## How does electronic fuel injection system work?

An EFI system consists of a fuel pump, fuel injectors, sensors and an Engine Control Unit (ECU). Fuel gets pumped up from the tank via a fuel pump out to a fuel injection rail, then into individual injectors which are inserted directly into the intake manifold. The fuel injectors are controlled by the ECU.

### How does the ECM control fuel injection amount?

The ECU determines the amount of fuel to inject based on a number of sensor readings. Oxygen sensors tell the ECU whether the engine is running rich (too much fuel or too little oxygen) or running lean (too much oxygen or too little fuel) as compared to ideal conditions (known as stoichiometric).

#### How do you calculate fuel injection?

Calculate flow rate on pressure change

1. The formula to find the new FUEL FLOW rate after a fuel pressure change:
2. Example 1: A 240 CC injector tested at 43.5 PSI is run at 50 PSI.
3. So, the resultant change in pressure would yield the following: 240 cc/Min X 1.0721 = 257 cc/Min. 22.86 Lb/Hr X 1.0721 = 24.51 Lb/Hr.

What is the working principle of fuel injector?

Working principle of a conventional fuel injector: It lifts off its seat while spraying the diesel into the cylinder in highly atomized or mist form. The moment the pressure drops, the needle valve comes back to its seat, which causes the injection to stop. The injection nozzle has extremely critical tolerances.

What are the components of an EFI system?

There are three components of electrical efi, ie sensors, ECU and injectors. The sensors itself, have function as detecting device, which the results serve as a reference for the ECU to determine how long the injector opens/how much gasoline spray out of the injectors.

## What is electronic injector?

An electronically controlled unit injector (EUI) is a unit injector (UI) with electronic control. It performs the same function as a conventional unit injector in an internal combustion engine, such as in an on-road or off-road vehicle or a diesel-electric locomotive.

### What is the difference between an ECU and an ECM?

What is an ECM or ECU? ECM stands for engine control module, while ECU stands for engine control unit. While these two have a different name, the modules are essentially the same thing. These electronic modules control multiple systems of the vehicle, including the ABS, airbags, cruise control and air conditioning.

#### How do you calculate cc injectors?

of fuel per injector at an 80% (0.8) duty cycle. (300 X 0.5) รท (8 X 0.8) = 23.4 lbs./hr….Flow Rate Definition, Calculating Horsepower Range.

Injector Flow Rate Naturally Aspirated Engine Engine w/ Power Adder
52 lbs./hr. 610-775 hp 510-650 hp
60 lbs./hr 710-900 hp 590-750 hp

What are the main components of fuel injector?

Fuel Injection System Components

• Low-Pressure Side Components. Overview. Fuel Tank and Fuel Supply Pump. Fuel Filter. Fuel Heaters & Coolers.
• High-Pressure Side Components. Overview. High Pressure Pump. Accumulator. Fuel Injector and Fuel Injection Nozzle. Fuel Metering. Nozzle Needle Control Actuators.