BMW Group Detlef Hiemesch DEER 2008 Page 1
BMW Diesel. 14th DEER Conference, 4th-7th of August 2008 Detroit
BMW Diesel - Engine Concepts for Efficient Dynamics
Detlef Hiemesch BMW Group
BMW Group Detlef Hiemesch DEER 2008 Page 2

BMW Diesel. Contents.

Evolution of Diesel Performance Diesel Motivation Efficient Dynamics US Market Introduction Future Trends Summary
BMW Group Detlef Hiemesch DEER 2008 Page 3
BMW Diesel. Evolution of Diesel Performance.

BMW 535d BMW 524td

- 3rd generation Common Rail (2000 bar) - Piezo injectors
- 2nd Gen. Common Rail - First V8 Diesel (1600 bar) Sedan in - Introduction of Premium - First BMW DI Technology - First Digital Diesel with at BMW Diesels Segment - 1st BMW 6Cyl. Diesel Oxy-Cat. - BMW 320d wins offered by BMW Inline Diesel Electronics - 524td fastest 24 Hours of (DDE) diesel vehicle Nrburgring in its segment
- Variable Twin Turbo - Diesel Particulate Filter of 2nd Gen.
Torque: + 170 % Power: + 147 %
Consumption: - 20 % Emissions: - 99 %
BMW Group Detlef Hiemesch DEER 2008 Page 4

BMW Market Share Europe

Engines 1000/a 0 Year of Production 1st Generation 262.000 2nd Generation 635.000 3rd Generation until End 2006 2.821.000 Mini

5 Series

7 Series

67% total

BMW Group Detlef Hiemesch DEER 2008 Page 5
BMW Diesel. Diesel Motivation.

Souvereign Performance

Pleasant Acoustics

Low Fuel Consumption

High Range
BMW Group Detlef Hiemesch DEER 2008 Page 6
Diesel vs. comparable Gasoline Vehicle: Acceleration at 4th Gear

Max. Load Diesel Engine

Engine Power
Max. Load Gasoline Engine
Available Power for acceleration Gasoline Vehicle Available Power for Acceleration Diesel Vehicle

Power for const. Speed

85 Vehicle Speed [mph]
BMW Group Detlef Hiemesch DEER 2008 Page 7
5series Sedan 3.0l Diesel Comparable Gasoline Vehicle
(Automatic Transmissions)

35% 32%

Fuel Consumption

26% 20%

Min. Fuel Cons.

MVEG Standard

Overall Test

Max. Fuel Cons.

Source: Test Reports

Vehicle Dynamic

BMW Group Detlef Hiemesch DEER 2008 Page 8
BMW Dieselengines. Diesel Motivation.
Average noise inside vehicle at 30 mph - BMW 5series

Diesel -7,5 dB

Noise [dB]

Diesel

Petrol -5 dB

Petrol

2002 Year of Production
BMW Group Detlef Hiemesch DEER 2008 Page 9
BMW Diesel. Efficient Dynamics.

Increased Power

Reduced Weight
Low Fuel Consumption and Emissions
BMW Group Detlef Hiemesch DEER 2008 Page 10
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BMW Diesel. Variable Twin Turbo.
BMW Group Detlef Hiemesch DEER 2008 Page 12

Small Turbo

Compressor Bypass
Turbine Bypass Large Turbo Waste Gate
BMW Group Detlef Hiemesch DEER 2008 Page 13
26 VNT + Mech. Compressor Effecitve Mean Pressure [bar] 22 Variable Twin Turbo
18 VNT 14 EAT / E-Boost 10
4000 Engine Speed [rpm] 5000
BMW Group Detlef Hiemesch DEER 2008 Page 14

Large T/C pre-charging

Small T/C post-charging
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Large T/C main charger

Small T/C standby
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400 Torque [ft lbf] 1000

Variable Twin Turbo 3.0l 280 hp at 4200 rpm 430 ft lbf at 1750 rpm Single Turbo Engine 3.0l 230 hp at 4000 rpm 380 ft lbf at 2000 rpm

240 Power [hp] Engine Speed [rpm] 4000 5000
BMW Group Detlef Hiemesch DEER 2008 Page 19

BMW Diesel. Combustion.

4 Valves per Cylinder Central Position of Injector Symetrical Combustion Chamber Variable Air Control
Cylinder Displacement: Bore / Stroke:

499 cm 84 / 90 mm

Max. Combustion Pressure: 180 bar
BMW Group Detlef Hiemesch DEER 2008 Page 20
BMW Diesel. Piezo Common-Rail System.
Very quick Needle Opening and Closing for Effective Combustion Up to 5 Shots per Combustion Stroke Very low Tolerances for Injection Quantities Long term Learn Algorithm for Injection Control High Pressure Pump with Feed Volume Control
BMW Group Detlef Hiemesch DEER 2008 Page 21
BMW Group Detlef Hiemesch DEER 2008 Page 22
BMW Diesel. Aluminium Crankcase.
kg kg Weight [ kg ] 40 30

3.0l 6-Cylinder

Cast Iron Cast Iron optimized 37 kg

Aluminium

250 Engine Power [ hp ] 275 300
BMW Group Detlef Hiemesch DEER 2008 Page 23
Cooling Duct between Cylinder Walls
Vertical armed Deep Skirt Formed Threads Deep Screw Linking
Thermal fitted Cast Iron (GG) Liners
Diagonal Crankcase Stiffening
Embossed and shape-forced Bearing Caps (Sintermaterial)
BMW Group Detlef Hiemesch DEER 2008 Page 24
BMW Diesel. Specific Engine Weight.
350 Specific Weight [kg/kW] Competitors 300 Engine Weight [kg] 1,6 1,6-Cylinder 1,2 1,0 200
VNT MJ07 1,08 kg/kW VTT MJ07 0,93 kg/kW

10-Cylinder 8-Cylinder

150 Power [kW] 200 250
BMW Group Detlef Hiemesch DEER 2008 Page 25
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BMW Diesel. Engine Efficiency.
Operating Range Diesel Engine Operating Range Gasoline Engine

= 2.0 = 1.2 = 1.0 = 0.9

0.6 Efficiency [-]

0.5 = 0.8 0.4

Compression Ratio [-]
BMW Group Detlef Hiemesch DEER 2008 Page 27
BMW Diesel. CO2 Emissions.

Gasoline CO2 Diesel

Vehicle Curb Weight

Source: VDA

BMW Group Detlef Hiemesch DEER 2008 Page 28
BMW Diesel. Fuel Consumption.
24 Fuel Consumption NEDC [mpg] Available 8-Cyl. Concept Cyl. VTT (535d) 36 5,0 5,5 6,0 6,5 7,0 7,5 Acceleration 0-60 mph [sec]

Downsizing +40%

BMW Group Detlef Hiemesch DEER 2008 Page 29
BMW Diesel. Exceeding even todays Hybrid Concepts.
Fuel Consumption [l/100 km] 5.5 6.5

BMW X3 3.0sd

Hybrid #2
BMW EU test cycle Customer driving profile*

Competitor Hybrid

Hybrid #1 BMW X3 3.0d BMW 120d MINI Cooper D BMW 118d
Acceleration 0-60 mph [sec]
* Source: An increasing number of press test reports
BMW Group Detlef Hiemesch DEER 2008 Page 30

BMW Diesel. Emissions.

g/mi Tier 1 LDT3 Tier 2 Bin 10 (till MY 08)

0.98 0.60

DPF Tier 2 Bin 5 (MY 09)
DPF. Diesel Particulate Filter DOC. Diesel Oxidation Catalyst SCR. Selective Catalytic Reduction
BMW Group Detlef Hiemesch DEER 2008 Page 31
BMW Diesel. Exhaust System Bin 5.
Particulate Filter Exhaust Gas Temp. Sensor SCR Catalyst NOx-Sensor NOx-Sensor AdBlue Injection Oxi Catalyst

Rear Silencer Mixer

BMW Group Detlef Hiemesch DEER 2008 Page 32
BMW Diesel. Particulate Filter.
Particulates are being filtered and frequently burned Permanent Reduction of Particulates Additional positive Effect on HC-/CO-Emissions No Loss in Engine Power No Increase in Fuel Consumption No Maintenance necessary
BMW Group Detlef Hiemesch DEER 2008 Page 33

BMW Diesel. SCR System.

High Efficiency Good Long Term Stability No Increase in Fuel Consumption Maintenance (Urea Refill) together with Oil Service
Dosing Module NOx-Sensor Urea Tank
Oxidation Catalyst Particulate Filter

SCR-Catalyst

Source: Bosch
BMW Group Detlef Hiemesch DEER 2008 Page 34

BMW Diesel. EGR System.

Further NOx Reduction 30% Reduced Charge Air Temperature Higher Boost Pressure and better Turbocharger Efficiency Improved Fuel Economy
Low pressure EGR High pressure EGR
EGRExhaust Gas Recirculation System
BMW Group Detlef Hiemesch DEER 2008 Page 35
BMW Diesel. US Market Introduction.

X5 xDrive 35d

265 hp, 425 ft lbf Emission Standard LEVII / Bin5 0-60 mph = 6,9 s Fuel Efficiency

(Test Figures)

City 25 mpg Hwy 36 mpg USC 29 mpg
265 hp, 425 ft lbf Emission Standard LEVII / Bin5 0-60 mph = 6,0 s Fuel Efficiency
City 30 mpg Hwy 48 mpg USC 36 mpg
BMW Group Detlef Hiemesch DEER 2008 Page 36
6 Cyl. Inline 3.0l Diesel Engine
2-Stage-Turbo-System (Variable Twin Turbo) Piezo Common Rail System Aluminium Crankcase
SCR System Close Coupled Catalyst and Particulate Filter
BMW Group Detlef Hiemesch DEER 2008 Page 37
BMW Diesel. Future Trends.
Increased specific Power and Torque (>100 hp/dm3)
2-stage Turbocharging: NG Variable Twin Turbo Technology Common-Rail Injection System: Pressure >2000 bar Improved Combustion

Further improved Fuel Consumption (>15%)
Reduced Engine Friction Optimized Combustion Downsizing Advanced Energy Management: Hybrid Functions Optimized Powertrain: Transmission
Reduced Engine Weight (>5 %)
Downsizing Compact Design with high Intergration Level Light Weight Materials
BMW Group Detlef Hiemesch DEER 2008 Page 38

BMW Diesel. Summary.

Evolution of Diesel Performance is impressive Good Reasons for a high Diesel Motivation exist Efficient Dynamics-Philosophy is fundamental for all our Engine Concepts BMWs US Market Introduction starts with X5 xDrive 35d and 335d, both featuring a 6 Cyl. 3.0l Variable Twin Turbo Engine Modern Diesel Technology can contribute a lot to guarantee Future Mobility Medium- and long-term Potentials to further increase Power and in parallel reduce Emissions und Fuel Consumption exist
BMW Group Detlef Hiemesch DEER 2008 Page 39
BMW Diesel. Thank you for your Attention.