Machine Parts

Types of automobile engines are given bellow: a.       Number of cylinders: According to number of cylinder engine is two, three, four, six, eight and twelve cylinder types. b.       Arrangement of cylinder: Arrangement of cylinder engine can divided many types such as row type engine and flat type engine. c.       Firing order: d.       Classification by cooling: According to cooling automobile engine are two types i.                     Water cooled ii.                  Air cooled e.       Classification by cycles: According to cycles automobile engine are two types i.                     Two stroke cycle ii.                  Four stroke cycle.  f.        Classification by Fuel: Mainly it depends on which types of fuel is used. According to fuel automobile engine are two types i.                     Diesel engine  ii.                  Petrol engine. g.   

Sources of pollution in automobile: There are four source of pollution in automobile a.       Without controls carburetor.  b.       Fuel tank emit fuel vapor.  c.       Crankcase emit blow by emission. d.       Tail pipe emit exhaust gases contain pollutants. The ways for controlling emission control: There are four ways for emission controlling and they are i.                     PCV (Positive crankcase   ventilation) ii.                  Evaporative emission control iii.                Exhaust after treatment iv.                Catalytic converter

The radiator is a device for holding a large volume of water in close contact with a large volume of air so that heat will transfer from the water to the air. The radiator core is divided into two separate and intricate compartment water passes through one and air passes through the other. Air passes through the outside of the tubes between the fins, absorbing heat from the water in passing.                                                                                                                                    Figure Radiator of a cooling system of an engine.

Automotive or Car Engine Liquid Cooling System/ Water Cooling System Types: There are three types of liquid/water cooling system in a car or an engine and they are given below: 1.       Water Jackets cooling system. 2.       Water Pump cooling system 3.       Thermostat Valve cooling system 1.       Water Jackets cooling system: Water Jackets are designed to keep the cylinders cool. The water jackets are cast into the cylinder blocks and heads.    2.       Water pumps cooling system: The water pump is a impeller type and are mounted at the front end of the cylinder block between the block and the radiator. The pump consist of a housing, with a water inlet and outlet and an impeller. The impeller is a flat plate mounted on the pump shaft with a series of flat or curved blades or vanes.  3.       Thermostat Valve Cooling System: Thermostat valve warm up engine quickly. It engine cool engine.

Purposes of Engine cooling system: The purpose of the cooling system is to keep the engine at its most efficient operating temperature at all engine speeds and all driving conditions. Temperatures higher than this will cause the lubricating oil film to break down and lose its lubricating properties.                                                   Figure: Engine Water Cooling System Types of engine cooling system: There are two types of engine cooling system 1.       Air cooling system 2.       Liquid cooling system                                                    Figure: Engine Air Cooling System Most of the engine used liquid cooling such as car, motorcycles, airplanes and so on.