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1、分电盘点火与电子点火技术解析DistributorignitionandelectronicignitionDistributorismechanicallycontrolledignitiontimingofeachcylinder,whichhasarotorinelectricdiskrotating,therotatingshaftisdrivenbytheengineandspeedistheenginecrankshaftspeed1/2,contactisconnectedtothecylinders
2、parkplugaresequentiallyarrangedaroundthedistributor.Whentherotorinelectricplatetorotate,cansequentiallymakeeachcylindercontacttriggercurrentconduction,andthroughthehigh・voltagewireelectrictransmissiontothesparkplug,theignition.Distributorwillhaveaninertiaflywh
3、eelgroupspringtocontroltherotationspeedoftheenginewiththeignitionadvanceangleondifferentdisk,alsohasthevacuummechanismwithvaryingengineloadtocontroltheignitionadvanceangle.Nevertheless,becausetheignitionadvanceanglecontrolpointsofthepadaremechanical,inenginete
4、chnology,stillcannotbeaccurate,butthecostsof,alsohaveafewbelow2000c.c.engineusingdistributorignition.Althoughreliablemechanicalcomponents,butusedforenginecontrolsystemelectroniccomponentsmoreaccuratelyifthetotaldoesnot.Intheincreasinglystringentenvironmentalre
5、gulationsandconsumerontheperformanceofattention,thecarfactoryhaveadoptedelectronicignitionsystem,andotherelectroniccontrolsystem.Electronicignitioniseverytwocylinderoracylinderiscomposedofahighvoltageignitioncoilandresponsible,byECUonindividualignitioncoiligni
6、tionsignalissued,theignitionadvanceangleisderivedbytheECUaccordingtoengineoperatingconditionstocalculateaccordingtoengineoperation,flexibleadjustment;ifequippedwithaknocksensorfortheengine,ECUcanalsodirectlyastheangleofignitionadvanceordelayedactiononacylinder
7、.So,knocksensorcanonlybeinstalledinanelectronicignitionengine,becausetheadvanceangleofignitiondistributorisnotcontrolledbyECU.分电盘是以机械方式控制各缸的点火时机，其中有一转子在分电盘中旋转，其旋转轴是由引擎带动并且转速是引擎曲轴转速的二分之一，连接至各缸火星塞的接点则依序设置在分电盘四周。当转子在分电盘中旋转时，会依序使各缸接点之触发电流导通，并藉高压导线将电传送至火星塞，使火星塞点火。分
8、电盘上会有一个惯性弹簧■飞轮组来控制随着引擎转速不同之点火提前角，也有真空机构随着不同的引擎负荷来控制点火提前角。虽然如此，因为分垫盘的点火提前角控制皆为机械式，以引擎科技而言，还是无法称得上精确，但是因成本关系，也有少数2000c.c.以下的引擎采用分电盘点火。机械组件虽然可靠，但用来作引擎系统的控制总不若电子组件来得精确。在环保法规的日益严苛及消费者对性
