tailieunhanh - Automotive Engine

Automotive engine The component of the motor vehicle that converts the chemical energy in fuel into mechanical energy for power. The automotive engine also drives the generator and various accessories, such as the air-conditioning compressor and power-steering pump. See also: Automotive climate control; Automotive electrical system; Automotive steering Early motor vehicles were powered by a variety of engines, including steam and gasoline, as well as by electric motors. The flexibility of the gasoline engine operating on the four-stroke Otto cycle soon made this engine predominant, and it remains the dominant automotive power plant. | McGraw-Hill s AccessScience Page 1 of 4 access Sei en ce Encyclopedia of Science Technology Online Close Window ENCYCLOPEDIA ARTICLE Automotive engine The component of the motor vehicle that converts the chemical energy in fuel into mechanical energy for power. The automotive engine also drives the generator and various accessories such as the air-conditioning compressor and power-steering pump. See also Automotive climate control Automotive electrical system Automotive steering Early motor vehicles were powered by a variety of engines including steam and gasoline as well as by electric motors. The flexibility of the gasoline engine operating on the four-stroke Otto cycle soon made this engine predominant and it remains the dominant automotive power plant. The basic modern automotive engine see illus. is a gasoline-burning liquid-cooled spark-ignition four-stroke-cycle multicylinder engine. It has the intake and exhaust valves in the cylinder head and electronically controlled ignition and fuel injection. See also Engine Automotive engine which has six cylinders double-overhead camshafts 24-valve electronic coil-on-plug spark ignition and multiport fuel injection. Oldsmobile Division General Motors Corp. http id 064300 name print 9 22 2008 McGraw-Hill s AccessScience Page 2 of 4 Otto-cycle engine An Otto-cycle engine is an internal combustion piston engine that may be designed to operate on either two strokes or four strokes of a piston that moves up and down in a cylinder. Generally the automotive engine uses four strokes to convert chemical energy to mechanical energy through combustion of gasoline or similar hydrocarbon fuel. The heat produced is converted into mechanical work by pushing the piston down in the cylinder. A connecting rod attached to the piston transfers this energy to a rotating crankshaft. See also Gasoline Internal combustion engine Otto cycle Cylinder arrangement Engines having from 1 to 16 cylinders in in-line

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