Sauer Danfoss Aps

Bjarne Schmidt

Poul Henning Holm Pedersen

Tom Rudolph

Niels Bjarne Hansen

Ove Pedersen

Lee Mahlum

Radoslaw Kornicki

J&oslash;rgen Clausen

The invention concerns a hydraulic steering arrangement () with a supply connection arrangement having at least a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement having at least two working connections (L, R), a steering unit (), which can be activated by a steering transducer (), the steering unit having a first load-sensing connection (LS), and a steering valve () having a second load-sensing connection (LS), the steering unit () and the steering valve () being arranged in parallel with each other between the supply connection arrangement and the working connection arrangement. It is endeavoured to ensure a good steering behaviour. For this purpose, a priority valve () is connected in series with the high-pressure connection (P), said priority valve () having a third load-sensing connection (LS), which is connected with the first load-sensing connection (LS) via a pipe (), in which is located a control valve () that can be activated by the second load-sensing connection (LS).

Hydraulic steering arrangement

The invention concerns a hydraulic steering arrangement with a steering motor, a supply path between a pressure source and the steering motor, in which supply path a throttling device and a measuring motor are located, a return path between the steering motor and a pressure sink, in which return path a return throttle is located, and a bypass path, which connects the supply path and the return path on the pressure source end or the pressure sink end, respectively, and which has a bypass throttle. It is endeavoured to make such steering arrangements suitable for fast motorboats. For this purpose it is ensured that with a load on the steering motor the pressure drop over the bypass throttle is larger than the sum of the pressure drops between a point before the first throttle and a point after the last throttle of the throttling device.

The invention concerns a fully hydraulic steering with a steering member, a steering unit that can be activated by the steering member, said steering unit comprising a supply connection arrangement (P, T) with a pressure connection (P) and a tank connection (T), and a working connection arrangement (L, R) with two working connections (L, R), and a steering motor, which is connected with the working connection arrangement (L, R). It is endeavored to increase the possibilities of steering. For this purpose, it is ensured that an auxiliary force operated steering valve is arranged in parallel to the steering unit between the supply connection arrangement (P, T) and the working connection arrangement (L, R).

Fully hydraulic steering

A hydraulic steering system ( ) with a supply connection arrangement, having a high-pressure connection (P) and a low-pressure connection (T), and with a working connection arrangement (L, R), a directional valve ( ) and a metering pump unit ( ) being arranged between the supply connection arrangement and the working connection arrangement, the metering pump arrangement having at least two hydraulically parallel-connected and mechanically parallel-operated metering pumps ( ) with a shut-off valve ( ) in a hydraulic connection between the two metering pumps ( ), said shut-off valve ( ) having a return spring ( ) and a first control inlet ( ) that is connected with the high-pressure connection (P).

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Augustenborg, Denmark

Bjarne Schmidt