Performance Test Methods for Two-Stroke Cycle Engine Lubricants Including Lean Fuel-Oil Ratio Conditions

Eberan-Eberhorst, C. G. A.; Martin, Harold R.

doi:10.4271/790078

Cited by 2 publications

(1 citation statement)

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“…The amount of unbumt hydrocarbon in a normally run engine in the exhaust stream can reach the level of 10-12%. 4 However, in a polynuclear aromatics (PNA) emission mechanism study? the pyrolysis of the lubricating oil present in the combustion chamber was named as the apparent cause of high PNA emission, when the oil consumption in the four-stroke engines was artificially increased.…”

Section: Introductionmentioning

confidence: 99%

Synthetic two‐stroke engine oil as a tool of exhaust emission control

Kovács¹,

Olagos²

1990

J of Synthetic Lubrication

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Polypropylene oligomers were used to formulate two‐stroke (2T) engine oil for once‐through lubrication systems, to enhance the exhaust emission characteristics of two‐stroke engines. The oligomers alone are suitable from a stability viewpoint, but must be reinforced with polyol‐ester components to have good load‐carrying capability. Both ash‐forming and ash‐free commercial additive packages can be used to formulate the end‐product. The exhaust stream includes the unburnt portion of the fuel:oil mixture. The lubricating oils formulated on polypropylene oligomer base do not contain polynuclear aromatics, the sulphur‐dioxide emission is due to the sulphur content of the fuel and additive (if any). On a bench test, the hydrocarbon emission was significantly lower using polypropylene oil, in comparison to using a commercial mineral‐oil‐based composition.

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Section: Introductionmentioning

confidence: 99%