LEEVENSPARK

Governor The governor is a safety device in most modern cars. It regulates the car's speed by mechanically preventing the car from going over a certain speed. So, though a car may be mechanically capable of going 180 miles per hour, the governor can be set to limit its speed to 120 miles per hour. Once a diesel engine is running, the engine speed is monitored and controlled through a governor.  The governor ensures that the engine speed stays high enough to idle at the right speed and that the engine speed will not rise too high when full power is demanded.  The governor is a simple mechanical device which first appeared on steam engines.  It operates on a diesel engine as shown in the diagram below. The governor consists of a rotating shaft, which is driven by the diesel engine.  A pair of flyweights are linked to the shaft and they rotate as it rotates.  The centrifugal force caused by the rotation causes the weights to be thrown outwards as the speed of the shaft rises.  If the

                               *2. GOING GREEN* A medley of gases that spew from automobiles pollute our atmosphere, and are fast making the environment a place unfit for living. A combination of unburnt Hydrocarbons, Carbon Monoxide, Oxides of Nitrogen combine to spread an obnoxious mixture. When in excess quantity, these tend to cause automobile pollution. Within a certain range they are acceptable, but when the engine is not tuned properly, or a vehicle uses obsolete technology, or the quality of fuel is not good, all these result in a higher level of emission of all the gases.                                                                                         It's a long, dusty road ahead. Pollution has cast its ominous shadow across the length and breadth of India; there is smog everywhere. It is a choking sensation every time one ventures out into the streets. Delhi is one of the most polluted cities of the world, with Mumbai coming a close second. As part of our efforts