Effects of Engine Oil Composition on Diesel Particulate Filter

Hoshino, Koji; Hirata, Masakuni; Kurihara, Isao; Takeshima, Shigeki

doi:10.4271/2005-08-0141

Cited by 3 publications

(1 citation statement)

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“…For instance, ash accumulation in DPFs, if in excess, decreases the ability of the DPF to be fully regenerated, thereby increasing engine back-pressure and reducing fuel economy. A recent review specifically on the effects of SAPS has been made by Bodek and Wong [24], in which data on both accelerated tests and field tests show mostly irreversible increased back pressure with ash accumulation [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Exhaust Ash Emissionsmentioning

confidence: 99%

Bridging macroscopic lubricant transport and surface tribochemical investigations in reciprocating engines

Wong

Thomas

Watson

2007

Proceedings of the Institution of Mechanical Engineers, Part J:

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Engine design studies are often conducted with one of two distinct focuses on two different scales: overall engine analysis or localized surface analysis. However, recent engine research requires a more combined approach. Classical tribological experiments and models have been developed usually for general contacting surfaces under specific operating conditions. They attempt to simulate the actual engine environment, which varies significantly with component design and engine operating conditions. Macroscopic engine studies, on the other hand, yield information pertaining to the overall engine system, such as component dynamics, lubricant flow, pressures, and temperatures. These macroscopic operating parameters serve as boundary conditions to the localized surface or tribochemical problem. This paper discusses the macroscopic oil transport processes in the engine and presents several current engine performance problems, such as in friction reduction, modelling wear with antiwear tribofilms, and minimizing deposit formation and emission of ash-related species. It also illustrates applications of the combined analysis of bulk oil transport in the engine with material surface phenomena and tribochemistry. A specific example involves the oil supply to the piston ring-pack and changes in oil and additive characteristics in that region.

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