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I Cummins
; well as collaborating with Daf id iveco in the development of w engines, Cummins has been eping busy with a range of six wn-brand" Euro-3 power units ivering 20 ratings from 135Shp. The settings for the new e-up were optimised at immins' European Technical mrations Centre at Darlington, 'ere many of the engines will I produced.
From the smallest ISBe up to
range-topping ISXe, a numir of features are common to . These include four valves per tinder, Holset wastegated turchargers and air-to-air arge-coolers taking care of a flows, with Cummin's :eract electronic engine manement ensuring that everyErg happens at the right time.
All external ancillaries are driven by a single auto-tensioned polyvon belt at the front of the block.
The baby of the range, the ISBe replacing the B-Series, comes in two versions: a 3.9Iit four-pot intended for the 7.5-12tonne sector and a 5.91it six for operations up to 25 tonnes. Small it may be, but it has a grown-up specification, with a Bosch high-pressure commonrail system delivering the fuel through centrally located injectors, and low-pressure prerjection helping to keep noise down. The fuel pump and camshaft are gear-driven from the rear of the engine.
Next up is the 8.3-litre ISCe which, logically enough, is an evolution of the C-Series. Designed for specialist applications such as fire appliances, refuse collectors and concrete mixers, it has a similar layout to the ISBe but boasts home-grown CAPS (Cummins Accumulator Pump System) common-rail technology
Cruise control
The electronics can provide integral cruise control, speed limiting and PTO control functions.
Also utilising CAPS, the ISL, has a displacement of 9.01it and is designed to provide a respectable power-to-weight ratio for payload-critical applications. Jacobs C Brake is an Option on both the ISL, and the
11-litre ISM' which occupies the next slot in the range. ISMe combines Cummins' own unit injection system and a Holset turbocharger with a four-position wastegate; it's ready to work all the way up to 44 tonnes.
As well as four fixed power ratings, the ISMe is available with ESP (Electronic Smart Power). This is a dual-rated system which runs at an economical 345hp when it senses light running conditions, but converts to 420hp when the going gets tough.
And when it's really, really tough, there's always the ISXe, with power options up to a storming 615hp. It features the HPI (High Pressure Injection) system developed in collaboration with Scania and fitted to its new 470 engine (CM22-28 Feb). The injectors are pressurised up to 1,930 bar by one of the two overhead cam-shafts; the other operating the valves and the Intebrake compression brake which matches the ISXe's power output with 615hp of retardation. Cummins says it's the most powerful truck diesel engine brake ever; we won't argue.
Other notable features of the ISXe are electronically controlled exhaust gas recirculation (EU) and a variable geometry turbocharger with titanium compressor blades. The engine has an unusually clean design, with many hoses and fittings