New Diesel Engine Oil Category for 1998: API CH-4

Geehan, J. A. Mc; Franklin, T. M.; Bondarowicz, F.; Bowen, Thomas; Wang, J.; Graham, John; Fetterman, G. P.; Quinn, Michael J.; Juett, R. L.; Larkin, D.; Lee, R.; Kennedy, S.; Marn, D.; Büscher, Wolfgang; Olree, B.; Passut, Charles A.; Shank, G.; Lawrence, Betty

doi:10.4271/981371

Cited by 20 publications

(5 citation statements)

References 5 publications

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“…SOOT CONTROL Increasingly stringent emissions legislation was introduced in the USA and Europe during the 1990s. This has resulted in radical changes in heavy-duty diesel engine design, which in turn have had a significant impact on the lubricant environment, affecting the relationship between oil formulation, piston deposits, soot dispersion, and wear control [31,32]. In particular, tightening of the NO x legislation led to a widespread retardation of injection timing, which has led to increased levels of soot loading of the engine lubricant, which has been associated with increased wear levels.…”

Section: Heavy-duty Diesel Engine Oilmentioning

confidence: 99%

“…For API CH-4 the same viscosity increase limit is used, together with a relative viscosity increase limit measured at 4. [32,34,35]. A steel tyre rests directly on individual inlet and exhaust cams and rolls over the cam surface throughout the engine's operating cycle.…”

Section: Heavy-duty Diesel Engine Oilmentioning

confidence: 99%

“…3. The Cummins M11 cross-head wear test forms part of the API CG-4 and CH-4 oil specification tests [32,34]. The cross-head is a component of the Cummins M11 valve train system (each of the inlet and exhaust rocker arms actuate two valves with the load transferred by a simple bridge piece, known as a cross-head).…”

Section: Heavy-duty Diesel Engine Oilmentioning

confidence: 99%

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Engine Lubricant Trends Since 1990

Taylor

Mainwaring

Mortier

2005

Proceedings of the Institution of Mechanical Engineers, Part J:

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A review is undertaken of the important trends in engine lubricant performance tests that have taken place over the last 10-15 years. Lubricant formulations are driven by industry standard specifications, original equipment manufacturer requirements, and consumer needs. A review is given of the important specifications and associated performance tests, and how these have impacted on lubricant development. The key trends are, firstly, the need for improved fuel economy, secondly, the need for improved oxidation stability, thirdly, the need for improved handling of contaminants (e.g. soot), and, fourthly, the recent move to lubricants containing low levels of sulphur, phosphorus, and sulphated ash, for after-treatment device compatibility reasons.

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Section: Heavy-duty Diesel Engine Oilmentioning

confidence: 99%

Section: Heavy-duty Diesel Engine Oilmentioning

confidence: 99%

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Engine Lubricant Trends Since 1990

Taylor

Mainwaring

Mortier

2005

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Limits are set on the amount of wear on the central pin. This test was incorporated into the API CG-4 with a limit of 0.45 mils (11.4 µm) and CH-4 with a reduced limit of 0.30 mils (7.62 µm) [9][10].…”

Section: Use Of Api Cg-4 and Api Ch-4 Oil Formu-lations For Needle Bementioning

confidence: 99%

Preventing Catastrophic Camshaft Lobe Failures in Low Emission Diesel Engines

Geehan¹,

Ryason²

2000

SAE Technical Paper Series

Self Cite

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“…According to the actual operation characteristics of the engine, the selection of suitable lubricating oil has a direct effect on the performance of the engine. At present, domestic diesel engine lubricating oil specification uses the American Petroleum Institute (API) specification [2][3][4][5][6][7][8] . OEM proposes that the US API specifications are no longer suitable for the needs of domestic diesel engine manufacturers for long oil change intervals, user convenience, and reduced maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Correlation study of fuel injection strategies on engine emission and lubricating oil performance

Wang

Zhang

et al. 2021

E3S Web Conf.

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Based on different fuel injection strategies, this paper analyzes the factors such as engine original emission smoke, exhaust temperature, soot content, wear spot diameter and kinematic viscosity. The study found that delaying injection timing, increased afterburn, engine original soot emissions, exhaust gas temperature increase, but will increase the thermal load of the parts. At the same time, the growth rate of lubricant soot and kinematic viscosity increased; The wear spot diameter at the same soot content is reduced, and the wear is reduced. In the end, the paper finally selects 1°CA BTDC as the optimal fuel injection strategy to achieve rapid aging of engine lubricating oil in order to complete the assessment of the anti-wear performance of lubricating oil.

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New Diesel Engine Oil Category for 1998: API CH-4

Cited by 20 publications

References 5 publications

Engine Lubricant Trends Since 1990

Engine Lubricant Trends Since 1990

Preventing Catastrophic Camshaft Lobe Failures in Low Emission Diesel Engines

Correlation study of fuel injection strategies on engine emission and lubricating oil performance

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