Multipoint fuel injection in S.I engine
INTRODUCTION
The purpose of the system in vehicles is to provide a vaporized mixture of fuel and air to the engine for combustion. A fuel system is composed of the fuel pump, two fuel filters (one of which is a fuel strainer located in the fuel tank) pressure regulator, injectors, distribution pipe, fuel hoses and fuel tank. It supplies the necessary amount of the injectors at a constant pressure. This system also meters and injects the fuel into intake port according to the injection signals from the control unit.
For most of the existence of the internal combustion engine, the carburetor has been the device that supplied fuel to the engine and on many other machines such as lawn mowers and chainsaws it still is. But as the automobile evolved, the carburetor got more and more complicated trying to handle all of the operating requirement .In trying to keep with the emissions and fuel efficiency laws, the fuel system has changed a lot over the years. With the failure of carburetor system, there was gradual evolution of MPFI system that has totally replaced the carburetor system.
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