Abstract: A mass value is determined which represents the mass of a vehicle. The vehicle includes a drive unit and a clutch unit. By the disengagement of the clutch unit, the force flow between the drive unit and the vehicle wheels can be essentially interrupted. At least a first acceleration value is detected which represents the vehicle acceleration at a first time point. Furthermore, at least a first drive value is detected which represents the drive force or the drive torque of the drive unit at the first time point. At least a second acceleration value is detected which represents the vehicle acceleration at a second time point whereat the clutch unit is disengaged. A comparison then takes place of the detected second acceleration value with at least one pregivable threshold value. The determination of the mass value takes place at least in dependence upon the comparison and at least in dependence upon the detected first acceleration value and the detected first drive value.

Abstract: The invention is directed to a transmitted-light illuminating arrangement having a condenser including one or two lenses. A glass sphere is selected as the front lens for the condenser. The illuminating arrangement permits Kohler illuminating conditions to be set and yet has a simple configuration which can be economically produced.

Abstract: In a pressure sensor for detecting the air pressure in the interior of tubeless tires of motor vehicles, on a rim having two edge beads extending around its outside and a drum-like base, to facilitate mounting and provide malfunction-free, exact detection of pressure it is provided that the pressure sensor (10) is disposed in a bore (9) of the preferably radially inner section (5) of a bead (3), and in particular the longitudinal axis (43) of the pressure sensor (10) forms an acute angle with the axis (44) of the rim.