You sound intelligent, but you are wrong. Actually, means you want to be scientific, a motor gets its power source from an outside source, such as a battery or electricity. An engine makes its own power from within, usually combustion. So, your quote of a larger displacement (you said motor, but I think you meant engine) will ALWAYS produce more torque is incorrect. You see, a 5.9 diesel is an engine, and it will produce much more torque than a 5.9 gasoline engine, but by your theory they would be equal. And, as a rule of thumb, nobody is burning 100% of whats brought into the cyl. This is why EGR valves look to re-burn the "unburnt" fuels, and a reduction in emissions. This is why splitfire plugs were invented. This is why people spend money for better plug wires, hot burning electronics to fire that plug. Stroke is bottom end torque. Same displacement cubic inches will not always perform the same. If one gets there by bigger bore and less stroke, the engine with the greater stroke will have more low end grunt. Think of a bicycle. Your legs are the piston, the "WAM"! but the length of which the pedal is attached (crank) would be your stroke. A little less leg can out perform if the crank of which the pedal is attached is much longer. Maybe the person x crank would be less than but torque could be greater than. There, lol.....
Motor: noun, a machine, especially one powered by electricity or
internal combustion , that supplies motive power for a vehicle or for another device with moving parts.
I don't know what universe you live in, but to me comparing a diesel engine and a gasoline engine is NOT
equal :banghead:
Also, if you have two identical motors and you change the bore to stroke ratio in one of them, they are no longer
equal proportionate to displacement
A
stoichiometric amount or
stoichiometric ratio of a
reagent is the optimum amount or ratio where, assuming that the reaction proceeds to completion:
- All of the reagent is consumed
- There is no deficiency of the reagent
- There is no excess of the reagent.
This means all of the fuel is burnt in the combustion process.
Regarding stoich and EGR, nice try but it doesn't take a genius to work out that most automobile engines don't operate at full throttle 100% of the time, as a result the mixture isn't at stoich 100% of the time.
Stoich for gasoline is 14.7:1 AFR
part throttle should be somewhere near 12.5:1 AFR, though it's highly application specific.
Now given that 14.7:1 is the optimum air fuel ratio for burning every single unit of oxygen in the chamber, at 12.5:1 (which is richer) there is obviously going to be higher exhaust emissions due to unburnt fuel and air. This and this alone necessitates an EGR system to reduce emissions.
Again, everything being
equal and proportionate to displacement a motor with a larger displacement will undoubtedly produce more torque.
