Bayani: RPM Sensor
Ana ƙayyade saurin injin ta mai sarrafawa bisa siginar da aka samar ta hanyar firikwensin saurin crankshaft.
Na'urar firikwensin yana aiki tare da dabaran motsa jiki na ferromagnetic kuma ana iya sanya shi akan crankshaft a ciki 
abin wuya ko jirgin sama. A cikin na'urar firikwensin, an raunata coil ɗin a kusa da wani ɗan ƙaramin ƙarfe mai laushi, wanda ƙarshensa yana da alaƙa da maganadisu na dindindin don samar da da'irar maganadisu. Layukan ƙarfi na filin maganadisu suna shiga ɓangaren gear na dabaran motsa jiki, kuma ɗimbin maganadisu da ke rufe juzu'in na'urar ya dogara da matsayin dangi na ƙarshen fuskar na'urar firikwensin da hakora da rata tsakanin haƙoran akan dabaran motsa jiki. . Yayin da hakora da makogwaro ke wucewa ta firikwensin, motsin maganadisu yana canzawa kuma yana haifar da musanyawar wutar lantarki ta sinusoidal a cikin jujjuyawar coil. Girman ƙarfin lantarki yana ƙaruwa tare da ƙara saurin juyawa. Firikwensin inductive yana ba ku damar auna saurin daga 50 rpm.
Tare da taimakon firikwensin inductive, kuma yana yiwuwa a gane wani matsayi na crankshaft. Don yiwa alama alama, ana amfani da wurin tunani, wanda aka yi ta hanyar cire hakora biyu masu jere akan dabaran motsa jiki. Haɓaka darajar tsaka-tsakin haƙora yana haifar da gaskiyar cewa canjin wutar lantarki tare da amplitude mafi girma fiye da girman ƙarfin lantarki da sauran haƙoran suka haifar da ƙirjin haƙoran haƙoran haƙora an ƙirƙira su a cikin iska na na'urar firikwensin.
Idan akwai saurin crankshaft guda ɗaya da firikwensin matsayi a cikin tsarin sarrafawa, rashin siginar yana sa ba zai yiwu a ƙididdige lokacin kunnawa ko adadin man fetur ba. A wannan yanayin, ba za a iya amfani da ɗayan ƙimar maye gurbin da aka tsara a cikin mai sarrafawa ba.
A cikin hadadden tsarin kunna allura, ana ɗaukar sigina masu maye gurbin daga na'urori masu auna firikwensin camshaft a cikin rashin sigina daga firikwensin matsayi na saurin gudu da crankshaft. An ƙasƙantar da sarrafa injin, amma aƙalla yana iya aiki a cikin abin da ake kira Safe Mode.
