Effects of Cylinder Walls

Effects of Cylinder Walls Points : effects of cylinder walls, diesel knocking, problems in internal combustion engines, ic, engine, auto diesel The shape of the combustion chamber, including those portions of the piston and valves, which act as chamber wall surfaces, is most important from the point of view of detonation. At the end of flame travel, the end gas is located in a thin space where it makes excellent contact with cylinder walls, which are at lowest temperature.

When the bore increases the rpm of similar cylinders is reduced. In practice, the shorter the delay angle associated with operation at low rpm tends to solve the problem of detonation automatically. Therefore, large cylinders running, as they must, at low rpm have less detonation problem than is experienced with small cylinders. This characteristic is so marked that fuels of poorer ignition quality can be used as cylinder size increases. In view of the fact that increase in cylinder size increases combustion problems in the spark-ignition engine it is not surprising to find that engines with cylinders larger than 6 inch bore are nearly always of the Diesel type. A few exceptions to this rule are found in large spark ignition engines operating on natural gas, which has high resistance to detonation.