Abstract: A road paver is provided with a drive, a bunker, a material conveying device, a screed comprising a tamping device and an electric heating device on the screed and/or on the tamping device, wherein a control unit is configured in such a manner that it determines, by means of a measurable electrical operating parameter of the electrical heating device on the screed and/or on the tamping device, the weight and/or the center of gravity and/or the width of the screed transversely to the working direction of the screed. A method for determining a width and/or a weight and/or a center of gravity of a screed of a road paver, comprising the steps: measuring an electrical variable of a heating device, in particular a heating power, a heating resistance or a power consumption of the heating device; calculating the weight and/or the center of gravity and/or the width of the screed transversely to the working direction of the screed by means of the electrical operating variable.

Abstract: The present invention relates to a method for operating a hydraulic system of a self-propelled road paver, in particular, for the supply of hydraulic oil as needed to a closed hydraulic circuit of the road paver, a hydraulic system of a road paver for performing the method and a road paver having such a hydraulic system. The extraction and/or return of the quantity of hydraulic oil occur depending on at least one operating parameter of the road paver.

Abstract: The present invention relates to a road paver with a drive, a bunker, a material conveying device, a screed comprising a tamping device and an electric heating device on the screed and/or on the tamping device, wherein a control unit is provided, which is configured in such a manner that it determines, by means of a measurable electrical operating parameter of the electrical heating device on the screed and/or on the tamping device, the weight and/or the center of gravity and/or the width of the screed transversely to the working direction of the screed.

Abstract: The present invention relates to a device and method for ascertaining the steering angle (?3) of at least one steerable wheel of a set of steerable wheels of a machine that can be directionally controlled, which machine comprises at least said set of steerable wheels and at least one set of drivable wheels showing a specific wheelbase (a1) relative to said steerable wheels and spaced from one another by a specific track width (b1), wherein by means of an ascertained wheel velocity difference of the two driven wheels a yaw rate (?) and a real circle radius (r1) of the driven wheel on the inside of the curve are ascertained. It is then possible to ascertain the steering angle (?) from these values by way of the geometrical relationship of wheelbase (a1) and track width (b1) of the machine.

Abstract: The present invention relates to a method for operating a hydraulic system of a self-propelled road paver, in particular, for the supply of hydraulic oil as needed to a closed hydraulic circuit of the road paver, a hydraulic system of a road paver for performing the method and a road paver having such a hydraulic system. The extraction and/or return of the quantity of hydraulic oil occur depending on at least one operating parameter of the road paver.

Abstract: The invention relates to a self-propelled construction machine, for example, a road finisher, comprising a vehicle chassis and having a tandem axle unit and a single wheel on each side of the vehicle, wherein each tandem axle unit comprises a twin axle carrier and also a regulating device, by means of which the twin axle carrier can be pivoted relatively to the vehicle chassis. Each tandem axle unit is mounted on a lever arm, which is mounted for rotation about a pivot axle on the vehicle chassis, and which is engaged by the regulating device.

Abstract: The present invention relates to a device and method for ascertaining the steering angle (?3) of at least one steerable wheel of a set of steerable wheels of a machine that can be directionally controlled, which machine comprises at least said set of steerable wheels and at least one set of drivable wheels showing a specific wheelbase (a1) relative to said steerable wheels and spaced from one another by a specific track width (b1), wherein by means of an ascertained wheel velocity difference of the two driven wheels a yaw rate (?) and a real circle radius (r1) of the driven wheel on the inside of the curve are ascertained. It is then possible to ascertain the steering angle (?) from these values by way of the geometrical relationship of wheelbase (a1) and track width (b1) of the machine.

Abstract: The invention relates to a self-propelled construction machine, for example, a road finisher, comprising a vehicle chassis and having a tandem axle unit and a single wheel on each side of the vehicle, wherein each tandem axle unit comprises a twin axle carrier and also a regulating device, by means of which the twin axle carrier can be pivoted relatively to the vehicle chassis. Each tandem axle unit is mounted on a lever arm, which is mounted for rotation about a pivot axle on the vehicle chassis, and which is engaged by the regulating device.

Abstract: A road paver for laying road construction material comprises a tamping beam, a bunker for receiving road construction material, a wheeled chassis with a rear axle and a steerable front axle, and a hydraulic arrangement for permanent or optionally selectable drive of hydraulic motors which are coupled to the front wheels. A method for tractive power control and for drive slip limitation of the front drive of a road paver is also disclosed.

Abstract: A road paver for laying road construction material comprises a tamping beam, a bunker for receiving road construction material, a wheeled chassis with a rear axle and a steerable front axle, and a hydraulic arrangement for permanent or optionally selectable drive of hydraulic motors which are coupled to the front wheels. A method for tractive power control and for drive slip limitation of the front drive of a road paver is also disclosed.