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An investigation into effects of multiple fuel introduction on isfc, rate-of-pressure rise, ignition delay, and smoothness of P-T diagram was conducted. Work, including pilot and manifold injection and the Vigom process, was conducted in a prechamber, an open chamber, and a Ricardo Comet chamber, all mounted on a CFR crankcase. Results show marked smoothening of the P-T diagram, with slight loss in fuel economy, particularly in the open chamber, and decrease in ignition delay for both high and low cetane fuels, especially at lower engine speeds. Data show that the quantity of preliminary fuel required for best performance changes considerably with cetane number of the fuel and with combustion chamber.

To meet future world energy demands, the engineer’s task will be to develop, through research, means of supplying new sources of energy. Though nuclear processes and solar energy will provide future energy, they are not readily adaptable to portable power systems due to inherent shortcomings. Energy can be supplied to portable power systems by energy storage systems using chemical, mechanical, or electrical forms, or it may be supplied through energy-in-transit systems. Technical discussion of various systems is presented. To develop suitable energy storage systems, thought must be given to problems of construction, operation, maintenance, and economics. Research is necessary to determine which chemical fuels are most adaptable for internal combustion engines.

A NEW electronic circuit arrangement added to the electro-optical pyrometer developed at the University of Wisconsin indicates instantaneously the temperature in the combustion chamber of a diesel engine. The electronic device, which is described in this paper, solves an equation relating true temperature to intensity and wave length of monochromatic radiation from a luminous flame. True flame temperature is charted on an oscillograph as a function of such abscissas as time or crank angle. Several circuits are reviewed which were found unsuited for use with the pyrometer but which may be useful for other applications.