Stuttgart opts for nat­u­ral gas trucks

The Witness - Wheels - - TRANSPORT -

SEVEN Mercedes-Benz Econic NGT (Nat­u­ral Gas Tech­nol­ogy) mod­els with an en­vi­ron­men­tally friendly nat­u­ral-gas drive sys­tem and ex­ten­sive safety fea­tures are set to take over waste col­lec­tion and dis­posal du­ties in the city of Stuttgart, the re­gional cap­i­tal of Baden-Würt­tem­berg.

In Jo­han­nes­bug, 50 buses with the same fuel sources are al­ready op­er­at­ing.

Peter Bauer, head of prod­uct man­age­ment Econic, Mercedes-Benz Spe­cial Trucks unit, handed over the seven Econic mod­els to Dr Thomas Hess, CEO of the lo­cal author­ity owned en­ter­prise AWS Ab­fall­wirtschaft Stuttgart, and Dirk Thür­nau, tech­ni­cal mayor of Stuttgart, on Fe­bru­ary 23.

“The pur­chase of the lat­est gen­er­a­tion of the Mercedes-Benz Econic NGT is of par­tic­u­lar im­por­tance for Mercedes-Benz Trucks. The re­gional ties to Stuttgart play just as big a role as AWS’s long and in­ten­sive re­la­tion­ship with Mercedes-Benz prod­ucts,” said Dr Ralf Forcher, head of mar­ket­ing, sales and ser­vices MercedesBenz Spe­cial Trucks.

Since the mar­ket launch of the Econic in 1998, the re­gional cap­i­tal has pur­sued an on­go­ing pol­icy of pur­chas­ing Econic ve­hi­cles to re­place its con­ven­tional waste dis­posal ve­hi­cles and AWS Stuttgart has been in­volved with the Econic and Econic NGT from the out­set as a devel­op­ment part­ner.

Econic prod­uct man­ager Peter Bauer said that this for­ward-think­ing in­vest­ment will make an im­por­tant con­tri­bu­tion to­wards en­sur­ing a pos­i­tive en­vi­ron­men­tal track record. The key rea­son be­hind this lies in the in­no­va­tive drive tech­nol­ogy with eco­nom­i­cal fuel con­sump­tion com­bined with very low CO² and noise emis­sions.

“AWS is tak­ing on the is­sue of fine dust emis­sions in Stuttgart,” said Hess.

With their 3 900 mm wheel­base, AWS Stuttgart’s new, full air-sus­pen­sion Econic NGT waste col­lec­tion ve­hi­cles are ex­tremely ag­ile.

This is an im­por­tant ad­van­tage when it comes to ur­ban traf­fic in Stuttgart’s city cen­tre. They have a per­mis­si­ble GVW of 26 t, which is iden­ti­cal to the diesel vari­ant of the Econic.

The Econic ve­hi­cles with nat­u­ral-gas en­gines boast very low ni­tro­gen ox­ide, par­tic­u­late and noise emis­sions. The pass-by noise emis­sions of the Econic mea­sured in Stuttgart at 78 dBA are au­di­bly lower than those of a Euro VI diesel en­gine, which have been mea­sured at 80 dBA. The tank holds up to 600 litres of nat­u­ral gas, al­low­ing high ranges for daily waste col­lec­tion op­er­a­tions.

For the first time, the seven new Econic NGT mod­els in Stuttgart fea­ture the new Euro VI M 936 G nat­u­ral-gas en­gine with a dis­place­ment of 7,7 l and a pow­er­ful out­put of 222 kW (302 hp). The con­fig­u­ra­tion of the fuel-ef­fi­cient BlueTec in-line six-cylin­der en­gine is, in many re­spects, iden­ti­cal to that of a con­ven­tional diesel en­gine. How­ever, the nat­u­ral-gas en­gine in the Econic NGT burns a pre­pared mix­ture of nat­u­ral gas and air rather than a diesel/air mix.

Be­cause com­bus­tion of the al­ter­na­tive fuel nat­u­ral gas by the mono­va­lent Econic nat­u­ral gas en­gine pro­duces vir­tu­ally no par­tic­u­late or fine-dust emis­sions, com­pli­ance with Euro VI limit val­ues can be achieved with­out the need for SCR tech­nol­ogy with AdBlue, post-in­jec­tion pro­cesses and par­tic­u­late fil­ters for ex­haust gas clean­ing.

The CO² emis­sions mea­sured are around 23% lower than those of a Euro VI diesel en­gine, and where bio­gas is used, it is pos­si­ble to re­duce CO² lev­els even fur­ther.

“De­spite the higher cost of pur­chas­ing a nat­u­ral-gas pow­ered waste col­lec­tion ve­hi­cle, the sav­ing on fuel bills that can be achieved with a com­plete switch from diesel to nat­u­ral gas is go­ing to off­set our ad­di­tional costs af­ter around three and a half years,” said Hess.

Fit­ting an Eco pack­age lim­its the ve­hi­cle speed to 85 km/h.

PHOTO: SUP­PLIED

Seven Mercedes-Benz Econic NGT mod­els with an en­vi­ron­men­tally friendly nat­u­ral-gas drive sys­tem are set to take over waste col­lec­tion and dis­posal du­ties in the city of Stuttgart, Ger­many.

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