InternalCombustion Engines Grewal（内燃机(Grewal编写）.ppt

Engines Four-Stroke Gasoline Engine Two-Stroke Gasoline Engines Diesel Engine Rotary Engine Steam Engine Internal combustion engine needs fuel, ignition and compression in order to run. Engines Configuration Inline Engines: The cylinders are arranged in a line, in a single bank. V Engines: The cylinders are arranged in two banks, set at an angle to one another. Flat Engines: The cylinders are arranged in two banks on opposite sides of the engine Engines Parts Exhaust Valve lets the exhaust gases escape the combustion Chamber. (Diameter is smaller then Intake valve) Intake Valve lets the air or air fuel mixture to enter the combustion chamber. (Diameter is larger than the exhaust valve) Valves: Minimum Two Valves pre Cylinder Engines Valve Springs: Keeps the valves Closed. Valve Lifters: Rides the cam lobe and helps in opening the valves. Engines Different arrangement of valve and camshaft. Engines Cam Shaft: The shaft that has intake and Exhaust cams for operating the valves. Cam Lobe: Changes rotary motion into reciprocating motion. Camshaft location is one way to classify engines. Overhead cam, SOHC, DOHC Engines It provides the means of ignition when the gasoline engine’s piston is at the end of compression stroke, close to Top Dead Center(TDC) Spark Plug The difference between a hot and a cold spark plug is that the ceramic tip is longer on the hotter plug. Engines Piston A movable part fitted into a cylinder, which can receive and transmit power. Through connecting rod, forces the crank shaft to rotate. Engines Cylinder head Part that covers and encloses the Cylinder. It contains cooling fins or water jackets and the valves. Some engines contains the cam shaft in the cylinder head. Engines Engine Block Foundation of the engine and contains pistons, crank shaft, cylinders, timing sprockets and sometimes the cam shaft. Also called short block. Engine without cylinder heads, exhaust manifold, or intake manifold attached to