Volvo Increase Engine Power Output
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IVIODIFICATIONS to the fuel-injecIYI tion equipment of Swedish Volvo oil engines have resulted in power increases of up to 8 per cent, at unchanged governed speeds, with corresponding torque increases of up to 5 per cent. Improved fuel economy is also claimed, Development work on the fuel-injection equipment has been carried out at the Volvo factory and has led to more robust construction of the injection pumps and a new design of nozzle. The diameters of the pump plungers have been increased and modified shapes have been adopted for the pump cams.
Roller bearings, carried in steel bushes in the pump housings, are used to support the camshafts. Previously ball bearings were employed. The result of this work is that the increased speed of injection gives •better atomization.
PLASTICS-BODIED DAIRY VEHICLE A DELIVERY vehicle with •a body made of plastics is to be introduced by Austin Crompton Parkinson Electric Vehicles, Ltd., at the Dairy. Show to be held at Olympia, London, from October. 25-29.
At last year's Show the company displayed a vehicle with a plastics cab. The new model represents an extension of the use of this material for the whole bodywork. This will be based on an EH.20 chassis and have a platform to carry a 1-ton load of crates.
A deep windscreen will be fitted to the exhibit. This allows the driver to see the ground 3 ft. ahead of the vehicle.
FORD'S EXTEND HYDROVAC BRAKING
CHANGES to the braking systems of Thames Trader 5-ton goods chassis have been effected by the Ford Motor Co.. Ltd. Hydrovac suspended-vacuum servos are now fitted, complete with a new type of master cylinder, whilst the widths of the front and rear brake linings have been increased from 2.5 in. and 3.5 in. to 3 in. and 4.25 in. respectively. The Hydrovac unit employed is similar to that announced for Trader 7-tonners in The Commercial Motor dated July 15.
LEFT-FOOT BRAKING QUICKER VINDINGS by the University of Illinois have shown that a driver's left foot reacts up to 50 per cent, faster than his right. As a result of this conclusion, South Suburban Safe Way Lines, a Chicago bus company, has developed a dual brake system whereby the brakes are operated by a double pedal which has a treadle on each side of the steering column.
The two pedals are linked by a piece of angle iron, and the installation is such that the driver can use either foot to apply his brakes, or both feet in the case of the " panic " stop. Drivers arc reported to like the new layout and the management of the bus company says that it has helped to prevent accidents.
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