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Page 20
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Cummins gets ready to power the heavy mob
The ISBe receives a boost to 320hp to help it power Dafs LF range.
Cummins is developing a bigger, upgraded version of its six-cylinder ISBe turbo-diesel. Capacity is up from 5.9 to 6.7 litres, helping to boost maximum power from 275 to some 320hp. A European variant is expected to follow, replacing the ISBe produced at the company's Darlington plant. It will power the heavier models in Des LF range.
firm's European Engine Alliance (EEA) partners from the Fiat Group, Iveco and New Holland.
Two years ago, the EEA produced a longer-stroke off-road ISB/Tector with a capacity close to that of the engine now under development. But it lacked the required torque, flexibility and durability.
Cummins' decision to uprate the six-pot ISBe engine is believed to have been inspired by the current engine's loss of competitiveness in the middleweight truck sector, in terms of price and power. In Europe, the ISBe engines sales prospects have come under pressure from Iveco, which is offering ultra-competitive deals on its EEA Tector range for Dennis Eagle and numerous bus builders.
Meanwhile, Dafs heavier ISBe-powered LF models have been outperformed by other mid-range engines such as Mercedes' 6.4-litre and now 7.2-litre 900 Series: MAN's 6.9-litre D08; and the 7.2-litre Deutz unit soon to be fitted in Volvo and Renault middle weights. A 320hp ISBe engine will also open up the possibility of a 26-tonne LF six-wheeler.
The 6.7-litre unit is likely to be a little heavier though no bulkier than current ISB/ISBe units, but with some 16% more power and correspondingly greater torque. It will supersede Cummins' 8.3-litre ISOISCe engine in many applications, including three-axled refuse collectors, offering a 200kg weight loss.
Cummins recently lost out at Iveco subsidiary Seddon Atkinson over the use of its engines in Seddon trucks. Thanks to on-going product integration between Seddon Atkinson and Iveco, the Italian firm said it was likely to end the use of Cummins engines in Seddon chassis by 2006. Instead, Euro-4 units will be powered by Iveco's own range ofTector and Cursor engines. •