公开(公告)号：JP2000351383A

公开(公告)日：2000-12-19

申请号：JP23414399

申请日：1999-08-20

Applicant: TOYOTA MOTOR CORP

Inventor： KOSHIRO TAKAHIRO ,  KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  NAKATSU CHIKATOSHI ,  SHINTO MASAHIKO

IPC: B62D6/00 ,  B62D5/22

Abstract: PROBLEM TO BE SOLVED: To provide a steering control device for a vehicle to execute suitable steering control from the time at which control is started by a method wherein combination of a relative angle sensor and an absolute angle sensor from a point of view of control is used as a detecting sensor. SOLUTION: A working angle sensor is provided to detect the working angle of the actuator of a transmission ratio varying mechanism by an absolute angle. A working angle θm0 detected by a working angle sensor is stored during completion of control (S122). During reopening of control, based on the working angle θm0 and a transmission ratio G0, the absolute angle θh0 of a steering handle is estimated (S104).

公开(公告)号：JP2000211541A

公开(公告)日：2000-08-02

申请号：JP1438999

申请日：1999-01-22

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B62D1/19 ,  B62D1/20 ,  B62D3/12 ,  B62D5/04 ,  B62D5/22 ,  B62D6/00 ,  B62D113/00

Abstract: PROBLEM TO BE SOLVED: To enable mounting of a transmission ratio variable mechanism without a large change in the existing structure by constructing a steering shaft of a forward end shaft part, intermediate shaft part and rear end shaft part connected mutually in series under a bent state via a joint member, and providing a transmission variable mechanism at the intermediate shaft part. SOLUTION: A steering shaft is constructed of a forward end shaft part, rear end shaft part, and an intermediate shaft part 300 connecting the two to each other. The forward end shaft part is connected to the intermediate shaft part 300 and the rear end shaft part is connected to the intermediate shaft part 300 in a bent state via constant velocity joints 50, 60, respectively. A drive motor for a transmission ratio variable mechanism composed of a stator 321 and a rotor 322 is constructed at the inner side of cylinder surface of a housing 310 constituting the intermediate shaft part 300. In the vicinity of the intermediate shaft part 300, a mounting space is relatively acquired. Accordingly, with the provision of the transmission ratio variable mechanism at the intermediate shaft part 300, the purpose is attained.

公开(公告)号：JPH11263238A

公开(公告)日：1999-09-28

申请号：JP6683498

申请日：1998-03-17

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B62D6/00 ,  B62D101/00 ,  B62D113/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To provide a steering response characteristic according to a change in a motion characteristic by providing a transmission ratio varying means provided in the midway of a steering transmission system for connecting a steering wheel with a steering wheel for varying a transmission ratio between the steering amount of the steering wheel and the steering amount of the steering wheel based on a wheel state. SOLUTION: A variable gear ratio unit 14 varies a transmission ratio between the steering amount of a steering wheel 10 and the steering amounts of steering wheels 24FL and 24FR, and is provided with a motor and a reduction gear using a planetary gear mechanism, a harmonic drive mechanism or the like. This transmission ratio is defined by (steering amount of the steering wheel 10)/(steering amounts of the steering wheels 24FL and 24FR). Also, the variable gear ratio unit 14 is connected to an ECU 30 via a motor driver 36, and operated by receiving the control signal of this ECU 30. When a wheel state is changed to change the motion characteristic of the vehicle, the transmission ratio of the steering transmission system is changed according to the vehicle state.

公开(公告)号：JPH11245833A

公开(公告)日：1999-09-14

申请号：JP4945698

申请日：1998-03-02

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B62D6/00 ,  B62D101/00 ,  B62D113/00 ,  B62D127/00 ,  B62D137/00 ,  G08G1/16

Abstract: PROBLEM TO BE SOLVED: To provide a steering controller for vehicle which variably control the transmission ratio on the basis of the transmission ratio optimum for the traveling environment. SOLUTION: A steering controller for vehicle 2 interposing a variable gear ratio unit 14 midway of a steering transmission system which connects a steering wheel 10 and steered wheels 24, and providing with an ECU 30 which controls the transmission ratio corresponding to the condition of the vehicle, further has a navigation device 34 for detecting the traveling environment of the vehicle, and changes the transmission ratio of the variable gear ratio unit 14 through the ECU 30 on the basis of the traveling environment detected by the navigation device 34.

公开(公告)号：JPH1134894A

公开(公告)日：1999-02-09

申请号：JP3482898

申请日：1998-02-17

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B62D1/10 ,  B62D5/04 ,  B62D5/22 ,  B62D6/00 ,  B62D121/00

Abstract: PROBLEM TO BE SOLVED: To hold the relation between the steering quantity of a steering handle and the steering quantity of a steering wheel, even if an excessive load is inputted to a transmission rate variable means in traveling. SOLUTION: A steering wheel for a vehicle is provided with a variable gear ratio unit 14 which is provided in a steering shaft for connecting a steering handle to the steering wheel and variably changes the transmission ratio by the drive of a motor 40, a rotation member 68 which is provided with an engagement part installed in the rotary shaft side of the motor 40, and relative rotation limit means 60, 62, 64 which can limit the relative rotation between the housing 44 for the motor 40 and the rotation member 68.

公开(公告)号：JP2001048031A

公开(公告)日：2001-02-20

申请号：JP22532599

申请日：1999-08-09

Applicant: TOYOTA MOTOR CORP

Inventor： KOSHIRO TAKAHIRO ,  KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  SHINTO MASAHIKO ,  YAMAGUCHI RYUJI ,  NAKATSU CHIKATOSHI

IPC: B62D6/00 ,  B62D101/00 ,  B62D113/00

Abstract: PROBLEM TO BE SOLVED: To provide a steering angle detector which can more finely grasp changing of a steering angle without applying a change in the point of structure to the conventional steering angle detector. SOLUTION: In the point of time changing of a steering angle θh is detected, an estimated steering angular speed θhhv is set on the basis of time ΔT required for changing, detected angle pitch Θ, etc., next during the time till detecting the steering angle θh, it is assumed to change at the estimated steering angular speed θhhv, the steering angle θh in the point of arbitrary time is set as an estimated steering angle θhh.

公开(公告)号：JPH11334627A

公开(公告)日：1999-12-07

申请号：JP14765898

申请日：1998-05-28

Applicant: TOYOTA MOTOR CORP

Inventor： KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO

IPC: B62D6/00 ,  B62D5/00 ,  B62D6/02 ,  B62D101/00 ,  B62D113/00

Abstract: PROBLEM TO BE SOLVED: To set a preferable transmission ratio appropriate for steering operation during turning that involves acceleration or deceleration by determining a correction amount for a basic transmission ratio based on a steering state while a vehicle is in acceleration/deceleration state, and setting the transmission ratio of a transmission ratio variable mechanism. SOLUTION: A steering control unit 70 sets a transmission ratio G of a transmission ratio variable mechanism 30 based on a basic transmission value Gbase which is set according to a vehicle speed V and correction amount α which is set according to a steering state and an acceleration/deceleration state of a vehicle. When the steering wheel is turned, the correction amount α is set to -α0 and when the steering wheel is returned, the correction amount α is set to α0 . Accordingly, when turning the steering wheel during acceleration/deceleration, the transmission ratio becomes more quick than the basic transmission ratio Gbase and a steer amount of the steering wheel when turning can be reduced. When returning the steering wheel during acceleration/deceleration, the basic transmission ratio Gbase becomes more slow, so that a turning angle of a wheel for the same steering angle is directed to a position closer to a neutral position, thereby the steering wheel steer amount during returning is reduced.

公开(公告)号：JPH11321683A

公开(公告)日：1999-11-24

申请号：JP13047398

申请日：1998-05-13

Applicant: TOYOTA MOTOR CORP

Inventor： KAWAMURO JIYUNJI ,  MATSUDA MORIHIRO ,  SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO

IPC: B62D6/00 ,  B62D101/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To provide a steering control device for vehicle capable of improving the steering operability in case of suddenly changing the behavior of the vehicle. SOLUTION: A value of yaw rate γs is estimated on the basis of the input angle θh and the car speed V (S 104), and in the case where a deviation between the estimated yaw rate γs and the real yaw rate γ exceeds a threshold value γth (YES in S 106), a value of the transmission ratio Gold set in the last routine is set as a transmission ratio G again (S 122), and change of the transmission ratio G is prohibited.

公开(公告)号：JPH10305779A

公开(公告)日：1998-11-17

申请号：JP1129898

申请日：1998-01-23

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO ,  KOSHIRO TAKAHIRO ,  MATSUDA MORIHIRO ,  KAWAMURO JIYUNJI

IPC: B62D1/20 ,  B62D5/04 ,  B62D6/00 ,  B62D101/00 ,  B62D119/00 ,  B62D137/00

Abstract: PROBLEM TO BE SOLVED: To reduce differential controlled variable and eliminate deviation of a neutral point by making a transmission ratio varying means of a steering transmission system connecting a steering handle and a steering wheel a frictional type continuously variable transmission. SOLUTION: When vehicle speed detected by a speed sensor 48 is inputted in an electronic controller(ECU) 46, the slide location of a ring body 14e of a continuously variable transmission 14 is determined according to speed and a gear shift instruction value for the slide is outputted. A gear ratio variable motor 30 revolves based on the gear shift instruction value, the revolution is transmitted to a worm gear 32, a guide member 34 moves along a slide pin 36, the ring body 14e of the continously variable transmission 14 moves upward at the time of low speed and moves downward at the time of high speed, each gear ratio is made small or large and the steering of a steering handle 10 can be performed in a quick or slow state. The ECU 46 determines the theoretical value of the gear ratio by the speed detected by the speed sensor 48, compares the value with a target steering angle and corrects deviation, and deviation of a neutral point can be eliminated by operational controlled variable.

公开(公告)号：JPH1053144A

公开(公告)日：1998-02-24

申请号：JP21169096

申请日：1996-08-09

Applicant: TOYOTA MOTOR CORP

Inventor： SHINTO MASAHIKO

IPC: B62D1/18

Abstract: PROBLEM TO BE SOLVED: To improve and quietness and smoothness during telescopic operation. SOLUTION: An approximate cylindrical guide bush 58 with which a inner tube 14 is brought into slide contact during relative movement of the inner tube 14 during telescopic operation is located between a gap 56 between an outer tube 12 and the inner tube 14. A pair of extension parts 64 are formed at the two end parts of the guide bush 58 and further a regulation part 72 is formed bent toward the axis side is formed at the tip part of each extension part 64. Thus, it is regulatable that the inner tube 14 is displaced to the wedge lock 54 side during unlocking of a lock. This constitution prevents the generation of noise when the inner tube 14 is brought into contact with the wedge lock 54 during unlocking of a lock and enables smooth relative movement of the inner tube 14 to the outer tube 12.