internalcombustionengines(編輯修改稿)
2025-08-11 19:22 本頁面
【文章內(nèi)容簡介】 is any engine that operates by burning its fuel outside the engine. 12 external and internal bustion engine 13 ? External bustion engine Fuel (chemical energy) burningheat energyoutside of boilerwatersteamforce the piston to move (mechanical energy). ? Internal bustion engine Fuel (chemical energy) burningheat energyinside of cylinderexpanding gasesforce the piston to move (mechanical energy). 14 elements which all ICEs rely on: Fuel: contains potential energy for operating the engine. Air :contains oxygen necessary for bustion. Ignition: it can start the bustion. 15 versus (1) Similarity: ① both are heat engines. ② energy transforms in the same way reciprocating motion to rotary motion (2) Differences: ① the fuel burns in different place ② the bustion rate 16 Early development (1) The first reciprocating ? a. in 1680, the first reciprocating . was made by Christian Huygens, a Dutch scientist. ? b. gunpowder explosion piston move upwardgases were cooledpiston move downward ? c. provided inventors with a fundamental idea (2) Static spark ignition ? a. In 1799, Philip Lebon patented the first successful gas engine. ? b. air and fuel ignited by an electric sparkpush the piston
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