Isuzu’s clean bill of health
The expanded lineup is the latest in hi-tech, writes James Stanford
CLEANER engines and six fresh models have been added to the Isuzu range. Isuzu Trucks Australia has introduced models that meet the ADR 80/ 03 emission standards that come into effect next year.
They are the cleanest Isuzu trucks ever made and also pass the Euro5 emission standard.
Isuzu has used the new engines to bring in new N and F series models to expand its line-up.
Some Isuzu trucks already meet next year’s emission standards, with the brand introducing Euro 5-rated FX and Giga models in late 2008.
The N and F series models will continue to run a diesel particulate filter (DPF) which Isuzu calls a diesel particulate diffuser (DPD), but adopt a range of revisions to further reduce emissions.
The engines run higher pressure injectors, a fuel cooler and primary fuel filter (in most models), improved exhaust gas recirculation (EGR) coolers and the engine mapping has also been changed.
The special EGR coolers are designed to lower the temperature of the exhaust in order to inhibit the formation NOx.
Isuzu says its experience with its particulate filter system, which collects soot and burns it off at superhigh temperatures at regular inter- vals, will give it an advantage over other manufacturers who are only now introducing the technology unless they are using selective catalytic reduction (SCR) which is used more for larger trucks.
‘‘ Isuzu has more than three years’ experience in fine tuning its DPD technology to meet the demands of the Australian market and unique Australian climatic and driving conditions,’’ says Isuzu product planning and engineering support manager Colin White.
‘‘Our product is very well sorted and it’s a relatively straightforward undertaking for N and F Series models to make the transition to Euro V.
‘‘ Many of our competitors’ trucks, on the other hand, will not only require the adoption of new technology, but also the associated servicing infrastructure and education processes to properly service these trucks both at a company and at a dealership level.’’
The company has certainly had some teething problems with the filters, which it says it has resolved, and expects other brands to have similar issues.
Three models have been added to the N series light-duty lineup. There is now a Medium Crew variant of the NLS 200 model with a 3360 mm wheelbase, 620 mm longer than standard, which has three rear seats that takes the seat count up to six.
Isuzu has also added a tipper version of the NLS 200, which has a wheelbase of 2740 mm and a gross vehicle mass (GVM) of 4500kg.
The third new N series truck is the NLR 275 tipper, which has a GVM of 5500kg.
The NPR 250/ 300/ 400 and NQR 450 models now have taper-leaf front springs instead of multi-leaf springs, which Isuzu says means 30 per cent more load capacity and a smoother ride.
A passenger airbag has been added as standard equipment across the N series range, as have electric windows and keyless entry.
Though the engines are now cleaner, the power and torque outputs have not changed.
The entry level engine is a 3.0-litre four-cylinder that generates 110kW and 375Nm and is available in the NLR and NNR models.
A 5.2-litre four-cylinder that generates 114kW and 419Nm is used for NPR and NPS versions.
The most potent engine in the N series is the 5.2-litre four-cylinder tuned for 139k W and 510 Nm and used in the NQR 450.
Three new models have been added to the F series line-up, which is Isuzu’s medium-duty range.
There is now an FSR X-Long model which has a wheelbase of 6500 mm, up 940 mm on the existing FSR Long version.
Another new model is the single cab version of the FTR 900 Medium-Long and an automatic version of the FVR 1000.
The base F series truck, the FRR 500, runs a 5.2-litre four-cylinder with 154 kW and 637 Nm. The FFR 600, FSR and FTS have a 7.8-litre six-cylinder with 176kW and 706 Nm. FTR and FRR and FSR high output models use the 7.8-litre engine with a more aggressive tune that generates 191kW and 761 Nm.
The range-topping F series engine, also the same size, produces 221kW and 980Nm and is used in FVD, select FVR models, as well as the FVY, FVZ, FVL and FVM.
The heavy-duty FX and Giga models have also been upgraded with cleaner-burning Euro5 engines which use a Diesel Oxidation Catalyst after-treatment.
Isuzu’s compressed natural gas models, which were introduced early this year, will continue unchanged as they are already clean.
Engines set to go: trucks in the new Isuzu range have up-to-date clean-air technology.