Danfoss Power Solutions Aps

Sauer Danfoss Aps

Sauer-danfoss Holding A/s

Tom Rudolph

Poul Ennemark

Svend Erik Thomsen

Jens Vester

Torben Juul

Tom Tychsen

Niels Bjarne Hansen

J&oslash;rgen Clausen

Bendt Porskrog

Morten Hoeck Petersen

Bjarne Schmidt

Soeren Liljenberg

Peter Gade Peistrup

Poul Henning Holm Pedersen

Thomas Traeger Hansen

Lee Mahlum

Radoslaw Kornicki

Søren Pedersen

A hydraulic steering arrangement () comprising a supply port arrangement having a pressure port and a tank port, a working port arrangement having two working ports (L, R), a mechanical steering unit () connected to a steering wheel () and being arranged between the supply port arrangement and the working port arrangement (L, R), supply valve means () having a connection to the pressure port and to the working port arrangement (L, R) and being controlled by a controller (), and a steering wheel sensor () connected to the controller () is described. Such a steering arrangement could allow a comfortable feeling for the driver. To this end the steering wheel sensor () is mounted in a position of minimum play to steering wheel () and steering wheel sensor () and detects a beginning of a movement of the steering wheel (), wherein the controller () actuates the supply valve means () upon beginning of the movement, and the supply valve means () supply hydraulic fluid to the working port arrangement (L, R).

Hydraulic steering arrangement

A hydraulic steering system () is provided having a steering device () and a symmetrically acting steering motor (), said steering device () comprising a supply port arrangement having a high pressure port (P) and a low pressure port (T), a working port arrangement having two working ports (L, R), a control valve (), two working lines () each connecting said control valve () with one of said working ports (L, R), and a measuring motor (). Such a hydraulic steering system should show a comfortable steering behavior. To this end said measuring motor () is arranged in one of said working lines ().

Hydraulic steering system

A hydraulic steering system () is described comprising a first steering circuit () and a second steering circuit (), each of said steering circuits () comprising a steering device () and a steering motor () connected to said steering device (), each of said steering devices () comprising a supply port arrangement having a high pressure port (Pa, Pb) and a low pressure port (Ta, Tb), a working port arrangement having two working ports (La, Ra; Lb, Rb) connected to said steering motor (), a control valve (), and a measuring motor (). Such a steering system should have a comfortable steering behavior. To this end in each of said steering devices () said measuring motor () is arranged in a working line () between said control valve () and one of said working ports (La, Ra; Lb, Rb).

A hydraulic steering device () is described comprising a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path () between the supply port (P) and the working port arrangement, a return flow path () between the working port arrangement and the tank port (T), flow meter means () being arranged in said main flow path (), said flow meter means () comprising at least two flow meters () and a flow meter valve means (), said flow meter valve means () in a first operation mode connecting at least two flow meters () in parallel and in a second operation mode making inactive at least one flow meter (). Such a steering device should be operated comfortable for a driver. To this end an amplification flow path () is arranged in parallel to said main flow path (), said amplification flow path () being connected to said main flow path () downstream said flow meter means () in a direction from said supply port (P) to said working port arrangement.

Hydraulic steering device

The invention concerns a hydraulic steering () with a steering unit () with feedback behavior, a steering motor () connected to the steering unit () via working pipes (L, R), a steering member () and a feedback suppression device (), which is located in at least one working pipe (L, R). It is endeavored to change the feedback behavior of such a steering in a simple manner. For this purpose, the feedback suppression device () has a valve arrangement () with hydraulic control inlet (C).

Hydraulic steering

The invention concerns a hydraulic steering () with a supply connection arrangement (P, T), a steering motor () and a steering unit () between the supply connection arrangement and the steering motor (), the steering unit () having a directional section () and a measuring section (), a steering valve () being arranged in parallel to the steering unit (). With such a steering, it is endeavored to achieve the best possible safety. For this purpose, it is ensured that for each steering direction the directional section () comprises a first outlet (AL, AR), which is connected to the steering motor () by means of a first pipe (), and a second outlet (AL, AR), which is connected to the steering motor () by means of a second pipe (), the first outlet (AL, AR) being, in the neutral position of the directional section (), connected to the measuring section (), and the first pipe () being interruptible by means of a valve 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.

A method for steering a vehicle and a steering system ( ) comprises: a vehicle, with a first wheel steering arrangement ( ), and a second articulated steering arrangement ( ), a steering unit ( ) which is common for both steering ( ) arrangements and a sensor arrangement connected to a corrective device to sense a steering deflection of the second steering arrangement ( ). A dead band is monitored by the steering deflection of the second steering ( ) arrangement, a correction of the second steering ( ) being effected when leaving the dead band and activating the first steering arrangement ( ). The sensor arrangement has a dead band sensor ( ) on the second steering ( ), which is connected with a correcting device ( ), which supplies pressurised fluid to the second steering ( ) arrangements on leaving a predetermined dead band and activating the steering unit ( )

Method for steering a vehicle and steering system therefore

A steering system and a method for steering a vehicle, that has a wheel steering and an articulated steering. The steering system ( ) has a steering unit ( ), a first steering motor arrangement ( ), which acts upon steered wheels, a second steering motor arrangement ( ), which acts upon a converting kit, and a selection valve ( ), which connects the steering unit ( ) with either the first steering motor arrangement ( ) or the second steering motor arrangement ( ) in such a way that a steering will activate either the wheel steering or the articulated steering.

Steering system and method for steering a vehicle

A hydraulic steering system ( ) for a vehicle with two steering motor arrangements, particularly an articulated vehicle with wheel steering, with a hydraulic steering unit ( ) having a measuring motor section ( ), with a selection valve ( ), which connects an outlet (L, R) of the steering unit ( ) with either a first steering motor arrangement ( ) that preferably acts upon steered wheels, or a second steering motor arrangement ( ) that preferably acts upon a converting kit, and which is hydraulically operable via a pilot valve ( ), and with a pump ( ), which is connected with the steering unit ( ) and the pilot valve ( ). This permits the vehicle to be steerable in connection with an emergency.

Hydraulic steering system, for an articulated vehicle with wheel steering

A steering system ( ) for a vehicle with a first steering arrangement ( ), with a first sensor ( ), with a second steering arrangement ( ), which includes an articulated steering, which has a second sensor ( ), and with a steering unit ( ). To improve the steering comfort, the steering unit ( ) is fixedly connected with the first steering arrangement ( ) and the second steering arrangement ( ) is connected with a follow-up arrangement, which comprises the first sensor ( ), a control device ( ) and a valve arrangement ( ).

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Sydals, Denmark

Tom Rudolph