RI 3700 Diesel Engines Underground. IV. Effect on Composition of Exhaust Gas of Variables Influencing Fuel Injection

 Previous reports of this series/7/8/ presented data on the composi- tion of exhaust gases produced by Diesel engines operating under various conditions possible in underground workings. In all previous experiments, the engines tested were in proper mechanical condition; that is, they were adjusted and maintained in accordance with the manufacturer's instructions. In discussing the results of these tests in relation to the use of Diesel engines underground, the importance of maintaining engines in proper mechanical condition was emphasized, although no data were presented to indicate the effect of engine maladjustments on production of harmful and objectionable constituents of exhaust gas. It is the purpose of this report to present such data and to reemphasize the importance of adequate maintenance for Diesel engines used underground.