JR47
Member
also, your scenario of routing exhaust back to the intake is a reality. the auto makers have been doing this for decades and use it to burn off excess unspent fuel and to warm up the motor in cold environments.
Sorry, but I just couldn't let this lunacy pass. The air used to warm the engine rapidly, while insuring better atomization of the cool fuel, has nothing to do with the exhaust gases.
In fact, the introduction of minute amounts of exhaust gases via the EGR valve is absent in a cold engine.
The use of exhaust gas is to reduce efficiency in the combustion chamber via reducing peak operating temperatures. This, in exchange, reduces the amount of nitrous oxides produced by the engine.
It has nothing to do with achieving operating temperatures. In fact, if the Congress were to remove nitrous emissions from the EPA list, as it's well proven that combustion is less than 3% of the total, rotting vegetation making up the rest, gas mileage would increase markedly.
The analogy was bad enough when comparing the DGI of the M16 with improved systems, without the fact that it was 100% wrong technically.