owners manual BMW 3 E21

owners manual BMW 3 E21 - year of production: 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983 - BMW 3 E21 316 318i 320 323i owners manual EN

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text version of content this owner's manual page from owners manual to the vehicle BMW 3 E21, year of production 1975 - 1983:

ILL ::'peclTlcatlons BMW318i, 323i-fuelinjection distributormaintainsline pressureat ap- nal airslidevalvewhichhavetheeffectof system prox.4.7baraboveatmosphericpressure, increasingtheamountoffuelinjected. andreturnsexcessfuelto thetank.In this YourBMWis equippedwith'K-Jetronic' In addition,an electromagneticstarting continuous-actingmechanicalfuelinjec- way, fuel free from vapor bubblesis valve operatedby a temperature/time tion.Thissystemmeasuresthevolumeof alwaysavailableat theinjectors. switchenrichesthemixturestillfurtherfor air drawnintotheengineand injectsthe From the fuel flow distributorthe fuel actualstarting,duringa periodof time • correctproportionof fuel to form the passesthroughthe injectorlinesto the dependenton enginetemperature. combustionmixture.The fuel and air injectors.Thestartingvalveis linkedtothe 3. Injectors combinein the intaketractsto makeup fuelflowdistributorby a hose. thismixture.Thefuelis injectedjustahead If thetankruns dry,the systemdoesnot Each injectoropensat a pressureof 3.3 of the inletvalves underpressure,and is need to be bled, but the startermotor bar aboveatmosphericpresure,and in- thus finelyatomised.The normalfour- mustbe rununinterruptedly(max. approx. jectsfuel intothe inlettract. strokecombustioncyclethentakesplace 20seconds)untiltheenginestarts. in the cylinderas usual. 4. Intakeair supply 1. Fuel delivery 2. Coldstartingand warmingup Intakeairforcombustionis drawnin via a f large-capacityair cleanerandsilencer,the Fuel is drawnfromthetankby an electric For cold starting,the enginerequiresa airflowmeter,the throttlebutterflystub fuel deliverypump,and deliveredto the muchrichermixturethanusual. The pro- pipe. theaircollectorboxandtheintakeair fuelflowdistributorby wayofa reservoir portionsoffueland air are controlledby . pipes, beforepassingintothecylinderof and a fuel filterin the pressureline. A thewarming-upregulatorand an additio- the engine. systempressureregulatorin thefuelflow

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year of production from: 1975

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