Balancing Crankcase Lubricant Performance with Catalyst Life

Chamberlin, William B.; Zalar, F. V.

doi:10.4271/841407

Cited by 20 publications

(1 citation statement)

References 15 publications

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“…contained in the lube oil additives tend to concentrate in the used oil as lighter hydrocarbon constituents of the base oil volatilize at a faster rate. Consequently the ash finding rate in the filter is lower than expected based on oil consumption inline with other studies [4,5]. Hence it is postulated that the low ash finding rate in the DPFs could be attributed to two main reasons -Firstly ash forming metals (i.e.…”

Section: Figure 9 Cumulative Ash Accumulation Linearly Correlates Tosupporting

confidence: 55%

Improved Lifetime Pressure Drop Management for Robust Cordierite (RC) Filters with Asymmetric Cell Technology (ACT)

Aravelli¹,

Heibel²

2007

SAE Technical Paper Series

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The stricter emissions legislation in the US, require the implementation of Diesel Particulate Filters (DPF) for Heavy Duty Diesel engines to meet the 2007 PM emissions targets. Cordierite based wall-flow filters with high filtration efficiency, low p and good thermal durability are the product of choice for these applications. Continuous passive oxidation of the soot by NO 2 is desired, however under certain operating and ambient conditions periodic active oxidation of the soot at elevated temperatures (>550ºC) is required. A part of the PM emissions of the engine contains noncombustible contributions (ashes). These materials accumulate in the filter over lifetime, resulting in an increase in pressure drop as well as a reduction of the filter volume available for soot accumulation. As the pressure drop rises above manageable levels from a performance perspective, ash cleaning of the filter is required. The ash storage capacity of the filter determines the service interval for the filter. Long service intervals are desired by the end customer. To mitigate the impact of the ash accumulation in the filter, Corning Incorporated has developed filters with the proprietary asymmetric cell technology (ACT), providing high ash capacity with good strength attributes. These filters have larger inlet and smaller outlet channels and therefore a higher volume available for ash storage. The present work summarizes the results of on-engine (HD) ash testing on uncoated Robust Cordierite (RC) filters-Ø267mmX305mm (Ø10.5"x12") in both Standard (200/19) and ACT (270/16) design configurations. The work demonstrates, for an equal size filter a 30% improved ash storage capacity and therefore longer service interval for the ACT design over the standard filter. Good durability of the filters for a long operation timeframe (up to 2700h) was demonstrated. Furthermore the paper summarizes a wide set of post testing evaluations, both non-destructive and destructive to understand the ash distribution and interactions in the filter.

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Section: Figure 9 Cumulative Ash Accumulation Linearly Correlates Tosupporting

confidence: 55%

Improved Lifetime Pressure Drop Management for Robust Cordierite (RC) Filters with Asymmetric Cell Technology (ACT)

Aravelli¹,

Heibel²

2007

SAE Technical Paper Series

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Effect of metal‐free phosphorus anti‐wear compounds on passenger car emissions and fuel economy

Devlin¹,

Guevremont²,

Sheets³

et al. 2007

Lubrication Science

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There has been concern for many years that phosphorus (P) from engine oils is volatilised, passes through the combustion chamber and is deposited on the catalyst system in passenger cars, causing the emission control system to lose efficiency. Therefore, as new engine oil specifications have been introduced, there has been a trend to require a reduction in P in fresh engine oils. The primary P source in current engine oils is zinc dithiophosphate (ZDP), which acts as an anti‐wear agent and antioxidant. Therefore, a reduction in P in the oil could compromise the anti‐wear and antioxidant performance of engine oils. Another detrimental effect of ZDP is that it is known to increase friction in the mixed lubrication regime, which in turn would decrease the ability of engine oils to improve fuel economy. Metal‐free P‐containing anti‐wear additives (MFPAWs) have been used for many years in other automotive and industrial lubricants. We examined the effect of an MFPAW in catalyst efficiency and fuel economy engine tests. Catalyst protection and the fuel economy benefits of engine oils were improved when the MFPAW was used in place of ZDP. Therefore, the total P content of an engine oil does not need to be reduced if the proper anti‐wear additive is selected. Copyright © 2007 John Wiley & Sons, Ltd.

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Impact of Lubricant Oil Additives on the Performance of Pd-Based Three-Way Catalysts

Kim

Toops

Nguyen

et al. 2019

Emiss. Control Sci. Technol.

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Balancing Crankcase Lubricant Performance with Catalyst Life

Cited by 20 publications

References 15 publications

Improved Lifetime Pressure Drop Management for Robust Cordierite (RC) Filters with Asymmetric Cell Technology (ACT)

Improved Lifetime Pressure Drop Management for Robust Cordierite (RC) Filters with Asymmetric Cell Technology (ACT)

Effect of metal‐free phosphorus anti‐wear compounds on passenger car emissions and fuel economy

Impact of Lubricant Oil Additives on the Performance of Pd-Based Three-Way Catalysts

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