Comparison of 2-stroke and 4-stroke engines, Other Engineering

Assignment Help:

COMPARISON OF 2-STROKE AND 4-STROKE ENGINES: Two-stroke engine possesses the following advantages over the four stroke type:

1.      Because of its valueless construction, the two-stroke engine is simpler, more compact, lighter and consequently cheaper to manufacture.

2.      Due to twice as many power strokes per revolution, compared to the four stroke type, it delivers smoother torque. However, at lower speeds, this may not happen due to poor scavenging which may give rise to 'four stroke' or irregular firing.

3.      The pet roil system of lubrication which has to be used in case of 2-stroke engines, is simpler.

  • However, the two-stroke engine has got certain disadvantages also.
  • The 'scavenging efficiency' of the two stroke engine is poor, it is not possible, it is not possible to completely purge the exhaust gases from the cylinder and fill it completely with the fresh intake mixture. This results in decreases volumetric efficiency.
  • There is greater tendency for the deposition of carbon on the exhaust ports, which further reduces the scavenging efficiency. This would mean that it completely with the fresh intake mixture. This results in decreased volumetric efficiency.
  • As there is one power stroke in one revolution for the deposition of carbon on the exhaust ports, which further has one power stroke in two revolutions. The cooling is comparatively more difficult. Thus, it has greater tendency to overheat.
  • As pet roil system of lubrication is not very efficient and it tends to the four stroke engine which has one power stroke in two revolutions, the cooling is comparatively more difficult. Thus, it has greater tendency to overheat.

 

 


Related Discussions:- Comparison of 2-stroke and 4-stroke engines

Electron gun, Electron gun: The electron gun consists of the following:...

Electron gun: The electron gun consists of the following: 1.  Cathode:  An indirectly heated cathode (negatively biased w.r.t. the screen). 2.  Grid:          A cylindric

Fundamentals of financial management, 4-7 DuPont and Net Income Ebersoll Mi...

4-7 DuPont and Net Income Ebersoll Mining has $6 million in sales, its ROE is 12%, and its total assets turnover is 3.2x. The company is 50% equity financed, and it has no preferr

Hanning window, what is a procedure of solving the questions using hanning ...

what is a procedure of solving the questions using hanning window while designing a fir filter?

Determine the log mean temperature, A tubular heat exchanger is being used ...

A tubular heat exchanger is being used for heating a liquid food from 30 o C to 70 o C. The temperature of the heating medium decreases from 90 o to 60 o C. a) Is the flow conf

Capacitive transducers, Capacitive transducers Consider a capacitor con...

Capacitive transducers Consider a capacitor consisting of two parallel conducting plates with an insulator in between. Its capictance is C = ε 0 ε r  A/d where ε

Water haedness, hardness of bore well water is less than sea water

hardness of bore well water is less than sea water

Electronics, square wave generator using op amp

square wave generator using op amp

Process control, I have an assignment which I need help with

I have an assignment which I need help with

Frequency warping, main difference between warping and without warping

main difference between warping and without warping

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