Fuel injection system components (2023)

FAQs

What are the three main components of the 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.

A basic diesel fuel system is made up of five essential components. These are the tank, the fuel transfer pump, filters, the injection pump, and the injection nozzles.

There is a spring inside the conventional injector that holds the needle valve in close position. It holds this needle valve until high pressure line meet a specific value. There is a pipe called “fuel rail” that supplies pressurized fuel to the injectors. Right amount of fuel supplied to the required parts.

4-stroke internal combustion engine. 1:fuel injection, 2:ignition, 3:expansion(work is done), 4:exhaust.

Your vehicle can be equipped with one of the three most common injection systems on the market. GDI (Direct injection), SDI (Semi-direct injection) or TBI (Throttle body injection).

A medium or high speed diesel engine has such components and parts as engine body, crankshaft, connecting rod, piston, cylinder liner, heat exchanger, cylinder cover, high-pressure fuel pipe and alarm, connecting rod bolt, supercharger, fuel injection pump assembly.

The components of a diesel engine include pumps, mechanical pumps, high pressure pumps and common rail technology.

Manifold injection systems are common in petrol-fuelled engines such as the Otto engine and the Wankel engine. In a manifold injection system, air and fuel are mixed outside the combustion chamber so that a mixture of air and fuel is sucked into the engine.

Abstract: The purpose of the fuel injection system is to deliver fuel into the engine cylinders, while precisely controlling the injection timing, fuel atomization, and other parameters. The main types of injection systems include pump-line-nozzle, unit injector, and common rail.

A typical fuel injector is shown in Figure , It can be seen to be two basic parts, the nozzle and the nozzle holder or body. The high-pressure fuel enters and travels down a passage in the body and then into a passage in the nozzle, ending finally in a chamber surrounding the needle valve.

What controls the fuel injection system? ›

The fuel injection system operates on the common rail principle in which timing valves, operated by cams on the camshaft, control the injection of fuel from a high-pressure manifold through spring-loaded injectors to the cylinders (Figure 14.12).

Fuel injectors typically fail due to a buildup of contaminants such as carbon. Carbon build-up can cause a clogged or partially clogged injector, preventing the injector from closing all the way. This results in a drip that creates a misfire.

In this work, a single cylinder direct injection gasoline engine equipped with an electro-hydraulic valve-train system has been commissioned and used to achieve seven different operating modes, including: 4-stroke throttle-controlled SI, 4-stroke intake valve throttled SI, 4-stroke positive valve overlap SI, 4-stroke ...

VPS 3-Part Plus Fuel System Kit is formulated to clean the entire fuel and air intake system including throttle plates, ports, fuel injectors, intake valves and combustion chambers. Deposits in any of these critical areas can interfere with the proper operation of your engine.

Mechanical, electric, and high-pressure fuel pumps are the three types of fuel pumps. A fuel pump is a fluid handling device that moves gasoline from the fuel tank to the engine. It's often found in internal combustion engines.

EFI does exactly what it sounds like. It injects fuel directly into an engine's manifold or cylinder using electronic controls.

While 4-stroke engines perform well and generally last longer than 2-stroke engines, 2-stroke engines are lighter and faster than 4-stroke engines.

Four-stroke cycle used in gasoline/petrol engines: intake (1), compression (2), power (3), and exhaust (4).

What are the 10 parts of engine? ›

In short, injectors are solenoid operated valves that use Pulse Width Modulated (PWM) signals from the Engine Control Unit to open or close a valve that permits or blocks fuel flow to the engine. A well designed fuel injector ensures quick and complete combustion of fuel.

Typically injectors come in three sizes; 34, 48 and 60mm. These measurements are taken from the top of the lower O-ring to the bottom of the upper O-ring.

The Combustion Chamber

The heart and lungs of the engine, where air is sucked in and combined with fuel before being tumbled, swirled, compressed, burnt and then released to exhaust. It's known as the four-stroke Otto cycle.

There are three basic size groups of diesel engines based on power—small, medium, and large. The small engines have power-output values of less than 188 kilowatts, or 252 horsepower. This is the most commonly produced diesel engine type.

Most of these are four-stroke cycle engines, meaning four piston strokes are needed to complete a cycle. The cycle includes four distinct processes: intake, compression, combustion and power stroke, and exhaust.

The cylinder block is the most important component and is the basis of a car engine. The main function is to accommodate the crankshaft mechanism. Inside the cylinder block, you can find several engine cylinders, each of which is connected to the piston and crankshaft at the other end of the road.

Diesel fuel consists mainly of paraffins, aromatics and naphthenes. The hydrocarbons of gasoline contain typically 4-12 carbon atoms with boiling range between 30 and 210 °C, whereas diesel fuel contains hydrocarbons with approximately 12–20 carbon atoms and the boiling range is between 170 and 360 °C.

Explanation: The fuel flows from the fuel tank to the feed pump where the pressure is increased and then the fuel is filtered by the filter and then it is sent to the injector. Therefore the correct sequence of the fuel flow is fuel tank – feed pump – filer – injector.

What controls the fuel injector pulse? ›

A fuel injector firing

The amount of fuel supplied to the engine is determined by the amount of time the fuel injector stays open. This is called the pulse width, and it is controlled by the ECU.

It is between 35 and 65 pounds per square inch (psi) on most vehicles.

Your vehicle can be equipped with one of the three most common injection systems on the market. GDI (Direct injection), SDI (Semi-direct injection) or TBI (Throttle body injection).

The system basically consists of settling tanks, suction and discharge strainers, pumps, heating coils, seven valves to properly meter fuel and other assorted hardware. The four settling tanks are located in the after portion of the engine room.

A modern fuel injection system works by atomising the fuel at high pressure, mixing it with clean air as it passes the inlet manifold, before entering the combustion chamber of each cylinder. The key element of the electronic modern fuel injection system is the word “electronic.”

There are two types of mechanical fuel pumps: diaphragm-type fuel pumps and plunger-type fuel pumps.

The low-pressure components include the fuel tank, fuel supply pump and fuel filter. The high-pressure side components include a high pressure pump, accumulator, fuel injector and fuel injector nozzle.

Fuel oil is used for different things and is known by different names such as: Diesel fuel. Kerosene oil. Furnace oil.

Constituents of crude oil. Hydrocarbons are generally divided into four groups: (1) paraffins, (2) olefins, (3) naphthenes, and (4) aromatics (Figure 1.8). Among these groups, paraffins, olefins, and naphthenes are sometimes called aliphatic compounds, as different from aromatic compounds.