DAILY ONE INFORMATION

What is detonation? Detonation : At present the amount of power that can be developed in the cylinder of a petrol engine is fixed by the liability of a fuel to detonate, just before the flame has completed its course across the combustion   chamber and remaining unburnt charge fires throughout its mass spontaneously without external assistance. The result is a tremendously rapid and increase in pressure which sets up pressure waves that hit the cylinder walls with such violence that the walls emit a sound like a ping. It is the ping that   manifests detonation. Thus a very sudden rise of pressure during combustion accompanied by metallic hammer like sound is called detonation. The region in which detonation occurs is farthest removed from the sparking plug , and is named the detonation zone and even with severe detonation this zone is rarely more than one quarter the clearance volume.

Why single-cylinder two stroke engines are mostly used in Two-Wheelers? Most the manufactures prefer single-cylinder two stroke engines because of the following reasons: ·          A two-stroke cycle engine is more compact than a four-stroke cycle for the same amount of power handled. Therefore a two stroke cycle engine is preferred of a four stroke cycle engine in a two wheeler as it requires less space. ·          Two-wheelers, i.e. scooters, mopeds and motor cycles, are light duty vehicles to carry one or two passengers. A single cylinder engines enough power to carry such loads. ·          A petrol engine runs at a lower compression ratio than a diesel engine ratio than a diesel engine. Therefore, the weight –power ratio of petrol engine is less than a diesel engine. ·          A lighter engine makes t...