The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to the mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine).
What does CI engine stand for?
Ignition. Internal combustion engines require ignition of the mixture, either by spark ignition (SI) or compression ignition (CI).
What is the difference between SI engine and CI engine?
The Spark Ignition (SI) engine, as its name indicates uses spark to ignite the fuel. … And in Compression Ignition (CI) engine, the air is compressed within the cylinder and the heat of this compression air is used to ignite the fuel.
Why there is no spark plug in CI engine?
For less calorific value we do not get more horse power. But diesel have more heat developed during combustion thus developing more power than petrol engines. Thus there is no need of Sparking the air- fuel mixture in the diesel engine.
How does CI engine works?
Diesel vehicles are similar to gasoline vehicles because they both use internal combustion engines. … In a compression-ignited system, the diesel fuel is injected into the combustion chamber of the engine and ignited by the high temperatures achieved when the gas is compressed by the engine piston.
What is CI engine for?
Compression ignition (CI) engines
Near TDC of the compression stroke, fuel is injected directly into the cylinder using a high-pressure fuel injector. … Load is controlled in a CI engine by the amount of fuel injected limited by the amount of charge gas oxygen.
What does CI mean?
Customer intelligence (CI) is information derived from customer data that an organization collects from both internal and external sources. The purpose of CI is to understand customer motivations better in order to drive future growth.
Which is better CI or SI engine?
Thermal efficiency: Due to lower compression ratio, maximum value of thermal efficiency is lower in an S.I engine compared to that of C.I. 7… Weight : S.I engines are generally lighter in weight due to their lower peak pressures as compare to C.I engines that are generally heavier, due to higher peak pressure.
Which engine is more efficient CI or SI?
CI engines have higher Thermodynamic Efficiency
With a higher compression ratio in CI engines as compared to SI engines, CI engines have a higher thermodynamic efficiency since more work is done with each expansion stroke.
Which engine is more powerful?
In very simple terms, higher horsepower translates to a higher top speed and a faster car. Conversely, a higher torque figure translates to more power at a lower RPM. When this is taken into consideration, diesel engines are the more powerful of the two.
Why diesel engines have more torque?
Diesel engines are turbocharged to make for the lack of horsepower. It increases the amount of air entering the engine meaning more compression inside the engine. This creates higher pressure in the cylinders, which in turn increase the torque.
Why does fuel ignite when there is no spark in the diesel engine?
Air heats up as it is compressed. Squeeze enough of it quickly enough within an engine cylinder and the temperature and environment will be just right for it to ignite fuel without the need of a spark. This is what happens in a diesel engine.
Can diesel ignite from a spark?
If the temperature of the environment or other heat sources cause the fuel to heat above its flashpoint (varies by type of diesel)l, it will start giving off diesel fumes that are flammable, and then, yes, it will ignite with a spark or flame.
Is fuel pump used in CI engine?
CI Engine Fuel Supply System
The high-pressure pump is the main and the most complicated component of the fuel system. … Both coarse filters and fine filters are used for filtration of the fuel oil. The fuel feed pump transfers fuel from the tank to the high-pressure pump (injection pump).
What is not used in CI engine?
Explanation: Methanol is not used in CI engines because of its high octane number and low cetane number. Pure methanol and gasoline in various percentages have been extensively tested in engines and vehicles for a number of years.
Which is part of CI engine?
Main Components of Compression Ignition Engine
Exhaust Valve: The whole burnt or exhaust from the cylinder thrown out through exhaust valve. Combustion chamber: It is a chamber where the combustion of fuel takes place. Piston: It is reciprocating part of CI engine which does reciprocating motion inside the cylinder.