Taking the green line - environmentally optimised Scania trucks
With the aid of its modular product system and pioneering work to reduce the environmental load from its vehicles throughout their lifecycle, Scania can now offer ‘green’ alternatives for almost any type of transport.
Distribution and other urban operations are evident candidates for environmentally optimised trucks. Urban truck work includes building and construction work, which takes place in as sensitive areas as the distribution work.
Low-emission engines are the first step. They have significantly lower emissions of NOx and HC without sacrificing fuel economy. Available in six outputs from 230 to 420 hp, they are applicable for any type of haulage.
Optimising the truck for fuel consumption is the next step. Lower weight always means better fuel consumption per tonne transported. Why not consider a day cab instead of a sleeper, aluminium instead of steel wheel rims, 8 gears instead of 12, an 11.5-tonne axle instead of a 13-tonner, medium instead of luxury seats, etc. All this saves weight and fuel, and thus reduces the environmental impact.
Typical environmentally-optimised trucks
P94 with 230 or 260 hp low-emission engine, Opticruise. Available with particulate trap.
P94 with 260 hp low-emission engine, Opticruise. Available with particulate trap.
Heavy urban construction
P114 with 340 or 380 hp low-emission engine, Opticruise.
P114 with 340 hp low-emission engine, Opticruise.
R94 with 300 hp low-emission engine, Opticruise. Available with particulate trap.
R114 with 380 hp low-emission engine, Opticruise.
R124 with 420 hp low-emission engine, Opticruise.
Air management is more important the higher the speed. Air deflectors should be used if there is a gap between the truck cab and the bodywork or semi-trailer. It is important for the air deflectors to be properly adjusted. Sideskirts on the chassis also contribute to lower air drag, as well as to reduce spray from the vehicle onto other road users on damp surfaces. Decorations, auxiliary lights, etc. that protrude or disturb air flow should be avoided. Powerful air horns, for example, are available mounted under the bumper where they are just as audible as on the roof.
Relaxed driving promotes safety and economy. The best way of reducing stress for the driver is to fit Opticruise, Scania's automated gearchanging system that makes the most out of the truck whatever the circumstances or the condition of the driver. It does so day and night, week after week, year after year. Its driving style is safe and relaxed. It is also kind on the powertrain, enhancing the service life of parts and components, thus reducing the need for repairs and waste material.
Tyres have varying roll resistance and thus different consumption characteristics. A harder, easier-rolling rubber mix is desirable to minimise consumption. This also reduces tyre wear, with additional savings in the consumption of raw materials and reduced pollution from rubber dust. Such tyres may provide slightly inferior friction for emergency stops, however. Using correct tyre pressures at all time further promotes operating economy.
The ultimate step for city driving is a catalytic regenerating trap (CRT), which can now be fitted to 9-litre engines. The CRT will reduce emissions of HC, CO and particulates significantly without any significant operational drawbacks. It does, however, require low-sulphur diesel fuel to maintain its efficiency. This equipment is now available ex-factory.
Greasing the vehicle via conventional grease nipples is better from an environmental point of view than automatic chassis lubrication. An automatic system always leaks some grease onto the road, whereas manual greasing gives the right amount of grease. Overall grease consumption is markedly lower with manual greasing.
Fifth wheels are now available with silicon-coated wear surfaces that require no greasing at all. This of course further reduces grease consumption.
The truck should be maintained according to schedule to maintain safety and performance standards, including emissions. According to schedule, but no more, no less. This is essential to preserve as much material as possible. Some trucks are ‘over-maintained’ to be ‘on the safe side’, but this only causes additional environmental impact.
Consider the axle configuration. 6x2 may be possible instead of 6x4 (or even 4x2 depending on the expected gross weight) to reduce weight and wear.