Accession Number:

ADA142426

Title:

High-Temperature Lubricants for Minimum-Cooled Diesel Engines

Descriptive Note:

Interim rept. Oct 1980-Nov 1983

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX BELVOIR FUELS AND LUBRICANTS RESEARCH FACILITY

Personal Author(s):

Report Date:

1983-11-01

Pagination or Media Count:

77.0

Abstract:

Lubricant performance at high temperatures was defined using an uncooled single-cylinder diesel engine operated at conditions which simulate a minimum-cooledadiabatic diesel engine. The following lubricant-related problems were observed Lubricant oxidation--oil too thick to pump corrosive products formed and bearings attacked Lubricant volatility--high oil consumption, oil thickening, and Engine deposits--ring sticking. A variety of high-temperature candidate lubricants was evaluated in the uncooled single-cylinder diesel engine. While these two oils had the best overall high-temperature performance of the candidates tested, they were still deficient in oxidation stabilityoil thickening properties. High-pressure differential scanning calorimetry HPDSC and FTM5308 were investigated for use as high-temperature lubricant bench screening methods. Neither method was completely satisfactory, and additional development of a bench oxidation screening technique is needed.

Subject Categories:

  • Lubricants and Hydraulic Fluids
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE