International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print), ISSN 0976 – 6359(Online) Volume 2, Issue 2, May- July (2011), © IAEME 63 PERFORMANCE ANALYSIS OF SUPERCHARGING OF TWO WHEELERS Yashvir Singh 1 , Nishant Kr. Singh 2 , Rakesh Prasad 3 , Hemant Kr. Nayak 4 Hindustan College of Science and Technology, Mathura, UP, India-281122 Email: yashvirsingh21@gmail.com ABSTRACT The objective of this work is to increase the torque and power of the two wheeler by supercharging the vehicle. For this purpose LML freedom 125 cc is analysed for the work and certain parameters like torque, power, and specific fuel consumption vs rpm are calculated. The data calculated is used in software Engine Analyser for analysis purpose together with the data of supercharger. It can be seen that power and torque of the engine increases from 7 to 11 KW and 9 to 13 NM at 7500 and 9000 RPM respectively. Index Terms-Power, torque, supercharger I. INTRODUCTION A supercharger is essentially a large pump that compresses air and forces it into the engine’s air intake. Turbochargers do the same thing, only they are run by exiting exhaust gasses, while superchargers are powered by the engine’s spinning crankshaft, normally via the accessory belt. Supercharging an engine often results in huge power increases in the range of 50% to 100%, making them great for racing, cross country flying, or just having fun. And because of the way superchargers work, they provide power only when the engine is under full throttle or under load not under normal cruising conditions. This means that the supercharger will not affect the engine’s reliability, longevity, or fuel economy under normal conditions. Most of the superchargers sold today are centrifugal-style superchargers, which are internal-compression superchargers, meaning they create the boost (compress the air) inside the supercharger head unit (blower) before discharging it into the engine’s air intake. External compression superchargers (roots or screw-type superchargers) have become less popular as centrifugal superchargers have evolved. Centrifugal superchargers ( Aero Superchargers,Vortech and Paxton ) are more reliable, especially at higher boost levels, and are capable of creating much more boost than external compression superchargers, while creating a much cooler intake charge (which results in an even denser intake charge). Boost is created at the point when the supercharger’s internal impeller pushes enough air through the blower to overcome the vacuum force naturally created by the engine’s air intake, so air is being forced, rather than pulled, into International Journal of Mechanical Engineering and Technology (IJMET), ISSN 0976 – 6340(Print) ISSN 0976 – 6359(Online) Volume 2 Issue 2, May – July (2011), pp. 63-69 © IAEME, http://www.iaeme.com/ijmet.html IJMET © I A E M E