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

Find the inner diameter of the tubular steel shaft, Find the inner diameter...

Find the inner diameter of the tubular steel shaft: A solid aluminium shaft having 1 m long & of 50 mm diameter is to be replaced by a tubular steel shaft of the similar lengt

Factors in the design of high temperature materials, Q. Factors in the desi...

Q. Factors in the design of high temperature materials? There is typically little correlation between room temperature strength and high temperature strength of creep-resistant

Draw shear and moment diagrams, Determine the analytical solution for the m...

Determine the analytical solution for the maximum stress of the beam shown; compare with stress results from SolidWorks. Draw shear and moment diagrams and print them from the beam

Types of bridges, Types of Bridges and their Suitability: Bridging is ...

Types of Bridges and their Suitability: Bridging is a specialized filed of engineering science. It has very high degree of sill and expertise in this field, gathered from brid

Illustrate masons gain formula, i) Illustrate forward path and self loop. ...

i) Illustrate forward path and self loop. ii) Describe transfer function. iii) Which feedback is preferred and why. iv) Write the properties of signal flow graph. v) Il

Resultant of non coplanar concurrent force system, Resultant of Non coplana...

Resultant of Non coplanar concurrent force system: How do you find resultant of Non coplanar concurrent force system? Sol.: The resultant of non concurrent force system

Determine the dead load - sewer construction, Determine the dead load: ...

Determine the dead load: A 250 mm diameter sewer is placed in a 2.75 m deep rectangular trench that is 0.65 m wide. This trench is backfilled with saturated clay having a unit

Determine the steady state amplitude of vibration, 1. (a) Sketch frequency-...

1. (a) Sketch frequency-response curves for a damped single degree of freedom system subjected to a harmonic excitation under three different damping ratios. The system has a natur

What do you mean by centrifugal casting, What do you mean by centrifugal ca...

What do you mean by centrifugal casting ? How are the centrifugal method classified ?

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