A DISTINCTION is to be made between non-continuous-wear and continuous-wear measurements. To the former class belong measurements where the piston-rings are weighed or the cylinders and piston diameters are measured. Such a method takes a great deal of time, not only because of the long duration of the test itself but also because of the time necessary for the removal of the pistons, weighing, measuring, and re-assembling the engine.In the latter method, cylinder wear is measured by determining the ash content of oil dripping from the piston while the engine is running. A standard fuel and lubricating oil is used, and wear is expressed as a “wear factor”-the ratio between the weight of ash collected on the sample used and the weight of ash collected from the standard sample. This factor correlates well with actual wear measurements.Wear decreases with decreasing load, but increases again with very light loads within specified limits. Heavy fuels give slightly more wear than lighter fuels. Addition of 0.005 per cent of quartz dust into injection air multiplied the wear six times. Organic acids added to the fuel did not affect the wear. Tests with Diesel engines have proved that the temperature of the cooling water has little effect on wear. With the addition of 2 per cent or more of distilled water, wear is approximately doubled.


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    Titel :

    Cylinder Wear in Diesel Engines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Pre-1964 SAE Technical Papers ; 1906



    Erscheinungsdatum :

    1936-01-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Cylinder wear in diesel engines

    Boerlage, G.D. / Gravesteyn, B.J.J. | Engineering Index Backfile | 1936


    Cylinder wear in large diesel engines

    Hoegh, C. | Engineering Index Backfile | 1946


    Piston Ring And Cylinder Wear In - Diesel Engines -

    PENNINGTON, JOHN W. | SAE Technical Papers | 1948



    Combating cylinder wear and fouling in large low-speed diesel engines

    van der Zijden, M.J. / Kelly, A.A. | Engineering Index Backfile | 1956