12 SENR9977 Systems Operation Section Lubricating oil from the oil gallery flows through high pressure passages to the main bearings of the crankshaft (5). Then, the oil flows through the passages in the crankshaft to the connecting rod bearing journals (6). The pistons and the cylinder bores are lubricated by the splash of oil and the oil mist. Alternator Lubricating oil from the main bearings flows through passages in the cylinder block to the journals of the camshaft. Then, the oil flows from the front journal of the camshaft (2) at a reduced pressure to the cylinder head. The oil then flows through the center of the rocker shaft (1) to the rocker arm levers.
The valve stems, the valve springs and the valve lifters are lubricated by the splash and the oil mist. The hub of the idler gear is lubricated by oil from the oil gallery. The timing gears are lubricated by the splash from the oil. An external line from the cylinder block supplies oil to the turbocharger. The oil then flows through a return line to the oil pan. g00303424 Illustration 8 (1) Shaft for mounting the pulley Engines have piston cooling jets that are supplied with oil from the oil gallery. The piston cooling jets spray lubricating oil on the underside of the pistons in order to cool the pistons. The alternator produces the following electrical output:
Three-phase i02242636 Electrical System Full-wave Rectified The alternator is an electro-mechanical component. The alternator is driven by a drive belt from the crankshaft pulley. The alternator charges the storage battery during the engine operation. The electrical system is a negative ground system. The charging circuit operates when the engine is running. The alternator in the charging circuit produces direct current for the electrical system. The alternator converts the mechanical energy and the magnetic energy into electrical energy. This conversion is done by rotating a direct current electromagnetic field on the inside of a three-phase stator.
The electromagnetic field is generated by electrical current flowing through a rotor. The stator generates AC electrical power. The alternating current is changed to direct current by a three-phase, full-wave rectifier. Direct current flows to the output terminal of the alternator. The rectifier has three exciter diodes. The direct current is used for the charging process. A regulator is installed on the rear end of the alternator. Two brushes conduct current through two slip rings. The current then flows to the rotor field. A capacitor protects the rectifier from high voltages.