Accession Number:

ADA257893

Title:

Evaluation of High-Temperature Lubricants for Low-Heat Rejection Diesel Engines

Descriptive Note:

Interim rept. Oct 1983-Mar 1988

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TXBELVOIR FUELS AND LUBRICANTS RESEARCHFACILITY

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

72.0

Abstract:

A single-cylinder diesel engine was modified to simulate a low-heat rejection LHR engine, and it was used to develop lubrication requirements for future Army LHR diesel engines. Several high-temperature lubricant HTL candidates were evaluated, and the simulated LHR engine discriminated HTL deposition performance over a range of engine cylinder wall temperatures CWTs. Three HTLs were identified that had promising performance at CWTs of 600 deg F 316 deg C while none were adequate at 650 deg F 343 deg C. Oil was collected and analyzed from the ring zone of the simulated LHR engine. Oil degradation was as much as 3.7 times more severe in the ring zone as compared to the oil sump. Preliminary oxidation and friction-wear bench tests were investigated. New and used oil analyses flow charts were developed, and analytical techniques to separate and identify HTL additives and base stocks were developed.

Subject Categories:

  • Lubricants and Hydraulic Fluids
  • Surface Transportation and Equipment
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE