New Frontiers In 4 Stroke Ic Engine Design

OPENING NEW FRONTIERS IN 4 STROKE IC ENGINE DESIGN

• This is in continuation of my earlier blog http://cr4.globalspec.com/thread/62841
• The theoretical approach suggested in that blog seemed right. I was aware of the practical difficulties of implementing the piston and combustion chamber design proposed therein. Hence a new simpler design is being suggested.
• Fundamentals to this design will remain same as in my previous blog.
• The 4 stroke IC engine design needs to be split into two chambers – one for intake & compression..
• Second chamber will be for combustion and exhaust.
• The PV curve for the combustion and exhaust will be modified to get a ballooning effect explained in the previous blog –
• Through controlled chamber wall / piston design.
• However you will find the new proposal simpler to implement.
• The first chamber will be of piston kind which is ideal for suction and compression.
• Second chamber could be of rotary kind in which one could draw power over almost 350 degrees of rotation of the piston allowing 10 degrees for fuel transfer and spark plug fitment.
• Multiple pistons can be fitted in a single rotary chamber to increase power output.
• There will be no separate exhaust stroke.
• Before explaining the new piston / chamber design – take a look at the analogy of a rowing boat.
• Oars push the boat forward.
• The physical oar is the expanding combustible gas which has been ignited by a spark plug in the case of petrol engine here. Same could be applied to diesel engine also.
• The gas is let out through holes which push against specially designed cavities the wall of the chamber. Size / shape of cavities can be mathematically arrived at to provide – controlled exhaust resulting in ballooning effect of the PV curve.
• The chamber effectively looks like a toothed internal wall. One can also look it like an inner gear with external teeth (piston) meshing with internal teeth of outer gear (chamber). There is no physical meshing – only through expanding gases.
• The gases expanding from inner piston through orifices drive the piston forward. Newton's law of action and reaction apply. Pressure reduction takes place.
• Gases leak out in a controlled manner. Into atmosphere – continuously over 350 degrees rotation – unlike in a single exhaust stoke in the case of 4 strokes IC engine. Resulting in less noise. Can we do away with muffler??? More power output over 350 degrees rotation. Less carbon emission per kilometer of travel.
• Whatever has been stated above has been mathematically computed / simulated.
• I am keenly looking forward to constructive comments / suggestions, and will be interested to know – if anyone is interested to practically try out. I can share more details- as we go into implementation.