A method for adjusting the rotational speed of an internal combustion engine of a road-building machine which, in addition to a traction drive, has hydraulic motors which are connected to the internal combustion engine and which serve for driving working assemblies, in which method the rotational speed is adjusted as a function of the present power demand of the working assemblies, characterized in that the hydraulic motors are operated using fixed-displacement pumps, and residual volume flows presently to be discharged are reduced by flow valves for hydraulic motors of active working assemblies, for which purpose the rotational speed of the internal combustion engine is automatically adapted during working operation.

A method for adjusting the rotational speed of an internal combustion engine of a road-building machine which, in addition to a traction drive, has hydraulic motors which are connected to the internal combustion engine and which serve for driving working assemblies, in which method the rotational speed is adjusted as a function of the present power demand of the working assemblies, characterized in that the hydraulic motors are operated using fixed-displacement pumps, and residual volume flows presently to be discharged are reduced by flow valves for hydraulic motors of active working assemblies, for which purpose the rotational speed of the internal combustion engine is automatically adapted during working operation.

The invention provides a gas purification system, for instance for agricultural application comprising a corona discharge system, the corona discharge system comprising a counter electrode, a conductive strip with a longitudinal edge comprising tooth structures, wherein the tooth structures have tooth tops with shortest distances selected from the range of 2-200 mm; and a voltage generator configured to apply a DC voltage of at least 10 kV to the conductive strip.

A hopper spreader for installation on a vehicle has a flow regulator configured to regulate flow of particulate material from the container. The spreader has a conveyor mechanism for conveying particulate material to a spinner that distributes the particulate material to the surface over which the vehicle moves. The spreader also includes a flow regulation mechanism located between the particulate material in the hopper and the conveyor mechanism which is configured to regulate flow of material from the hopper to the conveyor mechanism.

A ratchet assembly may include a steer ring, a steer ring side structure, a steer cylinder bracket arm, a steer cylinder, a ratchet lock gear, a steering collar, a ratchet cylinder, a ratchet lock bar, and at least one sensor. When in a particular locked position, operation of the steer cylinder rotates the steer ring, the ratchet lock gear, and the steering collar. When in an unlocked position, operation of the steer cylinder rotates the steer ring around the ratchet lock gear.