Four Stroke Engine Essay

TERM PAPER
On

Title: Petrol Engines

Submitted to

AMITY SCHOOL OF ENGINEERING AND TECHNOLOGY

Guided By: Submitted By:

Mr. Mohit Bansal Aayesh Malhotra

Aset Department 3MAE-1Y

Amity University, Uttar Pradesh

ACKNOWLEDGEMENT

I take immense pleasure in thanking Amity University, Uttar Pradesh for having permitted me to write this term paper on the topic of ‘Petrol Engines’.
I wish to express my deep sense of gratitude to my Internal Guide, Mr. Mohit Bansal for his able guidance and useful suggestions, which helped me in completing this term paper, in time.

CERTIFICATE
This is to certify that Mr. Aayesh

Advantages of two stroke engines
1. Two stroke engines are easy to manufacture and operate.
2. The number of working strokes is twice than that in four stroke engine.
3. Two stroke engine occupies less space, needs lighter foundations and requires few spare parts.
4. Two stroke engines are much easier to start.
5. Initial cost of two stroke engines is less due to light weight and absence of valve mechanism.
6. Less friction due to absence of suction and exhaust strokes, higher mechanical efficiency.

Disadvantages of two stroke engines
1. Exhaust and inlet parts are open simultaneously and some fresh charge is likely to escape without work output.
2. Thermal efficiency of two stroke is lower due to some charges escaping without burning, decreases performance and slow combustion pressure.
3. More wear and tear of moving parts due to double number of strokes.
4. Noisy exhaust due to sudden release of burnt gases.

Fig.6
COMPARISON OF PETROL AND DIESEL