[Lamboholic]

It's a very interesting theorie. I know F1 racecars actually use water inside their fuel mixture to increase the power. It's a very clever idea and future diesel engines will probably use it too, because it really improves the exploding forces inside the cilinder. What you discribe to improve the amount of oxigen wouldn't be all that easy, because the quistion is, how much energy does it take to get rid of the discribed amount of nitrogen. Like you discribed an engine can improve very much in efficiency when the air and fuel mixture are balanced for a full reaction. If the fuel amount is to high you can either reduce it or increase the air (oxigen and nitrogen) by simply pressurise it. I agree 100% oxigen would be preferable, but it is by no means nessesary. Turbo's and intercoolers will already achieve the same resold. In the F1 racing world they have the same problem only with atmospheric engines. But still they pomp out 300 hp per litre engine capacity. They've solved the problem by reving the engine at 18000+ rpm. Therefor the engine is able to suck more air per second inside. This allows them to burn more fuel per second efficiently and create more horsepower. To improve combustion they have to use those 21% as good as they can. Therefor they have to get an equilly spreading of the balanced mix (fuel and air) through the whole cyllinder. (that's why they use mutiple engine valves per cylinder and injection) They also spend many hours testing to design the air intake to get the air to all (10) cylinders as equilly as possible to prevent one cyllinder burning more air then one other. That would reduce the maximum performance of the engine and make it consuming more energy.

Then again your right the engine needs to be stronger, ceramic materials are very capable to do so, but it isn't always realistic because of the price involved. For racecars it does work and it has been proven, no doupt.

Then the last thing, does the fuel and oxigen mixture resold in to an eco friendly car? Well you would still create CO2 which is unavoidable.
You wouldn't create as much NOx or NH3 then a normal car would produce wich would be rather nice and defenatly more eco friendly.

The question is will it be efficient enough to reduce the nitrogen inside the air, because it could take too much energy to do so.

However if it does work I would do something with the information, write it to the specialists. Maybe some car industries might be interested. Especially in the years to come when the polution ristriction from the coverments tightens the throats of the car compagnys further when time progresses.