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How are internal combustion engines and external combustion engines alike?
Wiki User
∙ 12y ago
Essentially, they are the same, pressurised gas in a closed cylinder forcing a piston along which turns a crank via a con rod converting linear to rotary force.
The main difference is how the pressurised gas is delivered:
In an internal combustion engine, fuel and air are sucked into the cylinder, valves are closed, fuel/Air is ignited, combustion takes place, heat makes pressure.
So the pressure by combustion is created inside the cylinder (internally)
In an external combustion engine, the gas is pressurised prior to entering the
cylinder, in the case of a (piston) steam engine, water is boiled (by coal or other fuel combustion) in a closed container (boiler) to create pressurised steam, which is then delivered to the cylinder under pressure.
So the pressure by combustion is created outside the cylinder (externally)
Wiki User
∙ 12y ago
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