Friction Reduction in Power Cylinder Systems for Downsize Gasoline Engines with Modern Surface Technologies of Aluminum Crankcases

2012 ◽  
Author(s):  
Wolfgang Hanke ◽  
Matthias Fahr ◽  
Andreas Rehl ◽  
Marco Voigt ◽  
Hajime Ando
Keyword(s):  
Friction Reduction ◽  
Gasoline Engines ◽  
Power Cylinder

Friction Reduction in Power Cylinder Systems of Gasoline Engines

MTZ worldwide ◽  
2011 ◽  
Vol 72 (7-8) ◽  
pp. 24-29 ◽  
Author(s):  
Matthias Fahr ◽  
Wolfgang Hanke ◽  
Christian Klimesch ◽  
Andreas Rehl
Keyword(s):  
Friction Reduction ◽  
Gasoline Engines ◽  
Power Cylinder

Friction Reduction in Power Cylinder Systems for Pass enger Car Diesel Engines

MTZ worldwide ◽  
2014 ◽  
Vol 75 (2) ◽  
pp. 26-31 ◽  
Author(s):  
Wolfgang Hanke ◽  
Hajime Ando ◽  
Matthias Fahr ◽  
Marco Voigt
Keyword(s):  
Diesel Engines ◽  
Friction Reduction ◽  
Power Cylinder

Friction Reduction in Power Cylinder Systems of Commercial Vehicle Engines

MTZ worldwide ◽  
2019 ◽  
Vol 80 (2) ◽  
pp. 18-23 ◽  
Author(s):  
Wolfgang Hanke ◽  
Naoki Iijima ◽  
Jochen Müller ◽  
Marco Voigt
Keyword(s):  
Commercial Vehicle ◽  
Friction Reduction ◽  
Power Cylinder

Power Cylinder System Friction and Weight Optimization in High Performance Gasoline Engines

2009 ◽  
Author(s):  
Wolfgang Hanke ◽  
Ralf Buschbeck ◽  
Steve Letourneau ◽  
Doug Sinclair ◽  
Athanassios Skiadas ◽  
...  
Keyword(s):  
High Performance ◽  
Weight Optimization ◽  
Gasoline Engines ◽  
Power Cylinder

Low Friction Ring Pack for Gasoline Engines

2006 ◽  
Author(s):  
Eduardo Tomanik ◽  
Andre Ferrarese
Keyword(s):  
Ring Width ◽  
Friction Reduction ◽  
Main Concern ◽  
Oil Consumption ◽  
Low Friction ◽  
Tangential Load ◽  
Gasoline Engines ◽  
Operational Conditions ◽  
Fuel Savings ◽  
Ring Pack

Lower emissions, reduced friction and low lubricant oil consumption are the main drivers for new gasoline engines. In terms of piston ring pack, the trend is to reduce ring tangential load and width. On the other hand, the main concern is to have proper ring conformability and lube oil control. This work presents the comparison of a baseline ring pack with a low friction pack in terms of friction, blow-by control and lube oil consumption. Besides ring width and tangential load reductions, evaluations of ring materials are also carried out. Narrow compression rings, 1.0 and 0.8 mm, were engine tested. PVD top ring was also tested and showed about 10% friction reduction compared to the usual Gas Nitrided one. 3-piece 1.5 mm oil rings were compared with the usual 2.0 mm ones. Being more flexible, the narrower oil rings can have same conformability with reduced tangential load. Friction was measured in the mono-cylinder SI Floating Liner engine at 5 operational conditions. Effect of cylinder roughness on friction is discussed by reciprocating bench tests. Compared with a typical 1.2/1.2/2.0 mm SI ring pack, the proposed 1.0/1.0/1.5 mm pack brought about 28% reduction in ring friction in the tested conditions, which would mean in about 1% of fuel savings in urban use.

scholarly journals Investigations of the Friction Losses of Different Engine Concepts. Part 2: Sub-Assembly Resolved Friction Loss Comparison of Three Engines

Lubricants ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 105 ◽  
Author(s):  
Christoph Knauder ◽  
Hannes Allmaier ◽  
David E. Sander ◽  
Theodor Sams
Keyword(s):  
Friction Reduction ◽  
Valve Train ◽  
Friction Loss ◽  
Specific Power ◽  
Combined Approach ◽  
Tribological Behaviour ◽  
Engine Operation ◽  
Gasoline Engines ◽  
Lubrication Regimes ◽  
Wide Range

In this work, friction loss investigations and comparisons of three different four-cylinder engines for passenger car applications are presented, using a recently developed combined approach. By merging extensive experimental with reliable and predictive journal bearing simulation results, a sub-assembly-resolved friction loss analysis of the piston group, crankshaft journal bearings and valve train is conducted for all three engines. The engines have been chosen individually based on their specific power output and crank train geometry. The measurement program covers a wide range of corresponding engine operation points (identical speed, load and thermal boundary conditions). In addition, the investigations are carried out for different engine media supply temperatures ranging from 70 ∘ C to 110 ∘ C for a comprehensive consideration of the friction losses at reduced lubricant viscosity. For reasons of comparability, all investigations conducted in this work have been carried out using the same modern SAE 5W30 lubricant. This is done to exclude influences from different lubricant properties which may have significant effects on the tribological behaviour of the engines’ sub-assemblies. While the diesel engine showed a friction reduction potential over the entire engine operation range when increasing the engine media supply temperatures, the gasoline engines showed a different behaviour. For the gasoline engines, disadvantages arise especially at low engine speeds. By using the developed combined approach, it was possible to assign mixed lubrication regimes at the valve train systems and at the piston groups.

Governing Gas and Gasoline Engines

1903 ◽  
Vol 56 (1458supp) ◽  
pp. 23369-23369
Author(s):  
Dugald Clerk
Keyword(s):  
Gasoline Engines
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