Diesel engines for land and marine work . Fig. 33.—Exhaiist Valve (section). valves may be set and never touched once the engine hasbeen put to work. A small fuel pump is provided whichpumps the oil to the fuel valve through a connecting deliverypipe. The oil is drawn into the pump cylinder on the up 80 DIESEL ENGINES FOR LAND AND MARINE WORK. % b I Fig. 34.—Arrangement of Governor and Fuel Valve of Mirrlees, Bickerton & Day Type. stroke of the pump plunger, through a small valve, andon the down stroke this valve remains open for a short period,after which all the oil is pumped into the cylind
Diesel engines for land and marine work . Fig. 33.—Exhaiist Valve (section). valves may be set and never touched once the engine hasbeen put to work. A small fuel pump is provided whichpumps the oil to the fuel valve through a connecting deliverypipe. The oil is drawn into the pump cylinder on the up 80 DIESEL ENGINES FOR LAND AND MARINE WORK. % b I Fig. 34.—Arrangement of Governor and Fuel Valve of Mirrlees, Bickerton & Day Type. stroke of the pump plunger, through a small valve, andon the down stroke this valve remains open for a short period,after which all the oil is pumped into the cylinder. The CONSTRUCTION OF THE DIESEL ENGINE 81 period during which the suction valve remains open inthe down stroke of the phniger of the pump, is controlledby the governor, so that if the speed rises too high the suctionvalve is held open for a longer time, and less oil is deliveredto the engine cylinder, whereas if the speed is low the suctionvalve closes almost immediately at the beginning of thedown stroke of the plunger, and most of the oil drawn induring the suction stroke is pumped into the cylinder dur-ing the delivery stroke. In multi-cylinder engines somemakers prefer to have a separate fuel pump for each cylin-der, whilst others employ only one pump for supplying allthe cylinders, though this is perhaps on the whole not
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