Oil quality in diesel engines with on line oil cleaning using a heated lubricating oil recycler

摘要

A method of cleaning the oil on line was investigatedusing a bypass fine particulate filter followed by an infraudred heater to remove water and light diesel fractions inudthe oil. This was tested on a range of on road vehiclesudand a Ford 1.8 litre IDI passenger car engine on a testudbed. Comparison was made with the oil quality on theudsame vehicles and engines without the on-line recycler.udTest times were from 200 to 1500 hours of oil ageing andudsome of the tests showed that the oil quality was stilludgood after 4 times the normal oil life. The results showedudthat the on line oil recycler cleaning system reduced theudrate of fall of the TBN and rate of increase of the TAN.udThere was a very significant reduction in the soot in oiludand the fuel dilution. There was also a consistent reductionudin all the wear metals apart from copper and auddecrease in the rate of reduction of oil additives. Thereudwas also measured on the Ford IDI engine a 5% reducedudfuel consumption. Many of these effects were attributedudto an influence of the cleaner oil on reduced engineuddeposits.