摘要:

AbstractExperimental work was carried out to evaluate the influence of synthetic lubricants on engine performances and their consequences for the environment. The effect of the rheological and compositional characteristics of lubricants on fuel efficiency, oil consumption, thermo‐oxidative stability, and wear was investigated. To this purpose, both conventional tests normally used for assessing oil quality according to European specifications and non‐conventional/in house tests were used. Among the latter, engine oil consumption, minimum oil film thickness, bearing wear, valve train wear, thermo‐oxidative stability, and high temperature deposit tests were included.Preliminary conclusions show that a 5W‐30full synthetic oil has a lower impact on the environment than a current IOW‐40 part synthetic‘European’oil and is a better compromise between fuel efficiency and oil consumption.A field test programme is in progress in order to assess general engine performance, especially oil consumption and the effect of oil on cataly

ISSN:0265-6582    

DOI:10.1002/jsl.3000120302

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractFor high‐temperature aircraft turbine engines in the next century, new, extremely stable lubricants will be required. The chemical class known as perfluoropolyalkylethers is well known for its good and wide range of temperature behaviour. This paper reports on investigations into the thermo‐oxidative stability of these fluids at high temperatures. The work includes the influence of metals on the stability, and corrosion tests, of selected PFPAE oils. The results show the large influence of the chemical structure and of certain met

ISSN:0265-6582    

DOI:10.1002/jsl.3000120303

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractA die‐less wire drawing process has been developed in order to investigate the performance on the reduction of wire size of polymer coating on steel wire. Previous experimental investigations have shown significant reductions in area particularly using nylon and borosiloxane on copper wire. The present investigation shows that satisfactory reductions can also be obtained using these polymers on steel wire. A smooth adhered coating of the wire was produced with the nylon; however, drawing speed limitations were observed where break up of the coatings occurre

ISSN:0265-6582    

DOI:10.1002/jsl.3000120304

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

摘要:

AbstractIncreasing awareness of the environmental impact of consumer and industrial products has produced a demand for lubricants that biodegrade. There is a number of biodegradation tests that can be used on lubricants, although not all are always appropriate, as this paper explains. The CEC test is among the best known and is in use for both conventional and synthetic oils. There will, in future, be a greater movement to biodegradable oils in Europe, perhaps extending to all oils.

ISSN:0265-6582    

DOI:10.1002/jsl.3000120305

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120306

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120307

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120308

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120309

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120310

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY

ISSN:0265-6582    

DOI:10.1002/jsl.3000120301

出版商:John Wiley&Sons, Ltd    

年代:1995

数据来源: WILEY