What is the difference between fuel pump and fuel injector?
What is the difference between fuel pump and fuel injector?
A fuel pump pressurizes fuel and sends it through the fuel line to the fuel injectors. The fuel injectors atomize the pressurized fuel and inject it into the combustion chamber.
What are the pressures on an in line fuel injection pump?
There are a number of different sizes of in-line injection pumps for the various en- gine outputs. The injected fuel quantity depends upon the swept volume of the injection-pump barrel, and maximum (pump-side) injec- tion pressures are between 400 and 1,150 bar. In-line fuel-injection pumps 16
How does the fuel pump and injector work?
The injection pressure of fuel to be injected into cylinder is controlled by the fuel injector; and the amount and timing of such injection is controlled by the fuel pump. This injection pressure of a fuel injector depends upon its spring setting set by the manufacturer. On another hand a fuel pump works based on the position of cam and camshaft.
How many cylinders does an in line pump need?
There are various requirements to be met by a in-line pump, such as: Feed pump to supply the fuel from fuel tank to the high pressure pump via a filter Nozzles to inject the fuel inside the combustion chamber Governor to vary the fuel quantity at varying speeds (usually a RSV governor) In-line pumps can have a set of 2 to 12 cylinders.
What are governors for in line fuel injection pumps?
The appropriate governors for the PE in-line injection pumps are dealt with in the Technical Instruction manual “Governors for Diesel In- Line Fuel-Injection Pumps”. PE standard in-line fuel-injection pumps Design and construction
What kind of pump does a fuel injection system use?
Certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems. Many of them use a fuel pump essentially identical to the carbureted fuel system’s. Some, however, use a vane type fuel pump mounted directly to the injection pump/fuel distributor assembly.
What should the pressure be in a fuel injection system?
The following characteristics of an injection system are desirable in achieving these goals: Injection pressures during the whole process should be above 1000–1200 bar for a good spray formation and air–fuel mixture; a tendency in practice to 1600–1800 bar and higher is noted.
What causes the fuel pump to stop injecting?
This pressure when reach a certain point, it lift the needle valve against the spring tension; injecting atomized fuel oil through nozzle. Injection delivery reduce the pressure drastically from the seating area of the needle valve; causing the fuel injection to stop.
How is the timing of fuel injection controlled?
Proper atomization with correct injection timing is essential for high combustion efficiency. The injection pressure of fuel to be injected into cylinder is controlled by the fuel injector; and the amount and timing of such injection is controlled by the fuel pump.
