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N62 Engine

N62 ENGINE

Model: E65 - 745i / E66 - 745Li

Engine: N62B44

Production Date: 11/2001 - E65, 01/2002 - E66

Objectives of The Module

After Completing this module, you will be able to:

• Describe the two stage oil supply.

• Distinguish the difference between the left and right drive chain tensioning assem-

blies.

• Explain the Bi-VANOS operation.

• Understand the function of the Variable intake manifold.

• Explain the cooling circuit flow.

• List what chamber A and chamber B is used for in the Bi-VANOS system.

• Identify the Secondary air components.

• Explain how the initial VANOS position is retained when oil pressure is not present.

• List the proper drive belt removal procedure.

• Describe the throttle valve functions.

• Identify the N62B44 designation.

Содержание N62B44

Страница 1: ...Valve 7 Intake Manifold 8 Crankcase Venting System 12 Exhaust System 13 Exhaust Manifold with Catalytic Converter 13 Silencers 14 Secondary Air System 14 Ancillary Components 16 Belt Drive 16 Alternat...

Страница 2: ...3 Transmission Oil Water Heat Exchanger 44 Electrically Operated Fan 44 Viscous Coupling Fan 44 Engine block 45 Oil Sump 45 Crankcase 45 Crankshaft 46 Connecting Rods and Pistons 46 Flywheel 47 Vibrat...

Страница 3: ...t drive chain tensioning assem blies Explain the Bi VANOS operation Understand the function of the Variable intake manifold Explain the cooling circuit flow List what chamber A and chamber B is used f...

Страница 4: ...ction with the Variable Intake Manifold the Valvetronic system adapts the intake valve lift to ensure optimum cylinder filling The throttle valve use is limited during engine operation to maintain a c...

Страница 5: ...ompression Ratio 10 0 Valves Cylinders 4 Intake Valve Diameter mm 35 Exhaust Valve Diameter mm 29 Intake Valve Lift mm 0 3 9 85 Exhaust Valve Lift mm 9 7 Cams Open Period crankshaft 282 254 Engine Wei...

Страница 6: ...4 N62 Engine 42 02 02...

Страница 7: ...stat Housing 6 Throttle Unit 7 Vacuum Pump N62B44 Engine Rear View 1 Camshaft Position Sensor Cylinder Bank 5 8 2 Valvetronic Eccentric Shaft Position Sensor Cylinder Bank 5 8 3 Valvetronic Eccentric...

Страница 8: ...r speed ranges Long air intake paths ensure optimum volumetric efficiency in the lower to middle speed ranges This optimizes the torque curve and increases the torque In order to optimize the power in...

Страница 9: ...ns however the engine is started with the throttle valve fully opened because this has a positive effect on the starting characteris tics E En ns su ur riin ng g a a c co on ns st ta an nt t v va ac c...

Страница 10: ...inder filling and scavenging This is deter mined by the optimal matching of the intake pipe dimensions the exhaust system and the valve timing The intake manifold is located in the engine V and is mou...

Страница 11: ...at sonic speed in the direction of the intake valve M Mo ov ve em me en nt t o of f t th he e iin nt ta ak ke e a aiir r w wiit th h t th he e iin nt ta ak ke e v va allv ve e o op pe en n 1 Pressure...

Страница 12: ...ft The intake air flows via the manifold volume through the funnel 2 and on to the cylinders The intake path length is set as the rotor turns The intake path length can be adjusted according to the en...

Страница 13: ...he cylinders is now short The funnel can be progressively adjusted to any point between the long short intake path posi tions I In nt ta ak ke e m ma an niif fo olld d s se et t t to o s sh ho or rt t...

Страница 14: ...ylinder head covers through labyrinth separators one per cylinder head The oil which accumulates on the walls of the labyrinth separators flows into the cylinder head via a siphon and from there back...

Страница 15: ...together form one component A ceramic bed pre catalytic converter and a ceramic bed main catalytic converter are arranged one behind the other in the catalytic converter housing The mounting for the b...

Страница 16: ...as flap The exhaust gas flap is closed with vacuum and is sprung open by the actuator when vacuum is not present The procedure is carried out using a solenoid valve which is electrically controlled by...

Страница 17: ...operating conditions Coolant temperature from 10 C to approximately 60 C Air temperature NTC sensor in HFM Engine speed One non return valve is mounted on each cylinder head see also Engine Views The...

Страница 18: ...ith tensioning pulley and torsioner T To o r re em mo ov ve e t th he e d dr riiv ve e b be ellt t The tensioning pulley is pushed back using a Torx tool in the recess provided 1 and fixed in this pos...

Страница 19: ...or modifications The BSD interface bit serial data inter face for the ECM is new Further details found in the cooling circuit section Regulation The alternator communicates with the Engine Control Mod...

Страница 20: ...or display strategy has not changed in comparison with the alternators currently in use Regulating the alternator output is particularly important when activating Valvetronic operating motors A temper...

Страница 21: ...itioning is not requested no refrigerant is sup plied to the refrigerant circuit There is an internal compressor refrigerant cir cuit to maintain lubrication The IHKA electron ics regulate the compres...

Страница 22: ...The cylinder heads are made from aluminum and are manufactured using gravity die casting The upper timing chain housing is now an integral part of the cylinder head 20 N62 Engine Cylinder Head 1 Cylin...

Страница 23: ...made from plastic The retaining sleeves for the ignition coils have molded on gaskets The sleeves must be replaced if any hardening or damage is vis ible on the gaskets The sleeves are inserted into t...

Страница 24: ...s s s sh ho ou ulld d a allw wa ay ys s b be e r re ep plla ac ce ed d w wh he en n r re ep pa aiir rs s a ar re e p pe er rf fo or rm me ed d The lower part of the timing chain housing is bolted to t...

Страница 25: ...throttle valve is only opened slightly in these ranges The consequences are less than optimal cylinder filling torque and increased fuel consumption Technical measures were previously introduced such...

Страница 26: ...opening the intake valves later after top dead center ATDC using VANOS This increases vacuum in the combustion chamber which accelerates filling and turbulence when the intake valves are opened I In n...

Страница 27: ...with eccentric shaft intermediate levers with retaining springs drag lever and the intake camshaft In addition the following components belong to the Valvetronic system A Valvetronic motor for each cy...

Страница 28: ...th he e w wo or rm m s sh ha af ft t c ca an n b be e m mo ov ve ed d u us siin ng g a an n A Alllle en n k ke ey y t to o r re elle ea as se e t th he e m mo ot to or r A A h ho olle e m mu us st t...

Страница 29: ...the camshaft by the the progressive lobe on the eccentric shaft as it is rotated This offers a variable ratio effect for valve actuation The roller finger is used to actuate the intake valve The inte...

Страница 30: ...l of the inter mediate lever will depress the roller finger A spring is located on each intermediate lever to maintain con stant contact with the camshaft The roller finger is cushioned by the HVA and...

Страница 31: ...between the VANOS unit and the vacuum pump drive to reduce wear 3 The V VA AN NO OS S u un niit ts s a ar re e lla ab be elle ed d I In n O Ou ut t for intake and exhaust installa tion positions The V...

Страница 32: ...es are mounted through the upper timing case front cover There are two solenoids per cylinder head to control the oil flow to the camshaft ports for the intake and exhaust VANOS units The 4 3 way prop...

Страница 33: ...ressure sprung When the solenoid valve is activated to supply oil pressure to the VANOS unit the locking pin is compressed and releases the VANOS for adjustment The internal blades 9 are spring loaded...

Страница 34: ...t relationship timing The example below shows the a ad djju us st tm me en nt t procedure together with the pressure progres sion based on the VANOS unit for the exhaust camshafts During this adjustme...

Страница 35: ...ith the pressure progression based on the VANOS unit for the exhaust camshafts During this adjustment chamber A is open through the solenoid to allow the oil to drain back through the cylinder head in...

Страница 36: ...l the opening duration and cross section of the valve opening can also be easily selected within a defined range Vacuum pump The N62 engine requires a vacuum pump for the vacuum assisted brake booster...

Страница 37: ...l for the camshaft position sensor cylinder bank 5 8 5 Upper timing chain guide with integrated oil jet 6 Guide rail 7 Sprocket for Oil Pump Drive 8 Timing case lower section 9 Tensioning rail cylinde...

Страница 38: ...The sprocket will also be fitted to a 12 cylinder engine variant which will be available in the future Please observe the installation instructions and the rel evant labels V8 Front V12 Front when in...

Страница 39: ...een fitted to lubricate the cylinder bank 5 8 drive chain There is a valve in the oil jet which opens at a pressure of 1 bar and supplies the drive chain with engine oil N No ot te e Refer to the Repa...

Страница 40: ...mperature Sensor 4 Cylinder Head Gasket 15 Water Pump 5 Coolant Supply Line 16 Radiator Return Flow 6 Cylinder Head Ventilation Lines 17 Radiator Ventilation Line 7 Hole crankcase venting system 18 Ex...

Страница 41: ...n ports require that time should be allowed after the cooling system has been filled for the air to escape Coolant flow in the Engine Block The coolant flows from the water pump through the feed pipe...

Страница 42: ...ower section C Ca au ut tiio on n d du ur riin ng g iin ns st ta alllla at tiio on n o of f t th he e w wa at te er r p pu um mp p The impeller is made from reinforced plastic 42 02 59 Water Pump Ther...

Страница 43: ...is necessary for water pump operation resulted in evapora tion residues being left on the external walls of the water pump The leakage restraint system has the advantage in that the coolant escaping f...

Страница 44: ...cooling system components Cooling radiator Air conditioning condenser Transmission oil water heat exchanger Hydraulic fluid radiator Engine oil radiator Main electric fan Fan shroud for viscous coupli...

Страница 45: ...from the low tempera ture section when the WT thermostat is open into the oil coolant heat exchanger Coolant Expansion Tank The expansion tank is mounted on the right hand wheel housing engine compar...

Страница 46: ...C the thermostat switches the trans mission oil coolant heat exchanger to the low temperature coolant radiator circuit refer to the cooling circuit diagram to cool the transmission oil Electrically O...

Страница 47: ...e The crankcase has a one piece open deck design and is made entirely from AluSil The cylinder walls are hardened using a specific procedure exposure honing Exposure hon ing involves treating the cyli...

Страница 48: ...ification system yellow green white Piston and Connecting Rod The reduced weight cast piston contains integrated valve reliefs in the piston crown The pistons are made from high temperature aluminum a...

Страница 49: ...he outer edge of the damper has a notch 1 to accept the locating tool when positioning the crankshaft for initial setting The locating tool inserts into the raised mount in the front cover 2 R Re ef f...

Страница 50: ...the VANOS units T Th he e c ch he ec ck k v va allv ve es s a ar re e a ac cc ce es ss siib blle e f fr ro om m t th he e o ou ut t s siid de e t th he er re ef fo or re e c cy ylliin nd de er r h he...

Страница 51: ...l pump is a two stage gear oil pump with two paral lel switched gear clusters The two pair of gear clusters are stacked one behind the other and work in two stages Stage two both pump supply circuits...

Страница 52: ...h p pu um mp p s su up pp plly y c ciir rc cu uiit ts s a ac ct tiiv va at te ed d w wiit th h o oiill p pr re es ss su ur re e lle es ss s t th ha an n 2 2 b ba ar r M Ma aiin n p pr re es ss su ur...

Страница 53: ...il pump has two functions 1 Deactivates stage two oil pump circuit above 2 bar Stage two is only active in the lower speed range This is to ensure that there is always sufficient oil pressure for the...

Страница 54: ...open This ensures a minimum amount of oil is supplied when the cooler is faulty A modified generator support without connections for the oil thermostat is fitted to vehicles which do not have an oil c...

Страница 55: ...at is the difference between the left and right drive chain tensioning assemblies 6 How is the funnel adjustment made on the 5 8 Variable intake manifold if only one actuating motor is used 7 What is...

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