We come first to the ignition system of an internal combustion engine that depends on the type of engine and the fuel being used in the unit. A precisely timed spark would ignite petrol engines, while it is through compression heating that would ignite diesel engines.
Ignition of a spark ignition engine, would result from a mixture of an electric spark from a spark plug, with a controlled and precise timing. This type of ignition is applicable to almost all gasoline engines, while the timing of diesel engines is controlled precisely by the pressure pump and injector.
There is ignition as the temperature of the fuel and air mixture is taken over the temperature of its autoignition, coming from the generated heat by the compression of air during the compression stroke. Diesels composed the vast majority of compression ignition and this is because fuel is mixed with the air once the air has reached ignition temperature.
There is more efficient and faster burning of fuel when it represents a bigger surface area to the oxygen in air. In order to develop a fuel air mixture, there must be an atomization of liquid fuels, and to do this, the traditional method is by using a carburetor in petrol engines and with the diesel engines’ fuel injection. The modern petrol engines nowadays use fuel injection too although there is a difference in the technology.
In order to supply fuel into the cylinder, the use of carburetor is used in simpler reciprocating engines. In terms of cost and flexibility, carburetor technology lost to fuel injection in the mid 1980s, although it has reached a top level of precision and sophistication. Simple forms of carburetor maintained its use in small engines in forms of lawn mowers and in small motorcycles.
Automobiles using larger gasoline engines have moved to using fuel injection systems. In the case of diesel engines, the use of fuel injection system has been done since the timing of the injection would start and control the combustion.
Where autogas engines is concern, it is fuel injection system is used or the open closed loop carburetors.
Several engines of internal combustion would now need a fuel pump. In order for the combustion chamber to be overcome, in the case of diesel engines, an all mechanical precision pump system is used and this would produce a timed injection directly into the chamber for combustion.
For four stroke engine, it has these parts of the engine, namely the crankshaft, connecting rod, one or more camshafts and valves.
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