![]() This air-fuel mixture is then compressed in the combustion chamber, which also ignites it and produces mechanical power.According to the engine's needs, this air-fuel mixture is created and delivered to the combustion chamber. When fuel enters, the carburettor draws air from its surrounding area and combines it with the fuel to create an air-fuel mixture.A pressure regulator manages the fuel pressure in the fuel injector.But, for a SI engine, the injector first injects oil into the carburettor, which then creates an air-fuel mixture before sending it to the combustion chamber. With a diesel engine, fuel is directly injected into the combustion chamber by the fuel injector. Depending on how the engine is built, the fuel injector operates differently.So, they are put in a place where they won't be harmed by road conditions, weather, engine exhaust, or other auto elements. Furthermore, under the car's floor, these lines are visible, and they seem to be in areas at risk. This filtered oil is delivered through the fuel lines to the fuel injector, and plastic or sturdy metal is used for building fuel lines.Also, it avoids clogging the carburettor, fuel lines, and the fuel injector. This filter cleans the fuel to ensure it is free from debris.Fuel is first taken from the fuel tank by a fuel pump, which then filters the fuel.Nevertheless, a fuel system functions as follows: As a result, fuel is used inefficiently.Ībove all, this kind is undoubtedly superior to the single-point type for performance issues.Ī vehicle's fuel injection system takes care of ensuring that its engine receives the right amount of fuel. Even if a single cylinder is in the combustion phase, this will keep the fuel spraying. In other words, all injectors will spray fuel simultaneously. Though basic MPFI employs multiple injectors, they all spray their fuel at the same time or in groups. However, this kind has a drawback in that it only functions as a single point at a time. Sequential fuel injection, also called sequential port fuel injection (SPFI) or timed injection, is a type of multiport injection. However, the actuator is added more in this form.īecause each injector is located inside an intake manifold, fuel is delivered to the engine more efficiently with multi-point injectors (in front of the inlet valve). What is Sequential Fuel Injection Sequential fuel injection attempts to only spray fuel while the intake valve is open for the cylinder that is about to fire, which in most cases is only possible at low engine speeds between idle and low speed cruising. ![]() This scheme for multi-point injectors is equivalent to that for single-point injectors. In other words, this is an engine with four cylinders and four injectors. The fundamental difference between this kind and the first type is that the number of injectors is now matched to the count of cylinders. Compared to single-point fuel injection, this multi-point fuel injection (MPFI) is a more popular approach. ![]()
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