there is no such thing as an external combustion engine.. the closest thing to it was the steam engine...
In terms of engines, an external combustion engine such as a steam engine burns fuel outside of the pressure cylinder used to drive the piston. An internal combustion engine such as a petrol or diesel engine burns the fuel inside the pressure cylinder used to drive the piston.
Internal combustion engine is where the fuel is ignited in the cylinder to make the piston move, petrol or diesel. A steam engine has an external pressure vessel to supply the steam to the cylinder to push the piston. the is no combustion in the engine as such.
The external combustion engine ( a steam engine is a good example) burns it fuel to create an energy source that is then transported (piped) to a device to create mechanical motion. The internal combustion engine burns its fuel inside the device creating the mechanical motion (piston car engines and Aircraft jet engines are two examples)
A stroke in an internal combustion engine is when a piston moves up or down.
It's complicated but I'll summarize. An internal combustion engine sucks in air and fuel when the piston goes down, compresses it on the upstroke and spark plug ignites the fuel/air mix causing the fuel to expand pushing the piston back down creating the force. A steam engine uses pistons and valves as well but the pressure comes from an external boiler and the steam pressure piped into the cylinder pushes the piston up and down.
The crankshaft is part of a piston engine, which can be either an internal combustion engine (one that runs on gasoline, diesel, propane, natural gas or carbon monoxide) or an external combustion engine (a steam engine). The pistons are connected to the crankshaft through connecting rods. The pistons turn the crankshaft, which creates the rotating motion you bought the engine for.
internal combustion piston engines
Hottest part is the piston crown....
An internal combustion engine is one where a gas/air mixture is ignited and burned in a closed cylinder, and forces a piston to move. In other words, all piston engines in cars, trucks, bikes aircraft.
A stroke.
Reciprocating engines (piston engines) are internal combustion engines. Rotary engines ( Wankel engine) is also an internal combustion engine. In general, all types of engines in which the combustion chamber is an integrating part of the engine is considered a internal combustion engine.
An opposed-piston engine is a reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head.Whereas the radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel.