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AssigneeABG Allgemeine Baumaschinen-Gesellschaft mbH
InventorHeinz Tiedemann
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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, connected to the internal combustion engine, for the driving of working assemblies, and in which method the rotational speed is adjusted dependent on the current power requirement of the working assemblies, wherein the hydraulic motors are operated using fixed displacement pumps and residual volume flows of flow control valves for hydraulic motors of active working assemblies, which residual volume flows are currently to be discharged, are reduced, for which purpose the rotational speed of the internal combustion engine is automatically adapted during working operation, the method comprising adjusting using a controller the flow control valves via a control line.
A road-building machine having an internal combustion engine for driving a traction drive as well as a plurality of hydraulic motors for working assemblies, and having a controller for adjusting the rotational speed of the internal combustion engine dependent on the current power requirement of the working assemblies, wherein each of the plurality of hydraulic motors can be operated by means of a fixed displacement pump, which is drivable by the internal combustion engine and the full volume flow of each of which can be influenced by means of a respective flow control valve, and the controller is connected as a connecting link between the flow control valves of the hydraulic motors and a rotational speed sensor of the internal combustion engine and has an adaptation control circuit, which provides a rotational speed signal set to a reduction of the residual volume flows of the flow control valves for hydraulic motors of active working assemblies, which residual volume flows are currently to be discharged, wherein the controller adjusts the flow control valves via a control line.
Dependencies are inferred from the claim text.