Isuzu’s clean bill of health

The ex­panded lineup is the lat­est in hi-tech, writes James Stan­ford

Herald Sun - Motoring - - Big Wheels -

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.

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