Anyoon Rotary Engine (The most perfect and efficient IC Engine)

This is the Official site of Anyoon engine

    Improve the efficiency and increase the life of engine is of paramount importance in IC  engine design. In order to improve efficiency and increase life of engine; I have successfully  developed a new concept rotary engine which provides up to 78% efficiency, after spending several years to research. The concept is described below.

    Japan Nuclear catastrophes show that nuclear fission is not a suitable option. Nuclear fusion is the only suitable option, but fusion technology is not ready now. We have to wait at least 50 years for a commercially viable fusion technology. So a highly efficient engine like Anyoon engine is the only hope to extend oil supply to those 50 years anyoon engine can reduce fuel consumption by 1/3 without affecting performance. After those 50 years Anyoon engine can still use using hydrogen as fuel. Japan has shut down all its nuclear power plants and the industries in Japan say: there will be a shortage of electricity for industries to operate. So there will be huge shortage of electricity when electric car come to market since Houses uses 5-30 hp per day; Vehicle need 10-200 hp per hour; so more power stations are required for electric cars to charge its battery. For emissions of Anyoon engine

                     I contacted DOE for funding for development of engine. After a month of thorough evaluation of my concept; DOE reverted positively by saying that. I can get funding for development, if I collaborate with a U.S.-based firm on a competitive solicitation and become part of the development of energy-saving technologies. I am requesting that I may be guided to the right quarters who could help me in this respect of getting a collaborative development funding from DOE for Anyoon rotary engine, if they are satisfied with my project. DOE reply is given in the page  DOE Reply

    Highly regarded Engine magazine “Engine Technology International" published a technical piece on new concept engine with the Title "Rotor Revolution”. You can download this article from Downloads Page

Why Rotary engine

Piston engine converts linear motion to rotational motion. However linear momentum and angular momentum are pseudo vectors, that means they are conserved independently. To transform entire kinetic energy of piston to rotational parts, either crank length has to be infinity or weight of rotating parts has to be infinity. In real world both are not possible. So there will be some losses known as inertial losses and vibrational losses; damping vibration will not recover that energy but will convert it to heat energy (another overhead). In rotary engine there will not be any such losses.

        This IC engine is not only unidirectional rotary but also obeys Otto cycle perfectly. Even though modern architecture of the IC engines are nearing the end of its development limit, There are still vast reserves of untapped potential for more efficiency in the Otto cycle(from which most of the heat engines are derived) itself. So I decided to use this potential through my new rotary engine. In my engine all four Phases of the Otto cycle are optimized for better efficiency without losing power. In this engine 4 stages of Atkinson cycle (a more efficient variant of Otto cycle except expansion ratio different from compression ratio) are optimized for better efficiency 2 stages of them are shown in PV diagram The new rotary engine has an efficiency of more than 78%.This is more than best fuel cell can offer (best efficiency fuel cell can offer is 70% for alkaline fuel cell and 50% for commonly used PEM fuel cell) The new rotary engine achieves this high efficiency by implementing constant volume heat addition, internal cooling by water injection for cooling and Atkinson Cycle. Implementation of constant volume heat addition is considered to be a holy grail in IC engine design and Constant volume heat addition can provide 50% more power and there by efficiency (15% of total fuel energy is gained) while using same amount of fuel(Ref: ‘Design and Simulation of 4-Stroke Engines’ by SAE press – page 81; Author Gordon P. Blair). Another 30% improvement in efficiency (9% of total fuel energy) can be achieved by implementing higher expansion ratio (Atkinson cycle) another 80% improvement (24% of total fuel energy) by internal cooling by water injection (by reducing 50% of cooling loss (15% of total fuel energy) and 30% of exhaust loss (9% of total fuel energy). Also reduces disassociation loss). Water injection inside combustion chamber for cooling is more suitable to the new concept rotary engine than existing piston engines because of the implementation of constant volume heat addition. Assuming the efficiency of current petrol engine is 30%; new engine can provide efficiency of 78% (50+30+80=160% more efficiency than existing engines). To deal with sealing problem I have invented a new sealing system which provides 3D sealing. The new sealing system uses a microcellular rubber strips at the bottom of the metallic seals so that it seals both upper and bottom part of the seals.
        Carnot limit of efficiency for an engine working between 2000K and 300K is 85%. This 2000K is made possible by Constant volume heat addition and temp is brought down to 300K by higher expansion ratio and water injection for cooling.
        A patent has been granted for my concept. I had submitted the drawings and relevant details to the Head of Mechanical Department, Cochin University of Science and Technology, who was kind enough to give me a recommendation letter. Ex-President of India (Dr. Abdul Kalam Azad) appreciated my concept through an Email.
        Notes On water Injection:-Assuming losses due to cooling and exhaust is 30% each of the total
fuel energy for conventional engines. One way to increase efficiency of any heat engine is to reduce output temperature (since efficiency = 1 - output temperature / input temperature); because water injection inside combustion chamber for cooling reduces out temperature greatly (heat converted to more work by converting water to steam and increasing pressure of steam and gases) this can extend efficiency of Otto cycle beyond theoretical limit. Since we have control over injected water suitable additives can be added to prevent corrosion like alkaline materials to neutralize acid formation.

Important notes on water injection

For a rough calculation: Say when water is injected (4:1 air water ratio) pressure is reduced by almost 10% and temperature decrease by 50%. This is because of high specific heat of water. But fundamental thermodynamic principle says:

 Wcycle = Q cycle


Wcycle = Qin- Qout

 Regardless of working fluid,

 Since Qin (heat not temperature) is same for both water injection and without water injection. And water injection can reduce Qout. So more work can be generated by water injection and it can also reduce cooling loss by 50% since heat transfer is directly proportional to Thot-TCold and thus water injection that can reduce Thot (gas) by 50% can reduce cooling loss by 50%.

In actual engines cooling loss is 30% and if I can reduce it by 50% there is a 15% efficiency gain. If I recover water from exhaust and reuse it then less water has to be carried on board; there will be a gain in power to weight ratio.

Steam can produce more work for every single degree of temperature reduced (by expanding) than air. This is why so many power plants use steam to power turbines instead of just hot air. Fundamental advantage of rotary engine over piston engine is that in rotary engine rotor does not stop during operation so there is no need to overcome static friction; but in piston engine at TDC and BDC piston stops so it has to overcome static friction two times every one revolution of crank shaft. In Anyoon engine stoppers are reciprocating but these stoppers are very light and connected to cam through cam follower bearing, since rolling friction is 1/100th of sliding friction, using cam follower bearing practically eliminates these frictions.

Carnot efficiency can be 100% only if tHot is infinity or tCold is 0 Kelvin. But in an engine we are giving heat at 270k(atmospheric temperature) if we recover almost all heat given to the system then we can get near 100% efficiency, water injection is such a waste energy recovery system. It does not violate second law of thermodynamics i.e. there is no flow of heat from cold body to hot body.Water injection can be timed at any time during expansion stroke and optimum time and duration of injection can be programmed to Electronic Control Unit. Water is injected after complete combustion; combustion will be very fast due to constant volume heat addition so water injection will not affect combustion

 Future Fuel Options

Houses use 5-30 hp per day; Vehicle needs 10-200 hp per hour. That means vehicles uses 10 times more power than houses use (assuming average one hour use of vehicle per day). So only 10% of vehicles can be recharged even in off-peak hours like night; that means more power stations (10times more capacity) are required for a 100% electrification of all automobiles. Currently that requires more thermal power stations to deal with that need. Thus Electric cars shift harmful emission from cars to PowerStation. There is no reduction in actual effective Emissions. However if  consider nuclear fission reactors to full fill that need then the number of reactors required will be at least 20 times more than today. Increasing the risk of a nuclear radiation disaster; like just happened in Japan. (Japanese are well known for attention to detail and their reactors are designed to withstand earthquakes, still there was explosion in their reactors). Only other option is fusion reactors but it is still 40 years away from commercial implementation. And there is also problem of efficiency in magnetically confined plasma. An error in magnetization will cause a huge explosion of reactor; even though there will not be any radiation the explosion of fusion reactors will be larger than fission reactors. Fuel cell does not deliver its promised efficiency as of now, and its performance is very low.  So Internal Combustion engines using bio-fuels and hydrogen (water split using from solar energy) is the only viable option for the majority of vehicles.


Japan Nuclear catastrophe

Japan Nuclear catastrophes show that nuclear fission is not a suitable option. Nuclear fusion is the only suitable option, but fusion technology is not ready now. We have to wait at least 50 years for a commercially viable fusion technology. So a highly efficient engine like Anyoon engine is the only hope to extend oil supply to those 50 years. After those 50 years Anyoon engine can still used using hydrogen as fuel.


Problems of electric vehicles

U.S.-wide transmission and distribution losses of electricity were about 5% in 1970, and grew to 9.5% in 2001; America operates a fleet of about 10,000 power plants. The average thermal efficiency is around 33%. Efficiency has not changed much since 1960 because of slow turnover of the capital stock and the inherent inefficiency of central power generation that cannot recycle heat. Power plants are generally long-lived investments; the majority of the existing capacity is 30 or more years old.

Charge discharge efficiency of li-ion battery is 80-90% assuming 90% efficiency of electric motor overall efficiency of system is 72%-81%. And battery production and disposal is not environment friendly.

Even though electric motor is 90% efficient recharging of battery is not efficient that is why miniature Wankel rotary engine is being developed for replacing battery in hand held devices like PDA and cellular phone etc. which means that IC engine and generator combination is more efficient in converting chemical energy into electric energy or mechanical energy


·        Electric supply depends on Thermal power Stations.

·        Losses in distribution of electricity and Charge / discharge cycle of battery

·        Houses use 5-30 hp per day; Vehicle needs 10-200 hp per hour. So more power stations are required.

·        Electric cars shift harmful emission from cars to PowerStation. There is no reduction in actual effective Emissions.

·        Battery production and disposal is not environment friendly

·        Cost of battery will be very high depending on Huge investment in R&D

·        Size and weight of battery is very high that will adversely affect overall efficiency.

·        A mobile thermal engine with efficiency more than 55% is a more viable solution than electric vehicles.

·        Anyoon Rotary engine with more than 70% efficiency is a complete solution for the previously said problems.

·        Anyoon engine is more efficient than electric vehicle if we consider well to wheel efficiency


Inventor :  Diji N J

Address:  Nedunghayil house
                   Vennala P.O.

Phone: +91-04843929730
Mobile: +91-7736419388     

Diji Jayakaran,
Mar 12, 2009, 4:23 AM
Diji Jayakaran,
Mar 12, 2009, 4:22 AM