What is the difference between fuel injection and carburetor?
Unlike carburetors, a Fuel Injection system is comprised of a complex set of electronics and sensors. In carbureted systems the fuel gets drawn from the tank, while in a Fuel Injected system it depends on a fuel pump installed inside the tank for a fine-grained control over fuel flow.
What is the difference in operation between a multiport fuel injection system and a direct fuel injection system?
With multiport fuel injection, fuel atomizes as it’s sprayed into the intake port and then is pulled into the combustion chamber. With direct injection, the injectors are in the cylinder head and spray fuel directly into the combustion chamber, mixing with the air charge.
What is a multi point fuel injection system?
The MPFI is a system or method of injecting fuel into internal combustion engine through multi ports situated on intake valve of each cylinder. It delivers an exact quantity of fuel in each cylinder at the right time.
What is the main difference between an EFI engine and a carbureted engine?
In carbureted engines, the fuel/air mixture meets in the carburetor. The mixture then goes to each cylinder through the air intakes. In the fuel injected engine, the fuel and air do not mix until they reach the cylinder.
Which is better MPFi or GDi?
A GDI system also has more flexibility regarding when in the combustion cycle the fuel is added. MPFI systems can only add fuel during the intake stroke of the piston, when the intake valve is open. GDI engines also react more quickly to these changes in timing and amount of fuel addition, increasing driveability.
What is the difference between multi-point injection and direct injection?
The big difference is where the fuel mixes with the inlet air inside the engine. With conventional multi-point injection, there is a low-pressure fuel injector for every cylinder, located deep inside the inlet port in the cylinder head. With direct injection, only air enters the engine through the inlet port.
What are the different types of fuel injection system?
The fuel injection types used in newer cars include four basic types:
- Single-point or throttle body injection.
- Port or multipoint fuel injection.
- Sequential fuel injection.
- Direct injection.