Disadvantages of two stroke engine, Mechanical Engineering

Disadvantages of two stroke engine:

The following are some of the disadvantages of two stroke engine when compared with four stroke engine:

1. As firing takes place in every revolution, time offered for cooling will be less than in a four stroke engine.

2. Incomplete scavenging results in mixing of exhaust gases with the fresh charge which will dilute it, hence less power output is obtained.

3. Since transfer port is kept open during a short period, less quantity of charge will be admitted into cylinder which will decrease power output.

4. Since both exhaust and transfer ports are kept open during same period, there is a possibility of escaping of the fresh charge through the exhaust port which will reduce the thermal efficiency.

5. For a given stroke and clearance volume, effective compression stroke is less in two stroke engine than in a four stroke engine.

6. In crankcase compressed type of 2 stroke engine, the volume of charge down into crankcase is less due to the reduction in the crankcase volume because of rotating parts.

7. A fan scavenged two stroke engine are having less mechanical efficiency as some power is required to run the scavenged fan.

8. A two stroke engine needs better cooling arrangement due to high operating temperature.

9. A two stroke engine consumes more lubricating oil.

10. The exhaust in two stroke engine is noisy because of sudden release of the burnt gases.

Posted Date: 10/15/2012 5:20:26 AM | Location : United States







Related Discussions:- Disadvantages of two stroke engine, Assignment Help, Ask Question on Disadvantages of two stroke engine, Get Answer, Expert's Help, Disadvantages of two stroke engine Discussions

Write discussion on Disadvantages of two stroke engine
Your posts are moderated
Related Questions
A pull up door is stuck in the closed position. A strap, fastened on the inside bottom and located at the center of the door is pulled outward at an angle of 45 deg above horizonta

Induction Heating: Alternating current throughout induction coil adjacent the part to be treated induces eddy current via the part that is so heated. The benefit of such heati

Advantages of Laser Welding Process   1) Narrow deep penetration welds capable of being produced in atmosphere. 2) Low thermal distortion - due to less heat input and paral

Types of Holons The four major types of holons are: Order holons Product holons Resource holons Staff holons Considering the cooperative aspect of the

Design a concrete pedestal for a steel column carrying a dead load of 600 kN and an imposed load of 600 kN. Assume the base plate is 350 mm x 350 mm M20 grade concrete and F e , 41

Q. Describe Fire clay and Kaolinite Binders? Fire clay : Fire clay is refractory clay usually found in the coal measures. Kaolinite: Its general composition is al 2 o 3

Mas s Flow Rate (m ): In absence of any mass getting stored system we can write; Mass flow rate at inlet = Mass flow rate at outlet That is, m f1  = m f2 as m f  = d

Q. Mechanical Properties of high temperature strength of metals? The high temperature strength of metals is related to their melting points, but many other factors limit the pr

Q.   Give the expression for inductance of a ? N ?    turn coil wound on a core having length I cross - sectional area A and magnetic permeability µ. Explain the significance of

In designing piping systems, it is sometimes desirable to estimate the appropriate pipe length for a given diameter, pump power and flow rate. In such cases, if minor pipe losses a