Abstract: A method of laying a finishing layer with a road finisher F having a screed B, whereby the screed, equipped with a tamper device T and a smoothing plate, at least compacts and superficially smoothes the finishing layer, and the stroke and/or the frequency of the tamper device T are remotely varied for laying a finishing layer with a paving thickness and/or laying rate V which vary over the pave width and transversely to the working direction R within the pave width. A road finisher having a screed suitable for implementing the method set forth above wherein the road finisher or screed has an adjustment device for the remotely actuated local variation of at least the stroke of the tamper device within the pave width.

Abstract: A system for applying a road surface includes a plurality of operational components each with one or a plurality of adjustment parameters and an open loop control unit from which the adjustment parameters are communicated to the operational components. The system has a closed-loop control unit for determining the optimum adjustment parameters for obtaining at least one specified target value taking into account measurement quantities, for producing a command data set representing a plurality of optimum adjustment parameters and for communicating this command data set to the open loop control unit. The invention also relates to a method for controlling a system for the application of a road surface, in particular a road finisher.

Abstract: A method for controlling the process laying a layer in a selectable paving thickness with a road finisher in which the laying process is automatically controlled in that a target value for the paving thickness is entered into an automatic closed-loop control system and communicates the actuating signals to such members and the signals. A road finisher has a computerized, either fully automatic or operator aided closed-loop control system for the direct control of the laying process with control of the paving thickness to a predetermined target value and for the optimization of the operating point of the pre-compaction system, which is connected to sensors at least for the acquisition of the setting angle of the screed, of the paving thickness and of the laying rate.

Abstract: In the hydrostatic working operation of a road finishing machine or a feeder which comprises a primary power plant with an internal combustion engine (M) and several hydraulic variable displacement pumps, which are hydraulically connected to hydraulic motors of working components, and which possesses a computerized control device, the internal combustion engine is operated within its engine-specific characteristic map in response to the load condition by dynamic speed adaptation in a characteristic zone with optimal consumption, and the displacements (VsHP) of the variable displacement pumps are simultaneously automatically adapted for keeping the volume flow rates for the hydraulic motors constant.

Abstract: In a tamper of a screed having an eccentric shaft comprising an eccentric section and an eccentric bushing arranged thereon which is rotatably mounted in a connecting rod driving a tamper bar, the stroke of the tamper bar is adjustable by a relative rotation between the eccentric shaft and the eccentric bushing, and a tappet and a preselection area with two tappet stop positions defining two different tamper bar strokes are functionally provided between the eccentric shaft and the eccentric bushing, so that the tappet can be adjusted without tools to each tappet stop position by a reversal of the direction of rotation of the eccentric shaft to switch between the two strokes.

Abstract: In a method for laying down a pavement consisting of paving material with a screed of a road paver, in which a compaction unit, particularly a tamper, pre-compacts the paving material at cyclical work cycles with selectable stroke and selectable frequency while the pavement having a selectable pavement thickness) is in the process of being laid down at a selectable paving speed, at least the stroke is automatically adjustable in response to paving parameters, such as at least the paving speed and/or the pavement thickness, along a characteristic curve or in a characteristic map. In the screed the compaction unit comprises an adjusting mechanism which is operable during the ongoing paving work for adjusting the stroke of the compaction unit.

Abstract: In a screed with a basic screed and at least one extendable screed movable relative to the basic screed with a hydraulic cylinder and an electro-hydraulic control comprising a magnet-actuated directional control valve for at least controlling the direction of the hydraulic cylinder, the directional control valve for changing the rate of motion of the hydraulic cylinder is guided by an operator or automatically and is a proportional directional control valve (W) with proportional-electric direct actuation or proportional-electric-hydraulic pilot control. The proportional directional control valve for the hydraulic cylinder is connected on the actuation side with an electro-hydraulic control of a hydraulic system of the road finishing machine.

Abstract: In a belt conveyor device with a continuous conveyor belt which is replaceably carried in a conveying duct by inner drive and tail pulleys which are installed in a frame structure defining the conveying duct, at least the drive and the tail pulley can be moved to a replacement position by means of adjusting means integrated in the frame structure, in which position the respective pulley or at least one pulley end is placed outside the conveying duct for conveyor belt replacement, or parts of the frame structure that interfere with the mounting of the conveyor belt can be removed by folding them away, dismounting them, or the like.

Abstract: In a self-propelled machine F for processing paving material, the machine having a liquid cooled combustion engine M and at least one hydraulic circuit H containing hydraulic pumps 6, hydromotors or hydrostatic drive units 7-10 and at least one hydraulic medium reservoir 12, a fan assisted cooling device K including cooling regions 1b, 1c at least for the cooling liquid of the combustion engine M and of the hydraulic medium of the hydraulic circuit H. A hydraulic medium operation temperature setting and regulating device R is provided for the hydraulic medium cooling region 1c constituted by a separate cooler 24 in order to generate an operation temperature T of the hydraulic medium above at least about 60° C. and to maintain this operation temperature depending on the hydraulic load situation in the hydraulic liquid H and on the surrounding climate, independently from a cooling regulating system S for the combustion engine M.

Abstract: The invention relates to a self-propelling machine for processing bituminous or concrete pavement material, in particular a road finisher or a feeder. The machine comprises an internal combustion engine as a primary drive source, a controller for the engine, said controller receiving control signals, at least one additional drive unit for functional and operational components of the machine as well as at least one hydraulic circuit comprising a hydraulic medium reservoir. The invention is characterized in that the controller is configured for automatically causing starting and/or stopping of the engine in response to receipt of at least one specific control signal.

Abstract: At least two paving screeds B1, B2 which are distant in operation running direction R are supported at a chassis 1 of a paver F. The paver F is designed for simultaneously casting several paving material layers L1, L2 on top of each other on a plane P. Each paving screed B1, B2 is provided with a compaction assembly. One paving screed B1 for casting a lower layer L1 is provided at a front end section of the chassis 1 and has the compaction assembly 13, 14 for generating a degree of compaction in the lower layer L1 which suffices to withstand the direct contact of the undercarriage 2. At least one further paving screed B2 for casting an upper layer L2 is arranged behind the undercarriage 2. According to the method to be carried out with the paver F the lower layer which is cast and compacted in front of the undercarriage allows to run the undercarriage 2 on the lower layer while the upper layer L2 is cast and compacted behind the undercarriage 2.

Abstract: An electronic control device on a road paver includes an operator's console and a host system unit which is connected via a bus system to electronic subsystems, and which has an inputting and indicating section and a storage area for adjusted machine parameter-data, which machine parameter-data are set and stored at least in the host system unit for the parameterization of the road paver, whereby at least one data exchange port is provided which is connected to the host system unit and which is bi-directional. A mobile data memory device is detachably attached to the data exchange port for storing and safeguarding at least the machine parameter-data, which are set in the host system unit in redundant fashion.

Abstract: A method for installing user software in a host system unit (Z) of an electronic control system of a construction machine, in particular of a road paver (F), the user software and, in addition, in some cases, parameter-base data, completely stored in an external removable storage medium (W) which is designed to be suitable for the coarse conditions in a construction machine. The removable storage medium (W) is attached to a data exchange port (12), which is connected to the host system unit (Z). The user software and, in some cases, the parameter-base data, are transmitted during a start of the system or when attaching the removable storage medium (W) into the host system unit (Z) for installation purposes or for updating purposes. The construction machine is characterized in that a data exchange port (12) is provided at, or within, an operator's console (B), which data exchange port (12) is connected to the host system unit (Z).

Abstract: A control panel K for the control device of a construction machine, particularly of a road paver or a feeder, comprises in an operation console housing 1, 1? at least one group consisting of different electronic command signalling devices 5 to 11 which are separated among replaceably provided logic service units E1 to E8.

Abstract: At least two paving screeds B1, B2 which are distant in operation running direction R are supported at a chassis 1 of a paver F. The paver F is designed for simultaneously casting several paving material layers L1, L2 on top of each other on a plane P. Each paving screed B1, B2 is provided with a compaction assembly. One paving screed B1 for casting a lower layer L1 is provided at a front end section of the chassis 1 and has the compaction assembly 13, 14 for generating a degree of compaction in the lower layer L1 which suffices to withstand the direct contact of the undercarriage 2. At least one further paving screed B2 for casting an upper layer L2 is arranged behind the undercarriage 2. According to the method to be carried out with the paver F the lower layer which is cast and compacted in front of the undercarriage allows to run the undercarriage 2 on the lower layer while the upper layer L2 is cast and compacted behind the undercarriage 2.

Abstract: An electric heating unit for a road finisher for heating work components having at least one heating rod (1, 10) with a predetermined nominal heating power. In order to increase the reliability of operation of the heating unit and in order to facilitate heating unit repairs that have become necessary in view of a faulty heating rod (1, 10), each heating rod (1, 10) is provided with at least two heating spirals (3, 4; 12, 13, 14) each provided with an electric lead (6, 7; 16, 17, 18) of its own, both of the leads being connected to a user-accessible connection means (8).