The two stroke engine completes its cycle of operation in one revolution of the crankshaft or two strokes of the piston. The intake and exhaust processes of four stroke engine are look after by the incoming fresh charge. It is compressed in the crank case or by means of a separate blower whereas the engine piston is present near the bottom dead centre. The engine piston compresses the fresh charge and expands the product of combustion.
The mechanical construction is simplified with the help of the piston in two stroke engines as a slide valve in conjunction. It is along with intake and exhaust ports to cuts of the cylinder side.
The petrol engine works on two strokes. The first one is Stroke 1A, Piston BDC (Bottom Dead Centre is at the lowest point within the cylinder. The air, petrol, and oil mixture is forced into the cylinder and exhaust gases are made to drive out. The second one is Stroke 1B where the piston moves upwards to cover the air intake and exhaust ports closing them.
The engine ignites fuel in the upward stroke and hence there are two strokes for ignition of fuel and they are known as upward and downward stroke. If the piston moves in upward direction from down to top in the first stroke then the air and fuel mixture compressed and ignited with a spark plug where as upward stroke comes to end.
Thermocouples device is mounted on different fields of the engine that measures stroke temperatures. Engine speed indicator measures the number of revolution per minute of the engine shaft. It is done with the help of a speed sensor displayed in the digital indicator.
Conclusion:
This Mech Project & PPT on DESIGN AND ANALYSIS OF A TWO STROKE PETROL ENGINE TEST RIG Mechanical project is built up for laboratory purpose to check the performance of two stroke petrol engines at environmental conditions.
Download Mech Project & Ppt on Design and Analysis of a Two Stroke Petrol Engine Test Rig