ABSTRACTAfter 130 years of refinement the old 4 cycle process used by todays engines produce a lot more horsepower over a narrow high rpm range. However, they also produce poor low rpm torque, high fuel consumption and a lot more pollution. Therefore, to make the old 4 cycle process produce more torque and horsepower over a broader rpm range and reduce its high emissions and fuel consumption, todays engines have become a nightmare of mechanical complexity and emission controls. Negative Pressure Supercharging is a revolutionary new clean burn HTCSI (Homogeneous Thermal Charge Spark Ignition) supercharging combustion process. It is based on the fact that the pressure in the cylinder must be reduced first in order to create a vacuum or suction. Therefore, the more the pressure is reduced in the cylinder, the higher the vacuum or suction, the more air is pulled into the cylinder.It was first developed on a Chrysler 360CI V8 & 245CI Hemi 6-cylinder engine & has been successfully functional. It uses a unique combination of mechanically simple parts to supercharge like Tri-Y headers, SVT camshaft, Hot air induction housing, cold cooling system, spark amplifier & special ignition timing.It is a highly advanced 6-cycle supercharging combustion process that produces substantially more torque and horsepower and much lower fuel consumption and emissions over a lower and wider rpm range than the old 4 cycle process used by todays engines.Negative Pressure Supercharging can be easily applied to all the old & new, mechanically complex or simple, carburetted or Fuel Injected, Petrol, gas or Diesel engines.

(Arun Kr. Sharma)VIII Sem (Mechanical)College No.:-060111

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