ME 4012 Lecture Notes - Gudgeon Pin, Connecting Rod, Camshaft
Document Summary
While the connecting rod"s small end is referred to as the gudgeon pin end, the other end, the crankpin end, is the big end of the connecting rod. The small end of the connecting rod is referred to as the gudgeon pin end. The sump at the bottom of the engine serves to keep the engine"s bottom closed. This sump is frequently filled with oil, pumped around the engine to provide lubrication and cooling. Depending on the internal combustion engine, a mechanical cycle can be completed in one revolution of the crankshaft (two-stroke cycle) or two revolutions of the crankshaft (four-stroke cycle). A four-stroke engine has mechanical valves that control air and exhaust flow from and into the engine cylinder cams attached to the camshaft, control valve opening and shutting. Using a gear drive or chain drive from the crankshaft, the camshaft is activated. The camshaft operates at a speed that is half that of the crankshaft.