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.
How does a mechanical fuel injection system work?
Mechanical fuel injection. A high-pressure electric fuel pump mounted near the fuel tank pumps fuel at a pressure of 100psi up to a fuel accumulator. This is basically a short-term reservoir that keeps the fuel-supply pressure constant and also irons out the pulses of fuel coming up from the pump.
How does the direct gasoline injection system work?
Direct gasoline injection uses a conventional single-line, low-pressure fuel pump and integral pressure regulation system to supply fuel to a high-pressure mechanical fuel pump mounted on the engine, and uses separate sensors to monitor the low and high pressure portions.
What is the role of the fuel injection nozzle?
The injection nozzle has different actuation designs for various types of fuel injection systems. As fuel needs to be transferred from the fuel tank to the injector system, the role is low-pressure fuel system. Whereas, from the fuel injector to the combustion chamber is the high-pressure system.
What do you mean by electronic fuel injection system?
What is Electronic Fuel Injection System (EFI) A system which aims at optimizing fuel/air ratio entering a vehicles engine is referred as Electronic Fuel Injection System. EFI System has almost completely replaced usage of carburetors.
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.
How does a continuous flow fuel injection system work?
[Figure 10] The system consists of a fuel injector pump, a control unit, a fuel manifold, and a fuel discharge nozzle. It is a continuous-flow type, which controls fuel flow to match engine airflow. The continuous-flow system permits the use of a rotary vane pump which does not require timing to the engine. Figure 10.
How does a return style fuel injector system work?
Return style systems hold a big advantage in that with a vacuum/boost referenced fuel pressure regulator, the system can maintain a CONSTANT effective fuel pressure, which can extend the range of fuel injectors and help them function at lower fuel demands as well.