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Lyn 8: Die verwantskap tussen die omwenteling van die nokas en die omwenteling van die [[krukas]] is van kritiese belang. Aangesien die kleppe die vloei van die brandstof-lugmengsel asook die uitlaat beheer, moet hulle op die regte tyd oop- en toegemaak word tydens die suierslag. Om hierdie rede word die nokas óf direk aan die [[krukas]] deur middel van 'n [[rat\|ratmeganisme]] verbind of indirek deur 'n band of ketting. In sommige ontwerpe dryf die nokas ook die [[vonkverdeler]] asook die olie- en [[brandstofpomp]]e aan. Op van die ouer [[brandstofinspuiting]]stelsels, het die nokke op die nokas die brandstofinspuiters aangedryf. <!--▼ For this reason, the camshaft is connected to the [[crankshaft]] either directly, via a [[gear]] mechanism, or indirectly via a belt or chain called a ''[[timing belt]]'' or ''[[roller chain\|timing chain]]''. In some designs the camshaft also drives the [[distributor]] and the [[lubricant\|oil]] and [[fuel pump]]s. Also on early [[fuel injection]] systems, cams on the camshaft would operate the fuel injectors. ▲<!-- In a [[two-stroke cycle\|two-stroke engine]] that uses a camshaft, each valve is opened once for each rotation of the crankshaft; in these engines, the camshaft rotates at the same rate as the crankshaft. In a [[four-stroke cycle\|four-stroke engine]], the valves are opened only half as often; thus, two full rotations of the crankshaft occur for each rotation of the camshaft.

Nokas: Verskil tussen weergawes