Abstract: Safety device and safety procedure in the case of a tipping dump body (2) of a truck (1), in which the dump body (2) through the operation of a control (11) in the driver's cab (4) of the vehicle (1) and by means of at least one hydraulic or pneumatic lifting cylinder (5) is designed to be moved between a lowered transport position (6) and a raised tipping position (7), and to assume a floating position, in which the lifting cylinder (5) is not pressurized and a holding position in which the lifting cylinder (5) is pressurized and the position of the dump body (2) is locked. The device includes a detector (13) that is designed for detection of the driver's presence in, or absence from the driver's cab (4), and that either a presence signal or an absence signal is delivered to the control (11) depending on whether or not the driver is in the driver's cab. The control (11) is designed, in the event of an absence signal from the detector (13), to assume the holding position.

Abstract: Method and apparatus for activation of an emergency brake function (8; 8′) within a vehicle (1) in dependence of whether a regular brake function. The method and apparatus include a first brake circuit and a second brake circuit that are out of order. A first sensor (20; 20′) is included for detecting whether the pressure (p1) in the first brake circuit falls below a first limit value (p1G). A second sensor is included (21; 21′) for detecting whether the pressure (p2) in the second brake circuit falls below a second limit value (p2G). A means is also provided (16; 24, 25, 26) for activation of said emergency brake function if the pressure (p1) in the first brake circuit falls below the first limit value (p1G) at the same time as the pressure (p2) in the second brake circuit falls below the second limit value (p2G). An activation process for an emergency brake function is provided regarding the method.

Abstract: Method and device for the determining a maximum allowed velocity (Vmax) for a vehicle (1) when going downhill (2). The invention includes a detector (11) for detection of current inclination (alpha) of the vehicle (1) in relation to a horizontal plane (3), and means (10) for the determination of a value relating to the maximum allowed velocity (Vmax) of the vehicle in dependence of at least the value of the inclination (alpha). The invention also relates to a procedure for the control of the velocity. The invention provides a procedure for velocity control that takes the inclination into account when going downhill.