Non-road fuel consumption and pollutant emissions ... - BAFU - CH

Non-road fuel consumption and pollutant emissions FOEN 2008 46
6 > Inventories and operating hours
of the individual machine categories
6.1 Construction machinery
The division of construction machines into sub-categories is largely based on the
classification system used by CORINAIR. The figures concerning the inventory and
operating hours have been estimated by specialists in the workgroup using the data in
the database of the Swiss Federal Vehicle Inspection Office and with the aid of an
adjustment factor for non-registered machines. There are no official statistics other
than those in the above database. The division by engine-power classes was carried out
on the basis of available data, together with information provided by the manufacturers
and the Swiss Association of Master Builders (SBV). The estimate of specific operating
hours for individual machines was based on available literature (SBV 1999, IFEU
2004), building and population statistics for Switzerland (FSO 2002) and experience of
specialists in the workgroup. Here, assumptions were made regarding the higher or
lower degree of utilisation of construction machines, depending on the market situation.
Inventory
Figure 21 shows the inventory of construction machines by machine type (top left: only
types with an inventory > 1000 machines) and engine-power class (top right). The largest
group is stampers/vibrators (10,500 17 ), followed by compressors (8080) and
hydraulic excavators (8000). Three-quarters of construction machines are operated
with diesel engines, while it is only stampers/vibrators and emergency power generators
that primarily use petrol engines. In terms of engine power, the distribution of
construction machines is fairly even among all engine-power classes up to 300 kW.
Operating hours and their chronological development from 1980 to 2020
The development of operating hours of construction machines by engine-power class
and engine type is depicted in the lower half of Figure 21. Here the assumption is that,
following a sharp increase in operating hours between 1980 and 1995, a slight decline
in activity is to be expected in the next few years. At the same time, a shift takes place
from small (petrol-powered) appliances to large diesel machines and in the direction of
a rationalisation effect, i.e. the specific operating hours per machine increase (not
apparent from the lower half of Fig. 21).
17
10,500 = 5650+1850+3000 (2-stroke and 4-stroke petrol plus diesel)