Dynapac

In 2022, a CA5000D machine owned by Implenia, the main contractor for the Varberg Tunnel construction project, was tested to measure the difference in fuel consumption when the machine was operated in different settings. The machine had been manufactured in 2021 and had 931 hours on the clock. The test results showed a fuel savings of approximately 36%, which was consistent with measurements conducted by Dynapac in Verkö, Karlskrona in February 2022. The Varberg Tunnel is a railway tunnel designed to carry all railway traffic through Varberg underground.

The goal of the measurement was to investigate the difference in fuel consumption when the machine was driven in different modes. The machine was a CA5000D, manufactured in 2021 and had 931 hours on the clock. The machine is currently owned by Implenia, which is the main contractor for the construction of the Varberg tunnel in Sweden, a railway tunnel that will lead all railway traffic through Varberg underground. The machine worked with packing an approx. 0.5 m thick layer of sub-ballast, consisting of material fraction 0/90, crushed on site from the coarser fraction. 2-3 dump trucks tipped material along the railway line, and this was spread by a grader, followed by compaction with a roller.

Measuring equipment which is needed for recording engine data, (CAN J1939), such as engine speed, instantaneous fuel consumption, total fuel consumption, etc. was all installed on the machine. Registration of data then took place over two working days. The driver was asked to drive “as usual”, but with specific instructions to obtain comparable data. The machine was equipped with Dyn@lyzer which was used for packing control, and this was on during the entire measurement period. Once the obtained data is saved, one can see if the driver has driven with the correct amplitude. The total fuel savings in the measurement amounted to approx. 36%, which corresponds very well with the own measurements carried out by Dynapac at Verkö in February 2022.