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- A petrol engine is the most commonly used
- source of power for motor vehicles, it was
- introduced by the German engineers Gottlieb
- Daimler and Karl Benz in 1885. The petrol
- engine is a complex piece of machinery made
- up of about 150 moving parts. It is a
- reciprocating piston engine, in which a
- number of pistons move up and down in
- cylinders. Most engines have a water-cooling
- system, in which water circulates through
- channels in the cylinder block, thus
- extracting the heat.
-
- Subject by: Vince Pike
-