A paving machine includes a frame, a drive assembly including a steering mechanism, a hopper, a screed assembly, a material delivery system disposed on the frame and configured to transport a volume of paving material to the screed assembly, and a material feed adjustment system. The material delivery system includes a left conveyor having a left conveyor speed, a right conveyor having a right conveyor speed, a left auger having a left auger speed, and a right auger having a right auger speed. The material feed adjustment system includes a steering input sensor configured to transmit a steering angle of the steering mechanism, and a controller in electronic communication with the steering input sensor. The controller is configured to automatically control the left conveyor speed, the right conveyor speed, the left auger speed and the right auger speed based on the steering angle to maintain the target pile size.

A paving machine for paving a work surface can include a hopper for receiving, accommodating, and dispensing a paving material. The hopper may be movable into various positions including a conventional configuration, a material receiving configuration, and a material feeding configuration. The paving machine may include a hopper regulation system associated with a material quantity sensor and an object detection sensor and that utilizes data obtained therefrom to decide on proceeding with a material receiving operation, a material feeding operation, or to suspend hopper operation.

An asphalt finisher includes a tractor, a hopper disposed in front of the tractor and configured to receive a pavement material, a conveyor configured to convey the pavement material in the hopper to a rear side of the tractor, a screw configured to spread the pavement material conveyed by the conveyor at the rear side of the tractor, a screed configured to compact the pavement material spread by the screw at a rear side of the screw, an information acquisition device configured to obtain information on a road to be paved, and a control device. The control device is configured to support an operation of aligning the center of the tractor with the center of a pavement target area based on the information obtained by the information acquisition device.

An ultrathin bonded asphalt surface (UBAS) system and method for resurfacing paved asphalt surfaces, particularly local, collector and residential streets in residential neighborhoods, including cul-de-sacs and roundabouts. The asphalt surface can be prepared with a milling machine. A spray paver applies emulsion bonding liquid (EBL) to the prepared asphalt surface at a predetermined shot rate. Aggregate material is discharged from the spray paver onto the EBL. The system is utilized in performing a UBAS resurfacing method according to the present invention.

The invention relates to a self-propelled construction machine and to a method for controlling a self-propelled construction machine. The construction machine according to the invention has a position-determining device 13 for determining the position of a reference point R on the construction machine in a coordinate system (X, Y, Z) independent of the construction machine. The position-determining device has a navigation satellite system receiver 14 for receiving satellite signals from a global navigation satellite system 15 (GNSS) and a computing unit 16 which is configured so that the position of a reference point (R) on the construction machine and the orientation (ψ) of the construction machine can be determined based on the satellite signals in a coordinate system (X, Y, Z) that is independent of the construction machine. Moreover, the construction machine has a controller 18 which cooperates with the position-determining device 13 configured to adjust the steering angles of the steerable running gears 3, 4, 6 so that the reference point R of the construction machine moves along a set trajectory T. The computing unit 16 of the position-determining device 13 is configured so that, in a control mode in which the control of the construction machine is not based on the satellite signals of the global navigation satellite system 15, the position (x.sub.n, y.sub.n, z.sub.n) of the reference point (R) relating to the construction machine and the orientation (ψ) of the construction machine are determined in the coordinate system (X, Y, Z) that is independent of the construction machine while the construction machine is moving on the basis of a kinematic model 16A implemented in the computing unit 16 of the position-determining device 13 which describes the position (P) of the reference point (R) and the orientation (ψ) in the coordinate system (X, Y, Z) that is independent of the construction machine depending on the steering angles and the speeds of the running gears 3, 4, 6.

A linkage system for a screed extension includes a mounting plate that includes a mounting plate finger; an upper rail; a lower rail; a height adjustment shaft; a set of slide blocks that are disposed in a channel between the upper rail and the lower rail; a set of linkage arms; an angle of attack adjustment structure that holds the mounting plate finger at an angle; and a set of angle of attack adjustment screws. The height adjustment shaft is configured to adjust a position of the set of slide blocks within the channel and thereby adjust a height of a lower frame of the screed extension. The set of angle of attack adjustment screws are configured adjust the angle of the mounting plate finger and thereby adjust an angle of attack of the lower frame of the screed extension.

A road finishing machine with a screed for producing a paving layer on a subsoil includes a leveling system for height adjustment of the screed for compensating for irregularities in the subsoil. The leveling system includes a cascade control having either a central control loop between outer and inner control loops that includes a control unit to determine, on the basis of a detected actual value of a pulling point position of a pulling point of the screed to a predetermined reference, and on the basis of a desired value of the pulling point position, a desired value of a leveling cylinder position, or a pulling point control between the outer and inner control loops to determine, on the basis of the desired value of the pulling point position of the pulling point of the screed, the desired value of the leveling cylinder position.

A slipform paving machine includes an offset mold, including a mold frame, a form insert, a form insert actuator and a form insert sensor. A controller receives a signal from an external reference sensor and controls a position of the form insert actuator to control the height of the form insert relative to the mold frame and thereby control a height of at least a portion of a molded structure relative to a ground surface at least in part in response to the signal from the external reference sensor.

A levelling system for a road construction machine, especially for a paving machine or a road milling machine, includes a first height sensor arrangement, a second height sensor arrangement, a first controller, a second controller and an additional sensor. The first controller includes a first controller loop configured to control a height position of the first side of the tool or of the first side of the machine chassis based on the first actual value and a first setpoint. The second controller includes a second controller loop configured to control a height position of the second side of the tool or of the second side of the machine chassis based on the second actual value and a second setpoint. The first and/or the second controller are configured to adapt the setpoint based on the actual reference value, wherein a setpoint adaption takes place only either on the first side or on the second side of the tool or of the machine.

Screed plate assemblies, screed units, and pavers and methods for operating such assemblies, units, and pavers are disclosed. Example assemblies, units, and pavers include a screed plate assembly described herein. Such a screed plate assembly includes a screed plate, sensor(s) and actuator(s). Each sensor is mechanically coupled to the screed plate, and operative to sense a pressure on the screed plate and to communicate the sensed pressure. Each actuator is mechanically coupled to the screed plate, and operative to receive an input related to controlling an angle of attack (AoA) of the screed plate and to control the AoA of the screed plate based on the received input independent of controlling an AOA of another screed plate.