TYPES OF ENGINE

The engine for the automotive use may be classified according to the following considerations:

1. Engine cycle.
2. Number of Strokes.
3. Fuel used.
4. Type of ignition.
5. Number and arrangement of cylinders.
6. Valve arrangement.
7. Type of cooling.

1. Engine Cycle

The tow commonly used on which the I.C Engines Operate are:

1. Otto Cycle.
2. Diesel Cycle.
1. Otto cycle. Theoretical Otto-cycle is shown in fig the cycle was orginally introduced by bean de rochas, but otto

ইঞ্জিন এর কিছু গুরুত্বপূর্ণ বিষয়

was the first to succeed in working an engine on this cycle. the cycle consists of  two adiabatics and two constant volume lines. At (1) Cylinder full of air. process (1)—(2) represents adiabatic compression of air. The combustion takes place at constant volum, from (2) to (3) after which the expands adiabatically from (3) to (4).
The air standard effciency