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February, 1927 MARINE REVIEW 27 control is opened suddenly it comes up to speed in the same way that a high grade automobile engine speeds up when the throttle is sudden- ly opened. The individual cams which operate the fuel pumps and the air starting valves are mounted on the lay shaft which is driven by the gear train previous- ly mentioned. The governor is also driven by a worm gear from this lay shaft. There is one important dif- Cooling Water Fuel Injection Nozzle ; eccentric actuates a rocker | Outlet Manifold arm which in turn drives the piston of the compressor through a link connection. The piston rod of this com- pressor is extended so that it becomes the piston rod for the pump. This pump is double acting with two sets of valves, one side of the pump being used for circulating water and_ the other side as a bilge pump. This arrangement is a very simple one, compact and yet Combustion Space Compression Relief Discharge Valve : Suction Valve tt a Fuel Inlet A. Injection Pump “ Plunger Exhaust Manifold Cooling Water ‘ Governor Control Shaft bn Injection Pump Exhaust URocker Port >—~Injection Pump }. Cam Starting Air Se PO gaa x é Inlet Port Air Suction Valve accessible. The shaft which carries the idler gear of the. lay shaft train also carries an eccentric which drives two plunger lubricating oil pumps. One of these pumps takes its suction from the crank case compartment previously mentioned and pumps the oil under pres- sure to the lay shaft bear- ings and to such rockers, rollers and pins that go to make up the injection and governor pump drives and the compressor and pump drives. The other pump takes the oil from the individual crank case of each cylinder and pumps it to the filter. Since the oil used in engines of this rating is a comparatively small amount, the filtering can be handled in batches and the oil is poured back into the main lubricating sump or to the force-feed lubricator, thus always insuring clean oil. This force-feed lubricator lubricates the piston pin and the cylinders. The Ce . Pie sata Pr iia OPERATING SIDE OF 4-CYLINDER 40-HORSEPOWER MARINE DIESEL Counter-Weight SECTION THROUGH CYLINDER’ OF 20-HORSEPOWER AIRLESS INJECTION DIESEL ENGINE crank pins and main bearings are also lubricated by force-feed lubrica- tion from this lubricator. It can be seen from this brief description, there- fore, that every part of the engine is automatically lubricated. In order to get a really good idea of the unusual flexibility of this en- gine it is necessary to see it in cp- eration and to actually manipulate the controls. The control is simple and yet it functions so perfectly that the engine will throttle down to a very low speed and when the manual ‘linkage arrangement. ference in the fuel injection scheme which is used with this line of engines and that which is used in other Fair- banks-Morse diesels. The amount of fuel injected is controlled by the length of the injection pump plunger stroke and not by the closing of the suction valves. The suction valves are automatic in their operation, that is, they open and admit fuel to the barrel of the injection pump on the down stroke of the plunger. The stroke of the plunger is regulated through a very simple The governor control shaft, as shown in the accom- panying transverse section of the en- gine, is pivoted eccentrically so that any movement of the governor weights tends to move the pump plunger push rod with respect to the cam operated rocker arm. The position of the push rod on this rocker determines the amount of fuel injected by the pump (Continued on page 46) 2-CYCLE eatuuaiantcs ota mer ENGINE WITH EN-BLOC CYLINDERS—SIMPLE AND COMPACT