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No, the steam engine is an external combustion engine because the steam is heated by heat generated by combustion outside externally through heat transfer. A spark ignition engine is an example of an internal combustion engine.
In an internal combustion engine, the provided energy is chemical energy. By means of combustion it is transformed into heat energy. This heat energy is transformed in to motion/kinetic energy in an internal combustion engine.
An internal combustion engine
internal and external combustion engine
internal and external combustion engine
The diesel engine doesn't have any spark plugs, and uses heat generated during compression to ignite the fuel. The diesel however, is an internal combustion engine.
the internal combustion engine works by converting chemical energy (fuel) into heat energy. the heat energy then expands the compressed air to drive the piston down. typically a third of this heat goes straight out of the exhaust, which is why the exhaust gets hot. another third of the heat is absorbed into the engine, hence the need for a cooling system which means that only a third of the heat generated is used to drive the psiton down making the internal combustion engine only about 33% efficient. robb
heat engine: steam, internal combustion, turbines, etc
Spelled as diesel, this type of internal combustion engine uses the heat of compression to ignite the air/fuel mix, and has no spark plugs.
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Thermal energy is just heat. To convert it to mechanical energy you need some sort of heat engine, like an internal combustion engine or a gas turbine.