Corrective Action Program for Bromochloromethane-Containing Fire-Safe Diesel Fuel.
SOUTHWEST RESEARCH INST SAN ANTONIO TEX ARMY FUELS AND LUBRICANTS RESEARCH LAB
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Following a laboratory-engine endurance test of bromochloromethane BCM fire-safe fuel FSF in a 12-cylinder, air-cooled, four-cycle AVDS 1790-2C diesel engine conducted by Teledyne Continental Motors, a multifaceted experimental program was originated by MERADCOMAFLRL Mobility Equipment Research and Development CommandArmy Fuels and Lubricants Research Laboratory to establish whether or not fixes could be developed to overcome the problems that caused the engine endurance test to be terminated after 150 rather than the intended 400 operating hours. Recapitulation of test events, detailed post-test examinations of engine parts and used lubricant samples, and follow-through experimental studies by MERADCOMAFLRL confirmed or indicated plausible mechanisms for the observed difficulties. First, the fuel pump plunger rod sticking problem was confirmed to have been caused by corrosion at the fuel-oil interface second, the fuel injector valve sticking was caused by a lacquer-like deposit third, the fuel injector nozzle holes had become substantially enlarged and elongated by predominately corrosive mechanisms fourth, excessive distress experienced by the oil-control piston ring appeared to have resulted from combined effects of stress corrosion cracking caused by HCl and scuffing caused by inadequate lubrication and fifth, oil filter plugging was found to have resulted from the formation of halon by-product and wear-metal-containing sludge in the lubricant.
- Safety Engineering