Abstract

In a steering device (PS1) according to the present invention, a preload applying mechanism (6) applies turn torque in one turning direction of a ball nut (4) on the basis of a reaction force generated as a result of a plunger (61) elastically engaging with tooth tips of first sector teeth (321) of a sector gear (32). As a result, unlike conventional steering devices, it is not necessary to provide the steering device (PS1) with a pressed part which is pressed by the plunger (61) separately from the sector gear (32). This makes it possible to prevent an increase in the size of a sector shaft (3) due to the formation of the pressed part.

IPC Classes  ?

• B62D 3/08 - Steering gears mechanical of worm type with screw and nut using intermediate balls or the like
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type

Abstract

In a motor-integrated electronic control device (2) of the present invention, a first connector (61) is provided at a first housing (81) on an opposite side to a motor (4), whereas a second connector (62) is provided at a second housing (82) on the motor (4) side, i.e. the first and second connectors (61, 62) are provided in different directions from each other, namely, that the first and second connectors (61, 62) are provided so as to face to mutually opposite directions. Therefore, a problem of intersection of electric signal of current flowing in electric circuit mounted on a first board (71) and electric signal of current flowing in electric circuit mounted on a second board (72) can be prevented. It is thus possible to suppress adverse effect on the electric circuit of the second board (72) by electric noise generated in the electric circuit of the first board (71).

IPC Classes  ?

• H02K 11/30 - Structural association with control circuits or drive circuits
• B60L 1/00 - Supplying electric power to auxiliary equipment of electrically-propelled vehicles
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• H02K 5/02 - Casings or enclosures characterised by the material thereof
• H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges

Abstract

A steering device includes a control unit that includes a hydraulic abnormality determiner. The hydraulic abnormality determiner is configured to determine a hydraulic abnormality to be present in a pair of liquid chambers of a power cylinder of the steering device, in response to satisfaction of a condition that a total torque of a steering torque measured by a torque sensor and a motor assist torque provided by an electric motor is greater than a predetermined threshold torque. The control unit is configured to increase the motor assist torque in response to satisfaction of a condition that the hydraulic abnormality determiner determines the hydraulic abnormality to be present.

IPC Classes  ?

• B62D 5/32 - Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means for telemotor systems
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/083 - Rotary valves
• B62D 5/12 - Piston and cylinder

Abstract

A steering device includes: a steering shaft; a transmitting mechanism configured to transmit the rotation of the steering shaft to a steered wheel; a power cylinder; a rotary valve configured to selectively supply a hydraulic fluid to the pair of the fluid chambers in accordance with the rotation of the steering shaft; and an electric motor configured to provide a rotation force through a speed reduction device to the steering shaft, the steering shaft including a first shaft connected to the steering wheel, and a second shaft connected to the first shaft, and configured to output the rotation force inputted from the first shaft, to the transmitting mechanism side, and the electric motor being connected through the speed reduction device to the second shaft.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 5/083 - Rotary valves

Abstract

In a steering device (PS1) according to the present embodiment, a preload applying mechanism (6) provides a rotation torque to one side in a rotation direction of a ball nut (4) by a reaction force generated by elastic abutment of a plunger (61) on a tooth tip of a first sector tooth (321) of a sector gear (32). Therefore, in the steering device (PS1), unlike conventional steering device, there is no need to provide a pressed portion to be pressed by the plunger (61) separately from the sector gear (32). Increase in size of a sector shaft (3) due to formation of the pressed portion can therefore be suppressed.

IPC Classes  ?

• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
• B62D 3/08 - Steering gears mechanical of worm type with screw and nut using intermediate balls or the like

Abstract

In a steering device (PS1) according to the present invention, a preload applying mechanism (6) applies turn torque in one turning direction of a ball nut (4), on the basis of a reaction force generated as a result of a plunger (61) elastically engaging with tooth tips of first sector teeth (321) of a sector gear (32). As a result, unlike conventional steering devices, it is not necessary to provide the steering device (PS1) with a pressed part which is pressed, separately from the sector gear (32), by the plunger (61). This makes it possible to prevent an increase in the size of a sector shaft (3) due to the formation of the pressed part.

IPC Classes  ?

• B62D 3/08 - Steering gears mechanical of worm type with screw and nut using intermediate balls or the like
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type

Abstract

A steering device includes: a steering mechanism including a steering shaft, and a transmitting mechanism; and a controller including a first hydraulic passage state judging section, a first electric motor control section, and a second electric motor control section; the first hydraulic passage state judging section configured to judge a state of the hydraulic fluid in a first hydraulic passage in which the hydraulic fluid discharged from the first pump flows, the first electric motor control section configured to control and drive the first electric motor based on a driving state of a vehicle, and the second electric motor control section configured to increase a rotation number of the second electric motor when the first hydraulic passage state judging section judges that a supply of the hydraulic fluid in the first hydraulic passage is deficient.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/065 - 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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
• B62D 5/083 - Rotary valves
• B62D 5/09 - 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 means for actuating valves
• B62D 5/30 - Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear

Abstract

A steering apparatus includes first and second electric motors that rotate a steering shaft via speed reduction mechanisms, and the motors being disposed to face each other. The first electric motor, a first motor pulley, a second motor pulley and the second electric motor are arranged in order in a rotation axis direction. When a first system electric actuator (including a first nut and the first electric motor) and a second system electric actuator (including a second nut and the second electric motor) are provided to the common steering shaft, in a first axis direction, the first and second nuts can be arranged close to each other, reducing sizes of the peripheries of the nuts.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear

Abstract

In a steering device of the present invention, an electric motor rotates a steering shaft through a reduction mechanism, and the reduction mechanism and a torque sensor are accommodated in an integrally-structured housing. With this, the present invention can provide a steering device that is capable of suppressing increase in size of the electric motor.

IPC Classes  ?

• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
• B62D 5/14 - Rotary motor
• B62D 5/083 - Rotary valves
• B62D 5/18 - 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 power transmitting means

Abstract

A vehicle-mounted apparatus includes: first and second voltage conversion circuits configured to convert voltages of electric powers supplied from first and second electric power supply circuits, to first and second predetermined voltages; first and second control circuits configured to be operated by the electric powers of the first and second predetermined voltages supplied from the first and second voltage conversion circuits, and to output first and second actuator command signals; first and second actuators configured to be actuated based on the first and second actuator command signals.

IPC Classes  ?

• B62D 5/12 - Piston and cylinder
• B60R 16/023 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for transmission of signals between vehicle parts or subsystems
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02P 5/74 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
• H02P 27/04 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
• H02P 29/028 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault

Abstract

A steering device includes: a first steering mechanism including a first ball nut steering, and a first motor actuator, the first ball nut steering including a first output shaft, a first ball screw, and a first transmitting mechanism, the first motor actuator arranged to provide a rotation force to the first output shaft, a second steering mechanism including a second ball nut steering, and a second motor actuator, the second ball nut steering including a second output shaft, a second ball screw, and a second transmitting mechanism, the second motor actuator arranged to provide a rotation force to the second output shaft, a connection member arranged to connect the first transmitting mechanism and the second transmitting mechanism so as to interlock a movement of the first transmitting mechanism and a movement of the second transmitting mechanism.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 3/08 - Steering gears mechanical of worm type with screw and nut using intermediate balls or the like
• B62D 6/04 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to forces disturbing the intended course of the vehicle, e.g. forces acting transversely to the direction of vehicle travel
• B62D 15/02 - Steering position indicators
• F16H 25/22 - Screw mechanisms with balls, rollers, or similar members between the co-operating partsElements essential to the use of such members

Abstract

[Problem] To provide an exhaust pipe opening/closing valve device which can be easily assembled at a low cost and smoothly operate even under a high-temperature and corrosive environment. [Solution] This exhaust pipe opening/closing valve device 1 is characterized by comprising: a valve housing 2 which is provided in an exhaust pipe 10 and has an inner peripheral hole 2a formed therein and constituting a portion of the exhaust pipe 10; a valve 3 supported so as to be capable of opening/closing the inner peripheral hole 2a of the valve housing 2; and an actuator 5 that rotates the valve 3, wherein the valve housing 2 has a rotary shaft hole 2b which is formed in the inner peripheral hole 2a and supports the valve 3 and into which a wire bush 61 is inserted, and the valve 3 has a rotary shaft member 32 rotatably supported in the rotary shaft hole 2b via the bush 61, and a valve body 31 that is fixed to the rotary shaft member 32 and opens or closes the inner peripheral hole 2a.

IPC Classes  ?

• F02D 9/10 - Throttle valves specially adapted thereforArrangements of such valves in conduits having pivotally-mounted flaps

Abstract

Provided is an actuator for a steering system, which can be increased in degree of freedom for design change, regardless of a configuration change of a hydraulic power steering side. The actuator for a steering system comprises a transmission mechanism configured to transmit the rotation of a steering shaft to a steered wheel, a piston disposed in the transmission mechanism, and a pair of pressure chambers configured to generate a force acting to move the piston. The actuator for a steering system is disposed between a hydraulic power steering system, which imparts a steering force to the steered wheel along with the movement of the piston, and a steering wheel. The actuator for a steering system includes an input shaft which is rotatably and axially supported by the housing and disposed in the steering wheel side; an output shaft which is rotatably and axially supported by the housing and disposed in the hydraulic power steering system; a torsion bar connecting the input shaft and the output shaft; a motor rotor disposed around the outer periphery of the output shaft within the housing and configured to rotate integrally with the output shaft; a motor stator disposed around the outer periphery of the motor rotor within the housing; and a rotation angle detecting section disposed within the housing and configured to detect the rotation angles of the input and output shafts or a relative angle of the input and output shafts.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/12 - Piston and cylinder

Abstract

A clutch control device and a clutch control method are capable of preventing progress of wear and damage of a pneumatic clutch actuator. The clutch control device that controls the operation of a pneumatic clutch actuator to disconnect a clutch is characterized by setting a stroke amount of a piston corresponding to a disconnection position of the clutch as a final target stroke amount, setting other stroke amounts different from the final target stroke amount as intermediate target stroke amounts, and controlling the operation of the piston in a stepwise manner such that an actual stroke amount of the piston is matched with the intermediate target stroke amounts and is thereafter matched with the final target stroke amount, thereby disconnecting the clutch.

IPC Classes  ?

• F16D 48/06 - Control by electric or electronic means, e.g. of fluid pressure
• F16D 48/02 - Control by fluid pressure
• F16D 25/00 - Fluid-actuated clutches

Abstract

b divided by piston 31 and providing steering force to steering mechanism, torque sensor 11 detecting steering torque Tr of steering mechanism, rotary valve 30 selectively supplying working fluid supplied from pump 9 to the pair of hydraulic chambers according to relative rotation between input and output shafts, hollow shaft motor 10 providing steering force to input shaft, control unit 13 in which microcomputer is mounted, and torque command signal operating section 61 provided in control unit and configured to calculate torque command signal Tm* for driving and controlling electric motor 10 on the basis of the steering torque Tr and vehicle speed Vs and when vehicle speed is a predetermined vehicle speed or greater, set torque command signal to 0. With this, physical size of power steering device can be decreased.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 6/02 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to vehicle speed
• B62D 5/083 - Rotary valves
• B62D 5/12 - Piston and cylinder
• B62D 5/065 - 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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

A power steering apparatus includes a steering shaft 10 including an input shaft 11, an intermediate shaft 13 connected through a first torsion bar 12 to the input shaft, and an output shaft 15 connected through a second torsion bar 14 to the intermediate shaft; a hollow motor 30 to provide a rotational force to the intermediate shaft; and a control device 60 including a microcomputer, and including an output shaft rotation angle presuming section 63 to presume an output shaft rotation angle θg based on signals of an input shaft rotation angle θh and an intermediate shaft rotation angle θm, a torsion spring constant g1 and g2 of the first and second torsion bars; and a motor drive control section 69 to control the hollow motor based on the output shaft rotation angle.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 5/065 - 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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
• B62D 5/083 - Rotary valves
• B62D 6/02 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to vehicle speed
• B62D 5/12 - Piston and cylinder
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits

Abstract

[Problem] To propose a rotation detecting device, a gear shift unit, and a transmission system which can allow reduction of cost. [Solution] A rotation detecting device (322) comprises a magnetic field generating unit (M1) set at an end portion of a rotary shaft (2124), and a magnetic field detecting unit (M2) arranged near the magnetic field generating unit (M1), and is characterized in that the magnetic field generating unit (M1) includes a ferromagnetic body (M11) and a soft magnetic body (M12), and rotates with rotating operation of the rotary shaft (2124), and the magnetic field detecting unit (M2) detects a magnetic field which changes according to rotation of the magnetic field generating unit (M1).

IPC Classes  ?

• G01D 5/245 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trainsMechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means generating pulses or pulse trains using a variable number of pulses in a train
• F16H 61/34 - Generation or transmission of movements for final actuating mechanisms comprising two mechanisms, one for the preselection movement, and one for the shifting movement

Abstract

[Problem] To propose a rotation detecting device, a gear shift unit, and a transmission system which allow reduction of cost. [Solution] A rotation detecting device (322) comprises a magnetic field generating unit (M1) set at an end portion of a rotary shaft (2124), and a magnetic field detecting unit (M2) arranged near the magnetic field generating unit (M1), and is characterized in that: the magnetic field generating unit (M1) includes a ferromagnetic body (M11) and a soft magnetic body (M12) and rotates with rotating operation of the rotary shaft (2124); the magnetic field detecting unit (M2) detects a magnetic field which changes according to rotation of the magnetic field generating unit (M1); a magnetic field generating unit (M1B, M1C) has a hole formed at the center portion thereof; and the magnetic field detecting unit (M2) is arranged inside the hole.

IPC Classes  ?

• G01B 7/30 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapersMeasuring arrangements characterised by the use of electric or magnetic techniques for testing the alignment of axes
• G01D 5/14 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage

Abstract

[Problem] To propose a clutch control device and a clutch control method capable of preventing progress of wear and damage of a pneumatic clutch actuator. [Solution] A clutch control device (15) that controls the operation of a pneumatic clutch actuator (18) to disconnect a clutch (19) is characterized by setting a stroke amount of a piston (186) corresponding to a disconnection position of the clutch (19) as a final target stroke amount (TS3), setting other stroke amounts different from the final target stroke amount (TS3) as intermediate target stroke amounts (TS1, TS2), and controlling the operation of the piston (186) in a stepwise manner such that an actual stroke amount (AS) of the piston (186) is matched with the intermediate target stroke amounts (TS1, TS2) and is thereafter matched with the final target stroke amount (TS3), thereby disconnecting the clutch (19).

IPC Classes  ?

• F16D 48/02 - Control by fluid pressure

Abstract

Provided is a power steering device capable of causing control that uses a pump device and control that uses an electric motor on an input shaft to cooperate with each other. The power steering device includes a power cylinder including a pair of hydraulic chambers partitioned by a piston and configured to generate a steering assist force for a steered wheel, a pump device configured to be driven through control by a first electric motor and configured to discharge working fluid, a rotary valve configured to selectively supply the working fluid supplied from the pump device to the pair of hydraulic chambers in accordance with relative rotation between the input shaft and the output shaft, a second electric motor provided so as to surround at least a part in an axial direction of the input shaft and configured to control the rotation of the input shaft, and a second electric motor control part installed in a control device and configured to output a control signal for controlling driving of the second electric motor based on a revolution number signal of the first electric motor.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• B62D 5/14 - Rotary motor
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/083 - Rotary valves
• B62D 5/12 - Piston and cylinder
• B62D 5/22 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
• B62D 5/00 - Power-assisted or power-driven steering
• B62D 5/065 - 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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist

Abstract

A steering shaft 10 is constructed by an input shaft 11, an intermediate shaft 13 connected to the input shaft 11 through a first torsion bar 12 and an output shaft 15 connected to the intermediate shaft 13 through a second torsion bar 14, and around the input shaft 11, there is provided a first resolver 51 for detecting a rotation angle of the input shaft 11 and around the intermediate shaft 13, there is provided a second resolver 52 for detecting a rotation angle of the intermediate shaft 13, and the first and second resolvers 51 and 52 are arranged to constitute a torque sensor TS that detects a steering torque.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 15/02 - Steering position indicators
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/12 - Piston and cylinder

Abstract

The present invention provides a power steering apparatus capable of realizing a reduction in an axial dimension of the apparatus. A resolver 16, which detects a rotational position of a motor rotor 13, is provided between a motor element 15 and a steering housing 6 in a direction of an x axis. A bolt 19, which fixes a motor housing 17 to the steering housing 6, is provided so as to overlap the resolver 16 in the direction of the x axis radially outside the resolver 16.

IPC Classes  ?

• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 5/09 - 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 means for actuating valves
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
• B62D 3/14 - Steering gears hydraulic
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits

Abstract

A first valve accommodation hole is provided in a valve housing. A first valve element, a first valve seat member, a first coil spring, and a first pin are directly accommodated and disposed in the first valve accommodation hole. It is thereby possible to reduce the maximum diameter t1 of the first valve accommodation hole, thus reducing the size of a housing main body.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/22 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
• B62D 5/083 - Rotary valves
• B62D 5/07 - Supply of pressurised fluid for steering also supplying other consumers
• B62D 5/087 - Sliding spool valves
• B62D 5/12 - Piston and cylinder
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
• F16K 31/48 - Mechanical actuating means actuated by mechanical timing-device, e.g. with dash-pot

Abstract

A power steering device is provided with a device body and a hollow motor. The device body has a steering system in which a piston is disposed on an output shaft via a ball screw mechanism so that a steering (rotational) torque is transmitted from an input shaft to the output shaft and converted to rotation of a sector shaft by axial movement of the piston for steering of steerable wheels. The hollow motor is connected to the outer circumference of the input shaft and driven by energization control based on driving support information from a vehicle-mounted camera and the like. A key and a key groove are provided on the outer circumference of the input shaft and the inner circumference of a rotor of the hollow motor, respectively, so as to constitute a key connection between the input shaft and the hollow motor.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
• H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
• H02K 7/06 - Means for converting reciprocating motion into rotary motion or vice versa
• B62D 5/09 - 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 means for actuating valves
• B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
• B62D 6/00 - Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
• F16C 35/063 - Fixing them on the shaft
• F16C 35/067 - Fixing them in a housing
• H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
• B62D 5/083 - Rotary valves
• B62D 5/12 - Piston and cylinder
• B62D 5/14 - Rotary motor
• B62D 5/22 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type

Abstract

In a stroke-limiter equipped integral power steering apparatus, a valve body of a spring-loaded-plunger-equipped limiter valve is configured to enable a position of the valve body relative to a housing to be adjusted in a longitudinal direction of the valve body via an intermediate sleeve.

IPC Classes  ?

• B62D 5/22 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type

Abstract

A power steering apparatus including a power cylinder, first and second pumps, a control valve serving for selectively supplying a working fluid supplied from the first or second pump to one of a pair of pressure chambers of the power cylinder in accordance with a steering operation, first and second reservoir tanks, and a return passage changeover valve disposed between the control valve and the first and second pumps, the return passage changeover valve serving for communicating the first and second pumps with the control valve regardless of an axial position of a valve element and communicating one of the first and second reservoir tanks with the control valve in accordance with the axial position of the valve element to thereby carry out changeover between circulating fluid passages for circulating the working fluid to the first reservoir tank and the second reservoir tank.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
• B62D 5/30 - Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
• B62D 5/24 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for worm type
• B62D 5/065 - 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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist

Abstract

An integral power steering apparatus includes a hydraulic actuator having a piston separating pressure chambers for steering assistance and a limiter valve to be opened by movement of the piston to fluidly connect the pressure chambers. The limiter valve includes an adjuster for adjusting a press-fit position of a spring pin press fit in a plunger. The adjuster includes a movable adjusting member formed with an abutting surface to abut against the plunger to limit rearward plunger movement when the movable adjusting member is at a first adjuster position, and a regulating member to hold the movable adjusting member at the first adjuster position at the time of adjustment, and to enable the movable adjusting member to move to a second adjuster position after adjustment.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle

Abstract

Disclosed is a power steering system comprising: a control valve disposed in the steering mechanism to selectably supply a working liquid supplied from a first pump or a second pump to a pair of pressure chambers of a power cylinder providing a steering force for at least one steered wheel in accordance with a rotational steering operation of a steering wheel; a first switching valve disposed between the first pump and the control valve to switch a communication and an interruption of the working liquid between the first pump and the control valve; and a second switching valve disposed between the second pump and the control valve to switch the communication and the interruption of the working liquid between the second pump and the control valve, a communication state and an interruption state being selectably formed in the second switching valve when the first switching valve is in the communication state.

IPC Classes  ?

• B62D 5/06 - Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle