1. Air Emission Management
BIMCO panel at Nor Shipping / Oslo,
Air Emission Management
Power2 & VCM

2. Advanced Turbocharging Power2 – two-stage turbocharging
Basic potential
Pressure ratios of up to 12
Turbocharging efficiencies above 75%
tintercooling 25°C
DhTC 
tintercooling 60°C
With higher pressure ratio …
… increase in hTC
… increase in DpCyl
… more compact 2-stage
system
Texh const
77%
DpCyl 
75%
Power2 1-stage
68%
hTC = 65%
Pressure ratio [-] 
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 2 | filename

3. Advanced Valve Train Technology VCM – valve control management
Conventional (fixed) valve timing
Reduced valve lift with enhanced Miller
increasing throttling losses
limited Miller timing
reduced lift
Inlet valve lift 
VCM
Steep closing flanks
increased valve lift
advanced Miller timing
Variation from cycle-to-cycle
replacing conventional control elements
VCM Fixed VT
increased lift
Inlet valve lift 
cycle-to-cycle
Crank angle [°CA] 
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 3 | filename

4. Marine Propulsion From conventional to Power2 & VCM
Principles
Accommodate high pressure ratios to benefit from high turbocharging efficiencies
strong Miller timing enabled by VCM
low NOx for Diesel
increased knock margin for gas
high engine power density
Use VCM as the air management control replacing conventional elements (e.g. waste gate, bypass, throttle valves)
Schematic view
Bmep 
IMO II mod. Miller
strong Miller
State-of-the-art 1-stage
Texh const
77%
DpCyl 
75%
Power2 1-stage
68%
hTC = 65%
TC pressure ratio [-] 
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 4 | filename

5. Marine Propulsion Example: Medium Speed Diesel – FPP
Reference:
25 bar 750 rpm
3-pulse, mod. Miller, 1-stage
Power2 & VCM:
Engine power up 15%
Const. pZmax and lv at full load
Change from pulse to MPC
Miller optimization for optimum efficiency (Fuel opt.) and minimum NOx (NOx opt.)
Later IVC towards lower loads with VCM (reduction of Miller effect)
Reference
Power2 & VCM
Fuel opt.
NOx opt.
5 g/kWh
1 g/kWh
D to ref.
Bsfc E3 / 50%
NOx E3 Ref. / IMO II
Fuel opt.
-3.1% / -4.2%
-30% / -38%
NOx opt.
-0.5% / -1.9%
-45% / -51%
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 5 | filename
Remarks: based on simulations, NOx rather indicative

6. Marine Propulsion Example: Medium Speed Gas – n = const
Reference:
22 bar 750 rpm
e = 12, mod. Miller, 1-stage
lv control with WG
Power2 & VCM:
Engine power up const. pZmax / bmep and lv at full load
Strong Miller, repl. WG by VCM
Increase compression ratio to same end of compression temperature
hE +3.2%pts  6.5% / g/kWh lower bsfc at full load
100% load
epsilon +2.5
IVC -35°CA
epsilon +3.5
IVC -50°CA
IVC -20°CA
Reference
Bmep +20%
IVC -45°CA
Power2
VCM
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 6 | filename
Remarks: based on simulations

7. Marine Propulsion Power2 and VCM – summary
Power2 and VCM enable significant …
… lower NOx for Diesel engines of 30 to 60% vs, IMO II concepts
… lower fuel consumption in Gas and Diesel engines of 5%pts
… higher engine power densities w/o increased of thermal loading
Further potentials:
Increased robustness in regard to gas qualities (lower MN w/o de-rating)
Fuel and NOx optimized operating modes incl. switching capabilities (operation in ECA vs. non-ECA)
Enhanced engine operating range (e.g. torque rise)
Improved Diesel mode in Dual Fuel engine
Improved transient capabilities
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 7 | filename

8. Marine Propulsion Scared of 2-stage …?
Service steps …
1-Stage
Power2
Removal of air outlet flange connection
Removal of air inlet
Removal of insulation
Removal of air inlet casing together with the insert wall
Removal of compressor casing
Removal of oil connections
Removal of cartridge group
Removal of cartridge group
© ABB Group / ABB Turbocharging
November 18, 2018 | Slide 8 | filename

9. The Power of Power2 … © ABB Group / ABB Turbocharging
November 18, 2018 | Slide 9 | filename

10. © ABB Group
November 18, 2018 | Slide 10