Scania: more power
Page 18
If you've noticed an error in this article please click here to report it so we can fix it.
SCAN1A has developed two new 8.5-litre six-cylinder diesel engines for use in its new 92Series truck range, for operation from 16 to 38 tonnes gvw, and in the K92 bus chassis (see p18).
These units are designated DS9 in turbocharged form and DSC9 with air to air intercooling. Both offer high power, high torque and better fuel consumption performance than is currently available with the 7.8litre DS8 power unit employed in the 82 model range.
Rated at 180kW (245bhp) the DS9 delivers an increase of 25kW (34bhp) at a reduced maximum engine speed of 2,200rpm; this is accompanied by a maximum torque output of 977Nm (735 lbft) at 1,200rpm. With an intercooler power is further increased by 12 per cent for the DSC9 unit giving an output of 202kW (275bhp) at 2,200rpm and torque of 1097Nm (809 lbft) at 1,200rpm.
In providing power options not previously available to Scania operators, the manufacturer expects they will appeal to some currently operating 82 or 112 models.
The 92-Series will be available in 4x2, 6x2, 6x4 and 8x4 axle configuration. G and P type cabs for the UK have improved heating, ventilation and trim.
The new engines are easily identified as the only Scania power units to employ individual cylinder heads. Each gas ket incorporates vulcanised rubber seals. Short, rigid valve mechanism is achieved in conjunction with a seven-bearing camshaft. Adjustment for the valve lifters is conveniently placed behind side-inspection plates on the block.
Continuous oil supply to the valve rocker arms is fed through a gallery in the camshaft which in turn is lubricated and cooled via a main oil passage.
The lubricating system employs a patented Scania cyclone and centrifugal oil cleaner with an extra filter protecting the turbocharger.
A new feature is a main valve which automatically shuts down the flow of cooling oil to the piston crowns at idling speeds and opens when the pressure rises, with an increase in speed, to 3 bar (43.5psi).
The new Bosch 7100 pump, developed to give a greater injection pressure, matched by short, equal-length pipes, is mounted high on the cool side of the engine block. Small diameter five-hole injection nozzles located close to the centre of combustion aid a more efficient burn. The fuel system can be bled at the twin fuel filters mounted high up in an easily accessible position.
The coolant system provides for the inclusion of an electric engine block heater and a filter is fitted as standard. The pump, integrated with a full-flow oil cooler, is driven from the crankshaft pulley at the front of the engine.
A third groove allows for an engine powered power take-off unit. A specially adapted timing cover provides for a direct pt-o drive with a maximum output of 33kW (45bhp), but for the UK pto drives will probably be taken from the vehicle's gearbox.
The 8.5-litre engine is 50mm (2in) longer and consequently slightly heavier than the 7.8-litre units, but uses common engine mounts with other Scania engines.
Production of the 92-Series will begin in January 1985 and become available in the UK from February. The debut will be at Paris early next month and it will also be seen on the Scania stand at the Motor Show next month. For Britain, the new range will be built in Holland.