FUEL INJECTION | FUEL PUMP | INJECTOR
With the improved fuel injection distribution of modern cars today, less fuel is needed for the same power output. An engine's air/fuel ratio must be precisely controlled under all operating conditions to achieve the desired engine performance, emissions, driveability, and fuel economy expected. Modern electronic fuel-injection systems meter fuel very accurately, and use closed loop fuel injection system based on a variety of feedback signals from an oxygen sensor, a mass airflow, a throttle position TPS, and at least one sensor on the crankshaft and or camshaft to monitor the engine's rotational position for each cycle. An engine's air/fuel ratio must be precisely controlled under all operating conditions to achieve the desired engine performance.
Fuel injection generally increases engine fuel efficiency. The primary difference between carburetors and fuel injection is that fuel injection atomizes the fuel by forcibly pumping it through a small nozzle under high pressure, while a carburetor relies on suction created by intake air rushing through a venturi to draw the fuel into the airstream. A fuel-injected engine often produces more power than an equivalent carbureted engine. A multipoint fuel injection system generally delivers a more accurate and equal mass of fuel to each cylinder than can a carburetor, thus improving the cylinder-to-cylinder distribution. Fuel injection alone does not necessarily increase an engine's maximum potential output. Increased airflow is needed to burn more fuel, which in turn releases more energy and produces more power.
One of the first commercial petrol injection systems was a mechanical system developed by Bosch. This was basically a high pressure diesel direct-injection pump with an intake throttle valve set up. This system used a normal gasoline fuel pump, to provide fuel to a mechanically driven injection pump, which had separate plungers per injector to deliver a very high injection pressure directly into the combustion chambers of the cylinder head.
Operational benefits to the driver of a fuel-injected car include smoother engine response during quick throttle transitions, easier and more dependable engine starting, better operation at extremely high or low temperatures, increased maintenance intervals, and increased fuel efficiency.
Fuel injection systems can react rapidly to changing inputs such as sudden throttle movements, and are able to control the amount of fuel injected to match the engine's needs on demand across a wide range of operating conditions such as engine load, air temperature, engine temperature, fuel octane level, and atmospheric pressure which all contribute to the synchronization of the fuel injection set up.
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.
When cylinder-to-cylinder distribution is less than ideal, as is always the case to some degree with a carburetor or throttle body fuel injection, some cylinders receive excess fuel as a side effect of ensuring that all cylinders receive sufficient fuel. Rich-running cylinders are undesirable from the standpoint of exhaust emissions, fuel efficiency, engine wear, and engine oil contamination and injectors should be services periodically.
For more information and a Free quote CLICK HERE “Fuel Injection / Car Service / Motor Spares” Call Centre : 0861 7777 22
