Tribologia

Challenges on Interaction between Lube Oil and PCU on Modern Engines

Rafael Antonio Bruno
Product Technology
MAHLE Jundiai Tech Center

MAHLE France SAS, EED1L, 17-June-2011

© MAHLE

Challenges on Interaction between Lube Oil and PCU on Modern Engines

Table of Content

1. Engine Demands and New Technologies

2. Effects on PCU components

3. Experimental Results – Friction Focus

4. Final Considerations

2

MAHLE France SAS, EED1L, 17-June-2011

© MAHLE

Challenges on Interaction between Lube Oil and PCU on Modern Engines

Table of Content

1. Engine Demands and New Technologies

2. Effects on PCU components

3. Experimental Results – Friction Focus

4. Final Considerations

3

MAHLE France SAS, EED1L, 17-June-2011

© MAHLE

Challenges on Interaction between Lube Oil and PCU on Modern Engines

TREND
TREND

• reduced friction components • improved efficiency
• low weight
• thermal mgt
• downsize and boosting
• low oil viscosity
• direct injection (GDI,
EDI)
•VVT
• High EGR
• Extended oil change

ENGINE
SYSTEM

Low Fuel consumption
(CO2 emission) and general emissions

ENGINE DEMAND

New Engine Demands

4

Hybridization

• start stop controls
• smaller and dedicated engines
(range extender)

• higher mechanical loads
• lower lubricity (quantity or longer use)
• reduced noise

MAHLE France SAS, EED1L, 17-June-2011

Increase Power
Output

• Diesotto/HCCI concepts • Dowsizing
• Turbo charge

Alternative Fuels or Fuel Quality

• Ethanol (E85 in
NAFTA, E100 in
Brazil)
• Hydrogen (fuel cell Vs. ICE)
• Natural gas
• Flex fuel
• High S, Water content on Diesel
• Biodiesel
• Regulation on different regions

• higher structural resistance
• low mass demand
• new geometries to support engine technology Low Cost
Concepts

• NA
• MPFI
• Low power density

• higher load carrying capacity
• higher corrosion resistance
• higher wear resistance
•