An electronic fuel injection system for providing variable injection timing for a compression ignition engine obtaining a per cylinder displacement volume of at least five.five liters includes individual fuel delivery mechanisms, such as a fuel pump having a continuous displacement fuel pumping chamber, and fuel injector for every single corresponding cylinder, and has a timing signal generator, such as a multi-track optical encoder coupled to a camshaft, for generating a timing signal and a cylinder index signal. Fuel injection is steadily replacing carburetors in these nations as well as they adopt emission regulations conceptually related to those in force in Europe, Japan, Australia, and North America. Additionally, on spark ignition engines (direct) fuel injection has the benefit of being capable to facilitate stratified combustion which have not been attainable with carburetors. Throughout that time period, the vast majority of gasoline-fueled automobile and light truck engines did not use fuel injection.
In the 1990s, it was common to plan engine controllers to adjust injection timing to optimize fuel consumption in heavy-duty diesel engines when the operating situations indicated highway cruise circumstances. With their very fast response time, several injection events can happen through each cycle of each cylinder of the engine. Improved mechanical efficiency of the injection method to contribute to the general target of improving engine efficiency.
Fuel injection also dispenses with the need to have for a separate mechanical choke , which on carburetor-equipped vehicles have to be adjusted as the engine warms up to regular temperature. Dual-fuel engines can be controlled using a mixture of each diesel and gas injection components. Hybrid injection can make up for the weakness of GDi and was 1st applied in Highlander, Camry, and Audi Q5 in China. Fuel is transported from the fuel tank (by way of fuel lines) and pressurised utilizing fuel pump(s). Several modern day EFI systems utilize sequential MPI nevertheless, in newer gasoline engines, direct injection systems are beginning to replace sequential ones.
The Bendix system is a direct descendant of the pressure carburetor However, alternatively of having a discharge valve in the barrel, it makes use of a flow divider mounted on best of the engine, which controls the discharge price and evenly distributes the fuel to stainless steel injection lines to the intake ports of every single cylinder.
When a uncomplicated carburetor system is less costly to manufacture than a fuel injection technique, the additional complicated carburetor systems installed on several engines in the 1970s were significantly additional expensive than the earlier easy carburetors. Although the other subgroup covers alternator and ignition method, timing belt, intake manifold + exhaust manifold, water pump + water hose, rocker arm + camshaft, cylinder head + valves, Oil pan + oil pump, piston + conrod, crankshaft + cylinder block. In piston aircraft engines, continuous-flow fuel injection is the most common type.