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dividual castings of annealed light grade iron and are attached to the frame by heat-treated alloy steel studs. Each head carries two exhaust valves and two air-intake valves. The fuel injector is mounted in the center of the head. Fuel Injection and Governor with spring-loaded, multi-hole spray nozzles. An individual fuel pump is provided for each cylinder. The overspeed stop on this engine is of the centrifugal trip type and is driven from the cam- shaft by gears. This device shuts the engine down if the engine speed exceeds the predetermined maximum speed setting. The governor is of the hydraulic relay type, gear driven from the camshaft, and is controlled manually from the cab. The governor maintains the proper engine speed by controlling the quan- tity of fuel delivered by the injection pumps. The governor oil pressure actuates the load control valve in correct sequence through the exciter field of the electric transmission system. Engine Lubrication type, the oil being circulated by a positive dis- placement gear pump, chain-driven from the crankshaft. The lubricating oil supply is contained |
in the bedplate, from where it is drawn by the pump through the suction strainer and delivered to the radiator. After passing through the radi- ator the oil flows through a metal-edge, full-flow strainer mounted on the engine. From the main bearings it is conveyed through passages in the crankshaft and thence to the crankpin and wrist- pin bearings through the center holes in the con- necting-rods. The engine is also provided with filter equipment operating on the by-pass system. Supercharger equipped with an Elliott-Buchi Turbocharger— a self-contained unit comprising a gas turbine and a centrifugal blower mounted on a common shaft. The exhaust gas from the engine cylinder is conveyed to the turbo-charger through four pipes (two cylinders per pipe). Thus the centrif- ugal blower is driven by the energy remaining in the exhaust gas from the engine cylinder without making any demand on the power developed by the engine. The blower supplies all the air re- quired by the engine at a pressure a few pounds above atmosphere. With the Buchi system of pressure scavenging and charging the engine, the air delivered by the turbo-charger accomplishes two things: first, it scavenges the hot gases othe- wise left in the engine cylinder at the end of the exhaust stroke and replaces these hot gases with |
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