汽车电子--点火线圈变压器结构原理.pdf

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1、producttrainingignitiontransformerOct.2007producttrainingignitiontransformerSession1:Basicfunctionofgasolinefourstrokeengineandthefunctionofignitionsystem.Objectivetarget:Torecognizewhatanmodernignitionsystemdointheengine.Oct.2007Positionandfunctionofande

2、ngineinacarcardanshaftFirstofalltheengineofacarisresponsibletoengineproducetheforceandthepowertomovethecar.Theyarealsoresponsibletochargethebattery,topowertheairconditioner,topowerthesteeringboosterandsoon.gearboxaxisOct.2007Historyof4strokegasolineengine

3、first4stokeenginecarenginemodernracingengineapprox.186719671997Oct.2007Futureof4strokegasolineengineEngineBMWS65Cylinders/valves8/4Capacityinccm3.999Stroke/boreinmm75.2/92.0Max.outputinkWat1/min309(420)/8,300Max.torqueinNmat1/min400/3,900Ignitioncoilwithi

4、ntegratedioncurrentsensingmadebypulse.ThiscoilisusedinthenewS65engineofBMWstartofproduction2007Oct.2007elementaryfunctionofan4strokegasolineengineStep1:Step2:Step3:•Step4:•Intakevalveopens•Intakevalvecloses•Ahighvoltageis•Theexhaustvalve•Pistonmoves•Pisto

5、nmovesupappliedtothesparkopensdownplug•Themixtureofair•Thepistonmovesup•Amixtureofairandgasolineis•Asparkoverbetween•Becauseoftherisingandgasolinegetscompressedtheelectrodeshappenspressuretheexhaustintothecylinder•Thesparkoverisverygasismovedoutofbecauseo

6、fthelowhotandignitesthethecylinderpressurefuel-airmixture•BecauseoftheexplosionthepistonmovesdownOct.2007elementaryfunctionofan4strokegasolineengineStep1:•Intakevalveopens•Pistonmovesdown•AmixtureofairandgasolinegetsintothecylinderbecauseofthelowpressureO

7、ct.2007elementaryfunctionofan4strokegasolineengineStep2:•Intakevalvecloses•Pistonmovesup•ThemixtureofairandgasolineiscompressedOct.2007elementaryfunctionofan4strokegasolineengineStep3:•Ahighvoltageisappliedtothesparkplug•Asparkoverbetweentheelectrodeshapp

8、ens•Thesparkoverisveryhotandignitesthefuel-airmixture•BecauseoftheexplosionthepistonmovesdownOct.2007elementaryfunctionofan4strokegasolineengineStep4:•Theexhaustvalveopens•Thepistonmovesup•Becauseoftherisingpressure