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Injector (204)

Fuel injection is the method of mixing fuel and air in an internal combustion engine that’s used in virtually all newer model automotive petrol engines.Fuel injectors use electronic controls to spray precise amounts of fuel into the intake air. As the fuel is sprayed, it’s atomized for more efficient ignition .Operational benefits to the driver of a fuel-injected car include smoother and more dependable engine response during quick throttle transitions, easier and more dependable engine starting, better operation at extremely high or low ambient temperatures, increased maintenance intervals, and increased fuel efficiency. On a more basic level, fuel injection does away with the choke, which on carburetor-equipped vehicles must be operated when starting the engine from cold and then adjusted as the engine warms up. Fuel injection generally increases engine fuel efficiency. With the improved cylinder-to-cylinder fuel distribution of multi-point fuel injection, less fuel is needed for the same power output (when cylinder-to-cylinder distribution varies significantly, some cylinders receive excess fuel as a side effect of ensuring that all cylinders receive sufficient fuel).

Exhaust emissions are cleaner because the more precise and accurate fuel metering reduces the concentration of toxic combustion byproducts leaving the engine, and because exhaust cleanup devices such as the catalytic converter can be optimized to operate more efficiently since the exhaust is of consistent and predictable composition.                                                                   All diesel engines (with the exception of some tractors and scale model engines have fuel injected into the combustion chamber.

Earlier systems, relying on crude injectors, often injected into a sub-chamber shaped to swirl the compressed air and improve combustion; this was known as indirect injection. However, it was less thermally efficient than the now universal direct injection in which initiation of combustion takes place in a depression (often toroidal) in the crown of the piston.

Throughout the early history of diesels, they were always fed by a mechanical pump with a small separate cylinder for each cylinder, feeding separate fuel lines and individual injectors.Most such pumps were in-line, though some were rotary.
                                                 
Most modern diesel engines use Common Rail or Unit Injector direct injection systems. The common material are stainless steel,brass.   
          
World famous brands:ZEXEL®, NIPPONDENSO®, BOSCH®, DELPHI®.

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