I went to a car show in lahore. I went to a car show for the first time. I was so pumped as i love cars, have a look
Sunday 18 February 2018
Tuesday 6 February 2018
Four stroke.
Ever wondered that what is men't by four stroke engine? Well i'll tell you. Four stroke is basically the working of the pistons in petrol and diesel engine. I will explain it with petrol engine.
1- Intake stroke.
2- Compression stroke.
3- Power stroke.
4- Exhaust stroke.
* Intake Stroke:
The cycle starts in intake stroke in which the piston moves outward and petrol air mixture is drawn through an inlet valve into the cylinder from the carburetor.
* Compression Stroke:
On the compression stroke,the inlet valve is closed and the mixture of air and petrol is compressed by the inward movement of the piston.
* Power Stroke:
An electric spark is produced by the sparking plug. On the power stroke a spark fires the mixture causing rapid increase in pressure and temperature. The burning mixture expands and forces the piston to move outwards. This is the only working stroke in the cycle which delivers power to the crankshaft to drive the flywheel.
* Exhaust Stroke:
In the exhaust stroke, the outlet valve opens. The residual gases are expelled and the piston moves outward. The cycle then begin again.
1- Intake stroke.
2- Compression stroke.
3- Power stroke.
4- Exhaust stroke.
* Intake Stroke:
The cycle starts in intake stroke in which the piston moves outward and petrol air mixture is drawn through an inlet valve into the cylinder from the carburetor.
* Compression Stroke:
On the compression stroke,the inlet valve is closed and the mixture of air and petrol is compressed by the inward movement of the piston.
* Power Stroke:
An electric spark is produced by the sparking plug. On the power stroke a spark fires the mixture causing rapid increase in pressure and temperature. The burning mixture expands and forces the piston to move outwards. This is the only working stroke in the cycle which delivers power to the crankshaft to drive the flywheel.
* Exhaust Stroke:
In the exhaust stroke, the outlet valve opens. The residual gases are expelled and the piston moves outward. The cycle then begin again.
Petrol and diesel engine.
Diesel engine named after Rudolf Diesel. In a diesel engine no spark plug is needed. Diesel is sprayed into the cylinder with air. Because the air is at very high temperature immediately after compression, the fuel mixture ignites on contact with the air inside the cylinder and pushes the piston upward. The operation of a diesel engine is quite simple and it's efficiency is greater than that of petrol engine.
Petrol engines require a spark plug to ignite the fuel and air mixture. When fuel is injected in the cylinder through fuel injectors, it is compressed with air by pistons. Then the whole mixture of petrol and air is ignited by a spark plug. A spark plug fires the mixture causing a rapid increase in pressure and temperature. This mixture expands and forces the piston to move outward. Which delivers the power to the crankshaft to drive the flywheel.
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