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Development of the PV-2 Engine Deposit and Wear Test-An ASTM Task Force Progress Report

1987; Linguagem: Inglês

10.4271/872123

2688-3627

William Nahumck, Charles W. Hyndman, Serge A. Cryvoff,

Lubricants and Their Additives

An ASTM Task Force was formed in 1979 to improve the discriminatory abilities for engine sludge deposits and valve train wear of the ASTM Sequence V-D test. Several statistically designed programs were conducted to identify procedural and hardware items to achieve the state objectives. The 2.3 liter, four cylinder test engine was updated with electronic fuel injection and high swirl combustion chamber technology. Of the parameters evaluated, increased test length, adjustments of temperatures and control of the rocker cover temperature had the greatest impact on increased test severity. A procedure has been developed that better discriminates between known good and poor engine oils. Field correlation has been improved and expanded to include European experience. An extensive program has been planned to establish field correlation and test precision.