GB2449340A - Torque sensor in a power assisted vehicle steering column - Google Patents

Torque sensor in a power assisted vehicle steering column Download PDF

Info

Publication number
GB2449340A
GB2449340A GB0808290A GB0808290A GB2449340A GB 2449340 A GB2449340 A GB 2449340A GB 0808290 A GB0808290 A GB 0808290A GB 0808290 A GB0808290 A GB 0808290A GB 2449340 A GB2449340 A GB 2449340A
Authority
GB
United Kingdom
Prior art keywords
piece
pinion
sensor
steering
assisted steering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0808290A
Other versions
GB0808290D0 (en
GB2449340B (en
Inventor
Eric Darblade
Pierre Monnet
Anthony Sarzier
Philippe Chauvrat
Vianney Besnault
Roland Goyard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Europe SAS
Original Assignee
JTEKT Europe SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JTEKT Europe SAS filed Critical JTEKT Europe SAS
Publication of GB0808290D0 publication Critical patent/GB0808290D0/en
Publication of GB2449340A publication Critical patent/GB2449340A/en
Application granted granted Critical
Publication of GB2449340B publication Critical patent/GB2449340B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves
    • B62D5/0832—Rotary valves with elastic means other than a torsion bar, e.g. leaf springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021—Determination of steering angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—Rotary-transmission dynamometers
    • G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Steering Mechanism (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)

Abstract

Motor vehicle assisted steering, comprises, between the steering wheel on the one hand and the pinion (5) and rack (6) mechanism on the other hand, a steering-wheel torque sensor (13) from which the intensity of the assistance action is controlled, the torque sensor (13) being formed by an angle sensor able to measure the angular difference between a rotary part (3) connected to the steering wheel and another rotary part (5a) connected to the pinion (5) or formed by this pinion itself. The torque or angle sensor (13) comprises at least one piece (14) made from flexible material, elastically deformable in the circumferential direction, which is inserted between the rotary part (3) connected to the steering wheel and the rotary part (5a) connected to the pinion (5) or formed by this pinion (5) itself, the deformation of this flexible piece (14) giving a measurement of the angle or torque.

Description

POWER ASSISTED VEHICLE STEERING
The present invention concerns, in general terms, motor vehicle steering systems, or more precisely assisted steering systems for motor vehicles, whether these be hydraulic, electrical or other.
In assisted steering systems the torque or assistance force supplied by the system in order to relieve the driver of the vehicle is slaved to the torque exerted by the driver on the vehicle steering wheel, also referred to as the steering-wheel torque. For this purpose, the steering-while torque is measured by a torque sensor, from which the intensity of the assistance action is controlled. Among the torque sensors used, the most usual sensor is art angle sensor, using a metal torsion bar, and disposed so that the torsion angle of the bar is an increasing function, in particular linear, of the torque applied to the steering wheel.
In particular, in the case of hydraulic assisted steering, the torsion bar is normally incorporated in the assistance valve, so that not only does this torsion bar measure the torque at the steering wheel, but also it directly controls, according to its instantaneous torsion angle, the distribution of the hydraulic fluid by the assistance valve.
This prior art is illustrated by Fig 1 of the accompanying schematic drawing, which is a view in longitudinal section of a conventional assistance valve and the adjacent parts of the hydraulic assisted steering system.
The assistance valve, designated here overall by the numerical reference 2, comprises a rotor 3 connected by means of a torsion bar 4 to a steering pinion 5, which comes into engagement with the steering rack 6, a pusher device 7 acting on the back of the rack 6 in order to press this rack against the pinion 5.
The rotor 3 of the assistance valve 2 is surrounded by a rotary jacket 8, rotationally connected with the pinion 5. This rotor 3 is also rotationally connected, by its end remote from the pinion 5, to the steering column (not shown) of the vehicle concerned. The rotor 3, the pinion 5 and the jacket 8 are thus mounted so as to rotate, on a common central axis A, in a valve casing 9, by means of bearing housings 10, 11 and 12.
The assistance valve 2 also comprises channels and chambers filled with oils, here not detailed, which enable it to behave in use as a hydraulic distributor supplying an oil pressure that is an increasing function of the steering-wheel torque, or in other words of the torque applied by the steering column to this valve 2 and deforming the torsion bar 4. The oil pressure, and the oil flow resulting therefrom, supply one or other of the two chambers of the cylinder associated with the rack 6, so as to amplify the movement force on this rack 6, the movements of this rack controlling the orientation of the steered wheels of the vehicle Concerned.
By way of examples of such an assistance valve with torsion bar, reference is made to the French patent applications FR 2 752 809, FR 2 810 957 and FR 2 869 864.
In the case of electric assisted steering, the use of a torsion bar or a similar deformable element remains possible, in association with an electrical, magnetic or strain-gauge sensor that provides either the torsion angle or directly the torque at the steering wheel -see for example the patent US 5975136 and the German patent application DE 10200409 Al.
The presence of a torsion bar, which must necessarily have a certain length in order to give rise to a usable torsion angle, results in a large size of the assistance valve in the case of hydraulic assisted steering or a large size of any other part of the steering system used as a torque sensor, in particular in the case of electric assisted steering.
In addition, the torsion bar produces an entirely metal connection, and therefore without damping, between the rack and pinion mechanism of the steering on the one hand and the steering column and/or steering wheel on the other hand, so that it fully transmits noise and vibration, which may constitute nuisances and be detrimental to the correct functioning of the steering. The solution to this problem is currently afforded only by adding a damping element, for example made from rubber, to the valve or torsion bar (see patent US 5058695 or patent JP 2002-217081).
The present invention aims to remedy all these drawbacks by providing a solution eliminating the torsion bar and thereby its drawbacks and therefore a solution providing a more compact and simpler embodiment of the assistance valve or any part serving as a torque sensor at the steering wheel in assisted steering, while allowing filtering of the noise and vibration being transmitted back.
To this end, an object of the invention is motor-vehicle assisted steering comprising, between the steering wheel on the one hand and the rack and pinion mechanism on the other hand, a sensor for the torque at the steering wheel from which the intensity of the assistance action is controlled, the torque sensor consisting of an angle sensor able to measure the angular difference between a rotary part Connected to the steering wheel and another rotary part connected to the pinion or formed by this pinion itself, this assisted steering being essentially characterised by the fact that the torque or angle sensor comprises at least one piece made from flexible material, elastically deformable in the circumferential direction, which is inserted between the rotary part connected to the steering wheel and the rotary part connected to the pinion or formed by this pinion itself, the deformation of this elastic piece giving a measurement of the angle or torque.
Thus, according to the principle of the present invention, the function of the traditional torsion bar is fulfilled by a piece produced from a flexible material, which by itself allows a measurement of angle, this piece being inserted between a first rigid part able to be designated as the input shaft of the torque sensor and a second rigid part able to be designated as the output shaft of the same torque sensor.
The said flexible piece being called on to deform elasticafly, progressively according to the magnitude of the torque to be measured, it is necessary to choose the magnitude of the stiffness of this piece suitably, by acting on the nature of the material making up the flexible piece and on the geometry of this piece.
With regard to the material making up the said piece, this is advantageously a flexible material of the elastomer or thermoplastic elastomer type.
As for the geometry of the said flexible piece, this preferably has an annular shape overall, however with non-circular internal and external contours for its attachment to the two rotary parts, one connected to the steering wheel and the other connected to the pinion or formed by the pinion itself, these two rotary parts being dispersed coaxially.
Thus the flexible piece is inserted between an input shaft of the sensor disposed internally and an output shaft of the sensor disposed externally or vice versa, the internal and external contours of the flexible piece being able to have an angular shapes or formations of the notch type for attachment to complementary formations provided on the two rotary parts, or in other words on the input and output shafts of the sensor. In addition, the piece made from flexible material may comprise recesses, the number, dimensions and arrangement of which are chosen so as to adjust the stiffness of the device.
In particular, in the case of hydraulic assisted steering, the piece made of flexible material can be inserted between the rotor of the assistance valve, a rotor constituting here the input shaft of the sensor, and the pinion, which then forms the output shaft of the sensor, the end of the rotor surrounding the end of the pinion or being surrounded by the latter.
In the simplest design, the piece made from flexible material directly connects the rotary part forming the input shaft of the sensor to the rotary part forming the output shaft of the sensor, providing the rotational connection between these two parts or shafts.
According to another design, the piece made from flexible material is inserted between an internal rigid angular piece and an external rigid angular piece in order to form an insert that will itself be interposed between the input shaft and the output shaft of the sensor.
Overall, a torque or angle sensor is thus obtained, the size of which is reduced, in particular in the axial direction, which also makes it possible to reduce the dimensions of the subassembly, such as the assistance valve, receiving this sensor.
In addition the solution that is the object of the invention is particularly simple and in particular eliminates the metal torsion bar, which is a technical part requiring specific surface treatment and assembly. Thus the invention also affords a reduction in costs compared with the current design with a torsion bar.
In the case of an insert composed of the flexible piece and two rigid annual pieces, the number of components is certainly slightly increased but with the benefits of the advantage of pre-assembly facilitating the operations of assembling the steering system.
In the case of the application of the invention of hydraulic assisted steering, the design and forms of assistance valve are not fundamentally modified, which can be perceived as an additional advantage.
Finally, in all cases, the flexible material of the sensor affords a not insignificant damping property, making it possible to filter certain noise and vibration frequencies detrimental to the correct functioning of the steering.
in any event, the invention will be better understood by means of the following description, with reference to the accompanying schematic drawing depicting, by way of examples, a few embodiments of this motor vehicle assisted steering: Figure 1 (already mentioned) is a partial view in section of hydraulic assisted steering according to the prior art, showing in particular the assistance valve; Figure 2 is a view in section similar to Fig 1 but showing assisted steering according to the present invention; Figure 3 is a partial view in section to an enlarged scale, along the line Ill-Ill in figure 2, showing more particularly the torque sensor with its piece made from flexible material; Figure 4 is a view in section similar to Fig 3 illustrating a variant with the insertion of the torque sensor.
In Figure 2, the components of the steering system and in particularly of the assistance valve 2, corresponding to those visible in Figure 1, are designated by the same numerical references and will not be described again.
Inside the assistance valve 2, the steering pinion 5 is extended by an annular end part 5a defining a recess centred on the axis A, while the rotor 3 comprises an end engaged in this recess and therefore surrounded by the end 5a of the pinion. At this point a torque sensor 13 is formed, shown in more detail in Figure 3.
The end of the rotor 3, constituting the input shaft of the sensor 13, has here a solid section angular in contour, in the general form of a rectangle with two rectilinear large sides and two curved small sides. The annular end 5a of the pinion has a section with an angular internal contour, corresponding substantially to the previous contour and defining with it an annular interstice with internal and external contours.
In this interstice a flexible piece 14 with a corresponding shape is inserted, made from elastically deformable material of the elastomer or thermoplastic elastomer type. The flexible piece 14 therefore has an angular internal contour 14a and also an angular external contour 14b, contours by means of which it effects a rotational connection between the rotor 3 and pinion 5. In addition, the flexible piece 14 can comprise, in particular in its thickest areas, recesses 14c that make it possible to adjust its stiffness.
During the functioning of the assisted steering (here hydraulic) and according to the torque at the steering wheel, the flexible piece 14 deforms elastically in the circumferential direction, thus allowing a more or less great angular offset between the rotor 3 on the one hand the pinion 5 and therefore also the jacket 8 on the other hand, which drives the assistance valve 2 by fulfilling the function normally provided by the torsion bar.
Figure 4 illustrates another embodiment of the torque sensor 13, here composed of the flexible piece 14, an internal metal angular piece 15 and an external metal angular piece 16, joined in an insert 17.
The flexible piece 14, roughly annular in shape, has an internal profile 14a with four notches 18 disposed in a cross. It has an external profile 14b in a cross, with four notches 19 offset angularly with respect to the previous notches 18. Recesses 14c are possibly provided in the thickest areas of the piece 14, present between the various notches 18 and 19.
The internal metal angular piece 15 comprises, externally, ribs 15a here four in number, engaged respectively in the notches 18 in the flexible piece 14. This internal rigid piece 15 also has, on its own internal contour, flutes 15b provided for its rotational connection with the rotor 3, or with any other rotary element forming an input shaft of the sensor 13.
The external metal piece 16 comprises, internally, ribs 16a, here four in number, engaged respectively in the notches 19 in the flexible piece 14. This external rigid piece 16 also has, on its own external contour, flutes 16b provided for its rotational connection with the end 5a of the steering pinion 5, or with any other rotary element forming an output shaft of the sensor 13.
The insert 16, preassembled, can thus be easily mounted between the two elements forming respectively the input shaft and the output shaft of the sensor 13.
As goes without saying, the invention is not limited solely to the embodiments of this assisted steering and in particular its steering-wheel torque sensor described below by way of examples; on the contrary it embraces all variant embodiments and applications complying with the same principle.
Thus, in particular, the following would not be departing from the scope of the invention: -producing the flexible piece from any suitable material, with elastic deformation properties; -giving any (non-circular) shapes to the internal and external contours of the flexible piece; -exchanging the positions of the elements forming input and output shafts of the sensor, the input shaft being able to surround the flexible piece and the output shaft; -intending such a sensor for assisted steering of any type, not only hydraulic assisted steering but also electrical assisted steering; -in particular in the case of application to electrical assisted steering, placing the torque sensor at any suitable point in the steering system, between the steering wheel on the one hand and the rack and pinion mechanism on the other hand.

Claims (9)

1. Motor vehicle assisted steering, comprising, between the steering wheel on the one hand and the pinion (5) and rack (6) mechanism on the other hand, a steering-wheel torque sensor (13) from which the intensity of the assistance action is controlled, the torque sensor (13) being formed by an angle sensor able to measure the angular difference between a rotary part (3) connected to the steering wheel and another rotary part (5a) connected to the pinion (5) or formed by this pinion itself, characterised in that the torque or angle sensor (13) comprises at least one piece (14) made from flexible material, elastically deformable in the circumferential direction, which is inserted between the rotary part (3) connected to the steering wheel and the rotary part (5a) connected to the pinion (5) or formed by this pinion (5) itself, the deformation of this flexible piece (14) giving a measurement of the angle or torque.
2. Assisted steering according to claim 1, characterised in that the material making up the said piece (14) is a flexible material of the elastomer or thermoplastic elastomer type.
3. Assisted steering according to claim 1 or 2, characterised in that the flexible piece (14) has a roughly annular shape, however with non-circular internal (14a) and external (14b) contours for attaching it to the two rotary parts (3, 5a), one connected to the steering wheel and the other connected to the pinion (5) or formed by this pinion (5) itself, these two rotary parts (3, 5a) being disposed coaxially.
4. Assisted steering according to claim 3, characterising that the internal (14a) and external (14b) contours of the flexible piece (14) have angular shapes or formations of the notch type (18, 19), for attachment to complementary formations provided on the two rotary parts (3, 5a).
5. Assisted steering according to claim 3 or 4, characterised in that the piece made from flexible material (14) comprises recesses (14c) provided for adjusting the stiffness of the device.
6. Assisted steering according to any one of claims 3 to 5, characterised in that, in the case of hydraulic assisted steering, the piece made from flexible material (14) is inserted between the rotor (3) of the assistance valve (2), the rotor (3) constituting the input shaft of the sensor (13), and the pinion (5) that forms the output shaft of the sensor (13), the end of the rotor (3) surrounding the end (5a) of the pinion (5) or being surrounded by the latter.
7. Assisted èteering according to any one of claims 1 to 6, character,sed in that the piece made from flexible material (14) directly connects the rotary part (3) forming the input shaft of the sensor (13) to the rotary part (5, 5a) forming the output shaft of the sensor (13), providing the rotational connection between these two parts (3, 5, 5a) or shafts.
8. Assisted steering according to any one of claims I to 6, characterised in that the piece made from flexible material (14) is inserted between an internal rigid angular piece (15) and an external rigid angular piece (16), in order to form an insert (17) itself interposed between the input shaft (3) and the output shaft (5, 5a) of the sensor (13).
9. Assisted steering according to claim 8, in that the internal rigid angular piece (15) has, on its own internal contour, flutes (15) for its rotational connection with the input shaft (3) of the sensor (13), while the external rigid angular piece (16) has, on its own external contour, flutes (16b) for its rotational connection with the output shaft (5, 5a) of the sensor (13) or vice versa.
GB0808290A 2007-05-15 2008-05-08 Power assisted vehicle steering Expired - Fee Related GB2449340B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0703489A FR2916179B1 (en) 2007-05-15 2007-05-15 POWER ASSISTED STEERING OF A MOTOR VEHICLE WITHOUT A TORSION BAR

Publications (3)

Publication Number Publication Date
GB0808290D0 GB0808290D0 (en) 2008-06-11
GB2449340A true GB2449340A (en) 2008-11-19
GB2449340B GB2449340B (en) 2009-04-22

Family

ID=38468919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0808290A Expired - Fee Related GB2449340B (en) 2007-05-15 2008-05-08 Power assisted vehicle steering

Country Status (3)

Country Link
DE (1) DE102008023331B4 (en)
FR (1) FR2916179B1 (en)
GB (1) GB2449340B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012020403A1 (en) 2012-10-18 2014-04-24 Volkswagen Aktiengesellschaft Steering system of motor vehicle used for commercial applications, has steering pinion bearing that allows displacement of steering pinion in direction of rotational axis
DE102014215423A1 (en) 2014-08-05 2016-02-11 Volkswagen Aktiengesellschaft Torque measuring device and steering shaft for a motor vehicle
DE102015211730B4 (en) * 2015-06-24 2019-10-31 Volkswagen Aktiengesellschaft Torque unit with elastic coupling element and method for mounting a torque unit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001767A (en) * 1977-07-29 1979-02-07 Zahnradfabrik Friedrichshafen Measuring torque and rotation
US4269043A (en) * 1979-02-24 1981-05-26 Toyota Jidosha Kogyo Kabushiki Kaisha Coupling for resiliently connecting two shafts for transmission of torque
FR2550505A1 (en) * 1983-08-10 1985-02-15 Renault Steering column with a torque detecting device especially for motor vehicles
US5009110A (en) * 1987-02-03 1991-04-23 Zahnradfabrik Friedrichshafen, Ag. Torque sensor, in particular for electric steering mechanism
US5975136A (en) * 1995-09-08 1999-11-02 Trw Fahrwerksysteme Gmbh & Co. Kg Torsional sensor for a power-assisted steering device
US6223608B1 (en) * 1998-06-02 2001-05-01 Mitsubishi Denki Kabushiki Kaisha Torque detector
US20020033092A1 (en) * 2000-09-14 2002-03-21 Arthur Schafert Steering booster device
WO2006005528A1 (en) * 2004-07-10 2006-01-19 Leopold Kostal Gmbh & Co. Kg Torsion module for a torque detection device, and method for producing a spoked wheel for a torsion module

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3465444D1 (en) * 1983-03-09 1987-09-24 Corint Srl Power-assisted rack-and-pinion steering apparatus
DE3522268A1 (en) * 1984-06-22 1986-01-02 Honda Motor Co Ltd ELECTROMAGNETIC SERVO UNIT
ZA863782B (en) * 1986-05-21 1988-01-27 Ludwig Maier Coupling
JPH02109772U (en) * 1989-02-20 1990-09-03
ES2036126B1 (en) * 1991-04-19 1993-12-16 Bendix Espana ROTARY HYDRAULIC DISTRIBUTOR.
JP3264616B2 (en) * 1996-03-13 2002-03-11 株式会社山田製作所 Elastic joints in steering devices
FR2752809B1 (en) * 1996-09-04 1998-10-30 Soc D Mecanique D Irigny ASSISTANCE VALVE FOR POWER STEERING OF MOTOR VEHICLE
FR2810957B1 (en) * 2000-06-28 2002-09-13 Soc Mecanique Irigny ASSISTANCE VALVE FOR HYDRAULIC POWER STEERING OF MOTOR VEHICLE
JP2002217081A (en) * 2001-01-12 2002-08-02 Nikon Corp Alignment method, method and system for exposure, and method for fabricating device
DE10200409B4 (en) * 2001-05-03 2011-08-11 Continental Teves AG & Co. OHG, 60488 Transducer body and sensor for converting a shear force or a torque into an electrical signal
FR2869864B1 (en) * 2004-05-06 2006-06-09 Koyo Steering Europ K S E Soc ASSISTANCE VALVE FOR A HYDRAULIC POWER STEERING OF A MOTOR VEHICLE

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001767A (en) * 1977-07-29 1979-02-07 Zahnradfabrik Friedrichshafen Measuring torque and rotation
US4269043A (en) * 1979-02-24 1981-05-26 Toyota Jidosha Kogyo Kabushiki Kaisha Coupling for resiliently connecting two shafts for transmission of torque
FR2550505A1 (en) * 1983-08-10 1985-02-15 Renault Steering column with a torque detecting device especially for motor vehicles
US5009110A (en) * 1987-02-03 1991-04-23 Zahnradfabrik Friedrichshafen, Ag. Torque sensor, in particular for electric steering mechanism
US5975136A (en) * 1995-09-08 1999-11-02 Trw Fahrwerksysteme Gmbh & Co. Kg Torsional sensor for a power-assisted steering device
US6223608B1 (en) * 1998-06-02 2001-05-01 Mitsubishi Denki Kabushiki Kaisha Torque detector
US20020033092A1 (en) * 2000-09-14 2002-03-21 Arthur Schafert Steering booster device
WO2006005528A1 (en) * 2004-07-10 2006-01-19 Leopold Kostal Gmbh & Co. Kg Torsion module for a torque detection device, and method for producing a spoked wheel for a torsion module

Also Published As

Publication number Publication date
DE102008023331B4 (en) 2013-05-29
DE102008023331A1 (en) 2009-01-15
GB0808290D0 (en) 2008-06-11
FR2916179B1 (en) 2009-09-18
FR2916179A1 (en) 2008-11-21
GB2449340B (en) 2009-04-22

Similar Documents

Publication Publication Date Title
US20170036690A1 (en) Steering shaft for a motor vehicle
US20120322566A1 (en) Reducer of electric power steering system
US7370724B2 (en) Motor-driven steering assist apparatus
US20040104067A1 (en) Drive device of a motor vehicle axle steering module and an electromechanical motor vehicle steering system
KR20110006897A (en) The torque angle sensor and the electronic power steering apparatus having the same
CN109963770B (en) Steering transmission mechanism and steering system
GB2449340A (en) Torque sensor in a power assisted vehicle steering column
EP1106475B1 (en) Power steering apparatus
US10647345B2 (en) Steering column for vehicle
WO2009077832A1 (en) Steering apparatus
US20160010740A1 (en) Worm speed reducer and electric power steering system using the same
KR102174602B1 (en) Steering apparatus for vehicle
US20050092948A1 (en) Power steering valve
KR102660407B1 (en) Rack Assist Type Electric Power Steering Apparatus
EP1905672B1 (en) Electric power steering system
JP2006143186A (en) Electric power steering device
JP2006206005A (en) Electric power steering device
KR20160041486A (en) Anti rattle device for motor-driven power steering
KR20130074074A (en) Electric power steering apparatus for vehicle
JP2007182176A (en) Electric power steering device
JP2005112047A (en) Vehicular electric power steering device
JPH11321694A (en) Tie rod fitting structure for center take-off type power steering device
US20240011555A1 (en) Speed reducer with gap compensation for electric power steering
JP5434250B2 (en) Vehicle steering damper device and steering device
KR940002083B1 (en) Power steering apparatus

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20200508