10%20IHKR%20E39, BMW educational info, Dokumentacja
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//-->Table of ContentsBMW FEATURESSubjectPage• E39 IHKR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .02• System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 02• E39 IPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 03• Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 04--------Air DistributionBlower AdjustmentTemperature ControlFresh Air / RecirculationAir ConditioningRear Window DefrosterWasher Jet HeatingK-Bus CommunicationsRevision Date:12/00E39 IHKRThe 525i/it will be fitted with IHKR as standardequipment. IHKA will be available as an optionon those vehicles by ordering the Conveniencepackage: SA 466.IHKR is a semi-automatically regulated heatingand air-conditioning system. The componentsare similar to the IHKR system used in the X53.0i.The E39 IHKR is a single zone system that regulates the temperature of the cabin basedon the occupants desired temperature, selected by a temperature setting dial. Blower con-trol, air distribution settings and stratification flap are manual.System ComponentsThe E39 IHKR consists of the following components:••••••••••••2IHKR control unit with operating controlsIHKR integrated heater and air conditioning case1 Heater core temperature sensorEvaporator temperature sensorInterior temperature sensor (located in drivers footwell)Double cage blower motor and final stage1 Water valve (duty cycle controlled)Auxiliary water pump1 Fresh air/re-circ stepper motorAuxiliary fan (DME controlled)Refrigerant Pressure SensorLeft and right fresh air micro-filters132001 model year changesE39 IHKR I.P.O.K-BUSWASHER JET HEATERKL31KL30-+KL15BLOWER MOTOR OUTPUT STAGEFAN SPEED+MA/C REQUESTAUXILIARY WATER PUMPRECIRCULATIONME39IHKRREAR DEFROSTWATER VALVE724580TEMPERATURECONTROLFRESH AIR/RECIRC MOTOREVAPORATORTEMPERATURETEMPREAR WINDOW DEFROST RELAYREFRIGERANT PRESSUREKL 30KL 15HEATER CORETEMPERATURECOMPRESSOR CONTROLINTERIOR TEMPERATURE(FOOTWELL)LCM58GCOMPRESSORSHUT OFF/ONKORELSIGNALK-BUSDSC IIIkjhsdfkhsdflkhsdlkfjhlkjghkglkdkfljdflkjdsfljdslfjldskjflkjdflkldsflsdfklhdsfhsdfhsdkhfkhsdfkldjfkljdfkjdskfkjdskfjkljdfkldsfkkjsdfkljsdfkdsfkjdsfkljsdfkjdsldjsfklkjsdfkldsjfkdsjfkdsfkdfklkDISBMWBMWDISDME142001 model year changesBMWDIS3IHKR control unit with operating controlsThe IHKR control unit is incorporated into the control panel. The control panel consists ofthree buttons and three rotary dials.1. Temperature control potentiometer2. Air distribution mechanical knob3. Fan control potentiometer14564. Recirculation5. Air conditioning request6. Rear window defroster233 cables Blue - vent flapsRed - defrost flapsGreen - footwell flapsX183413 pinX61112 pinX61026 pinFunctional Description:•Air distribution:is carried out using the mechanical rotary dial acting on threebowden cables.Blower adjustment:is carried out using the rotary dial potentiometer (22 steps). Thecontrol unit signals the final stage via a variable voltage signal.Temperature control:The desired interior temperature is set with the rotary dialpotentiometer on the control panel. Temperature regulation is based on the Y-factor.The inputs used to determine the Y-factor are:• Position of the temperature control potentiometer dial• Heater core temperature• Coolant temperature• Exterior Temperature• Interior TemperatureControl of the interior temperature is carried out by the control unit cycling the watervalve to regulate the temperature of the heater core. During heater operation theauxiliary water pump will be switched on to increase coolant circulation through theheater core. The service station feature is carried over to the E39 IHKR.•Fresh air/recirculation:Recirculation is requested by an input to the control panelbutton or the MFL. The control unit actuates the fresh air/re-circ stepper motor forcontrol of the flap position. Ram effect air is compensated for.Air conditioning:The request for air conditioning is made by means of a push button.152001 model year changes•••4The IHKR control module communicates with the DME via the K-Bus/KOMBI/CAN Buslink to request permission for compressor activation. The control of the compressorclutch is directly by the IHKA module via a final stage.•Rear Window Defroster:The rear window defroster is controlled via a request fromthe button on the panel. After switching on for the first time, the rear window is heatedfor 10 minutes. Output voltage to the window is provided by the K13 rear defoggerrelay. After automatic switch off, if the button is pressed once again the control unit willprovide a clocked operation alternating at 40 seconds on and 80 seconds off. If thevehicle voltage drops below 11.4V during this second heating operation the function isstopped, however the LED on the button will not be extinguished. If voltage increasespast 12.2V for at least one second, clocked operation will resume. Clocked operationcontinues until the button is pressed again or the ignition is cycled.•Washer Jet Heating:The IHKR provides operating current to the washer jet heatersbased on outside temperature. The washer jets are heated below an outsidetemperature of 37 F.o•K-Bus Communication:The IHKR control unit is on the vehicle K-bus and receivesand sends information concerning:• Engine temperature, RPM, KL61, KL50, compressor request, auxiliary fan request,compressor load (DME)• Outside temperature KL15 and road speed (KOMBI)• Diagnosis and coding (DIS/MoDiC)Defrost FlapLeft side of IHKR caseBlowerVentilation FlapStratification flapHeater CoreEvaporatorOutlet, Rear compartmentOutlet, rear footwell162001 model year changes5
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