Effects of Engine Speed

Effects of Engine Speed Points : Effects of Engine Speed, Diesel Knocking, problems in internal combustion engines, ic, engine, auto diesel The effects of engine speed on detonation arc complex because a change in engine speed may still affect each of the fundamental variables, end gas pressure, temperature, and compression time. With regard to one of these variables only, namely, compression rime is the effect of engine speed always in the same direction. If time were the only variable the tendency to detonate would always decrease with increasing speed. End-gas temperature, at a given pressure, varies with speed even if inlet temperature is held constant. This variation is due to change in the amount of heat received or rejected during indirection and compression in the amount of heat temperature of residual gas, arid in the amount of work done on and by the gases during the induction process. In general all of these quantities vary with speed and their magnitudes and sometimes even their directions, cannot be known before hand with accuracy.

Variations in peak pressure with speed depend on how the inlet pressure varies. The situation is complicated by the fact that the inlet pressure is being changed and in general is being increased with increasing speed.