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Next Generation Diblock Viscosity Modifier for Heavy Duty Diesel Engine Lubricants
Technical Paper
2016-01-2315
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An unprecedented global focus on the environment and greenhouse gases has driven recent government regulations on automotive emissions across the globe. To achieve this improvement, Original Equipment Manufacturers (OEMs) have advocated a progressive move towards the use of low viscosity grade oils. However, the use of lower viscosity grades should not compromise engine durability or wear protection. Viscosity modifiers (VM) - polymeric additive components used to tailor the lubricant’s viscometric properties - have been viewed as a key enabler for achieving the desirable balance between fuel economy and engine durability performance. Self-assembling diblock copolymers represent a unique class of VMs, which deliver superior shear stability due to their tunable association/dissociation in the lubricating oil. Superior shear stability ensures that the oil viscosity and its ability to offer reliable engine protection from wear is retained over the life of the oil in the engine. In addition, some polystyrene containing diblock VMs can help to boost soot dispersancy due to polystyrene block adsorption onto the soot surface. This additional feature helps in preventing soot aggregation, thereby maintaining lubricant viscosity within desirable range and potentially reducing soot induced abrasive wear in the engine. Here we present a next generation diblock VM designed for high quality base stock applications and its performance attributes in top-tier heavy duty diesel (HDD) formulations. In particular, we demonstrate shear stability and soot dispersancy credits of this VM in bench, engine and field tests, as well as the ability to formulate low viscosity oils without compromising engine durability.
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Shen, X., Taribagil, R., Briggs, S., and Goldmints, I., "Next Generation Diblock Viscosity Modifier for Heavy Duty Diesel Engine Lubricants," SAE Technical Paper 2016-01-2315, 2016, https://doi.org/10.4271/2016-01-2315.Also In
References
- Tanaka , H. , Nagashima , T. , Sato , T. , and Kawauchi , S. The Effect of 0W-20 Low Viscosity Engine Oil on Fuel Economy SAE Technical Paper 1999-01-3468 1999 10.4271/1999-01-3468
- Okuyama , Y. , Shimokoji , D. , Sakurai , T. , and Maruyama , M. Study of Low-Viscosity Engine Oil on Fuel Economy and Engine Reliability SAE Technical Paper 2011-01-1247 2011 10.4271/2011-01-1247
- Covitch , M. , Brown , M. , May , C. , Selby , T. et al. Extending SAE J300 to Viscosity Grades below SAE 20 SAE Int. J. Fuels Lubr. 3 2 1030 1040 2010 10.4271/2010-01-2286
- Ushioda , N. , Miller , T. , Sims , C. , Parsons , G. et al. Effect of Low Viscosity Passenger Car Motor Oils on Fuel Economy Engine Tests SAE Technical Paper 2013-01-2606 2013 10.4271/2013-01-2606
- Manni , M. and Florio , S. An Experimental Evaluation of the Impact of Ultra Low Viscosity Engine Oils on Fuel Economy and CO2 Emissions SAE Technical Paper 2013-01-2566 2013 10.4271/2013-01-2566
- Carvalho , M. , Richard , K. , Goldmints , I. , and Tomanik , E. Impact of Lubricant Viscosity and Additives on Engine Fuel Economy SAE Technical Paper 2014-36-0507 2014 10.4271/2014-36-0507
- van Dam , W. , Kleijwegt , P. , Torreman , M. , and Parsons , G. The Lubricant Contribution to Improved Fuel Economy in Heavy Duty Diesel Engines SAE Technical Paper 2009-01-2856 2009 10.4271/2009-01-2856
- van Dam , W. , Miller , T. , Parsons , G. , and Takeuchi , Y. The Impact of Lubricant Viscosity and Additive Chemistry on Fuel Economy in Heavy Duty Diesel Engines SAE Int. J. Fuels Lubr. 5 1 459 469 2012 10.4271/2011-01-2124
- van Dam , W. , Miller , T. , and Parsons , G. Optimizing Low Viscosity Lubricants for Improved Fuel Economy in Heavy Duty Diesel Engines SAE Technical Paper 2011-01-1206 2011 10.4271/2011-01-1206
- Mc Geehan , J. , Alexander , W. , Ziemer , J. , Roby , S. et al. The Pivotal Role of Crankcase Oil in Preventing Soot Wear and Extending Filter Life in Low Emission Diesel Engines SAE Technical Paper 1999-01-1525 1999 10.4271/1999-01-1525
- Gauthier , A. and Delvigne , T. Soot Induced Cam Wear in Diesel Engines: An Investigation Using Thin Layer Activation SAE Technical Paper 2000-01-1990 2000 10.4271/2000-01-1990
- Ishiki , K. , Oshida , S. , Takiguchi , M. , and Urabe , M. A Study of Abnormal Wear in Power Cylinder of Diesel Engine with EGR - Wear Mechanism of Soot Contaminated in Lubricating Oil SAE Technical Paper 2000-01-0925 2000 10.4271/2000-01-0925
- Li , S. , Csontos , A. , Gable , B. , Passut , C. et al. Wear in Cummins M-11/EGR Test Engines SAE Technical Paper 2002-01-1672 2002 10.4271/2002-01-1672
- Duncan , D. , Rees , M. , Szabo , A. , and Williams , L. Soot Related Viscosity Increase - A Comparison of the Mack T-11 Engine Test to Field Performance SAE Technical Paper 2004-01-3009 2004 10.4271/2004-01-3009
- GREEN , D. and LEWIS , R. Investigation of Soot Contaminated Lubricant Wear Mechanisms SAE Technical Paper 2007-01-1964 2007 10.4271/2007-01-1964
- Ritchie , Andrew JD et al. EGR Equipped Diesel Engines and Lubricating Oil Compositions U.S. Patent No. 6,715,473 6 Apr. 2004
- Cui , J. , Oberoi , S. , and Briggs , S. and Goldmints , I. A Viscosity Modifier Solution to Reconcile Fuel Economy and Durability in Diesel Engines Tribology International, 2016, Tribology International 101 2016 43 48
- Mandema , W. , Zeldenrust H. , and Emeis C. A. Association of Block Copolymers in Selective Solvents, 1. Measurements on Hydrogenated Poly(styrene-isoprene) in Decane and in Trans-decalin Die Makromolekulare Chemie 180 6 1979 1521 1538
- Mandema , W. , Emeis C. A. , and Zeldenrust H. Association of Block Copolymers in Selective Solvents 2. Viscosity, Diffusion and Light-scattering Measurements on Hydrogenated Poly(styrene-isoprene) in Trans-decalin/decane mixtures Die Makromolekulare Chemie 180 9 1979 2163 2174
- Higgins , J. S. , Dawkins J. V. , Maghami G. G. , and Shakir S. A. Study of Micelle Formation by the Diblock Copolymer Polystyrene-b-(ethylene-co-propylene) in Dodecane by Small-angle Neutron Scattering Polymer 27 6 1986 931 936
- Higgins , J. S. , Blake S. , Tomlins P. E. , Ross-Murphy S. B. , Staples E. , Penfold J. , and Dawkins J. V. Comparison of the Structural and Rheological Consequences of Micelle Formation in Solutions of a Model Di-block Copolymer Polymer 29 11 1988 1968 1978
- Velichkova , R. , Toncheva V. , Antonov C. , Alexandrov V. , Pavlova S. , Dubrovina L. , and Gladkova E. Styrene-isoprene Block Copolymers. II. Hydrogenation and Solution Properties Journal of Applied Polymer Science 42 12 1991 3083 3090
- Bang , J. , Jain S. , Li Z. , Lodge T. P. , Pedersen J. S. , Kesselman E. , and Talmon Y. Sphere, Cylinder, and Vesicle Nanoaggregates in Poly (styrene-b-isoprene) Diblock Copolymer Solutions Macromolecules 39 16 2006 5583 5583
- Choi , Soo-Hyung , Bates Frank S. , and Lodge Timothy P. Structure of Poly (styrene-b-ethylene-alt-propylene) Diblock Copolymer Micelles in Squalane The Journal of Physical Chemistry B 113 42 2009 13840 13848
- Choi , Soo-Hyung , Bates Frank S. , and Lodge Timothy P. Small-Angle X-ray Scattering of Concentration Dependent Structures in Block Copolymer Solutions Macromolecules 47 22 2014 7978 7986
- Cui , J. , Oberoi , S. , Goldmints , I. , and Briggs , S. Field and Bench Study of Shear Stability of Heavy Duty Diesel Lubricants SAE Int. J. Fuels Lubr. 7 3 882 889 2014 10.4271/2014-01-2791