CI engines are operated unthrottled, with engine speed and power controlled by the amount of fuel injected during each cycle. … Air Injection System: In this system, fuel is forced into the cylinder by means of compressed air. This system is little used nowadays, because it requires a bulky multi-stage air compressor.
How fuel injection systems are classified in CI engines?
In usual Compression Ignition engines, the air is compressed in the cylinder during the compression stroke, at the end of the compression stroke the fuel will be injected into the cylinder with the help of fuel injection system.
What are the components of a fuel injection system?
Abstract: The fuel injection system can be divided into low-pressure and high-pressure sides. 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.
What is main purpose of fuel injection system in CI 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.
What are the basic requirements of fuel injection in CI engine?
Functional requirements of a fuel injection system
Correct fuel injection timing. Full control over rate of fuel injection. Proper atomisation of the fuel. Proper spray pattern to ensure mixing of air and fuel.
Is fuel injector used in CI engine?
The injection pump sends fuel under pressure to the nozzle pipes which carry fuel to the injector nozzles located in each cylinder head. … CI engines are operated unthrottled, with engine speed and power controlled by the amount of fuel injected during each cycle.
Is fuel pump used in CI engine?
Early CI engines used air pressure to deliver the fuel into the cylinder, but nowadays liquid fuel, supplied by a reciprocating plunger pump, is delivered through small bore steel pipelines to the injector, which breaks up the fuel to the required degree and deliver it to combustion region in the chamber.
What are the two basic types of fuel injection systems?
There are two basic types of fuel injection systems used on passenger cars and light trucks, multiport fuel injection and throttle body fuel injection.
What is the function of fuel injection pump?
An Injection Pump is the device that pumps fuel into the cylinders of a diesel engine. Traditionally, the injection pump was driven indirectly from the crankshaft by gears, chains or a toothed belt (often the timing belt) that also drives the camshaft.
What is the main function of the fuel system?
The function of the fuel system is to store and supply fuel to the cylinder chamber where it can be mixed with air, vaporized, and burned to produce energy.
What are the advantages of fuel injection system in SI engines?
Fuel injection allows precise fuel metering, which increases efficiency. Maintaining a stoichiometric is necessary for the operation of a three-way catalyst, which destructs most of the harmful emissions. In regions where quality fuel is used, there are rarely any clogging or other problems.
What are three types of fuel injection systems?
The three major types of fuel injection are known as throttle body injection, multiport injection, and direct injection.
What are the types of fuel injection system?
What Are The Different Types of Fuel Injection?
- Single-point or throttle body injection.
- Port or multipoint fuel injection.
- Sequential fuel injection.
- Direct injection.
What is the requirements met by the injection system?
iii) Proper control of rate of injection: The desired heat – release pattern is achieved during combustion. iv) Proper atomization of fuel into very fine droplets. v) Proper spray pattern to ensure rapid mixing of fuel and air. vi) Uniform distribution of fuel droplets throughout the combustion chamber.
What are the types of multi point fuel injection system?
There are three types of MPFI systems – Batched, Simultaneous and Sequential. In the batched MPFI system fuel is injected to the groups or batches of the cylinders without bringing their intake stroke together.
What is delay period in CI engine?
Explanation: Delay period is defined as the time immediately following injection of the fuel during which the ignition process is being initiated and the pressure does not rise beyond the value it would have due to compression of air.