Multi Point Fuel Injection System
Satha Siva Pandian . M
2nd year Mechanical Engineering
•To Supply a proper Ratio of Gasoline and Air to
•Without usage of Carburetor to mixing the Fuel and
air In SI Engine.
•Varied the Piston speed using Advanced sensors
Classification of MPFI
By the Placing of the injector it is further classified into two types.
I. Port Injection system .
II. Throttle Injection system
Port Type system
The Injector is Placed in the Intake Manifold near the intake Port .
The Injector Sprays Gasoline into the Air inside the manifold .
Fuel & Air mix in Uniform manner And this mixture Entered into
Engine Control Unit (ECU)
In General ECU in turn is controlled by the Data Input
From the set of sensors Located all over the engine & its
ECU primarily controls Ignition Timing & Quality of
Fuel to be injected.
ECU gives various commands to the Engine Fuel intake
system & Spark ignition system , To deliver an Over all
Satisfactory Performance of the engine From start to
Shut down including Emission Control .