The trend toward lighter vehicles for improved performance has recently introduced the use of aluminum and plastic materials for vehicle bodies and drive trains. In particular, the aluminum alloy block for engine application is certain to reappear. The soft aluminum cylinder liner will require additional treatment before acceptance. Three possible approaches appear to solve the aluminum cylinder liner dilemma. These approaches are: Each has known advantages and disadvantages. It is the purpose of this paper to present the merits of Option 3, the ceramic coated aluminum cylinder bore from the standpoint of low weight, cost, and tribological effectiveness.The advantages of approaches (1) and (2) are obvious. High temperature after treatment of the ceramic engine components is not required. Aluminum properties are such that one must carefully observe changes in physical properties of aluminum such as creep, aging, stress/strain and other important properties dependent upon temperature. Therefore, a ceramic coating possessing low curing temperature is highly desirable. A low temperature organo-metallic phosphate (OMP) coating developed recently for aluminum alloy substrates is expected to meet requirements of lowered cost and improved effectiveness for engine applications.Engine tests were conducted to determine the effectiveness of this ceramic composite coating. The aluminum engine block of an 84mm x 70 mm (bore × stroke) single cylinder diesel engine was ceramic composite coated and laboratory rig tested. Preliminary engine test data reflects the improved cylinder liner coating over the steel or cast iron mating parts. A reduction in fuel consumption due to friction reduction, thermal insulation, and possible improvement in combustion have been demonstrated and observed in SAE Paper 910461(1). The thin coated cylinder liner and its advantage has been further discussed in previous literature SAE Paper #890143(4).The ceramic composite coating on aluminum has performed well. The coating can also be applied in the form of silicon nitride, other nitrides, or carbides onto aluminum, titanium or stainless steel substrates. Durability tests are currently underway to demonstrate the viability of these ceramic coated aluminum components for tribology and insulation of future engine components.


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    Titel :

    Ceramic Coatings for Aluminum Engine Blocks


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Valdmanis, Edgars (Autor:in) / Kamo, Lloyd (Autor:in) / Kamo, Roy (Autor:in)

    Kongress:

    Automotive Industry in Expanding Countries ; 1991



    Erscheinungsdatum :

    01.09.1991




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Ceramic coatings for aluminium engine blocks

    Kamo,L. / Kamo,R. / Valdmanis,E. | Kraftfahrwesen | 1991


    Ceramic Coatings for Engine Parts

    Schroeder, J. E. | NTRS | 1985


    Aluminum 390 Alloy Engine Blocks: Design and Manufacturing

    Wacker, Erich / Hofmann, Hans-Heinz / Schellmann, Klaus | SAE Technical Papers | 1983



    Engine Blocks and their Components in ALUMINUM DIE CASTING

    Bauer, A. F. | SAE Technical Papers | 1960