| | Internal combustion engine (Site not responding. Last check: 2007-10-31) |
 | | A piston internal combustion engine works by burning hydrocarbon or hydrogen fuel that presses on a piston; and a jet engine works as the hot combustion products press on the interior parts of the nozzle and combustion chamber, directly accelerating the engine forwards. |
 | | Jet engines, most rockets and many gas turbines are classed as internal combustion engines, but the term "internal combustion engine" is often loosely used to refer specifically to a piston internal combustion engine in which combustion is intermittent and the products act on reciprocating machinery, the most common subtype of this kind of engine. |
 | | In the broadest sense of the term, the internal combustion engine can be said to have been invented in China, with the invention of fireworks during the Song dynasty (some sources put the invention a thousand years earlier still). |
| internal-combustion-engine.en.exsugo.org (244 words) |