the cylinders 5 a 5 b 6 7 a and 7 b schematically illustrated in fig2 correspond the cylinders 5 a 5 b 6 7 a and 7 b shown in fig1 fig3 is a schematic illustration of i a a transmission line 110 of a wheel loader 1 according to an embodiment of the present invention the internal combustion engine 120 of the wheel loader 1 is arranged at one end of the transmission line 110 whereas the driving wheels 130 of the wheel loader 1 are arranged at the other end of the transmission line 110 it follows that the internal combustion engine 120 is arranged to supply torque to the driving wheels 130 of the wheel loader 1 via the transmission line 110 it is preferred that the transmission line 110 comprises a gearbox 118 for varying the speed of the driving wheels 130 of the wheel loader 1 and for changing between forward and backward driving direction of the wheels 130 the gearbox 118 may e g be an automatic gearbox implying that there must not necessarily be a clutch not shown between the gearbox 118 and the driving wheels 130 which is common in the case of a manual gearbox as discussed above in the background to the present invention the transmission line 110 of a wheel loader is usually provided with a transmission unit 114 for reducing the mechanical interaction between the internal combustion engine 120 and the driving wheels 130.