宝马3系N45_46发动机培训课件（可编辑）

宝马3系N45_46发动机培训课件（可编辑） 宝马3系N45_46发动机培训课件 Participants Manual The information contained in this participants manual is intended solely for participants of the Aftersales Training Refer to the latest relevant "Technical Service" information for any changes supplements to the Technical Data conceptinfobmwde 2004 BMW Group München Germany Reprints of this manual or its parts require the written approval of BMW Group München VS-12 Aftersales Training Participants Manual E46 - Drive train N45 Engine N46 Engine Contents Models 1 Introduction 3 System components 9 Models N45N46 Engine Engine variants The following variants of the N45 and N46 engine will be installed in the N46 model series Model Model series Engine variant Phase-in date 316i E4625 N45B16AA 0304 316ti E465 N46B18AA 0304 316i E4643 N46B18AA 0304 318i E46234C N46B20AA 0304 The N45 engine will be used only for Greece and Portugal 1 2 Introduction N45N46 Engine New engine generation NG4 The N40 and N42 engines have been re- The performance data of the new engines engineered Under the new designation N45 remain unchanged As the N40 its successor and N46 respectively they carry on the line of the N45 will also only be used for the 4-cylinder engines countries Greece and Portugal Component differences N45 and N46 Component N45 N46 Differentiated intake system DISA No Yes Valvetronic No Yes Mechanical vacuum pump No Yes Electrically controlled suction jet pump Yes No Digital motor electronics DME ME 92 MEV 92 Changes Compared to the N40 and N42 engines the – Vacuum pump N46 only following components of the N45 and N46 – Roller-type cam follower engines have been changed – Counterbalance shafts – Cylinder head cover – Introduction of DME Bosch MEV 92 with – Crankshaft this change was already integrated Valvetronic control unit N46 implemented in the N40N42 only – Connecting rods – Spark plugs 3 Technical data Description N45B16 N46B18 N46B20 Engine type 4-cyl in-line 4-cyl in-line 4-cyl in-line 3 Displacement cm 1796 1796 1995 Borestroke mm 8481 8481 8490 Cylinder spacing mm 91 91 91 Crankshaft main bearing mm 4 x 56 4 x 56 4 x 56 1 x 65 1 x 65 1 x 65 Crankshaft big-end bearing mm 50 50 50 Power output kW 85 85 105 at engine speed rpm 6100 5500 6000 Torque Nm 150 175 200 at engine speed rpm 3900 3750 3750 Cutoff speed rpm 6500 6500 6500 Compression ratio 102 102 100 Valvescylinder 44 44 44 Intake valve mm 35 32 32 Exhaust valve mm 29 29 29 Intake valve lift mm 96 03 - 97 03 - 97 Exhaust valve lift mm 94 97 97 Camshaft opening angle IE ? 236248 250258 250258 Camshaft spread IE ? 60-120 60-120 60-12060- 60-120 60-120 120 Engine weight kg assembly 11 to 13 with 132 138 138 engine oil Fuel system RON 98 98 98 Fuel RON 91-98 91-98 91-98 Knock control Yes Yes Yes Variable-geometry intake system DISA No No Yes Digital engine electronics ME 92 MEV 92 MEV 92 Conforms to EU exhaust emission EURO 3 EURO 4 EURO 4 requirements Engine length mm 490 490 490 4 Full load diagrams 1 - Full load diagram N45 5 2 - Full load diagram N46B18 and N46B20 6 Engine designation The engine designation is engraved on the end face of the engine block 3 - Engine designation Index Description 1 N New generation 2 Engine type 40 42 45 46 4-cyl in-line engine 3 Fuel B Petrol D Diesel 4 Displacement 20 2 litres 5 Compression A 102 B16 B18 and 100 B20 B 105 C 90 6 Performance stage A upper performance stage Y lower performance stage 7 8 System components N45N46 Engine Modified components Counterbalance shafts The counterbalance shafts are made from a precision machined The gearwheels on the casting The teeth of the drive gears are N40N42 are shrink-fitted Crankshaft The crankshaft of the N45N46 is a cast At the start of series production the thrust component The fourth bearing in the upper bearing on the N40N42 was located at the section of the crankcase is a built-in thrust fifth crankshaft bearing The thrust bearing bearing Bearings 1 - 4 have a diameter of 56 was subsequently relocated to the fourth mm while for acoustic reasons reduction of crankshaft bearing as on the present N45 flywheel wobble bearing 5 has a diameter of N46 65 mm Connecting rods The geometry of the connecting rods was of the bearing cap bolts has been reduced changed in line with the common part concept from M10 to M8 The parting faces of the for future engines The connecting rods are bearing caps are cracked The connecting rod made of steel and compared to the features a trapezoidal shape in the area of the connecting rods of the N40N42 their weight small connecting rod eye The pin diameter is is reduced through lower mass The diameter 20 mm the bearing diameter 50 mm Spark plugs To optimize the combustion process the protrudes by a further 2 mm into the spark plug function was changed over from combustion chamber The centre electrode of the surface discharge principle with two the new spark plugs is made from platinum ground electrodes to air discharge with one thus enabling a spark plug change interval of ground electrode As a result the spark 100000 kilometres Vacuum pump The vacuum pump on the N46 is equipped normal running direction The vacuum pump with a pressure relief valve The pressure relief without a pressure relief valve could be valve reduces the pressure in the vacuum damaged when the engine was turned pump when the engine is turned opposite its opposite its normal running direction Roller-type cam follower The roller-type cam followers are made from concept for future engines The N40N42 sheet metal in line with the common part featured cast roller cam followers Cylinder head cover The cylinder head cover has been reinforced temperatures in the area of the secondary air by means of additional ribbing in the area of duct the secondary air duct The cylinder head cover features a temperature resistant material on account of the higher 9 10 Participants Manual E46 - Drive train Digital motor electronics DME N45 ME 92 N46 MEV 92 Contents Models 1 Introduction 3 System overview 5 System components 11 System functions 13 Models DME ME 92MEV 92 Digital motor electronics DME History Model series Engine DME Additional control units E46 N40 ME 92 --- E46 N42 ME 92 Valvetronic control unit E46 N46 MEV 92 --- E60 N62 ME com Valvetronic control unit E63 N62 ME com Valvetronic control unit E65 N62 ME 92 Valvetronic control unit E65 N62 ME com Valvetronic control unit E65E66 N73 2x MED com 1 Valvetronic control unit 1 high pressure fuel injector control unit 1 2 Introduction DME ME 92MEV 92 Digital motor electronics DME The N45 engine will be equipped with the control is integrated in the DME control unit in DME ME 92 already known from the N40 connection with the MEV 92 There will be no engine separate Valvetronic control unit The new DME MEV 92 Bosch will be used for the N46 engine Valvetronic Changes ME 92 for N45 Compared to the DME ME 92 N42 the ME – No second monitor sensor oxygen sensor 92 of the N40N45 engines has been reduced with erratic characteristic by the following functions – No intake manifold pressure sensor – No Valvetronic control unit – Installation of a valve for connecting the – No characteristic map thermostat suction jet pump upstream of brake booster – No second control sensor oxygen sensor with constant characteristic Changes MEV 92 for N46 The following changes have been – Pin assignments implemented compared to the ME 92 N42 – Modified engine wiring harness – Integrated Valvetronic control – Heating power requirement from IHKA – Increased processor power – 2 control unit connectors 3 4 System overview DME ME 92MEV 92 InputOutput ME 92 for N45 1 - ME 92 5 Index Description 1 Digital motor electronics DME 2 Clutch pedal switch 3 Brake pedal switchbrake light test switch 4 Dynamic stability control DSC 5 Coolant temperature sensor 6 Accelerator pedal module FPM 7 Multifunction steering wheel MFL 8 Thermal oil level sensor TNS 9 Alternator 10 Crankshaft position sensor KWG 11 Intake camshaft sensor NWG 12 Exhaust camshaft sensor NWG 13 Engine temperature sensor 14 Hot-film air mass meter HFM 15 Knock sensors for cyls 1-2 and cyls 3-4 16 Oxygen sensor monitor sensor with erratic characteristic 17 Relay for electric fuel pump EKP 18 Radiator fan 19 Relay for AC compressor 20 Fuel tank vent valve TEV 21 Valve for suction jet pump 22 VANOS solenoid valves 23 Relay for ignition coils 24 Ignition coils 25 Fuel injectors 26 Throttle valve 27 Electronic vehicle immobilizer EWS 28 Relay for starter 29 Starter 30 Oxygen sensor control sensor with constant characteristic 31 Diagnosis connector System circuit diagram ME 92 The system circuit diagram is on the fold-out page 6 MEV 92 for N46 2 - MEV 92 7 Index Description 1 Digital motor electronics 2 Clutch pedal switch 3 Brake pedal switchbrake light test switch 4 Dynamic stability control DSC 5 Coolant temperature sensor 6 Accelerator pedal module FPM 7 Multifunction steering wheel MFL 8 Thermal oil level sensor TNS 9 Alternator 10 Crankshaft sensor KWG 11 Intake camshaft sensor NWG 12 Exhaust camshaft sensor NWG 13 Engine temperature sensor 14 Hot-film air mass meter HFM 15 Eccentric shaft sensor 16 Intake pipe pressure sensor 17 Knock sensors for cyls 1-2 and cyls 3-4 18 Oxygen sensors monitor sensors with erratic characteristic 19 Relay for electric fuel pump EKP 20 Radiator fan 21 Relay for AC compressor 22 Relay for secondary air pump EURO 4 variant only 23 Secondary air pump EURO 4 variant only 24 Fuel tank vent valve TEV 25 VANOS solenoid valves 26 Relay for ignition coils 27 Ignition coils 28 Characteristic map thermostat 29 Fuel injectors 30 Throttle valve 31 Variable-geometry intake system DISA 32 Relay for Valvetronic motor 33 Valvetronic motor 34 Electronic vehicle immobilizer EWS 35 Relay for starter 36 Starter 37 Oxygen sensors control sensors with constant characteristic 38 Diagnosis connector System circuit diagram The system circuit diagram is on the fold-out page Key to system circuit diagram follows 8 Index Description 1 Digital motor electronics DME 2 Ignition lock 3 Clutch pedal switch 4 Brake pedal switchbrake light test switch 5 Dynamic stability control DSC 6 Electronic vehicle immobilizer EWS 7 Coolant temperature sensor 8 Engine temperature sensor 9 Multifunction steering wheel MFL 10 Alternator 11 Thermal oil level sensor TNS 12 Accelerator pedal module FPM 13 Temperature sensor in control unit 14 DME main relay 15 Diagnosis connector 16 Relay for electric fuel pump EKP 17 Relay for AC compressor 18 Radiator fan 19 Secondary air pump SLP 20 Relay for secondary air pump SLP 21 Fuel tank vent valve TEV 22 VANOS solenoid valve 23 VANOS solenoid valve 24 Fuel injector 25 Fuel injector 26 Fuel injector 27 Fuel injector 28 Crankshaft sensor KWG 29 Intake camshaft sensor NWG 30 Exhaust camshaft sensor NWG 31 Hot-film air mass meter HFM throttle valve 32 Knock sensor for cyls 1-2 33 Knock sensor for cyls 3-4 relay for starter 34 Intake pipe pressure sensor 35 IHKA control unit heating power requirement 36 Eccentric shaft sensor Valvetronic 37 Relay for Valvetronic motor 38 Valvetronic motor 39 Fan motor 40 PT-CAN 42 Relay for ignition coils 9 Index Description 43 Ignition coil 44 Ignition coil 45 Ignition coil 46 Ignition coil 47 Throttle valve 48 Oxygen sensor control sensor with constant characteristic 49 Oxygen sensor monitor sensor with erratic characteristic 50 Oxygen sensor control sensor with constant characteristic 51 Oxygen sensor monitor sensor with erratic characteristic 52 Ground connection 10 System components DME ME 92MEV 92 Modified components No changes have been made to the components of the ME 92 for the N45 engine MEV 92 control unit In connection with the MEV 92 the Connectors Valvetronic is now controlled by the DME The control unit features two connectors with control unit thus rendering the Valvetronic a total of 7 modules control unit known from the ME 92 unnecessary Processor power To meet the expanded functions the processor power was increased from 44 MHz to 56 MHz clock frequency 1 - MEV 92 control unit 11 Index Description 1 Connector 60004 to 60007 2 Connector 60001 to 60003 M1 Connector module 1 M2 Connector module 2 M3 Connector module 3 M4 Connector module 4 M5 Connector module 5 M6 Connector module 6 M7 Connector module 7 12 System functions DME ME 92MEV 92 Digital motor electronics DME functions Valvetronic In connection with the MEV 92 the from the ME 92 unnecessary The Valvetronic Valvetronic is now controlled by the DME thus functions have not been changed rendering the Valvetronic control unit known Heating power requirement The heating capacity of the engine may not be This switch-over cannot be perceived by the sufficient for vehicle heating purposes under driver and is neutral in terms of exhaust certain operating conditions In this case the emission The reduction in efficiency is heating and air conditioning system IHKA dependent on the engine and coolant control unit requests an increase in the temperature heating power The heating power requirement signal The efficiency of the engine is temporarily ground signal is routed via a line from the reduced in order to increase the engine IHKA control unit to the DME heating capacity The efficiency is reduced by switching over from Valvetronic mode to throttle valve mode 13 Participants Manual E46 N45N46 6 4 N _ 5 4 N _ 6 4 E _ U N T - 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