Engineering Abstracts 1969
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Engineering Abstracts from 1969
Fuel Pump
Bryce Berger Ltd. have introduced the F-size fuel injection pump, which has a plunger stroke of 50 mm and which can be fitted with plunger barrels of from 36 to 50 mm bore giving a maximum output of 32 cm1 per stroke. It is designed
to operate at injection pressures in excess of 1100 kg/cm2 (15 500 lb/in2) and is suitable for engines with running speeds of 400 rev/min and over. The pump body is in two parts and these are tied, together with the heavy collar securing the delivery valve head, by four long through-studs which transfer the pumping stresses to the lower part of the housing. This construction has an additional benefit in that it is possible to provide a number of alternative configurations for the fuel inlet and control rod positions. Patented features in the plunger design are available to ensure complete control of the pumping rates at the end of injection. Forced lubrication is applied to the plunger and the tappet block, both of which are located by keys. The robust cam-follower tappet assembly is fitted with a roller which, although wide enough to remain conservatively stressed, can incorporate large edge radii for use on direct-reversing engines. This pump is suitable for the new generation of medium-speed engines now coming forward with outputs of 1000 bhp per cylinder and upwards.
—Marine Engineer and Naval Architect, May 1969, Vol. 92, p. 206.