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B58TU�Engine

3.�Vacuum�Supply

12

3.1.�Vacuum�pump

Oil�vacuum�pump,�B58/B58TU�engine

Index

Explanation

A

B58�engine,�tandem�oil�pump�with�integrated�vacuum�pump

B

B58TU�engine,�oil�pump

1

Vacuum�pump

2

Oil�pump

Vehicles�with�a�gasoline�engine�and�"traditional�brake�system"�need�a�vacuum�pump�to�boost�the

pedal�force.�In�vehicles�with�a�gasoline�engine�and�DSCi�brake�system�no�vacuum�boost�is�required�as

in�the�DSCi�brake�system�the�pedal�force�is�boosted�hydraulically.�The�graphics�show�the�oil�pumps�of

the�B58�engine�and�the�B58TU�engine�with�combined�vacuum�pump�and�without�vacuum�pump.

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Summary of Contents for B58TU

Page 1: ... s n o t t ob e r e s o l d b a r t e r e d c o p i e do r t r a n s f e r r e d w i t h o u t t h e e x p r e s s w r i t t e nc o n s e n t o f B MW o f N o r t hA me r i c a L L C B MW N A C o p y r i g h t 2 0 1 8B MW o f N o r t hA me r i c a L L C B 5 8 T UE N G I N E R e f e r e n c eMa n u a l ...

Page 2: ...Technical training Product information BMW Service B58TU Engine ...

Page 3: ...hnical Training Centers or BMW Group Contract Training Facilities This training manual or any attached publication is not intended to be a complete and all inclusive source for repair and maintenance data It is only part of a training information system designed to assure that uniform procedures and information are presented to all participants For changes additions to the technical data repair pr...

Page 4: ... Split cooling valve 16 4 1 2 Switching logic of split cooling valve 17 4 2 Heat management module 18 4 3 Operating strategy of the heat management module 20 4 3 1 Cold start phase 21 4 3 2 Warm up phase 22 4 3 3 Operating temperature 23 4 3 4 Maximum cooling requirement 24 4 4 Coolant pump 25 5 Intake Air and Exhaust System 26 5 1 Crankcase monitoring 26 5 1 1 On board diagnosis 26 5 2 Exhaust tu...

Page 5: ...B58TU Engine Contents 7 1 Digital Motor Electronics DME 33 7 2 Component temperature sensor 34 ...

Page 6: ...nformation B58 Engine serves as the basis for this document This document exclusively describes the changes to the B58 engine and serves to support Technical Service Due to the huge similarities the two engines are described in the one document ...

Page 7: ...2 1 1 Innovations To meet the legal requirements for emissions a number of technical improvements have been implemented The technical updates for the B58TU engine include the following new features New features on the B58TU engine ...

Page 8: ...fuel preparation area and function changes in the engine cooling area have made it possible to reduce the CO2 emissions by 2 5 while increasing engine performance by 10 kW 50 Nm 13 hp 36 lb ft 1 2 Technical data The following engine versions are described in this product information B58B30M1 Output in kW hp at rpm 250 335 5500 6500 Torque in Nm lb ft at rpm 450 330 1500 5200 Displacement in cm 299...

Page 9: ...ormance curves between B58B30M1 and B58B30M0 engine 1 2 2 Model overview The following table provides an overview of the models in which the new B58TU engine is used from 07 2018 Model Engine BMW X5 xDrive40i G05 from 07 2018 B58B30M1 BMW X7 xDrive40i G07 from 12 2018 B58B30M1 ...

Page 10: ... cylinder head Depending on the engine output the engine weight the operating strategy of the engine and the cooling surfaces the exhaust manifold is integrated in the cylinder head housing and the exhaust turbocharger is interlocked at the cylinder head Owing to the higher mechanical and thermal loads gasoline engines in the upper power levels and higher have a traditional cylinder head without t...

Page 11: ...pper power level Cylinder head Cylinder head integrated exhaust manifold ZIAK Non cylinder head integrated exhaust manifold nZIAK 2 1 2 Crankcase Honing process Honing process old new Index Explanation A Previous manufacturing process of internal cylindrical honing B New manufacturing process of form honing ...

Page 12: ...ating condition This has a positive effect on the emissions quality oil and fuel consumption as well as output and wear 2 2 Crankshaft drive 2 2 1 Chain drive Features Chain drive at the side of the engine emitting the forces Single part chain drive for driving the camshafts Single sleeve type chain 8 mm Electric motor of the combined oil vacuum pump via a separate chain Plastic tensioning and gui...

Page 13: ...engine and B58TU engine Index Explanation A Two part chain drive B Single part chain drive 1 Slide rail 2 Top timing chain 3 Chain tensioner 4 Tensioning rail 5 Bottom timing chain 6 Camshaft sprocket oil vacuum pump 7 Drive chain oil vacuum pump 8 Guide rail 9 Timing chain ...

Page 14: ...anged Chain track Comparison between chain track of B58 engine and B58TU engine Index Explanation A Chain track two part timing chain drive B58 engine B Chain track single part timing chain drive B58TU engine 1 6 cylinder engine 2 Upper timing chain 3 Timing chain 4 Lower timing chain 5 Drive chain oil vacuum pump The way the combined oil vacuum pump is driven via a separate drive chain from the c...

Page 15: ...ail 2 Sealing sleeve 3 Chain tensioner with screw thread Due to the cylinder head manufacturing process the chain tensioner now has a sealing sleeve with a height of 12 5 mm instead of a sealing ring The spring force of the chain tensioner lies between 40 Nm extended and 90 Nm retracted 2 3 Valve gear 2 3 1 VANOS ...

Page 16: ...ollowing the changeover from a two part chain drive to a single part chain drive the camshaft sprockets on the VANOS now need 46 teeth instead of the previous 36 teeth To compensate for the additional weight of the larger camshaft sprockets the adjuster was designed to be shorter and more compact ...

Page 17: ...mp 2 Oil pump Vehicles with a gasoline engine and traditional brake system need a vacuum pump to boost the pedal force In vehicles with a gasoline engine and DSCi brake system no vacuum boost is required as in the DSCi brake system the pedal force is boosted hydraulically The graphics show the oil pumps of the B58 engine and the B58TU engine with combined vacuum pump and without vacuum pump ...

Page 18: ...lit cooling valve eSCV to enable on demand decoupling of the crankcase from the coolant flow both in the warm up phase and in partial load operation In this situation the coolant is exclusively routed through the cylinder head The engine reaches its operating temperature more quickly in the warm up phase and can be operated with reduced emissions in partial load operation Cooling circuit B58TU eng...

Page 19: ... 14 Index Explanation A High cooling requirement split cooling cylinder head B Low cooling requirement split cooling crankcase 1 Cylinder head 2 Crankcase 3 Heat management module 4 Electric Split Cooling Valve eSCV 5 Coolant pump ...

Page 20: ...B58TU Engine 4 Cooling System 15 Cooling system for B58TU engine ...

Page 21: ...12 Component temperature sensor 13 Expansion tank 14 Engine oil coolant heat exchanger 15 Transmission oil coolant heat exchanger 16 Heat management module In split cooling the cooling requirements for the crankcase and the cylinder head are managed by the electric split cooling valve The fact that the engine reaches operating temperature more quickly again translates to substantial consumption an...

Page 22: ...ent module in the warm up phase such that substantially more coolant is available to the cylinder head than to the crankcase Depending on the engine s operating condition the Digital Motor Electronics DME decide on the distribution of the coolant quantity to the cylinder head and the crankcase as required Direct current motor DC B58TU engine Voltage range in volts V 6 16 Power consumption in amper...

Page 23: ...oolant now also flows through the crankcase and cools components A bleeding procedure in line with the repair instructions is required following a part exchange in the cooling system or refilling of the cooling system Filling without a vacuum filler device watering can filling is not approved There is a risk of engine damage in case of failure to comply The filling specification must be observed O...

Page 24: ...ns ideally adapts the flow rates of the coolant ducts connected to the heat management module to the engine operating points To correctly position the rotary valve the Digital Motor Electronics DME require information including the coolant temperature from the coolant temperature sensor and the material temperature of the cylinder head from the component temperature sensor Warm up and cooling of t...

Page 25: ...rt B Warm up phase C Operating temperature D Transition from normal operation to maximum cooling requirement E Maximum cooling requirement x Rotational angle in angular degrees 1 Heater circuit 2 Main coolant circuit 3 Minor coolant circuit The openings on the rotary valve vary the cross sections of the different coolant ducts as a function of the rotational angle of the rotary valve The following...

Page 26: ...sively via a bypass in the coolant pump The rotary valve in the heat management module closes the coolant lines so that the excess pressure that builds up opens the pressure relief valve in the coolant pump opening pressure 2 1 bar and the coolant is recirculated in the coolant pump Because the coolant circuits through the exhaust turbocharger and the ventilation line of the cylinder head cannot b...

Page 27: ...ase Warm up phase Bx8TU engine In the warm up phase the heat management module additionally opens the connection to the heating in addition to opening the bypass line The coolant flows through the cylinder head the exhaust turbocharger and the engine oil coolant heat exchanger The electric split cooling valve is closed no coolant flows through the engine block split cooling ...

Page 28: ...y valve means that the cross sections of the respective coolant lines are open to a greater or lesser extent depending on the coolant temperature The coolant flows with a varying volumetric flow through the small coolant circuit the large coolant circuit and the heater circuit Depending on the load request the crankcase s coolant connection is opened by the electric split cooling valve thus coolin...

Page 29: ...imum cooling requirement Bx8TU engine To provide maximum cooling at high dynamic loads and or high ambient temperatures the radiator connection is fully opened 100 and the small coolant circuit is completely closed Additionally the heater circuit is 90 closed to achieve the maximum cooling thanks to the maximum coolant volumetric flow through the large coolant circuit ...

Page 30: ...e heat management module the pressure relief valve on the one hand ensures that the engine operating temperature is reached more quickly while at the same time reducing leaks and component damage due to high pressure in the cooling system If an excess pressure of more than 2 1 bar builds up in the coolant circuits the pressure relief valve opens and releases a bypass channel The coolant is now exc...

Page 31: ...ection 6 Connection to clean air line 7 Aluminum heating pipe 8 Electrical connection of heating element Owing to the stricter legislation in the USA the engines for the US market have an OBD concept pressure sensor With a differential pressure sensor in the tank ventilation system and the hot film air mass meter leaks in the crankcase ventilation tank ventilation as well as the blow by lines can ...

Page 32: ... exhaust manifold and exhaust turbocharger housing are no longer designed as a single component for the B58TU engine This means that the exhaust turbocharger can be individually replaced The charging pressure is still controlled by an electrical wastegate valve The exhaust manifold and exhaust turbocharger housing on the B58TU engine can be implemented either as one part or separately Depending on...

Page 33: ...p and the injectors have been revised and designed for a fuel injection pressure of 350 bar Fuel preparation B58TU engine Index Explanation 1 Injector 2 Holding clamp 3 Rail pressure sensor 4 Rail 5 High pressure line 6 High pressure pump 7 Quantity control valve 8 Fuel feed line Strict cleanliness must be observed when carrying out any work on the fuel system ...

Page 34: ...between the holding clamp and direct rail This is not designed to collect escaping fuel This is only used to support a helium leakage test during pre assembly at the factory in order to check the tightness After the initial assembly this plastic sleeve is of no relevance to the engine operation When the solenoid valve injectors are reinstalled or replaced the plastic sleeves are no longer required...

Page 35: ...hen removing and installing the solenoid valve injectors the procedure in the current repair instructions must be followed If the solenoid valve injectors are damaged fuel may be discharged 6 1 2 Solenoid valve injector Measures at the solenoid valve injector The following graphic illustrates the differences between the EURO 6b and EURO 6c versions ...

Page 36: ... valve injector Index Explanation A Solenoid valve injector HDEV5 Bx8 engine EURO 6b B Solenoid valve injector HDEV5 EVO Bx8 engine EURO 6c C Solenoid valve injector HDEV6 Bx8TU engine EURO 6c 1 Injector seat 2 Injection pattern and volumetric distribution ...

Page 37: ...om 200 bar to 350 bar the solenoid valve injectors HEDV6 were optimized using suitable materials and coatings The injection pattern and volumetric distribution have not changed compared with the HDEV5 EVO The repair instructions that are currently valid must be carefully followed when removing and installing the injectors in Service An excessive rotational angle at the injector shank and excessive...

Page 38: ...is characterized by a uniform housing and a uniform connector strip The hardware inside has been adapted to the respective applications The Bx8TU engines have the DME 8 engine electronics generation Depending on the engine version the Digital Motor Electronics DME will be given a specific designation DME 8 xTyz x number of cylinders Ty vehicle electrical system architecture z H hybrid can be decod...

Page 39: ...s have been made to the function of the component itself It records the material temperature of the crankcase close to the cylinder head in the area of the 6th cylinder and forwards this to the DME engine control unit As a result power consumption and pollutant emissions can be influenced even more efficiently A variable temperature resistance negative temperature coefficient which covers a temper...

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