US 9,809,248 B2
Steering system
Thomas Bauer, Sydals (DK); and Soeren Moeller Hansen, Soenderborg (DK)
Assigned to Danfoss Power Solutions ApS, Nordborg (DK)
Appl. No. 12/63,886
Filed by Thomas Bauer, Sydals (DK); and Soeren Moeller Hansen, Soenderborg (DK)
PCT Filed Aug. 17, 2006, PCT No. PCT/DK2006/000450
§ 371(c)(1), (2), (4) Date Jul. 3, 2008,
PCT Pub. No. WO2007/019862, PCT Pub. Date Feb. 22, 2007.
Claims priority of application No. 2005 01164 (DK), filed on Aug. 18, 2005.
Prior Publication US 2009/0166124 A1, Jul. 2, 2009
Int. Cl. B62D 6/00 (2006.01); B63H 25/02 (2006.01); E02F 9/08 (2006.01); E02F 9/20 (2006.01)
CPC B62D 6/001 (2013.01) [B62D 6/002 (2013.01); B63H 25/02 (2013.01); E02F 9/0841 (2013.01); E02F 9/2087 (2013.01); B63H 2025/024 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A steering system comprising:
a controlled element which is movable in a neutral area and in areas on opposite sides outside of the neutral area based on a steering input, the neutral area comprising an area between a first position and a second position, the first position being on an opposite side of a neutral position than the second position;
a handle for controlling the position of the controlled element, the handle being movable between set-points in a centre zone corresponding to the controlled element's neutral area, the centre zone comprising an area between a first set-point and a second set-point, the first set-point being on an opposite side of a centre set-point than the second set-point; and
a steering unit arranged to receive set-points from the handle, and to move the controlled element to a corresponding position, the steering unit selecting between a fast down-ramp speed and a slow down-ramp speed by which the controlled element is moved in the neutral area towards the neutral position,
wherein when the handle is moved on opposite sides outside of the centre zone toward the centre set-point, the steering unit controls the controlled element to move on opposite sides outside of the neutral area toward the neutral position at the fast down-ramp speed,
wherein when the handle is moved in the centre zone to the centre set-point, the steering unit controls the controlled element to move in the neutral area to the neutral position at the slow down-ramp speed; and
wherein when the handle is moved from a position on one side outside of the centre zone to a position on the opposite side outside of the centre zone, the steering unit controls the controlled element to move through the neutral area at a constant fast ramp-down speed; and
wherein the slow down-ramp speed is slower than the fast down-ramp speed.