Explain the difference between si and ci engines, Mechanical Engineering

Assignment Help:

Difference between SI and CI engines

SI engine stands for spark ignition engine while CI engine stands for compression ignition engine.

SI engine works on the principle of working of the theoretical Otto cycle, while CI engine works on the principle of theoretical Diesel cycle.

In a SI engine, the fuel and air mixture is drawn into the cylinder during the suction stroke, while in a CI engine only pure air will be drawn during the suction stroke.

In a SI engine, the compression of the petrol and air mixture is less so that the heating of the mixture will be less than the ignition temperature of the fuel, where as in CI engine pure air will be compressed to very high pressure to attain a temperature greater the Ignition temperature of the diesel oil (higher compression ratio).

In a SI engine, the fuel-and-air mixture will be ignited by the spark plug, while in a CI engine the heat of the compressed air will auto ignite the diesel oil.

 


Related Discussions:- Explain the difference between si and ci engines

Describe shear force and bending moment, Describe the following terms:- ...

Describe the following terms:- a) Shear force and bending moment b) Concentrated load, Uniformly varying load and Uniformly distributed load c) Beam & Types of beam. d)

Pp, matle cutting

matle cutting

Classification based on mode of welding, Classification Based on Mode of We...

Classification Based on Mode of Welding Manual welding: In this welding the entire welding operation is performed and controlled by hand. Here, there are two movements involv

Show produced water de-oiling unit, Q. Explain about water De-Oiling proces...

Q. Explain about water De-Oiling process? The De-Oiling process consists of three major components: The Surge and Skim Tank which reduces PW oil content to 100 ppm I

Violation of clausius statement - thermodynamics, Equivalen t of Kelvin Pl...

Equivalen t of Kelvin Plank and Clausius statement: The Kelvin plank and clausius statements of the second law and are equivalent in all the respect. The equivalence of state

Battery electrolyte and gases and brake fluid safety tips, Battery Electrol...

Battery Electrolyte and Gases Battery emits explosive gases, keep sparks and flames away. Ensure adequate ventilation while charging the battery. Brake Fluid Spilling

Quality of welds produced by submerged arc welding, a) You have been assign...

a) You have been assigned to design a robotics spot welding experiment for low carbon steel sheets. You found an experimental power source for spot welding process which is designe

Torsion, diameter = 100mm length = 470mm power = 4000 w radians = 78 shear ...

diameter = 100mm length = 470mm power = 4000 w radians = 78 shear modulus 60000 n/mm^2 determin the maximum shear stress and angle of twist

Friction is desirable, Friction is Desirable: A friction is much de...

Friction is Desirable: A friction is much desirable to stop the body from its moving condition. If there is no friction between contact surfaces, then the body cannot be st

Define corrosion-resistant nickel-based alloys, Q. Define corrosion-resista...

Q. Define corrosion-resistant nickel-based alloys? The corrosion-resistant nickel-based alloys offer a significant improvement in corrosion resistance to sulphuric acid over th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd