. Department of Mechanical Engg B.N.C.O.E, Pusad, (India)
* Green Engine V. Lohit, V. Nikita Verrabahu. Department of Mechanical Engineering, R. M. K. Engineering College, Chennai, India 2 Aeronautical Engineering, KCG College of Technology, Chennai, India
International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064 Impact Factor (2012): 3.358
* [green engine tech](http://www.greenenginetech.com)
* Introduction to Internal Combustion Engines by Richard Stone
* Engineering Fundamentals of the Internal Combustion Engine by Pulkrabek 
* Internal Combustion Engines by K.K. Ramalingam
* [seminars only green engine](http://www.seminarsonly.com/Labels/Green-Engine-PDF-Download.php)

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<p><img src="https://steemitimages.com/DQmS9w2nNjPbewDArfV2f4x7VJvTgSRBK9mjXwPyKCfXFxH/707932.png"></p>


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