Steering General, Steering Components
60Pages

MAKING MODERN LIVING POSSIBLE Technical Information Steering General, Steering Components

Technical Information General, Steering Components Revision history Table of revisions Date Mistakes corrected Changed to Danfoss layout Steering column deleted First version

Technical Information General, Steering Components

Technical Information General, Steering Components

Technical Information General, Steering Components

Technical Information General, Steering Components A wide range of Steering Components Danfoss is one of the largest producers in the world of steering components for hydrostatic steering systems on off-road vehicles. Danfoss offers steering solutions both at component and system levels. Our product range makes it possible to cover applications of all types - ranging from ordinary 2-wheel steering (also known as Ackermann steering) to articulated steering, automatic steering (e.g. by sensor) and remote controlled steering via satellite. We can offer more than 1,800 different steering units...

Technical Information General, Steering Components A wide range of Steering Components Characteristic features for steering units: Low steering torque: From 0.5 N•m to 3 N•m in normal steering situations Low noise level Low pressure drop Many types available: Open center Non-reaction, Open center Reaction, Power Beyond, Closed center Non-reaction, Load Sensing, Load Sensing Reaction One or more built-in valve functions: relief valve, shock valves, suction valves, non-return valve in Pline and in LS-line Optional port connections (according to ISO, SAE or DIN standards) Characteristic...

Technical Information General, Steering Components Steering concepts Hydrostatic steering Danfoss steering components are used in vehicles where the driver has to control high steering forces, reliably, comfortably and with maximum safety. Steering units OSPM/OSPB/OSPC/OSPF/OSPR/OSPD/OSPU/OSPL The operation of Danfoss steering units OSP- is hydrostatic. That is to say, there is no mechanical connection between the steering column and the steered wheels. Instead there are hydraulic pipes and hoses between steering unit and steering cylinder(s). When the steering wheel is turned, the steering...

Technical Information General, Steering Components Steering concepts Flow-Amplifiers OSQA/OSQB In large vehicles and ships the steering units can be used Load sensing hydrostatic steering system withDanfoss Flow-amplifiers which amplify the oil flow to the with flow amplifier steering cylinders. These systems with steering units and flow-amplifiers also include an inbuilt priority valve which ensures that the steering takes priority. When the steering wheel is turned, the oil flow is divided in the flow-amplifier in such a way as to ensure that the necessary oil flow is led to the steering...

Technical Information General, Steering Components Steering components, general Steering Units: OSPM, OSPB, OSPC, OSPR, OSPF, and OSPL The steering unit consists of a rotary valve and a rotary meter. Via a steering column the steering unit is connected to the steering wheel of the vehicle. When the steering wheel is turned, oil is directed from the steering system pump via the rotary valve (spool and sleeve) and rotary meter (gear wheel set) to the cylinder ports L or R, depending on the direction of turn. The rotary meter meters the oil flow to the steering cylinder in proportion to the...

Technical Information General, Steering Components Steering components, general Steering unit with 2 rotary meters: OSPD The basic function of this type is like the main group of Danfoss steering units, except the gearwheel set (rotary meter). OSPD has 2 rotary meters, which are mechanically connected. A shift valve determines whether only one or both rotary meters are active. In the case of no pump supply only one rotary meter is active for emergency steering. In normal steering situations both rotary meters are active. 1 Housing with spool/sleeve set and valves 4 Distributor plates 2...

Technical Information General, Steering Components Steering components, general Steering unit with amplifier valve: OSPU The basic function of this type is like the main group of Danfoss steering units, except the rotary valve and a torque compensator valve. The rotary valve (spool/sleeve set) of OSPU has an amplification function, which adds flow directly to the cylinder ports in parallel with oil passing through the rotary meter (gear wheel set). In the case of no pump supply (emergency steering) only the gear wheel set meters oil to the cylinder ports. The function of the torque...

Technical Information General, Steering Components Steering components, general Priority valves: OLSA and OLS In systems with Danfoss priority valves and load sensing steering units, steering has first priority. When the steering wheel is turned, the oil flow is distributed in the priority valve in such a way that the oil flow necessary for steering is led to the steering unit through the CF (controlled flow) connection. The remaining oil flow is available for the working hydraulics through the EF (excess flow) connection. The distribution is controlled by the LS signal from the steering...

Technical Information General, Steering Components Steering components, general Flow-Amplifiers: OSQA and OSQB The flow-amplifiers OSQA and OSQB contain a directional valve, an amplification valve, a priority valve, a pilot pressure relief valve, shock and suction valves. In addition OSQB contains a back pressure valve. The flow-amplifier amplifies the oil flow from the steering unit cylinder ports L or R by an amplification factor of 4, 5, 8, 10 or 20. The amplified oil flow is directed from the flow-amplifier ports CL or CR to the steering cylinder(s). The amplified flow is proportional...

Technical Information General, Steering Components Steering components, general Steering valve EHPS The EHPS is a pilot operated directional valve. Oil from a pilot steering unit or an electrical signal can actuate the steering valve. Basicly the EHPS valve contains a directional valve, a priority valve, a pilot relief valve, a pilot pressure control valve, and shock- and suction valves. An electric actuation module, PVE, can be fitted onto the EHPS valve. In the type 1 system the controller is operated by an analog signal and the type 2 system the signal is digital with Canbus interface...