Supercharging

Supercharging: is the process of supplying greater mass of air to engine cylinder by compressing intake air initially with a view to obtain higher power. This is essential for aircraft at high altitudes where density of air is less. It promotes knocking.

effects of supercharging on performance of I.C. engines:-

The effects of Supercharging on performance of l.C. engines are:

(i) Power output: Supercharging produces more power because the supercharger supplies air at a pressure and density higher than atmospheric with has the effect of increasing

volumetric efficiency.

(ii) Mechanical efficiency : The mechanical efficiency of a supercharged engine is higher than that of one not supercharged.

(iii) Fuel consumption : It provides better mixing of fuel and air which results in a specific

reduction of fuel consumption and the thermal efficiency increases.

objectives of supercharging:-

The objectives of supercharging are:

1. To overcome the effect of high altitude, as in the case of aircrafts and stationary .engi ties in mountains.

2. To reduce the weight of an engine per kW or power developed, asin the case of racing cars.

3. To reduce the size of the engine to fit into a limited space, as in the case of locomotives or marine engines.

4. To increase the power output of an existing engine to meet greater power demands.