Fibre inserts for pistons
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• Use of fibre-reinforced inserts for pistons may well play an important part in the development of high output diesel engines, it was revealed at the open day of the Associated Engineering Group at Cawston House, near Rugby, on Tuesday. The inserts. of U-shaped form, are incorporated in the gudgeon-pin bosses to provide resistance to fatigue. Embedded in a metal or plastics matrix, the fibres so far employed have included carbon and steel wire.
Chemical refinement of diesel piston
structures is also included in AE research work. This will offset the coarsening effect of the slow cooling of cast structure consequent upon the large mass of metal. in diesel pistons. Reducing thermal shock to piston crowns by various means should enable crown temperatures to be increased from 220deg C to 325deg C. Research projects should also provide for the continued use of aluminium silicone alloy for piston application. This metal casts and machines well.
An ultrasonic collision device (for use in fog) was demonstrated; it would indicate the presence of a vehicle as far as 50 to 100yd ahead of the vehicle to which it was fitted.