Abstract
The effects of different lubricating oils on exhaust hydrocarbon emissions from a gasoline-fuelled engine have been studied. Unburned hydrocarbon formation due to fuel absorption/desorption in the cylinder liner lubricating oil film has been reviewed to support the investigation. Six lubricant types have been tested: two synthetic oils (SAE 5W30 and SAE 5W40), two semi-synthetic oils (SAE 15W40 and SAE 20W50), and two mineral oils (SAE 15W40 and SAE 20W50). Experiments were performed in a production engine mounted in a bench test dynamometer, varying engine speed through the load applied in the dynamometer in the range from 1500 to 6000 rev/min. A strong correlation between hydrocarbon emissions and lubricant viscosity has been found. Synthetic oils showed the lowest hydrocarbon emission levels, especially at low engine speed operation.
| Original language | English |
|---|---|
| Title of host publication | Society of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2010 |
| Publisher | Society of Tribologists and Lubrication Engineers |
| Pages | 373-375 |
| Number of pages | 3 |
| ISBN (Print) | 9781617387272 |
| Publication status | Published - 10 Nov 2010 |
| Event | Society of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2010 - Las Vegas, NV, United States Duration: 16 May 2010 → 20 May 2010 |
Conference
| Conference | Society of Tribologists and Lubrication Engineers Annual Meeting and Exhibition 2010 |
|---|---|
| Country/Territory | United States |
| City | Las Vegas, NV |
| Period | 16/05/10 → 20/05/10 |
Keywords
- Automotive
- Gasoline engine oils
- Viscosity