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Contractors World 2011 Volume 2 Issue 5
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Manufacturers innovate as the benefits of new technology and environmental considerations are more and more in demand from customers.In addition, there are the enforced reductions in emissions enforced through regulation.

This has created a race to develop cost efficient hybrid solution such as demonstrated by Komatsu and also greater use of batter powered or even mains powered equipment - see article on Liebherr plug-in excavator.

Dynapac is currently evaluating the world first 'emission free' - battery driven roller, the conceptual model CC900E asphalt roller. Now the compaction market enters the race with the world’s first battery powered tandem asphalt roller.

Shhhhh . . . vibratory compactor at work!

These are not words one would normally associate with vibratory compactors, but Dynapac is currently evaluating the world first ‘emission free’ - battery driven roller, the conceptual model CC900E asphalt roller.

Is the innovative battery powered vibratory compact from Dynapac the way forward for other equipment?

At this time, Dynapac is saying little about when the model will be available, or the specifications other than that it is a little heavier but otherwise has the same performacne as the CC900.

Such a roller offers many benefits. In addition to being emission free, it is very quiet in operation and yet offers the same compaction performance as its diesel-driven counterpart.

Dynapac say that twin electric drive motors ensure comfortable, smooth travel and, together with electric vibration motors, generate high-quality compaction results. Can the roller deliver on the job site? Dynapac believe so as they say that the electric roller will work for a full day on one charge and can be recharged simply overnight.

Batteries replace the tradition diesel engine. Overnight charge gives sufficient power for the next day.Being very quite (compared to tradition asphalt rollers) and exhaust-free, it can be used in sensitive areas where noise and fumes are not desirable (near hospitals, schools, etc.). It also means that, where regulations allow, it can even be used for indoor tasks. With no engine, servicing is dramatically reduced giving more machine availability and further reducing costs.

Batteries replace the tradition diesel engine. Overnight charge gives sufficient power for the next day.

If the model number is any indication, the electric roller will have an operating weight of around 1,500 kg, a drum width of 600 mm and probably a 70 Hz frequency and 0.4 mm amplitude.

Dynapac has also announced that the CC722 is now compliant with Stage IIIB/Tier4i legislation - the first to meet this demanding specification.Engine upgrade for traditional asphalt roller.

Dynapac has also announced that the CC722 is now compliant with Stage IIIB/Tier4i legislation - the first to meet this demanding specification.

The CC722 is the largest Dynapac asphalt roller and the first Dynapac roller to have the Tier4 i / Stage IIIB engine, using Cummins as the engine supplier. It is powered by a Cummins QSB 6.7 engine with 164 kW/ 220 hp rating. For this power rating the Tier 4i/ stage IIIB was valid from 1:st of January 2011 within EU and North-America.

This particular engine uses the Diesel Particle Filter Technique (DPF) to get the Particulate Matter (PM) down from 0.2 to 0.025 g/kWh which is a substantial decrease in percent (88%). The Tier 4i/ Stage IIIB will also have substantial lower values for nitrogen oxides and hydrocarbons.

With the previous engine the CC722 had an operating weight of 17,985 kg, centrifugal force (high/ low amplitude) 215/102 kN, nominal amplitude (high/ low) 0.7/ 0.4 mm and vibration frequency (high/ low amplitude) of 48/ 48 Hz.

Dynapac

 

 

 

 

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