Principles of naval engineering - Historic Naval Ships Association

Chapter 22. -DIESEL AND GASOLINE ENGINESCOUNTER-WEIGHTEDCAMSHAFT ANDBALANCE SHAFTDRIVE GEARSBLOWERDRIVEGEARIDLERGEARFLYWHEELPILOTSCRANKSHAFT GEARFigure 22-24.— Camshaft and accessory drive.75,98Xfound in diesel engines. Some manufacturersutilize mechanisms consisting primarily of chainassemblies, while others use gears as the primarymeans of transmitting power to engineparts. Combination gear-chain drive assembliesare used on some gasoline engines.ENGINEFUEL SYSTEMS.-The method ofone of the majorgetting fuel into the cylinder isdifferences between gasoline and diesel engines.As pointed out earlier, fuel for gasoline enginesis mixed with air outside the cylinder and themixture is then drawn into the cylinder and compressed.On the other hand, fuel for dieselengines is injected or sprayed into the combustionspace after the air is already compressed.The equipment which supplies fuel to the cylindersof a gasoline engine would necessarily bedifferent from that of a diesel engine.There are several types of fuel injectionsystems in use. The function of each type is,however, the same. The primary function of a571