Automobile knowledge

Comparison between Four stroke and two stroke engines Four stroke engine Two stroke engine 1.One working stroke for every two revolution of crank shaft 1.One working stroke for each revolution of the crankshaft 2.Turning moment on the crankshaft is not due to one working stroke for every two revolution of the crankshaft Hence heavy flywheel is required & Engine runs unbalanced. 2.Turning moment of the crankshaft is more even due to one working stroke for each revolution of the crankshaft Hence lighter flywheel is required and engine runs balanced. 3. Engine is heavy . 3. Engine is light. 4.Emgine design is complicated. 4.Engine design is simple. 5.More cost . 5.Less cost . 6.less mechanical efficiency due to more friction on many parts. 6.More mechanical efficiency due to less friction on a few parts. 7.Mor...