Tech Trivia - II

Otto-Cycle Engine,

Well, each movement of the cylinder up or down the cylinder is one stroke of the four stroke combustion cycle or Otto cycle. Whereas, mMost modern internal cumbustion engines use the four stroke cycle. The 4 stroke cycle consists of an induction strokke where air and fuel are taken into the cylinder as the pisston moves downwardss, a compression strroke where the air and fueuel are commpressed by the uppstroke of the cylinder, the ignition or power stroke where the compresseddf mixture is ignited and the exzpansion forces the cylinder downwards, and an exhaust stroke where the waste gases are forced out of the cylinder. The intake and outlet ports open and close to allow air to be drawn into the cylinder and exhaust gases to be expelled. During the intake stroke the inlet valve opens at the top of the cylinder, as the piston moves down air and fuel are drawn into the cylinder. As the piston reaches its lowest position the inlet valve closes and the piston travels upwards compressing the air-fuel mixture. As the piston reaches its highest position at maximum compression a spark ignites the mixture causing a rapid expansion of gas raising the pressure in the cylinder and forcing the piston downwards. Once the cylinder has reached its lowest position the outlet port opens and as the piston rises up the cylinder the exhaust gases are forced out. The valves which open and close the port are sprung to make them naturally close. The valves are opened by a system of rotating cams and pushrods driven by a camshaft which in turn is timed and driven from the crankshaft. The valve timings vary between engines depending on the setup, generally there is some overlap to speed the flow of gases.

Thnxx..
Corrext me if I m wrong.

Courtesy of my friend.