INVESTIGATION OF SUCCINIMIDE DISPERSANTS AND THEIR INTERACTIONS USING REDUCED TOTAL OIL VOLUME LUBRICANT DEGRADATION
type: CreativeWork
description: Reduced Total Oil Volume RTOV sampling was developed from reduced sump sampling. The technique involves alterations to an engine enabling the total volume of lubricant within the engine to be reduced, without altering the basic function or operation of the engine. Critical regions where large volumes were removed were the use of a smaller oil filter and the elimination of the standard oil cooler by an internal sump oil cooler. The alterations to the engine allowed the operating volume to be reduced to over 75% of the original standard operating volume. This reduction enabled discriminatory oil degradation engine runs to be performed in only 6 hours. Operating the engine on minimal volume gave rise to oil additions being made as oil was consumed within the engine. The effect of addition of fresh oil on the used oil analysis was corrected for mathematically. A model was derived which accounted for combustion losses and also the relative volatility of the oil. Five oils were investigated, four similar in all respects apart from the dispersant; a tris-succinimide. a bissuceinimide and a mono-succinimide with the same molecular weight polyisobutylene (RIB) backbone, and a second bis-succinimide with a lower molecular weight PIB backbone. The fifth oil had the lower molecular weight PIB bis-succinimide, but had a secondary ZDDP molecule, whereas all the others had a primary ZDDP molecule. Using the R'l'OV technique on a VW 1.6 turbocharged diesel CY Series engine, a mid range and a high range speed-load point were used for each oil. Lach oil was repeated al the speed load points in triplicate. One oil was also used at 4 other speed-load points to more fully map the effect of increasing speed and load on the oil. again each point being repeated in triplicate. The maximum speed and load point also had an extended engine run of 24 hours rather than the standard 6 hours, to investigate the effect of a continuously severe environment on the oil. The oil analysis consisted of s…
abstract: Reduced Total Oil Volume RTOV sampling was developed from reduced sump sampling. The technique involves alterations to an engine enabling the total volume of lubricant within the engine to be reduced, without altering the basic function or operation of the engine. Critical regions where large volumes were removed were the use of a smaller oil filter and the elimination of the standard oil cooler by an internal sump oil cooler. The alterations to the engine allowed the operating volume to be reduced to over 75% of the original standard operating volume. This reduction enabled discriminatory oil degradation engine runs to be performed in only 6 hours. Operating the engine on minimal volume gave rise to oil additions being made as oil was consumed within the engine. The effect of addition of fresh oil on the used oil analysis was corrected for mathematically. A model was derived which accounted for combustion losses and also the relative volatility of the oil. Five oils were investigated, four similar in all respects apart from the dispersant; a tris-succinimide. a bissuceinimide and a mono-succinimide with the same molecular weight polyisobutylene (RIB) backbone, and a second bis-succinimide with a lower molecular weight PIB backbone. The fifth oil had the lower molecular weight PIB bis-succinimide, but had a secondary ZDDP molecule, whereas all the others had a primary ZDDP molecule. Using the R'l'OV technique on a VW 1.6 turbocharged diesel CY Series engine, a mid range and a high range speed-load point were used for each oil. Lach oil was repeated al the speed load points in triplicate. One oil was also used at 4 other speed-load points to more fully map the effect of increasing speed and load on the oil. again each point being repeated in triplicate. The maximum speed and load point also had an extended engine run of 24 hours rather than the standard 6 hours, to investigate the effect of a continuously severe environment on the oil. The oil analysis consisted of s…
author: Sutton, Michael Robert
license: https://dora.dmu.ac.uk/bitstreams/ff348c98-f86d-4b22-9c8e-c91e465d4a10/download
date published: 2000-10
date modified: 2026-07-24T06:18:24Z
provider: De Montfort University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: De Montfort University