16-10-2010, 03:12 PM
Presented by:
V.Sudhakar
y7me918-1.ppt (Size: 1.03 MB / Downloads: 455)
Abstract
The first four-stroke piston was developed in 1876.
This four-stroke piston arrangement is still the primary design of engines built today.
Todays engines operate at only 33% efficiency.this means that only 1/3 of the energy in each gallon of fuel is used-the rest is lost through friction and heat.
With over a billion engines currently in worldwide,even small gains in efficiency will have impacts on the economy,dependency on foreign oil,and the environment.