Working of Two Stroke Engine.

Don't Click Here: As per the strokes the automotive engines are mainly classified into two types:

1. Two stroke engines. Click Here: Kerala Kitchen (Cookery channel)
2. Four stroke engines.

In this topic we will be talking about the two stroke engine, the video clearly explained the two stroke engine working.

--Technical Videos--

Stroke 1

Stroke 2

Fig: 1, Working of two stroke engine.

The main component of a two stroke engines are (shown in fig: 1):

1. Piston. 
2. Crank Case.  
3. Connection rod.
4. Spark Plug.
5. Transfer Port.
6. In Let.
7. Out Let. 

Why is it called two stroke engine?Don't Click Here:

This is called two stroke engine as the power is produced in two strokes  (ie: one revolution of crank shaft, 180 degree). 

1. 1st stroke: In half rotation (90 degree).
2. 2nd stroke: Another half rotation (90 degree).  This total 180 degree (2 strokes) one power is produced.

Working of two stroke engine:

As shown in the fig:1 (1) shows that the piston is in TDC (top dear center) at this position as shown in the fig: 1 (1) you can notice that the In-let port is open. At this point the fresh charge enters the crank case through the In-let port and the same time the fresh charge gets compressed and combustion takes place at TDC (top dead center). So at this stroke when the piston is at TDC as mentioned below, three process are happening in a single stroke (1st stroke: 90 degree rotation of crank shaft).

1. Suction.
2. Compression.
3. Combustion. 

When the piston is at BDS, the fresh charge already entered the crank case in the previous stroke gets pre-compressed  and transfers through the transfer port as shown in fig: 1(2) and pushes the exhaust get put.

So in this stroke two process are involved (2nd stroke: 90 degree rotation of crank shaft).

1. Pre-compresion.
2. Exhaust.

Thus in two strokes, ie: 90 degree*2 rotation+ 180 degree = one power stroke (one power produced). --Technical Videos--