Nordborg, Denmark
Nordborg, Denmark

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Patent
Danfoss Power Solutions Aps | Date: 2016-01-20

A method for controlling steering of a vehicle (1) is provided, the vehicle (1) defining two or more steerable axes, and the vehicle (1) comprising a number of wheels (2), each of said wheels (2) being associated with one of said steerable axes in such a manner that steering of a given wheel (2) is obtained by steering the steerable axis associated therewith. The method comprises providing a first, a second and a third steering input. The first steering input defines a point of intersection between a virtual steering axis (4) and a longitudinal centre axis defined by the vehicle (1). The second steering input defines an angle between the virtual steering axis (4) and the longitudinal centre axis. The third steering input defines a position of a centre of rotation (5) along the virtual steering axis (4). A position for each of the steerable axes defined by the vehicle (1) is calculated, which causes the vehicle (1) to rotate about the centre of rotation (5) defined by the first, second and third steering inputs, and each of the steerable axes is moved to the calculated position.


Patent
Danfoss Power Solutions Aps | Date: 2016-11-16

A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (12) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).


Patent
Danfoss Power Solutions Aps | Date: 2016-04-20

A hydraulic system of a vehicle is provided, said system comprising:a first hydraulic circuit (1) having a first pressure source (2) and at least a first hydraulic consumer (3, 4),a second hydraulic circuit (5) having a second pressure source (6) and at least a second hydraulic consumer (7),connecting means (10, 11) allowing a flow of hydraulic fluid at least from said first hydraulic circuit (1) to said second hydraulic circuit (5),and control means (16) for controlling operation of said hydraulic consumers (3, 4, 7). Such a hydraulic system should allow safe operation of a vehicle with low energy consumption of the hydraulic system. To this end said control means (16) are connected to summation demand means (12), said summation demand means (12) controlling flow of hydraulic fluid from at least said first hydraulic circuit (1) to said second hydraulic circuit (5), said summation demand means (12) being connected to operation mode signal means (17) outputting an operation mode signal indicative of an operation mode of said vehicle, wherein said summation demand means (12) allow or block flow of hydraulic fluid from one hydraulic circuit (1) to another hydraulic circuit (5) in dependency of said operation mode signal.


Patent
Danfoss Power Solutions Aps | Date: 2016-10-12

A hydraulic steering system (1) is provided having a steering device (2) and a symmetrically acting steering motor (3), said steering device (2) 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 (14), two working lines (18, 19) each connecting said control valve (14) with one of said working ports (L, R), and a measuring motor (23). Such a hydraulic steering system should show a comfortable steering behavior. To this end said measuring motor (23) is arranged in one of said working lines (18, 19).


Patent
Danfoss Power Solutions Aps | Date: 2016-04-06

A hydraulic system (1) is disclosed comprising a pressure source (2), at least a hydraulic consumer (12, 13), and a pressure booster (16) arranged between the pressure source (2) and the hydraulic consumer (12, 13), wherein inactivating means (17) are provided inactivating or activating said pressure booster (16), said pressure booster (16) and said inactivating means (17) being part of a booster module (11). The operational possibilities of such a hydraulic system (1) should be extended. To this end the booster module (11) is part of a valve block (3), said valve block (3) comprising said booster module (11) and at least one valve module (9, 10) controlling said hydraulic consumer (12, 13).


Patent
Danfoss Power Solutions Aps | Date: 2016-05-18

A valve group (1) is disclosed comprising an inlet module (5) and at least one service module (2-4) connected to said inlet module (5), said inlet module(5) having a housing (19), a pressure port (PP), a pressure gallery (PG), a tank port (TP), a tank gallery (TG), a spool (20) movable in said housing (19) to interrupt in a first position (A) a connection between said pressure port (PP) and said pressure gallery (PG) and to connect in a second position (B) said pressure port (PP) and said pressure gallery (PG). The inlet module should have a simple construction. To this end said spool (20) in said first position (A) connects said pressure gallery (PG) and said tank gallery (TG), wherein a first pressure transducer (16) is provided to detect a first pressure in said pressure gallery (PG) and a second pressure transducer (17) is provided to detect a second pressure in said tank gallery (TG), said first pressure transducer (16) and said second pressure transducer (17) being connected to control means (18) determining the position of said spool (20) to be said first position (A) when said first transducer (16) and said second transducer (17) read a same pressure below a predetermined first threshold pressure and to be said second position (B) when said first pressure transducer (16) reads a higher pressure than said second pressure transducer (17).


Patent
Danfoss Power Solutions ApS | Date: 2016-04-07

A hydraulic steering system (1) is provided having a steering device (2) and a symmetrically acting steering motor (3), said steering device (2) 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 (14), two working lines (18, 19) each connecting said control valve (14) with one of said working ports (L, R), and a measuring motor (23). Such a hydraulic steering system should show a comfortable steering behavior. To this end said measuring motor (23) is arranged in one of said working lines (18, 19).


Patent
Danfoss Power Solutions ApS | Date: 2016-04-07

A hydraulic steering system (1) is described comprising a first steering circuit (2a) and a second steering circuit (2b), each of said steering circuits (2a, 2b) comprising a steering device (3a, 3b) and a steering motor (4a, 4b) connected to said steering device (3a, 3b), each of said steering devices (3a, 3b) 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 (4a, 4b), a control valve (5a, 5b), and a measuring motor (6a, 6b). Such a steering system should have a comfortable steering behavior. To this end in each of said steering devices (3a, 3b) said measuring motor (6a, 6b) is arranged in a working line (19a, 20b) between said control valve (5a, 5b) and one of said working ports (La, Ra; Lb, Rb).


Patent
Danfoss Power Solutions Aps | Date: 2016-10-12

A hydraulic steering system (1) is described comprising a first steering circuit (2a) and a second steering circuit (2b), each of said steering circuits (2a, 2b) comprising a steering device (3a, 3b) and a steering motor (4a, 4b) connected to said steering device (3a, 3b), each of said steering devices (3a, 3b) 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 (4a, 4b), a control valve (5a, 5b), and a measuring motor (6a, 6b). Such a steering system should have a comfortable steering behavior. To this end in each of said steering devices (3a, 3b) said measuring motor (6a, 6b) is arranged in a working line (19a, 20b) between said control valve (5a, 5b) and one of said working ports (La, Ra; Lb, Rb).


Patent
Danfoss Power Solutions Aps | Date: 2016-05-25

A shaft (1) is shown comprising a shaft section (2) having an axis (3), a tooth geometry (4) at least at one end of said shaft section, said tooth geometry (4) having a first end (5) opposite said shaft section (2) and a second end (6) adjacent said shaft section (2), a number of teeth (7) distributed in circumferential direction around said axis (3), a bottom curve(9) between adjacent teeth (7), and an outer tooth curve (12), said bottom curve (9) having a positive slope from said first end (5) towards said shaft section (2) and a negative slope (14) at said second end (6). In such a shaft wear should be made as small as possible. To this end said bottom curve (9) comprises a section having a concave bottom curvature (15) between said positive slope and said negative slope.

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