HNP - 'Petrol Performance Enhancer'

A device which introduces a small amount of air ahead of fresh charge at the beginning of suction stroke thus forming heterogeneous air fuel mixture in the cylinder. The upper charge near the spark plug has normal air-fuel mixture and charge at the lower end is lean. Combustion starts normally and flame propagates at normal pace towards the end fuel to produce sufficient power. The burned air-fuel mixture when exhausted during the exhaust stroke involves lesser losses.

It saves petrol consumption by 10-15% per liter for four stroke engine bikes etc.

At the beginning of the suction, partial vacuum is created inside the engine inlet manifold. Due to the vacuum fresh air-fuel mixture enters into the inlet manifold from the carburetor, at the same time small amount of air enters into the manifold through the device. This air moves ahead of fresh air-fuel mixture during the first part of suction stroke. During later stage of suction , the piston moves forward due to vacuum which blocks the hole and further suction of air is stopped and the engine operates in normal manner.